The button double electric layer capacitor
Affiliated technical field
The invention belongs to field of capacitor manufacture, particularly large capacity button double electric layer capacitor manufactures and designs.
Background technology
The button double electric layer capacitor generally has high-energy-density, and it is outstanding to discharge and recharge frequency than lithium secondary battery.In recent years, the backup battery that is used as in the portable machine with the close friend's that it was had feature uses, and it mainly is to exist with the button form.
Existing double electric layer capacitor structure, the diaphragm paper of insulating properties be placed on double layer electrodes and the centre, wherein double layer electrodes uses conductive adhesive to be attached on the upper cover part that forms with stainless steel, and another double layer electrodes use conductive adhesive is attached on the lower cover part that forms with stainless steel.Nonaqueous electrolyte is charged into double layer electrodes and reaches in the insulating properties diaphragm paper space.Upper cover part and lower cover partly adopt insulating properties rubber sealing and insulation, and two terminals directly are welded on the outer surface of above-mentioned double electric layer capacitor upper and lower covers, form this capacitor both positive and negative polarity fishplate bar.
The upper cover part or the lower cover portion that form double electric layer capacitor have adopted stainless steel, and upper and lower covers pressing sealing property is the cushion rubber use high-performance industrial plastic of isolation and sealing manufacturing, the thermal endurance of this material; Sealing also can have sealant volatilization or the faulty problem of sealant in the course of processing at high temperature after the part of employing O-ring seal in the comprehensive or lower cover portion of cushion rubber was coated with a layer sealing agent; Occurred because the sealing of loam cake and lower cover is inadequate during the sealing of high-performance industrial plastic, many reasons all causes electrolyte leakage.
Summary of the invention:
Purpose of the present invention just is to overcome the defective of above-mentioned prior art, and the up and down sealing between cap and the cushion rubber of a kind of effective increase is provided, thereby prevents the button double electric layer capacitor of electrolyte leakage.
The technical scheme of taking for achieving the above object is:
Formed by lower cover part, upper cover part, insulating properties cushion rubber, layer electrode that power on, lower electricity layer electrode, the diaphragm paper of insulating properties, nonaqueous electrolyte; The diaphragm paper of insulating properties is placed on the centre of power on layer electrode and lower electricity layer electrode; Layer electrode that power on uses conductive adhesive to be attached on the loam cake inner side plane that forms with stainless steel, and lower electricity layer electrode uses conductive adhesive to be attached on the lower cover inner side plane that forms with stainless steel; Nonaqueous electrolyte is charged in double layer electrodes and the insulating properties diaphragm paper space; Upper cover part and lower cover partly adopt the insulation of insulating properties rubber sealing;
The connecting portion of the downward warpage that upper cover part is connected with upper plate by the upper plate of rondelle and the upwards side plate of warpage that is connected with connecting portion form, and the side plate of upper cover part and connecting portion contact portion are fitted fully.;
The side plate of loam cake and the bottom surface of connecting portion are smooth; The length of bottom surface tabular surface is not less than 0.3mm;
The side plate of upper cover part tilts to the connecting portion direction; The angle of inclination is 5-20 °;
The plane is shaped with 2-8 sprue gate projection on the insulating properties cushion rubber, and the sprue gate projection is evenly distributed on plane on the insulating properties cushion rubber.
The chimeric sealing paste of the loam cake of button double electric layer capacitor of the present invention and lower cover is combined, and makes it to be close to better with cushion rubber, has avoided the leakage of electrolyte, has improved quality and the useful life of double electric layer capacitor.
Description of drawings:
Fig. 1 is the single face schematic diagram of instance X axle of the loam cake of button double electric layer capacitor of the present invention;
Fig. 2 is that loam cake of the present invention is assembled schematic diagram with lower cover and cushion rubber in the button double electric layer capacitor;
Fig. 3 is the configuration diagram with the double electric layer capacitor of conventional X-axis cut-out;
Fig. 4 is the simplified schematic diagram of insulating properties cushion rubber.
Among the figure: lower cover part 12, upper cover part 11, insulating properties cushion rubber 13, layer electrode 14 that power on, lower electricity layer electrode 15, the diaphragm paper 16 of insulating properties, nonaqueous electrolyte 17, upper plate 111, side plate 112, connecting portion 113, bottom surface tabular surface length a, bottom surface 21a, tilt angle alpha.
Embodiment:
Formed by upper cover part 11, lower cover part 12, insulating properties cushion rubber 13, layer electrode 14 that power on, lower electricity layer electrode 15, the diaphragm paper 16 of insulating properties, nonaqueous electrolyte 17; The diaphragm paper 16 of insulating properties is placed on the centre of power on layer electrode 14 and lower electricity layer electrode 15; Layer electrode 14 that power on uses conductive adhesive to be attached on loam cake 11 inner side plane that form with stainless steel, and lower electricity layer electrode 15 uses conductive adhesive to be attached on lower cover 12 inner side plane that form with stainless steel; Nonaqueous electrolyte 17 is charged in layer electrode 14 that power on, lower electricity layer electrode 15 and insulating properties diaphragm paper 16 spaces; Loam cake 11 and lower cover 12 adopt insulating properties cushion rubber 13 sealed insulations, chimeric being integral;
The connecting portion 113 of the downward warpage that loam cake 11 is connected with upper plate by the upper plate 111 of rondelle and the upwards side plate 112 of warpage that is connected with connecting portion form, and side plate 112 and connecting portion 113 contact portions of loam cake 11 are fitted fully.
The side plate 112 of loam cake 11 and the bottom surface 21a of connecting portion 113 are smooth; Bottom surface tabular surface length a is not less than 0.3mm.
The side plate 112 of upper cover part 11 tilts to connecting portion 113 directions; Tilt angle alpha is 5-20 °.
The plane is shaped with 2-8 sprue gate projection 9 on insulating properties cushion rubber 13, and sprue gate projection 9 is evenly distributed on plane on the insulating properties cushion rubber 13.