A cylindrical battery module thermal management system

Abstract

The utility model relates to a kind of cylindrical battery module thermal management system, comprising: composite heat dissipation component, including heat dissipation fin, liquid cooling component, air cooling component and phase change material filling layer, heat dissipation fin is attached to the surface of cylindrical battery module, liquid cooling component includes circulating waterway and condenser, air cooling component includes circulating air duct and cooling fan, circulating waterway and circulating air duct are close to cylindrical battery module setting, phase change material filling layer is set in the internal gap of cylindrical battery module;Intelligent temperature control system includes temperature controller and multiple temperature acquisition heads, multiple temperature acquisition heads are respectively set on the surface of multiple monomer batteries in cylindrical battery module, to obtain temperature information;Temperature controller controls condenser and cooling fan according to temperature information, to dynamically adjust heat dissipation.Fusion air cooling, liquid cooling and phase change material, combine intelligent temperature control system dynamic adjustment heat dissipation intensity, effectively improve heat diffusion uniformity and heat dissipation efficiency, significantly optimize battery temperature stability.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery technology, specifically relating to a thermal management system for cylindrical battery modules. Background Technology

[0002] With the rapid development of new energy technologies, cylindrical battery modules have been widely used in electric vehicles and energy storage systems due to their high energy density and mature manufacturing processes. However, cylindrical battery modules generate a large amount of heat during charging and discharging. If this heat cannot be effectively dissipated, the battery temperature will rise, affecting its performance, lifespan, and safety. Therefore, thermal management of cylindrical battery modules is crucial to ensuring their stable operation.

[0003] Traditional thermal management solutions for cylindrical batteries often employ a single heat dissipation method, such as natural convection cooling or forced liquid cooling. Air cooling relies on natural airflow, resulting in low heat dissipation efficiency and uneven distribution, easily leading to localized hotspots. While liquid cooling systems can improve heat dissipation, their complex piping layout increases manufacturing costs and maintenance difficulty, and the continuously operating cooling components consume significant amounts of energy. Furthermore, some forced air or liquid cooling systems require substantial electrical energy to maintain heat dissipation, which not only reduces the net output of the entire energy system but may also lead to an excessively high proportion of energy consumption for the cooling system during periods of low battery load and low heat generation.

[0004] Therefore, how to achieve efficient and uniform heat dissipation, reduce energy consumption, and simplify the system structure has become a technical challenge that urgently needs to be overcome in the field of cylindrical battery thermal management. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a thermal management system for cylindrical battery modules. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0006] This utility model provides a thermal management system for a cylindrical battery module, comprising: a composite heat dissipation assembly including heat dissipation fins, a liquid cooling assembly, an air cooling assembly, and a phase change material filling layer, wherein the heat dissipation fins are attached to the surface of the cylindrical battery module, the liquid cooling assembly includes a circulating water channel and a condenser, the air cooling assembly includes a circulating air channel and a cooling fan, the circulating water channel and the circulating air channel are both located close to the cylindrical battery module, and the phase change material filling layer is disposed in the internal gap of the cylindrical battery module; and an intelligent temperature control system including a temperature controller and multiple temperature acquisition heads, the multiple temperature acquisition heads being respectively disposed on the surface of multiple individual batteries within the cylindrical battery module to obtain temperature information; the temperature controller controlling the condenser and the cooling fan according to the temperature information to dynamically adjust heat dissipation.

[0007] In one embodiment of the present invention, the cylindrical battery module is provided with a plurality of heat dissipation channels, and the bottom of the cylindrical battery module is provided with a graphite insulating and heat-preserving layer.

[0008] In one embodiment of this utility model, thermally conductive silicone is provided between the heat dissipation fins and the cylindrical battery module.

[0009] In one embodiment of this utility model, the heat dissipation fins are made of aluminum alloy and have a heat dissipation cavity inside, and an injection-molded liquid cooling cavity is provided inside the heat dissipation cavity.

[0010] In one embodiment of this utility model, the temperature acquisition head is an NTC temperature sensor, and multiple NTC temperature sensors are evenly distributed on the surface of multiple individual cells within the cylindrical battery module.

[0011] In one embodiment of this utility model, the condenser and the cooling fan are integrated, the condenser is connected to the circulating water channel, and the cooling fan is connected to the circulating air channel.

[0012] In one embodiment of this utility model, the condenser includes a tube and a plurality of fins, a liquid cooling medium flows through the tube, the tube is connected to the circulating water channel, and the plurality of fins are all connected to the circulating air channel.

[0013] In one embodiment of this utility model, an insulation strip is provided outside the circulating water channel.

[0014] In one embodiment of this utility model, the temperature controller is a pluggable integrated module with a pluggable interface.

[0015] In one embodiment of this utility model, the cylindrical battery module thermal management system further includes a housing, and the composite heat dissipation component, the cylindrical battery module, and the intelligent temperature control system are all disposed within the housing.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model discloses a cylindrical battery module thermal management system that integrates air cooling, liquid cooling, and phase change materials. Combined with an intelligent temperature control system, it dynamically adjusts the heat dissipation intensity, effectively improving heat diffusion uniformity and heat dissipation efficiency, and preventing localized overheating. The modular design simplifies component layout and maintenance processes, reducing system complexity and energy consumption. This solution significantly optimizes battery temperature stability, extends service life, and balances energy saving and reliability, making it suitable for the thermal management needs of cylindrical batteries under high-load scenarios.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a cylindrical battery module thermal management system provided in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the liquid cooling assembly provided in this embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the intelligent temperature control system provided in this embodiment of the utility model;

[0022] Figure 4 This is provided by the embodiment of the present utility model. Figure 3 Schematic diagram of the structure at point I;

[0023] Figure 5 This is a schematic diagram of the heat dissipation channel structure provided in an embodiment of the present invention (first view);

[0024] Figure 6 This is a schematic diagram of the heat dissipation channel structure provided in an embodiment of the present invention (second view);

[0025] Figure 7 This is a schematic diagram of the heat dissipation fins provided in an embodiment of the present invention;

[0026] Figure 8 This is provided by the embodiment of the present utility model. Figure 7 A schematic diagram of the structure at point II.

[0027] Reference numerals: 110-Heat dissipation fins; 111-Heat dissipation cavity; 120-Liquid cooling assembly; 121-Circulating water channel; 122-Condenser; 123-Insulation strip; 124-Water inlet nozzle; 125-Water outlet nozzle; 130-Air cooling assembly; 131-Circulating air channel; 132-Heat dissipation fan; 140-Phase change material filling layer; 210-Temperature controller; 220-Temperature acquisition head; 310-Cylindrical battery module; 311-Heat dissipation channel; 312-Graphite insulation layer; 410-Top cover; 420-Lower casing. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description of a cylindrical battery module thermal management system based on this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0029] The foregoing and other technical contents, features, and effects of this utility model will be clearly presented in the following detailed description of the specific embodiments with reference to the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding can be gained of the technical means and effects adopted by this utility model to achieve the intended purpose. However, the accompanying drawings are only provided for reference and illustration and are not intended to limit the technical solution of this utility model.

[0030] Example 1

[0031] Existing thermal management systems have significant shortcomings, such as uneven heat dissipation leading to accelerated battery aging, excessive system energy consumption reducing energy utilization efficiency, and complex structures increasing the risk of failure and maintenance costs. Therefore, this invention proposes a thermal management system for cylindrical battery modules, such as… Figures 1 to 8 As shown, Figure 1 This is a schematic diagram of the structure of a cylindrical battery module thermal management system provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the liquid cooling assembly provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of the intelligent temperature control system provided in this embodiment of the utility model; Figure 4 This is provided by the embodiment of the present utility model. Figure 3 Schematic diagram of the structure at point I; Figure 5 This is a schematic diagram of the heat dissipation channel structure provided in an embodiment of the present invention (first view); Figure 6 This is a schematic diagram of the heat dissipation channel structure provided in an embodiment of the present invention (second view); Figure 7 This is a schematic diagram of the heat dissipation fins provided in an embodiment of the present invention; Figure 8 This is provided by the embodiment of the present utility model. Figure 7 A schematic diagram of the structure at point II.

[0032] In this embodiment, a thermal management system for a cylindrical battery module includes a composite heat dissipation component and an intelligent temperature control system. The composite heat dissipation component includes heat dissipation fins 110, a liquid cooling component 120, an air cooling component 130, and a phase change material filling layer 140. The heat dissipation fins 110 are attached to the surface of the cylindrical battery module 310. The liquid cooling component 120 includes a circulating water channel 121 and a condenser 122. The air cooling component 130 includes a circulating air duct 131 and a cooling fan 132. The circulating water channel 121 and the circulating air duct 131 are both located close to the cylindrical battery module 310. The phase change material filling layer 140 is disposed in the internal gap of the cylindrical battery module 310. The intelligent temperature control system includes a temperature controller 210 and multiple temperature acquisition heads 220. The multiple temperature acquisition heads 220 are respectively disposed on the surface of multiple individual batteries in the cylindrical battery module 310 to obtain temperature information. The temperature controller 210 controls the condenser 122 and the cooling fan 132 according to the temperature information to dynamically adjust the heat dissipation.

[0033] In an optional embodiment, the composite heat dissipation assembly, the cylindrical battery module 310, and the intelligent temperature control system are all housed within the housing. Specifically, the housing includes an upper cover 410 and a lower housing 420, which are detachably connected to protect the cylindrical battery module 310 from external air, water, and dust, as well as from compression and impact.

[0034] In an optional embodiment, the cylindrical battery module 310 is provided with a plurality of heat dissipation channels 311 to enhance air circulation and improve temperature uniformity.

[0035] For example, multiple heat dissipation channels are provided between the housing or individual cells of the cylindrical battery module 310.

[0036] In one optional embodiment, a graphite insulating layer 312 is provided at the bottom of the cylindrical battery module 310 to provide insulation for the cylindrical battery module 310. Specifically, the graphite material is modified to achieve insulation, such as graphene oxide; when laying the graphite insulating layer 312, it is cut according to the bottom shape of the cylindrical battery module 310, and a vacuum adsorption process is used to make it flat and adhere to the bottom of the cylindrical battery module 310, avoiding wrinkles or bubbles that would affect the heat conduction effect.

[0037] In an optional embodiment, thermally conductive silicone is provided between the heat dissipation fins 110 and the cylindrical battery module 310.

[0038] For example, the heat dissipation fins 110 are made of aluminum alloy and have an internal heat dissipation cavity 111, which significantly increases the surface area in contact with the air. When the cylindrical battery module 310 generates heat during operation, the heat dissipation fins 110 absorb the heat from the surface of the battery module through thermal conduction, and then dissipate the heat to the surrounding air through thermal convection, thereby improving heat dissipation efficiency. In addition, the internal heat dissipation cavity 111 structure can also reduce the weight and increase the structural rigidity.

[0039] Furthermore, an injection-molded liquid cooling cavity is provided within the heat dissipation cavity 111. Specifically, during the manufacturing of the heat dissipation fins 110, an aluminum alloy fin blank is formed by precision die casting using a precision mold, and then it is finely machined using a CNC machining center to ensure the dimensional accuracy and surface quality of the heat dissipation fins 110 and enhance the air convection effect. Inside the heat dissipation fins 110, an injection-molded liquid cooling cavity is formed from engineering plastic using a micro-injection molding process to ensure sealing and pressure resistance. During installation, thermally conductive silicone is used to tightly attach the heat dissipation fins 110 to the outer surface of the cylindrical battery module 310, ensuring efficient heat conduction.

[0040] In an optional embodiment, the condenser 122 and the cooling fan 132 are integrated. The condenser 122 is connected to the circulation channel 121, and the cooling fan 132 is connected to the circulation air duct 131. The cooling fan 132 works in conjunction with the condenser 122 to accelerate airflow. Under the guiding circulation effect of the circulation air duct 131, the air flowing out of the cylindrical battery module 310 flows back to the condenser 122 through the circulation air duct 131. The condenser 122 then cools or heats the air before it flows back to the cylindrical battery module 310.

[0041] In one optional embodiment, the condenser 122 includes tubes and multiple fins. A liquid cooling medium flows through the tubes, which are connected to a circulating water channel 121. All the fins are connected to a circulating air channel 131. When the cylindrical battery module 310 generates heat, the liquid cooling medium is transferred to the fins of the condenser 122, significantly improving heat dissipation efficiency by increasing the contact area with the air.

[0042] For example, the liquid cooling medium can be an aqueous solution of ethylene glycol as the circulating medium, and the circulation can be driven by an external cooling circulation system.

[0043] In an optional embodiment, an insulation strip 123 is provided on the outside of the circulating water channel 121 to insulate the circulating water channel 121 and isolate it from heat.

[0044] In one optional embodiment, the phase change material filling layer 140 uses an organic paraffin-based phase change material, whose phase change temperature matches the battery's operating temperature range. After being heated and melted, the organic paraffin-based phase change material is filled into the gaps of the cylindrical battery module 310 using a vacuum infusion process. The filling amount is adapted to the heating characteristics and application scenario of the cylindrical battery module 310, ensuring that the phase change material can effectively absorb heat without affecting the normal assembly and operation of the cylindrical battery module 310 due to excessive filling. After filling, a curing treatment is performed to ensure the stability of the phase change material within the cylindrical battery module 310.

[0045] In one alternative implementation, the thermostat 210 is a pluggable integrated module with a pluggable interface. The thermostat 210 uses a high-performance microprocessor and has fast data processing and storage capabilities.

[0046] For example, the temperature controller 210 communicates with the temperature acquisition head 220, the liquid cooling assembly 120 and the air cooling assembly 130 via a high-speed CAN (Controller Area Network) bus to ensure timely information exchange and achieve real-time and precise control.

[0047] In one optional embodiment, the temperature acquisition head 220 is an NTC (Negative Temperature Coefficient) temperature sensor, with multiple NTC temperature sensors evenly distributed on the surfaces of multiple individual cells within the cylindrical battery module 310. Temperature sensing is performed independently by multiple NTC temperature sensors, with the total measurement error controlled within ±0.5℃. The multiple NTC temperature sensors are fixed to the surface of the individual cells using an adhesive bonding process, ensuring good contact between the NTC temperature sensors and the surface of the individual cells, thereby accurately measuring the temperature.

[0048] The principle behind this system is that the intelligent temperature control system possesses data processing and storage capabilities. It adjusts the liquid cooling and air cooling flow rates based on real-time temperature information collected by the NTC temperature sensor, such as adjusting the operating power of the condenser 122 and the speed of the cooling fan 132, and coordinating heat dissipation through the circulating water channel 121 and the circulating air channel 131. Simultaneously, the temperature controller 210 adopts a modular integrated design, enabling rapid installation and maintenance through standardized interfaces. For example, when the temperature change is less than or equal to 5°C, air cooling can be activated to meet the heat dissipation requirements; when the temperature change is greater than 15°C, both liquid cooling and air cooling can be activated simultaneously.

[0049] The working process of the cylindrical battery module thermal management system of this utility model is as follows: when the cylindrical battery module 310 needs to be cooled down or heated up, the thermal management system is activated, the liquid cooling medium enters the circulating water channel 121 from the water inlet 124, flows into the condenser 122 along the circulating water channel 121, and the condenser 122 adjusts the temperature of the liquid cooling medium and the surrounding air to achieve cooling down or heating up.

[0050] At this time, the air-cooling component 130 is activated, and the speed of the cooling fan 132 is adjusted by the temperature controller 210 through the command, so that the air flows out through the circulating air duct 131 and then passes through the heat dissipation channel 311 in the cylindrical battery module 310, which promotes uniform temperature distribution. With the circulation of the liquid cooling medium and the assistance of the circulating air duct 131, the temperature of the cylindrical battery module 310 gradually changes until it reaches the preset operating temperature range.

[0051] Meanwhile, the temperature controller 210 monitors temperature changes in real time and automatically adjusts the flow rate of the liquid cooling medium, the speed of the cooling fan 132, and the number of cooling fans 132 that are started, ensuring that the adjustment process is stable and efficient. The cylindrical battery module 310 is heated and cooled by combining liquid cooling circulation and air cooling circulation, so that the cylindrical battery module 310 is kept within a safe operating temperature range.

[0052] After heat exchange, the liquid cooling medium flows out from the water outlet 125 and enters the external cooling circulation system for cooling and reuse.

[0053] It is worth noting that the cylindrical battery module thermal management system of this utility model divides the liquid cooling component 120, the air cooling component 130, and the intelligent temperature control system into independent modules and integrates them in a packaged manner, forming a complete thermal management system. The modular design facilitates installation, disassembly, and maintenance, reducing the complexity of the thermal management system. Furthermore, the cylindrical battery module thermal management system of this utility model can significantly improve the heat dissipation efficiency of cylindrical batteries, extend battery life, and enhance the safety and reliability of the battery system, providing strong support for the development of the new energy industry.

[0054] This utility model discloses a cylindrical battery module thermal management system that integrates air cooling, liquid cooling, and phase change materials. Combined with an intelligent temperature control system, it dynamically adjusts the heat dissipation intensity, effectively improving heat diffusion uniformity and heat dissipation efficiency, and preventing localized overheating. The modular design simplifies component layout and maintenance processes, reducing system complexity and energy consumption. This solution significantly optimizes battery temperature stability, extends service life, and balances energy saving and reliability, making it suitable for the thermal management needs of cylindrical batteries under high-load scenarios.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not expressly listed. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device comprising said element. Terms such as "connected" or "linked" are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect. The orientations or positional relationships indicated by terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0056] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A thermal management system for a cylindrical battery module, characterized in that, include: A composite heat dissipation component includes heat dissipation fins, a liquid cooling component, an air cooling component, and a phase change material filling layer. The heat dissipation fins are attached to the surface of a cylindrical battery module. The liquid cooling component includes a circulating water channel and a condenser. The air cooling component includes a circulating air channel and a cooling fan. The circulating water channel and the circulating air channel are both located close to the cylindrical battery module. The phase change material filling layer is disposed in the internal gap of the cylindrical battery module. The intelligent temperature control system includes a temperature controller and multiple temperature acquisition heads. The multiple temperature acquisition heads are respectively disposed on the surface of multiple individual cells in the cylindrical battery module to obtain temperature information. The temperature controller controls the condenser and the cooling fan according to the temperature information to dynamically adjust the heat dissipation.

2. The cylindrical battery module thermal management system according to claim 1, characterized in that, The cylindrical battery module has multiple heat dissipation channels inside, and a graphite insulating layer is provided at the bottom of the cylindrical battery module.

3. The cylindrical battery module thermal management system according to claim 1, characterized in that, Thermally conductive silicone is provided between the heat dissipation fins and the cylindrical battery module.

4. The thermal management system for a cylindrical battery module according to claim 1, characterized in that, The heat dissipation fins are made of aluminum alloy and have an internal heat dissipation cavity, which contains an injection-molded liquid cooling cavity.

5. The cylindrical battery module thermal management system according to claim 1, characterized in that, The temperature acquisition head is an NTC temperature sensor, and multiple NTC temperature sensors are evenly distributed on the surface of multiple individual cells within the cylindrical battery module.

6. The thermal management system for a cylindrical battery module according to claim 1, characterized in that, The condenser and the cooling fan are integrated, with the condenser connected to the circulating water channel and the cooling fan connected to the circulating air channel.

7. The cylindrical battery module thermal management system according to claim 1, characterized in that, The condenser includes tubes and multiple fins. Liquid cooling medium flows through the tubes, which are connected to the circulating water channel. All the multiple fins are connected to the circulating air channel.

8. The thermal management system for a cylindrical battery module according to claim 1, characterized in that, The circulating water channel is equipped with heat insulation strips.

9. The thermal management system for a cylindrical battery module according to claim 1, characterized in that, The temperature controller is a pluggable integrated module with a pluggable interface.

10. The thermal management system for a cylindrical battery module according to claim 1, characterized in that, It also includes an outer casing, in which the composite heat dissipation component, the cylindrical battery module, and the intelligent temperature control system are all housed.

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