Heat radiator for sodium ion battery module and sodium ion battery module

Abstract

The utility model discloses a radiator for a sodium ion battery module and the sodium ion battery module, and relates to the technical field of sodium ion battery packs, the radiator comprises a plate body, the plate body is arranged at one end of the battery module in the thickness direction, the plate body comprises a first substrate and a second substrate, the first substrate is in contact with the end face of the battery module in the thickness direction, and the second substrate is in contact with the end face of the battery module in the thickness direction. The first base parts extend in the length direction of the battery module, the at least two first base parts are distributed in the width direction of the battery module at intervals, the first base parts are connected with gravity assisted heat pipes so as to achieve heat exchange with the battery module, the second base parts are arranged between the two adjacent first base parts, and the second base parts are arranged between the two adjacent first base parts. And the at least two second substrates are distributed at intervals in the length direction of the battery module, and the second substrates can realize heat exchange with the external environment, so that the heat dissipation efficiency is good, and the use safety of the battery module is ensured.

Description

Technical Field

[0001] This utility model relates to the field of sodium-ion battery technology, and in particular to a heat sink for a sodium-ion battery module and a sodium-ion battery module. Background Technology

[0002] A battery module refers to a series or parallel connection of several individual battery cells to obtain a larger voltage or capacity, thereby meeting the needs of different occasions. Compared with individual battery cells, battery modules generate more heat during operation, so they need to be cooled down. The heat dissipation efficiency of the battery module's heat sink directly affects the working efficiency and lifespan of the battery module. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a heat sink for a sodium-ion battery module and a sodium-ion battery module, wherein the first base and the second base cooperate to have good heat dissipation efficiency, which is beneficial to improving the charging and discharging efficiency of the battery module.

[0004] This utility model provides a heat sink for a sodium-ion battery module, including a plate body disposed at one end of the battery module in the thickness direction. The plate body includes a first base member and a second base member. The first base member is in contact with the end face of the battery module in the thickness direction and extends along the length direction of the battery module. At least two first base members are spaced apart in the width direction of the battery module. The first base member is connected to a gravity heat pipe to achieve heat exchange with the battery module. The second base member is disposed between two adjacent first base members. At least two second base members are spaced apart in the length direction of the battery module. The second base member can achieve heat exchange with the external environment.

[0005] In one embodiment, a ventilation hole is provided on the second base member, the ventilation hole extending through the second base member along the length direction of the battery module, and air or cooling air can circulate in the ventilation hole.

[0006] In one embodiment, a wind source is installed at one end of the second base member, and the wind source is capable of outputting cooling air.

[0007] In one embodiment, the diameter of the ventilation hole near the air source is larger than the diameter of the ventilation hole away from the air source.

[0008] In one embodiment, the ventilation holes on two adjacent second base members do not completely overlap.

[0009] In one embodiment, the thickness of the first base member is greater than that of the second base member, so that the end of the first base member near the battery module protrudes from the second base member. When the plate is mounted on one side of the battery module in the thickness direction, a ventilation gap is left between the second base member and the end face of the battery module.

[0010] In one embodiment, the size of the ventilation gap near the center of the battery module is larger than the size of the ventilation gap away from the center of the battery module.

[0011] In one embodiment, the second base extends along the width direction of the battery module, and the second base is perpendicularly connected to the first base.

[0012] In one embodiment, at least one end of the first base member along the width direction of the battery module is connected to a heat dissipation fin, the thickness of the heat dissipation fin is the same as that of the first base member, and the heat dissipation fin is in contact with one end face of the battery module in the thickness direction.

[0013] This utility model also proposes a sodium-ion battery module, including a battery module and the aforementioned heat sink for the sodium-ion battery module, wherein the plate is disposed at one end of the battery module in the thickness direction.

[0014] The beneficial effects of this utility model are as follows:

[0015] During operation, the battery module generates heat, which is transferred to the first base component, heating the gravity heat pipe. The heat-conducting medium inside the gravity heat pipe vaporizes and absorbs heat, carrying away the heat generated by the battery module. After the vaporized heat-conducting medium reaches the cold end of the gravity heat pipe, it condenses and liquefies, and then returns to the heat-absorbing end of the gravity heat pipe under the action of gravity. This cycle is repeated to achieve cooling of the battery module.

[0016] For battery modules, different parts generate different amounts of heat. The gravity heat pipe absorbs different amounts of heat at corresponding locations in different parts of the battery module, resulting in different degrees of vaporization of the heat transfer medium. This leads to temperature differences in different parts of the battery module. The second base component can support the first base component and exchange heat with the external environment. For the parts of the battery module with higher temperatures, the second base component can assist the gravity heat pipe in heat dissipation to improve heat dissipation efficiency, thereby ensuring the uniformity and consistency of heat dissipation in the battery module. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the connection between the plate and the battery module according to an embodiment of the present invention;

[0019] Figure 2 This is a partial structural diagram of the plate body according to an embodiment of the present utility model;

[0020] Figure 3 for Figure 1 A magnified view of a portion of the image.

[0021] In the picture:

[0022] 10-Board; 11-First base component; 111-Heat dissipation fins; 12-Second base component; 121-Ventilation hole; 13-Gravity heat pipe; 14-Air source; 20-Battery module. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0024] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0025] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “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 is in use. They are used only for the convenience of description and simplification, 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.

[0026] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0027] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0028] Combination Figure 1 and Figure 2 The heat sink for a sodium-ion battery module proposed in this utility model includes a plate 10, which is disposed at one end of the battery module 20 in the thickness direction. The plate 10 includes a first base 11 and a second base 12. The first base 11 is in contact with the end face of the battery module 20 in the thickness direction and extends along the length direction of the battery module 20. At least two first bases 11 are spaced apart in the width direction of the battery module 20. The first base 11 is connected to a gravity heat pipe 13 to achieve heat exchange with the battery module 20. The second base 12 is disposed between two adjacent first bases 11 and at least two second bases 12 are spaced apart in the length direction of the battery module 20. The second base 12 can achieve heat exchange with the external environment.

[0029] During operation, the battery module 20 generates heat, which is transferred to the first base 11, causing the gravity heat pipe 13 to be heated. The heat-conducting medium inside the gravity heat pipe 13 vaporizes and absorbs heat, which can carry away the heat generated by the battery module 20. After the vaporized heat-conducting medium reaches the cold end of the gravity heat pipe 13, it condenses and liquefies, and then returns to the heat-absorbing end of the gravity heat pipe 13 under the action of gravity. This cycle is repeated to achieve cooling of the battery module 20.

[0030] For the battery module 20, since different parts of it generate different amounts of heat, the gravity heat pipe 13 absorbs different amounts of heat at corresponding positions in different parts of the battery module 20, resulting in different degrees of vaporization of the heat transfer medium. This leads to temperature differences in different parts of the battery module 20. The second base component 12 can support the first base component 11 and exchange heat with the external environment. For the parts of the battery module 20 with higher temperatures, the second base component 12 can assist the gravity heat pipe 13 in dissipating heat, thereby improving heat dissipation efficiency and ensuring the uniformity and consistency of heat dissipation in the battery module 20.

[0031] In one alternative, the plate 10 is made of aluminum alloy to ensure that the plate 10 has good thermal conductivity.

[0032] In one of the alternative solutions, such as Figure 2 As shown, at least two second base members 12 extend along the width direction of the battery module 20, that is, the second base members 12 are perpendicularly connected to the first base member 11.

[0033] Optionally, the width of the second base 12 can be set according to the actual heat dissipation requirements. For example, for the battery module 20, the temperature in the middle is greater than that on both sides. In order to make the heat dissipation capacity in the middle stronger, the width of the second base 12 near the middle of the battery module 20 can be set to be larger, so as to cooperate with the gravity heat pipe 13 to achieve efficient heat dissipation, thereby ensuring the temperature balance of the battery module 20.

[0034] In one of the alternative solutions, such as Figure 3 As shown, at least one end of the first base 11 along the width direction of the battery module 20 is connected to a heat dissipation fin 111. The thickness of the heat dissipation fin 111 is the same as the thickness of the first base 11, and the heat dissipation fin 111 can contact one end face of the battery module 20 in the thickness direction to cooperate with the gravity heat pipe 13 to achieve heat dissipation.

[0035] Optionally, the length of the heat dissipation fins 111 near the middle of the battery module 20 is greater than the length of the heat dissipation fins 111 far from the middle of the battery module 20, so as to improve the heat dissipation efficiency of the middle of the battery module 20.

[0036] Optionally, heat dissipation fins 111 are symmetrically arranged at both ends of the first base member 11 along the width direction of the battery module 20.

[0037] In one of the alternative solutions, such as Figure 2 As shown, a ventilation hole 121 is provided on the second base component 12. The ventilation hole 121 extends through the second base component 12 along the length direction of the battery module 20. Air or cooling air can circulate inside the ventilation hole 121 to improve the heat exchange capacity between the second base component 12 and the external environment.

[0038] Optionally, such as Figure 1 As shown, a fan source 14 is installed at one end of the second base component 12. The fan source 14 can output cooling air to cooperate with the second base component 12 to improve the heat exchange efficiency between the second base component 12 and the external environment. The fan source 14 can be a multi-speed fan to adjust the intensity of the cooling air according to different heat dissipation requirements.

[0039] Optionally, such as Figure 2 As shown, the ventilation hole 121 is configured such that the diameter of the ventilation hole 121 at the end closer to the air source 14 is smaller than the diameter of the ventilation hole 121 at the end farther from the air source 14. With this configuration, the airflow through the ventilation hole 121 at the end closer to the air source 14 is less, while at the end farther from the air source 14, the airflow through the ventilation hole 121 increases because the cooling air absorbs heat. The greater ventilation volume can remove more heat, thereby enabling the temperature of the battery module 20 to be more balanced.

[0040] In one of the alternative solutions, such as Figure 3As shown, the thickness of the first base 11 is greater than that of the second base 12, so that the first base 11 protrudes from the second base 12 at one end near the battery module 20. When the plate 10 is installed on one side of the battery module 20 in the thickness direction, the first base 11 contacts the end face of the battery module 20, while a ventilation gap is left between the second base 12 and the end face of the battery module 20. The ventilation gap allows the second base 12 to assist the first base 11 in heat dissipation without being affected by the battery module 20.

[0041] Optionally, the ventilation gap near the center of the battery module 20 is larger than the ventilation gap away from the center of the battery module 20. That is, the distance from the second base 12 near the center of the battery module 20 to the end face of the battery module 20 is greater than the distance from the second base 12 away from the center of the battery module 20 to the end face of the battery module 20. This allows a larger airflow to pass through the center of the battery module 20, thereby removing more heat and preventing the temperature in the center from being higher than that at the edges, which helps to ensure the temperature balance of the battery module 20.

[0042] Optionally, such as Figure 2 As shown, the ventilation holes 121 are configured such that the ventilation holes 121 on two adjacent second base members 12 do not completely overlap. With this configuration, the cooling air in the ventilation holes 121 can enter the ventilation gap to increase the path length of the cooling air and thus improve the heat dissipation efficiency.

[0043] Furthermore, each second base 12 has one ventilation hole 121, and all the ventilation holes 121 on the second base 12 are arranged in a V-shape, with the tip of the V pointing towards the first base 11, so as to adjust the temperature according to the working requirements of the battery module 20.

[0044] Reference Figure 1 The present invention also proposes a sodium-ion battery module, including a battery module 20 and the aforementioned heat sink for the sodium-ion battery module. The plate 10 is arranged at one end of the battery module 20 in the thickness direction and can exchange heat with the end face of the battery module 20 in the thickness direction to ensure that the battery module 20 is at a suitable temperature.

[0045] In one alternative, temperature sensors are installed at the battery module 20 to detect the cell temperature at different locations. Based on the detection results of the temperature sensors, the intensity of the cooling air output by the air source 14 can be adjusted in real time to ensure the temperature consistency of the battery module 20 and avoid the energy consumption problem caused by the air source 14 continuously outputting strong cooling air, which is beneficial to energy saving.

[0046] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A heat sink for a sodium-ion battery module, characterized in that, The battery module (20) includes a plate (10) disposed at one end in the thickness direction of the battery module (20). The plate (10) includes a first base (11) and a second base (12). The first base (11) is in contact with the end face of the battery module (20) in the thickness direction. The first base (11) extends along the length direction of the battery module (20). At least two first bases (11) are spaced apart in the width direction of the battery module (20). The first base (11) is connected to a gravity heat pipe (13) to achieve heat exchange with the battery module (20). The second base (12) is disposed between two adjacent first bases (11). At least two second bases (12) are spaced apart in the length direction of the battery module (20). The second base (12) can achieve heat exchange with the external environment.

2. The heat sink for a sodium-ion battery module of claim 1, wherein, The second base (12) has a ventilation hole (121) which extends through the second base (12) along the length of the battery module (20) and allows air or cooling air to circulate within it.

3. The heat sink for a sodium-ion battery module of claim 2, wherein, One end of the second base (12) is equipped with an air source (14), which is capable of outputting cooling air.

4. The heat sink for a sodium-ion battery module of claim 3, wherein, The diameter of the ventilation hole (121) near the air source (14) is larger than the diameter of the ventilation hole (121) away from the air source (14).

5. The heat sink for a sodium-ion battery module of claim 3, wherein, The ventilation holes (121) on two adjacent second base members (12) do not completely overlap.

6. The heat sink for a sodium-ion battery module of claim 1 or 3, wherein, The thickness of the first base (11) is greater than that of the second base (12) so that the end of the first base (11) near the battery module (20) protrudes from the second base (12). When the plate (10) is installed on one side of the battery module (20) in the thickness direction, a ventilation gap is left between the second base (12) and the end face of the battery module (20).

7. The heat sink for a sodium-ion battery module of claim 6, wherein, The size of the ventilation gap near the center of the battery module (20) is larger than the size of the ventilation gap away from the center of the battery module (20).

8. The heat sink for a sodium-ion battery module of claim 1, wherein, The second base (12) extends along the width direction of the battery module (20) and is perpendicularly connected to the first base (11).

9. The heat sink for a sodium-ion battery module of claim 1, wherein, The first base (11) is connected to at least one end of the battery module (20) along the width direction with a heat dissipation fin (111). The thickness of the heat dissipation fin (111) is the same as that of the first base (11), and the heat dissipation fin (111) is in contact with one end face of the battery module (20) in the thickness direction.

10. A sodium-ion battery module, characterized in that, Includes a battery module (20) and a heat sink for a sodium-ion battery module as claimed in any one of claims 1 to 9, wherein the plate (10) is disposed at one end of the battery module (20) in the thickness direction.

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