Wind-light energy and shore-electricity charged storage-battery electric ship and control method thereof

Abstract

The invention relates to a wind-light energy and shore-electricity charged storage-battery electric ship and a control method thereof. The electric ship comprises a catamaran body, wherein an electric propulsion device is respectively connected with a storage battery and a charger, the charger is connected with the storage battery, and an shore-electricity access device is arranged on the charger; a wind power generator and a solar battery plate are connected with the charger through a control desk; an alternating-current square-wave permanent-magnetic brushless direct-current motor controlled by a PWM (Pulse Width Modulation) technology and driven by a phase-decoupling type direct-current variable-frequency stepless speed-regulation controller is adopted in the electric propulsion device; the solar battery plate is also arranged on the catamaran body; a rapidly-chargeable lithium-iron phosphate power storage battery is adopted as the storage battery; and a plurality of temperature control devices are installed in a battery cabin for placing the storage battery. The invention greatly enhances the cruising capability of ships, avoids the occurrence of non-electric states, has high energy utilization efficiency, is safe and reliable and is beneficial to practical use.

Description

technical field [0001] The invention relates to an electric boat, that is, a control method, in particular to a battery electric boat with wind energy and shore power charging and a control method suitable for practical use. Background technique [0002] The existing traditional diesel engine ships occupy a dominant position, diesel engines are inefficient (below 30%) pollution, there is smoke, smell, noise, industrial oil and water, which cause serious pollution and damage to water bodies, aquatic organisms and the environment, and are not conducive to the health of the crew. The battery electric ship driven by the battery is the future development direction, with high efficiency (higher than 60%) and zero emission; Chinese patent 2008100483196 discloses a "full electric ship with solar power composite energy rechargeable battery", which can completely eliminate the pollution of diesel engines, and fully The rechargeable battery is driven by the combined energy of wind, lig...

AI Technical Summary

Problems solved by technology

[0003] 1. The energy efficiency is not high

[0004] The existing batteries have low efficiency, and the charge and discharge efficiency is not high. For example, the general energy efficiency of batteries is 55%-75%, and the efficiency of lead-acid batteries is the highest, only 75%-80%. less than 70%;

[0005] The efficiency of existing general AC and DC motors is not high enough, which is lower than that of permanent magnet motors, and the general electric ship control drive device does not recover braking energy, realize energy feedback, and perform recycling and reuse

For example, most battery-electric ships operating in closed waters use lead-acid batteries and cannot recover kinetic energy. This is the case for battery-electric ships in Hangzhou West Lake and Nanjing Qinhuai River, which can only work in short-distance closed waters;

[0006] The wind speed on general inland rivers is mostly 1-3 m / s. According to the test, in a certain city, the wind speed of 1-3 m / s reaches 300 days in a year, and the time of wind speed above 3 m / s reaches 150 days. The starting wind speed of the existing wind turbines is 3m / s, and the efficiency of wind power utilization is not high. Because the existing wind generators require high wind speeds for starting and working, and are generally used as synchronous generators, the traditional wind turbines that have been used on land generally The efficiency of wind turbines is low, resulting in low cost performance of wind turbines

[0007] 2. The light-receiving area of ​​the solar panel is too small

[0008] With the advancement of technology, the price of existing solar panels has dropped significantly, but due to the low efficiency of solar energy and the large requirement for light-receiving area, and the influence of the surface area of ​​the catamaran hull, the light-receiving area that can be installed with solar panels on ships is too small , and the performance of the control strategy is not good, and the utilization efficiency is low

[0009] Three, the battery has potential safety hazards

Therefore, the battery management system is very complicated and the cost is increased, which makes the battery electric ship in its infancy worse.

So that it is difficult to choose a battery, and cause users to wait and see nervously

[0011] 4. Most of the traditional battery electric ship solutions use lead-acid batteries and traditional brushed low-efficiency DC motors, but the above-mentioned patents are too principled and conceptual. What kind of chargers, wind turbines, steering control devices, and battery thermal management systems are used? , How to control is uncertain, lack of practicability, and lack of practical and feasible solutions for integrated photovoltaic battery electric ships

[0012] 5. At present, solar energy is unstable and inefficient, and the battery is low-energy, resulting in low endurance of battery-electric ships, low ship indicators and too much reliance on dock shore power, which is difficult to meet actual market demand

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