Mixed battery pack comprising lithium power cell and super capacitor

Abstract

The invention discloses a mixing battery group consisting of a lithium power battery group and a super capacitor group. The mixing battery group comprises a rectifying circuit, a charging buffer circuit, a lithium power battery group consisting of a plurality of lithium power batteries, a super capacitor group consisting of a plurality of super capacitors, a main circuit of bilateral switch, an output switch and a signal collection and control circuit; the outer current or DC electrical source is connected with the input terminal of the main circuit by the rectifying circuit and the charging buffer circuit, and the output terminal of the main circuit is connected with the electric equipment by the output switch; the signal collection and control circuit comprises a controller, a bus bar voltage transducer, a lithium battery group voltage transducer, a lithium battery electric current transducer and an output current transducer. The invention can provide output of electric energy with high power and high energy stably, guarantee to be effectively connected with 220V effective value of electric equipment, and bear a certain degree of fluctuation of charging voltage and current, and guarantee the stability and convenience for electric energy supply and invisibility of power supply. The mixing battery group is characterized by small volume and convenient carrying.

Description

1. Technical field [0001] The invention relates to the field of a secondary power supply, in particular to a hybrid power supply system composed of two power supply devices, a lithium power battery unit and a supercapacitor unit. 2. Background technology [0002] Modern information warfare has very high requirements for power supplies, and ensuring a reliable supply of battlefield power supplies is an important part of achieving results. It is very important to solve the power supply that can provide high power and high reliability under field conditions or mobile conditions, and improve the safety and cycle life of power supply work in information operations. And with the development of the automobile industry, especially electric vehicles, the requirements for the safety and cycle life of electric energy work are very high, which cannot be met by existing battery packs. Therefore, new battery pack solutions must also be found. [0003] For the requirements of battery elec...

AI Technical Summary

Problems solved by technology

2) Small size, light weight, and must be easy to carry

[0008] The hybrid application of power battery and supercapacitor has been widely used in electric vehicles, and its application methods mainly include the following two methods: one is direct parallel connection , this method is generally applied to electrical equipment with a voltage lower than 60V, and is generally connected in parallel with a lead-acid battery. The output voltage is low, the stability is poor, and the fluctuation of the voltage cannot be controlled. difficult to realize

The other is that the supercapacitor is connected in parallel with the power battery after being boosted by a DC power converter DC / DC. Although this method can achieve control of output power and energy, the output power of the supercapacitor is subject to DC / DC conversion. Due to the limitation of device design, the advantages of high specific power of supercapacitors are often not fully utilized, and at the same time, the cost of the device is increased.

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