Storage battery and super capacitor hybrid power supply applied to pulse current loads

A supercapacitor, pulse current technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of passive structure composite power supply, the effect of passive structure is not obvious, the load performance is affected, and the terminal voltage changes greatly, and it is easy to package. and integration, less quantity, smoothing effect of discharge current

Inactive Publication Date: 2013-06-05
JIANGSU UNIV
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  • Abstract
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Problems solved by technology

However, this structure also has obvious disadvantages, such as battery packs and supercapacitor packs must maintain consistent terminal voltage, lack of flexibility in design, terminal voltage changes greatly with the charging and discharging process, and affect load performance, etc.
At the same time, if the impact of the pulse current load is large, the effect of the passive structure composite power supply is not obvious

Method used

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  • Storage battery and super capacitor hybrid power supply applied to pulse current loads
  • Storage battery and super capacitor hybrid power supply applied to pulse current loads
  • Storage battery and super capacitor hybrid power supply applied to pulse current loads

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] The structure of a composite power supply of a storage battery and a supercapacitor applied to a pulse current load of the present invention is as follows: figure 1 As shown in the figure, for the storage battery; is the internal resistance of the battery; for the supercapacitor, is the internal resistance of the supercapacitor; For the pulse current load. The battery is connected in parallel with the supercapacitor through a bidirectional DC-DC power converter. Due to the current conversion effect of the power converter, the charging and discharging current of the battery can be controlled, thereby improving the performance of the composite power supply. According to the actual situation, the power converter can be set to step-down and step-up to match the voltage of the battery and the supercapacitor.

[0024] The decomposition diagram of ...

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PUM

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Abstract

The invention discloses a storage battery and super capacitor hybrid power supply applied to pulse current loads. A storage battery is connected with a super capacitor in parallel through a bi-directional direct current to direct current (DC-DC) converter, the topology of the bi-directional DC-DC converter is a non-isolated half-bridge structure, the purpose of the control is to enable the output current of the converter to be equal to the average current of the loads so as to ensure that the storage battery works in a constant current output mode through the power converter. Under the action of the pulse current loads, the discharge current of the storage battery of the hybrid power supply in the half-active structure is relatively smooth, the storage battery works in the constant-current mode through the bi-directional DC-DC converter, the discharging process is optimized, and the cycle life is prolonged.

Description

technical field [0001] The invention relates to an energy storage device, in particular to an energy storage device which combines a storage battery and a supercapacitor to form a composite power supply. Background technique [0002] With the development of science and technology, there are more and more loads with pulsating power, such as digital mobile devices, electric vehicles, and directed energy weapons. The typical feature is that the peak power is high, but the average power is low, and the power supply is required to have a high power output. ability. [0003] Traditional batteries have the advantages of low cost, mature technology, high safety, and high energy density, but their internal resistance is large, specific power is small, and cycle life is short. [0004] As a new type of energy storage device, supercapacitors have attracted more and more attention from scholars at home and abroad due to their advantages such as high power density, excellent instantaneo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/34
CPCY02E70/40Y02E60/10
Inventor 孙玉坤王琪黄永红
Owner JIANGSU UNIV
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