CN201117440Y - Super capacitor for auxiliary power of electric bicycle - Google Patents

Abstract

The utility model discloses a supercapacitor for auxiliary power of electric bicycles, which is characterized in that the inner cavity of the shell is provided with 3 to 6 isolated rectangular grids, each grid is provided with a capacitor unit formed by a plurality of supercapacitor monomers connected in series, each unit is connected in parallel with a voltage equalizer, the units are connected in series or in parallel, the outer layer of each monomer is an aluminum-plastic film soft package with an air outlet, and each unit has a one-way exhaust valve on the top. The utility model has a compact structure, a small volume, a light weight, a high specific energy and specific power, the voltage of each unit is balanced during charging, the gas can be discharged in time during use, and the overall performance is good. The supercapacitor is installed on an electric bicycle and used in conjunction with a lead-acid battery, which can effectively improve the starting performance of the electric bicycle and increase the service life of the battery.

Description

Super capacitor for auxiliary power of electric bicycle

technical field

The utility model relates to a supercapacitor, in particular to a supercapacitor group used for auxiliary power supply of an electric bicycle.

Background technique

Electric bicycles generally use lead-acid batteries as the core power source. The quality of the battery directly affects the normal operation of the electric bicycle. At the same time, the battery is a consumable and the price is relatively high. Therefore, the battery can be kept in good working condition and its use can be extended. Lifespan, no matter from environmental protection or economic point of view, has very important practical significance. When electric bicycles start, accelerate, and climb slopes, the battery needs to provide a large instantaneous current, but as the discharge current density increases, the service life of the battery will be reduced, because the high current density will cause the positive lead dioxide to loosen and fall off, resulting in premature discharge of the battery. fail.

Combining supercapacitors and lead-acid batteries to form a hybrid power supply is an effective way to solve the above problems. However, the disadvantage is that the existing supercapacitors are not enough to provide the instantaneous high current required by electric bicycles. If the supercapacitors are used in combination, their volume and weight will increase, exceeding the requirements for use, and when charging, the capacitor units will Unbalanced voltage, coupled with the increase of gas generated during use, and poor exhaust, affect the performance of the overall supercapacitor.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a supercapacitor suitable for auxiliary power of electric bicycles. The supercapacitor has compact structure, small volume, light weight, large instantaneous output current and good overall performance. , used together with lead-acid batteries can greatly increase the service life of batteries and meet the requirements of automatic bicycles.

The technical scheme of the utility model is: the supercapacitor for auxiliary power of the electric bicycle includes a casing, an upper cover, and a lead-out terminal. A capacitor unit, each unit is connected in series or in parallel, each unit is composed of multiple supercapacitor monomers in series, each unit is connected in parallel with a voltage equalizer, and the outer layer of each supercapacitor monomer is aluminum-plastic film flexible packaging.

A further solution is that the aluminum-plastic film flexible packaging of the supercapacitor monomer has air outlet holes; the top of each capacitor unit has a one-way exhaust valve.

Supercapacitors are new power electronic components that have emerged in recent years with breakthroughs in material science. It fills the gap in specific energy and specific power between ordinary capacitors and batteries. It has a capacitance as high as thousands of farads. It is also safe, reliable and wide in application. It is a breakthrough in improving and solving the application of electric energy and power performance. components. Supercapacitor is also a green and environment-friendly product, which is energy-saving and environmentally friendly, and will not have negative effects on users and the environment. It is a green and healthy power supply product. It is combined with the battery to form a hybrid battery. When the electric bicycle starts and accelerates to climb, the super capacitor provides an instantaneous high current, so that the battery is protected, and at the same time, the requirements for the energy density and capacity of the battery are reduced. When the electric vehicle is running at a constant speed, the battery charges the supercapacitor. When the two are used together, the life of the battery is greatly increased. When the electric vehicle brakes in an emergency, the motor can charge the supercapacitor to convert the kinetic energy into electric energy and store it. After the electric bicycle is fully charged once, the mileage can be greatly increased.

In the supercapacitor provided by the utility model, a plurality of capacitor units are arranged in one shell, which are connected in series or in parallel as required, and each unit is composed of a plurality of supercapacitor monomers, generally 3 to 6, each monomer Aluminum-plastic film soft packaging is adopted. In this way, the utility model can not only provide instantaneous large current, but also has compact structure, small volume, light weight, and high specific energy and specific power; at the same time, each capacitor unit is connected in parallel with a voltage equalizer. The unit voltage is balanced, and the gas generated during use can be discharged in time through the air outlet on the soft package and the exhaust valve of each unit, so as to ensure its performance.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

Detailed ways

Referring to the accompanying drawings, the inner cavity of the housing 6 is provided with six isolated rectangular grids, and each rectangular grid is provided with a capacitor unit composed of three supercapacitor monomers 3 connected in series, and each unit is connected by a connecting strip 4 Each unit is connected in parallel with a voltage equalizer 5. The outer layer of each supercapacitor is made of aluminum-plastic film soft packaging, and there are air holes on the soft packaging. The top of each capacitor unit is provided with a row Air valve 2. There are three 2.5V50F supercapacitor monomers in each unit of the supercapacitor. After each unit is connected in series, it outputs through the positive pole 8 and the negative pole 7 to form a 45V3F electric bicycle auxiliary power supercapacitor.

Most electric bicycles use 36V10Ah lead-acid batteries as the power supply, and their open circuit voltage is above 40V. The power of an electric bicycle is about 200W when it is running normally, and the output current of the battery is 5-6A, but in the case of starting, accelerating, etc., the output current of the battery is as high as 12-16A. Taking the start of an electric bicycle as an example, if it is started by the battery alone, the output current of the battery will reach 15A. The supercapacitor is installed on the automatic bicycle and used in parallel with the lead-acid battery. The supercapacitor outputs 6A at the moment of starting, and the output current of the battery is reduced to 9A, which can effectively improve the starting performance of the electric bicycle and increase the service life of the battery.

Claims (3)

1, a kind of super capacitor for auxiliary power of electric bicycle, comprise shell, loam cake, leading-out terminal, it is characterized in that shell inner cavity is provided with 3～6 isolated rectangular grid, be provided with a capacitor unit in each rectangular grid, serial or parallel connection between each unit, each unit is by many monomer series-connected the combining of ultracapacitor, each unit voltage equalizer in parallel, and the skin of every ultracapacitor monomer is the aluminum plastic film flexible package.

2,, it is characterized in that in the aluminum plastic film flexible package of described ultracapacitor monomer venthole being arranged by the described super capacitor for auxiliary power of electric bicycle of claim 1.

3, by the described super capacitor for auxiliary power of electric bicycle of claim 1, it is characterized in that one-way exhaust valve is arranged at the top of each capacitor unit.

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