A leak-proof and explosion-proof leaded supercapacitor

Abstract

This utility model discloses a leak-proof and explosion-proof leaded supercapacitor, relating to the field of supercapacitor technology. It solves the problem that existing leak-proof sealing methods, when used for extended periods in high-temperature or high-temperature-humidity environments, are prone to explosion due to the lack of a pressure relief mechanism. The device includes a supercapacitor cell and a leak-proof outer shell. The supercapacitor cell has a pressure relief valve at its lower end and a positioning groove around its outer circumference. The leak-proof outer shell is fitted over the supercapacitor cell, exposing the pressure relief valve. A first limiting component is located inside the positioning groove on the inner side of the leak-proof outer shell. The upper end of the leak-proof outer shell is higher than the supercapacitor cell, forming a disc-shaped space with the upper surface of the supercapacitor cell. An adhesive layer is placed within this disc-shaped space, covering the lead wire at the upper end of the supercapacitor cell. This achieves the effect of solving the leakage problem without obstructing the capacitor's pressure relief valve.

Description

Technical Field

[0001] This utility model relates to the field of supercapacitor technology, and in particular to a leaded supercapacitor that is leak-proof and explosion-proof. Background Technology

[0002] Supercapacitors are a new type of green and environmentally friendly energy storage device. They have advantages such as short charging and discharging times, long cycle life, high power density, wide operating temperature range, and environmental friendliness, making them widely used in transportation, power, communications, defense, and electronics industries. In smart meters, leaded supercapacitors are used as backup power sources for the internal RTC circuit to maintain continuous operation at specified accuracy during battery failure or replacement. Due to their small size, ability to meet the stringent operating temperature requirements of smart meters (-40℃ to +85℃), and long service life, leaded supercapacitors provide a reliable guarantee for the long-term reliable operation of smart meters. More importantly, the considerable specific energy and relatively simple charging and discharging management circuit design of leaded supercapacitors greatly simplify the design of the RTC backup power source. Electrolyte leakage from the leads of supercapacitors used in smart meters (electricity meters, water meters, gas meters) is a common reliability issue. Essentially, electrolyte leaks from the sealed area between the leads and the casing, which is closely related to product design, material selection, manufacturing process, and operating environment. The main reason is that acetonitrile-based electrolytes, under high voltage and high temperature conditions, generate a large amount of gas, causing an increase in internal pressure. Since the free end of the lead protrudes from the rubber stopper, when the pressure reaches a certain level, electrolyte may leak from between the lead and the stopper, leading to decreased capacitor performance or even failure. More importantly, the leaked electrolyte can affect the entire circuit, corroding the circuit board and causing short circuits.

[0003] Existing methods for preventing leakage and sealing mainly involve filling the outer casing of lead-type supercapacitors with sealant to eliminate leakage from the supercapacitor pins. Although these methods solve the sealing problem to some extent, when used for a long time in high-temperature or high-temperature and high-humidity environments, the lack of a pressure relief mechanism in the high-sealing system can easily lead to the inability to release pressure and cause serious explosion consequences. Utility Model Content

[0004] The purpose of this invention is to provide a leaded supercapacitor that is leak-proof and explosion-proof. It solves the problem of pin leakage during long-term use in high-temperature or high-temperature and high-humidity environments, and does not block the capacitor's pressure relief valve, thus improving safety.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A leak-proof and explosion-proof leaded supercapacitor includes a supercapacitor cell and a leak-proof outer shell. The supercapacitor cell has a pressure relief valve at its lower end and a positioning groove around its outer periphery. The leak-proof outer shell is fitted over the supercapacitor cell, with an opening at its lower end exposing the pressure relief valve. A first limiting component is provided inside the leak-proof outer shell, which is confined within the positioning groove. The upper end of the leak-proof outer shell is higher than the supercapacitor cell, and the leak-proof outer shell and the upper surface of the supercapacitor cell form a disc-shaped space. An adhesive layer is provided within the disc-shaped space, covering the lead wire at the upper end of the supercapacitor cell.

[0006] By adopting the above technical solution, the leak-proof housing achieves leak prevention during long-term use in high temperature or high temperature and humidity environments through the glue layer in the upper disc-shaped space. Furthermore, the pressure relief valve exposed at the lower end of the leak-proof housing avoids serious explosion consequences caused by the inability to release pressure. The leak-proof housing is installed and positioned with the first limiting member through the positioning groove, which facilitates operations such as glue filling. Its structure is stable and has high safety.

[0007] Furthermore, the first limiting component includes a ring of elastic pins, which are fixed to the inner periphery of the leak-proof housing.

[0008] By adopting the above technical solution, the elastic pin is fixed to the inner periphery of the leak-proof outer shell and is fixed in the positioning groove of the supercapacitor cell through elastic positioning. The assembly is completed with the help of potting, which facilitates the processing and assembly work.

[0009] Furthermore, a chamfer is formed around the outer periphery of the upper end of the supercapacitor cell.

[0010] By adopting the above technical solution, the flexible locking pin can be installed downwards through elasticity, improving the stability and ease of operation.

[0011] Furthermore, a second limiting component is provided inside the leak-proof outer shell. The second limiting component abuts against the upper end of the supercapacitor cell, and the potting layer covers the second limiting component.

[0012] By adopting the above technical solution, the gap between the potting layer and the supercapacitor cell is reduced, the amount of potting required is reduced and its process stability is improved, and it is convenient to confirm whether the leak-proof housing is installed in place during assembly.

[0013] Furthermore, the second limiting component includes an annular step connected to the periphery of the leak-proof housing.

[0014] By adopting the above technical solution, the annular step abuts against the upper end of the supercapacitor cell, shielding the chamfer and gap positions, thereby improving the stability of potting and the ease of assembly.

[0015] Furthermore, the leak-proof outer casing is designed to be continuous from top to bottom.

[0016] By adopting the above technical solution, the processing and assembly of the leak-proof outer shell can be facilitated.

[0017] Furthermore, the leak-proof outer casing only covers the upper part of the supercapacitor cell.

[0018] By adopting the above technical solution, the consumption of materials for the leak-proof outer shell is reduced, and the production cost is lowered.

[0019] Furthermore, the first limiting component is located in the middle of the leak-proof outer shell.

[0020] By adopting the above technical solution, it is convenient to fix the first limiting component first. Since it is in the middle position, when fixing the second limiting component, it can be installed on either side of the leak-proof housing without having to distinguish the front and back, which facilitates processing.

[0021] In summary, this utility model has the following beneficial effects: The leak-proof housing prevents leakage during prolonged use in high-temperature or high-temperature and high-humidity environments through the potting layer in the upper disc-shaped space. Furthermore, the pressure relief valve exposed at the lower end of the leak-proof housing prevents serious explosions caused by failure to release pressure, effectively improving the service life of the supercapacitor and preventing leaked electrolyte from affecting the circuit, corroding the circuit board, and causing short circuits. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a leaded supercapacitor that is leak-proof and explosion-proof according to this utility model. Figure 2 This is a schematic diagram of the end face of the leak-proof outer casing portion in a leaded supercapacitor that is leak-proof and explosion-proof.

[0023] In the diagram, 1. Supercapacitor cell; 2. Leak-proof housing; 3. Pressure relief valve; 4. Positioning groove; 5. Encapsulation layer; 6. Elastic locking pin; 7. Annular step. Detailed Implementation

[0024] 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.

[0025] A type of leak-proof and explosion-proof leaded supercapacitor, such as... Figure 1As shown, the device includes a supercapacitor cell 1 and a leak-proof outer casing 2. The supercapacitor cell 1 has a pressure relief valve 3 at its lower end and a positioning groove 4 around its outer periphery. The leak-proof outer casing 2 is fitted over the supercapacitor cell 1, and its lower end is open, exposing the pressure relief valve 3. In this embodiment, in order to facilitate the processing and assembly of the leak-proof housing 2, reduce the material consumption of the leak-proof housing 2, and reduce production costs, the leak-proof housing 2 is designed to be a through-cylinder shape, with the leak-proof housing 2 covering only the upper part of the supercapacitor cell 1, so that the leak-proof housing 2 can expose the pressure relief valve 3 at the lower end of the supercapacitor cell 1, thus avoiding serious explosion consequences caused by the inability to relieve pressure.

[0026] like Figure 1 As shown, the upper end of the leak-proof housing 2 is higher than that of the supercapacitor cell 1. The leak-proof housing 2 and the upper surface of the supercapacitor cell 1 form a disc-shaped space. An adhesive layer 5 is provided in the disc-shaped space, which covers the lead wire at the upper end of the supercapacitor cell 1. After the leak-proof housing 2 is installed, adhesive is injected into its disc-shaped space and left to cure, forming the adhesive layer 5, which covers the lead wire at the upper end of the supercapacitor cell 1, thus achieving leak prevention during long-term use in high temperature or high temperature and high humidity environments.

[0027] like Figure 1 As shown, a first limiting component is provided on the inner side of the leak-proof outer shell 2. The first limiting component is limited within the positioning groove 4 to facilitate operations such as potting. In this embodiment, the first limiting component includes a ring of elastic locking pins 6, which are fixed to the inner circumference of the leak-proof outer shell 2 (to facilitate the downward installation of the elastic locking pins 6 through elasticity, a chamfer is formed on the outer circumference of the upper end of the supercapacitor cell 1). It is fixed by elastic positioning within the positioning groove 4 of the supercapacitor cell 1. In other embodiments, it can also be replaced by radial rivets or other structures, which can also be fixed by rolling a groove around the leak-proof outer shell 2 after installation to engage with the positioning groove 4.

[0028] like Figure 1 and Figure 2 As shown, a second limiting component is also provided inside the leak-proof housing 2. The second limiting component abuts against the upper end of the supercapacitor cell 1, and the potting layer 5 covers the second limiting component to facilitate confirmation of whether the leak-proof housing 2 is installed in place during assembly. In this embodiment, the second limiting component includes an annular step 7 welded and fixed to the inner circumference of the leak-proof outer shell 2. The annular step 7 abuts against the upper end of the supercapacitor cell 1, blocking the chamfer and gap positions, thus improving the stability of the potting and the ease of assembly. Before welding, an elastic locking pin 6 is installed and fixed to the middle position of the leak-proof outer shell 2 by means of glue or other methods. Since it is in the middle position, when welding and fixing the annular step 7, it can be installed on either side of the leak-proof outer shell 2 without having to distinguish the front and back, which facilitates processing.

[0029] 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 leak-proof and explosion-proof leaded supercapacitor, characterized in that: The device includes a supercapacitor cell and a leak-proof housing. The supercapacitor cell has a pressure relief valve at its lower end and a positioning groove around its outer periphery. The leak-proof housing is fitted over the supercapacitor cell, with an opening at its lower end exposing the pressure relief valve. A first limiting component is located inside the leak-proof housing, which is confined within the positioning groove. The upper end of the leak-proof housing is higher than the supercapacitor cell, and the leak-proof housing and the upper surface of the supercapacitor cell form a disc-shaped space. A potting layer is provided within the disc-shaped space, covering the leads at the upper end of the supercapacitor cell.

2. The leaded supercapacitor with leak-proof and explosion-proof characteristics according to claim 1, characterized in that: The first limiting component includes a ring of elastic pins, which are fixed to the inner periphery of the leak-proof housing.

3. A leaded supercapacitor that is leak-proof and explosion-proof according to claim 1 or 2, characterized in that: A chamfer is formed around the outer periphery of the upper end of the supercapacitor cell.

4. The leaded supercapacitor with leak-proof and explosion-proof characteristics according to claim 1, characterized in that: The leak-proof outer shell is also provided with a second limiting component, which abuts against the upper end of the supercapacitor cell, and the potting layer covers the second limiting component.

5. A leaded supercapacitor that is leak-proof and explosion-proof according to claim 4, characterized in that: The second limiting component includes an annular step connected to the inner periphery of the leak-proof housing.

6. The leaded supercapacitor with leak-proof and explosion-proof characteristics according to claim 1, characterized in that: The leak-proof outer shell is designed to be continuous from top to bottom.

7. A leaded supercapacitor that is leak-proof and explosion-proof according to claim 6, characterized in that: The leak-proof outer casing only covers the upper part of the supercapacitor cell.

8. A leaded supercapacitor that is leak-proof and explosion-proof according to claim 7, characterized in that: The first limiting component is located in the middle of the leak-proof outer shell.

Images