Liquid cooling plate heat dissipation device of liquid cooling energy storage system

Abstract

The utility model discloses a liquid cooling plate heat dissipation device of a liquid cooling energy storage system. The liquid cooling plate heat dissipation device comprises a plurality of battery core bodies, a plurality of liquid cooling plates, a main water inlet pipeline and a main water outlet pipeline, one liquid cooling plate is fixedly mounted between every two rows of adjacent battery core bodies, and one liquid cooling plate is fixedly mounted on the outer surface of the battery core body on the outermost side; each liquid cooling plate is a liquid cooling plate with a plurality of groups of parallel liquid cooling pipeline groups; each liquid cooling plate comprises a plurality of liquid cooling pipeline groups, a first liquid cooling plate inlet collecting pipe, a first liquid cooling plate outlet collecting pipe and a metal plate, and the plurality of liquid cooling pipeline groups are formed in the metal plate in parallel; the first liquid cooling plate inlet collecting pipe is provided with a first liquid cooling plate; a main water outlet is formed in the first liquid cooling plate outlet collecting pipe; each main water inlet is connected with a main water inlet pipeline; each main water outlet is connected with a main water outlet pipeline; a water inlet of each liquid cooling pipeline group is connected with an inlet collecting pipe of the first liquid cooling plate; and the water outlet of each liquid cooling pipeline group is connected with the first liquid cooling plate outlet collecting pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy storage technology, and in particular to a liquid cooling plate heat dissipation device of a liquid cooling energy storage system. Background Art

[0002] As the global energy crisis and environmental pollution become increasingly severe, and people's demand for electricity is getting higher and higher, new energy has entered a rapid development, especially the development of new energy batteries. At present, new energy batteries are widely used in the field of energy storage and new energy vehicles. Lithium batteries have the advantages of high energy density, low self-discharge, excellent cycle performance, long service life and wide operating temperature range. In the process of using lithium batteries, due to the fact that lithium batteries will generate a certain degree of heat during charging and discharging, the battery temperature will rise, which will shorten the service life of the battery. In addition, when many batteries are used in series, there will be a certain temperature difference, which will reduce the efficiency of the battery.

[0003] See also Figure 1 , Figure 2 The internal flow channel of the liquid cooling plate in the prior art is in a straight line structure, and the coolant enters from one end of the cold plate and flows out from the other end of the cold plate. It can be seen that the internal flow channel of the liquid cooling plate in the prior art is too simple, and the contact area between the liquid cooling plate and the battery cell is small, so the heat exchange effect between the liquid cooling plate and the battery cell is poor, which will lead to a large temperature difference between the battery cores of the battery modules, thereby shortening the service life of the battery pack. Utility Model Content

[0004] The purpose of the present application is to provide a liquid cooling plate heat dissipation device for a liquid cooling energy storage system in order to address the technical defects existing in the prior art.

[0005] The technical solution adopted to achieve the purpose of this application is:

[0006] A liquid cooling plate heat dissipation device of a liquid cooling energy storage system, comprising a plurality of battery cores, a plurality of liquid cooling plates, a main water inlet pipe and a main water outlet pipe;

[0007] A plurality of battery cells are arranged in a matrix, a liquid cooling plate is fixedly installed between every two adjacent rows of battery cells, and a liquid cooling plate is fixedly installed on the outer surface of the outermost battery cell;

[0008] Each liquid cooling plate is a liquid cooling plate with multiple groups of liquid cooling pipes in parallel; each liquid cooling plate includes multiple groups of liquid cooling pipes, a first liquid cooling plate inlet manifold, a first liquid cooling plate outlet manifold and a metal plate, multiple groups of liquid cooling pipes are formed in parallel in the metal plate, and the metal plate is fixedly mounted on the outer surface of the battery core; a total water inlet for passing the coolant into the first liquid cooling plate inlet manifold is formed on the first liquid cooling plate inlet manifold; a total water outlet for discharging the coolant after heat exchange with the battery core is formed on the first liquid cooling plate outlet manifold;

[0009] Each total water inlet is respectively connected to the total water inlet pipeline through a connecting fitting; each total water outlet is respectively connected to the total water outlet pipeline through a connecting fitting.

[0010] The water inlet of each liquid cooling pipeline group is connected to the first liquid cooling plate inlet manifold; the water outlet of each liquid cooling pipeline group is connected to the first liquid cooling plate outlet manifold.

[0011] In the above technical solution, the liquid cooling plate is bonded to the battery core through an adhesive.

[0012] In the above technical solution, each liquid cooling pipeline group is an S-shaped liquid cooling pipeline group; the number of the liquid cooling pipeline groups is 3.

[0013] In the above technical solution, each liquid cooling pipeline group is a liquid cooling pipeline group with multiple pipelines in parallel; each liquid cooling pipeline group includes multiple rows of first pipelines, multiple rows of second pipelines, and multiple rows of third pipelines. One end of the first pipeline is connected to the first liquid cooling plate inlet manifold, and one end of the third pipeline is connected to the first liquid cooling plate outlet manifold.

[0014] In the above technical solution, the number of the first pipelines, second pipelines, and third pipelines is 3.

[0015] In the above technical solution, a plurality of first conversion cavities, a plurality of second conversion cavities, a plurality of water inlet cavities, and a plurality of water outlet cavities are formed in the metal plate. The first conversion cavity is located at the other end of the first pipeline and one end of the second pipeline; the second conversion cavity is located at the other end of the second pipeline and the other end of the third pipeline; the water inlet cavity is located at one end of the first pipeline and is connected to the first liquid cooling plate inlet manifold; the water outlet cavity is located at one end of the third pipeline and is connected to the first liquid cooling plate outlet manifold.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The liquid cooling pipeline group of the liquid cooling plate of the present utility model is S-shaped. Compared with the prior art, the coolant flows more fully in the S-shaped liquid cooling pipeline group, the temperature uniformity of the battery core is improved, and the service life of the battery pack can be increased.

[0018] 2. Compared with the existing liquid cooling pipeline group, the S-shaped liquid cooling pipeline group of the present utility model has a change in the flow channel structure. The coolant no longer flows straight through the liquid cooling pipeline group but adds bends, so the flow resistance increases.

[0019] 3. The liquid cooling pipeline group of the present utility model is a liquid cooling pipeline group with multiple pipelines in parallel, which can make the contact area between the liquid cooling plate and the battery core larger. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic vertical cross-sectional structure diagram of a liquid cooling plate in the prior art.

[0022] Figure 2 It is a schematic structural diagram of a liquid cooling plate heat dissipation device in the prior art.

[0023] Figure 3 It is a schematic structural diagram of a liquid cooling plate heat dissipation device of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a liquid cooling plate of the present invention.

[0025] Figure 5 It is a schematic diagram of the flow direction of the coolant inside the S-shaped liquid cooling plate of the present invention

[0026] Figure 6 It is a temperature contour map of a battery pack in the prior art.

[0027] Figure 7 It is a velocity contour map of the internal flow channels of a liquid cooling plate in the prior art.

[0028] Figure 8 It is a temperature contour map of a battery pack of the present invention.

[0029] Figure 9 It is a velocity contour map of the internal flow channels of the liquid cooling plate of the present invention.

[0030] In the figure: 1 - battery cell, 2 - liquid cooling plate, 2-1 - liquid cooling pipe group, 2-1-1 - water inlet, 2-1-2 - water outlet, 2-1-3 - first pipe, 2-1-4 - second pipe, 2-1-5 - third pipe, 2-2 - first liquid cooling plate inlet manifold, 2-3 - first liquid cooling plate outlet manifold, 2-4 - metal plate, 2-4-1 - first conversion cavity, 2-4-2 - second conversion cavity, 2-4-3 - water inlet cavity, 2-4-4 - water outlet cavity, 2-5 - total water inlet, 2-6 - total water outlet, 3 - total water inlet pipe, 4 - total water outlet pipe, 5 - connecting fitting. Detailed implementation manners

[0031] In order to enable those in the technical field to better understand the solution of the present invention, the following further illustrates the technical solution of the present invention in combination with specific embodiments.

[0032] A liquid cooling plate heat dissipation device for a liquid-cooled energy storage system, see Figure 3 , Figure 4 , Figure 5 , which includes multiple battery cores 1, multiple liquid cooling plates 2, a total inlet pipe 3, and a total outlet pipe 4.

[0033] The multiple battery cores 1 are arranged in a matrix. A liquid cooling plate 2 is fixedly installed between every two adjacent columns of battery cores 1, and a liquid cooling plate 2 is fixedly installed on the outer surface of the outermost battery core 1 for heat exchange and cooling of the battery cores 1. Among them, the liquid cooling plate 2 is bonded to the battery core 1 through an adhesive.

[0034] Each liquid cooling plate 2 is a liquid cooling plate with multiple groups of liquid cooling pipe groups in parallel; each liquid cooling plate 2 includes multiple groups of liquid cooling pipe groups 2-1, a first liquid cooling plate inlet manifold 2-2, a first liquid cooling plate outlet manifold 2-3, and a metal plate 2-4. The multiple groups of liquid cooling pipe groups 2-1 are arranged side by side within the metal plate 2-4. The metal plate 2-4 is fixedly installed on the outer surface of the battery core 1 to enable the coolant to flow within the liquid cooling pipe group 2-1 and conduct heat exchange with the battery core 1 for cooling; a total inlet 2-5 is formed on the first liquid cooling plate inlet manifold 2-2 for introducing the coolant into the first liquid cooling plate inlet manifold 2-2; a total outlet 2-6 is formed on the first liquid cooling plate outlet manifold 2-3 for discharging the coolant that has exchanged heat with the battery core 1. Among them, each group of liquid cooling pipe groups 2-1 is an S-shaped liquid cooling pipe group; the number of the liquid cooling pipe groups 2-1 is preferably 3.

[0035] Each total inlet 2-5 is respectively connected to the total inlet pipe 3 through a connecting fitting 5 for introducing the coolant in the total inlet pipe 3 into each liquid cooling plate 2 to conduct heat exchange with the battery core; each total outlet 2-6 is respectively connected to the total outlet pipe 4 through a connecting fitting 5 for discharging the coolant that has exchanged heat with the battery core in each liquid cooling plate 2 into the total outlet pipe 4 and discharging it through the total outlet pipe 4. Among them, the connecting fitting 5 is an L-shaped connecting fitting.

[0036] The inlet 2-1-1 of each group of liquid cooling pipe groups 2-1 is connected to the first liquid cooling plate inlet manifold 2-2 for introducing the coolant in the first liquid cooling plate inlet manifold 2-2 into the liquid cooling pipe group 2-1 to conduct heat exchange with the battery core 1; the outlet 2-1-2 of each group of liquid cooling pipe groups 2-1 is connected to the first liquid cooling plate outlet manifold 2-3 for discharging the coolant that has exchanged heat with the battery core 1 into the first liquid cooling plate outlet manifold 2-3 and discharging it through the total outlet 2-6.

[0037] Each liquid cooling pipe group 2-1 is a liquid cooling pipe group with multiple pipes in parallel; each liquid cooling pipe group 2-1 includes multiple rows of first pipes 2-1-3, multiple rows of second pipes 2-1-4, and multiple rows of third pipes 2-1-5. Among them, the number of the first pipes 2-1-3, the second pipes 2-1-4, and the third pipes 2-1-5 is preferably 3. One end of the first pipe 2-1-3 is connected to the first liquid cooling plate inlet manifold 2-2, and is used to introduce the coolant in the first liquid cooling plate inlet manifold 2-2 into the first pipe 2-1-3, then introduce it into the second pipe 2-1-4 from the first pipe 2-1-3, and then introduce it into the third pipe 2-1-5 from the second pipe 2-1-4; one end of the third pipe 2-1-5 is connected to the first liquid cooling plate outlet manifold 2-3, and is used to discharge the coolant that has exchanged heat with the battery cell 1 in the third pipe 2-1-5 into the first liquid cooling plate outlet manifold 2-3, and discharge it through the total water outlet 2-6.

[0038] Further, a plurality of first conversion cavities 2-4-1, a plurality of second conversion cavities 2-4-2, a plurality of water inlet cavities 2-4-3, and a plurality of water outlet cavities 2-4-4 are formed in the metal plate 2-4. The first conversion cavity 2-4-1 is located at the other end of the first pipe 2-1-3 and one end of the second pipe 2-1-4, and is used to introduce the coolant flowing out of the first pipe 2-1-3 into the second pipe 2-1-4; the second conversion cavity 2-4-2 is located at the other end of the second pipe 2-1-4 and the other end of the third pipe 2-1-5, and is used to introduce the coolant of the second pipe 2-1-4 into the third pipe 2-1-5. The water inlet cavity 2-4-3 is located at one end of the first pipe 2-1-3 and is connected to the first liquid cooling plate inlet manifold 2-2, and is used to make the coolant in the first liquid cooling plate inlet manifold 2-2 flow into the first pipe 2-1-3 through the water inlet cavity 2-4-3; the water outlet cavity 2-4-4 is located at one end of the third pipe 2-1-5 and is connected to the first liquid cooling plate outlet manifold 2-3, and is used to introduce the coolant that has exchanged heat with the battery cell 1 in the third pipe 2-1-5 into the first liquid cooling plate outlet manifold 2-3.

[0039] A liquid cooling plate heat dissipation method for a liquid cooling energy storage system includes the following steps:

[0040] Step 1, introduce coolant into the total water inlet pipe 3. The coolant in the total water inlet pipe 3 enters the first liquid cooling plate inlet manifold 2-2 from the total water inlet 2-5 of each liquid cooling plate 2 through the connecting fitting 5. The coolant in the first liquid cooling plate inlet manifold 2-2 enters the water inlet cavity 2-4-3 from the water inlet 2-1-1 and is introduced into the first pipe 2-1-3;

[0041] Step 2, the coolant in the first pipeline 2-1-3 enters the second pipeline 2-1-4 through the first conversion chamber 2-4-1, and the coolant in the second pipeline 2-1-4 enters the third pipeline 2-1-5 through the second conversion chamber 2-4-2;

[0042] Step 3, the coolant that has exchanged heat with the battery core 1 in the third pipeline 2-1-5 enters the water outlet chamber 2-4-4 and converges into the first liquid cooling plate outlet manifold 2-3. The coolant that has exchanged heat with the battery core 1 in the first liquid cooling plate outlet manifold 2-3 is discharged into the total water outlet pipeline 4 from the total water outlet 2-6 through the connecting fitting 5, and is discharged through the total water outlet pipeline 4.

[0043] See Figures 6 - 9 , through simulation, the highest temperature, the lowest temperature, the maximum temperature difference of the battery core of the liquid cooling plate heat dissipation device based on the prior art, the total flow resistance of the liquid cooling plate pipe circuit, and the highest temperature, the lowest temperature, the maximum temperature difference of the battery core of the liquid cooling plate heat dissipation device of this embodiment, and the total flow resistance of the liquid cooling plate pipe circuit are obtained. Among them, the highest temperature of the battery core of the prior art is 25.7 °C, the lowest temperature is 22.1 °C, the maximum temperature difference is 3.6 °C, and the total flow resistance of the liquid cooling plate pipe circuit is 7 KPa; the highest temperature of the battery core of this embodiment is 22.9 °C, the lowest temperature is 21.8 °C, the maximum temperature difference is 1.1 °C, and the total flow resistance of the liquid cooling plate pipe circuit is 15 KPa. Compared with the battery core of the liquid cooling plate heat dissipation device based on the prior art, the highest temperature of the battery core of this embodiment is reduced by 2.8 °C, the lowest temperature is reduced by 0.3 °C, and the maximum temperature difference is also optimized and reduced by 2.5 °C. The total flow resistance of the liquid cooling plate pipe circuit increases by 8 KPa. The increase in the total flow resistance of the liquid cooling plate pipe circuit is due to the change in the flow channel structure. The coolant no longer flows straight through the liquid cooling pipe group but adds bends, so the flow resistance increases.

[0044] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right", etc. are used in the embodiments to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0045] Moreover, relative relationship terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0046] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A liquid cooling plate heat dissipation device for a liquid cooling energy storage system, characterized in that: It includes multiple battery cells, multiple liquid cooling plates, a main water inlet pipe and a main water outlet pipe; A plurality of battery cells are arranged in a matrix, a liquid cooling plate is fixedly installed between every two adjacent rows of battery cells, and a liquid cooling plate is fixedly installed on the outer surface of the outermost battery cell; Each liquid cooling plate is a liquid cooling plate with multiple groups of liquid cooling pipes in parallel; each liquid cooling plate includes multiple groups of liquid cooling pipes, a first liquid cooling plate inlet manifold, a first liquid cooling plate outlet manifold and a metal plate, multiple groups of liquid cooling pipes are formed in parallel in the metal plate, and the metal plate is fixedly mounted on the outer surface of the battery core; a total water inlet for passing the coolant into the first liquid cooling plate inlet manifold is formed on the first liquid cooling plate inlet manifold; a total water outlet for discharging the coolant after heat exchange with the battery core is formed on the first liquid cooling plate outlet manifold; Each main water inlet is connected to the main water inlet pipeline through a connecting pipe; each main water outlet is connected to the main water outlet pipeline through a connecting pipe; The water inlet of each group of liquid cooling pipe groups is connected to the first liquid cooling plate inlet manifold; the water outlet of each group of liquid cooling pipe groups is connected to the first liquid cooling plate outlet manifold.

2. The liquid cooling plate heat dissipation device according to claim 1, characterized in that: The liquid cooling plate is bonded to the battery core by adhesive.

3. The liquid cooling plate heat dissipation device according to claim 1, characterized in that: Each group of liquid cooling pipe groups is an S-shaped liquid cooling pipe group; the number of the liquid cooling pipe groups is 3.

4. The liquid cooling plate heat dissipation device according to claim 1, characterized in that: Each group of liquid cooling pipe groups is a liquid cooling pipe group with multiple pipes in parallel; each group of liquid cooling pipe groups includes multiple rows of first pipes, multiple rows of second pipes and multiple rows of third pipes, one end of the first pipe is connected to the first liquid cooling plate inlet manifold, and one end of the third pipe is connected to the first liquid cooling plate outlet manifold.

5. The liquid cooling plate heat dissipation device according to claim 4, characterized in that: The number of the first pipeline, the second pipeline and the third pipeline is 3.

6. The liquid cooling plate heat dissipation device according to claim 1, characterized in that: A plurality of first conversion chambers, a plurality of second conversion chambers, a plurality of water inlet chambers and a plurality of water outlet chambers are formed in the metal plate, wherein the first conversion chamber is located at the other end of the first pipe and one end of the second pipe; the second conversion chamber is located at the other end of the second pipe and the other end of the third pipe; the water inlet chamber is located at one end of the first pipe and is connected to the inlet manifold of the first liquid cooling plate; the water outlet chamber is located at one end of the third pipe and is connected to the outlet manifold of the first liquid cooling plate.

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