Air-cooled lithium battery system capable of strengthening heat dissipation and weakening domino effect of thermal runaway

Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to an air-cooled lithium battery system capable of enhancing heat dissipation and weakening a thermal runaway domino effect, which comprises an annular connecting cylinder, an inner ring of the annular connecting cylinder is arranged to be a columnar cavity, and one side of the columnar cavity is arranged to be an opening; the turbofan is arranged in the columnar cavity; the battery cell unit is located in the annular cavity of the annular connecting cylinder, and the battery cell unit is arranged on the periphery of the turbofan in the circumferential direction; wherein the battery cell unit comprises a plurality of columnar lithium batteries, the plurality of columnar lithium batteries are arranged in a staggered manner, and the intervals of the columnar lithium batteries are gradually increased along the airflow flowing direction and are distributed in a gradient manner. By adopting a columnar lithium battery gradient cross arrangement structure and a forced air cooling heat dissipation mode, the structure is simple, heat generated by the battery units is more effectively taken away, the heat dissipation efficiency is improved, the stable working state of the battery units is maintained, and the service life of the batteries is prolonged.

Description

Technical Field

[0001] This application belongs to the field of lithium battery technology, specifically relating to an air-cooled lithium battery system that enhances heat dissipation and weakens the thermal runaway domino effect. Background Technology

[0002] With the rapid development of electric vehicles, energy storage systems, and portable electronic devices, lithium batteries have been widely used as a high-performance energy storage solution. Their high energy density, long cycle life, and rapid charge / discharge capabilities make them an ideal choice for power and energy storage. However, lithium batteries generate a large amount of heat during charging and discharging. Insufficient heat dissipation can lead to increased battery temperature, affecting battery performance, shortening lifespan, and even causing thermal runaway and safety issues.

[0003] Air cooling technology is widely used for heat dissipation in lithium battery packs due to its simple structure, low cost, and high safety. However, air cooling systems have some limitations. First, air has a low specific heat capacity and thermal conductivity, resulting in limited heat dissipation efficiency and difficulty in handling high heat loads. Second, traditional air cooling systems have poor heat dissipation uniformity, easily leading to uneven temperature distribution within the battery pack and the formation of localized hot spots. Furthermore, the heat dissipation efficiency of traditional air cooling systems is greatly affected by ambient temperature, and its heat dissipation capacity further decreases in high-temperature environments. These limitations make traditional air cooling systems inadequate for the heat dissipation requirements of high-rate discharge and large-scale battery packs. Therefore, developing a safe lithium battery module with efficient heat dissipation and a simple structure is crucial for improving battery performance and reducing battery costs. Summary of the Invention

[0004] The technical problem this invention aims to solve is that existing air-cooled battery systems are unable to cope with the heat dissipation requirements of high-rate discharge and large-scale battery packs, resulting in low heat dissipation efficiency.

[0005] Therefore, the present invention provides an air-cooled lithium battery system that enhances heat dissipation and weakens the thermal runaway domino effect.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A wind-cooled lithium battery system that enhances heat dissipation and mitigates the thermal runaway domino effect includes,

[0008] An annular connecting cylinder, wherein the inner ring of the annular connecting cylinder is configured as a cylindrical cavity, and one side of the cylindrical cavity is configured as an opening;

[0009] A turbine fan, wherein the turbine fan is disposed within a cylindrical cavity;

[0010] A battery cell unit, wherein the battery cell unit is located in the annular cavity of the annular connecting cylinder, and the battery cell unit is circumferentially arranged around the turbine fan;

[0011] The battery cell unit includes multiple cylindrical lithium batteries, which are arranged in a staggered pattern, and the spacing between the cylindrical lithium batteries gradually increases along the airflow direction, presenting a gradient distribution.

[0012] Furthermore, the heat dissipation of the gradient-spaced cylindrical lithium battery satisfies: Where cell temperature is the average temperature of the inlet and outlet airflow of the cell, Pr w To determine the Prandtl number based on the average wall temperature monitored by the temperature sensor, Pr f The Prandtl number is calculated based on the average fluid temperature. The Re number depends on the average flow velocity at the minimum flow cross section of the cross-shaped columnar lithium battery. The characteristic length is taken as the outer diameter of the columnar lithium battery. s1 is the distance between two columnar lithium batteries perpendicular to the airflow direction, s2 is the distance between two columnar lithium batteries along the airflow direction, gr is the gradient of the spacing of the columnar lithium batteries along the airflow direction, and a, b, c, d, e, and g are power exponents obtained through experimental or simulation fitting.

[0013] Furthermore, the cell unit also includes metal foam, which is located on both sides of the plurality of cylindrical lithium batteries in the corresponding cell unit.

[0014] Furthermore, the thickness h of the metal foam gradually increases along the airflow direction.

[0015] Furthermore, the metal foam is made of a material with high thermal conductivity.

[0016] Furthermore, the cell unit also includes a heat insulation plate, which is located on the side of the metal foam away from the cylindrical lithium battery. The heat insulation plate is made of a material with low thermal conductivity or a material with phase change heat absorption function.

[0017] Furthermore, the battery cell unit also includes a grille located on the side of the insulation plate away from the metal foam, and multiple battery cell units are connected together by the grille and bolts.

[0018] Furthermore, a turbulence unit is fixedly connected to the bolt by a snap fastener.

[0019] Furthermore, an air duct is connected to the open side of the cylindrical cavity on the annular connecting cylinder. The air duct communicates with the cylindrical cavity, and the inner diameter of the end of the air duct near the annular connecting cylinder is smaller than that of the other end.

[0020] Furthermore, it also includes a temperature sensor and a PWM controller. The temperature sensor is used to monitor the temperature of the battery cell, and the temperature sensor is electrically connected to the PWM controller, which is electrically connected to the turbine fan.

[0021] The beneficial effects of this invention are that, by adopting a columnar lithium battery gradient cross-arrangement structure and a forced air cooling method, this invention can more effectively remove the heat generated by the battery cell, thereby improving the heat dissipation efficiency, helping to keep the battery cell working within a suitable temperature range, maintaining the stable working state of the battery cell, reducing performance degradation caused by overheating, and extending the battery's service life.

[0022] By gradually thickening the metal foam along the airflow direction, the heat dissipation effect on the airflow outlet side is enhanced, and the overall temperature uniformity of the battery module is improved.

[0023] The ventilation channels between the heat insulation plates are connected to the air ducts of the cooling fan. Through the flow channel design, uniform heat dissipation of the battery cells is achieved, avoiding local overheating and improving the safety and reliability of the battery module. It has a high energy density and helps to reduce the size and weight of the battery module, making it suitable for applications with space and weight constraints. The heat insulation plates also prevent the spread of lithium battery thermal runaway to other module units, weakening the domino effect of lithium battery thermal runaway and improving lithium battery safety.

[0024] The detachable modular battery ring module unit structure design simplifies the battery module manufacturing process, while also facilitating battery unit maintenance and replacement, thus reducing maintenance costs. Effective heat dissipation control reduces thermal stress on the battery units, which helps improve battery cycle life and increases the economic efficiency of the battery module.

[0025] The battery module design of this invention is suitable for various low-power applications, such as portable electronic devices, small electric vehicles, and energy storage systems, and has broad market application prospects. It can operate stably over a wider range of ambient temperatures, improving the environmental adaptability of the battery module. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 A front view of an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0028] Figure 2 A side view of an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect when powered by a fan.

[0029] Figure 3 A side view of an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect when using a fan-exhaust air supply.

[0030] Figure 4A schematic diagram illustrating the connection method of multiple battery modules in a wind-cooled lithium battery system with forced air supply, designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0031] Figure 5 A schematic diagram illustrating the connection method of multiple battery modules in an air-cooled lithium battery system with an extraction air supply, designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0032] Figure 6 A schematic diagram of the arrangement of cylindrical lithium batteries in a cell unit within a battery module of an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0033] Figure 7 A schematic diagram of another arrangement of cylindrical lithium batteries in a cell unit within a battery module of an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0034] Figure 8 A schematic diagram of the arrangement of cylindrical lithium batteries in a cell unit within a battery module of an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0035] Figure 9 A schematic diagram of another arrangement of cylindrical lithium batteries in a cell unit within a battery module in an air-cooled lithium battery system designed to enhance heat dissipation and mitigate the thermal runaway domino effect.

[0036] In the diagram: 1. Turbine fan; 2. Turbine fan blades; 3. Inlet side of the battery cell unit; 4. Inner wall of the annular connecting cylinder; 5. Outer wall of the annular connecting cylinder; 6. Metal foam; 7. Grille; 8. Columnar lithium battery; 9. Heat insulation plate; 10. Battery cell unit; 11. Air duct; 12. Temperature sensor; 13. PWM controller; 14. Fluctuation element; 15. Battery annular module unit; 16. Bolt; 17. Wiring harness hole; 18. Columnar cavity; 19. Annular cavity seal. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] A wind-cooled lithium battery system that enhances heat dissipation and weakens the thermal runaway domino effect includes an annular connecting cylinder, a battery module unit 15, a cell unit 10, a turbine fan 1, an air duct 11, and a PWM controller 13.

[0041] The inner ring of the annular connecting cylinder is configured as a cylindrical cavity 19. The turbine fan 1 is located within the cylindrical cavity 19. The annular battery module unit 15 includes multiple battery cell units 10, which are located within the annular connecting cylinder (the battery cell units 10 are fixedly connected to the annular cavity formed between the inner wall 4 and the outer wall 5 of the annular connecting cylinder) and are circumferentially arranged around the turbine fan 1. Multiple ventilation openings are provided on both the inner wall 4 and the outer wall 5 of the annular connecting cylinder, corresponding to the battery cell units 10. The turbine fan 1 supplies air to the annular battery module unit 15 using either a forced-in or extracted method. Figure 2 and Figure 3 As shown.

[0042] It should be noted that the cell unit 10 is inserted into the inner wall 4 of the annular connecting cylinder. Each cell unit 10 can be disassembled individually and removed from the annular battery module unit 15 by plugging and unplugging for subsequent battery module maintenance.

[0043] A duct 11 connects the turbine fan 1 to the annular battery module unit 15, such as... Figure 2 and Figure 3 As shown, the air duct 11 is coaxially arranged with the annular connecting cylinder and communicates with the columnar cavity 19. The air duct 11 is located on one side of the annular connecting cylinder. An annular cavity seal 20 is provided on the side of the annular connecting cylinder away from the air duct 11 to seal the columnar cavity 18 on one side, so as to prevent the airflow from the columnar cavity 18 from being released into the environment when the turbine fan 1 is working.

[0044] The inner diameter of the end of the air duct 11 near the annular connecting cylinder is smaller than that of the other end. Therefore, in the forced air supply arrangement, the airflow forced in by the turbine fan 1 flows into the columnar cavity 18 formed by the inner wall 4 of the annular connecting cylinder in the converging air duct 11. The columnar cavity 18 increases the static pressure of the air, thus improving the uniform distribution of ambient air. The ambient air is evenly distributed into each cell unit 10 of the battery annular module unit 15 to participate in the heat dissipation of the columnar lithium battery 8. In the extraction air supply arrangement, the airflow introduced by the turbine fan 1 flows into the battery annular module unit 15 from the outer wall 5 of the annular connecting cylinder and enters each cell unit 10 to participate in heat exchange. The air that absorbs heat gathers in the columnar cavity 18 formed by the inner wall 4 of the annular connecting cylinder and is discharged into the ambient air through the expansion air duct 11 and the turbine fan 1. The expansion air duct 11 plays a role in static pressure recovery, reducing flow resistance loss in the air duct and improving the net power of the air-cooled lithium battery system.

[0045] In such Figure 2 The forced air supply shown Figure 3 In the exhaust-type air supply scenario shown, the inner wall 4 of the annular connecting cylinder is the air inlet side of the annular battery module unit 15. In the forced-in air supply scheme, a turbulence element 14 is arranged on the inlet side of the air inlet side 3 of the cell unit. The turbulence element 14 is fixed to the inlet side by a buckle 18. Figure 4 , 5 The bolt shown is secured by clip 18, which allows for easy fixation of the aerodynamic element after the bolt is installed.

[0046] In the exhaust-type air supply scheme, the outer wall 5 of the annular connecting cylinder is the air inlet side, and the outer wall 5 of the annular connecting cylinder is also equipped with a baffle element 14, which is fixed by a buckle 18. Figure 4 , 5 Above the bolt 16 shown, the turbulence element 14 can be a mesh-like structure, a longitudinal vortex blade, or any structure that can improve airflow turbulence.

[0047] The battery cell unit 10 consists of columnar lithium batteries 8 arranged in a staggered gradient along the air inlet side 3 of the battery cell unit to the outer side 5 of the annular connecting cylinder, symmetrically arranged metal foam 6 on the outer side of the columnar lithium batteries 8 within the battery cell unit 10, and a heat insulation plate 9. The metal foam 6 can be made of high thermal conductivity materials such as nickel, aluminum, copper, and graphite. The metal foam 6 has the characteristic of gradually thickening along the airflow direction, such as... Figure 6-7 The pressure-fed air supply cell unit shown, and Figure 7-8 In the extracted air-supply battery cell unit shown, in both air supply methods, the metal foam 6 exhibits a characteristic of gradually thickening along the airflow direction.

[0048] The heat insulation plate 9 can be composed of materials with low thermal conductivity or phase change heat absorption functions, such as epoxy resin, aerogel, hydrogel, and mica board. The air inlet side 3 of the battery cell unit is inserted deep into the inner wall 4 of the annular connecting cylinder. The ambient air provided by the turbine fan 1 enters through the air inlet side 3 of the battery cell unit and flows through the staggered columnar lithium batteries 8 and metal foam 6, carrying away the heat generated by the columnar lithium batteries 8 through convection heat transfer. The heat insulation plate 9 is arranged between adjacent battery cell units 10. When a thermal runaway occurs in one battery cell unit 10, it isolates the heat generated by the thermal runaway from being conducted to the other battery cell units 10, thus avoiding the domino effect of thermal runaway. The columnar lithium batteries 8 inside the battery cell unit 10 are staggered, and their heat dissipation effect is described by the Jukkawski formula considering the gradient spacing of the columnar lithium batteries.

[0049]

[0050] In the formula, the cell temperature is the average temperature of the inlet and outlet airflow of the cell, Pr w To determine the Prandtl number based on the average wall temperature monitored by the temperature sensor, Pr f The Prandtl number is calculated based on the average fluid temperature. The Re number depends on the average flow velocity at the minimum flow cross section of the cross-shaped columnar lithium battery. The characteristic length is taken as the outer diameter of the columnar lithium battery. s1 is the distance between two columnar lithium batteries perpendicular to the airflow direction, s2 is the distance between two columnar lithium batteries along the airflow direction, gr is the gradient of the spacing of the columnar lithium batteries along the airflow direction, and a, b, c, d, e, and g are power exponents obtained through experimental or simulation fitting.

[0051] Figure 4 and Figure 5 The stacking methods of multiple battery ring module units 15 are shown for both forced air supply and extraction air supply, as referenced. Figure 6 Multiple ring-shaped battery module units 15 are connected by bolts 16. Wiring harness holes 17 are provided between the ring-shaped battery module units 15 to facilitate wiring connections between them. After the bolts 16 are tightened around each ring-shaped battery module unit 15, a turbulence-inducing element 14 is fixed to the bolts using clips 18 to enhance the turbulence characteristics of the airflow and improve its heat dissipation performance. The stacked connection of multiple ring-shaped battery module units 15 facilitates rapid disassembly and assembly, forming a modular air-cooled lithium battery system.

[0052] A temperature sensor 12 is arranged inside the battery ring module unit 15. The temperature sensor 12 monitors the temperature change trend inside the battery module unit 15. A PWM controller 13 is set between the temperature sensor 12 and the turbine fan 1. The PWM controller 13 adjusts the power of the turbine fan 1 according to the temperature change inside the battery module unit 15, so that the air volume can meet the heat dissipation requirements at different cell temperatures.

[0053] Figure 5 and Figure 6 Two 8-fork arrangement methods for cylindrical lithium batteries in forced air supply are given, among which... Figure 6 The arrangement consists of two rows of columnar lithium batteries 8 arranged in a staggered pattern along the air inlet side 3 of the battery cell to the outer side 5 of the annular connecting cylinder.

[0054] Figure 7 The arrangement of the columnar lithium batteries 8 is a staggered arrangement of three rows along the air inlet side 3 of the battery cell to the outer side 5 of the annular connecting cylinder. Alternatively, the columnar lithium batteries 8 can be arranged in multiple staggered rows along the airflow direction.

[0055] Figure 8 and Figure 9 Two arrangements of 8-fork layout for cylindrical lithium batteries in the case of extractive air supply are given, among which... Figure 8 The arrangement consists of two rows of columnar lithium batteries 8 arranged in a staggered pattern along the air inlet side 3 of the battery cell to the outer side 5 of the annular connecting cylinder. Figure 9 The arrangement consists of three rows of columnar lithium batteries 8 arranged in a staggered pattern along the air inlet side 3 of the battery cell to the outer side 5 of the annular connecting cylinder.

[0056] Figure 6-9 A schematic diagram of the lithium battery arrangement in the cell unit is given, but the cross-row arrangement method of the present invention is not limited to two-row and three-row arrangements.

[0057] Figure 6-9 The spacing of the cylindrical lithium batteries 8 along the airflow direction is gradient-designed, that is, the spacing between lithium batteries gradually increases along the gas flow direction. This design reduces the number of cylindrical lithium batteries placed in the high-temperature zone on the airflow outlet side, thereby further improving the temperature uniformity of the lithium battery cells.

[0058] In summary, the present invention provides a wind-cooled lithium battery system and method for enhancing heat dissipation and mitigating the thermal runaway domino effect. The system includes a detachable low-power wind-cooled gas battery module, a cell unit 10 that combines enhanced heat transfer and thermal runaway propagation insulation, a turbine fan 1 and an air distribution channel, a temperature sensor 12 and a PWM controller 13.

[0059] The turbine fan 1 is connected to the annular battery module unit via a duct 11. The turbine fan 1 can supply air either by forced in or by extraction. In forced induction, the duct 11 is a converging channel, accelerating the airflow and injecting it into the cylindrical cavity 18 formed by the annular battery module unit. In extraction, the duct 11 becomes an expanding channel, which facilitates static pressure recovery and reduces air resistance loss. Regardless of whether forced or extraction is used, each annular battery module unit has a turbulence-inducing element 14 on its air inlet side. The turbulence-inducing element 14 is fixed to the annular battery module units by bolts 16, which both secure the battery module units and enhance heat transfer through turbulence. The turbulence-inducing element 14 can be a mesh, a longitudinal vortex blade, or any structure that can increase airflow turbulence to enhance heat transfer.

[0060] The cell unit 10 consists of multiple cylindrical lithium batteries 8 arranged in a staggered pattern, with the spacing between the cylindrical lithium batteries 8 gradually increasing along the airflow direction, presenting a gradient arrangement effect. Symmetrically arranged on the outside of the cylindrical lithium batteries 8 are layers of metal foam 6, a heat insulation plate 9, and a grid 7. The metal foam 6 enhances heat transfer; according to the air supply method of the annular battery module, the thickness h of the metal foam 6 gradually increases along the airflow direction. This design ensures better heat dissipation in the high-temperature area at the outlet side, maintaining a certain degree of temperature uniformity. The heat insulation plate 9 prevents the spread of fire in the event of thermal runaway of the lithium battery, and the grid 7 connects and fixes each cell unit 10.

[0061] A temperature sensor 12 is arranged inside the battery ring module unit 15. A PWM controller 13 is set between the temperature sensor 12 and the turbine fan 1. The PWM controller 13 adjusts the power of the turbine fan 1 according to the temperature change inside the battery module unit, so that the air volume can meet the heat dissipation requirements at different cell temperatures.

[0062] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A wind-cooled lithium battery system that enhances heat dissipation and mitigates the thermal runaway domino effect, characterized in that, include, An annular connecting cylinder, wherein the inner ring of the annular connecting cylinder is configured as a cylindrical cavity, and one side of the cylindrical cavity is configured as an opening; A turbine fan, wherein the turbine fan is disposed within a cylindrical cavity; A battery cell unit, wherein the battery cell unit is located in the annular cavity of the annular connecting cylinder, and the battery cell unit is circumferentially arranged around the turbine fan; The battery cell unit includes multiple cylindrical lithium batteries, which are arranged in a staggered pattern, and the spacing between the cylindrical lithium batteries gradually increases along the airflow direction, presenting a gradient distribution.

2. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway as described in claim 1, characterized in that, The heat dissipation performance of the gradient-spaced cylindrical lithium battery meets the following requirements: Where cell temperature is the average temperature of the inlet and outlet airflow of the cell, Pr w To determine the Prandtl number based on the average wall temperature monitored by the temperature sensor, Pr f The Prandtl number is calculated based on the average fluid temperature. The Re number depends on the average flow velocity at the minimum flow cross section of the cross-shaped columnar lithium battery. The characteristic length is taken as the outer diameter of the columnar lithium battery. s1 is the distance between two columnar lithium batteries perpendicular to the airflow direction, s2 is the distance between two columnar lithium batteries along the airflow direction, gr is the gradient of the spacing of the columnar lithium batteries along the airflow direction, and a, b, c, d, e, and g are power exponents obtained through experimental or simulation fitting.

3. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway as described in claim 1, characterized in that, The cell unit also includes metal foam, which is located on both sides of the multiple cylindrical lithium batteries in the corresponding cell unit.

4. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway according to claim 3, characterized in that, The thickness h of the metal foam gradually increases along the direction of airflow.

5. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway according to claim 3, characterized in that, The metal foam is made of a material with high thermal conductivity.

6. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway according to claim 3, characterized in that, The cell unit also includes a heat insulation plate, which is located on the side of the metal foam away from the cylindrical lithium battery. The heat insulation plate is made of a material with low thermal conductivity or a material with phase change heat absorption function.

7. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway according to claim 6, characterized in that, The cell unit also includes a grille located on the side of the insulation plate away from the metal foam, and multiple cell units are connected together by the grille and bolts.

8. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the thermal runaway domino effect according to claim 7, characterized in that, A turbulence unit is fixedly connected to the bolt by a snap fastener.

9. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway according to claim 1, characterized in that, An air duct is connected to the open side of the cylindrical cavity on the annular connecting cylinder. The air duct communicates with the cylindrical cavity, and the inner diameter of the end of the air duct near the annular connecting cylinder is smaller than that of the other end.

10. The air-cooled lithium battery system for enhancing heat dissipation and mitigating the domino effect of thermal runaway according to claim 1, characterized in that, It also includes a temperature sensor and a PWM controller. The temperature sensor is used to monitor the temperature of the battery cell unit. The temperature sensor is electrically connected to the PWM controller, and the PWM controller is electrically connected to the turbine fan.

Images