Large cylindrical sodium ion cell energy storage equipment

Abstract

The invention relates to the technical field of sodium ion battery cell energy storage, in particular to large cylindrical sodium ion battery cell energy storage equipment which comprises a box body, a battery cell and an air cooling mechanism and further comprises an upper shell, a lower shell, a positioning sleeve, a clamping assembly and a flow guide assembly. By arranging the clamping assembly and the flow guide assembly, heat generated by the battery cell is transferred to the flow guide assembly, so that the heat dissipation area is increased, and the heat dissipation effect is improved; an air channel through which the cooling air flow flows is more finely separated through the flow guide assembly, so that an effect similar to a rectifier is formed, the situation that the cooling air flow forms turbulent flow among the densely arranged battery cells to influence the heat dissipation effect is avoided, and the heat dissipation effect of the cooling air flow on the battery cells is further ensured; and the service life of the battery cell is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sodium ion battery cell energy storage, and in particular to a large cylindrical sodium ion battery cell energy storage device. Background Art

[0002] Battery cell energy storage is a technology that converts electrical energy into chemical energy through electrochemical reactions and stores it, and then converts the chemical energy back into electrical energy when needed. Cylindrical battery cell energy storage is one of the main forms of battery cell energy storage, and the material used to make sodium ion batteries is mainly polyanion materials. Due to their unique structure, polyanion materials give batteries high energy density, long cycle life and high safety, so they are widely used in household energy storage, portable energy storage, industrial and commercial energy storage and other fields.

[0003] During the process of charging or discharging sodium-ion cylindrical battery energy storage devices, the current inside the battery will generate Joule heat, that is, electrical energy is converted into thermal energy. Especially in the case of overcharging or overdischarging, some side reactions will occur inside the battery, such as electrolyte decomposition, etc. These situations will also release a lot of heat. If this heat cannot be dissipated in time, it will easily lead to local temperature rise and form local hot spots on the surface of the battery. These hot spots often accelerate the aging and performance degradation of materials such as polyanions, and even cause thermal runaway. In addition, in densely arranged cylindrical batteries, due to the small gap between each battery cell, the heat dissipation channel is limited, which easily forms a "heat island effect", making it more difficult to dissipate the heat in the middle area. In order to discharge the heat between the battery cells in time, fans and other devices are often used in the prior art to provide forced airflow, which removes the heat between the battery cells through fast-flowing airflow. For example, a heat dissipation device for a cylindrical battery cell lithium battery with publication number CN214013019U, the prior art achieves cooling by combining air cooling and water cooling to force airflow through the gaps between multiple cylindrical battery cells and take away the heat on the surface of the battery cells.

[0004] However, due to the dense arrangement of cells and the complexity of fluid flow, when air flows into the cells, turbulence is likely to form, which will lead to uneven fluid flow, thus affecting the effect of air cooling and further aggravating the accumulation of local heat. This situation is likely to accelerate the aging of materials such as polyanions, thus affecting the normal use of cells and even causing thermal runaway.

[0005] To this end, a large cylindrical sodium ion battery energy storage device is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a large cylindrical sodium-ion battery cell energy storage device, which solves the problem that when the battery cell generates heat during the charging and discharging process, the heat in the middle area is difficult to dissipate due to the dense arrangement of the cylindrical battery cells. The heat of the battery cell is transferred to the guide component through the clamping component, and the guide component is used to expand the heat dissipation area, and multiple adjacent groups of guide components are abutted to separate the air ducts for the flow of cooling air, forming an effect similar to a "rectifier", avoiding the formation of turbulence, ensuring the heat dissipation effect of the cooling airflow, and thus improving the service life of the battery cell.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A large cylindrical sodium ion battery energy storage device comprises a box, a battery and an air cooling mechanism, and also comprises an upper shell, a lower shell, a positioning sleeve, a clamping assembly and a flow guide assembly, wherein the upper shell and the lower shell are both arranged in the box, the upper shell is provided with a plurality of upper mounting grooves, the lower shell is provided with a plurality of lower mounting grooves, an upper air port is provided between every four of the upper mounting grooves, a lower air port is provided between every four of the lower mounting grooves, an air duct for cooling airflow is formed between the lower air port and the upper air port, a plurality of the battery cells are arranged between the upper shell and the lower shell, the positioning sleeve is arranged between the upper shell and the lower shell, a plurality of the clamping assemblies are connected to the positioning sleeve, the flow guide assembly is connected to the clamping assembly, the battery cells are inserted into the positioning sleeve and clamped by the clamping assembly, the plurality of the clamping assemblies move in a direction away from the central axis of the positioning sleeve, and drive the flow guide assembly to move into the air duct formed between the upper air port and the lower air port, and adjacent flow guide assemblies abut against each other to divide the air duct into a plurality of channels.

[0009] Through the above scheme, after the battery cell is inserted into the positioning sleeve, the clamping assembly will provide a certain degree of clamping force to the battery cell, thereby improving the stability of the battery cell installation. On the other hand, the clamping assembly can transfer the heat generated by the battery cell to the guide assembly, and increase the heat dissipation area through the guide assembly to improve the heat dissipation effect; in addition, the guide assembly is directly exposed to the air duct where the cooling airflow flows under the squeezing of the battery cell, so that the cooling air directly acts on the surface of the guide assembly to improve the heat dissipation effect; adjacent guide assemblies are abutted to separate the air duct into multiple smaller channels, forming an effect similar to a "rectifier" to avoid the formation of turbulence, which not only ensures the heat dissipation effect, but also can compress the cross-sectional area of ​​the fluid flow path, thereby accelerating the fluid flow, thereby improving the heat dissipation effect, ensuring the service life and performance of materials such as polyanions, and thereby ensuring the service life of the battery cell.

[0010] Preferably, the lower air outlet is located above the air cooling mechanism, and the upper edge of the upper air outlet is provided with an arc chamfer.

[0011] Through the above scheme, due to the principle of natural rise of hot air flow, there will be a certain temperature difference on the surface of the battery cell, that is, the temperature near the top will be higher than the temperature below. Therefore, the air cooling mechanism is of exhaust type, which can draw air with lower external temperature from the upper air outlet, and then flow through the air duct between multiple groups of battery cells, and finally be discharged from the lower air outlet, so that the cooling air flow first cools the area with higher temperature, ensuring the uniformity of the surface temperature of the battery cell, and at the same time accelerating the outflow of hot air flow between the battery cells. The chamfered edge setting of the upper air outlet can make the air flow smoother.

[0012] Preferably, the side wall of the positioning sleeve is provided with a plurality of sliding grooves, the clamping assembly is connected to the sliding grooves, the clamping assembly includes a clamping plate, a limiting rod and a compression spring, the limiting rod is connected to the positioning sleeve, the clamping plate is connected to the limiting rod, the compression spring is sleeved on the limiting rod, and its two ends are respectively connected to the clamping plate and the positioning sleeve, and the upper end of the clamping plate is provided with an inclined surface.

[0013] Through the above scheme, during the process of inserting the battery cell into the positioning sleeve, the battery cell will push the clamping plate to move through the inclined surface on the upper end of the clamping plate. At the same time, the clamping plate provides a certain clamping force for the battery cell under the action of the compression spring, thereby ensuring the stability of the battery cell installation and improving the safety of the battery cell.

[0014] Preferably, the clamping plate is an arc plate, and the clamping plate is made of metal with high thermal conductivity.

[0015] Through the above solution, the shape of the splint can adapt well to the arc surface of the side of the battery cell, thereby maximizing the contact area, improving the heat dissipation effect, ensuring the operating temperature of the battery cell, and reducing the risk of thermal runaway. At the same time, the shape of the splint enables it to provide sufficient contact pressure for the battery cell, thereby ensuring the stability of the battery cell installation.

[0016] Preferably, the side wall of the positioning sleeve is provided with a plurality of through grooves, and the through grooves are located between every two slide grooves.

[0017] Through the above solution, the communication space between the inside and the outside of the positioning sleeve is increased by the through groove, and the exposed surface area of ​​the side wall of the battery cell is increased, thereby ensuring the heat dissipation effect.

[0018] Preferably, the guide assembly includes fins, a plurality of the fins are connected to a clamping plate, and the fins are made of metal with high thermal conductivity.

[0019] Through the above scheme, the heat dissipation area is increased by fins, and the material of the fins is the same as that of the splint, both of which are metal materials with high thermal conductivity, so that they can absorb the heat of the splint well, and the fins are located in the flow path of the cooling airflow, so that they can dissipate the surface heat in time and ensure its heat dissipation effect.

[0020] Preferably, ends of the fins away from the clamping plate are provided with inclined surfaces, and ends of the fins between adjacent battery cells cooperate with each other.

[0021] Through the above scheme, after the battery cell is inserted, the adjacent multiple groups of fins will abut against each other, and thus separate the air duct for the cooling airflow, dividing it into multiple channels with smaller cross-sectional areas, forming a "rectifier" effect, thereby avoiding the formation of turbulence, and making the cooling airflow form a more stable airflow between the battery cells, thereby ensuring the heat dissipation effect of the cooling airflow on the battery cells; and after the multiple fins abut against each other, the cross-sectional areas of the multiple channels after separation are reduced, thereby compressing the cross-sectional area of ​​the fluid flow path, thereby accelerating the fluid flow, and further improving the heat dissipation effect, ensuring the service life of the battery cell.

[0022] Preferably, the guide component further includes a filling layer, the filling layer is coated on the end of the fin, and the filling layer is made of a flexible material.

[0023] Through the above solution, hard contact between adjacent groups of fins is avoided, thereby reducing wear and improving service life. In addition, the flexible material can make it fit more closely, so that there is no gap at the abutment position between the fins, thereby making the gas flow more stable.

[0024] Preferably, the upper shell is provided with a plurality of air passages, and air port 1 and air port 2 are respectively provided at both ends of the air passages, air port 1 is located at the upper air outlet, and the opening of air port 1 is tilted downward, and air port 2 is located at the upper mounting groove, and the direction of air port 2 is horizontal.

[0025] In densely arranged cylindrical cells, due to their cylindrical shape and the characteristics of gas flow, triangular areas will be formed at the top or bottom of the cells. These areas are called "triangular blind areas", such as Figure 7 As shown, since the heat dissipation channels in these areas are limited and the cooling airflow is difficult to reach, local overheating is easily caused. Through the above scheme, the direction of the air port two can conveniently guide the airflow in the area where the triangular blind area is located into the air duct, while the direction of the air port one can conveniently guide the airflow to the air duct between the upper air port and the lower air port, thereby accelerating the gas flow in the area where the triangular blind area is located, avoiding local overheating in the area where the triangular blind area is located, thereby ensuring the heat dissipation effect of the battery cell and improving the service life of the battery cell.

[0026] Preferably, the positioning sleeve is provided with a plurality of through holes, the opening positions of the through holes correspond to the fins, and a plurality of plugs are provided under the upper shell, and the ends of the plugs are made of rubber material.

[0027] With the above solution, after the battery cell is installed, an upper shell needs to be placed on top of the battery cell. At this time, the plug under the upper shell will pass through the through hole and rest against the surface of the fin, and the rubber material at its end will increase the friction between it and the fin, thereby ensuring the stability of the fin position.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A large cylindrical sodium ion battery energy storage device of the present invention transfers the heat generated by the battery to the guide assembly by arranging a clamping assembly and a guide assembly, thereby increasing the heat dissipation area and improving the heat dissipation effect; and the guide assembly is used to more finely separate the air duct through which the cooling airflow flows, so that it forms a "rectifier" effect, thereby avoiding the cooling airflow from forming turbulence between densely arranged battery cells and affecting the heat dissipation effect, thereby ensuring the heat dissipation effect of the cooling airflow on the battery cell, thereby avoiding the service life and performance of materials such as polyanions being affected by local overheating, thereby ensuring the service life of the battery cell.

[0030] 2. A large cylindrical sodium-ion battery energy storage device of the present invention is provided with a clamping plate and a fin. The clamping plate can provide sufficient clamping force for the battery cell under the action of a compression spring. At the same time, the shape of the clamping plate enables it to be close to the battery cell and provide it with sufficient contact pressure, thereby ensuring the stability of the battery cell installation; in addition, the clamping plate and the fins are both made of metal with high thermal conductivity, so that they can conduct the heat on the surface of the battery cell in time, because they greatly increase the heat dissipation area, thereby improving the heat dissipation effect of the battery cell; at the same time, adjacent groups of fins abut against each other and separate the air ducts where the cooling airflow flows, so that it forms an effect similar to a "rectifier", avoiding the formation of turbulence, thereby ensuring the heat dissipation effect of the cooling airflow on the battery cell, thereby ensuring the service life of the battery cell.

[0031] 3. A large cylindrical sodium-ion battery energy storage device of the present invention can protect the ends of the fins by setting a filling layer, avoid hard contact between adjacent groups of fins, reduce the wear of the fins, and thus ensure the service life of the fins; on the other hand, because the filling layer is made of flexible material, when adjacent groups of fins abut, the filling layers will fit more closely, thereby avoiding gaps in the gas flow channel formed by the separation of multiple groups of fins, thereby ensuring the stability of the cooling gas flow.

[0032] 4. The large cylindrical sodium-ion battery energy storage device of the present invention is easily subject to bumps during transportation, which may cause the internal parts to loosen. In the process of charging and discharging the battery, the battery generates heat and undergoes thermal expansion and contraction, which may easily cause the internal parts to shift slightly, thereby generating vibrations and affecting the normal use of the battery. The present solution provides a clamping assembly and a filling layer, and uses a clamping plate and a compression spring to provide a clamping force for the battery. It also uses the retractability and elasticity of the spring to compensate for possible displacement of the battery during use. In addition, the setting of the flexible material of the compression spring and the filling layer can provide a certain buffering capacity for the battery, thereby improving the safety of the battery and ensuring the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the box body of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure inside the box of the present invention;

[0035] Figure 3 It is a structural schematic diagram of the arrangement and installation position of the battery cells of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the positional relationship between the clamping assembly of the present invention and the battery core and the positioning sleeve;

[0037] Figure 5 It is a structural schematic diagram of the positioning sleeve of the present invention;

[0038] Figure 6 It is a schematic diagram of the overall structure of the clamping assembly and the flow guide assembly of the present invention;

[0039] Figure 7 This is a structural diagram of the area where the triangular blind area of ​​this aspect is located;

[0040] Figure 8 This is a state diagram of the cooling gas of the present invention blowing toward the triangular blind area through the air duct;

[0041] Fig. 9 It is a schematic diagram of the structure of the through hole and the plug of the present invention.

[0042] In the figure: 1. housing; 2. battery cell; 3. air cooling mechanism; 4. upper shell; 401. upper mounting groove; 402. upper air outlet; 5. lower shell; 501. lower mounting groove; 502. lower air outlet; 6. positioning sleeve; 601. slide groove; 602. through groove; 7. clamping assembly; 701. clamping plate; 702. limiting rod; 703. compression spring; 8. guide assembly; 801. fin; 802. filling layer; 9. air duct; 10. air port one; 11. air port two; 12. through hole; 13. plug. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figures 1 to 9 The present invention provides a large cylindrical sodium ion battery type energy storage device, and the technical solution is as follows:

[0045] For details, please refer to Figure 1 , Figure 2 and Figure 3 A large cylindrical sodium ion battery cell energy storage device comprises a box body 1, a battery cell 2 and an air cooling mechanism 3, wherein the surface of the box body 1 is provided with a socket for connecting a charging or discharging connector, and the side of the box body 1 is also provided with a slot for the air cooling mechanism 3 to draw air, and a filter screen for filtering impurities in the air is provided in the slot, the battery cell 2 is cylindrical and made of a polyanion material, the air cooling mechanism 3 is an exhaust type, and further comprises an upper shell 4, a lower shell 5, a positioning sleeve 6, a clamping assembly 7 and a flow guide assembly 8, the upper shell 4 and the lower shell 5 are both arranged in the box body 1, a plurality of upper mounting grooves 401 are provided on the upper shell 4, and a plurality of lower mounting grooves 501 are provided on the lower shell 5, and the upper mounting grooves 401 and the lower mounting grooves 501 are both circular in shape as a whole, and can be installed and fixed in conjunction with the cylindrical battery cell 2;

[0046] An upper air port 402 is provided between every four of the upper mounting grooves 401, and a lower air port 502 is provided between every four of the lower mounting grooves 501. The hot air flow generated by the battery cell 2 will move upward, that is, flow out from the upper air port 402, but its natural flow speed is slow, so it is easy to cause local heat rise. In this scheme, the air cooling mechanism 3 is arranged below the lower air port 502, and air is extracted below the lower air port 502, so that the air flow with lower external temperature is drawn in from the upper air port 402, and then flows through the air duct between multiple groups of battery cells 2, and finally discharged from the lower air port 502, so that the cooling air flow first cools down the area with higher temperature, thereby ensuring the uniformity of the surface temperature of the battery cell 2. While cooling down the battery cell 2, it can also accelerate the outflow of the hot air flow between the battery cells 2. The upper side edge of the upper air port 402 is provided with an arc chamfer, which can make the air flow smoother, and a wind duct for the cooling air flow is formed between the lower air port 502 and the upper air port 402;

[0047] The positioning sleeve 6 is arranged between the upper shell 4 and the lower shell 5, and the two ends of the positioning sleeve 6 are respectively connected to the upper installation groove 401 and the lower installation groove 501. The plurality of battery cells 2 are arranged between the upper shell 4 and the lower shell 5. When installing the battery cells 2, the battery cells 2 can be fixed by simply inserting them into the positioning sleeve 6. The plurality of clamping components 7 are connected to the positioning sleeve 6, and the flow guide component 8 is connected to the clamping component 7. After the battery cells 2 are inserted into the positioning sleeve 6, the clamping component 7 will provide a certain degree of clamping force to the battery cells 2, thereby improving the stability of the installation of the battery cells 2. On the other hand, the clamping component 7 can transfer the heat generated by the battery cells 2 to the flow guide component 8, and The heat dissipation area is increased by the guide component 8 to improve the heat dissipation effect; the multiple clamping components 7 move in the direction away from the central axis of the positioning sleeve 6, and drive the guide component 8 to move to the air duct formed between the upper air outlet 402 and the lower air outlet 502, so that the cooling wind directly acts on the surface of the guide component 8 to improve the heat dissipation effect, and the adjacent guide components 8 abut against each other to divide the air duct into multiple channels, forming an effect similar to a "rectifier" to avoid the formation of turbulence, which not only ensures the heat dissipation effect, but also can compress the cross-sectional area of ​​the fluid flow path, thereby accelerating the fluid flow, thereby improving the heat dissipation effect and ensuring the service life of the battery cell 2.

[0048] As an embodiment of the present invention, refer to Figure 4 , Figure 5 and Figure 6 The side wall of the positioning sleeve 6 is provided with a plurality of through grooves 602, which are in a rounded rectangular shape. The through grooves 602 are located between every two slide grooves 601, and are used to increase the communication space between the inside and the outside of the positioning sleeve 6, increase the exposed surface area of ​​the side wall of the battery core 2, and thus ensure its heat dissipation effect; the side wall of the positioning sleeve 6 is provided with a plurality of slide grooves 601, and the clamping assembly 7 is connected to the slide groove 601;

[0049] The clamping assembly 7 includes a clamping plate 701, a limiting rod 702 and a compression spring 703. The limiting rod 702 is connected to the positioning sleeve 6, and the clamping plate 701 is connected to the limiting rod 702. The clamping plate 701 is an arc plate. This shape can well adapt to the arc surface of the side of the battery core 2, thereby maximizing the contact area, improving the heat dissipation effect, ensuring the operating temperature of the battery core 2, and reducing the risk of thermal runaway. The clamping plate 701 is made of aluminum plate. Due to its high thermal conductivity, it can quickly transfer the heat generated by the battery core 2 and has the characteristics of easy processing. At the same time, the clamping plate 701 is The shape enables it to provide sufficient contact pressure for the battery cell 2, thereby ensuring the stability of the installation of the battery cell 2; the compression spring 703 is sleeved on the limit rod 702, and its two ends are respectively connected to the clamping plate 701 and the positioning sleeve 6, and the upper end of the clamping plate 701 is provided with an inclined surface. During the process of inserting the battery cell 2 into the positioning sleeve 6, the battery cell 2 will push the clamping plate 701 to move through the inclined surface at the upper end of the clamping plate 701. At the same time, the clamping plate 701 provides a certain clamping force for the battery cell 2 under the action of the compression spring 703, thereby ensuring the stability of the installation of the battery cell 2 and improving the safety of the battery cell 2.

[0050] As an embodiment of the present invention, refer to Figure 6 The guide assembly 8 includes fins 801, and the heat dissipation area is increased by the fins 801. The material of the fins 801 is the same as that of the clamping plate 701, and both are made of aluminum plates, so that they can absorb the heat of the clamping plate 701 well, and the fins 801 are located in the flow path of the cooling airflow, so that they can dissipate the surface heat in time to ensure the heat dissipation effect. The multiple fins 801 are fixedly connected to the clamping plate 701, and the ends of the fins 801 away from the clamping plate 701 are all provided with inclined surfaces, and the inclined surfaces of the ends of the fins 801 between adjacent battery cells 2 can be mutually The fins 801 are adapted to fit together, that is, they can fit together, thereby separating the air duct where the cooling air flows, dividing it into multiple channels with smaller cross-sectional areas, forming a "rectifier" effect, thereby avoiding the formation of turbulence, and making the cooling air flow form a more stable airflow between the battery cells 2, thereby ensuring the heat dissipation effect of the cooling air flow on the battery cells 2; and after the multiple fins 801 abut, the cross-sectional areas of the multiple channels after separation are reduced, thereby compressing the cross-sectional area of ​​the fluid flow path, thereby accelerating the fluid flow, thereby improving the heat dissipation effect, and ensuring the service life of the battery cells 2;

[0051] The guide component 8 also includes a filling layer 802, which is wrapped around the end of the fin 801. The filling layer 802 is made of rubber and has a certain buffering capacity, which can avoid hard contact between adjacent groups of fins 801, thereby reducing wear. In addition, the flexible material can make it fit more closely, so that there is no gap at the abutment position between the fins 801, thereby making the gas flow more stable.

[0052] As an embodiment of the present invention, refer to Figure 8 and Fig. 9 The upper shell 4 is provided with a plurality of air passages 9, and an air port 10 and an air port 2 11 are respectively provided at both ends of the air passage 9, and the air passage 9, the air port 1 10 and the air port 2 11 are all square, the air port 1 10 is located at the upper air port 402, and the opening direction of the air port 1 10 is tilted downward, the air port 2 11 is located at the upper mounting groove 401, and the direction of the air port 2 11 is horizontal, so the direction of the air port 2 11 can conveniently guide the airflow in the area where the triangular blind area is located into the air passage 9, and the direction of the air port 1 10 can conveniently guide the airflow to the air passage between the upper air port 402 and the lower air port 502, thereby accelerating the gas flow in the area where the triangular blind area is located, thereby avoiding local overheating in the area where the triangular blind area is located, thereby ensuring the heat dissipation effect of the battery cell 2 and improving the service life of the battery cell 2.

[0053] As an embodiment of the present invention, refer to Fig. 9 The positioning sleeve 6 is provided with a plurality of through holes 12, and the positions and numbers of the through holes 12 correspond to the fins 801. A plurality of plugs 13 are provided under the upper shell 4, and the ends of the plugs 13 are made of rubber. When the upper shell 4 is covered, the plugs 13 will be inserted into the through holes 12 and contact the fins 801 through the rubber at their ends, thereby increasing the friction force to ensure the stability of the position of the fins 801.

[0054] The specific working principle is as follows: during the installation of the battery cell 2, the battery cell 2 first needs to be inserted into the positioning sleeve 6. During this process, the battery cell 2 will squeeze the clamping component 7, causing it to drive the guide component 8 to move, and the guide component 8 is directly exposed to the air duct where the cooling airflow flows, so that the cooling airflow directly acts on the surface of the guide component 8, thereby improving its heat dissipation effect;

[0055] Specifically, in the process of inserting the battery cell 2 into the positioning sleeve 6, the battery cell 2 will first contact the inclined surface at the upper end of the clamp 701. In the process of inserting the battery cell 2 downward, the clamp 701 will be pushed outward by the above-mentioned inclined surface. At the same time, under the action of the compression spring 703, the clamp 701 will provide a certain degree of clamping force to the battery cell 2, thereby ensuring the stability of the installation of the battery cell 2; in the process of the clamp 701 moving outward, the fin 801 will be driven to move into the air duct where the cooling airflow flows; when the battery cell 2 is connected and charged and discharged, the battery cell 2 will continue to generate heat, and this heat will be absorbed by the clamp 701 and transferred to the fin 801 which also has a high thermal conductivity. At this time, the fin 801 is in the flow path of the cooling airflow, so it can directly contact the cooling airflow, accelerate the heat dissipation rate, and thus improve its heat dissipation effect.

[0056] When the adjacent groups of guide components 8 move into the air duct where the cooling gas flows, they will form an abutment relationship with each other, and divide the air duct where the cooling gas flows into multiple channels with smaller cross-sectional areas, forming a "rectifier"-like effect, thereby preventing the cooling gas from forming turbulence during the flow process between the battery cells 2, thereby ensuring the flow stability of the cooling gas and the cooling and heat dissipation effect on the battery cells 2;

[0057] Specifically, when the clamp 701 pushes the fin 801 to move, adjacent groups of fins 801 will approach each other, and since the ends of the fins 801 are provided with inclined surfaces that can cooperate with each other, when the fins 801 approach and abut, the air duct for the flow of cooling gas will be divided into multiple channels with smaller cross-sectional areas, thereby avoiding the formation of turbulence; in addition, the ends of the fins 801 are also coated with a filling layer 802, which can avoid hard contact between adjacent groups of fins 801, thereby reducing the wear of the fins 801 and increasing their service life. On the other hand, the filling layer 802 can also fill the small gaps that are easily present in the abutting positions between the fins 801, thereby making the flow of cooling gas more stable and ensuring its heat dissipation effect on the battery cell 2.

[0058] In order to prevent the triangular blind spot from affecting the heat dissipation effect of the battery cell 2, an air duct 9, an air port 1 10 and an air port 2 11 are further provided. When the air cooling mechanism 3 draws air with a lower outside temperature from top to bottom, the direction of the air port 2 11 can conveniently guide the airflow in the area where the triangular blind spot is located into the air duct 9, while the direction of the air port 1 10 can conveniently guide the airflow to the air duct between the upper air port 402 and the lower air port 502, thereby accelerating the gas flow in the area where the triangular blind spot is located, cooling the area and avoiding local overheating, thereby ensuring the heat dissipation effect of the battery cell 2 and improving the service life of the battery cell 2.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large cylindrical sodium ion battery cell energy storage device, comprising a housing (1), a battery cell (2) and an air cooling mechanism (3), characterized in that: The invention also comprises an upper shell (4), a lower shell (5), a positioning sleeve (6), a clamping assembly (7) and a flow guide assembly (8); the upper shell (4) and the lower shell (5) are both arranged in the box body (1); a plurality of upper mounting grooves (401) are provided on the upper shell (4); a plurality of lower mounting grooves (501) are provided on the lower shell (5); an upper air port (402) is provided between every four of the upper mounting grooves (401); a lower air port (502) is provided between every four of the lower mounting grooves (501); an air duct for cooling air flow is formed between the lower air port (502) and the upper air port (402); and a plurality of the battery cells (2) are arranged The positioning sleeve (6) is arranged between the upper shell (4) and the lower shell (5), a plurality of the clamping assemblies (7) are connected to the positioning sleeve (6), the flow guide assembly (8) is connected to the clamping assembly (7), the battery cell (2) is inserted into the positioning sleeve (6) and clamped by the clamping assembly (7), the plurality of the clamping assemblies (7) move in a direction away from the central axis of the positioning sleeve (6), and drive the flow guide assembly (8) to move into the air duct formed between the upper air outlet (402) and the lower air outlet (502), and adjacent flow guide assemblies (8) abut against each other to divide the air duct into a plurality of channels.

2. A large cylindrical sodium ion battery energy storage device according to claim 1, characterized in that: The lower air port (502) is located above the air cooling mechanism (3), and the upper edge of the upper air port (402) is provided with an arc chamfer.

3. A large cylindrical sodium ion battery energy storage device according to claim 1, characterized in that: The side wall of the positioning sleeve (6) is provided with a plurality of slide grooves (601), the clamping assembly (7) is connected to the slide grooves (601), the clamping assembly (7) comprises a clamping plate (701), a limiting rod (702) and a compression spring (703), the limiting rod (702) is connected to the positioning sleeve (6), the clamping plate (701) is connected to the limiting rod (702), the compression spring (703) is sleeved on the limiting rod (702), and its two ends are respectively connected to the clamping plate (701) and the positioning sleeve (6), and the upper end of the clamping plate (701) is provided with an inclined surface.

4. A large cylindrical sodium ion battery energy storage device according to claim 3, characterized in that: The clamping plate (701) is an arc plate, and the clamping plate (701) is made of a metal material with a high thermal conductivity.

5. A large cylindrical sodium ion battery energy storage device according to claim 3, characterized in that: The side wall of the positioning sleeve (6) is provided with a plurality of through grooves (602), and the through grooves (602) are located between every two slide grooves (601).

6. A large cylindrical sodium ion battery energy storage device according to claim 4, characterized in that: The flow guide component (8) comprises fins (801), a plurality of the fins (801) are connected to the clamping plate (701), and the fins (801) are made of a metal material with a high thermal conductivity.

7. A large cylindrical sodium ion battery energy storage device according to claim 6, characterized in that: The ends of the fins (801) away from the clamping plate (701) are all provided with inclined surfaces, and the ends of the fins (801) between adjacent battery cells (2) are matched with each other.

8. A large cylindrical sodium ion battery energy storage device according to claim 7, characterized in that: The flow guide component (8) further comprises a filling layer (802), wherein the filling layer (802) is coated on the end of the fin (801), and the filling layer (802) is made of a flexible material.

9. A large cylindrical sodium ion battery energy storage device according to claim 1, characterized in that: The upper shell (4) is provided with a plurality of air passages (9), and air port one (10) and air port two (11) are respectively provided at two ends of the air passage (9), the air port one (10) is located at the upper air outlet (402), and the opening of the air port one (10) is tilted downward, and the air port two (11) is located at the upper mounting groove (401), and the direction of the air port two (11) is horizontal.

10. A large cylindrical sodium ion battery energy storage device according to claim 6, characterized in that: The positioning sleeve (6) is provided with a plurality of through holes (12), the opening positions of the through holes (12) correspond to the fins (801), and a plurality of plugs (13) are provided below the upper shell (4), and the ends of the plugs (13) are made of rubber material.

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