Battery pack liquid cooling device

Abstract

The utility model provides a liquid cooling device for a battery pack, and belongs to the field of new energy batteries. The device comprises a bottom plate, two side plates parallel to each other and a plurality of first partition plates, the side plates and the first partition plates are perpendicularly arranged on the bottom plate, the first partition plates are perpendicular to the side plates, the first partition plates are arranged in parallel at intervals, the first partition plates are only connected with one side plate, and every two adjacent first partition plates are connected with different side plates to form a flow channel. A water inlet is formed in one end of the flow channel, a water outlet is formed in the other end of the flow channel, heat dissipation fins are arranged in the flow channel, and a plurality of protrusions are arranged on the heat dissipation fins. By adopting the battery pack liquid cooling device provided by the embodiment of the utility model, the problem that a heat dissipation structure in a battery pack in the prior art is relatively low in heat dissipation efficiency can be solved.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, and in particular to a battery pack liquid cooling device. Background Art

[0002] With the development of new energy vehicles, in order to increase the maximum mileage, new energy vehicles need to continuously improve the energy density of batteries. However, high-energy-density new energy batteries tend to generate heat during operation, which increases the battery temperature. In order to ensure the normal operation and safety performance of new energy batteries, a good thermal management solution is needed to enhance the heat dissipation and cooling effect of the battery pack.

[0003] The battery pack heat dissipation solution in the existing related technology generally adopts liquid cooling, and the liquid cooling plate in the existing related technology only adds liquid cooling channels on the substrate. Due to the limited heat dissipation area and more bends and turns, it leads to low heat dissipation efficiency and uneven heat dissipation.

[0004] The heat dissipation efficiency of the battery pack liquid cooling device in the existing related technology is low. Utility Model Content

[0005] The present utility model provides a battery pack liquid cooling device, which can solve the problem of low heat dissipation efficiency of the heat dissipation structure in the battery pack in the prior art. The technical solution is as follows:

[0006] A battery pack liquid cooling device, comprising: a liquid cooling plate,

[0007] The liquid cooling plate includes a bottom plate, two side plates parallel to each other and a plurality of first partitions, the side plates and the first partitions are vertically arranged on the bottom plate, the first partition is perpendicular to the side plates, and the plurality of first partitions are arranged in parallel and spaced apart, the first partition is connected to only one of the side plates, and two adjacent first partitions are connected to different side plates to form a flow channel, a water inlet is provided at one end of the flow channel, and a water outlet is provided at the other end, heat dissipation fins are provided in the flow channel, and a plurality of protrusions are provided on the heat dissipation fins.

[0008] Optionally, a second partition is disposed between two adjacent first partitions, the second partition is disposed parallel to and spaced from the first partition, and the second partition is not connected to the side plate.

[0009] Optionally, a heat dissipation fin is arranged in the flow channel, and a plurality of protrusions are arranged on the heat dissipation fin.

[0010] Optionally, the number of the heat dissipation fins located on the water outlet side is greater than the number of the heat dissipation fins located on the water inlet side.

[0011] Optionally, the protrusion is a convex plate, and a plurality of the convex plates are arranged in parallel and at intervals.

[0012] Optionally, the distances between the plurality of convex plates are equal.

[0013] Optionally, the protrusions are cylindrical protrusions, and a plurality of cylindrical protrusions are arranged at intervals.

[0014] Optionally, a plurality of the cylindrical protrusions are arranged in an array.

[0015] Optionally, the liquid cooling plate is composed of a first spliced ​​plate and a second spliced ​​plate.

[0016] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0017] A battery pack liquid cooling device provided in an embodiment of the utility model allows the coolant to flow smoothly in the flow channel formed by the bottom plate, the first partition plate and the side plate. Compared with traditional liquid cooling devices with more bends and turns, the flow channels provided in the embodiment of the utility model are mostly interconnected direct current channels, so that the coolant can pass through the flow channel more quickly to quickly complete the heat dissipation, which can effectively solve the problem of low heat dissipation efficiency of the heat dissipation structure in the battery pack in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the device provided by the embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a heat dissipation fin provided in an embodiment of the utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of a heat dissipation fin provided by an embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram showing the structure of another heat dissipation fin plate provided in an embodiment of the utility model.

[0023] In the figure: 1-liquid cooling plate; 101-first assembled plate; 102-second assembled plate; 11-bottom plate; 12-side plate; 121-water inlet; 122-water outlet; 13-first partition plate; 14-flow channel; 15-second partition plate; 16-heat dissipation fin; 161-protrusion; 162-convex plate; 163-cylindrical protrusion. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the device provided by the embodiment of the utility model; Figure 2 This is a schematic structural diagram of a heat dissipation fin provided in an embodiment of the utility model; Figure 3 This is a cross-sectional schematic diagram of a heat dissipation fin provided by an embodiment of the utility model; Figure 4 FIG. 1 is another schematic diagram of the heat dissipation fin structure provided by the embodiment of the utility model. Figures 1 to 4 A battery pack liquid cooling device shown includes: a liquid cooling plate 1, the liquid cooling plate 1 includes a bottom plate 11, two side plates 12 parallel to each other and a plurality of first partitions 13, the side plates 12 and the first partitions 13 are vertically arranged on the bottom plate 11, the first partition 13 is perpendicular to the side plate 12, the plurality of first partitions 13 are arranged in parallel and spaced apart, the first partition 13 is connected to only one side plate 12, and two adjacent first partitions 13 are connected to different side plates 12 to form a flow channel 14, a water inlet 121 is provided at one end of the side plate 12, a water outlet 122 is provided at the other end, and the water inlet 121 and the water outlet 122 are connected to the flow channel 14.

[0026] Exemplarily, in the embodiment of the utility model, the liquid cooling plate 1 is arranged at the bottom of the battery pack, and a layer of diaphragm is also arranged between the liquid cooling plate 1 and the battery pack to isolate the coolant from the battery pack and prevent the coolant from directly contacting the battery pack. The liquid cooling plate 1 is a box-shaped structure with an upper end opening, and the two parallel and opposite side panels 12 are two sealed edges of the box-shaped structure. The first partition 13 is arranged in parallel and spaced apart from the side panels 12, and the height of the first partition 13 is consistent with the height of the side panels 12, so that when the diaphragm cover at the bottom of the battery pack is arranged on the liquid cooling plate 1, the first partition 13 can separate the internal space of the liquid cooling plate 1 into mutually connected flow channels 14, and the flow channel 14 is a plurality of interconnected direct flow channels, and the coolant flows in the direct flow channel and turns at the place where the first partition 13 and the side panel 12 are not connected, so that the coolant passes through the flow channel 14 from the water inlet 121 and then flows out from the water outlet 122. The flow channel arranged in this way can make the coolant contact with the bottom of the battery pack to the maximum extent, thereby increasing the cooling efficiency of the battery pack cooling device. Since the overall structure of the flow channel 14 is mostly a straight flow channel, the resistance of the coolant to flow in the flow channel 14 can be reduced, so that the coolant can circulate more quickly, thereby further increasing the cooling efficiency of the battery pack cooling device. After the coolant in the flow channel 14 absorbs the heat transferred from the battery pack during operation, the increase in the coolant temperature in the flow channel 14 will reduce the cooling effect of the coolant in the flow channel 14. A heat sink fin 16 is provided in the flow channel 14, and a plurality of protrusions 161 are provided on the heat sink 16. The outer surface of the protrusion 161 is in contact with the coolant in the flow channel 14. The heat sink fin 16 can be further cooled by other means. For example, in this embodiment, Figure 3 As shown, a cavity structure can be provided inside the heat dissipation fin 16, and new coolant is also introduced into the cavity structure of the heat dissipation fin 16, so that the protrusion 161 located on the heat dissipation fin 16 can further cool the coolant in the flow channel 14, so that the coolant in the flow channel 14 can better absorb the heat transferred from the battery pack, thereby further increasing the cooling efficiency of the battery pack cooling device.

[0027] A battery pack liquid cooling device provided in an embodiment of the present invention enables the coolant to flow smoothly in the flow channel 14 through a flow channel 141 formed by a bottom plate 11, a first partition plate 13 and a side plate 12. Compared with a traditional liquid cooling device having more bends and turns, the flow channel 14 provided in the embodiment of the present invention is mostly a connected direct current channel, so that the coolant can pass through the flow channel 14 more quickly to quickly complete the heat dissipation, which can effectively solve the problem of low heat dissipation efficiency of the heat dissipation structure in the battery pack in the prior art.

[0028] Optionally, a second partition plate 15 is disposed between two adjacent first partition plates 13 , the second partition plate 15 is disposed parallel to and spaced from the first partition plates 13 , and the second partition plate 15 is not connected to the side plate 12 .

[0029] Illustratively, in an embodiment of the utility model, a second partition 15 is provided to form a plurality of interconnected cooling flow channels in the flow channel 14. The plurality of interconnected cooling straight flow channels reduce the flow resistance of the coolant in the flow channel 14, thereby ensuring the uniformity of flow distribution and reducing the generation of a flow boundary layer, affecting the heat dissipation effect, thereby further increasing the cooling efficiency of the battery pack cooling device.

[0030] Optionally, the number of the heat dissipation fins 16 located on one side of the water outlet 122 is greater than the number of the heat dissipation fins 16 located on one side of the water inlet 121 .

[0031] For example, in the embodiment of the utility model, since the temperature of the coolant is the lowest when it enters the flow channel 14 from the water inlet 121, as the coolant flows in the flow channel 14, it absorbs more and more heat from the battery pack, so that the temperature of the coolant gradually increases. When the coolant reaches the side of the water outlet 122, the temperature of the coolant is the highest, and then it flows out from the water outlet 122. In this process, the temperature in the flow channel 14 near the water outlet 122 is higher, so by setting the number of heat dissipation fins 16 on the side of the water outlet 122 to be greater than the number of heat dissipation fins 16 on the side of the water inlet 121, the coolant can still absorb the heat energy of the battery pack well when it reaches the side of the water outlet 122. After experiments, when the ratio of the number of heat dissipation fins 16 on the side of the water outlet 122 to the number of heat dissipation fins 16 on the side of the water inlet 121 is 3:2, the heat dissipation efficiency is optimal. Through this design, the cooling efficiency of the battery pack cooling device is further improved.

[0032] Optionally, the protrusion 161 is a protruding plate 162 , and a plurality of protruding plates 162 are arranged in parallel and at intervals.

[0033] Illustratively, in an embodiment of the utility model, the protrusion 161 is set in the form of a convex plate 162, which can increase the contact area between the convex plate 162 and the coolant in the flow channel 14. At the same time, since it is in a plate shape, the coolant in the main flow channel can flow into the branch flow channel more easily, thereby reducing the flow resistance of the coolant and further improving the cooling efficiency of the battery pack cooling device.

[0034] Optionally, distances between the plurality of protruding plates 162 are equal.

[0035] Exemplarily, in an embodiment of the utility model, by setting the spacing between the multi-convex plates 162 to be equal, the coolant in the main channel can be further made to flow more easily into the branch channel, thereby ensuring the uniformity of flow distribution and reducing the generation of flow boundary layers, thereby further improving the cooling efficiency of the battery pack cooling device.

[0036] Optionally, the protrusion 161 is a cylindrical protrusion 163 , and a plurality of cylindrical protrusions 163 are arranged at intervals.

[0037] Exemplarily, in an embodiment of the utility model, the protrusion 161 is set in the form of a cylindrical protrusion 163, so that the coolant in the flow channel 14 can be separated from the cylindrical protrusion 163 to the maximum extent. At this time, the contact area between the outer surface of the cylindrical protrusion 163 and the flow channel 14 is the largest, which can further improve the cooling efficiency of the battery pack cooling device.

[0038] Optionally, a plurality of cylindrical protrusions 163 are arranged in an array.

[0039] Exemplarily, in an embodiment of the utility model, by arranging the multiple cylindrical protrusions 163 in an array, that is, the spacing between two adjacent cylindrical protrusions 163 arranged laterally and vertically is the same, the coolant in the main channel can be further made to flow more easily into the branch channel, ensuring the uniformity of flow distribution while reducing the generation of flow boundary layer, thereby further improving the cooling efficiency of the battery pack cooling device.

[0040] Optionally, the liquid cooling plate 1 is composed of a first spliced ​​plate 101 and a second spliced ​​plate 102 .

[0041] For example, in the embodiment of the utility model, since the overall structure of the battery pack is relatively large, it is difficult and costly to manufacture a whole liquid cooling plate 1 at one time. When the liquid cooling plate 1 is assembled by two left and right first and second splicing plates 101 and 102, the first and second splicing plates 101 and 102 can be manufactured and processed separately, thereby reducing the production difficulty and production cost. At the same time, when the first and second splicing plates 101 and 102 have problems during use, only the splicing plates with problems can be replaced, thereby reducing the maintenance cost.

[0042] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery pack liquid cooling device, characterized in that: include: Liquid cooling plate (1), The liquid cooling plate (1) comprises a bottom plate (11), two side plates (12) parallel to each other and a plurality of first partitions (13); the side plates (12) and the first partitions (13) are vertically arranged on the bottom plate (11); the first partitions (13) are vertically arranged on the side plates (12); the plurality of first partitions (13) are arranged in parallel and spaced apart; the first partition (13) is connected to only one of the side plates (12); and two adjacent first partitions (13) are connected to different side plates (12) to form a flow channel (14); a water inlet (121) is provided at one end of the flow channel (14) and a water outlet (122) is provided at the other end; a heat dissipation fin (16) is provided in the flow channel (14); and a plurality of protrusions (161) are provided on the heat dissipation fin (16).

2. A battery pack liquid cooling device according to claim 1, characterized in that: A second partition (15) is arranged between two adjacent first partitions (13); the second partition (15) is arranged in parallel and spaced apart from the first partition (13); and the second partition (15) is not connected to the side plate (12).

3. A battery pack liquid cooling device according to claim 1, characterized in that: The number of the heat dissipation fins (16) located on one side of the water outlet (122) is greater than the number of the heat dissipation fins (16) located on one side of the water inlet (121).

4. A battery pack liquid cooling device according to claim 1, characterized in that: The protrusion (161) is a protruding plate (162), and a plurality of the protruding plates (162) are arranged in parallel and at intervals.

5. A battery pack liquid cooling device according to claim 4, characterized in that: The distances between the plurality of convex plates (162) are equal.

6. A battery pack liquid cooling device according to claim 1, characterized in that: The protrusion (161) is a cylindrical protrusion (163), and a plurality of cylindrical protrusions (163) are arranged at intervals.

7. A battery pack liquid cooling device according to claim 6, characterized in that: The plurality of cylindrical protrusions (163) are arranged in an array.

8. The battery pack liquid cooling device according to claim 1, characterized in that: The liquid cooling plate (1) is formed by assembling a first assembled plate (101) and a second assembled plate (102).

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