Battery liquid cooling plate

Abstract

The utility model discloses a battery liquid cooling plate relates to battery cooling technical field, including liquid cooling plate, and the liquid cooling plate is equipped with the cold liquid cavity way, and the liquid cooling cavity way includes the first flow channel, the both sides of first flow channel are equipped with the multiple second flow channel of through, is equipped with the third flow channel of through on the liquid cooling plate of one side of first flow channel, is equipped with the fourth flow channel of through on the liquid cooling plate of the other side of first flow channel, one side of third flow channel is connected with the fifth flow channel of through, and the fourth flow channel of the side away from third flow channel is connected with the sixth flow channel of through, the utility model discloses the flow channel of linear type, is equipped with multiple water inlets and adjacent side and opposite water outlet, when the liquid flows in the flow channel, the flow rate is more uniform, and the flow channel of linear type has more gentle turning and longer flow path, reduces the turbulence and resistance in the flow process of fluid, thereby improves the cooling efficiency, and reduces the energy required for pumping.

Description

Technical Field

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

[0002] Electric vehicle batteries generate heat during charging and discharging and are highly sensitive to ambient temperature. When the battery temperature rises abnormally, it may cause internal short circuits and lead to safety accidents such as explosions. Liquid cooling plates are usually equipped in battery modules to exchange heat and ensure that the battery is always within the optimal operating temperature range, thereby ensuring battery performance and safety.

[0003] In the cooling system of a battery pack, heat exchange is achieved through the circulation of coolant inside the liquid cooling plate to cool the battery pack. Currently, most liquid cooling plates adopt a serpentine flow channel design, in which the coolant flows to complete the heat exchange process. However, the resistance of the coolant flowing in the serpentine tube is relatively large, and the temperature difference between the coolant inlet and outlet is also large, which leads to uneven temperature distribution inside the battery pack and problems such as shortened battery life.

[0004] Patent CN218472067U discloses a liquid cooling plate and a battery pack. The plate is located on one side of a first heat exchanger layer via a first flow channel layer. The first flow channel layer has at least two first flow paths, each with a first inlet and a first outlet. The first inlet and first outlet of each first flow path are located on the same side of the first flow channel layer. The second flow channel layer is located on one side of the first flow channel layer. The second flow channel layer has at least two second flow paths, each with a second inlet and a second outlet. The second flow paths on the second flow channel layer are symmetrically arranged with the first flow paths on the first flow channel layer.

[0005] However, the liquid cooling plate in this patent has the following drawbacks: the liquid cooling plate uses a serpentine flow channel, and the flow resistance is large when the coolant flows in the serpentine flow channel, which is not conducive to heat exchange of the battery module and will accelerate the damage to the battery. Utility Model Content

[0006] To address the problems in existing liquid cooling plates that employ serpentine flow channels, resulting in high flow resistance of the coolant and a large temperature difference between the coolant inlet and outlet, leading to uneven temperature distribution within the battery pack and consequently affecting battery performance and lifespan, this invention provides a battery liquid cooling plate.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A battery liquid cooling plate includes a liquid cooling plate, an upper plate mounted on the upper surface of the liquid cooling plate, and a lower plate mounted on the lower surface of the liquid cooling plate. The liquid cooling plate has a cold liquid cavity channel, which includes a first flow channel. Multiple second flow channels are provided on both sides of the first flow channel. A third flow channel is provided on one side of the first flow channel, and a fourth flow channel is provided on the other side of the first flow channel. A fifth flow channel is connected to one side of the third flow channel, and a sixth flow channel is connected to the fourth flow channel on the side away from the third flow channel. The third and fourth flow channels, the fifth and sixth flow channels, and the second flow channels on both sides of the first flow channel are all symmetrically arranged with the first flow channel as the symmetry point.

[0009] Furthermore, the first flow channel is located in the middle of the liquid cooling plate, with one end of the first flow channel penetrating the liquid cooling plate and connecting to the water inlet, and the other end of the first flow channel penetrating the liquid cooling plate and connecting to the water outlet.

[0010] Furthermore, the liquid cooling plate has multiple through-holes on one side and multiple through-holes on the other three sides, with the coolant in the first, third, and fourth channels flowing out from the corresponding outlets.

[0011] Furthermore, the inclination angle between the first flow channel and the second flow channel is 45 degrees, the inclination angle between the fifth flow channel and the third flow channel is 45 degrees, the inclination angle between the sixth flow channel and the second flow channel is 45 degrees, and the second flow channels on the same side are all arranged in parallel.

[0012] Furthermore, the first flow channel is arranged in parallel with the third and fourth flow channels, the fifth flow channel is arranged in parallel with the second flow channel, and the sixth flow channel is arranged in parallel with the second flow channel.

[0013] Furthermore, a second support block is provided between the first flow channel and the second flow channel, as well as between the adjacent parallel third or fourth flow channel, and a first support block is provided between the third flow channel and the fifth flow channel, as well as between the horizontal flow channels.

[0014] Furthermore, the first support block is triangular in shape, the second support block is parallelogram in shape, and the area of ​​the second support block is twice that of the first support block.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model adopts a straight flow channel with multiple inlets, adjacent sides, and opposite outlets. When the liquid flows in the flow channel, the flow velocity is more uniform. The flow channel, through multiple branches, can evenly distribute the coolant to each area, ensuring that each heat-generating part can be fully cooled and avoiding local overheating. The straight flow channel has gentler bends and a longer flow path, reducing turbulence and resistance during the flow process, thereby improving cooling efficiency and reducing the energy required for pumping.

[0017] 2. This utility model achieves uniform heat exchange between the coolant plate and the multiple subdivided areas corresponding to each flow distribution area of ​​the battery module, thereby effectively improving the uniformity of the temperature distribution of the battery module. The coolant flow rate or velocity in the first flow channel is twice that at the inlet of the third and fourth flow channels, and the coolant flow rate or velocity at the inlet of the third flow channel is equal to that at the inlet of the fourth flow channel. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the liquid cooling plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the coolant path of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Upper plate; 101. Lower plate; 2. Liquid cooling plate; 3. Inlet; 4. Outlet; 5. Cooling liquid channel; 501. First flow channel; 502. Second flow channel; 503. Third flow channel; 504. Fourth flow channel; 505. Fifth flow channel; 506. Sixth flow channel; 6. First support block; 7. Second support block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 and Figure 2 As shown, a battery liquid cooling plate includes a liquid cooling plate 2, an upper plate 1 mounted on the upper surface of the liquid cooling plate 2, and a lower plate 101 mounted on the lower surface of the liquid cooling plate 2. Specifically, the upper plate 1, the liquid cooling plate 2, and the lower plate 101 are integrally formed, which improves the sealing performance of the coolant inside the liquid cooling plate 2. Both the upper plate 1 and the lower plate 101 are made of copper-aluminum composite material, which has the characteristics of high thermal conductivity and light weight, making it convenient to cool the battery module.

[0025] The liquid cooling plate 2 is provided with a cold liquid cavity 5, which includes a first flow channel 501. The first flow channel 501 is located in the middle of the liquid cooling plate 2. One end of the first flow channel 501 passes through the liquid cooling plate 2 and connects to the water inlet 3, and the other end of the first flow channel 501 passes through the liquid cooling plate 2 and connects to the water outlet 4.

[0026] The liquid cooling plate 2 has multiple through water inlets 3 on one side and multiple through water outlets 4 on the other three sides.

[0027] Please see Figure 2 and Figure 3 As shown, multiple second flow channels 502 are provided on both sides of the first flow channel 501. The inclination angle between the first flow channel 501 and the second flow channel 502 is 45 degrees. The 45-degree angle makes the coolant more smooth when turning, reduces flow resistance and energy loss, and improves the flow efficiency of the coolant. The second flow channels 502 on the same side are all arranged in parallel.

[0028] A third flow channel 503 is provided on one side of the liquid cooling plate 2 located in the first flow channel 501, and a fourth flow channel 504 is provided on the other side of the liquid cooling plate 2 located in the first flow channel 501. The first flow channel 501, the third flow channel 503, and the fourth flow channel 504 are arranged parallel to each other. One end of the third flow channel 503 and the fourth flow channel 504 passes through the inlet 3, and the other end of the third flow channel 503 and the fourth flow channel 504 passes through the outlet 4.

[0029] A through fifth flow channel 505 is connected to one side of the third flow channel 503. The fifth flow channel 505 is inclined at an angle of 45 degrees to the third flow channel 503. The fifth flow channel 505 in the middle is arranged to overlap with the second flow channel 502 and is arranged parallel to the second flow channel 502. The third flow channel 503 and the fifth flow channel 505 are the same inlet 3. The fifth flow channels 505 are all arranged in parallel.

[0030] The fourth flow channel 504, located away from the third flow channel 503, is connected to a through sixth flow channel 506. The sixth flow channel 506 is inclined at an angle of 45 degrees to the second flow channel 502. The sixth flow channel 506 in the middle is arranged to overlap with the second flow channel 502, and the sixth flow channel 506 is arranged parallel to the second flow channel 502. The fourth flow channel 504 and the sixth flow channel 506 are the same inlet 3. All the sixth flow channels 506 are arranged in parallel.

[0031] In this embodiment, a second support block 7 is provided between a first flow channel 501, a second flow channel 502, and two adjacent parallel third flow channels 503 or fourth flow channels 504. The second support block 7 is in the shape of a parallelogram. The support block is used to guide the flow of the cold liquid and to support the top wall of the cold liquid cavity 5, so that the cold liquid flows more smoothly.

[0032] A first support block 6 is provided between a third flow channel 503, a fifth flow channel 505, and a horizontal flow channel. The first support block 6 is triangular in shape. The area of ​​the second support block 7 is twice that of the first support block 6.

[0033] The third flow channel 503 and the fourth flow channel 504, the fifth flow channel 505 and the sixth flow channel 506, and the second flow channels 502 on both sides of the first flow channel 501 are all symmetrically arranged with the first flow channel 501 as the symmetrical point, which improves the temperature distribution uniformity of the battery module.

[0034] Specifically, a pressure valve is provided at the inlet 3 of the first flow channel 501, so that the flow rate or velocity of the coolant in the first flow channel 501 is twice that of the inlet 3 of the third flow channel 503 and the fourth flow channel 504, and the flow rate or velocity of the coolant at the inlet 3 of the third flow channel 503 is equal to that at the inlet 3 of the fourth flow channel 504; thus enabling the coolant plate to achieve uniform heat exchange with the multiple subdivided areas corresponding to each flow distribution area of ​​the battery module, thereby effectively improving the uniformity of the temperature distribution of the battery module.

[0035] This embodiment adopts a straight flow channel with multiple inlets 3 and adjacent sides and opposite outlets 4. When the liquid flows in the flow channel, the flow velocity is more uniform and it is less likely to have local uneven flow velocity or stagnation. The flow path of the straight channel is shorter, the flow channel resistance is small, and the pressure loss (pressure drop) of the liquid is lower.

[0036] Coolant circulation path:

[0037] First, the coolant simultaneously flows from inlet 3 into the first flow channel 501, the third flow channel 503, and the fourth flow channel 504. Then, the first flow channel 501 splits into the second flow channels 502 on both sides, while the third flow channel 503 splits into the fifth flow channel 505 on one side, and the fourth flow channel 504 splits into the sixth flow channel 506 on one side. Then, it flows out from the adjacent outlet 4. Part of the second flow channel 502 in the middle merges with the fifth flow channel 505 and the sixth flow channel 506, and another part merges with the third flow channel 503 and the fourth flow channel 504. Finally, the coolant in the first flow channel 501, the third flow channel 503, and the fourth flow channel 504 flows out from the opposite outlet 4, achieving the effect of rapid heat exchange.

[0038] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A battery liquid cooling plate, comprising a liquid cooling plate (2), an upper plate (1) mounted on the upper surface of the liquid cooling plate (2), and a lower plate (101) mounted on the lower surface of the liquid cooling plate (2); characterized in that, The liquid cooling plate (2) is provided with a cold liquid cavity (5), which includes a first flow channel (501); multiple second flow channels (502) are provided on both sides of the first flow channel (501); a third flow channel (503) is provided on one side of the liquid cooling plate (2) located on the first flow channel (501); a fourth flow channel (504) is provided on the other side of the liquid cooling plate (2); a fifth flow channel (505) is connected to one side of the third flow channel (503); a sixth flow channel (506) is connected to the fourth flow channel (504) on the side away from the third flow channel (503); the third flow channel (503) and the fourth flow channel (504), the fifth flow channel (505) and the sixth flow channel (506), and the second flow channels (502) on both sides of the first flow channel (501) are all symmetrically arranged with the first flow channel (501) as the symmetrical point.

2. The battery liquid cold plate of claim 1, wherein, The first flow channel (501) is located in the middle of the liquid cooling plate (2). One end of the first flow channel (501) passes through the liquid cooling plate (2) and connects to the water inlet (3). The other end of the first flow channel (501) passes through the liquid cooling plate (2) and connects to the water outlet (4).

3. The battery liquid cold plate of claim 2, wherein, The liquid cooling plate (2) has multiple through inlets (3) on one side and multiple through outlets (4) on the other three sides. The coolant in the first flow channel (501), the third flow channel (503) and the fourth flow channel (504) flows out from the corresponding outlets (4).

4. The battery liquid cold plate of claim 3, wherein, The first flow channel (501) and the second flow channel (502) are inclined at an angle of 45 degrees, the fifth flow channel (505) and the third flow channel (503) are inclined at an angle of 45 degrees, the sixth flow channel (506) and the second flow channel (502) are inclined at an angle of 45 degrees, and the second flow channels (502) on the same side are all arranged in parallel.

5. The battery liquid cold plate of claim 4, wherein, The first flow channel (501) is arranged in parallel with the third flow channel (503) and the fourth flow channel (504), the fifth flow channel (505) is arranged in parallel with the second flow channel (502), and the sixth flow channel (506) is arranged in parallel with the second flow channel (502).

6. The battery liquid cold plate of claim 5, wherein, A second support block (7) is provided between the first flow channel (501) and the second flow channel (502) and the adjacent parallel third flow channel (503) or fourth flow channel (504), and a first support block (6) is provided between the third flow channel (503) and the fifth flow channel (505) and the horizontal flow channel.

7. The battery liquid cold plate of claim 6, wherein, The first support block (6) is triangular in shape, and the second support block (7) is parallelogram in shape. The area of ​​the second support block (7) is twice that of the first support block (6).

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