Liquid cooling plate heat dissipation device for heat exchange of battery cell

Abstract

The utility model relates to a liquid cooling plate heat dissipation device for heat exchange of a battery cell, which comprises a current collection area and a convergence area, the current collection area is communicated with the convergence area through a flow channel template, a liquid inlet cavity and a liquid outlet cavity are arranged in the current collection area, a liquid inlet pipe is connected to a liquid inlet position of the liquid inlet cavity, a liquid outlet position of the liquid inlet cavity is communicated with a liquid inlet flow channel of the flow channel template, and a liquid outlet pipe is connected to a liquid outlet position of the flow channel template. The liquid outlet position of the liquid outlet cavity is connected with a liquid outlet pipe, and the liquid inlet position of the liquid outlet cavity is communicated with a liquid outlet flow channel of the flow channel template. According to the scheme, the liquid cooling plate structure for heat exchange of the battery cells is small in temperature difference of cooling liquid in all the areas, reduces flow resistance and energy consumption, improves heat exchange efficiency and is long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery cell heat dissipation technical field especially relates to a kind of liquid cooling plate heat sink of cell heat exchange. BACKGROUND

[0002] Battery energy storage heat management is various, with the integration of energy storage system is higher and higher, the system energy density requirement is also more and more big, the number of single package lithium battery cell is also more and more to derive multi-module series-parallel connection, leading to the size of liquid cooling plate is also increased, blindly increase size leads to the flow resistance of liquid cooling plate is big, liquid cooling heat dissipation effect is poor, the temperature difference of system is also big, influence system heat dissipation effect. How to guarantee the flow resistance of liquid cooling plate unchanged under the condition of size increase, improve heat dissipation performance, reduce temperature difference become the problem that urgently needs to be solved at present. SUMMARY

[0003] The utility model discloses a kind of liquid cooling plate heat sink of cell heat exchange, to provide a kind of each area cooling liquid temperature difference small, reduce flow resistance, reduce energy consumption, improve heat exchange efficiency, long service life heat exchange liquid cooling plate structure, to solve the problem encountered in the above background technology.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] A kind of liquid cooling plate heat sink of cell heat exchange, including current collection area and confluence area, the current collection area is connected with confluence area by flow channel template, the current collection area is equipped with inlet cavity and outlet cavity, inlet cavity inlet is connected with inlet pipe, inlet cavity outlet is connected with the inlet flow channel of flow channel template, outlet cavity outlet is connected with outlet pipe, and inlet cavity inlet is connected with the outlet flow channel of flow channel template.

[0006] In the above scheme, the inlet cavity outlet is connected with the inlet flow channel of flow channel template by inlet uniform distribution hole, and the inlet cavity inlet is connected with the outlet flow channel of flow channel template by outlet uniform distribution hole.

[0007] In the above scheme, the inlet cavity and outlet cavity are integrally fixedly connected, and the inlet cavity is located at the upper portion of the outlet cavity.The shape of the inlet cavity and the shape of the outlet cavity are both long strip structures, and the volume of the inlet cavity and the volume of the outlet cavity are the same.Further, the number of inlet uniform distribution holes is 2-5, and they are arranged side by side, and the number of outlet uniform distribution holes (16) is 2-5, and they are arranged side by side.

[0008] In the above scheme, the confluence area is a hollow long strip structure, and the inner side of the confluence area is connected with the flow channel template through flow uniforming holes.As a preferred scheme, the number of flow uniforming holes is 2-5, and they are arranged side by side.

[0009] In the above scheme, the flow channel template is provided with at least one group, and each group is provided with a liquid inlet flow channel and a liquid outlet flow channel. In implementation, as a preferred scheme, the liquid inlet flow channel is located at one side of the flow channel template, and the liquid outlet flow channel is located at the other side of the flow channel template. In implementation, the liquid inlet flow channel and the liquid outlet flow channel can also be staggered.

[0010] Compared with the prior art, the liquid cooling plate structure for cell heat exchange has the advantages that the temperature difference of cooling liquid in each region is small, the flow resistance is reduced, the energy consumption is reduced, the heat exchange efficiency is improved, and the service life is long. Through the arrangement of the current collection areas of the liquid cooling plate inlet and outlet, and through the arrangement of the liquid inlet equal division holes, the liquid outlet equal division holes and the flow equalization holes, the lateral area of the liquid cooling plate is expanded, the overall pressure drop of the pipeline is reduced, the temperature difference of the cooling liquid in each region is small, the energy consumption is reduced, and the heat dissipation effect of the cooling plate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts. Among them:

[0012] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0013] Figure 2 It is a schematic diagram of the structure of the current collection area in the present application;

[0014] Figure 3 It is a schematic diagram of the position structure of the liquid inlet equal division hole of the current collection area in the present application in the vertical direction;

[0015] Figure 4 It is a schematic diagram of the position structure of the liquid outlet equal division hole of the current collection area in the present application in the vertical direction;

[0016] Figure 5 It is a schematic diagram of the position structure of the liquid inlet equal division hole of the current collection area in the present application in the horizontal direction;

[0017] Figure 6 It is a schematic diagram of the structure of the convergence area in the present application;

[0018] Figure 7 It is a schematic diagram of the flow direction of the cooling liquid in the implementation of the present application;

[0019] Figure 8 It is a schematic diagram of the flow of a flow channel template in the present application;

[0020] Figure 9The flow schematic diagram of parallel connection of two flow channel templates in the utility model.

[0021] Figure 10 The differential pressure schematic diagram of simulating the inlet and outlet liquid flow in the utility model.

[0022] Reference signs in the drawing: 1-collecting area; 11-inlet pipe; 12-outlet pipe; 13-inlet cavity; 14-outlet cavity; 15-inlet uniform distribution hole; 16-outlet uniform distribution hole; 2-converging area; 21-first collecting pipe; 22-second collecting pipe; 3-flow channel template; 31-inlet flow channel; 32-outlet flow channel; 33-flow uniform hole. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model will be further described in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, so they only show the relevant components of the utility model.

[0024] According to the technical scheme of the utility model, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the utility model. Therefore, the following detailed description and drawings are only exemplary description of the technical scheme of the utility model, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the utility model.

[0025] The technical scheme of the utility model will be further described in detail in combination with the drawings and examples.

[0026] Example 1, as shown in Figure 1 and Figure 2 A liquid cooling plate heat dissipation device of battery cell heat exchange, comprising a collecting area 1 and a converging area 2, the collecting area 1 is communicated with the converging area 2 through a flow channel template 3, the cooling liquid enters the flow channel template 3 from the collecting area 1, then reaches the converging area 2, finally flows into the flow channel template 3 from the converging area 2, and the cooling liquid after heat exchange flows out from the collecting area 1. Please refer to Figure 7 , the large surface of the battery cell is parallel to the outside of the flow channel template 3, and exchanges heat with the temperature generated by the battery cell when working.

[0027] Specifically, the collecting area 1 is provided with an inlet cavity 13 and an outlet cavity 14, the inlet cavity 13 is connected with an inlet pipe 11 at the inlet position, the outlet position of the inlet cavity 13 is communicated with the inlet flow channel 31 of the flow channel template 3, the outlet cavity 14 is connected with an outlet pipe 12 at the outlet position, and the inlet position of the outlet cavity 14 is communicated with the outlet flow channel 32 of the flow channel template 3. That is to say, the flow channel template 3 is divided into the inlet flow channel 31 and the outlet flow channel 32, the cooling water enters the inlet flow channel 31 through the inlet pipe 11, the cooling water after heat exchange flows into the outlet flow channel 32 and then flows into the outlet cavity 14, and finally flows out from the outlet pipe 12, so that the circulation of the cooling water is realized.

[0028] In the embodiment 1, the inlet cavity 13 and the outlet cavity 14 are integrally fixedly connected, and the inlet cavity 13 is located at the upper portion of the outlet cavity 14. Figure 3 and Figure 4 Further, the outlet position of the inlet cavity 13 is communicated with the inlet flow channel 31 of the flow channel template 3 through an inlet uniform distribution hole 15, and the inlet position of the outlet cavity 14 is communicated with the outlet flow channel 32 of the flow channel template 3 through an outlet uniform distribution hole 16.

[0029] As a preferred solution, the inlet cavity 13 and the outlet cavity 14 are integrally fixedly connected, and the inlet cavity 13 is located at the upper portion of the outlet cavity 14. Since the inlet cavity 13 is located at the upper portion of the outlet cavity 14, the inlet uniform distribution hole 15 should be vertically arranged, and the outlet uniform distribution hole 16 should be horizontally arranged, so as to facilitate the inlet and outlet of the liquid. The inlet cavity 13 can be wider than the outlet cavity 14, so that the arrangement of the inlet uniform distribution hole 15 is facilitated.

[0030] The shape of the inlet cavity 13 and the shape of the outlet cavity 14 are both long strip structures, the volume of the inlet cavity 13 is the same as the volume of the outlet cavity 14, and the balance of the inlet and outlet flow can be realized. In the implementation, the number of the inlet uniform distribution holes 15 is 2-5 and they are arranged side by side, and the number of the outlet uniform distribution holes 16 is 2-5 and they are arranged side by side. The number of the inlet uniform distribution holes 15 can be set to 3, so as to reduce the flow resistance, and the number of the outlet uniform distribution holes 16 can also be set to 3, so as to reduce the flow resistance.

[0031] In the embodiment 1 or 2, the inlet cavity 13 and the outlet cavity 14 are integrally fixedly connected, and the inlet cavity 13 is located at the upper portion of the outlet cavity 14. Figure 1 and Figure 6 The converging area 2 is a hollow long strip structure, and a hollow long strip plate body can be used as the converging area 2. The inner side of the converging area 2 is communicated with the flow channel template 3 through a flow uniform hole 33, and the design of the flow uniform hole 33 avoids the large flow resistance caused by one hole. As a preferred solution, the number of the flow uniform holes 33 is 2-5 and they are arranged side by side, and preferably three flow uniform holes 33 are arranged side by side, which are used as inlet and outlet holes for heat exchange on the inlet flow channel 31 or the outlet flow channel 32, so as to reduce the flow resistance.

[0032] The flow channel template 3 is provided with at least one group, and each group is provided with the inlet flow channel 31 and the outlet flow channel 32.Figure 5 and Figure 7 The flow channel template 3 in the scheme sets two groups, in each group, the liquid inlet flow channel 31 is located at one side of the flow channel template 3, and the liquid outlet flow channel 32 is located at the other side of the flow channel template 3, that is, the cooling liquid flows from the liquid inlet flow channel 31 at one side of the flow channel template 3 to the flow channel convergence area 2, and then flows from the convergence area 2 to the liquid outlet flow channel 32 at the other side of the flow channel template 3.

[0033] In addition, the liquid inlet flow channel 31 and the liquid outlet flow channel 32 can also be arranged as follows: the liquid inlet flow channel 31 and the liquid outlet flow channel 32 are staggered in each group of flow channel templates 3, that is, if the first one is the liquid inlet flow channel 31, the second one is the liquid outlet flow channel 32, the third one continues to be the liquid inlet flow channel 31, and the fourth one is the liquid outlet flow channel 32, and so on. Figure 7 No matter the liquid inlet flow channel 31 or the liquid outlet flow channel 32, the battery placed outside the flow channel template 3 can be heat-exchanged, thereby playing a role in cooling.

[0034] Please refer to Figure 8 to Figure 10 , Figure 8 It is a flow diagram using only one group of flow channel templates 3, and only one group of flow channel templates 3 can be connected in series on one side of the current collection area 1. Figure 9 It is a flow diagram using two groups of flow channel templates 3, and two groups of flow channel templates 3 can be connected in parallel on one side of the current collection area 1. Figure 10 It is a differential pressure diagram for simulating the inlet and outlet liquid flow of the utility model, and through simulation experiments, it is known that the pressure drop is 5.52 Kpa, and the flow is 10 L / min, and the flow deviation of the branch connected in parallel and in series is about 10%.

[0035] The scheme aims to provide a liquid cooling plate structure for battery heat exchange, which has small temperature difference of cooling liquid in each region, reduces flow resistance, reduces energy consumption, improves heat exchange efficiency, and has long service life. By arranging the current collection area 1 of the liquid cooling plate inlet and outlet up and down, and by arranging the liquid inlet equal division hole 15, the liquid outlet equal division hole 16 and the flow equalization hole 33, the lateral area expansion of the liquid cooling plate is realized, the overall pressure drop of the pipeline is reduced, the temperature difference of the cooling liquid in each region is small, the energy consumption is reduced, and the heat dissipation effect of the cooling plate is improved.

[0036] The above specific embodiments further specifically describe the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above description is only a specific embodiment of the utility model, and is not used to limit the protection scope of the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A liquid cooling plate heat dissipation device for an electric cell heat exchange, characterized in that: It includes a flow collection area (1) and a convergence area (2), the flow collection area (1) is communicated with the convergence area (2) through a flow channel template (3), the flow collection area (1) is provided with a liquid inlet cavity (13) and a liquid outlet cavity (14), the liquid inlet cavity (13) is connected with a liquid inlet pipe (11) at the liquid inlet position, the liquid inlet cavity (13) is communicated with the liquid inlet flow channel (31) of the flow channel template (3) at the liquid outlet position, the liquid outlet cavity (14) is connected with a liquid outlet pipe (12) at the liquid outlet position, and the liquid outlet cavity (14) is communicated with the liquid outlet flow channel (32) of the flow channel template (3) at the liquid inlet position.

2. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 1, characterized in that: The liquid inlet cavity (13) is communicated with the liquid inlet flow channel (31) of the flow channel template (3) through a liquid inlet equal division hole (15), and the liquid outlet cavity (14) is communicated with the liquid outlet flow channel (32) of the flow channel template (3) through a liquid outlet equal division hole (16).

3. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 2, characterized in that: The liquid inlet cavity (13) and the liquid outlet cavity (14) are integrally fixedly connected, and the liquid inlet cavity (13) is located at the upper portion of the liquid outlet cavity (14).

4. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 2, characterized in that: The shape of the liquid inlet cavity (13) and the shape of the liquid outlet cavity (14) are both long strip structures, and the volume of the liquid inlet cavity (13) and the volume of the liquid outlet cavity (14) are the same.

5. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 2, characterized in that: The number of the liquid inlet equal division holes (15) is 2-5, and the liquid inlet equal division holes (15) are arranged side by side, and the number of the liquid outlet equal division holes (16) is 2-5, and the liquid outlet equal division holes (16) are arranged side by side.

6. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 1, characterized in that: The convergence area (2) is a hollow long strip structure, and the inner side of the convergence area (2) is communicated with the flow channel template (3) through a flow equalization hole (33).

7. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 6, characterized in that: The number of the flow equalization holes (33) is 2-5, and the flow equalization holes (33) are arranged side by side.

8. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 1, characterized in that: The flow channel template (3) is provided with at least one group, and each group is provided with a liquid inlet flow channel (31) and a liquid outlet flow channel (32) on the upper surface.

9. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 8, characterized in that: The liquid inlet flow channel (31) is located on one side of the flow channel template (3), and the liquid outlet flow channel (32) is located on the other side of the flow channel template (3).

10. The liquid cooling plate heat dissipation device of the battery cell heat exchange according to claim 8, characterized in that: The liquid inlet flow channel (31) and the liquid outlet flow channel (32) are staggered.

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