Air cooling device of cylindrical lithium battery

Abstract

The utility model discloses an air cooling device of a cylindrical lithium battery, which comprises a first visual flow channel, a second visual flow channel, an air rectifying plate, a battery pack and an airflow isolation box body, and the flow channels and the box body are made of transparent materials, so that the airflow distribution and the cooling effect can be conveniently monitored; the air rectifying plate is provided with a plurality of honeycomb strip-shaped hollow structures, so that the air flow path is optimized, and the cooling efficiency is improved; the battery pack device is modularized in structure, has good adaptability and expansibility, and is suitable for distribution of lithium battery packs of different specifications. The device has an effective and efficient heat dissipation function and is suitable for the fields of electric automobiles, energy storage equipment and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of battery heat management, concretely relates to an air cooling device of cylindrical lithium battery. BACKGROUND

[0002] With the wide application of lithium batteries in the field of electric vehicles, energy storage equipment and other fields, the heat management problem of the battery is gradually paid attention to. Especially in the high-power charging and discharging process, lithium batteries will generate a large amount of heat, if the heat cannot be effectively dissipated, it will cause the battery to overheat, affect its service life and safety. The existing lithium battery heat management device mostly adopts liquid cooling or air cooling scheme, but there are problems such as complex structure, uneven heat dissipation efficiency, especially in high-power charging or multi-battery system, a complex cooling system is often needed to ensure the stable work of the battery.

[0003] Therefore, an air-cooled lithium battery heat management device with simple structure, high heat dissipation efficiency and convenient monitoring is needed to realize efficient heat management of cylindrical lithium batteries. SUMMARY

[0004] The main purpose of the utility model is to overcome the defects and deficiencies of the prior art, provide an air cooling device of cylindrical lithium battery, by setting up fixed assembly and its sliding parts, can reduce the wear and tear of the connecting place of the end of the roller and the supporting rod, prolong the service life of the setting component of the papermaking forming net.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of air cooling device of cylindrical lithium battery, including first visual flow channel, second visual flow channel, air rectifier plate, battery pack and airflow isolation box, the first visual flow channel or second visual flow channel includes inlet, outlet and flow guide channel, the flow guide channel adopts closed structure, the inlet of first visual flow channel is not greater than the outlet of first visual flow channel, the inlet of second visual flow channel is not less than the outlet of second visual flow channel, the air rectifier plate is arranged in flow guide channel, and air rectifier plate edge is tightly connected with the inner wall of flow guide channel;The battery pack includes upper fixed plate, lower fixed plate, battery clamp and battery, the surface of the upper fixed plate and lower fixed plate has fixed mechanism or fixed groove, the upper fixed plate and lower fixed plate are placed in the both sides of battery respectively by fixed mechanism or fixed groove, and are fixed by battery clamp clamping, and the battery pack is fixed in airflow isolation box interior;The airflow isolation box includes at least two isolation modules, any isolation module is equipped with outgoing line mechanism, airflow isolation box is provided with flow guide port in two directions, the isolation module is spliced by sealing material or sealing mechanism, airflow isolation box is tightly connected with the outlet of first visual flow channel by first flow guide port, and is tightly connected with the inlet of second visual flow channel by second flow guide port, and outgoing line mechanism is sealed by sealing material after signal line is led out.

[0007] As a preferred technical solution, the first visual flow channel or the second visual flow channel is made of transparent acrylic resin.

[0008] As a preferred technical solution, the airflow isolation box is made of transparent acrylic resin,

[0009] As a preferred technical solution, the air rectifier plate is provided with a plurality of air holes, and the air holes are uniformly distributed on the flow guide surface.

[0010] As a preferred technical solution, the air holes are honeycomb strips.

[0011] As a preferred technical solution, the battery pack has multiple groups, each group has multiple batteries, and the fixed mechanism or the fixed groove of the upper fixed plate and the lower fixed plate is adaptively arranged with the batteries.

[0012] As a preferred technical scheme, a straight line extended from a side length of a tangent plane of the first flow guide port is taken as the y-axis and the z-axis, and a vertical line of the tangent plane of the first flow guide port is taken as the x-axis to establish a rectangular coordinate system, and the direction in which the battery pack is fixed inside the airflow isolation box is parallel to the y-axis or the z-axis along the direction of the battery and perpendicular to the x-axis.

[0013] As a preferred technical scheme, a straight line extended from a side length of a tangent plane of the first flow guide port is taken as the y-axis and the z-axis, and a vertical line of the tangent plane of the first flow guide port is taken as the x-axis to establish a rectangular coordinate system, and the direction in which the battery pack is fixed inside the airflow isolation box is parallel to the x-axis or the z-axis along the direction of the battery and perpendicular to the y-axis.

[0014] As a preferred technical scheme, the tangent plane of the first flow guide port is perpendicular to the tangent plane of the second flow guide port.

[0015] As a preferred technical scheme, the tangent plane of the first flow guide port is parallel to the tangent plane of the second flow guide port.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] (1) The utility model shows good adaptability and expansibility in practical application. Users can adjust the size of the fixed plate or increase the cooling unit according to specific needs to adapt to different specifications of battery pack arrangement. The path design of the cooling airflow is optimized to uniformly cover the surface of the battery and quickly remove heat to prevent local overheating.

[0018] (2) The utility model can be used with a temperature sensor and a monitoring system to accurately monitor the battery temperature and cooling airflow. This design not only improves the intelligent level of the thermal management system, but also provides users with a means to optimize the heat dissipation performance.

[0019] (3) The air-cooled cylindrical lithium ion battery thermal management device of the utility model realizes efficient heat dissipation and reliable operation through reasonable airflow path design and modular structure. The device structure is compact and easy to operate, and is particularly suitable for electric vehicles, energy storage equipment and consumer electronics, providing an important guarantee for the safe and stable operation of high-performance battery packs. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 A whole structure diagram of an air cooling device of a cylindrical lithium battery according to an embodiment of the present application;

[0022] Figure 2 A structure schematic diagram of a battery pack according to an embodiment of the present application;

[0023] Figure 3 A sectional view of an air rectifying plate according to an embodiment of the present application in a direction facing an air outlet.

[0024] In the drawings:

[0025] 1 - first visualized flow channel; 2 - second visualized flow channel; 3 - air rectifying plate; 4 - battery pack; 5 - air flow isolation box; 6 - upper fixed plate; 7 - lower fixed plate; 8 - battery clamp; 9 - battery; 51 - first flow guide opening; 52 - second flow guide opening; 53 - outgoing line mechanism. DETAILED DESCRIPTION

[0026] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work fall within the scope of protection of the present application.

[0027] In the present application, "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be contained in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0028] The present application places the device horizontally based on a general use scenario, takes the air flow isolation box as a reference system, takes the plane tangent to the first flow guide opening 51 as a basic reference surface, that is, takes the extension line of the side length of the plane tangent to the first flow guide opening 51 as the y-axis and the z-axis, and at the same time takes the perpendicular line of the plane tangent to the first flow guide opening 51 as the x-axis to establish a rectangular coordinate system.

[0029] First embodiment

[0030] The air cooling device of the cylindrical lithium battery provided by the embodiment comprises a first visual flow channel 1, a second visual flow channel 2, an air rectifier plate 3, a battery pack 4 and an air flow isolation box 5. The first visual flow channel 1 or the second visual flow channel 2 comprises an inlet, an outlet and a flow guide channel. The flow guide channel adopts a closed structure. The inlet of the first visual flow channel 1 is not larger than the outlet of the first visual flow channel 1. The inlet of the second visual flow channel 2 is not smaller than the outlet of the second visual flow channel 2. The air rectifier plate 3 is arranged in the flow guide channel. The edge of the air rectifier plate 3 is tightly connected with the inner wall of the flow guide channel. The distance between the inlet of the first visual flow channel 1 and the air rectifier plate 3 is a set distance. The battery pack 4 comprises an upper fixed plate 6, a lower fixed plate 7, a battery clamp 8 and a battery 9. The surface of the upper fixed plate 6 and the lower fixed plate 7 is provided with a fixing mechanism or a fixing groove. The upper fixed plate 6 and the lower fixed plate 7 are respectively placed on the two sides of the battery 9 through the fixing mechanism or the fixing groove and are clamped and fixed through the battery clamp 8. The battery pack 4 is fixed in the air flow isolation box 5. The air flow isolation box 5 comprises at least two isolation modules. Any isolation module is provided with a wire outlet mechanism 53. The air flow isolation box 5 is provided with flow guide openings in two directions. The isolation modules are spliced through sealing materials or sealing mechanisms. The air flow isolation box 5 is tightly connected with the outlet of the first visual flow channel 1 through a first flow guide opening 51 and is tightly connected with the inlet of the second visual flow channel 2 through a second flow guide opening 52. The wire outlet mechanism 53 is sealed through sealing materials after leading out a signal line.

[0031] As shown in Figure 1 In the embodiment, in order to constrain the entering air and ensure the flow in the first visual flow channel 1, the size of the inlet of the first visual flow channel 1 is set to be not larger than the size of the outlet. The cross-sectional size of the inlet to the flow guide channel is at least gradually increased. In order to smoothly exhaust and place the gas backflow, the size of the outlet of the second visual flow channel 2 is reduced in the embodiment, that is, the inlet of the second visual flow channel is not smaller than the outlet of the second visual flow channel 2. The size of the flow guide channel to the outlet of the second visual flow channel 2 is at least gradually reduced.

[0032] As shown in Figure 1 and Figure 2 In the embodiment, the flow guide surface of the air rectifier plate 3 is provided with a plurality of honeycomb strip-shaped air holes. The honeycomb strip-shaped air holes are uniformly distributed on the flow guide surface. The edge of the air rectifier plate 3 is tightly connected with the inner side wall of the first visual flow channel 1 through plastic sealing materials. In this way, after the cooling air flow passes through the air rectifier plate 3, the cooling air flow is uniformly distributed in the first visual flow channel 1 and contacts the surface of the battery pack 4 to take away the heat generated by the battery 9 during work. The honeycomb strip-shaped design not only improves the air flow guiding property but also reduces the air flow turbulence and improves the overall cooling efficiency.

[0033] As shown in Figure 3As shown, the upper fixing plate 6 and the lower fixing plate 7 of the battery pack 4 are designed to be detachable, which facilitates adjusting the arrangement mode according to the specifications and quantity of the battery pack 4, thereby adapting to different application scenarios. The surfaces of the upper fixing plate 6 and the lower fixing plate 7 are provided with fixing mechanisms or fixing grooves, and the upper fixing plate 6 and the lower fixing plate 7 are respectively placed on both sides of the battery 9 through the fixing mechanisms or the fixing grooves and clamped and fixed through the battery clamp 8, so as to ensure that the battery 9 remains stable during work and avoids sliding or vibration affecting the test results or operation safety.

[0034] Referring again to Figure 1 , the airflow isolation box 5 is wrapped outside the battery pack 4 to prevent external air disturbance from affecting the cooling effect.

[0035] Referring again to Figure 1 , the airflow isolation box 5 is provided with a wire outlet mechanism 53 in any isolation module, which can be a wire hole or a wire slot, and the specific setting depends on the wire type of the sampling line or the signal line. In addition, after the positive and negative electrodes and the voltage and temperature sampling lines are led out from these places, the gap in the wire outlet mechanism 53 is sealed with a sealing material to ensure the sealing property.

[0036] It should be further pointed out that the sealing material used in the present embodiment and other embodiments can be silicone rubber, fluororubber, ethylene propylene diene rubber (EPDM), acrylate rubber (ACM), thermoplastic elastomer (TPE / TPV), polytetrafluoroethylene (PTFE), and composite materials thereof, and other materials with good high-temperature resistance, corrosion resistance, and insulation.

[0037] Referring again to Figure 1 , the first visual flow channel 1, the second visual flow channel 2, and the airflow isolation box 5 are all made of transparent acrylic resin. Not only is it convenient to observe and monitor the distribution of the cooling airflow, but it also has excellent mechanical strength and thermal stability. This design provides good operability and maintenance convenience for the operation of the cooling system.

[0038] Second embodiment.

[0039] Based on the first embodiment, the present embodiment makes at least one of the following optimization settings to the airflow isolation box 5:

[0040] 1. The shape of the airflow isolation box 5;

[0041] 2. The number and connection mode of the airflow isolation box 5;

[0042] 3. The volume of the airflow isolation box 5;

[0043] 4. The distribution of the airflow isolation box 5;

[0044] 5. The shape of the airflow isolation box 5.

[0045] For optimization setting 1, the embodiment adopts the following preferred settings in any one or a combination of multiple:

[0046] (1) As shown in Figure 1 , in order to facilitate processing and manufacturing, the shape of the airflow isolation box 5 is set to a cuboid, which is integrally formed by isolation material, or tightly spliced by 6 isolation plates and sealing material or sealing mechanism, at least one side of which is provided with an opening for installing the battery pack 4 through a detachable sealing mechanism or adapted to the installation of the battery pack 4.

[0047] (2) The shape of the airflow isolation box 5 can also be set to other regular or irregular cylinders, which is integrally formed by isolation material, or tightly spliced by multiple isolation plates and sealing material, at least one side of which is provided with an opening for installing the battery pack 4 through a detachable sealing mechanism or adapted to the installation of the battery pack 4.

[0048] (3) The shape of the airflow isolation box 5 can also be set to a sphere or an ellipsoid, which is integrally formed by isolation material, or tightly spliced by at least two integrally formed isolation modules and sealing material or sealing mechanism, at least two modules of which are provided with an opening for installing the battery pack 4 through a detachable sealing mechanism or adapted to the installation of the battery pack 4.

[0049] (4) The shape of the airflow isolation box 5 can also be set to a three-pronged cone or other cone, which is integrally formed by isolation material, or tightly spliced by multiple isolation material and sealing material or sealing mechanism, at least two modules of which are provided with an opening for installing the battery pack 4 through a detachable sealing mechanism or adapted to the installation of the battery pack 4.

[0050] (5) The shape of the airflow isolation box 5 can also be set to other boxes with a certain volume, which is integrally formed by isolation material or tightly spliced by at least two sealing materials or sealing mechanisms, at least two sealing materials of which are provided with an opening for installing the battery pack 4 through a detachable sealing mechanism or adapted to the installation of the battery pack 4.

[0051] For optimization setting 2, the embodiment adopts the following preferred settings: at least one airflow isolation box 5 is set according to the actual situation, when the airflow isolation box 5 has multiple, the airflow isolation boxes 5 can be tightly connected through the visualization flow channel with the same size as the flow guide port at both ends, and the connection mode can be series, parallel or a combination of both.

[0052] For the optimization setting 3, the following preferred settings are adopted in this embodiment: the volume of the airflow isolation box 5 is adaptively designed according to the parameters of the size of the battery 9, the shape of the battery 9, the number of the battery 9, the arrangement mode of the battery 9, the size of the battery pack 4, the number of the battery pack 4, and the arrangement mode of the battery pack 4.

[0053] For the optimization setting 4, the following preferred settings are adopted in this embodiment:

[0054] (1) Referring to the first case of the preferred setting 1 again, the guide ports are symmetrically distributed, the first guide port 51 is arranged at the left side of the airflow isolation box 5, and the second guide port 52 is arranged at the corresponding side of the first guide port 51, i.e. the right side of the airflow isolation box 5. Figure 1

[0055] (2) Referring to the first case of the preferred setting 1 again, the guide ports are adjacently distributed, i.e. on the top, bottom, front or back of the airflow isolation box 5.

[0056] (3) Referring to the third case of the preferred setting 1 again, the guide ports are symmetrically distributed, the first guide port 51 is arranged at one end of the airflow isolation box 5, and the second guide port 52 is arranged at the corresponding end away from the first guide port 51.

[0057] (4) Referring to the third case of the preferred setting 1 again, the guide ports are arbitrarily distributed, the first guide port 51 is arranged at one end of the airflow isolation box 5, and the second guide port 52 is arranged at any end different from the first guide port 51, and the second guide port 52 is preferably away from the first guide port 51.

[0058] For the optimization setting 5, the following preferred settings are adopted in this embodiment:

[0059] (1) The guide port is a square or rectangular through hole.

[0060] (2) The guide port is a circular or elliptical through hole, and in the third case of the preferred setting 1, the cutout of the guide port can be parallel to the cross section, or along the direction of a sphere or an ellipsoid.

[0061] (3) The guide port is a through hole of other regular or irregular shapes.

[0062] The third embodiment.

[0063] For the direction in which the battery pack 4 is fixed inside the airflow isolation box 5, this embodiment gives some specific placement methods.

[0064] Specifically, in the case where multiple battery packs 4 are arranged, the battery pack 4 can be arranged as follows:

[0065] ​(1) Parallel to the y-axis and perpendicular to the x-axis in the direction of the battery 9.

[0066] (2) Parallel to the z-axis and perpendicular to the x-axis in the direction of the battery 9.

[0067] (3) Parallel to the x-axis and perpendicular to the y-axis in the direction of the battery 9.

[0068] (4) Parallel to the z-axis and perpendicular to the y-axis in the direction of the battery 9.

[0069] The size, installation position, density and arrangement of the battery pack 4 are adjusted according to the number of batteries and the battery pack 4.

[0070] Preferably, the embodiment adopts the first setting mode.

[0071] In the case of setting a small number of battery packs 4, such as 1-2 groups, the battery pack 4 can adjust the installation position, density and arrangement through the rotatable fixing device.

[0072] The technical features of the above embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0073] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principles of the present application should be considered as equivalent replacement modes and should be included in the protection scope of the present application.

Claims

1. An air cooling device for cylindrical lithium batteries, comprising a first visualized flow channel, a second visualized flow channel, an air rectifying plate, a battery pack and an airflow isolation box, characterized in that, The first or second visual flow channel comprises an inlet, an outlet and a flow guide channel in a closed structure, the inlet of the first visual flow channel is not larger than the outlet of the first visual flow channel, the inlet of the second visual flow channel is not smaller than the outlet of the second visual flow channel, the air flow straightener is arranged in the flow guide channel, and the edge of the air flow straightener is tightly connected with the inner wall of the flow guide channel; the battery pack comprises an upper fixing plate, a lower fixing plate, a battery clamp and a battery, the surface of the upper fixing plate and the lower fixing plate is provided with a fixing mechanism or a fixing groove, the upper fixing plate and the lower fixing plate are respectively placed on the two sides of the battery through the fixing mechanism or the fixing groove and are clamped and fixed through the battery clamp, and the battery pack is fixed in the airflow isolation box; the airflow isolation box comprises at least two isolation modules, any isolation module is provided with a wire outlet mechanism, the airflow isolation box is provided with a flow guide opening in two directions, the isolation modules are spliced through a sealing material or a sealing mechanism, the airflow isolation box is tightly connected with the outlet of the first visual flow channel through the first flow guide opening and is tightly connected with the inlet of the second visual flow channel through the second flow guide opening, and the wire outlet mechanism is sealed through a sealing material after leading out a signal line.

2. The air cooling device for cylindrical lithium batteries according to claim 1, wherein The first or second visual flow channel is made of transparent acrylic resin.

3. The air cooling device for cylindrical lithium batteries according to claim 1, wherein The airflow isolation box is made of transparent acrylic resin.

4. The air cooling device for cylindrical lithium batteries according to claim 1, wherein The flow guide surface of the air flow straightener is provided with a plurality of air permeable holes which are uniformly distributed on the flow guide surface, and the edge of the air flow straightener is tightly connected with the inner side wall of the first visual flow channel through a plastic sealing material.

5. The air cooling device for cylindrical lithium batteries according to claim 4, wherein The air permeable hole is a honeycomb strip.

6. The air cooling device for cylindrical lithium batteries according to claim 1, wherein The battery pack has a plurality of groups, each group has a plurality of batteries, the fixing mechanism or the fixing groove of the upper fixing plate and the lower fixing plate is adaptively arranged with the battery, and the adaptive arrangement comprises battery size, battery shape, battery quantity, battery arrangement mode, battery pack size, battery pack quantity and battery pack arrangement mode.

7. The air cooling device for cylindrical lithium batteries according to claim 6, characterized in that, A straight line with the length of the tangent plane of the first flow guide opening is taken as the y-axis and the z-axis, and a vertical line of the tangent plane of the first flow guide opening is taken as the x-axis to establish a rectangular coordinate system, and the direction of the battery pack fixed in the airflow isolation box is parallel to the y-axis or the z-axis along the direction of the battery and perpendicular to the x-axis.

8. The air cooling device for cylindrical lithium batteries according to claim 6, wherein A straight line with the length of the tangent plane of the first flow guide opening is taken as the y-axis and the z-axis, and a vertical line of the tangent plane of the first flow guide opening is taken as the x-axis to establish a rectangular coordinate system, and the direction of the battery pack fixed in the airflow isolation box is parallel to the x-axis or the z-axis along the direction of the battery and perpendicular to the y-axis.

9. The air cooling device for cylindrical lithium batteries according to claim 1, wherein The tangent plane of the first flow guide opening is perpendicular to the tangent plane of the second flow guide opening.

10. The air cooling device for cylindrical lithium batteries according to claim 1, wherein The tangent plane of the first flow guide opening is parallel to the tangent plane of the second flow guide opening.

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