Power transmission system for electromobile power conversion and energy storage station

A technology for electric vehicles and power transmission systems, applied in electric vehicles, vehicle energy storage, charging stations for charging mobile devices, etc. The effect of efficient conversion and improved stability

Pending Publication Date: 2018-08-03
宁波利维能储能系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a power transmission system for electric vehicle battery replacement and energy storage stations to solve the problems of single power transmission form, unstable power supply, and excessive operating costs

Method used

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  • Power transmission system for electromobile power conversion and energy storage station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The controller 60 turns on the energy storage circuit by controlling the switching device (not shown in the figure) in the energy storage circuit (grid 40-bidirectional AC-DC conversion module 50-DC bus 10-bidirectional DC-DC conversion unit 23) to close circuit, the controller 60 sends control signals to the bidirectional AC-DC conversion module 50, the bidirectional DC-DC conversion unit 23 and the charging and discharging unit 21, respectively controlling the bidirectional AC-DC conversion module 50 to perform AC to DC conversion, and controlling the bidirectional DC- The DC converting unit 23 converts the high-voltage direct current to the low-voltage direct current, and controls the charging and discharging unit 21 to perform a charging operation, so that the energy storage battery unit 22 stores electric energy.

Embodiment 2

[0029] The controller 60 turns on the discharge circuit by controlling the switching device (not shown in the figure) in the discharge circuit (bidirectional DC-DC conversion unit 23-DC bus 10-bidirectional AC-DC conversion module 50-grid 40) to close, The controller 60 sends control signals to the bidirectional AC-DC conversion module 50, the bidirectional DC-DC conversion unit 23 and the charging and discharging unit 21, respectively controlling the bidirectional AC-DC conversion module 50 to perform DC to AC conversion, and controlling the bidirectional DC-DC conversion The unit 23 converts the low-voltage direct current to the high-voltage direct current, and controls the charging and discharging unit 21 to perform a discharging operation, and feeds back the electric energy stored in the energy storage battery unit 22 to the grid 40 .

[0030] In addition, in the above two implementation manners, the controller 60 can also control the switch device (not shown in the figure)...

Embodiment 3

[0032] During the valley power period when the electricity price is low, the controller 60 can control the switching device (not shown in the figure) in the energy storage circuit (grid 40-AC-DC conversion module 50-DC bus 10-bidirectional DC-DC conversion unit 23) shown) is closed to turn on the energy storage circuit, the controller 60 sends control signals to the AC-DC conversion module 50, the bidirectional DC-DC conversion unit 23 and the charging and discharging unit 21, respectively controlling the AC-DC conversion module 50 to perform AC to For direct current conversion, control the bidirectional DC-DC conversion unit 23 to perform conversion from high-voltage direct current to low-voltage direct current, and control the charging and discharging unit 21 to perform a charging operation, so that the energy storage battery unit 22 stores electric energy.

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Abstract

The invention discloses a power transmission system for an electromobile power conversion and energy storage station. The power transmission system comprises a power grid, a two-way AC-DC conversion module, a direct current bus, an energy storage module, a charge module and a controller, the two-way AC-DC conversion module is connected between the direct current bus and the power grid, the energystorage module is connected with the direct current bus, the charge module is connected with the direct current bus, the charge module and the two-way AC-DC conversion module are both connected with the controller, and the controller is used for controlling the conversion direction of the two-way AC-DC conversion module and controlling a charge and discharge unit to charge or discharge. The two-way power transmission and conversion between the energy storage module and the power grid is realized, an electromobile is also stably charged under the condition of grid failure, the stored electric energy is fed back to the power grid to respond to the failure of the power grid; and in addition, the operation cost of an electromobile power conversion station is reduced by means of peak load shifting, and the stability of the power supply order of the power grid is improved.

Description

technical field [0001] The invention relates to the field of battery exchange for electric vehicles, and mainly relates to an electric vehicle battery exchange and a power transmission system for an energy storage station. Background technique [0002] With the rapid development and popularization of electric vehicles, the construction of electric vehicle charging and swapping stations has become particularly important. At present, most of the power sources of electric vehicle charging and swapping stations are power grids, or new energy power generation equipment such as wind power generation equipment and photovoltaic power generation equipment. The power transmission system of the electric vehicle charging and swapping station obtains electric energy from the grid or new energy power generation equipment, and uses the obtained electric energy to directly charge the rechargeable battery of the electric vehicle. The problem of providing power. In addition, due to the large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J7/00H02J7/34B60L11/18
CPCB60L53/80H02J3/32H02J7/0027H02J7/34Y02T10/70Y02T10/7072Y02T10/72
Inventor 孙晓东马克明帅凯杨永顺
Owner 宁波利维能储能系统有限公司
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