A novel heat dissipation structure of super capacitor module

Abstract

The utility model discloses a novel super capacitor module's heat radiation structure relates to super capacitor structure technical field, solved the super capacitor monomer positive and negative pole staggered placement, and the monomer positive and negative pole orientation is not consistent and leads to the inconsistent use life, can not very good heat conduction export module metal shell outside, influence module service life's problem. Including cooling layer, the cooling layer upper portion is equipped with the heat conduction layer, and the heat conduction layer upper portion is equipped with a plurality of super capacitor monomers, and the super capacitor monomer is away from cooling layer one end and is equipped with the positive pole and the negative pole, and still be connected with the connecting piece between the super capacitor monomer, and the connecting piece one end is connected in the positive pole of super capacitor monomer, and the other end is connected in the negative pole of another super capacitor monomer. Its module welding mode is same end welding, and there is no welding structure in the bottom, and it is convenient to use the heat conduction layer filling to conduct the heat that monomer radiates in the bottom, and radiates heat through the cooling layer, reached the effect of improving the heat dissipation efficiency, prolonging module service life.

Description

Technical Field

[0001] This utility model relates to the field of supercapacitor structure technology, and in particular to a novel heat dissipation structure for a supercapacitor module. Background Technology

[0002] Supercapacitors are a new type of high-performance electrochemical energy storage device, also known as electrochemical capacitors or electric double-layer capacitors. Unlike traditional capacitors, they are similar to rechargeable batteries, with a maximum capacity that is hundreds of thousands to millions of times greater than that of traditional capacitors. They also have higher specific power and longer cycle life than traditional rechargeable batteries. Supercapacitors are a new energy product that has developed rapidly in the last two decades and are widely used in fields including automobiles, heavy transportation, wind power generation, photovoltaic power generation, backup energy, wireless communication, consumer electronics, and industrial electronics, providing energy storage and power transmission solutions for various industries.

[0003] like Figure 1 As shown, the current assembly and connection method of large cylindrical supercapacitor modules is to place the positive and negative terminals of the supercapacitor cells alternately. When connecting, the positive and negative terminals of two adjacent cells are connected by connecting pieces. When assembling the module, the positive and negative terminals are cross-welded, which makes assembly difficult. After assembly, each connecting piece connecting the cells needs to be connected to a voltage acquisition line. The double-sided welded module wiring is messy and prone to incorrect connection.

[0004] Furthermore, when the module is working, half of the cells have their positive terminals facing upwards, while the other half have their positive terminals facing downwards. The inconsistent orientation of the positive and negative terminals of the cells leads to inconsistent lifespans. At this time, the state of the diaphragm inside the cells absorbing the ionized electrolyte is inconsistent, resulting in inconsistent performance of the cells and a significant impact on the lifespan of the entire module.

[0005] Furthermore, the modules welded at both ends, and the modules connected in series, are installed in a sealed metal shell. Due to the structural limitations, their heat dissipation method is often limited to natural heat dissipation, which is inefficient. When the supercapacitor operates at its rated voltage, it cannot effectively conduct heat out of the module's metal shell, which also affects the module's lifespan. Utility Model Content

[0006] The purpose of this invention is to provide a novel heat dissipation structure for a supercapacitor module. The module is welded at the same end, with no welded structure at the bottom. This allows for the use of a thermally conductive layer at the bottom to conduct heat dissipated by individual cells, and heat dissipation through a cooling layer, thereby improving heat dissipation efficiency and extending the module's service life.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A novel heat dissipation structure for a supercapacitor module includes a cooling layer, a heat-conducting layer on top of the cooling layer, and several supercapacitor cells on top of the heat-conducting layer. Each supercapacitor cell has a positive and a negative electrode at the end furthest from the cooling layer. Connecting pieces are also connected between the supercapacitor cells, with one end of the connecting piece connected to the positive electrode of one supercapacitor cell and the other end connected to the negative electrode of another supercapacitor cell.

[0009] Furthermore, the thermally conductive layer is a thermally conductive silicone grease layer, and the supercapacitor cells are confined within the cured thermally conductive layer.

[0010] Furthermore, the cooling layer is in direct contact with the outer casing of the supercapacitor cell.

[0011] Furthermore, coolant flows through the cooling layer.

[0012] Furthermore, the cooling layer is a cooling plate or a cooling serpentine tube.

[0013] Furthermore, the connecting piece includes an elastic stress joint and connecting portions connecting both sides of the elastic stress joint.

[0014] Furthermore, the elastic stress joint is U-shaped, and the connecting part is connected to the corresponding end of the elastic stress joint.

[0015] Furthermore, the elastic stress joint includes a first horizontal section in the middle and second vertical sections on both sides, with the first horizontal section and the second vertical sections arranged perpendicularly to each other.

[0016] Furthermore, the supercapacitor cell also includes an insulating device located between its positive and negative electrodes.

[0017] Furthermore, the connecting piece is welded between two supercapacitor cells.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. In this utility model, the positive and negative electrodes are on the same end. When connecting the modules, one end of the connecting piece is welded to the positive electrode of the first unit, and the other end of the connecting piece is welded to the negative electrode of the second unit, thus gradually realizing the connection of the entire module. All units in the entire module have the negative electrode facing upward and the same orientation, which improves the performance consistency of the units when they are used and extends the service life of the module.

[0020] 2. The connecting pieces between individual units require a voltage acquisition line to be connected to the small hole in the middle of each connecting piece. Welding at the same end ensures that the positive and negative terminals of the unit are on the same side. The connecting pieces of the new module are on the same end, and the voltage acquisition lines are also uniformly on the upper surface of the module. The module assembly is simpler and more concise, which greatly improves the module production efficiency and avoids the quality risks of wiring errors. The voltage acquisition line layout is more reasonable and the wiring is simpler.

[0021] 3. The connecting pieces between individual modules abandon the traditional rigid connection method of direct connection. Instead, a stress relief device, the stress joint, is set in the middle, which has a certain degree of elasticity. When the individual modules are subjected to stress or external pressure, the stress joint can absorb part of the lateral force, preventing the negative electrode cover from leaking due to excessive external force, which could lead to module failure or accidents. Compared with the rigid connection of existing module connecting pieces, the new module is safer.

[0022] 4. Same-end welding eliminates the need for welding structures at the bottom. Thermal grease is used to conduct the heat dissipated by the individual units. Thermal grease is poured into the bottom of the individual units. After the silicone cures, it can fix the individual units at the bottom of the module to prevent movement. At the same time, thermal grease also has the functions of fixing the position of the individual units and resisting impact and vibration.

[0023] A cooling plate is laid on the surface of the thermal grease. The cooling plate is directly connected to the metal shell of the module. The thermal grease transfers the heat generated by the individual units during operation to the metal shell for large-area heat dissipation. At the same time, there is flowing coolant inside the cooling plate. The more efficient liquid cooling method can conduct heat from inside the module through the coolant and balance the temperature between the individual units, thus extending the module's service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a supercapacitor module in the prior art (reverse side);

[0025] Figure 2 This is a schematic diagram of the overall structure of a novel supercapacitor module heat dissipation structure in this embodiment;

[0026] Figure 3 This is a schematic diagram of the connection structure between two adjacent supercapacitor cells in the heat dissipation structure of a novel supercapacitor module in this embodiment.

[0027] In the diagram, 1 is the cooling layer; 2 is the heat-conducting layer; 3 is the supercapacitor cell; 31 is the positive electrode; 32 is the negative electrode; 33 is the insulation device; 4 is the connecting piece; 41 is the elastic stress joint; 42 is the connection part; and 43 is the voltage acquisition line hole. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation on this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0029] A novel heat dissipation structure for supercapacitor modules, such as Figure 2As shown, it includes a cooling layer 1, a heat-conducting layer 2 on the upper part of the cooling layer 1, and a plurality of supercapacitor cells 3 on the upper part of the heat-conducting layer 2. The end of the supercapacitor cell 3 away from the cooling layer 1 is provided with a positive electrode 31 and a negative electrode 32. The supercapacitor cells 3 are also connected by connecting pieces 4 (one of the supercapacitor cells 3 is connected to the total positive electrode and a connecting piece 4, one is connected to the total negative electrode and a connecting piece 4, and the rest are connected to two connecting pieces 4 to connect with two adjacent cells to complete the connection between cells). One end of the connecting piece 4 is connected to the positive electrode 31 of the supercapacitor cell 3, and the other end is connected to the negative electrode 32 of another supercapacitor cell 3.

[0030] In this embodiment, the positive electrode 31 is located at the top outer ring of the supercapacitor cell 3, and the negative electrode 32 is located at the center of the supercapacitor cell 3 and extends upwards by a certain distance, making it higher than the positive electrode 31. The supercapacitor cell 3 also includes an insulating device 33 located between its positive electrode 31 and negative electrode 32. The insulating device 33 is a ring made of insulating material, such as a rubber ring, which is fitted and fixed to the outer periphery of the bottom end of the negative electrode 32, insulating and separating the bottom of the negative electrode 32 from the positive electrode 31. As for how to arrange the positive electrode 31 and the negative electrode 32 at the same end of the supercapacitor cell 3, this is existing technology. The same-end welding method is used in the welding of lithium batteries and square battery modules, which will not be described in detail here.

[0031] like Figure 2 As shown, the thermally conductive layer 2 is a thermally conductive silicone grease layer, and the supercapacitor cell 3 is confined within the cured thermally conductive layer 2. To improve the cooling effect, in some embodiments, the cooling layer 1 directly contacts the outer shell of the supercapacitor cell 3. That is, after the supercapacitor cell 3 is completely placed on the cooling layer 1, thermally conductive silicone grease is poured into the bottom. After the thermally conductive silicone grease layer is cured, it has a certain impact and vibration resistance. (Alternatively, a layer can be poured first, then the supercapacitor cell 3 is placed, and finally another layer is poured to position the supercapacitor cell 3, so that the cooling layer 1 does not directly contact the outer shell of the supercapacitor cell 3. This method has better impact and vibration resistance.)

[0032] To improve the cooling effect, coolant is circulated in the cooling layer 1. The cooling layer 1 can be a cooling plate or a cooling serpentine tube or other cooling structure.

[0033] like Figure 3 As shown, the connecting piece 4 includes an elastic stress joint 41 and connecting portions 42 connecting both sides of the elastic stress joint 41; specifically, the elastic stress joint 41 is inverted U-shaped, and the connecting portions 42 are integrally connected to the lower part of the corresponding end of the elastic stress joint 41. The connecting piece 4 can be formed by bending.

[0034] In this embodiment, the elastic stress joint 41 includes a first horizontal part in the middle and two vertical parts arranged vertically downwards on both sides. The first horizontal part and the second vertical part are arranged perpendicularly to each other. A voltage acquisition line hole 43 is opened in the first horizontal part for voltage acquisition line connection. The connecting part 42 is connected to the lower end of the corresponding second vertical part, and positioning holes are opened in the connecting parts 42 on both sides of the connecting piece 4. The connecting parts 42 are positioned and welded between the two supercapacitor cells 3 through the positioning holes (the positioning holes can play a positioning role and firmly fix the terminals of the supercapacitor cells 3, reduce the tensile force at the weld and enhance the welding reliability). The positioning holes of the connecting part 42 are welded to the outer periphery of the positive electrode 31 or the negative electrode 32 by laser welding to achieve fixation. The welding position of the positive electrode 31 is lower than the welding position of the negative electrode 32.

[0035] The cooling method for the supercapacitor module in this embodiment can also be applied to products such as lithium-ion batteries and sodium-ion batteries.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model's technical solution.

Claims

1. A novel heat dissipation structure for a supercapacitor module, characterized in that: It includes a cooling layer, a heat-conducting layer on top of the cooling layer, and several supercapacitor cells on top of the heat-conducting layer. Each supercapacitor cell has a positive and a negative electrode at the end away from the cooling layer. Connecting pieces are also connected between the supercapacitor cells. One end of the connecting piece is connected to the positive electrode of a supercapacitor cell, and the other end is connected to the negative electrode of another supercapacitor cell.

2. The heat dissipation structure of a novel supercapacitor module according to claim 1, characterized in that: The thermally conductive layer is a thermally conductive silicone grease layer, and the supercapacitor cells are confined within the cured thermally conductive layer.

3. The heat dissipation structure of a novel supercapacitor module according to claim 1 or 2, characterized in that: The cooling layer is in direct contact with the outer casing of the supercapacitor cell.

4. The heat dissipation structure of a novel supercapacitor module according to claim 1, characterized in that: Coolant flows through the cooling layer.

5. A heat dissipation structure for a novel supercapacitor module according to claim 1 or 4, characterized in that: The cooling layer is a cooling plate or a cooling serpentine tube.

6. The heat dissipation structure of a novel supercapacitor module according to claim 1, characterized in that: The connecting piece includes an elastic stress joint and connecting portions on both sides of the elastic stress joint.

7. The heat dissipation structure of a novel supercapacitor module according to claim 6, characterized in that: The elastic stress joint is U-shaped, and the connecting part is connected to the corresponding end of the elastic stress joint.

8. The heat dissipation structure of a novel supercapacitor module according to claim 7, characterized in that: The elastic stress joint includes a first horizontal section in the middle and second vertical sections on both sides, with the first horizontal section and the second vertical section arranged perpendicularly to each other.

9. The heat dissipation structure of a novel supercapacitor module according to claim 1, characterized in that: The supercapacitor cell also includes an insulating device located between its positive and negative electrodes.

10. A novel heat dissipation structure for a supercapacitor module according to claim 1 or 9, characterized in that: The connecting piece is welded between two supercapacitor cells.

Images