Single battery

Abstract

The utility model discloses a single battery which comprises a roll core, a shell and a plurality of fins, the shell comprises a shell body and a heat conduction layer, the shell body is coated outside the roll core, the heat conduction layer is coated outside the shell body, and the plurality of fins are distributed in the circumferential direction of the heat conduction layer and are fixedly connected with the heat conduction layer. The utility model aims to solve the technical problem that the performance is influenced due to the poor heat dissipation effect of the existing battery.

Description

Technical Field

[0001] This utility model relates to the technical field of battery heat dissipation, and in particular to a single battery cell. Background Technology

[0002] With the rapid development of portable electronic devices, electric vehicles, and energy storage systems, battery technology has seen significant advancements. In recent years, as the demand for high performance and long battery life has increased, battery energy density has also gradually improved. Modern battery research and development focuses not only on increasing capacity and voltage but also on enhancing charge / discharge speed and lifespan to meet the requirements of various usage scenarios. However, with the advancement of battery technology, related thermal management issues have become increasingly prominent.

[0003] Batteries generate heat during charging and discharging, especially at high rates or during continuous operation, where heat buildup can cause a rapid temperature rise. Insufficient heat dissipation can accelerate the aging of battery materials, leading to performance degradation and potentially even safety hazards. Therefore, heat dissipation has become a critical bottleneck in battery technology development.

[0004] Current battery heat dissipation methods still have significant shortcomings. Because heat sources are concentrated inside the battery and the heat dissipation path is relatively long, heat is difficult to transfer to the outside quickly and effectively. Therefore, how to effectively improve battery heat dissipation efficiency remains a crucial challenge for current battery technology. Utility Model Content

[0005] One objective of this invention is to provide a single-cell battery that addresses the technical problem of poor heat dissipation affecting the performance of existing batteries.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a single battery cell, the single battery cell including a core; a shell including a housing and a thermally conductive layer, the housing covering the outside of the core and the thermally conductive layer covering the housing; and multiple fins, the multiple fins being circumferentially distributed around the thermally conductive layer and fixedly connected to the thermally conductive layer.

[0007] Optionally, the fins are strip-shaped, and the width of the end near the heat-conducting layer is greater than the width of the end away from the heat-conducting layer.

[0008] Optionally, the side of the fin facing away from the heat-conducting layer is configured to be wavy or serrated.

[0009] Optionally, the thermally conductive layer has a mounting groove, and the fins include an interconnected mounting part and a heat dissipation part. The mounting part is engaged with the mounting groove, and the heat dissipation part is used to contact the air.

[0010] Optionally, the width of the heat dissipation section in the circumferential direction of the housing is K1, 0.3mm. <K1<0.8mm。

[0011] Optionally, the width of the mounting portion in the circumferential direction of the housing is K2, 0.8 mm. <K2<1.5mm。

[0012] Optionally, the distance H from the side of the fin away from the heat-conducting layer to the bottom of the mounting groove is 0.96 mm. <H<3mm。

[0013] Optionally, the ratio of the distance H from the side of the fin away from the heat-conducting layer to the bottom of the mounting groove to the width K2 of the mounting portion is C, 1.2. <C<2。

[0014] Optionally, the fin includes a first fin and a second fin, the first fin being fixedly connected to the heat-conducting layer, and the second fin being detachably connected to the side of the first fin facing away from the heat-conducting layer.

[0015] Optionally, the fin includes a thermal expansion member. A guide groove is provided on the side of the first fin away from the heat-conducting layer. The second fin is partially located in the guide groove. A thermal expansion member is provided between the bottom surface of the guide groove and the bottom surface of the second fin. The thermal expansion member is used to expand and push the second fin to move along the opening direction of the guide groove when heated.

[0016] Optionally, air guide grooves are provided inside the fins along their length.

[0017] Optionally, a heat dissipation cavity is formed inside the fin, and the heat dissipation cavity is filled with a phase change material.

[0018] Optionally, a liquid cooling pipe is provided between the fins, and the liquid cooling pipe is attached to the heat-conducting layer.

[0019] The beneficial effects of this utility model are as follows:

[0020] Unlike existing technologies, this invention combines multiple fins with a heat-conducting layer, arranged around the core, avoiding reliance on external air or liquid cooling devices, simplifying the traditional heat dissipation system, and significantly improving the battery's heat dissipation performance. The multiple fins, connected to the heat-conducting layer, ensure rapid heat dissipation from the battery's interior. The fins also increase the heat dissipation surface area, effectively preventing temperature buildup under high loads, extending battery life, and improving its safety and stability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1This is an overall schematic diagram of a single battery provided in an embodiment of the present invention;

[0023] Figure 2 This is a top view of a single battery provided in an embodiment of the present utility model;

[0024] Figure 3 This is provided by the embodiment of the present utility model. Figure 2 Enlarged view of region A in the middle;

[0025] Figure 4 These are side views of two different shaped fins provided in this embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of a fin provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the second fin in the deployed state provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the second fin storage state provided in this embodiment of the utility model;

[0029] Figure 8 This is a schematic diagram of another fin structure provided in an embodiment of the present invention;

[0030] Figure 9 This is a partial structural schematic diagram of the liquid cooling pipe and fins provided in an embodiment of the present invention.

[0031] Explanation of icon numbers:

[0032] 20. Roll core;

[0033] 30. Outer shell; 301. Housing; 302. Thermal conductive layer; 3021. Mounting slot;

[0034] 40. Fins; 401. Mounting part; 402. Heat dissipation part; 403. Air guide duct; 404. Heat dissipation cavity; 4041. Phase change material;

[0035] 41. First fin; 411. Guide groove; 42. Second fin; 43. Thermal expansion element;

[0036] 50. Liquid cooling pipe. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1 to 3 As shown, Figure 1 This is an overall schematic diagram of a single battery provided in an embodiment of the present invention. Figure 2 This is a top view of a single battery provided in an embodiment of the present invention. Figure 3 This is provided by the embodiment of the present utility model. Figure 2 A magnified view of region A in the middle.

[0039] This utility model provides a single-cell battery that effectively improves heat dissipation performance through structural optimization. Specifically, in this embodiment, the single-cell battery includes a core 20, a casing 30, and multiple fins 40. The core 20 is covered by the casing 30, which includes a housing 301 and a thermally conductive layer 302. The housing 301 provides mechanical protection for the core 20, while the thermally conductive layer 302 functions to rapidly dissipate the heat generated by the core 20. The thermally conductive layer 302 covers the outside of the housing 301, and through its high thermal conductivity, it rapidly conducts the heat inside the core 20 to the surface of the casing 30, thereby improving heat dissipation efficiency.

[0040] Multiple fins 40, circumferentially distributed around the heat-conducting layer 302, are fixedly connected to the heat-conducting layer 302, further expanding the heat dissipation area. By increasing the contact area between the battery and the external environment, the fins 40 improve airflow and heat dissipation efficiency, allowing heat to be conducted more quickly from the core 20 to the external environment. Through this design, the battery can dissipate heat more efficiently during high-rate charging and discharging or long-term operation, preventing performance degradation or safety hazards caused by localized overheating.

[0041] In this embodiment, the heat dissipation structure of this invention simplifies traditional heat dissipation systems, avoids the complexity of relying on external air-cooling or liquid-cooling devices, and significantly improves the heat dissipation performance of the battery. By combining the thermally conductive layer 302 with the fins 40, it ensures that the heat inside the battery can be quickly dissipated and increases the heat dissipation surface area, thereby effectively avoiding the problem of temperature accumulation in the battery under high load, extending the battery's service life, and improving its safety and stability.

[0042] Furthermore, to improve heat dissipation, the fins 40 are designed in a strip shape, and their geometry features a unique width variation: the width at the end near the heat-conducting layer 302 is greater than the width at the end away from the heat-conducting layer 302. This optimizes the space occupied by the fins 40 in terms of appearance. On the other hand, it significantly improves the actual heat dissipation performance.

[0043] Specifically, the wider end of the fins near the heat-conducting layer 302 facilitates better contact with the heat-conducting layer 302, ensuring that heat conducted from the core 20 to the heat-conducting layer 302 can be efficiently transferred away through the fins 40. Since the heat-conducting layer 302 is the main channel for heat conduction, the wider root of the fins 40 increases the contact area between the fins 40 and the heat-conducting layer 302, thereby improving the efficiency of heat transfer. At the same time, the narrower end of the fins 40 away from the heat-conducting layer 302 not only reduces the overall weight of the fins 40 and the amount of material used, but also increases airflow between the fins 40, promoting faster heat dissipation through convection.

[0044] In this embodiment, the geometrically tapered shape of the fins 40 improves the aerodynamic characteristics during heat dissipation. The narrow ends allow air to flow more smoothly over the surface of the fins 40, reducing airflow resistance and thus enhancing the natural convection cooling effect of the heat dissipation system.

[0045] Further, please refer to Figure 4 , Figure 4 These are side views of two different shaped fins 40 provided in this embodiment of the invention. The surface of the fins 40 is adaptively improved; the side of the fins 40 facing away from the heat-conducting layer 302 is designed to be wavy or serrated. This special surface structure helps to further improve the heat dissipation effect of the battery. By designing the surface of the fins 40 to be wavy or serrated, the surface area of ​​the fins 40 can be significantly increased, thereby enhancing the efficiency of heat dissipation.

[0046] First, the wavy or serrated structure provides more heat dissipation "channels" on the surface of the fins 40. Compared to traditional planar structures, airflow over the wavy or serrated surface creates more vortex effects. These vortex effects facilitate more thorough heat exchange on the fins 40 surface, increasing the efficiency of heat transfer to the outside. Furthermore, the wavy or serrated surface breaks up the laminar flow of air, enhancing convection and allowing heat to be transferred more quickly from the core 20 and the heat-conducting layer 302 into the air.

[0047] Secondly, the irregular surface morphology can also enhance the mechanical strength of the fins 40. With a wavy or serrated structure, the fins 40's bending resistance increases, enabling them to better withstand external impacts or vibrations while maintaining a low weight. Furthermore, the shape and size of the waves or serrations can be adjusted according to actual needs for different battery applications to achieve optimal heat dissipation.

[0048] In this embodiment, by setting the side of the fin 40 away from the heat-conducting layer 302 to be wavy or sawtooth, the heat dissipation performance of the battery is significantly optimized, providing a strong guarantee for the safe and reliable operation of the battery in high-energy-density application scenarios.

[0049] Furthermore, considering the ease of installation of the fins 40, a mounting groove 3021 is provided on the heat-conducting layer 302, and the fins 40 include a mounting part 401 and a heat dissipation part 402 connected to each other. The mounting part 401 is engaged with the mounting groove 3021 on the heat-conducting layer 302, thus achieving a stable fixation between the fins 40 and the heat-conducting layer 302, while the heat dissipation part 402 is exposed to the air for contact with the air in the surrounding environment, thereby achieving efficient heat transfer and dissipation.

[0050] In this embodiment, the snap-fit ​​connection between the mounting slot 3021 and the mounting part 401, compared with the traditional welding or bonding method, not only simplifies the installation process of the fins 40 and reduces manufacturing costs, but also facilitates the maintenance and disassembly of the battery assembly. The modular design is particularly flexible and convenient when it is necessary to replace the fins 40 or maintain the heat dissipation system.

[0051] Furthermore, the mounting groove 3021 increases the contact area between the fins 40 and the thermally conductive layer 302, optimizing the efficiency of heat transfer from the thermally conductive layer 302 to the fins 40. The snap-fit ​​connection ensures the reliability of the fins 40 during long-term operation, preventing them from loosening or falling off due to factors such as vibration, thermal expansion, or mechanical impact, thereby ensuring the long-term stable operation of the battery system.

[0052] Furthermore, structural strength, airflow, and material efficiency are all taken into account. The heat dissipation part 402 has a specific width parameter in the circumferential direction of the outer casing 30, namely, the width of the heat dissipation part 402 is K1, and 0.3mm. <K1<0.8mm。

[0053] Specifically, a width ranging from 0.3mm to 0.8mm is chosen to ensure that the fins 40 maintain sufficient mechanical strength to prevent deformation or breakage due to external forces or thermal expansion and contraction during operation, while also increasing the heat dissipation surface area through optimized dimensions to maximize heat conduction and dissipation efficiency. The size of the width K1 directly affects airflow and convection efficiency. A narrower heat dissipation section 402 (close to 0.3mm) promotes faster airflow through the gaps in the fins 40, increasing air velocity and thus improving heat dissipation efficiency. Conversely, a wider heat dissipation section 402 (close to 0.8mm) increases the contact area with the air, effectively improving heat exchange per unit time.

[0054] In this embodiment, the processing and manufacturing costs of materials have been taken into consideration. If the heat dissipation part 402 is too wide, it may lead to material waste and increase the overall weight of the battery; conversely, if the heat dissipation part 402 is too narrow, it will weaken the structural strength of the fins 40 and increase the risk of breakage or damage. Therefore, a width range of 0.3 mm to 0.8 mm has proven to be the optimal balance between performance, structural strength, and manufacturing cost.

[0055] Furthermore, to ensure the stability of the fin 40 installation, the width of the mounting portion 401 is specifically limited, namely, the width of the mounting portion 401 is K2, ranging from 0.8mm to 1.5mm. This is intended to ensure that the mounting portion 401 has sufficient strength and reliability within the mounting groove 3021, thereby effectively preventing the fin 40 from loosening or detaching during use.

[0056] In this embodiment, during battery operation, the fins 40 will be subjected to certain mechanical stress due to thermal expansion and contraction, vibration, or external forces. If the width of the mounting portion 401 is too small, the fins 40 may not be securely fixed to the heat-conducting layer 302, resulting in reduced heat dissipation efficiency and potentially even safety hazards. Therefore, by limiting the width of the mounting portion 401 to the range of 0.8mm to 1.5mm, the fixing effect of the fins 40 can be guaranteed without affecting the installation or heat dissipation performance due to excessive size.

[0057] Furthermore, considering the dual requirements of heat dissipation efficiency and structural stability, the length of the fin 40 is limited. Specifically, the distance from the side of the fin 40 away from the heat-conducting layer to the bottom of the mounting groove 3021, i.e., the length H of the fin 40, is set between 0.96 mm and 3 mm. Within this range, it not only helps to optimize heat dissipation performance but also ensures that the fin 40 has sufficient mechanical strength and stability during battery operation.

[0058] In this embodiment, from the perspective of heat dissipation efficiency, the length of the fin 40 directly affects its contact area with air. A longer fin 40 can provide a larger heat dissipation surface, which is conducive to quickly conducting heat from the heat-conducting layer to the fin 40, and then the fin 40 dissipates heat into the air through natural convection or forced convection. However, when the fin 40 is too long and is subjected to vibrations, impacts, thermal expansion and contraction, etc., it may bend or break due to insufficient strength, thus affecting the heat dissipation effect and overall safety. Therefore, the present utility model limits the length of the fin 40 between 0.96 mm and 3 mm. This range can not only provide sufficient heat dissipation area, but also ensure that the fin 40 has good anti-mechanical stress ability under various working conditions.

[0059] Further, in order to achieve a balance between heat dissipation performance and structural stability, the ratio of the distance H from the side of the fin 40 facing away from the heat-conducting layer 302 to the bottom of the installation groove 3021 to the width K2 of the installation part 401 is defined as C, and is limited within the range of 1.2 < C < 2. By setting this proportional relationship, it is ensured that the fin 40 can maintain a stable and reliable mechanical connection while having good heat dissipation performance.

[0060] In this embodiment, from the structural perspective, the ratio of H to K2 directly affects the rigidity and anti-deformation ability of the fin 40. A larger H / K2 ratio means that the fin 40 is relatively long with respect to the installation part 401, and is more likely to bend or deform under external force or thermal stress, which may lead to a decrease in heat dissipation efficiency and even affect the overall performance of the battery. An overly small ratio may limit the heat dissipation area of the fin 40 and reduce its contact efficiency with air, thus failing to fully exert the heat dissipation function. Therefore, limiting C between 1.2 and 2 can achieve a good balance between heat dissipation area and structural strength.

[0061] From the perspective of heat dissipation performance, an increase in H helps to increase the heat dissipation surface area of the fin 40, while K2 ensures the firm connection between the fin 40 and the installation groove 3021. When the ratio C is between 1.2 and 2, the fin 40 can provide a sufficiently large heat dissipation area and maintain good mechanical strength, ensuring that it does not loosen or detach under long-term operation or high-load conditions.

[0062] Further, please refer to Figure 5 , Figure 5This is a schematic diagram of the structure of a fin 40 provided in an embodiment of this utility model. The fin 40 can adopt a modular combination structure, and the fin 40 includes a first fin 41 and a second fin 42. The first fin 41 is firmly attached to the heat-conducting layer 302 by a fixed connection, playing a basic role in heat conduction and heat dissipation. The second fin 42 is flexibly combined with the side of the first fin 41 facing away from the heat-conducting layer 302 by a detachable connection. The double-layer fin 40 design not only enhances the heat dissipation effect, but also provides great convenience for the maintenance and performance adjustment of the battery system.

[0063] In this embodiment, the fixed connection between the first fin 41 and the heat-conducting layer 302 ensures that heat can be quickly conducted from the core 20 through the heat-conducting layer 302 to the first fin 41. Since the first fin 41 is closely attached to the heat-conducting layer 302, its main function is to serve as the core component of the heat-conducting structure, responsible for efficiently transferring the heat generated by the core 20.

[0064] Meanwhile, the second fin 42 is detachably connected to the first fin 41, giving the entire heat dissipation system greater flexibility. This allows for flexible adjustments to heat dissipation capacity based on different application requirements or environmental conditions. For example, when the battery is operating under high load or in a high-temperature environment, the second fin 42 can be mounted on the first fin 41 to increase the heat dissipation surface area and further improve heat dissipation performance. In lower load or colder environments, users can choose to remove the second fin 42, thereby simplifying the heat dissipation system and reducing the overall weight of the battery.

[0065] By combining the dual-layer fin structure 40, the first fin 41 provides basic heat dissipation, while the second fin 42 is used to enhance heat dissipation when needed, thereby optimizing the heat dissipation system in terms of performance, flexibility and maintenance.

[0066] Further, please refer to Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the second fin 42 in its deployed state according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the retracted state of the second fin 42 provided in this embodiment of the utility model. To further enhance the adaptive adjustment capability of the fin 40, a dynamic heat dissipation system based on the principle of thermal expansion is designed. A thermal expansion member 43 is introduced into the structure of the fin 40, enabling it to automatically adjust its heat dissipation capability according to temperature changes. Specifically, a guide groove 411 is formed on the side of the first fin 41 facing away from the heat-conducting layer 302, and part of the second fin 42 is located within this guide groove 411. A thermal expansion member 43 is disposed between the bottom surface of the guide groove 411 and the bottom surface of the second fin 42. When the system temperature rises, the thermal expansion member 43 expands, pushing the second fin 42 to move along the opening direction of the guide groove 411, thereby unfolding it from its retracted state.

[0067] In this embodiment, under normal conditions, that is, when the temperature is low, the second fin 42 is housed in the guide groove 411 of the first fin 41, and the overall structure remains compact, effectively reducing the space occupied by the battery.

[0068] When the battery temperature rises, the thermal expansion member 43 senses the temperature change and begins to expand, pressing the second fin 42 to slide outward, gradually unfolding it from within the guide groove 411. As the second fin 42 unfolds, the heat dissipation surface area increases significantly, enhancing airflow and effectively improving the battery's heat dissipation capacity. Through this adaptive adjustment, the system can automatically improve heat dissipation performance under high load or high temperature conditions, preventing battery overheating and ensuring battery safety and operational stability. When the temperature drops, the thermal expansion member 43 contracts, and the second fin 42 gradually retracts into the guide groove 411, returning to its retracted state.

[0069] Based on thermal expansion, the dynamic fins 40 combine automation and intelligent adjustment, not only improving the heat dissipation efficiency of the battery system but also significantly enhancing its adaptability. Without manual intervention or additional mechanical devices, the fins 40 can autonomously adjust their heat dissipation performance according to changes in the battery's internal temperature, enabling the battery system to maintain high efficiency under extreme temperature conditions while optimizing battery lifespan and safety.

[0070] Further, please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of a fin 40 provided in an embodiment of the present invention. Air guide grooves 403 can be formed inside the fin 40 along its length to further enhance heat dissipation performance. By optimizing the airflow path, the contact efficiency between air and the fin 40 is improved, thereby achieving more effective heat dissipation.

[0071] In this embodiment, the air guide slot 403 allows air to form a guiding channel inside the fin 40, flowing along the length of the fin 40. This effectively guides external cold air into the fin 40, actively guiding the airflow to exchange heat with the surface of the fin 40. Simultaneously, the speed and direction of airflow are controlled as it passes through the air guide slot 403, which not only helps increase the contact area between the air and the surface of the fin 40 but also effectively reduces airflow resistance. By optimizing airflow, heat can be conducted more quickly from the fin 40 into the air, ensuring rapid heat dissipation and preventing adverse effects on the battery due to overheating.

[0072] Further, please refer to Figure 8 , Figure 8This is a schematic diagram of another fin 40 provided in this embodiment of the present invention. A heat dissipation cavity 404 can also be formed inside the fin 40, and a phase change material 4041 is filled within the heat dissipation cavity 404. The heat dissipation cavity 404 is designed to provide an effective space for heat storage and release. When the battery is operating, the core 20 generates heat, and the phase change material 4041 in the heat dissipation cavity 404 can quickly absorb and store this heat. The phase change material 4041 undergoes a phase change during heat absorption, thus transitioning between a solid and a liquid state. This process has high energy storage capacity and can effectively alleviate the temperature rise of the battery when the temperature increases, thereby preventing overheating.

[0073] In this embodiment, the use of phase change material 4041 enables the heat dissipation system to have a dynamic thermal regulation mechanism.

[0074] Specifically, when the battery is under high load and the temperature rises, the phase change material 4041 in the heat dissipation cavity 404 absorbs excess heat and undergoes a phase change, reducing the instantaneous temperature of the battery. This heat buffering effect effectively slows down the temperature rise in a short time, protecting the battery from performance loss and safety hazards caused by overheating. Simultaneously, the design of the heat dissipation cavity 404 provides good contact between the phase change material 4041 and the fins 40, allowing heat to be rapidly transferred to the phase change material 4041, thus improving thermal management efficiency.

[0075] As the temperature drops, the phase change material 4041 within the heat dissipation cavity 404 gradually releases the stored heat to maintain the battery temperature within a suitable range. This heat release characteristic ensures that the battery maintains good operating performance under low load or cold environments, avoiding energy loss or slowed chemical reaction rates due to excessively low temperatures.

[0076] In this embodiment, a heat dissipation cavity 404 is formed inside the fin 40 and filled with phase change material 4041, forming an effective thermal management system. This system can not only provide the necessary heat dissipation capacity when the battery is under high load, but also dynamically adjust when the temperature changes, ensuring that the battery maintains the best performance under various working environments.

[0077] Further, please refer to Figure 9 , Figure 9 This is a partial structural diagram of the liquid cooling pipe 50 and fins 40 provided in this embodiment of the invention. A liquid cooling pipe 50 can be disposed between the fins 40, and the liquid cooling pipe 50 is attached to the heat-conducting layer 302. Utilizing the advantages of liquid cooling technology, it ensures effective reduction of battery temperature in high-load or high-temperature operating environments.

[0078] In this embodiment, the liquid cooling pipe 50 forms a highly efficient heat dissipation channel between the fins 40. By tightly attaching the liquid cooling pipe 50 to the thermally conductive layer 302, heat can be rapidly transferred from the battery's heat source (such as the core 20 and the thermally conductive layer 302) to the coolant. After absorbing heat, the coolant in the liquid cooling pipe 50 flows to the radiator or other parts of the cooling system, releasing the heat to the surrounding environment. This closed-loop circulation system achieves active heat dissipation of the battery, avoiding the limitations of traditional passive heat dissipation methods, such as relying solely on air convection or natural heat dissipation.

[0079] Furthermore, the design of the liquid cooling pipe 50 allows for adjustment of the coolant flow rate and temperature according to actual needs, enabling more precise temperature control. When significant heat dissipation is required, the coolant flow rate can be increased to enhance heat exchange efficiency; conversely, under lower loads or temperatures, the flow rate can be appropriately reduced to optimize energy use and lower system energy consumption.

[0080] The bonding between the liquid cooling pipe 50 and the thermally conductive layer 302 ensures the compactness and efficiency of the cooling system. By optimizing the pipe layout, the liquid cooling system can maximize the use of battery space and reduce the footprint of heat dissipation equipment.

[0081] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0082] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0083] Furthermore, the use of terms such as "first" and "second" in this utility model is 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0084] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A single-cell battery, characterized in that, include: Core; The outer casing includes a housing and a thermally conductive layer, the housing covering the outside of the winding core, and the thermally conductive layer covering the housing; Multiple fins are distributed circumferentially around the heat-conducting layer and are fixedly connected to the heat-conducting layer.

2. A single-cell battery according to claim 1, characterized in that, The fins are strip-shaped, and the width of the end near the heat-conducting layer is greater than the width of the end away from the heat-conducting layer.

3. A single-cell battery according to claim 2, characterized in that, The side of the fin facing away from the heat-conducting layer is configured as wavy or serrated.

4. A single-cell battery according to claim 1, characterized in that, The heat-conducting layer has an installation groove, and the fins include an installation part and a heat dissipation part that are connected to each other. The installation part is engaged with the installation groove, and the heat dissipation part is used to contact the air.

5. A single-cell battery according to claim 4, characterized in that, In the circumferential direction of the outer casing, the width of the heat dissipation part is K1, 0.3 mm. <K1<0.8mm。 6. A single-cell battery according to claim 4, characterized in that, In the circumferential direction of the outer casing, the width of the mounting portion is K2, 0.8 mm. <K2<1.5mm。 7. A single-cell battery according to claim 6, characterized in that, The distance H from the side of the fin away from the heat-conducting layer to the bottom of the mounting groove is 0.96 mm. <H<3mm。 8. A single-cell battery according to claim 7, characterized in that, The ratio of the distance H from the side of the fin away from the heat-conducting layer to the bottom of the mounting groove to the width K2 of the mounting portion is C, 1.

2. <C<2。 9. A single-cell battery according to claim 1, characterized in that, The fin includes a first fin and a second fin. The first fin is fixedly connected to the heat-conducting layer, and the second fin is detachably connected to the side of the first fin away from the heat-conducting layer.

10. A single-cell battery according to claim 9, characterized in that, The fin includes a thermal expansion member. The first fin has a guide groove on the side away from the heat-conducting layer. The second fin is partially located in the guide groove. The thermal expansion member is disposed between the bottom surface of the guide groove and the bottom surface of the second fin. The thermal expansion member is used to expand and push the second fin to move along the opening direction of the guide groove when heated.

11. A single-cell battery according to any one of claims 1-10, characterized in that, The fin has an air guide groove along its length.

12. A single-cell battery according to any one of claims 1-10, characterized in that, The fins have heat dissipation cavities inside, which are filled with phase change material.

13. A single-cell battery according to any one of claims 1-10, characterized in that, A liquid cooling pipe is disposed between the fins, and the liquid cooling pipe is attached to the heat-conducting layer.

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