Super capacitor cover

Abstract

The utility model belongs to the field of capacitors, and particularly relates to a super capacitor cover, which comprises a cover and two riveting units arranged on the cover. The two riveting units are a riveting positive electrode riveting unit and a riveting negative electrode riveting unit; each riveting unit comprises a terminal, at least two positioning holes formed in the terminal, and rivets corresponding to the positioning holes; and the terminal is riveted with the cover through a rivet on the positioning hole. According to the super capacitor cover, a multi-rivet structure is adopted, the riveting stability is higher, the heavy current passing capacity is stronger, the current distribution is more uniform, a multi-loop structure is adopted, the product resistance is effectively reduced, the process is simple and mature, the total material and manufacturing cost of the cover is lower, the production and popularization are facilitated, and the super capacitor cover has great production practice significance.

Description

Technical Field

[0001] The utility model belongs to the field of capacitors, and in particular relates to a super capacitor cover. Background Art

[0002] Supercapacitors have the advantages of high capacity (up to thousands of farads), high power (1k~100kW / kg) and ultra-long service life (≥500,000 times). They are widely used in electric vehicles, wind and solar power generation, aerospace, national defense, communications and other fields. They have become one of the important frontier technologies in the country's long-term development of the energy field.

[0003] At present, the cover of medium-capacity supercapacitors generally uses bakelite and rubber as the cover body. The terminals (positive terminal and negative terminal) are riveted to the cover body after overall electroplating. The positive and negative electrode foil strips inside the capacitor are also connected to the cover rivets by riveting. The main supercapacitor products on the market all use a single riveting structure. The positive and negative electrode foil strips are connected to the cover body by only one rivet. This method causes a large riveting resistance and poor high current passing performance. Utility Model Content

[0004] The utility model aims to overcome the defects in the prior art and provide a super capacitor cover.

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

[0006] A supercapacitor cover comprises a cover and two riveting units arranged on the cover; the two riveting units are a positive electrode riveting unit and a negative electrode riveting unit; each of the riveting units comprises a terminal, at least two positioning holes arranged on the terminal and rivets corresponding to the positioning holes; the terminal is riveted to the cover through the rivets on the positioning holes.

[0007] The terminal comprises a connecting plate and symmetrical pole ears arranged on both sides of the connecting plate; the positioning hole is arranged on the connecting plate.

[0008] The symmetrical pole lugs are cylindrical, sheet-shaped, or horn-shaped.

[0009] The rivet is a split rivet or an integrally formed rivet; the integrally formed rivet is integrally formed with the terminal; the split rivet is separately provided from the terminal.

[0010] The positive electrode riveting unit comprises a positive electrode terminal, at least two positive electrode positioning holes arranged on the positive electrode terminal, and a positive electrode rivet corresponding to the positive electrode positioning holes;

[0011] The negative electrode riveting unit comprises a negative electrode terminal, at least two negative electrode positioning holes arranged on the negative electrode terminal, and a positive electrode rivet corresponding to the negative electrode positioning holes.

[0012] A plurality of the positive electrode rivets are connected to the positive electrode foil strip in the capacitor; a plurality of the negative electrode rivets are connected to the negative electrode foil strip in the capacitor.

[0013] The positive electrode rivet is connected to the positive electrode foil strip by laser welding or riveting; the negative electrode rivet is connected to the negative electrode foil strip by laser welding or riveting.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The supercapacitor cover of the utility model adopts a multi-rivet structure, has higher riveting stability, stronger large current passing capacity, more uniform current distribution, and a multi-loop structure to effectively reduce product resistance. The process is simple and mature, and the total material and manufacturing costs of the cover are low, which is conducive to production popularization and has great production practice significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the terminal of the supercapacitor cover of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0018] Figure 3 This is a schematic diagram of the cover structure of the supercapacitor cover of the utility model;

[0019] Figure 4 This is a schematic diagram of the overall structure of the supercapacitor cover of the utility model;

[0020] Figure 5 This is a schematic diagram of the connection between the capacitor cover and the internal foil strip of the capacitor according to the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment.

[0022] Figure 1-5 A supercapacitor cover is shown, which includes a cover 1 and two riveting units arranged on the cover 1; the two riveting units are a positive electrode riveting unit and a negative electrode riveting unit; each of the riveting units includes a terminal, at least two positioning holes 7 arranged on the terminal and a rivet 4 corresponding to the positioning hole; the terminal is riveted to the cover through the rivets on the positioning hole.

[0023] Multiple positioning holes correspond to multiple rivets, and the terminal and the cover are connected by a multi-rivet connection structure, which makes the stability higher, and the number of rivets is 2 or more.

[0024] The terminal comprises a connecting plate 3 and symmetrical pole ears 2 arranged on both sides of the connecting plate 3 ; the positioning hole 4 is arranged on the connecting plate 3 .

[0025] The symmetrical pole ear is in the shape of a cylinder, a sheet, or a horn. The symmetrical pole ear structure can increase the area through which the current passes and make the current pass more evenly.

[0026] The rivet is a split rivet or an integrally formed rivet; the split rivet is separately provided from the terminal. As a preferred form, the integrally formed rivet is integrally formed with the terminal and then riveted to the cover to further reduce the connection resistance.

[0027] The positive electrode riveting unit comprises a positive electrode terminal, at least two positive electrode positioning holes arranged on the positive electrode terminal, and a positive electrode rivet corresponding to the positive electrode positioning holes;

[0028] The negative electrode riveting unit comprises a negative electrode terminal, at least two negative electrode positioning holes arranged on the negative electrode terminal, and a positive electrode rivet corresponding to the negative electrode positioning holes.

[0029] The materials of the positive terminal and the negative terminal independently include aluminum alloy, copper alloy, and alloy steel; the outer surfaces of the positive terminal and the negative terminal are independently provided with an electroplating layer, and the electroplating layer is one or more of nickel, tin, and zinc.

[0030] The plurality of positive electrode rivets are connected to the positive electrode foil strip 5 in the capacitor; the plurality of negative electrode rivets are connected to the negative electrode foil strip 6 in the capacitor.

[0031] A plurality of the positive electrode rivets and a plurality of the negative electrode rivets are simultaneously connected to the internal foil strip of the capacitor by riveting or laser welding to form a multi-path parallel structure, which can effectively reduce the riveting or welding loop resistance compared to a single-path connection.

[0032] The positive electrode rivet is connected to the positive electrode foil strip by laser welding or riveting; the negative electrode rivet is connected to the negative electrode foil strip by laser welding or riveting.

[0033] In summary, it can be seen that the supercapacitor cover of the utility model adopts a multi-rivet structure, has higher riveting stability, stronger large current passing capacity, more uniform current distribution, and a multi-loop structure, which effectively reduces the product resistance. The process is simple and mature, and the total material and manufacturing cost of the cover is low, which is conducive to production popularization and has great production practical significance.

[0034] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A supercapacitor cover, characterized in that: It includes a cover and two riveting units arranged on the cover; the two riveting units are a positive riveting unit and a negative riveting unit; each of the riveting units includes a terminal, at least two positioning holes arranged on the terminal and rivets corresponding to the positioning holes; the terminal is riveted to the cover through the rivets on the positioning holes.

2. The supercapacitor cover according to claim 1, characterized in that: The terminal comprises a connecting plate and symmetrical pole ears arranged on both sides of the connecting plate; the positioning hole is arranged on the connecting plate.

3. The supercapacitor cover according to claim 2, characterized in that: The symmetrical pole lugs are cylindrical, sheet-shaped, or horn-shaped.

4. The supercapacitor cover according to claim 1, characterized in that: The rivet is a split rivet or an integrally formed rivet; the integrally formed rivet is integrally formed with the terminal; The split rivet is separately arranged from the terminal.

5. The supercapacitor cover according to claim 1, characterized in that: The positive electrode riveting unit comprises a positive electrode terminal, at least two positive electrode positioning holes arranged on the positive electrode terminal, and a positive electrode rivet corresponding to the positive electrode positioning holes; The negative electrode riveting unit comprises a negative electrode terminal, at least two negative electrode positioning holes arranged on the negative electrode terminal, and negative electrode rivets corresponding to the negative electrode positioning holes.

6. The supercapacitor cover according to claim 5, characterized in that: A plurality of the positive electrode rivets are connected to the positive electrode foil strip in the capacitor; a plurality of the negative electrode rivets are connected to the negative electrode foil strip in the capacitor.

7. The supercapacitor cover according to claim 6, characterized in that: The positive electrode rivet is connected to the positive electrode foil strip by laser welding or riveting; the negative electrode rivet is connected to the negative electrode foil strip by laser welding or riveting.

Images