Hybrid power system

A hybrid power system and fuel cell technology, applied in electric vehicles, electrical components, transportation and packaging, etc., can solve the problems of energy conversion loss, DC transformer module specifications and weight, etc., to reduce weight and improve overall efficiency Effect

Pending Publication Date: 2019-06-07
卢丽芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the output power of fuel cells and batteries all passes through the DC transformer module, the size and weight of the DC transformer mo

Method used

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Effect test

Embodiment 1

[0061] Such as Figure 5 As shown, Embodiment 1 of the present invention discloses a hybrid power system, including a fuel cell, a storage battery, a fuel cell unidirectional conduction module, a battery unidirectional conduction module, and a unidirectional DC step-down module. The fuel cell unidirectional conduction module is connected to a load, the battery is connected to the load through the battery unidirectional conduction module, and the fuel cell output terminal is connected to the battery through the unidirectional DC step-down module. Among them, the fuel cell adopts an air-cooled proton exchange membrane fuel cell with a maximum output voltage of 40V and a minimum output voltage of 22V; the battery is a 6S, 25C, 5200mAh lithium polymer battery with a maximum voltage of 24V and a minimum voltage of 22V; a one-way DC step-down module The input voltage range is 26-42V, the input start voltage is U1 (28V), the input stop voltage is U2 (26V), the output voltage is U3 (2...

Embodiment 2

[0066] Such as Figure 6 As shown, Embodiment 2 of the present invention discloses a hybrid power system, including a fuel cell, a battery, a fuel cell unidirectional conduction module, a battery unidirectional conduction module, and a unidirectional DC step-down module. The fuel cell unidirectional conduction module is connected to the load, the battery is connected to the load through the battery unidirectional conduction module, and the output terminal of the fuel cell is sequentially passed through the fuel cell unidirectional conduction module and the unidirectional DC step-down A module is connected to the battery. Among them, the fuel cell adopts an air-cooled proton exchange membrane fuel cell with a maximum output voltage of 40V and a minimum output voltage of 22V; the battery is a 6S, 25C, 5200mAh lithium polymer battery with a maximum voltage of 24V and a minimum voltage of 22V; a one-way DC step-down module The input voltage range is 26-42V, the input start voltag...

Embodiment 3

[0071] Such as Figure 7 As shown, in Example 3 of the present invention, the fuel cell adopts an air-cooled proton exchange membrane fuel cell with the highest output voltage of 40V and the lowest output voltage of 22V; Battery; the input voltage range of the unidirectional DC step-down module is 26-42V, the input start voltage is U1 (28V), the input stop voltage is U2 (26V), the output voltage is U3 (24V), and the output current limit value is 5A; The current of each unidirectional conduction module is greater than 100A, and the conduction internal resistance is less than 1 mΩ; this embodiment 3 also adds a low-voltage protection module and a high-voltage protection module on the basis of embodiment 1, and the protection voltage of each low-voltage protection module is uniform. The protection voltage of the high voltage protection modules is 24V.

[0072] When the output voltage value of the fuel cell is higher than the input start-up voltage value U1 (28V) of the unidirect...

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Abstract

The invention discloses a hybrid power system which comprises a fuel cell, a storage battery, a fuel cell one-way conduction module, a storage battery one-way conduction module and a one-way direct current voltage reduction module. The output end of the fuel cell is connected to a load by the fuel cell one-way conduction module; the storage battery is connected to the load by the storage battery one-way conduction module; the input end of the one-way direct current voltage reduction module is connected with the input end or the output end of the fuel cell one-way conduction module; and the output end of the one-way direct current voltage reduction module is connected with the storage battery, wherein a relationship among an input starting voltage U1, an input shutdown voltage U2 and an output voltage U3 of the one-way direct current voltage reduction module is that: U1 is greater than or equal to U2 and U2 is greater than U3. In the hybrid power system disclosed by the invention, the one-way direct current voltage reduction module is adopted between the fuel cell and the storage battery, and the one-way direct current voltage reduction module only converts and transmit a small quantity of output power of the fuel cell to the storage battery, thereby reducing a specification, a weight, cost and power consumption of the one-way direct current voltage reduction module.

Description

technical field [0001] The invention relates to a new energy device, in particular to a hybrid power system. Background technique [0002] With the development of UAV technology, the demand for surveying and mapping, security, emergency, agriculture, forestry, inspection and other application fields is increasing day by day, and the demand for battery life is also increasing. The life time provided by the widely used lithium polymer battery is gradually approaching its limit. Generally, the life time of multi-rotor aircraft can reach about 1 hour, and the life time of fixed-wing aircraft can reach about 4 hours. Other alternative technologies are urgently needed. Longer battery life. [0003] The limit of battery life provided by the existing lithium polymer battery is determined by its mass-to-energy ratio. The existing lithium polymer battery material technology has gradually approached its physical limit, reaching 200-300Wh / kg. The energy storage material used in the ex...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/34
Inventor 卢丽芬
Owner 卢丽芬
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