Energy storage device

Abstract

The invention discloses an energy storage device, which comprises an energy storage battery and a supercapacitor module which are connected with each other, wherein a control device is arranged on the circuits of the energy storage battery and the supercapacitor module to control the charge and discharge of the energy storage battery and the supercapacitor module. The control device comprises a central processing unit, a pre-charge control circuit, a shunting control circuit and a discharge control and under-voltage protection circuit, wherein the pre-charge control circuit, the shunting control circuit and the discharge control and under-voltage protection circuit are electrically connected with and controlled by the central processing unit respectively. According to the energy storage device, the state of the circuit is analyzed and controlled by the control device; and the energy storage device is charged and discharged in different ways in different states. Furthermore, the aim of incorporating the conventional energy storage battery into the supercapacitor module in any state of charge can be achieved, and the normal work of the energy storage device can be ensured by the spontaneous regulation and control of the control circuit.

Description

Technical field: [0001] The invention relates to a device for storing energy, in particular to an energy storage device based on a supercapacitor module. Background technique: [0002] Traditional energy storage devices are mainly lead-acid batteries. Although their performance is relatively stable and their cost is relatively low, due to their large size, heavy structure, and the serious environmental pollution of lead used as a raw material, they will gradually be used. eliminated by society. [0003] Compared with the traditional energy storage device lead-acid battery, the lithium-ion battery developed in recent years has a certain improvement in discharge rate and energy density, and has less environmental pollution; but due to its own characteristics, its large The rate charge and discharge performance is poor; it also limits its application in electric vehicles, electric bicycles and other occasions that require high rate charge and discharge. [0004] In order to m...

AI Technical Summary

Problems solved by technology

[0006] However, due to the different characteristics of the supercapacitor module and the energy storage battery, when the supercapacitor module is connected to the energy storage device, if the internal circuit such as the charging and discharging process is not controlled, the energy storage device will often be overcharged. On the other hand, if the energy storage device is left unused for a long time after charging, the leakage current of the supercapacitor is relatively large, if the supercapacitor module and the traditional storage device are not To make a certain schedule for the energy flow between the energy storage batteries, the supercapacitor module may over-discharge the voltage of the energy storage battery connected to it, which will seriously affect the performance of the energy storage device. In extreme cases , and even cause safety hazards

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