Liquid cooling plate and battery

Abstract

The utility model provides a liquid cooling plate and a battery. The liquid cooling plate comprises a substrate, the substrate is provided with a liquid inlet, a liquid outlet, a liquid inlet flow channel, a liquid outlet flow channel and an overflowing flow channel used for communicating the liquid inlet flow channel and the liquid outlet flow channel, the liquid inlet flow channel is communicated with the liquid inlet, the liquid outlet flow channel is communicated with the liquid outlet, and the liquid inlet and the liquid outlet are adjacently arranged. According to the technical scheme, the problem that the temperature uniformity of the battery cells is poor due to heat dissipation of a liquid cooling plate in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery liquid cooling technology, specifically to a liquid cooling plate and a battery. Background Technology

[0002] In electrochemical energy storage systems, blade batteries are widely used due to their high energy density and excellent power performance. However, as battery capacity increases, the heat generated during charging and discharging also increases, leading to a rise in battery temperature. Uneven temperature distribution can affect battery performance and lifespan. In liquid cooling technology, cooling water absorbs the heat generated by the battery through a liquid cooling plate in close contact with the blade battery and carries it away through circulation, thereby maintaining the battery within its optimal operating temperature range.

[0003] In existing technologies, liquid cooling for electrochemical energy storage blade batteries typically employs either coiled liquid cooling plates or stamped liquid cooling plates. Coiled plates have a relatively small heat dissipation area, making it difficult to effectively and evenly remove heat from the blade battery. Stamped liquid cooling plates, on the other hand, have uneven heat dissipation surfaces, resulting in inconsistent heat exchange efficiency of the cooling water at different locations on the plate, thus affecting the battery's temperature uniformity. This leads to poor cell temperature uniformity. Utility Model Content

[0004] The main purpose of this invention is to provide a liquid cooling plate and a battery to solve the problem of poor temperature uniformity of the battery cell caused by the heat dissipation of the liquid cooling plate in the prior art.

[0005] To achieve the above objectives, the present invention provides a liquid cooling plate, including a substrate, on which are provided a liquid inlet, a liquid outlet, a liquid inlet channel, a liquid outlet channel, and a flow channel for connecting the liquid inlet channel and the liquid outlet channel. The liquid inlet channel is connected to the liquid inlet, and the liquid outlet channel is connected to the liquid outlet. The liquid inlet and the liquid outlet are arranged adjacent to each other.

[0006] Furthermore, the inlet channel and the outlet channel extend along the first direction, and the inlet channel and the outlet channel are arranged side by side and adjacent to each other in the second direction, wherein the first direction and the second direction are arranged at an angle.

[0007] Furthermore, the flow channel includes a first channel and a second channel. Along the second direction, the liquid outlet channel, the liquid inlet channel, the first channel, and the second channel are arranged in sequence. The liquid inlet channel is connected to the liquid outlet channel through the first channel and the second channel.

[0008] Furthermore, the flow channel also includes a third channel, which connects the outlet of the inlet channel and the inlet of the first channel.

[0009] Furthermore, the flow channel also includes a fourth channel, which connects the outlet of the second channel and the inlet of the liquid outlet channel. The fourth channel is located on the side of the third channel opposite to the liquid inlet channel.

[0010] Furthermore, the flow channel includes: a first branch channel connected to the outlet of the inlet channel, the first branch channel being located on the side of the inlet channel opposite to the outlet channel; a second branch channel connected to the inlet channel, the connection point of the second branch channel with the inlet channel being located between the inlet and outlet of the inlet channel, the second branch channel being located on the side of the inlet channel opposite to the outlet channel, the first branch channel and the second branch channel being arranged in parallel; and a confluence channel, the first branch channel and the second branch channel being both connected to the inlet of the confluence channel, the outlet of the confluence channel being connected to the inlet of the outlet channel.

[0011] Furthermore, the second branch channel includes a first channel segment and a second channel segment that are connected and arranged in parallel. Along the second direction, the second channel segment, the first channel segment, the inlet channel and the outlet channel are arranged in sequence. Along the first direction, the third channel and the first branch channel are arranged at intervals. The inlet channel, the first channel segment, the second channel segment and the confluence channel are connected in sequence.

[0012] Furthermore, along the thickness direction of the substrate, the substrate has a first heat exchange surface and a second heat exchange surface disposed opposite to each other, and the liquid inlet channel, the liquid outlet channel and the flow channel are located between the first heat exchange surface and the second heat exchange surface, and the area of ​​the first heat exchange surface is equal to the area of ​​the second heat exchange surface.

[0013] Furthermore, the first heat exchange surface and / or the second heat exchange surface are provided with a plurality of recesses at intervals.

[0014] According to another aspect of the present invention, the present invention provides a battery, comprising: a housing; the aforementioned liquid cooling plate located inside the housing; and a battery module located inside the housing, wherein the battery module is provided on at least one side of the liquid cooling plate along the thickness direction of the liquid cooling plate.

[0015] By applying the technical solution of this utility model, the cooling water first enters the inlet channel from the inlet, and then enters the outlet channel through the outlet channel, carrying away the heat of the battery cell. The temperature of the cooling water rises accordingly. The hot water outlet with the increased temperature is close to the cold water inlet that just entered. The hot and cold areas are close together, which reduces the temperature difference of the entire liquid cooling plate, thereby helping to reduce the temperature difference of the battery cell and thus improving the temperature uniformity of the battery cell. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1A schematic diagram of the structure of a first embodiment of the liquid cooling plate of this utility model is shown;

[0018] Figure 2 It shows Figure 1 A schematic diagram of the structure of the liquid cooling plate in Embodiment 1;

[0019] Figure 3 A schematic diagram of the structure of Embodiment 2 of the liquid cooling plate of this utility model is shown;

[0020] Figure 4 It shows Figure 3 A schematic diagram of the structure of the liquid cooling plate in Embodiment 2;

[0021] Figure 5 It shows Figure 4 A magnified view of a portion of the liquid cooling plate.

[0022] The above figures include the following reference numerals:

[0023] 1. Substrate; 10. Liquid inlet channel; 11. Liquid inlet; 20. Liquid outlet channel; 12. Liquid outlet; 30. Flow channel; 31. First channel; 32. Second channel; 33. Third channel; 34. Fourth channel; 41. First branch channel; 42. Second branch channel; 421. First channel segment; 422. Second channel segment; 43. Converging channel; 50. Recessed portion. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 4 As shown, an embodiment of this utility model provides a liquid cooling plate. The liquid cooling plate includes a substrate 1, on which are provided an inlet 11, an outlet 12, an inlet channel 10, an outlet channel 20, and a flow channel 30 for connecting the inlet channel 10 and the outlet channel 20. The inlet channel 10 is connected to the inlet 11, and the outlet channel 20 is connected to the outlet 12. The inlet 11 and the outlet 12 are arranged adjacent to each other.

[0026] In the above technical solution, the cooling water first enters the inlet channel 10 from the inlet 11, and then enters the outlet channel 20 through the outlet channel 30, carrying away the heat of the battery cell. The temperature of the cooling water rises accordingly. The hot water outlet 12, which has risen in temperature, is adjacent to the cold water inlet 11 that has just entered. The hot and cold areas are close together, which reduces the temperature difference of the entire liquid cooling plate, thereby helping to reduce the temperature difference of the battery cell and thus improving the temperature uniformity of the battery cell.

[0027] Specifically, in the embodiments of this utility model, cooling water enters the inlet channel 10, the outlet channel 20 and the flow channel 30 through the inlet 11 and flows out from the outlet 12.

[0028] It should be noted that in the embodiments of this utility model, the inlet 11 of the liquid inlet channel 10 is directly connected, and the outlet 20 is directly connected to the outlet 12.

[0029] like Figure 1 and Figure 3 As shown in the embodiment of this utility model, the inlet channel 10 and the outlet channel 20 extend along the first direction X, and are arranged side by side and adjacent to each other in the second direction Y, wherein the first direction X and the second direction Y are arranged at an angle. This increases the contact area between hot and cold regions, thereby improving the temperature uniformity of the battery cell.

[0030] like Figure 1 and Figure 3 As shown in the embodiment of this utility model, along the thickness direction Z of the substrate 1, the substrate 1 has a first heat exchange surface and a second heat exchange surface arranged opposite to each other. The liquid inlet channel 10, the liquid outlet channel 20 and the flow channel 30 are located between the first heat exchange surface and the second heat exchange surface. The area of ​​the first heat exchange surface is equal to the area of ​​the second heat exchange surface. The first direction X, the second direction Y and the thickness direction Z are arranged at an angle to each other.

[0031] In the above technical solution, the substrate 1 has a first heat exchange surface and a second heat exchange surface arranged opposite to each other, and the areas of the two heat exchange surfaces are equal, ensuring that the heat dissipation performance of the cooling water within the substrate is balanced. Regardless of which side of the substrate the battery cell is located on, the same heat dissipation effect can be obtained, reducing the temperature difference between battery cells and extending the overall lifespan of the battery.

[0032] Furthermore, the liquid cooling plate can dissipate heat for both battery modules simultaneously, and can ensure that the effective heat dissipation area on the upper and lower surfaces of the liquid cooling plate is consistent, which is conducive to giving full play to the heat dissipation advantage of the flat upper and lower surfaces of the blade cell.

[0033] like Figure 3 and Figure 5 As shown in the embodiments of this utility model, a plurality of recesses 50 are provided at intervals on the first heat exchange surface and / or the second heat exchange surface.

[0034] In the above technical solution, the design of the recessed part 50 increases the contact area between the heat exchange surface and the cooling water, providing more heat exchange interfaces, thereby improving the heat exchange efficiency and enabling the heat of the battery cell to be carried away by the cooling water more quickly and fully.

[0035] Specifically, recesses 50 are evenly provided on the first and second heat exchange surfaces. This ensures that the cooling water is distributed more evenly on the liquid cooling plate, avoids local overheating, and improves the overall heat dissipation performance of the battery and the temperature consistency between the cells.

[0036] In one embodiment, the inlet 11 and outlet 12 can be aluminum machined water taps, which are fixed to the substrate 1 by welding. The substrate 1 is formed by aluminum extrusion process, and the two ends are sealed by arc welding with rectangular plugs.

[0037] In one embodiment, substrate 1 may also be made using a finned brazing process.

[0038] Example 1

[0039] like Figure 2 As shown, in the first embodiment of this utility model, the flow channel 30 includes a first channel 31 and a second channel 32. Along the second direction Y, the liquid outlet channel 20, the liquid inlet channel 10, the first channel 31 and the second channel 32 are arranged in sequence. The liquid inlet channel 10 is connected to the liquid outlet channel 20 through the first channel 31 and the second channel 32.

[0040] In the above technical solution, the arrangement of the first channel 31 and the second channel 32 enables the cooling water to form a more complex and uniform flow path when flowing through the liquid cooling plate. This enhances the heat exchange efficiency between the cooling water and the battery cell, allowing the entire liquid cooling plate to more effectively absorb and evenly distribute the heat generated by the battery cell.

[0041] like Figure 2 As shown in Embodiment 1 of this utility model, the flow channel 30 further includes a third channel 33, which is used to connect the outlet of the liquid inlet channel 10 and the inlet of the first channel 31.

[0042] With the above configuration, since the third channel 33 is directly connected to the liquid inlet channel 10 and the first channel 31, the cooling water can quickly and evenly cover the first channel 31, which enhances the heat exchange efficiency between the cooling water and the battery cell, effectively controls the battery temperature, and avoids local overheating.

[0043] like Figure 2 As shown in the first embodiment of this utility model, the flow channel 30 further includes a fourth channel 34, which is used to connect the outlet of the second channel 32 and the inlet of the liquid outlet channel 20. The fourth channel 34 is located on the side of the third channel 33 away from the liquid inlet channel 10.

[0044] With the above configuration, the fourth channel 34 and the third channel 33 can be arranged side by side, allowing the cooling water entering the third channel 33 from the liquid inlet channel 10 to exchange heat with the cooling water discharged into the fourth channel 34 from the second channel 32. This can reduce the temperature difference of the entire liquid cooling plate, thereby helping to reduce the temperature difference of the battery cell and thus improving the temperature uniformity of the battery cell.

[0045] Specifically, in Embodiment 1 of this utility model, a water-blocking strip is provided between the fourth channel 34 and the third channel 33 to separate the fourth channel 34 and the third channel 33. The water-blocking strip is fixed to the substrate 1 by welding.

[0046] Example 2

[0047] like Figure 3 As shown, in Embodiment 2 of this utility model, the flow channel 30 includes: a first branch channel 41, which is connected to the outlet of the inlet channel 10, and the first branch channel 41 is located on the side of the inlet channel 10 away from the outlet channel 20; a second branch channel 42, which is connected to the inlet channel 10, and the connection position of the second branch channel 42 with the inlet channel 10 is located between the inlet and outlet of the inlet channel 10, and the second branch channel 42 is located on the side of the inlet channel 10 away from the outlet channel 20, and the first branch channel 41 and the second branch channel 42 are arranged in parallel; and a confluence channel 43, in which the first branch channel 41 and the second branch channel 42 are both connected to the inlet of the confluence channel 43, and the outlet of the confluence channel 43 is connected to the inlet of the outlet channel 20.

[0048] In the above technical solution, the first channel 41 and the second channel 42 are connected in parallel, so that after the cooling water enters the liquid cooling plate, it can dissipate heat through two independent channels at the same time. This greatly improves the heat dissipation efficiency and ensures that the heat exchange between the cooling water and the battery cell is more sufficient and faster.

[0049] Furthermore, both the first channel 41 and the second channel 42 are located on the side of the inlet channel 10 away from the outlet channel 20. This layout reduces the intersection between channels, making the overall structure of the liquid cooling plate more compact and the space utilization rate higher, which helps to optimize the internal layout of the battery pack.

[0050] like Figure 3 As shown in Embodiment 2 of this utility model, the second branch channel 42 includes a first channel segment 421 and a second channel segment 422 that are connected and arranged in parallel. Along the second direction Y, the second channel segment 422, the first channel segment 421, the inlet channel 10 and the outlet channel 20 are arranged in sequence. Along the first direction X, the first channel segment 421 and the first branch channel 41 are arranged at intervals. The inlet channel 10, the first channel segment 421, the second channel segment 422 and the confluence channel 43 are connected in sequence.

[0051] In the above technical solution, the second channel section 422, the first channel section 421, the liquid inlet channel 10 and the liquid outlet channel 20 are arranged in sequence, so that the cooling water can be more evenly distributed in the width direction (second direction Y) of the liquid cooling plate, covering a wider range of cell areas, improving the uniformity of heat dissipation and the consistency of cell temperature inside the battery pack.

[0052] An embodiment of this utility model provides a battery. The battery includes: a housing; the aforementioned liquid cooling plate located inside the housing; and a battery module located inside the housing, with the battery module disposed on at least one side of the liquid cooling plate along the thickness direction Z.

[0053] It should be noted that in the embodiments of this utility model, battery modules are provided on both sides of the liquid cooling plate. In this way, the liquid cooling plate can dissipate heat for both the upper and lower battery modules simultaneously, saving the number of liquid cooling plates and improving the volume utilization rate in the height direction.

[0054] Specifically, in the embodiments of this utility model, a thermally conductive structural adhesive is provided between the liquid cooling plate and the battery module, and the heat is ultimately carried away by the cooling water circulation.

[0055] It should be noted that in the embodiments of this utility model, the first direction X, the second direction Y and the thickness direction Z are arranged perpendicularly to each other. The first direction X can be the length direction of the liquid cooling plate, the second direction Y is the width direction of the liquid cooling plate, and the thickness direction Z is the thickness direction of the liquid cooling plate.

[0056] The battery described above has all the advantages of the liquid cooling plate, which will not be repeated here.

[0057] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: Cooling water first enters the inlet channel from the inlet, and then enters the outlet channel through the outlet channel, carrying away the heat of the battery cell. The temperature of the cooling water rises accordingly. The hot water outlet with the rising temperature is close to the cold water inlet that just entered. The hot and cold areas are close together, which reduces the temperature difference of the entire liquid cooling plate, thereby helping to reduce the temperature difference of the battery cell and thus improving the temperature uniformity of the battery cell.

[0058] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid-cooled plate, characterized in that, The application relates to a substrate (1) provided with a liquid inlet (11), a liquid outlet (12), a liquid inlet channel (10), a liquid outlet channel (20) and a flow channel (30) for connecting the liquid inlet channel (10) and the liquid outlet channel (20), the liquid inlet channel (10) being connected with the liquid inlet (11), the liquid outlet channel (20) being connected with the liquid outlet (12), and the liquid inlet (11) and the liquid outlet (12) being arranged adjacently.

2. The liquid cold plate of claim 1, wherein, The liquid inlet channel (10) and the liquid outlet channel (20) extend along a first direction (X) and are arranged adjacently along a second direction (Y), wherein the first direction (X) and the second direction (Y) are arranged at an angle.

3. The liquid cold plate of claim 2, wherein, The flow channel (30) comprises a first passage (31) and a second passage (32), and the liquid outlet channel (20), the liquid inlet channel (10), the first passage (31) and the second passage (32) are arranged in sequence along the second direction (Y), and the liquid inlet channel (10) is connected with the liquid outlet channel (20) through the first passage (31) and the second passage (32).

4. The liquid cold plate of claim 3, wherein, The flow channel (30) further comprises a third passage (33) for connecting an outlet of the liquid inlet channel (10) with an inlet of the first passage (31).

5. The liquid cold plate of claim 4, wherein, The flow channel (30) further comprises a fourth passage (34) for connecting an outlet of the second passage (32) with an inlet of the liquid outlet channel (20), and the fourth passage (34) is located on a side of the third passage (33) away from the liquid inlet channel (10).

6. The liquid cold plate of claim 2, wherein, The flow channel (30) comprises: a first branch passage (41) connected with an outlet of the liquid inlet channel (10), and the first branch passage (41) is located on a side of the liquid inlet channel (10) away from the liquid outlet channel (20); a second branch passage (42) connected with the liquid inlet channel (10), and the connection position of the second branch passage (42) with the liquid inlet channel (10) is located between an inlet and an outlet of the liquid inlet channel (10), and the second branch passage (42) is located on a side of the liquid inlet channel (10) away from the liquid outlet channel (20), and the first branch passage (41) and the second branch passage (42) are arranged in parallel; a converging passage (43), and the first branch passage (41) and the second branch passage (42) are both connected with an inlet of the converging passage (43), and an outlet of the converging passage (43) is connected with an inlet of the liquid outlet channel (20).

7. The liquid cold plate of claim 6, wherein, The second branch channel (42) comprises a first channel segment (421) and a second channel segment (422) arranged in communication and parallel, along the second direction (Y), the second channel segment (422), the first channel segment (421), the liquid inlet flow channel (10) and the liquid outlet flow channel (20) are arranged in sequence, along the first direction (X), the first channel segment (421) and the first branch channel (41) are arranged in interval, the liquid inlet flow channel (10), the first channel segment (421), the second channel segment (422) and the confluence channel (43) are communicated in sequence.

8. The liquid cold plate of any of claims 1-7, wherein, Along the thickness direction (Z) of the substrate (1), the substrate (1) has a first heat exchange surface and a second heat exchange surface arranged oppositely, the liquid inlet flow channel (10), the liquid outlet flow channel (20) and the overcurrent flow channel (30) are located between the first heat exchange surface and the second heat exchange surface, the area of the first heat exchange surface is equal to the area of the second heat exchange surface.

9. The liquid cold plate of claim 8, wherein, A plurality of recesses (50) are arranged in interval on the first heat exchange surface and / or the second heat exchange surface.

10. A battery, characterized by Comprise: A shell; The liquid cooling plate according to any one of claims 1 to 9, located in the shell; A battery module, located in the shell, at least one side of the liquid cooling plate is provided with the battery module along the thickness direction (Z) of the liquid cooling plate.

Images