Liquid cooling tray

Abstract

The liquid cooling tray comprises a bottom plate, and a plurality of battery module placement areas are formed on the top surface of the bottom plate; a plurality of groups of runners are formed in positions, corresponding to the battery module placement areas, in the bottom plate; a flow guide structure used for guiding cooling liquid to flow into or flow out of the flow channel is further arranged at one end, in the length direction, of the top face of the bottom plate. A plurality of liquid inlet holes and a plurality of liquid outlet holes matched with the flow channels are formed in the positions, corresponding to the flow guide structures, of the bottom plate; by arranging a plurality of groups of flow channels and flow guide structures and forming a plurality of liquid inlet holes and a plurality of liquid outlet holes matched with the flow channels at corresponding positions of the flow guide structures, cooling liquid uniformly enters the flow channels through the plurality of liquid inlet holes when entering the flow channels through the flow guide structures, so that the temperatures of the cooling liquid at all positions of the bottom plate are similar or even the same; and therefore, the cooling efficiency of each part is similar or even the same, the temperature of the battery module in the corresponding area of each runner is relatively balanced, and the service life of the battery module is ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage devices, and in particular to a liquid cooling tray. Background Art

[0002] As energy issues receive more and more attention, new energy vehicles have gained more and more favor among people. Therefore, there are continuous technological breakthroughs in the field of power batteries. People have higher and higher requirements on the energy density and assembly efficiency of battery boxes. It is a general trend to reduce the weight and cost of battery boxes.

[0003] Chinese patent CN214754004U discloses an integrated liquid-cooled battery box tray, including a tray shell, one or more mounting positions are provided on the tray shell, the mounting positions are used to install battery modules, and a plurality of flow channels arranged along the length direction are provided inside the tray shell, the plurality of flow channels are arranged in parallel and spaced apart and are used as channels for transporting cooling medium, each of the flow channels has a cooling medium inlet and a cooling medium outlet; or the plurality of flow channels share one cooling medium inlet and one cooling medium outlet;

[0004] The above patent combines the box and the liquid cooling plate in the prior art into one part, which serves as both the installation box of the battery module and the cooling plate of the battery, thereby solving the defects of the existing battery box with numerous parts, low assembly efficiency and large sheet metal box volume. It has fewer parts, simplified structure, improved assembly efficiency, increased energy density and reduced costs.

[0005] However, the above patent still has the following defects:

[0006] In the above patent, the cooling areas of the flow channels are different and the flow direction is single. The different areas lead to different cooling efficiencies of the cooling medium, which in turn leads to uneven temperatures of the battery modules in different areas, affecting the life of the battery modules. A single flow direction will make the temperature between the cooling medium inlet and the cooling medium outlet higher, which will also lead to uneven temperatures of the battery modules in different areas, thus affecting the life of the battery modules. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the present disclosure aims to provide a liquid cooling tray to solve the problems of uneven temperature of battery modules in different areas and short life of battery modules in the prior art.

[0008] The liquid cooling tray disclosed in the present invention comprises a bottom plate,

[0009] The top surface of the bottom plate is formed with a plurality of battery module placement areas;

[0010] A plurality of flow channels are formed inside the bottom plate at locations corresponding to the battery module placement area;

[0011] A guide structure for guiding the coolant to flow into or out of the flow channel is also provided on the top surface of the bottom plate at one end in the length direction;

[0012] A plurality of liquid inlet holes and a plurality of liquid outlet holes matched with the flow channel are formed on the bottom plate at positions corresponding to the flow guide structure.

[0013] Preferably, each group of the flow channels includes eight channels of equal width, with the center line of the width direction of the flow channels as the boundary, the four channels on one side of the center line are all liquid inlet channels, connected to the liquid inlet hole, and the four channels on the other side of the center line are all liquid outlet channels, connected to the liquid outlet hole.

[0014] Preferably, the guide structure is connected to the bottom plate or is formed integrally with the bottom plate, and the guide structure comprises a liquid inlet, a liquid inlet channel, a liquid outlet and a liquid outlet channel;

[0015] The plurality of liquid inlet holes are formed on the same straight line, the plurality of liquid outlet holes are formed on the same straight line, and the liquid inlet holes and the liquid outlet holes are staggered;

[0016] The liquid inlet channel includes a liquid inlet area and a diversion area, the liquid inlet area is connected to the liquid inlet port, the width of the liquid inlet area is greater than the width of the diversion area; the diversion area is connected to the liquid inlet hole;

[0017] The liquid outlet channel includes a liquid outlet area and a collecting area. The liquid outlet area is connected to the liquid outlet. The width of the liquid outlet area is greater than the width of the collecting area. The collecting area is connected to the liquid outlet hole.

[0018] Preferably, the liquid cooling tray further comprises a pipe joint, and the number of the pipe joints is two, one of the pipe joints is connected to the liquid inlet, and the other pipe joint is connected to the liquid outlet.

[0019] Preferably, the liquid inlet hole and the liquid outlet hole are both oblong through holes, the length of the liquid inlet hole is adapted to the sum of the widths of the four liquid inlet channels, and the length of the liquid outlet hole is adapted to the sum of the widths of the four liquid outlet channels.

[0020] Preferably, the liquid cooling tray further comprises a heat-insulating layer, and the heat-insulating layer is arranged on the bottom surface of the bottom plate and connected to the bottom plate.

[0021] Preferably, a plurality of support members are arranged on the top surface of the base plate along its length direction, and guardrails are arranged on the top surface of the base plate and on both sides in the length direction; the support members are adapted to the guardrails, and both ends of the support members in the length direction are connected to the guardrails.

[0022] Preferably, the distance h between two adjacent channel groups satisfies:

[0023] 10mm≤h≤20mm.

[0024] Preferably, protrusions are provided on the bottom surface of the bottom plate and on both sides in the length direction in a direction away from the bottom plate, and the length of the protrusions is adapted to the length of the bottom plate.

[0025] Preferably, the liquid cooling tray further comprises a plurality of reinforcing beams, which are parallel to each other and are arranged on the bottom surface of the bottom plate along the width direction of the bottom plate and connected to the bottom surface of the bottom plate.

[0026] The advantages of a liquid cooling tray disclosed in the present disclosure are:

[0027] By setting up multiple groups of flow channels and guide structures, and forming multiple liquid inlet holes and multiple liquid outlet holes that are compatible with the flow channels at the corresponding positions of the guide structures, when the coolant enters the flow channels through the guide structures, it enters each flow channel evenly through the multiple liquid inlet holes, so that the coolant temperature at various locations on the bottom plate is similar or even the same, thereby ensuring that the cooling efficiency at various locations is similar or even the same, ensuring that the temperature of the battery module in the corresponding area of ​​each flow channel is relatively balanced, and ensuring the life of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a liquid cooling tray according to the present disclosure;

[0029] Figure 2 yes Figure 1 A top view of

[0030] Figure 3 is a top view of the base plate;

[0031] Figure 4 4 is a top view of the flow guide tube.

[0032] Explanation of the accompanying drawings: 1-bottom plate, 11-battery module placement area, 12-flow channel, 13-liquid inlet hole, 14-liquid outlet hole, 2-flow guiding structure, 21-liquid inlet, 22-liquid outlet, 23-liquid inlet channel, 231-liquid inlet area, 232-diversion area, 24-liquid outlet channel, 241-liquid outlet area, 242-collecting area, 3-pipe joint, 4-support member, 5-protective enclosure. DETAILED DESCRIPTION

[0033] like Figure 1 and Figure 2 As shown, a liquid cooling tray disclosed in the present invention comprises a bottom plate 1,

[0034] The top surface of the bottom plate 1 is formed with a plurality of battery module placement areas 11;

[0035] A plurality of flow channels 12 are formed inside the bottom plate 1 at locations corresponding to the battery module placement area 11;

[0036] A guide structure 2 for guiding the coolant to flow into or out of the flow channel 12 is also provided on the top surface of the bottom plate 1 at one end in the length direction;

[0037] A plurality of liquid inlet holes 13 and a plurality of liquid outlet holes 14 adapted to the flow channel 12 are formed on the bottom plate at positions corresponding to the flow guide structure 2;

[0038] By setting a plurality of groups of flow channels 12 and guide structures 2, and forming a plurality of liquid inlet holes 13 and a plurality of liquid outlet holes 14 adapted to the flow channels 12 at the corresponding positions of the guide structures 2, when the coolant enters the flow channels 12 through the guide structures 2, the coolant enters each flow channel 12 evenly through the plurality of liquid inlet holes 13, so that the temperature of the coolant at various locations of the bottom plate is similar or even the same, thereby ensuring that the cooling efficiency at various locations is similar or even the same, ensuring that the temperature of the battery modules in the corresponding areas of each flow channel 12 is relatively balanced, and ensuring the life of the battery modules.

[0039] Further, such as Figure 3 As shown, each group of flow channels 12 includes eight channels of equal width, with the midline of the width direction of the flow channel 12 as the boundary, the four channels on one side of the midline are all liquid inlet channels, connected to the liquid inlet hole 13, and the four channels on the other side of the midline are all liquid outlet channels, connected to the liquid outlet hole 14;

[0040] That is, four channels are liquid inlet channels, four channels are liquid outlet channels, and the coolant passes through the liquid inlet hole 13; because the multiple channels in the flow channel 12 away from the end of the guide area 11 are interconnected, it is equivalent to each group of flow channels 12 forming a "U"-shaped channel. The coolant enters from the four liquid inlet channels, exchanges heat with the battery module, and is discharged from the four liquid outlet channels. When passing through the liquid outlet channels, it continues to exchange heat with the battery module, thereby ensuring the utilization rate and cooling effect of the coolant.

[0041] Furthermore, in order to facilitate the introduction and export of the coolant, the number of coolant inlet and outlet pipes can be reduced, such as Figure 4 As shown, the flow guiding structure 2 includes a liquid inlet 21, a liquid inlet channel 23, a liquid outlet 22 and a liquid outlet channel 24;

[0042] On the bottom plate 1, a plurality of liquid inlet holes 13 are formed on the same straight line, a plurality of liquid outlet holes 14 are formed on the same straight line, and the liquid inlet holes 13 and the liquid outlet holes 14 are staggered;

[0043] The liquid inlet channel 23 includes a liquid inlet area 231 and a diversion area 232. The liquid inlet area 231 is connected to the liquid inlet port 21. The width of the liquid inlet area 231 is greater than the width of the diversion area 232. The diversion area 232 is connected to the liquid inlet hole 13.

[0044] The liquid outlet channel 24 includes a liquid outlet area 241 and a current collecting area 242. The liquid outlet area 241 is connected to the liquid outlet 22. The width of the liquid outlet area 241 is greater than the width of the current collecting area 242. The current collecting area 242 is connected to the liquid outlet hole 14.

[0045] In order to ensure the sealing and avoid the seepage or leakage of the coolant, the guide structure 2 and the base plate 1 can be connected by welding, or the guide structure 2 and the base plate can be integrally formed. When welding is used for connection, a glue filling groove can be set between the liquid inlet channel 23 and the liquid outlet channel 24; structural glue is filled in the glue filling groove, and after the connection is completed, the structural glue is bonded to the base plate 1. Since the structural glue is characterized by high strength, anti-peeling and impact resistance, it can effectively avoid the coolant in the liquid inlet channel 23 and the liquid outlet channel 24 from penetrating and mixing with each other, thereby ensuring the temperature of the coolant entering the flow channel 12, and then ensuring the cooling efficiency of the coolant.

[0046] Furthermore, in order to allow the coolant to quickly enter the flow guiding structure 2 or quickly flow out of the flow guiding structure 2, a pipe joint 3 is added, such as Figure 1 As shown, there are two pipe joints 3, both of which are connected to the flow guiding structure 2, one of which is connected to the liquid inlet 21, and the other is connected to the liquid outlet 22;

[0047] The arrangement of the pipe joint 3 allows the coolant to quickly enter the flow guide structure 2 and then quickly enter the flow channel 12, and also quickly flow out of the flow guide structure 2, thereby ensuring the flow speed of the coolant and thus ensuring the cooling efficiency of the coolant.

[0048] Further, such as Figure 3 As shown, the liquid inlet hole 13 and the liquid outlet hole 14 are both oblong through holes, the length of the liquid inlet hole 13 is adapted to the sum of the widths of the four liquid inlet channels, and the length of the liquid outlet hole 14 is adapted to the sum of the widths of the four liquid outlet channels;

[0049] The liquid inlet hole 13 and the liquid outlet hole 14 are both designed to be oblong, which meets the connectivity between the liquid inlet hole 13 and multiple liquid inlet channels, and also meets the connectivity between the liquid outlet hole 14 and multiple liquid outlet channels. At the same time, the design of the oblong through hole is compatible with the diversion area 232 of the liquid inlet channel 23 and the collecting area 242 of the liquid outlet channel 24, which can appropriately improve the efficiency of liquid inlet and liquid outlet, thereby improving the cooling efficiency.

[0050] Furthermore, in order to improve the anti-condensation performance of the liquid cooling tray, an insulation layer is added, and the insulation layer is arranged on the bottom surface of the bottom plate 1 and connected to the bottom plate 1; the insulation layer can be bonded with conventional foaming materials, such as polystyrene board;

[0051] By setting up the insulation layer, the anti-condensation performance of the liquid cooling tray is ensured, and the improvement of the anti-condensation performance can also effectively improve the cooling efficiency of the liquid cooling tray.

[0052] Furthermore, in order to make the battery module more stable during installation and to separate the battery module placement area 11, a plurality of support members 4 are provided on the top surface of the bottom plate along its length direction, such as Figure 1 As shown, several support members 4 are arranged at intervals to separate the battery module placement area 11, so as to avoid that the spacing between adjacent battery modules is too small, electromagnetic interference is generated and the battery performance is affected, and on the side close to the guide structure 2, a part of the area is separated as a spacing area by the support member 4, and the guide structure 2 is separated from the battery module placement area 11 by a certain distance, so that when the guide structure 2 of the liquid cooling tray disclosed in the present invention leaks, the coolant will not immediately contact the battery module in the battery module placement area 11, thereby giving the staff a certain reaction time to take countermeasures, avoiding further aggravation of the leakage, improving safety performance, and ensuring the personal safety of the staff;

[0053] At the same time, in order to prevent the battery module from moving in the width direction when placed on the bottom plate, a guard 5 is provided on the top surface of the bottom plate and on both sides in the length direction, and both ends of the support member 4 in the length direction are connected to the guard 5, preferably by welding. The arrangement of the guard 5 and the cooperation between the support member 4 and the guard 5 limit the freedom of movement of the battery module placed on the battery module placement area 11, thereby preventing the battery module from leaving the battery module placement area 11;

[0054] Preferably, in order to make the liquid cooling tray disclosed in the present invention adapt to the battery cover during assembly, the thickness of the support member 4 is adapted to the thickness of the protective enclosure 5. Preferably, the thickness of the support member 4 is equal to the thickness of the protective enclosure 5, that is, the support member 4 and the protective enclosure 5 are of the same height.

[0055] Furthermore, the distance h between two adjacent flow channels 12 satisfies:

[0056] 10mm≤h≤20mm;

[0057] The two adjacent flow channels 12 do not interfere with each other, but in order to ensure the pressure bearing performance of the bottom plate 1, the distance between the two adjacent flow channels 12 should not be too close, and in order to ensure the cooling efficiency and save the consumption of the bottom plate 1 profile, the distance between the two adjacent flow channels 12 should not be too far. Under normal circumstances, the distance between the two adjacent flow channels 12 should meet the distance range as mentioned above, that is, between 10mm and 20mm. The specific distance can be specifically designed according to the number of channels in the flow channel 12 and the width of a single channel;

[0058] By setting the distance between two adjacent flow channels 12, the pressure bearing performance of the bottom plate 1 is guaranteed, while the cooling efficiency is guaranteed.

[0059] Furthermore, there are protrusions on the bottom surface of the bottom plate 1 and on both sides in the length direction in the direction away from the bottom plate 1, and the length of the protrusions is adapted to the length of the bottom plate 1;

[0060] Since a guardrail 5 is provided on the top surface of the bottom plate 1 and a protrusion is formed on the bottom surface of the bottom plate 1, the cross-section of the entire liquid cooling tray forms an "H"-shaped shape. Since an insulation layer is also provided on the bottom surface of the bottom plate 1, the protrusion design can prevent the insulation layer from directly rubbing against the bottom surface, reduce the wear of the insulation layer, and thus ensure the anti-condensation performance of the liquid cooling tray and the cooling efficiency.

[0061] Furthermore, in order to increase the pressure bearing performance of the liquid cooling tray, a plurality of reinforcing beams are added at the bottom of the bottom plate 1. The plurality of reinforcing beams are parallel to each other and are arranged on the bottom surface of the bottom plate 1 along the width direction of the bottom plate 1 and connected to the bottom surface of the bottom plate 1.

[0062] The connection method between the reinforcing beam and the bottom plate 1 is preferably welding, which ensures the stability of the connection between the bottom plate 1 and the reinforcing beam and the pressure-bearing performance of the liquid cooling tray.

[0063] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not 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 cannot be understood as limiting the scope of protection of the present disclosure.

[0064] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present disclosure.

Claims

1. A liquid cooling tray, characterized in that: comprising a bottom plate (1), A plurality of battery module placement areas (11) are formed on the top surface of the bottom plate (1); A plurality of flow channels (12) are formed inside the bottom plate (1) at locations corresponding to the battery module placement area (11); A flow guide structure (2) for guiding the coolant to flow into or out of the flow channel (12) is also provided on the top surface of the bottom plate (1) at one end in the length direction; A plurality of liquid inlet holes (13) and a plurality of liquid outlet holes (14) adapted to the flow channel (12) are formed on the bottom plate at locations corresponding to the flow guide structure (2).

2. The liquid cooling tray according to claim 1, characterized in that: Each group of the flow channels (12) comprises eight channels of equal width, with the center line of the width direction of the flow channel (12) as the boundary, the four channels on one side of the center line are all liquid inlet channels, connected to the liquid inlet hole (13), and the four channels on the other side of the center line are all liquid outlet channels, connected to the liquid outlet hole (14).

3. The liquid cooling tray according to claim 2, characterized in that: The flow guiding structure (2) is connected to the bottom plate or is formed integrally with the bottom plate, and the flow guiding structure (2) comprises a liquid inlet (21), a liquid outlet (22), a liquid inlet channel (23) and a liquid outlet channel (24); The plurality of liquid inlet holes (13) are formed on the same straight line, the plurality of liquid outlet holes (14) are formed on the same straight line, and the liquid inlet holes (13) and the liquid outlet holes (14) are staggered; The liquid inlet channel (23) comprises a liquid inlet area (231) and a diversion area (232); the liquid inlet area (231) is connected to the liquid inlet port (21); the width of the liquid inlet area (231) is greater than the width of the diversion area (232); the diversion area (232) is connected to the liquid inlet hole (13); The liquid outlet channel (24) comprises a liquid outlet area (241) and a collecting area (242); the liquid outlet area (241) is connected to the liquid outlet port (22); the width of the liquid outlet area (241) is greater than the width of the collecting area (242); and the collecting area (242) is connected to the liquid outlet hole (14).

4. The liquid cooling tray according to claim 3, characterized in that: It also comprises a pipe joint (3), wherein the number of the pipe joints (3) is two, one of the pipe joints (3) is connected to the liquid inlet (21), and the other of the pipe joints (3) is connected to the liquid outlet (22).

5. The liquid cooling tray according to claim 2, characterized in that: The liquid inlet hole (13) and the liquid outlet hole (14) are both oblong through holes; the length of the liquid inlet hole (13) matches the sum of the widths of the four liquid inlet channels; and the length of the liquid outlet hole (14) matches the sum of the widths of the four liquid outlet channels.

6. The liquid cooling tray according to claim 1, characterized in that: It also comprises a heat-insulating layer, which is arranged on the bottom surface of the bottom plate (1) and connected to the bottom plate (1).

7. The liquid cooling tray according to claim 1, characterized in that: A plurality of support members (4) are arranged on the top surface of the bottom plate along its length direction, and guardrails (5) are arranged on the top surface of the bottom plate on both sides in the length direction; the support members (4) are matched with the guardrails (5), and both ends of the support members (4) in the length direction are connected to the guardrails (5).

8. The liquid cooling tray according to claim 1, characterized in that: The distance h between two adjacent flow channels (12) satisfies: 10mm≤h≤20mm.

9. The liquid cooling tray according to claim 1, characterized in that: On the bottom surface of the bottom plate (1), protrusions are provided on both sides in the length direction in a direction away from the bottom plate (1), and the length of the protrusions is adapted to the length of the bottom plate (1).

10. The liquid cooling tray according to claim 9, characterized in that: It also comprises a plurality of reinforcing beams, which are parallel to each other and are arranged on the bottom surface of the bottom plate (1) along the width direction of the bottom plate (1) and are connected to the bottom surface of the bottom plate (1).

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