Coolant flow distribution liquid cooling plate

Abstract

Disclosed in the present utility model is a coolant flow distribution liquid cooling plate, comprising: a liquid cooling plate, wherein the liquid cooling plate is provided with at least two liquid cooling regions, and the at least two liquid cooling areas have different heat exchange area; a flow distribution pipe fitting which is connected between a coolant inlet pipe and the liquid cooling plate and is used for carrying out flow distribution on the coolant on the basis of the ratio of the heat exchange area of the at least two liquid cooling regions; and a flow convergence pipe fitting which is connected between a coolant outlet pipe and the liquid cooling plate and is used for converging the coolant in the at least two liquid cooling regions and discharging same to the coolant outlet pipe. For a battery pack with imbalanced matching of multiple liquid cooling areas on a liquid cooling plate, the liquid cooling plate adopts an inlet flow distribution design, the coolant flow volume is distributed on the basis of the matching ratio of the multiple liquid cooling areas, making the matching ratio of the multiple liquid cooling areas consistent with the coolant flow distribution ratio, achieving the reasonability of coolant flow distribution, and meeting the thermal management performance requirements of a battery pack.

Description

A coolant flow distribution type liquid cooling plate Technical Field

[0001] The utility model relates to a coolant flow distribution type liquid cooling plate, belonging to the technical field of liquid cooling plates for battery packs of electric vehicles. Background Art

[0002] At present, electric vehicles are developing rapidly, and the thermal management of battery packs is very important in battery design. The thermal management performance of battery packs has a very important impact on battery performance, battery life, and battery safety.

[0003] The battery pack liquid cooling plate is a key component for heat dissipation. The temperature difference between battery cells has a crucial impact on battery performance and cycle life. Currently, most liquid cooling plates in the industry have single-inlet and single-outlet configurations. For battery packs with unbalanced liquid cooling areas, it is difficult for these single-inlet and single-outlet cooling plates to adjust the coolant flow distribution to meet the thermal management performance requirements of the battery pack.

[0004] Utility Model Content

[0005] The purpose of the utility model is to provide a coolant flow distribution liquid cooling plate. For battery packs with uneven grouping of multiple liquid cooling areas on the liquid cooling plate, the liquid cooling plate adopts an inlet diversion design to distribute the coolant flow according to the grouping ratio of multiple liquid cooling areas, so that the grouping ratio of multiple liquid cooling areas is consistent with the coolant flow distribution ratio, thereby achieving the rationality of coolant flow distribution and meeting the thermal management performance requirements of the battery pack.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A coolant flow distribution type liquid cooling plate, comprising:

[0008] A liquid cooling plate, wherein the liquid cooling plate has at least two liquid cooling regions, and the heat exchange areas of the at least two liquid cooling regions are different;

[0009] A flow distribution pipe is connected between the coolant inlet pipe and the liquid cooling plate, and is used to distribute the coolant flow according to the ratio of the heat exchange area of ​​at least two liquid cooling areas;

[0010] The confluence pipe is connected between the coolant outlet pipe and the liquid cooling plate and is used to collect and discharge the coolant in at least two liquid cooling areas to the coolant outlet pipe.

[0011] As a preferred embodiment of the present invention, the liquid cooling plate has two liquid cooling areas, and the heat exchange areas of the two liquid cooling areas are different;

[0012] The diverter pipe is a diverter tee, which has a diverter inlet end and two diverter outlet ends, wherein the diverter inlet end is connected to the coolant inlet pipe, and the two diverter outlet ends are respectively connected to the inlets of the two liquid cooling areas;

[0013] The confluence pipe is a confluence tee, which has two confluence inlet ends and one confluence outlet end. The two confluence inlet ends are respectively connected to the outlets of the two liquid cooling areas, and the confluence outlet end is connected to the coolant outlet pipe.

[0014] As a preferred embodiment of the present invention, the two diversion outlet ends have different inner diameters. The diversion outlet end with a larger inner diameter is connected to the inlet of the liquid cooling area with a larger heat exchange area, and the diversion outlet end with a smaller inner diameter is connected to the inlet of the liquid cooling area with a smaller heat exchange area.

[0015] As a preferred embodiment of the present invention, the two diversion outlet ends are respectively connected to the inlets of the two liquid cooling areas through diversion connecting pipes.

[0016] As a preferred embodiment of the present invention, the two converging inlet ends are respectively connected to the outlets of the two liquid cooling areas through converging connecting pipes.

[0017] The utility model is beneficial in that:

[0018] To address battery packs with uneven distribution of multiple liquid cooling areas on the liquid cooling plate, the liquid cooling plate adopts an inlet diversion design to distribute the coolant flow according to the distribution ratio of multiple liquid cooling areas, so that the distribution ratio of multiple liquid cooling areas is consistent with the coolant flow distribution ratio, achieving the rationality of coolant flow distribution to meet the thermal management performance requirements of the battery pack; thereby, it can reduce the temperature difference of the battery pack cells, improve battery performance, extend battery life, and ensure battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the utility model;

[0020] The meaning of the reference numerals in the figure: 1-liquid cooling area, 11-liquid cooling area on the left, 12-liquid cooling area on the right; 2-cooling liquid inlet pipe, 3-cooling liquid outlet pipe, 4-diversion tee pipe, 5-merging tee pipe; 6-diversion connecting pipe, 7-merging connecting pipe. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] This embodiment is a liquid cooling plate with a cooling liquid flow distribution type, comprising:

[0023] A liquid cooling plate, wherein the liquid cooling plate has at least two liquid cooling regions 1, and the heat exchange areas of the at least two liquid cooling regions 1 are different;

[0024] A flow distribution pipe is connected between the coolant inlet pipe 2 and the liquid cooling plate, and is used to distribute the coolant flow according to the ratio of the heat exchange area of ​​at least two liquid cooling areas 1;

[0025] The confluence pipe is connected between the coolant outlet pipe 3 and the liquid cooling plate, and is used to collect and discharge the coolant in at least two liquid cooling areas 1 to the coolant outlet pipe 3 .

[0026] As shown in FIG1 , this embodiment takes the liquid cooling plate having two liquid cooling areas 1 as an example, and the heat exchange areas of the two liquid cooling areas 1 are different;

[0027] The diverter pipe is a diverter tee 4 having a diverter inlet and two diverter outlets. The diverter inlet is connected to the coolant inlet pipe 2, and the two diverter outlets are connected to the inlets of the two liquid-cooling areas 1, respectively. The diverter tee 4 is used to distribute the coolant flow according to the ratio of the heat exchange areas of the two liquid-cooling areas 1.

[0028] The converging pipe fitting is a converging tee 5, which has two converging inlet ends and one converging outlet end. The two converging inlet ends are respectively connected to the outlets of the two liquid cooling areas 1, and the converging outlet end is connected to the coolant outlet pipe 3; the converging tee 5 is used to collect and discharge the coolant in the two liquid cooling areas 1 to the coolant outlet pipe 3.

[0029] In this embodiment, the inner diameters of the two diversion outlet ends of the diversion tee pipe 4 are different. The diversion outlet end with a larger inner diameter is connected to the inlet of the liquid cooling area 1 with a large heat exchange area, and the diversion outlet end with a smaller inner diameter is connected to the inlet of the liquid cooling area 1 with a small heat exchange area; the two diversion outlet ends are respectively connected to the inlets of the two liquid cooling areas 1 through the diversion connecting pipes 6.

[0030] In this embodiment, the two converging inlet ends of the converging tee pipe 5 are respectively connected to the outlets of the two liquid cooling areas 1 through the converging connecting pipes 7 .

[0031] As shown in Figure 1, in this embodiment, the liquid cooling plate is divided into two liquid cooling areas 1 on the left and right. Due to the battery pack assembly scheme, the number of battery cells on the left and right sides of the battery pack is different. The number of battery cells on the left side of the battery pack accounts for 60% of the entire battery pack, and the number of battery cells on the right side of the battery pack accounts for 40% of the entire battery pack. Therefore, the heat exchange area of ​​the left and right liquid cooling areas 1 of the liquid cooling plate is changed according to the different number of battery cells on the left and right sides of the battery pack. Therefore, the heat exchange area of ​​the left liquid cooling area 11 is larger than the heat exchange area of ​​the right liquid cooling area 12. The cooling liquid flow required for the liquid cooling area 11 on the left side of the liquid cooling plate needs to account for 60% of the total cooling liquid flow, and the cooling liquid flow required for the liquid cooling area 12 on the right side of the liquid cooling plate needs to account for 40% of the total cooling liquid flow.

[0032] Therefore, in this embodiment, a diversion tee 4 is added to the coolant inlet pipe 2 to distribute the coolant flow, distributing 60% of the total coolant flow to the left liquid cooling area 11 and 40% to the right liquid cooling area 12. The coolant flowing through the left liquid cooling area 11 and the right liquid cooling area 12 is finally discharged to the coolant outlet pipe 3 through the converging tee 5, thereby achieving the rationality of coolant distribution to meet the thermal management performance requirements of the battery pack.

[0033] This embodiment aims at battery packs with unbalanced grouping of the two liquid cooling areas on the liquid cooling plate. The liquid cooling plate adopts an inlet diversion design to distribute the coolant flow according to the grouping ratio of the two liquid cooling areas, so that the grouping ratio of the two liquid cooling areas is consistent with the coolant flow distribution ratio, thereby achieving the rationality of the coolant flow distribution to meet the thermal management performance requirements of the battery pack; thereby, the temperature difference of the battery pack cells can be reduced, the battery performance can be improved, the battery life can be extended, and the battery safety can be ensured.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that: unless otherwise clearly stipulated and limited, the terms "install", "connect", "set", and "form" should be understood in a broad sense; for example: it can be a fixed connection, setting, or a detachable connection, setting, or an integrated structure; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements; for those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] In the description of the present invention, reference to terms such as "embodiment", "specific example" or "practical application" means that the specific features, structures, materials or characteristics described in combination with the embodiment are included in at least one embodiment or example of the present invention; the schematic expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. A liquid cooling plate with coolant flow distribution, characterized in that, Comprising: A liquid cooling plate having at least two liquid cooling regions with different heat exchange areas; A flow splitting pipe fitting connected between the coolant inlet pipe and the liquid cooling plate and used for distributing the coolant flow according to the proportion of the heat exchange areas of at least two liquid cooling regions; A flow collecting pipe fitting connected between the coolant outlet pipe and the liquid cooling plate and used for collecting the coolant in at least two liquid cooling regions and discharging it to the coolant outlet pipe.

2. The liquid cooling plate with coolant flow distribution according to claim 1, characterized in that, The liquid cooling plate has two liquid cooling regions with different heat exchange areas; The flow splitting pipe fitting is a flow splitting tee. The flow splitting tee has one flow splitting inlet end and two flow splitting outlet ends. The flow splitting inlet end is communicated with the coolant inlet pipe, and the two flow splitting outlet ends are respectively communicated with the inlets of the two liquid cooling regions; The flow collecting pipe fitting is a flow collecting tee. The flow collecting tee has two flow collecting inlet ends and one flow collecting outlet end. The two flow collecting inlet ends are respectively communicated with the outlets of the two liquid cooling regions, and the flow collecting outlet end is communicated with the coolant outlet pipe.

3. The liquid cooling plate with coolant flow distribution according to claim 2, characterized in that, The inner diameters of the two flow splitting outlet ends are different. The flow splitting outlet end with a larger inner diameter is communicated with the inlet of the liquid cooling region with a larger heat exchange area, and the flow splitting outlet end with a smaller inner diameter is communicated with the inlet of the liquid cooling region with a smaller heat exchange area.

4. The liquid cooling plate with coolant flow distribution according to claim 2 or 3, characterized in that The two flow splitting outlet ends are respectively communicated with the inlets of the two liquid cooling regions through flow splitting connecting pipes.

5. The liquid cooling plate with coolant flow distribution according to claim 2, characterized in that The two flow collecting inlet ends are respectively communicated with the outlets of the two liquid cooling regions through flow collecting connecting pipes.

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