Bidirectional flow channel double-side cooling energy storage battery module

Abstract

The utility model relates to the technical field of battery modules, and particularly discloses a bidirectional flow channel double-side cooling energy storage battery module which comprises a liquid cooling plate I and a liquid cooling plate II, a U-shaped flow channel; a water inlet pipe I and a water outlet pipe I; and a third water inlet pipe and a third water outlet pipe. According to the utility model, the cooling liquid with a low temperature enters the U-shaped flow channel through the water inlet pipe I on the liquid cooling plate I and is discharged from the water outlet pipe I, and the cooling liquid in the liquid cooling plate I flows in from a low position and flows out from a high position; the cooling liquid with the low temperature enters the U-shaped flow channel through a third water inlet pipe on the second liquid cooling plate and is discharged from a third water outlet pipe, and the cooling liquid in the second liquid cooling plate flows in from the high position and flows out from the low position; therefore, the heat exchange capacity of the first liquid cooling plate and the second liquid cooling plate is improved, the cooling and heat dissipation uniformity of the battery pack is improved, the temperature difference of the battery pack is reduced, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of battery module technology, and in particular relates to a bidirectional flow channel double-sided cooling energy storage battery module. Background Technology

[0002] A battery module is an integrated module composed of multiple battery cells, typically including battery cells, a battery management system (BMS), a casing, a heat dissipation system, and other components.

[0003] Currently, the heat dissipation system of battery modules generally adopts bottom cooling. Bottom cooling only contacts the bottom of the battery pack, resulting in a small heat dissipation area and range. Furthermore, due to the height of the battery pack, there is a large temperature difference between the top and bottom of the battery pack. This large temperature difference can easily lead to damage to the battery pack during use, which will not only affect the battery performance but also shorten the battery's lifespan. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a bidirectional flow channel double-sided cooling energy storage battery module. This solves the technical problem that existing battery packs use bottom cooling, resulting in a large temperature difference between the top and bottom of the battery pack. This large temperature difference can easily damage the battery pack during use, which not only affects battery performance but also shortens battery life.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A bidirectional flow channel, double-sided cooling energy storage battery module includes two side plates, a base plate, a battery pack placed on the base plate, two end caps, and an integrated motherboard. The module further includes:

[0007] Liquid cooling plate one and liquid cooling plate two are respectively located on both sides of the battery pack, and are located between the side guard plate and the battery pack;

[0008] U-shaped flow channels are provided on both the first liquid cooling plate and the second liquid cooling plate;

[0009] Water inlet pipe 1 and water outlet pipe 1, the lower half of the liquid cooling plate is connected to water inlet pipe 1, and the upper half of the liquid cooling plate is connected to water outlet pipe 1.

[0010] Water inlet pipe three and water outlet pipe three are provided. The upper half of the liquid cooling plate two is connected to water inlet pipe three, and the lower half of the liquid cooling plate two is connected to water outlet pipe three.

[0011] As a preferred embodiment of the above technical solution, the side of the liquid cooling plate one away from the inlet pipe one and the outlet pipe one is connected to the inlet pipe two, and the side of the liquid cooling plate one close to the inlet pipe one and the outlet pipe one is connected to the outlet pipe two. The outlet pipe two is T-shaped and is connected to the upper and lower ends of the liquid cooling plate one respectively. The side of the liquid cooling plate two away from the inlet pipe three and the outlet pipe three is connected to the inlet pipe four, and the side of the liquid cooling plate two close to the inlet pipe three and the outlet pipe three is connected to the outlet pipe four. The outlet pipe four is T-shaped and is connected to the upper and lower ends of the liquid cooling plate two respectively.

[0012] As a preferred embodiment of the above technical solution, both the liquid cooling plate one and the liquid cooling plate two are provided with thermally conductive gel on the side near the battery pack.

[0013] As a preferred embodiment of the above technical solution, the first liquid cooling plate, the second liquid cooling plate, and the two U-shaped flow channels are all made of aluminum alloy.

[0014] As a preferred embodiment of the above technical solution, the side guard plate is provided with several heat dissipation holes.

[0015] As a preferred embodiment of the above technical solution, the side guard plate is provided with a plurality of heat sinks, and the heat sinks and heat dissipation holes are distributed at intervals.

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

[0017] 1. In this invention, coolant at a lower temperature enters the U-shaped flow channel through the inlet pipe 1 on the first liquid cooling plate and exits through the outlet pipe 1, forming a flow pattern where the coolant in the first liquid cooling plate flows in from a lower position and out from a higher position; coolant at a lower temperature enters the U-shaped flow channel through the inlet pipe 3 on the second liquid cooling plate and exits through the outlet pipe 3, forming a flow pattern where the coolant in the second liquid cooling plate flows in from a higher position and out from a lower position. This increases the heat exchange capacity of the first and second liquid cooling plates, improves the uniformity of cooling and heat dissipation of the battery pack, reduces the temperature difference of the battery pack, and thus extends the service life of the battery pack.

[0018] 2. In this utility model, when the battery pack temperature is relatively high, inlet pipe 1, outlet pipe 1, inlet pipe 3, and outlet pipe 3 are closed, while inlet pipe 2, outlet pipe 2, inlet pipe 4, and outlet pipe 4 are opened. This makes the coolant flow path a direct current channel, improving the cooling and heat dissipation effect. Moreover, the coolant flow direction on liquid cooling plate 1 and liquid cooling plate 2 is opposite, which further improves the heat exchange capacity of liquid cooling plate 1 and liquid cooling plate 2, improves the uniformity of cooling and heat dissipation of the battery pack, reduces the temperature difference of the battery pack, and thus extends the service life of the battery pack. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 2This is a schematic diagram of the structure of liquid cooling plate one and liquid cooling plate two.

[0021] In the picture:

[0022] 1. Side guard plate; 2. Liquid cooling plate one; 21. Water inlet pipe one; 22. Water outlet pipe one; 23. Water inlet pipe two; 24. Water outlet pipe two; 3. Battery pack; 4. End cap; 5. Liquid cooling plate two; 51. Water inlet pipe three; 52. Water outlet pipe three; 53. Water inlet pipe four; 54. Water outlet pipe four; 6. Thermal conductive gel; 7. Integrated motherboard; 8. U-shaped flow channel. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-2 As shown, a bidirectional flow channel double-sided cooling energy storage battery module includes two side guard plates 1, a base plate, a battery pack 3 placed on the base plate, two end caps 4, and an integrated motherboard 7. The module also includes:

[0025] Liquid cooling plate 1 2 and liquid cooling plate 2 5 are located on both sides of battery pack 3, and are located between side guard plate 1 and battery pack 3.

[0026] The U-shaped flow channel 8 is provided on both the liquid cooling plate 2 and the liquid cooling plate 5;

[0027] Water inlet pipe 21 and water outlet pipe 22 are connected to the lower half of the liquid cooling plate 2 and the upper half of the liquid cooling plate 2.

[0028] Water inlet pipe 351 and water outlet pipe 352 are connected to the upper half of the liquid cooling plate 25 and the lower half of the liquid cooling plate 25.

[0029] In practical applications, the liquid cooling plate 2 and the liquid cooling plate 5 simultaneously cool and dissipate heat on the battery pack 3, improving the cooling effect on the battery pack 3, effectively avoiding large temperature differences on the battery pack 3, preventing damage to the battery pack 3 due to excessive temperature differences, and improving the service life of the battery pack 3.

[0030] Coolant at a lower temperature enters the U-shaped flow channel 8 through the inlet pipe 21 on liquid cooling plate 2 and exits through the outlet pipe 22, forming a flow pattern of coolant entering from a lower position and exiting from a higher position in liquid cooling plate 2. Similarly, coolant at a lower temperature enters the U-shaped flow channel 8 through the inlet pipe 51 on liquid cooling plate 2 and exits through the outlet pipe 52, forming a flow pattern of coolant entering from a higher position and exiting from a lower position in liquid cooling plate 2. Thus, when the coolant enters the U-shaped flow channel 8 on liquid cooling plate 2, its temperature gradually increases. The coolant temperature is relatively high in the upper part of the U-shaped flow channel 8, reducing its cooling effect on the battery pack 3. However, as the coolant enters the liquid cooling... The coolant in the U-shaped flow channel 8 on liquid cooling plate 2 (5) first flows in the upper half of the U-shaped flow channel 8, where the coolant temperature is relatively low, thus providing better cooling for the upper half of the battery pack 3. Conversely, the coolant temperature is relatively low in the lower half of the U-shaped flow channel 8 on liquid cooling plate 1 (2), providing better cooling for the lower half of the battery pack 3. The coolant temperature is relatively high in the lower half of the U-shaped flow channel 8 on liquid cooling plate 2 (5), reducing the cooling effect on the lower half of the battery pack 3. This increases the heat exchange capacity of liquid cooling plate 1 (2) and liquid cooling plate 2 (5), improves the uniformity of cooling and heat dissipation for the battery pack 3, reduces the temperature difference of the battery pack 3, and thus extends the service life of the battery pack 3.

[0031] Furthermore, the side of the liquid cooling plate 2 away from the inlet pipe 21 and the outlet pipe 22 is connected to the inlet pipe 23, and the side of the liquid cooling plate 2 close to the inlet pipe 21 and the outlet pipe 22 is connected to the outlet pipe 24. The outlet pipe 24 is T-shaped and is connected to the upper and lower ends of the liquid cooling plate 2. The side of the liquid cooling plate 25 away from the inlet pipe 351 and the outlet pipe 352 is connected to the inlet pipe 453, and the side of the liquid cooling plate 25 close to the inlet pipe 351 and the outlet pipe 352 is connected to the outlet pipe 454. The outlet pipe 454 is T-shaped and is connected to the upper and lower ends of the liquid cooling plate 25.

[0032] In one embodiment, the inlet pipe 21, outlet pipe 22, inlet pipe 23, outlet pipe 24, inlet pipe 3 51, outlet pipe 3 52, inlet pipe 4 53, and outlet pipe 4 54 can all be individually controlled to open and close, and are all connected to an external control unit.

[0033] In practical application, when the temperature of the battery pack 3 is relatively high, the inlet pipe 21, outlet pipe 22, inlet pipe 3 51, and outlet pipe 3 52 are closed, while the inlet pipe 23, outlet pipe 24, inlet pipe 4 53, and outlet pipe 4 54 are opened. The coolant at a lower temperature enters the U-shaped flow channel 8 on the liquid cooling plate 2 through inlet pipe 23. The coolant is divided into upper and lower sections by the U-shaped flow channel 8 to cool and dissipate heat from the battery pack 3, and finally exits from outlet pipe 24. The coolant at a lower temperature exits through inlet pipe 4 53. The coolant enters the U-shaped flow channel 8 on the liquid cooling plate 2 5, where it is divided into upper and lower sections to cool and dissipate heat from the battery pack 3. Finally, it is discharged from the outlet pipe 4 54. In this way, the flow path of the coolant is a direct current channel, which improves the cooling and heat dissipation effect. Moreover, the flow direction of the coolant on the liquid cooling plate 1 2 and the liquid cooling plate 2 5 is opposite, which further improves the heat exchange capacity of the liquid cooling plate 1 2 and the liquid cooling plate 2 5, improves the uniformity of cooling and heat dissipation of the battery pack 3, reduces the temperature difference of the battery pack 3, and thus extends the service life of the battery pack 3.

[0034] like Figure 1 As shown, both liquid cooling plate 1 2 and liquid cooling plate 2 5 are provided with thermally conductive gel 6 on the side near the battery pack 3.

[0035] In practical applications, the thermally conductive gel 6 exhibits excellent thermal conductivity, filling the tiny gaps between the battery pack 3 and the liquid cooling plates 2 and 5. This ensures that heat can be transferred more effectively from the battery pack 3 to the liquid cooling plates 2 and 5. This efficient thermal conduction helps reduce the battery's operating temperature, thereby improving battery performance and lifespan. Furthermore, when the battery pack 3 overheats, it may trigger thermal runaway, leading to damage or even safety incidents. By using the thermally conductive gel 6, the heat generated by the battery pack 3 can be dissipated promptly, preventing heat accumulation and effectively reducing the risk of thermal runaway. Additionally, the use of the thermally conductive gel 6 improves the overall heat dissipation performance of the battery pack 3, enabling it to maintain a stable operating state under various conditions, which helps enhance the reliability and stability of the battery pack 3.

[0036] like Figures 1-2 As shown, the liquid cooling plate 1 (2), the liquid cooling plate 2 (5), and the two U-shaped flow channels 8 are all made of aluminum alloy.

[0037] In this embodiment, aluminum alloy is used in practical applications because it has excellent thermal conductivity, enabling it to quickly transfer the heat generated by the battery pack 3 to the coolant. This efficient thermal conductivity helps maintain the stable operating temperature of the battery pack 3, avoiding performance degradation or safety hazards caused by overheating. Simultaneously, as a lightweight material, aluminum alloy has a density far lower than other metals such as copper. Using aluminum alloy to manufacture the liquid cooling plate 2, liquid cooling plate 5, and two U-shaped flow channels 8 can significantly reduce the weight of the entire system, thereby improving the portability and endurance of the equipment. Furthermore, aluminum alloy possesses high strength and good corrosion resistance. These characteristics allow the liquid cooling plate 2, liquid cooling plate 5, and two U-shaped flow channels 8 to maintain stable performance in various harsh environments, extending the service life of the equipment. Finally, aluminum alloy has good chemical compatibility with most coolants, meaning that it will not cause adverse reactions or corrosion problems when used in a liquid cooling system, ensuring the reliability and safety of the system.

[0038] like Figure 1 As shown, several heat dissipation holes are provided on the side guard plate 1.

[0039] Furthermore, the side guard plate 1 is provided with several heat sinks, and the heat sinks and heat dissipation holes are distributed at intervals.

[0040] In practical applications, opening heat dissipation holes can increase the contact area between the side guard plate 1 and the outside air, promote air circulation, and thus accelerate heat dissipation. This method helps to reduce the overall temperature of the battery pack 3 and improve heat dissipation efficiency. At the same time, opening heat dissipation holes can reduce the contact area between the side guard plate 1 and the liquid cooling plate 2 and the liquid cooling plate 5, reduce the heat transfer path, and alleviate the heat accumulation phenomenon.

[0041] The addition of heat sinks increases the contact area between the side guard plate 1 and the liquid cooling plate 2 and 5, promoting uniform heat distribution and preventing local overheating. At the same time, the heat sinks can quickly conduct heat from the liquid cooling plate 2 and 5 to the side guard plate 1 and dissipate it through the side guard plate 1, thereby enhancing the cooling capacity of the entire battery pack 3.

[0042] Working principle: During use, the coolant at a lower temperature enters the U-shaped flow channel 8 through the inlet pipe 21 on the liquid cooling plate 2 and exits through the outlet pipe 22. The coolant in the liquid cooling plate 2 flows in from a lower position and out from a higher position. Similarly, the coolant at a lower temperature enters the U-shaped flow channel 8 through the inlet pipe 51 on the liquid cooling plate 5 and exits through the outlet pipe 52. The coolant in the liquid cooling plate 5 also flows in from a higher position and out from a lower position. This increases the heat exchange capacity of the liquid cooling plates 2 and 5, improves the uniformity of cooling the battery pack 3, reduces the temperature difference of the battery pack 3, and thus extends the service life of the battery pack 3.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A bidirectional flow channel double-sided cooling energy storage battery module, comprising two side guard plates (1), a base plate, a battery pack (3) placed on the base plate, two end caps (4), and an integrated motherboard (7), characterized in that, The module also includes: Liquid cooling plate one (2) and liquid cooling plate two (5), the liquid cooling plate one (2) and liquid cooling plate two (5) are located on both sides of the battery pack (3), and the liquid cooling plate one (2) and liquid cooling plate two (5) are located between the side guard plate (1) and the battery pack (3); U-shaped flow channel (8), both the liquid cooling plate one (2) and the liquid cooling plate two (5) are provided with U-shaped flow channels (8); Water inlet pipe 1 (21) and water outlet pipe 1 (22) are connected to the lower half of the liquid cooling plate 1 (2) and the upper half of the liquid cooling plate 1 (2). Water inlet pipe 3 (51) and water outlet pipe 3 (52) are connected to the upper half of the liquid cooling plate 2 (5) and the lower half of the liquid cooling plate 2 (5).

2. The bidirectional flow channel, double-sided cooling energy storage battery module according to claim 1, characterized in that, The side of the liquid cooling plate 1 (2) away from the water inlet pipe 1 (21) and the water outlet pipe 1 (22) is connected to the water inlet pipe 2 (23). The side of the liquid cooling plate 1 (2) close to the water inlet pipe 1 (21) and the water outlet pipe 1 (22) is connected to the water outlet pipe 2 (24). The water outlet pipe 2 (24) is T-shaped and is connected to the upper and lower ends of the liquid cooling plate 1 (2). The side of the liquid cooling plate 2 (5) away from the water inlet pipe 3 (51) and the water outlet pipe 3 (52) is connected to the water inlet pipe 4 (53). The side of the liquid cooling plate 2 (5) close to the water inlet pipe 3 (51) and the water outlet pipe 3 (52) is connected to the water outlet pipe 4 (54). The water outlet pipe 4 (54) is T-shaped and is connected to the upper and lower ends of the liquid cooling plate 2 (5).

3. The bidirectional flow channel, double-sided cooling energy storage battery module according to claim 2, characterized in that, Both the liquid cooling plate one (2) and the liquid cooling plate two (5) are provided with thermal conductive gel (6) on the side near the battery pack (3).

4. The bidirectional flow channel double-sided cooling energy storage battery module according to claim 1, characterized in that, The liquid cooling plate one (2), liquid cooling plate two (5) and the two U-shaped flow channels (8) are all made of aluminum alloy.

5. The bidirectional flow channel, double-sided cooling energy storage battery module according to claim 1, characterized in that, The side guard plate (1) has several heat dissipation holes.

6. The bidirectional flow channel, double-sided cooling energy storage battery module according to claim 5, characterized in that, The side guard plate (1) is provided with a number of heat sinks, and the heat sinks and heat dissipation holes are distributed at intervals.

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