A battery heat dissipation system

Abstract

This utility model relates to the field of battery thermal management technology and discloses a battery heat dissipation system, including a first cooling cavity, a second cooling cavity, and multiple heat dissipation components. Both the first and second cooling cavities are located above a cell array, with the second cooling cavity positioned above the first cooling cavity. One end of each heat dissipation component is disposed in the gap between adjacent cylindrical cells, and the other end is located within the first and second cooling cavities. Both the first and second cooling cavities are used for circulating cooling medium, with the flow direction of the cooling medium in the first cooling cavity opposite to that in the second cooling cavity. This utility model achieves the following technical effects: through the cooperation of the heat dissipation components and the reverse-flowing cooling medium in the first and second cooling cavities, rapid heat dissipation of the battery is achieved, improving heat dissipation efficiency. Simultaneously, it also improves the temperature uniformity inside the battery. The battery heat dissipation system has a simple structure and low heat dissipation cost.

Description

Technical Field

[0001] This utility model belongs to the field of battery thermal management technology, and specifically relates to a battery heat dissipation system. Background Technology

[0002] The rapid development of the new energy industry has led to the widespread application of batteries as core energy storage components in electric vehicles and energy storage systems. In recent years, continuous innovation in battery technology has resulted in significant improvements in energy density and charge / discharge power. However, the increased heat generation from large-capacity, high-power batteries has presented serious challenges to battery thermal management. Excessively high battery temperatures not only accelerate battery aging but can also trigger thermal runaway, threatening system safety. Furthermore, uneven temperature distribution within the battery pack can lead to localized performance degradation, affecting overall lifespan and energy efficiency. Therefore, efficient and safe battery heat dissipation is crucial for ensuring battery performance, lifespan, and safety. Reducing the maximum battery temperature and improving internal temperature uniformity are particularly critical.

[0003] A battery typically contains an array of cells. Existing battery cooling systems usually place heat-conducting components in the gaps between adjacent cells, with the tips of these components extending above the cells. Heat is exchanged between the heat-conducting components and a unidirectionally flowing cooling medium, thus achieving heat dissipation. However, using a unidirectionally flowing cooling medium can easily lead to temperature differences in different areas inside the battery, compromising battery performance stability and resulting in low heat dissipation efficiency. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a battery heat dissipation system. The heat generated by the cylindrical battery cell is conducted to the first and second cooling chambers through a heat dissipation component. The heat on the heat dissipation component is carried away and dissipated to the outside by the cooling medium flowing in opposite directions in the first and second cooling chambers. This system enables rapid heat dissipation of the battery with high efficiency. At the same time, it also improves the temperature uniformity inside the battery. Furthermore, the system has a simple structure and low heat dissipation cost.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0006] This utility model provides a battery heat dissipation system. The battery includes a cell array formed by arranging multiple cylindrical cells. The battery heat dissipation system includes a first cooling cavity, a second cooling cavity, and multiple heat dissipation components.

[0007] The first cooling cavity and the second cooling cavity are both located above the cell array, and the second cooling cavity is located above the first cooling cavity. The plurality of heat dissipation components are arranged in the gaps between the plurality of cylindrical cells, and the heat dissipation components are located in the first cooling cavity and the second cooling cavity.

[0008] Both the first cooling cavity and the second cooling cavity are used for circulating cooling medium, and the flow direction of the cooling medium in the first cooling cavity is opposite to that in the second cooling cavity.

[0009] As a further description of the technical solution of this utility model, the first cooling cavity and the second cooling cavity are separated by a metal partition.

[0010] As a further description of the technical solution of this utility model, the first cooling cavity is provided with a first fluid inlet and a first fluid outlet on opposite sides, and the second cooling cavity is provided with a second fluid inlet and a second fluid outlet on opposite sides, with the second fluid outlet located above the first fluid inlet and the second fluid inlet located above the first fluid outlet.

[0011] As a further description of the technical solution of this utility model, the heat sink includes a first end and a second end connected to the first end. The first end is located in the gap between adjacent cylindrical cells, and the second end passes through the bottom wall of the first cooling cavity and the bottom wall of the second cooling cavity and is located in the first cooling cavity and the second cooling cavity.

[0012] As a further description of the technical solution of this utility model, the cylindrical cells are arranged alternately between each pair of adjacent rows, and the outer wall of each cylindrical cell is in contact with the first end of the six heat sinks.

[0013] As a further description of the technical solution of this utility model, the cross-section of the first end is triangular, the cross-section of the second end is circular, and the cross-sectional area of ​​the first end is smaller than the cross-sectional area of ​​the second end.

[0014] As a further description of the technical solution of this utility model, the second end is provided with a plurality of heat dissipation fins along the vertical direction.

[0015] As a further description of the technical solution of this utility model, the heat dissipation fins are circular in shape.

[0016] As a further description of the technical solution of this utility model, the portion of the second end located in the first cooling cavity and the portion of the second end located in the second cooling cavity are provided with the same number of heat dissipation fins.

[0017] As a further description of the technical solution of this utility model, the cooling medium is air or liquid.

[0018] In summary, this utility model has at least the following advantages:

[0019] The battery cooling system provided by this utility model arranges multiple heat dissipation components in the gaps between multiple cylindrical cells, and extends each heat dissipation component into the first cooling cavity and the second cooling cavity. This enables the heat generated by each cylindrical cell to be transferred to the first cooling cavity and the second cooling cavity in a timely manner. The cooling medium flowing in the opposite direction in the first cooling cavity and the second cooling cavity can quickly carry away the heat from the heat dissipation components and dissipate it to the outside, thereby reducing the internal temperature of the battery in a timely manner. At the same time, the reverse flow of the cooling medium can improve the temperature uniformity inside the battery, ensuring the normal and stable performance of the battery. Moreover, the battery cooling system has a simple structure and low cooling cost. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery heat dissipation system according to Embodiment 1 of this utility model;

[0021] Figure 2 This is a cross-sectional view of the battery heat dissipation system of Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first cooling cavity and the second cooling cavity in Embodiment 1 of this utility model;

[0023] Figure 4 This is a cross-sectional view of the battery heat dissipation system of Embodiment 2 of this utility model;

[0024] Figure 5 This is a bottom view of the battery heat dissipation system of Embodiment 2 of this utility model;

[0025] Figure 6 This is a bottom view of the heat sink component according to Embodiment 2 of this utility model;

[0026] Figure 7 This is a schematic diagram of the heat sink component in Embodiment 3 of this utility model.

[0027] Marked in the image:

[0028] 1. First cooling chamber; 11. First fluid inlet; 12. First fluid outlet;

[0029] 2. Second cooling chamber; 21. Second fluid inlet; 22. Second fluid outlet;

[0030] 3. Heat sink; 31. First end; 32. Second end; 33. Heat sink fins;

[0031] 4. Metal separator; 100. Cylindrical cell; 200. Cell array. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] refer to Figures 1 to 3 The battery cooling system provided in this embodiment includes a battery cell array 200 formed by arranging multiple cylindrical cells 100. The battery cooling system includes a first cooling cavity 1, a second cooling cavity 2, and multiple heat sinks 3. The heat sinks 3 have a rod-shaped structure and can be made of materials with high thermal conductivity, such as heat pipes.

[0036] The first cooling cavity 1 and the second cooling cavity 2 are both located above the cell array 200, with the second cooling cavity 2 located above the first cooling cavity 1. Multiple heat sinks 3 are arranged in the gaps between the multiple cylindrical cells 100, and the heat sinks 3 are located within the first cooling cavity 1 and the second cooling cavity 2. Specifically, the lower part of the heat sink 3 contacts the cylindrical cell 100, and the upper part of the heat sink 3 passes through the bottom wall of the first cooling cavity 1 and the bottom wall of the second cooling cavity 2, and is located within both the first cooling cavity 1 and the second cooling cavity 2. Both the first cooling cavity 1 and the second cooling cavity 2 are used for circulating cooling medium, and the flow direction of the cooling medium in the first cooling cavity 1 is opposite to the flow direction of the cooling medium in the second cooling cavity 2.

[0037] Understandably, the lower part of the heat sink 3 contacts the cylindrical cell 100, and the heat generated by the cylindrical cell 100 is conducted to the lower part of the heat sink 3. The heat from the lower part of the heat sink 3 is then further transferred to the upper part. Since the cooling medium flows in opposite directions within the first cooling chamber 1 and the second cooling chamber 2, it can exchange heat with the upper part of the heat sink 3, quickly carrying away the heat and dissipating it to the outside, thus achieving rapid cooling. Through the cooperation of the heat sink 3 and the reverse-flowing cooling medium within the first cooling chamber 1 and the second cooling chamber 2, rapid heat dissipation of the battery can be achieved, effectively improving heat dissipation efficiency. Simultaneously, the reverse-flowing cooling medium can improve the temperature uniformity inside the battery, ensuring normal and stable battery performance. Furthermore, the battery cooling system has a simple structure and low heat dissipation cost.

[0038] In some embodiments, the first cooling chamber 1 and the second cooling chamber 2 can be positioned below the cell array 200, thereby providing more ample space for components such as cell connection harnesses. Since the cooling medium does not directly contact the cylindrical cell 100, it can be air or a liquid. The air used can be room temperature air or cryogenic air, and the liquid used can be a room temperature liquid or a cryogenic liquid. In this embodiment, the cooling medium is air. During battery heat dissipation, the flow rate of the cooling medium can be controlled according to the actual internal temperature of the battery to adapt to different heat dissipation requirements and ensure efficient battery heat dissipation.

[0039] In some embodiments, the first cooling chamber 1 and the second cooling chamber 2 can be separated by a metal partition 4. Since the metal partition 4 has strong thermal conductivity, it can promote heat exchange between the first cooling chamber 1 and the second cooling chamber 2, further improving heat dissipation efficiency and the uniformity of the internal temperature of the battery.

[0040] In some embodiments, a first fluid inlet 11 and a first fluid outlet 12 are respectively provided on opposite sides of the first cooling chamber 1, and a second fluid inlet 21 and a second fluid outlet 22 are respectively provided on opposite sides of the second cooling chamber 2. The second fluid outlet 22 is located above the first fluid inlet 11, and the second fluid inlet 21 is located above the first fluid outlet 12.

[0041] When low-temperature air is used as the cooling medium, the first fluid inlet 11 and the second fluid inlet 21 can be connected to low-temperature air input pipes, which can be connected to the low-temperature air supply component. The first fluid outlet 12 and the second fluid outlet 22 can be connected to low-temperature air output pipes, which can be connected to the heat exchanger. The heat exchanger is connected to the low-temperature air supply component. This enables the recycling of low-temperature air, which helps to reduce heat dissipation costs and provides good heat dissipation effect.

[0042] When room temperature air is used as the cooling medium, the room temperature air can directly enter the first cooling chamber 1 and the second cooling chamber 2 from the outside through the first fluid inlet 11 and the second fluid inlet 21, and then be discharged to the outside through the first fluid outlet 12 and the second fluid outlet 22. There is no need to install a heat exchanger, the structure is simpler, and the heat dissipation cost is low.

[0043] The battery cooling system of this embodiment conducts the heat generated by the cylindrical battery cell to the first and second cooling chambers through a heat sink. The heat is then carried away and dissipated to the outside by a cooling medium flowing in opposite directions within the first and second cooling chambers. This achieves rapid heat dissipation of the battery with high efficiency, while also improving the temperature uniformity within the battery. Furthermore, the system is simple in structure and low in cost. By using a metal separator to separate the first and second cooling chambers, heat exchange between them is promoted, further improving heat dissipation efficiency and the uniformity of the battery's internal temperature.

[0044] Example 2

[0045] As a further optimization of Example 1, refer to Figures 4 to 6 The heat sink 3 includes a first end 31 and a second end 32 connected to the first end 31. The first end 31 is located in the gap between adjacent cylindrical cells 100. The second end 32 passes through the bottom wall of the first cooling cavity 1 and the metal partition 4 and is located in the first cooling cavity 1 and the second cooling cavity 2.

[0046] In one implementation, the cylindrical cells 100 are staggered between adjacent rows. The outer wall of each cylindrical cell 100 is in contact with the first end 31 of six heat sinks 3, and the first end 31 of the six heat sinks 3 are equally spaced around the outer periphery of the cylindrical cell 100. Correspondingly, each heat sink 3 is in contact with three cylindrical cells 100. By staggering the arrangement of adjacent rows of cylindrical cells 100, the overall structure of the battery is more compact, which is more conducive to reducing the battery's volume and increasing its energy density. At the same time, the contact between the heat sinks 3 and the cylindrical cells 100 is also tighter, which is more conducive to heat conduction and thus improves heat dissipation efficiency.

[0047] In this embodiment, the cross-section of the first end 31 is approximately triangular, and the cross-section of the second end 32 is circular, with the cross-sectional area of ​​the first end 31 being smaller than that of the second end 32. It is understood that the first end 31 has three arc-shaped sidewalls, which respectively contact the outer walls of three adjacent cylindrical cells 100. The second end 32 is cylindrical, and since its cross-sectional area is larger than that of the first end 31, its lower surface will contact the top of the cylindrical cell 100. Setting the cross-sectional area of ​​the first end 31 to be smaller than that of the second end 32 serves two purposes: firstly, it reduces the volume occupied by the first end 31, avoiding an increase in the gap distance between the cylindrical cells 100 and ensuring a minimized overall battery volume; secondly, it increases the surface area of ​​the second end 32, thereby increasing the contact area between the second end 32 and the cooling medium, effectively improving the heat dissipation efficiency of the second end 32.

[0048] Example 3

[0049] As a further optimization of Example 2, refer to Figure 7 The second end 32 is provided with multiple heat dissipation fins 33 arranged vertically, and each heat dissipation fin 33 is horizontally arranged on the second end 32. The heat dissipation fins 33 are circular in shape, and the shape of the heat dissipation fins 33 is the same as that of the second end 32. Moreover, the area of ​​the heat dissipation fins 33 is larger than the cross-sectional area of ​​the second end 32, that is, the edge of the heat dissipation fins 33 extends out of the second end 32. This can further increase the contact area between the heat dissipation component 3 and the cooling medium, promote the transfer and dissipation of heat, and improve the heat dissipation efficiency of the battery cooling system.

[0050] In this embodiment, the portion of the second end 32 located in the first cooling cavity 1 and the portion of the second end 32 located in the second cooling cavity 2 are provided with the same number of heat dissipation fins 33. Specifically, the portion of the second end 32 located in the first cooling cavity 1 and the portion of the second end 32 located in the second cooling cavity 2 are provided with two heat dissipation fins 33 at equal intervals, which can improve the heat dissipation uniformity and help to further improve the temperature uniformity inside the battery.

[0051] In practical applications, the number of heat dissipation fins 33 can be appropriately increased or decreased according to actual heat dissipation requirements to achieve the best heat dissipation effect. For example, during battery use, since the temperature in the central area of ​​the cell array 200 is usually high, the number of heat dissipation fins 33 on the heat dissipation component 3 in the central area of ​​the cell array 200 can be appropriately increased to increase the heat dissipation area of ​​the second end 32 and further improve the temperature uniformity inside the battery.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A battery heat dissipation system, the battery comprising a cell array (200) formed by arranging a plurality of cylindrical cells (100), characterized in that, It includes a first cooling chamber (1), a second cooling chamber (2), and multiple heat dissipation components (3); The first cooling cavity (1) and the second cooling cavity (2) are both located above the cell array (200), and the second cooling cavity (2) is located above the first cooling cavity (1). A plurality of heat dissipation components (3) are arranged in the gaps between the plurality of cylindrical cells (100), and the heat dissipation components (3) are located inside the first cooling cavity (1) and the second cooling cavity (2). Both the first cooling chamber (1) and the second cooling chamber (2) are used for circulating cooling medium, and the flow direction of the cooling medium in the first cooling chamber (1) is opposite to the flow direction of the cooling medium in the second cooling chamber (2).

2. The battery heat dissipation system according to claim 1, characterized in that, The first cooling chamber (1) and the second cooling chamber (2) are separated by a metal partition (4).

3. The battery heat dissipation system according to claim 1, characterized in that, The first cooling chamber (1) is provided with a first fluid inlet (11) and a first fluid outlet (12) on opposite sides, and the second cooling chamber (2) is provided with a second fluid inlet (21) and a second fluid outlet (22) on opposite sides. The second fluid outlet (22) is located above the first fluid inlet (11), and the second fluid inlet (21) is located above the first fluid outlet (12).

4. The battery heat dissipation system according to claim 2, characterized in that, The heat sink (3) includes a first end (31) and a second end (32) connected to the first end (31). The first end (31) is located in the gap between adjacent cylindrical cells (100). The second end (32) passes through the bottom wall of the first cooling cavity (1) and the bottom wall of the second cooling cavity (2) and is located in the first cooling cavity (1) and the second cooling cavity (2).

5. The battery heat dissipation system according to claim 4, characterized in that, The cylindrical cells (100) are arranged alternately between each pair of adjacent rows, and the outer wall of each cylindrical cell (100) is in contact with the first end (31) of each of the six heat sinks (3).

6. The battery heat dissipation system according to claim 5, characterized in that, The cross-section of the first end (31) is triangular, the cross-section of the second end (32) is circular, and the cross-sectional area of ​​the first end (31) is smaller than the cross-sectional area of ​​the second end (32).

7. The battery heat dissipation system according to claim 4, characterized in that, The second end (32) is provided with multiple heat dissipation fins (33) in the vertical direction.

8. The battery heat dissipation system according to claim 7, characterized in that, The heat dissipation fins (33) are circular in shape.

9. The battery heat dissipation system according to claim 7, characterized in that, The portion of the second end (32) located inside the first cooling cavity (1) and the portion of the second end (32) located inside the second cooling cavity (2) are provided with the same number of heat dissipation fins (33).

10. The battery heat dissipation system according to claim 1, characterized in that, The cooling medium is air or liquid.

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