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Off-network optical-record power supply electric bus quick charging device and charging method

An electric bus and fast charging technology, which is applied in the direction of electric vehicle charging technology, battery circuit devices, charging stations for charging mobile devices, etc., can solve problems such as distribution network overload and distribution network load impact, to ensure normal driving, The effect of avoiding consumption and pollution to the grid environment

Inactive Publication Date: 2018-03-27
TRINASOLAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electric bus adopts the mains charging method, which will cause large-scale centralized connection of high-voltage and high-current DC chargers to the power grid, which will bring a large load impact to the distribution network and cause serious overload of the distribution network

Method used

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  • Off-network optical-record power supply electric bus quick charging device and charging method
  • Off-network optical-record power supply electric bus quick charging device and charging method
  • Off-network optical-record power supply electric bus quick charging device and charging method

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Embodiment 1

[0032] Such as figure 1 As shown, a fast charging device for electric buses powered by off-grid optical storage, including:

[0033] The charging interface 1 can be connected with the electric bus to provide electric energy for the electric bus;

[0034] A lithium battery pack 2, configured to provide electrical energy for the charging interface 1;

[0035] The supercapacitor bank 3 is connected in parallel with the lithium battery pack 2;

[0036] The photovoltaic power station 4 is electrically connected to the lithium battery pack 2 and the supercapacitor pack 3, and is used to provide electric energy for the lithium battery pack 2 and the supercapacitor pack 3;

[0037] A maximum power tracker 5 electrically connected to the photovoltaic power station 4;

[0038] The electric bus fast charging device powered by off-grid optical storage also includes two DC / DC converters 6, and the two DC / DC converters 6 are respectively connected between the photovoltaic power station 4...

Embodiment 2

[0045] Generally, the design of the total capacity of the power battery of an electric bus is based on the maximum mileage index in the design task book as the target value, combined with the motor power, and reversely calculated by the constant velocity method. In this embodiment, a conventional 12m two-axle pure electric city bus is taken as an example. At present, the energy consumption level of the actual bus road conditions is 1.1-1.3kW h / km (the energy consumption is 1.3-1.5kW h / km when the air conditioner is turned on in summer). km).

[0046] If the bus line mileage is calculated by M km and N stations, the average distance between two stations is M / N kilometers, see figure 2 . According to the design, the electric energy of the power battery that the vehicle needs to load every time it passes through two stations is 2.2M / N~2.6m / n kW·h. Considering that there is a certain charge and discharge loss value η, the fast charging device for electric buses powered by off-g...

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Abstract

The invention discloses an off-network optical-record power supply electric bus quick charging device and charging method. The off-network optical-record power supply electric bus quick charging device includes a charging interface which is used for supplying electric energy for an electric bus, a lithium battery pack which can be connected with the electric bus for supplying electric energy for the charging interface, a super-capacitor bank which is in parallel connection with the lithium battery pack, and a photovoltaic power station which is electrically connected with the lithium battery pack and the super-capacitor bank for supplying electric energy for the lithium battery pack and the super-capacitor bank. The off-network optical-record power supply electric bus quick charging devicecan quickly and efficiently supply the electric energy stored in an energy storage apparatus to the power battery of the electric vehicle so as to fundamentally avoid consuming the conventional energy resource and polluting the power grid environment. Besides, the off-network optical-record power supply electric bus quick charging device performs scientific and reasonable optimization on the charging facilities and charging points during the operating way of electric buses of cities and towns so as to enable the operating bus station to be charged with effective electric quantity in relatively shorter time to guarantee normal driving of the buses.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a fast charging device and a charging method for an electric bus powered by off-grid optical storage. Background technique [0002] As important renewable new energy sources, wind energy and solar energy have become the focus of clean energy applications. Combining wind, light distributed power and energy storage to form a hybrid power supply system not only takes advantage of the complementary advantages of wind energy and light energy in terms of time and geography, but also plays the role of energy storage in calming system fluctuations and protecting power balance. In previous studies, a single battery was often used as an energy storage device. Its short cycle life and low power density limit the ability of the battery to compensate for short-term power fluctuations, and also contradict the intermittent and random nature of new energy power generation. The hy...

Claims

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Application Information

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IPC IPC(8): H02J7/34H02J7/35H02J7/00B60L11/18
CPCB60L53/30B60L53/51B60L53/53B60L53/55B60L2200/18H02J7/0027H02J7/342H02J7/345H02J7/35Y02B10/10Y02T10/70Y02T10/7072Y02T10/72Y02T90/12
Inventor 王斌高纪凡陈维黄国昆栗娜
Owner TRINASOLAR CO LTD
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