Efficient temperature-equalizing and flow-equalizing double-layer liquid cooling plate

Abstract

The utility model belongs to the technical field of liquid cooling plates, and particularly relates to a high-efficiency temperature-equalizing flow-equalizing double-layer liquid cooling plate, which comprises an upper-layer cold plate and a lower-layer cold plate, and an upper substrate is welded at the top of the upper-layer cold plate. By arranging the fins, cooling liquid is shunted through the fins, temperature and flow equalization is facilitated, the cooling effect on the battery module is improved, the cooling process can be accelerated by staggered turbulent flow of the cooling liquid through the fins, and low-temperature cooling liquid flows in from a liquid inlet, is uniformly shunted to four runners of the upper-layer cold plate and flows from the front end of the module to the tail end of the module in a staggered manner; the cooling liquid continuously absorbs heat generated by the battery cells on the top surface of the upper substrate, the temperature of the cooling liquid gradually rises, changes from low temperature to medium-high temperature, converges at the tail end, flows to the cavity of the lower runner in a reversing manner, then flows back and converges to the liquid outlet to flow out and circulate, and in the process, the medium-high temperature cooling liquid is always isolated at the lower layer, so that the temperature difference between the battery cells is obviously reduced.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling plate technology, and in particular to a high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate. Background Technology

[0002] Battery modules generate heat during operation, especially under high power output or frequent charge / discharge conditions, where the temperature rises significantly. To ensure battery safety and performance, liquid cooling systems are typically used for heat dissipation. Liquid cooling systems usually lower the battery module temperature through liquid cooling plates; that is, coolant flows within channels to carry away the heat generated by the battery module, thus maintaining the battery within a safe and stable operating temperature range.

[0003] In practical use, the flow channels of existing liquid cooling plates are usually arranged in an "arch" shape. This means that after the coolant enters the flow channel from the inlet, it flows unidirectionally along the channel and carries away heat. As the coolant flows, the water temperature gradually increases. When the coolant reaches the end of the flow channel, the temperature is already high, which can easily lead to a large temperature difference between the front and rear of the battery module. This results in a significant temperature difference and uneven cooling effect in different parts of the battery module, thus accelerating cell aging, affecting battery charging and discharging efficiency, and impacting cell lifespan. Utility Model Content

[0004] Based on the existing technical problem that the large temperature difference between the front and back of the coolant after liquid cooling in liquid cooling plates can easily affect the battery module, this utility model proposes a high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate.

[0005] This utility model proposes a high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate, comprising an upper cooling plate and a lower cooling plate. An upper substrate is welded to the top of the upper cooling plate, a flow channel plate is welded between the upper cooling plate and the lower cooling plate, and a lower substrate is welded to the bottom of the lower cooling plate.

[0006] Preferably, an inlet and an outlet are respectively provided on one side of the upper substrate, and an inlet collection cavity and a through hole are respectively provided on the same side as the inlet of the upper cold plate, and the inlet collection cavity is connected to the inlet.

[0007] The above technical solution allows for the introduction of low-temperature coolant into the inlet manifold of the upper cold plate via the inlet port, facilitating the introduction of low-temperature coolant.

[0008] Preferably, the upper substrate and the upper cold plate together form an integral structure with a pre-reserved upper flow channel cavity.

[0009] The above technical solution utilizes the upper flow channel cavity to circulate low-temperature coolant, which facilitates the cooling of the battery module by the low-temperature coolant, and the overall structure has high strength.

[0010] Preferably, a flow-through hole is provided on the side of the flow channel plate opposite to the liquid inlet, and a downstream flow channel cavity is reserved inside the integral formed by the lower substrate and the lower cold plate.

[0011] Through the above technical solution, after the low-temperature coolant cools down the battery module, it turns into a medium-high temperature coolant, and the medium-high temperature coolant is transported from the upstream flow channel cavity to the downstream flow channel cavity through the flow-through hole.

[0012] Preferably, an outlet manifold cavity is provided on the side of the upper cold plate same as the liquid inlet, and fins are provided in both the upstream flow channel cavity and the downstream flow channel cavity.

[0013] Through the above technical solution, the low-temperature coolant is transported from the upstream flow channel cavity to the flow-through hole and turns into a medium-high temperature coolant, and then is transported from the downstream flow channel cavity to the outlet manifold cavity for reflux. The outlet manifold cavity collects the medium-high temperature coolant in one place, facilitating the outflow of the medium-high temperature coolant. The fins adopt the classic wide flow channel fin structure of Yixineng, which can shunt the low-temperature coolant, facilitate uniform temperature and uniform flow, and has high overall structural strength.

[0014] Preferably, a mating outlet is provided on the side of the flow channel plate same as the liquid inlet, the outlet manifold cavity is communicated with the mating outlet, and the mating outlet is communicated with the liquid outlet through a through hole.

[0015] Through the above technical solution, the medium-high temperature coolant is transported to the liquid outlet through the through hole by using the mating outlet, facilitating the discharge and recovery of the medium-high temperature coolant from the liquid outlet.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. By providing fins, the fins shunt the coolant, facilitating uniform temperature and uniform flow, improving the cooling effect on the battery module. The coolant turbulently flows through the fins in a staggered manner, which can accelerate the cooling process and reduce the temperature difference between the front and rear of the battery module.

[0018] 2. By providing the upper cold plate and the lower cold plate, the coolant in the double-layer cold plate as a whole flows in a "C" shape. The low-temperature coolant flows in from the liquid inlet, is evenly shunted into the four flow channels of the upper cold plate, and respectively flows through the front end of the module to the rear end in a staggered manner. During this process, the coolant continuously absorbs and takes away the heat generated by the battery cells on the top surface of the upper substrate. The temperature of the coolant gradually increases, changing from low temperature to medium-high temperature, and converges and changes direction at the rear end and flows into the downstream flow channel cavity, then refluxes, converges and flows out of the liquid outlet for circulation. During this process, the medium-high temperature coolant is always separated in the lower layer, avoiding direct contact with the module surface and causing high temperature of local battery cells, thereby ensuring the relative uniformity of the temperature of each module's battery cells, that is, significantly reducing the temperature difference between the battery cells. Description of the Drawings

[0019] Figure 1 This is a schematic diagram of the structure of a high-efficiency temperature and flow uniform double-layer liquid cooling plate proposed in this utility model;

[0020] Figure 2 This invention proposes a high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate. Figure 1 Enlarged view of the structure at point A;

[0021] Figure 3 This is a schematic diagram of the flow channel plate structure of a high-efficiency uniform temperature and flow double-layer liquid cooling plate proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the coolant flow direction of a high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate proposed in this utility model.

[0023] Figure 5 This is a comparison diagram of a high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate proposed in this utility model.

[0024] In the diagram: 1. Upper cold plate; 2. Lower cold plate; 3. Upper substrate; 4. Lower substrate; 5. Liquid inlet; 6. Liquid outlet; 7. Inlet manifold; 8. Flow channel plate; 9. Fin; 10. Flow hole; 11. Outlet manifold; 12. Matching outlet. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-3 A high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate includes an upper cooling plate 1 and a lower cooling plate 2. An upper substrate 3 is welded to the top of the upper cooling plate 1, a flow channel plate 8 is welded between the upper cooling plate 1 and the lower cooling plate 2, and a lower substrate 4 is welded to the bottom of the lower cooling plate 2.

[0027] To enable the liquid cooling assembly to operate, the upper substrate 3 has an inlet 5 and an outlet 6 on one side. The upper cold plate 1, on the same side as the inlet 5, has an inlet manifold 7 with a through-hole. The inlet manifold 7 communicates with the inlet 5, allowing low-temperature coolant to flow into the inlet manifold 7 of the upper cold plate 1. The upper substrate 3 and the upper cold plate 1 together form an internal upper flow channel cavity for the flow of low-temperature coolant, facilitating cooling of the battery module. The flow channel plate 8 has a flow hole 10 on the side opposite to the inlet 5. The lower substrate 4 and the lower cold plate 2 together form a internal lower flow channel cavity. After cooling the battery module, the low-temperature coolant transforms into a medium-high temperature coolant, which is then transported from the upper flow channel cavity to the lower flow channel cavity via the flow hole 10. An outlet collecting cavity 11 is provided on the same side as the liquid inlet 5 on the upper cold plate 1. Fins 9 are provided in both the upper and lower flow channel cavities. Low-temperature coolant is transported from the upper flow channel cavity to the flow hole 10 and transformed into medium- and high-temperature coolant. It is then transported from the lower flow channel cavity to the outlet collecting cavity 11 for recirculation. The outlet collecting cavity 11 collects the medium- and high-temperature coolant in one place, facilitating its outflow. The fins 9 adopt the classic wide flow channel fin structure of Yixineng, which can divert the low-temperature coolant, facilitate uniform temperature and flow, and has high overall structural strength. A matching outlet 12 is provided on the same side as the liquid inlet 5 on the flow channel plate 8. The outlet collecting cavity 11 is connected to the matching outlet 12. The matching outlet 12 is connected to the liquid outlet 6 through a through hole. The matching outlet 12 is used to transport the medium- and high-temperature coolant through the through hole to the liquid outlet 6, facilitating the discharge and recovery of the medium- and high-temperature coolant from the liquid outlet 6.

[0028] By setting fins 9, the coolant is diverted, facilitating temperature and flow uniformity and improving the cooling effect on the battery module. The coolant flows in a straight line through the fins 9, accelerating the cooling process and reducing the temperature difference between the front and back of the battery module. With upper cold plate 1 and lower cold plate 2, the coolant within the double-layer cold plates flows in a "U" shape. Low-temperature coolant flows in from inlet 5 and is evenly distributed to the four channels of upper cold plate 1, flowing alternately from the front to the rear of the module. During this process, it continuously absorbs and carries away the heat generated by the cells on the top surface of the upper substrate 3, causing the coolant temperature to gradually increase from low to medium-high temperature. At the rear, the coolant converges and reverses direction, flowing into the lower channel cavity, then back and converges again to exit through outlet 6. Throughout this process, the medium-high temperature coolant is always isolated in the lower layer, preventing direct contact with the module surface and avoiding localized high cell temperatures. This ensures the relative uniformity of cell temperature across the modules, significantly reducing the temperature difference between cells. The coolant flow direction is as follows: Figure 5 As shown, compared with traditional liquid cooling plates, this liquid cooling plate can greatly reduce the temperature difference between the front and back of the battery, thereby extending the service life of the battery module.

[0029] Working principle:

[0030] The liquid is introduced from the inlet 5 and evenly distributed into the upper flow channel cavity through the inlet collection cavity 7 of the upper cold plate 1 to exchange heat with the battery module, which accelerates the cooling process and reduces the temperature difference between the front and back of the battery module. Then it flows to the lower flow channel cavity through the flow hole 10.

[0031] After flowing to the outlet manifold 11, the liquid is transported to the outlet manifold 11 for return and convergence through the outlet 12 and through hole, and finally discharged and recovered from the outlet 6, avoiding direct contact with the module surface and ensuring the relative uniformity of the temperature of each module cell.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency, temperature- and flow-equalizing double-layer liquid cooling plate, characterized in that: It includes an upper cold plate (1) and a lower cold plate (2). The top of the upper cold plate (1) is welded with an upper substrate (3). A flow channel plate (8) is welded between the upper cold plate (1) and the lower cold plate (2). The bottom of the lower cold plate (2) is welded with a lower substrate (4).

2. The high-efficient uniform-temperature and uniform-flow double-layer liquid cooling board according to claim 1, characterized in that: The upper substrate (3) is provided with an inlet (5) and an outlet (6) on one side. The upper cold plate (1) is provided with an inlet collection cavity (7) and a through hole on the same side as the inlet (5). The inlet collection cavity (7) is connected to the inlet (5).

3. The high-efficient uniform-temperature and uniform-flow double-layer liquid cooling board according to claim 2, characterized in that: The upper substrate (3) and the upper cold plate (1) together have an internal cavity reserved for the upper flow channel.

4. The high-efficient uniform-temperature and uniform-flow double-layer liquid cooling board according to claim 3, characterized in that: The flow channel plate (8) has a flow hole (10) on the side opposite to the liquid inlet (5), and the lower substrate (4) and the lower cold plate (2) form an integral structure with a reserved lower flow channel cavity inside.

5. The high-efficient uniform-temperature and uniform-flow double-layer liquid cooling board according to claim 4, characterized in that: The upper cold plate (1) is provided with an outlet collection cavity (11) on the same side as the liquid inlet (5), and fins (9) are provided in both the upper flow channel cavity and the lower flow channel cavity.

6. The high-efficient uniform-temperature and uniform-flow double-layer liquid cooling board according to claim 5, characterized in that: The flow channel plate (8) has a matching outlet (12) on the same side as the liquid inlet (5). The outlet collection cavity (11) is connected to the matching outlet (12), and the matching outlet (12) is connected to the liquid outlet (6) through a through hole.

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