A heat dissipation structure for a high-capacity cylindrical battery module and the battery module itself.

Abstract

This utility model relates to the field of electric cooling technology, and discloses a heat dissipation structure and battery module for a large-capacity cylindrical battery module. The heat dissipation structure includes: two sets of first hollow cylinders, each sleeved on the outside of two cylindrical single-cell batteries; two sets of liquid cooling channels, each spirally arranged on the outer wall of the two sets of first hollow cylinders, with their ends connected; two sets of second hollow cylinders, each sleeved on the outside of the two sets of liquid cooling channels, the inner wall of the second sleeves, the outer wall of the liquid cooling channels, and the outer wall of the first hollow cylinders forming a spiral airflow channel; a vent located in the middle of the top cover; an air-cooling channel located on the top side wall of the two sets of second hollow cylinders, with its two ends connected to the interior of the two sets of second hollow cylinders, and its top connected to the vent; a fan located inside the vent; and a liquid cooling module connected to the liquid cooling channel. This heat dissipation structure combines air cooling and liquid cooling, enabling efficient heat dissipation of the battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, specifically to a heat dissipation structure and battery module for a large-capacity cylindrical battery module. Background Technology

[0002] With the rapid development of energy storage cell technology, cells are becoming larger in capacity and size, and users are demanding increasingly faster charging and discharging, requiring more sophisticated heat dissipation functions. Liquid cooling and air cooling alone are no longer sufficient to meet the diverse operating conditions required by users. Therefore, a simple structure combining liquid and air cooling perfectly meets current market demands. Furthermore, tightly stacked cylindrical batteries are prone to localized overheating, further exacerbating battery aging and the risk of thermal runaway. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a heat dissipation structure and battery module for a large-capacity cylindrical battery module, thereby solving the heat dissipation problem of large-capacity cylindrical battery modules.

[0004] To achieve the above objectives, this utility model provides a heat dissipation structure for a large-capacity cylindrical battery module, the heat dissipation structure comprising:

[0005] Two sets of first hollow cylinders are respectively fitted onto the outside of two cylindrical single cells;

[0006] Two sets of liquid cooling channels are spirally arranged on the outer walls of the two sets of the first hollow cylinders, and the two ends of the two sets of liquid cooling channels are connected to each other.

[0007] Two sets of second hollow cylinders are respectively fitted on the outside of the two sets of liquid cooling channels. The inner wall of the second hollow cylinder, the outer side of the liquid cooling channel, and the outer wall of the first hollow cylinder cooperate to form a spiral air duct.

[0008] The ventilation opening is located in the middle of the top cover;

[0009] An air-cooling channel is provided on the top side wall of the two sets of second hollow sleeves. The two ends of the air-cooling channel are respectively connected to the interior of the two sets of second hollow sleeves, and the top of the air-cooling channel is connected to the ventilation opening.

[0010] A fan is installed inside the ventilation opening;

[0011] A liquid cooling module is connected to the liquid cooling channel.

[0012] Optionally, the heat dissipation structure further includes an air inlet, which is located at the bottom of two opposite sides of the housing.

[0013] Optionally, an insulating layer is provided between the first hollow cylinder and the individual battery cell.

[0014] Optionally, the first hollow cylinder and the liquid cooling channel are made of aluminum.

[0015] Optionally, the inlet and outlet of the liquid cooling channel are located on two opposite sides of the housing, and the horizontal height of the inlet is higher than that of the outlet.

[0016] Optionally, both the second hollow cylinder and the top cover are made of insulating material.

[0017] On the other hand, this utility model provides a high-capacity cylindrical battery module, the battery module comprising:

[0018] The housing has an open top and two sets of first circular holes at the bottom.

[0019] The top cover is located on the top of the housing. The housing and the top cover are provided with screw holes and are connected by bolts. The top cover is provided with two sets of second circular holes symmetrically.

[0020] Two cylindrical individual cells are arranged in parallel inside the housing, and the terminals of the two cylindrical individual cells extend to the outside of the corresponding second circular hole and the first circular hole, respectively.

[0021] Optionally, the upper surface of the cover is provided with multiple directional channels;

[0022] The lower surface of the housing is provided with multiple directional channels.

[0023] Optionally, the battery module further includes:

[0024] A current collector is installed on the output line of the cylindrical single cell;

[0025] The converter is connected to the current collector;

[0026] A comparator is connected to the converter;

[0027] The channel selector is connected to the comparator, liquid cooling module, and fan.

[0028] Through the above technical solution, this utility model provides a heat dissipation structure and battery module for a large-capacity cylindrical battery module. The liquid cooling channel is spirally arranged around the periphery of the individual battery cells, directly absorbing heat through circulating coolant. An external second hollow cylinder, together with the liquid cooling channel and the first hollow cylinder, forms a spiral air duct. A fan drives airflow into the module from the top vent, spiraling through the air cooling channel, cooling the first hollow cylinder and thus the individual battery cells, while also cooling the coolant within the liquid cooling channel. The synergistic effect of liquid cooling and air cooling, achieved through a double-layer nested structure, enables rapid heat exchange. The double-spiral path enhances heat dissipation efficiency, ensuring stable operation of the two cylindrical individual battery cells. This large-capacity cylindrical battery module heat dissipation structure and battery module structure are simple, adaptable to various operating rates, highly safe, and have a long cycle life.

[0029] Other features and advantages of this utility model embodiment will be described in detail in the following detailed description section. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a schematic diagram of a heat dissipation structure according to one embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of a liquid cooling channel according to one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of an air inlet according to one embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of a battery module according to one embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of a battery module according to one embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures

[0037] 1. First hollow cylinder 2. Liquid cooling channel

[0038] 3. Second hollow cylinder 4. Ventilation opening

[0039] 5. Air-cooled aisle 6. Fan

[0040] 7. Air inlet; 21. Water inlet

[0041] 22. Water outlet 8. Shell

[0042] 9. Top cover; 10. Single battery cell Detailed Implementation

[0043] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0044] In this embodiment of the utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of the components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] like Figure 1 This is a schematic diagram of a heat dissipation structure according to one embodiment of the present invention. Figure 2This is a schematic diagram of a liquid cooling channel according to one embodiment of the present invention. In this diagram, the heat dissipation structure includes a first hollow cylinder 1, a liquid cooling channel 2, a second hollow cylinder 3, a vent 4, an air cooling channel 5, and a fan 6. Two sets of first hollow cylinders 1 are respectively fitted onto the outer sides of two cylindrical single-cell batteries 10. Two sets of liquid cooling channels 2 are spirally arranged on the outer walls of the two sets of first hollow cylinders 1, with their ends connected. Two sets of second hollow cylinders 3 are respectively fitted onto the outer sides of the two sets of liquid cooling channels 2, with the inner walls of the second hollow cylinders 3, the outer sides of the liquid cooling channels 2, and the outer walls of the first hollow cylinders 1 forming a spiral airflow channel. The vent 4 is located in the middle of the upper cover 9. The air cooling channel 5 is located on the top sidewall of the two sets of second hollow cylinders, with its two ends connected to the interior of the two sets of second hollow cylinders, and its top connected to the vent 4. The fan 6 is located inside the vent 4, and the liquid cooling module is connected to the liquid cooling channel 2. The liquid cooling channel 2 is spirally arranged around the periphery of the single cell 10, directly absorbing heat through circulating coolant. The outer second hollow cylinder 3, together with the liquid cooling channel 2 and the first hollow cylinder 1, forms a spiral air duct. The fan 6 drives airflow into the spiral duct from the top vent 4, spiraling through the air cooling channel 5. This process cools the first hollow cylinder 1 and subsequently the single cell 10, while also cooling the coolant within the liquid cooling channel 2. The combined effect of liquid and air cooling, achieved through a double-layer nested structure, enables rapid heat exchange. The double spiral path enhances heat dissipation efficiency, ensuring stable operation of the two cylindrical single cells 10.

[0047] To further accelerate airflow within the hollow cylinder and enhance the cooling effect of the air-cooled channel 5, in this embodiment, the heat dissipation structure also includes an air inlet 7. The location of the air inlet 7 can be various methods known to those skilled in the art; in one example of this invention, such as... Figure 3 As shown, the air inlet 7 is located at the bottom of two opposite sides of the housing 8, and the size of the air inlet 7 should not be larger than the spiral flow channel.

[0048] In this embodiment, considering the need to prevent direct contact between the individual battery 10 and the first hollow cylinder 1, which could cause leakage or short circuit, an insulating layer is provided between the first hollow cylinder 1 and the individual battery 10. The insulating layer is made of a high-temperature resistant and corrosion-resistant material and serves as an electrical isolation layer.

[0049] In this embodiment, the materials for the first hollow cylinder 1 and the liquid cooling channel 2 can be various types known to those skilled in the art. In one example of this utility model, the materials for the first hollow cylinder 1 and the liquid cooling channel 2 can be aluminum. Using aluminum combines high thermal conductivity with lightweight design, allowing for rapid heat dissipation from the individual battery 10 and efficient heat dissipation through the spiral liquid cooling channel 2. Furthermore, aluminum is easily processed into complex flow channel structures, optimizing the coolant flow path.

[0050] In this embodiment, the arrangement of the inlet 21 and outlet 22 of the liquid cooling channel 2 can be various methods known to those skilled in the art. In one example of the utility model, such as... Figure 2 As shown, the inlet 21 and outlet 22 of the liquid cooling channel 2 are located on two opposite sides of the housing 8, with the horizontal height of the inlet 21 being higher than that of the outlet 22. The inlet 21 is located on the higher side of the housing 8, and the outlet 22 is on the lower side, forming a downward gravity flow that causes the coolant to quickly cover the entire spiral liquid cooling channel 2.

[0051] In this embodiment, the materials of the second hollow cylinder 3 and the top cover 9 can be various types known to those skilled in the art. In one example of this utility model, considering the need to ensure the safety of the heat dissipation structure, both the second hollow cylinder 3 and the top cover 9 are made of insulating materials.

[0052] On the other hand, this utility model provides a high-capacity cylindrical battery module, such as... Figure 4 and Figure 5 As shown, the battery module includes a housing 8, a top cover 9, and two cylindrical individual cells 10. The top of the housing 8 is open, and the bottom of the housing 8 has two sets of first circular holes. The top cover 9 is located on the top of the housing 8, and both the housing 8 and the top cover 9 have screw holes. The housing 8 and the top cover 9 are connected by bolts, and the top cover 9 has two sets of second circular holes symmetrically arranged. The two cylindrical individual cells 10 are arranged parallel to each other inside the housing 8, and the terminals of the two cylindrical individual cells 10 extend to the outside of the corresponding second circular holes and first circular holes, respectively.

[0053] In this embodiment, the specific structures of the upper cover 9 and the housing 8 can be various types known to those skilled in the art. In one example of this invention, the upper surface of the upper cover 9 is provided with multiple directional channels, and the lower surface of the housing 8 is provided with multiple directional channels. These directional channels can be used to place connecting pieces and to combine other battery modules.

[0054] In this embodiment, the composition of the battery module can be various as known to those skilled in the art. In one example of this invention, the battery module further includes a current acquisition unit, a converter, a comparator, and a channel selector. The current acquisition unit is located on the output line of the cylindrical cell 10 to acquire the output current of the cylindrical cell 10. The converter is connected to the current acquisition unit and is used to convert the output current into a corresponding voltage. The comparator is connected to the converter and is used to compare the voltage with a preset standard voltage to generate an output voltage based on the comparison result. The channel selector is connected to the comparator, the liquid cooling module, and the fan 6, and is used to activate the liquid cooling module and / or the fan 6 according to the output voltage.

[0055] Through the above technical solution, this utility model provides a heat dissipation structure and battery module for a large-capacity cylindrical battery module. The liquid cooling channel is spirally arranged around the periphery of the individual battery cells, directly absorbing heat through circulating coolant. An external second hollow cylinder, together with the liquid cooling channel and the first hollow cylinder, forms a spiral air duct. A fan drives airflow into the module from the top vent, spiraling through the air cooling channel, cooling the first hollow cylinder and thus the individual battery cells, while also cooling the coolant within the liquid cooling channel. The synergistic effect of liquid cooling and air cooling, achieved through a double-layer nested structure, enables rapid heat exchange. The double-spiral path enhances heat dissipation efficiency, ensuring stable operation of the two cylindrical individual battery cells. This large-capacity cylindrical battery module heat dissipation structure and battery module structure are simple, adaptable to various operating rates, highly safe, and have a long cycle life.

[0056] The optional embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present utility model are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present utility model, various simple modifications can be made to the technical solutions of the embodiments of the present utility model, and these simple modifications all fall within the protection scope of the embodiments of the present utility model.

[0057] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the various possible combinations will not be described separately in this embodiment.

[0058] Furthermore, various different embodiments of this utility model can be combined arbitrarily, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A heat dissipation structure for a large-capacity cylindrical battery module, characterized in that, The heat dissipation structure includes: Two sets of first hollow cylinders are respectively fitted onto the outside of two cylindrical single cells; Two sets of liquid cooling channels are spirally arranged on the outer walls of the two sets of the first hollow cylinders, and the two ends of the two sets of liquid cooling channels are connected to each other. Two sets of second hollow cylinders are respectively fitted on the outside of the two sets of liquid cooling channels. The inner wall of the second hollow cylinder, the outer side of the liquid cooling channel, and the outer wall of the first hollow cylinder cooperate to form a spiral air duct. The ventilation opening is located in the middle of the top cover; An air-cooled channel is provided on the top side wall of the two sets of second hollow cylinders. The two ends of the air-cooled channel are respectively connected to the interior of the two sets of second hollow cylinders, and the top of the air-cooled channel is connected to the ventilation opening. A fan is installed inside the ventilation opening; A liquid cooling module is connected to the liquid cooling channel.

2. The heat dissipation structure according to claim 1, characterized in that, The heat dissipation structure also includes an air inlet, which is located at the bottom of two opposite sides of the housing.

3. The heat dissipation structure according to claim 1, characterized in that, An insulating layer is provided between the first hollow cylinder and the individual battery cell.

4. The heat dissipation structure according to claim 1, characterized in that, The first hollow cylinder and the liquid cooling channel are made of aluminum.

5. The heat dissipation structure according to claim 1, characterized in that, The inlet and outlet of the liquid cooling channel are located on two opposite sides of the shell, and the horizontal height of the inlet is higher than that of the outlet.

6. The heat dissipation structure according to claim 1, characterized in that, Both the second hollow cylinder and the top cover are made of insulating material.

7. A high-capacity cylindrical battery module, characterized in that, The battery module includes: The housing has an open top and two sets of first circular holes at the bottom. The top cover is located on the top of the housing. The housing and the top cover are provided with screw holes and are connected by bolts. The top cover is provided with two sets of second circular holes symmetrically. Two cylindrical individual cells are arranged in parallel inside the housing, and the terminals of the two cylindrical individual cells extend to the outside of the corresponding second circular hole and the first circular hole, respectively.

8. The battery module according to claim 7, characterized in that, The upper surface of the cover is provided with multiple directional channels; The lower surface of the housing is provided with multiple directional channels.

9. The battery module according to claim 7, characterized in that, The battery module also includes: A current collector is installed on the output line of the cylindrical single cell; The converter is connected to the current collector; A comparator is connected to the converter; The channel selector is connected to the comparator, liquid cooling module, and fan.

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