Full-carbon lithium ion capacitor energy storage device

Abstract

The utility model provides a full-carbon lithium ion capacitor energy storage device, which comprises a box body, a capacitor module arranged in the box body and an upper cover arranged above the box body, and one end of the box body is provided with a front panel; a first air inlet cavity exists between the lower portion of the capacitor module and the inner wall of the box body, second air inlet cavities exist between the left side and the right side of the capacitor module and the inner wall of the box body, and air inlets are formed in the positions, corresponding to the first air inlet cavity and the second air inlet cavities, of the box body. An air outlet cover is arranged at the position, corresponding to the capacitor module, of the upper cover, an air outlet cavity is formed between one end, extending into the box body, of the air outlet cover and the capacitor module, and an air outlet hole communicated with the air outlet cavity is formed in the other end of the air outlet cover. The full-carbon lithium ion capacitor energy storage device has the advantages of high operation stability and reliability, can effectively recover regenerative braking energy of port hoisting machinery, and ensures stable operation of the device through efficient heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the field of capacitor energy storage technology, and in particular relates to an all-carbon lithium-ion capacitor energy storage device. Background Technology

[0002] Typically, the capacitance and voltage of a single lithium-ion capacitor cannot meet practical requirements. Therefore, these individual capacitors need to be connected in series and parallel to form a module for use. The rationality of the module structure design directly affects the performance of the module. In terms of thermal balance, during high-power charging and discharging, each lithium-ion capacitor generates a large amount of heat, so effective heat dissipation is required to ensure the performance of the individual capacitors.

[0003] In port cranes, the lifting and lowering mechanisms consume a large amount of energy, and regenerative braking energy accounts for a significant proportion. Traditional energy handling methods suffer from high energy consumption and pollution. While all-carbon lithium-ion capacitors, as a novel energy storage device, offer advantages such as high power density, high energy density, high safety, long lifespan, and wide temperature range, existing all-carbon lithium-ion capacitors still suffer from poor heat dissipation efficiency, which is detrimental to the stable and reliable operation of energy storage systems. Therefore, developing an all-carbon lithium-ion capacitor energy storage system that can effectively recover regenerative braking energy and efficiently dissipate heat is of great significance. Utility Model Content

[0004] In view of this, the present invention aims to propose an all-carbon lithium-ion capacitor energy storage device to solve the problem of poor heat dissipation efficiency of existing all-carbon lithium-ion capacitors in application.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A carbon-type lithium-ion capacitor energy storage device includes a housing, a capacitor module disposed inside the housing, and a top cover disposed on the top of the housing. One end of the housing is provided with a front panel, and the front panel is provided with wiring terminals and a controller for connecting the capacitor module.

[0007] There is a first air inlet cavity between the bottom of the capacitor module and the inner wall of the box, and there are second air inlets between the left and right sides of the capacitor module and the inner wall of the box. Air inlets are provided on the box at positions corresponding to the first and second air inlets. The capacitor module includes multiple individual support frames, and a capacitor cell with a tab is provided between two adjacent individual support frames. There is a heat dissipation cavity between the individual support frame and the capacitor cell. The first and second air inlets are both connected to the heat dissipation cavity.

[0008] The top cover is provided with an air hood corresponding to the position of the capacitor module. One end of the air hood extends into the housing and there is an air vent between it and the capacitor module. The other end is provided with an air vent that communicates with the air vent. A fan is provided on the top cover corresponding to the position of the air vent.

[0009] Furthermore, the single support frame is provided with multiple air inlet diversion ports at the positions corresponding to the first air inlet cavity and the second air inlet cavity, and the single support frame is provided with an air outlet confluence port at the position corresponding to the air outlet cavity. Both the air inlet diversion ports and the air outlet confluence port are connected to the heat dissipation cavity.

[0010] Furthermore, the unit support frame is provided with a busbar for connecting the capacitor unit tabs at the position corresponding to the second air inlet cavity, and the terminal block is connected to the busbar.

[0011] Furthermore, the individual support frames are detachably connected.

[0012] Furthermore, the individual support frames are connected by snap-fit ​​components, and each individual support frame has at least four interlocking connectors around its perimeter.

[0013] Furthermore, the capacitor module is provided with end plates at both the front and rear ends, and the end plates are detachably mounted on the housing. The individual support frame is detachably connected to the end plates.

[0014] Furthermore, the air outlet cover is a horn-shaped structure, with the large-diameter end of the air outlet cover facing the capacitor module.

[0015] Furthermore, the front panel is detachably mounted on the housing.

[0016] Furthermore, the front panel is equipped with a folding handle.

[0017] Furthermore, the top cover is detachably mounted on the housing.

[0018] Compared with existing technologies, the all-carbon lithium-ion capacitor energy storage device of this utility model has the following advantages:

[0019] (1) The all-carbon lithium-ion capacitor energy storage device described in this utility model has the advantages of high operational stability and reliability, can effectively recover the regenerative braking energy of port crane machinery, and ensures the stable operation of the device through efficient heat dissipation.

[0020] (2) The all-carbon lithium-ion capacitor energy storage device described in this utility model can achieve efficient heat dissipation of the capacitor module by adopting a cooling method of simultaneous bottom and side air intake. At the same time, by setting a single unit support frame between two adjacent capacitor units, not only can the capacitor units be accommodated and supported, but also the capacitor units can be electrically isolated, which is beneficial to improving the safety and reliability of the capacitor units during operation.

[0021] (3) The all-carbon lithium-ion capacitor energy storage device described in this utility model can also ensure the heat dissipation effect of each capacitor cell in the capacitor module by utilizing the heat dissipation cavity formed between the single cell support frame and the capacitor cell, which is conducive to improving the service life of the capacitor cell and further improving the overall stability and reliability of the device. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0023] Figure 1 This is an exploded view of an all-carbon lithium-ion capacitor energy storage device according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded view of the capacitor module in an all-carbon lithium-ion capacitor energy storage device according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the internal structure of an all-carbon lithium-ion capacitor energy storage device according to an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 for Figure 3 A magnified view of a section at point B in the middle;

[0028] Figure 6 This is a cross-sectional view of an all-carbon lithium-ion capacitor energy storage device according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Housing; 2. Capacitor module; 3. Top cover; 4. Front panel; 5. Terminal block; 6. Controller; 7. Busbar; 8. End plate; 9. Fan; 10. Folding handle; 11. Individual support frame; 12. Capacitor cell; 13. Electrode; 14. Plug-in part; 15. Fastener; 16. Air inlet; 17. Air outlet cover; 18. Air outlet cavity; 19. First air inlet cavity; 20. Crossbeam; 21. Heat dissipation cavity; 22. Air inlet branch outlet; 23. Air outlet confluence outlet; 24. Second air inlet cavity. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] A type of all-carbon lithium-ion capacitor energy storage device, such as Figures 1 to 6As shown, the device includes a housing 1, a capacitor module 2 housed within the housing 1, and a top cover 3 on top of the housing 1. One end of the housing 1 has a front panel 4, which has terminals 5 and a controller 6 for connecting the capacitor module 2. Specifically, both terminals 5 and the controller 6 can be devices used in existing capacitor energy storage devices. Both terminals 5 and the controller 6 can be installed on the front panel 4 using conventional methods. Connecting the capacitor module 2 to external devices using terminals 5 and controlling the capacitor module 2 using the controller 6 are existing technologies in this field, and this invention does not involve improvements to the structure of terminals 5 and the controller 6; therefore, they will not be described further here.

[0036] The main innovation of this utility model lies in the structural design of the device. Specifically, there is a first air inlet cavity 19 between the lower part of the capacitor module 2 and the inner wall of the housing 1, and there are second air inlets 24 between the left and right sides of the capacitor module 2 and the inner wall of the housing 1. Air inlets 16 are provided on the housing 1 at positions corresponding to the first air inlet cavity 19 and the second air inlet cavity 24. The capacitor module 2 includes multiple individual support frames 11, and a capacitor cell 12 with a tab 13 is provided between two adjacent individual support frames 11. There is a heat dissipation cavity 21 between the individual support frame 11 and the capacitor cell 12. The first air inlet cavity 19 and the second air inlet cavity 24 are both connected to the heat dissipation cavity 21.

[0037] For example, the bottom and lower side walls of the housing 1 are provided with several air inlets 16. By adopting a cooling method of simultaneous air intake from the bottom and sides, efficient heat dissipation of the capacitor module 2 can be achieved. Meanwhile, the individual support frame 11 can be made of existing materials such as PP, which have insulating and flame-retardant properties. By setting the individual support frame 11 between two adjacent capacitor cells 12, not only can the capacitor cells 12 be accommodated and supported, but electrical isolation of the capacitor cells 12 can also be achieved, which is beneficial to improving the safety and reliability of the capacitor cells 12 during operation. Furthermore, by utilizing the heat dissipation cavity 21 formed between the individual support frame 11 and the capacitor cells 12, the heat dissipation effect of each capacitor cell 12 in the capacitor module 2 can be ensured, which is beneficial to improving the service life of the capacitor cells 12 and further improving the overall operational stability and reliability of the capacitor module 2.

[0038] In practical applications, the capacitor cell 12 is an all-carbon lithium-ion capacitor cell with a soft-pack structure. The tabs 13 extend along the length of the electrode surface. The tabs 13 can be connected in parallel and then in series to form a group by welding or bolting. In addition, multiple cell support frames 11 can be stacked along the length of the housing 1, and each cell support frame 11 is a rectangular frame structure. There are receiving grooves on the left and right sides of the cell support frame 11 that can cooperate with the inner wall of the housing 1 to form a second air inlet cavity 24. One or more capacitor cells 12 can be embedded between two adjacent cell support frames 11. Those skilled in the art can adjust the number of cell support frames 11 and capacitor cells 12 according to actual needs, which will not be elaborated here.

[0039] The main innovation of this utility model lies in the structural design of the device. Specifically, an air outlet hood 17 is provided on the upper cover 3 at the position corresponding to the capacitor module 2. An air outlet cavity 18 exists between one end of the air outlet hood 17 extending into the box 1 and the capacitor module 2, and an air outlet hole communicating with the air outlet cavity 18 is provided on the other end. A fan 9 is provided on the upper cover 3 at the position corresponding to the air outlet hole.

[0040] For example, both the exhaust shroud 17 and the fan 9 can be mounted on the top cover 3 using conventional methods such as screws. Multiple sets of exhaust shrouds 17 and fans 9 can be spaced apart on the top cover 3. By setting the exhaust shroud 17 on the top cover 3, the exhaust shroud 17 can effectively gather the hot airflow entering the exhaust cavity 18 through the heat dissipation cavity 21, ensuring that the hot airflow can be quickly discharged from the housing 1 under the action of the fan 9, thereby achieving efficient heat dissipation of the capacitor module 2.

[0041] In practical applications, when fan 9 starts, cooling air enters through the air inlets 16 at the bottom and sides of the housing 1, flowing into the first air inlet 19 and the second air inlet 24 respectively. Then, it flows from the bottom and sides of the capacitor module 2 into the heat dissipation cavity 21 for heat exchange, and finally flows into the exhaust cavity 18, where it is discharged from the housing 1 by fan 9 under the converging effect of the exhaust shroud 17. This airflow design is reasonable and can effectively improve the heat dissipation efficiency of the capacitor module 2.

[0042] Preferably, the single support frame 11 is provided with multiple air inlet diverters 22 at the positions corresponding to the first air inlet cavity 19 and the second air inlet cavity 24, and the single support frame 11 is provided with an air outlet confluencer 23 at the position corresponding to the air outlet cavity 18. The air inlet diverters 22 and the air outlet confluencer 23 are both connected to the heat dissipation cavity 21.

[0043] In practical applications, by setting multiple air inlets 22, the cooling air can be effectively dispersed, ensuring that the cooling air flows evenly to all parts of the heat dissipation cavity 21. This allows the cooling air to make uniform contact with the surface of the capacitor cell 12, ensuring the heat dissipation effect of the capacitor cell 12. At the same time, by setting an air outlet 23 at the position of the air outlet cavity 18, the heated airflow can be better converged to the air outlet shroud 17 and finally quickly discharged from the housing 1.

[0044] Preferably, a busbar 7 for connecting the tabs 13 of the capacitor cell 12 is provided on the individual support frame 11 at the position corresponding to the second air inlet cavity 24, and the terminal block 5 is connected to the busbar 7. Exemplarily, the busbar 7 can be fixed to the individual support frame 11 by conventional methods such as adhesive. The tabs 13 of the capacitor cell 12 can be folded and welded to the busbar 7 to achieve electrical connection. Alternatively, the busbar 7 and the terminal block 5 can be connected by conventional methods such as busbars or wires. Those skilled in the art can configure this according to actual needs, and it will not be elaborated further here.

[0045] In practical applications, fixing the busbar 7, which connects the tabs 13 of the capacitor cells 12, to the individual support frame 11 facilitates the overall assembly of the capacitor module 2. Simultaneously, by aligning the busbar 7 with the second air inlet 24, the cooling air entering through the second air inlet 24 can directly exchange heat with the busbar 7, thereby achieving direct cooling of the busbar 7 and ensuring its stability and reliability during capacitor operation.

[0046] Preferably, the individual support frames 11 are detachably connected. For example, the individual support frames 11 are connected by snap-fit ​​members 15, and each individual support frame 11 has at least four interlocking insertion portions 14 around its perimeter. Multiple snap-fit ​​members 15 can be provided corresponding to the center of each individual support frame 11. Each snap-fit ​​member 15 can be a plastic snap-fit ​​and fixed to the individual support frame 11. A stable connection between adjacent individual support frames 11 can be achieved by the snap-fit ​​members 15 engaging with each other.

[0047] In practical applications, the single support frame 11 is a rectangular frame structure. The four corners of the single support frame 11 are provided with four plug-in parts 14. The plug-in parts 14 are provided with grooves and protrusions that can cooperate with each other, so that the plug-in parts 14 between two adjacent single support frames 11 can be plugged in. Those skilled in the art can also choose other plug-in part 14 structures according to actual needs, which will not be described in detail here.

[0048] By providing a plug-in part 14 and a fastener 15 on the individual support frame 11, not only can the individual support frames 11 be detachably connected, but it also helps to improve the structural strength and stability of the individual support frames 11 after connection.

[0049] Preferably, the capacitor module 2 has end plates 8 at both its front and rear ends. The end plates 8 are detachably mounted on the housing 1, and the individual support frame 11 is detachably connected to the end plates 8. Exemplarily, a connector that mates with the plug-in portion 14 can also be fixed to the end plate 8. The connectors and plug-in portions 14 are arranged in a one-to-one correspondence. By using the connectors to engage with the plug-in portions 14, a detachable connection between the individual support frame 11 and the end plates 8 can be achieved. Furthermore, those skilled in the art can also use other methods to achieve a detachable connection between the individual support frame 11 and the end plates 8, which will not be elaborated here.

[0050] In practical applications, the housing 1 is equipped with crossbeams 20 for mounting end plates 8 and supporting capacitor modules 2. Multiple crossbeams 20 can be spaced out. The end plates 8 can be fixed to the crossbeams 20 using conventional methods such as screws, enabling a detachable connection between the end plates 8 and the housing 1. The crossbeams 20 also create a first air inlet cavity 19 between the capacitor modules 2 and the inner wall of the housing 1. Furthermore, both the crossbeams 20 and the housing 1 can be made of thermally conductive materials such as steel, allowing for heat conduction and dissipation through direct contact with the capacitor modules 2.

[0051] Preferably, the air outlet shroud 17 is a trumpet-shaped structure, with its large-diameter end facing the capacitor module 2. By adopting a trumpet-shaped air outlet shroud 17, the hot airflow can be better concentrated.

[0052] Preferably, the front panel 4 is detachably mounted on the housing 1. Exemplarily, the front panel 4 can be mounted on the housing 1 by conventional means such as screws.

[0053] In practical applications, a folding handle 10 is provided on the front panel 4. For example, the folding handle 10 can also be installed on the front panel 4 by conventional means such as screws. By providing the folding handle 10, it is convenient for operators to assemble the front panel 4 during maintenance.

[0054] Preferably, the top cover 3 is detachably mounted on the housing 1. Exemplarily, the top cover 3 can be mounted on the housing 1 by conventional means such as screws. By adopting a detachable mounting method for the front panel 4 and the top cover 3, not only is the assembly of this device easier, but also its subsequent use and maintenance are also easier.

[0055] This utility model discloses an all-carbon lithium-ion capacitor energy storage device, which boasts high operational stability and reliability. It effectively recovers regenerative braking energy from port cranes and ensures stable operation through efficient heat dissipation. By employing a cooling method with simultaneous bottom and side air intake, efficient heat dissipation of the capacitor module is achieved. Furthermore, by installing individual capacitor support frames between adjacent capacitor cells, not only are the individual capacitor cells accommodated and supported, but electrical isolation is also provided, enhancing the safety and reliability of the individual capacitor cells during operation. In addition, the heat dissipation cavity formed between the individual capacitor support frames and the individual capacitor cells ensures effective heat dissipation for each capacitor cell within the module, extending their lifespan and further improving the overall stability and reliability of the device.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A carbon-based lithium-ion capacitor energy storage device, comprising a housing (1), a capacitor module (2) disposed within the housing (1), and a top cover (3) disposed above the housing (1), wherein a front panel (4) is provided at one end of the housing (1), and the front panel (4) is provided with terminals (5) for connecting the capacitor module (2) and a controller (6), characterized in that: There is a first air inlet cavity (19) between the bottom of the capacitor module (2) and the inner wall of the box (1), and there are second air inlets (24) between the left and right sides of the capacitor module (2) and the inner wall of the box (1). Air inlets (16) are provided on the box (1) at positions corresponding to the first air inlet cavity (19) and the second air inlet cavity (24). The capacitor module (2) includes multiple single-unit support frames (11). A capacitor single unit (12) with a tab (13) is provided between two adjacent single-unit support frames (11). There is a heat dissipation cavity (21) between the single-unit support frame (11) and the capacitor single unit (12). The first air inlet cavity (19) and the second air inlet cavity (24) are both connected to the heat dissipation cavity (21). The upper cover (3) is provided with an air hood (17) at the position corresponding to the capacitor module (2). One end of the air hood (17) extends into the box (1) and there is an air outlet cavity (18) between it and the capacitor module (2). The other end is provided with an air outlet hole communicating with the air outlet cavity (18). The upper cover (3) is provided with a fan (9) at the position corresponding to the air outlet hole.

2. The all-carbon lithium-ion capacitor energy storage device according to claim 1, characterized in that: The single support frame (11) is provided with multiple air inlet diverters (22) at the positions corresponding to the first air inlet cavity (19) and the second air inlet cavity (24), and the single support frame (11) is provided with an air outlet confluencer (23) at the position corresponding to the air outlet cavity (18). The air inlet diverters (22) and the air outlet confluencer (23) are both connected to the heat dissipation cavity (21).

3. The all-carbon lithium-ion capacitor energy storage device according to claim 1, characterized in that: The unit support frame (11) is provided with a busbar (7) for connecting the tabs (13) of the capacitor unit (12) at the position corresponding to the second air inlet cavity (24), and the terminal (5) is connected to the busbar (7).

4. A carbon-based lithium-ion capacitor energy storage device according to any one of claims 1-3, characterized in that: The individual support frames (11) are detachably connected.

5. The all-carbon lithium-ion capacitor energy storage device according to claim 4, characterized in that: The individual support frames (11) are connected by snap fasteners (15), and each individual support frame (11) has at least four interlocking parts (14) around its perimeter.

6. The all-carbon lithium-ion capacitor energy storage device according to claim 1, characterized in that: The capacitor module (2) is provided with end plates (8) at both the front and rear ends. The end plates (8) are detachably installed on the housing (1). The single unit support frame (11) is detachably connected to the end plates (8).

7. The all-carbon lithium-ion capacitor energy storage device according to claim 1, characterized in that: The air outlet cover (17) is a horn-shaped structure, with the large diameter end of the air outlet cover (17) facing the capacitor module (2).

8. The all-carbon lithium-ion capacitor energy storage device according to claim 1, characterized in that: The front panel (4) is detachably mounted on the housing (1).

9. A carbon-based lithium-ion capacitor energy storage device according to claim 1 or 8, characterized in that: The front panel (4) is provided with a folding handle (10).

10. The all-carbon lithium-ion capacitor energy storage device according to claim 1, characterized in that: The top cover (3) is detachably mounted on the housing (1).

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