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Operation auxiliary device and control method for vehicle-mounted fuel cell

A technology of fuel cells and auxiliary devices, which is applied in the direction of fuel cells, power system fuel cells, and electrical devices, and can solve problems such as inability to provide electricity and sudden power of power batteries

Active Publication Date: 2021-12-21
BEIJING SINOHYTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention aims to provide an on-vehicle fuel cell operation auxiliary device and its control method to solve the problem that the power battery suddenly powers or cannot provide electricity when the fuel cell vehicle is in normal operation in the prior art

Method used

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  • Operation auxiliary device and control method for vehicle-mounted fuel cell
  • Operation auxiliary device and control method for vehicle-mounted fuel cell
  • Operation auxiliary device and control method for vehicle-mounted fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0071] An embodiment of the present invention discloses a vehicle-mounted fuel cell operation auxiliary device, such as figure 1 As shown, including DC-DC booster, bidirectional DC-DC converter, super capacitor, vehicle step-down DC converter, vehicle low-voltage power supply equipment, lithium battery and controller.

[0072] The power supply end of the fuel cell stack is respectively connected to the vehicle motor, the vehicle step-down DC converter, the input terminal of the lithium battery and one end of the bidirectional DC-DC converter through the DC-DC booster; the lithium battery is connected to the vehicle motor Parallel connection; the other end of the bidirectional DC-DC converter is connected to the supercapacitor; the output end of the vehicle step-down DC converter is connected to the vehicle low-voltage power supply equipment; the output end of the controller is respectively connected to the DC-DC booster and the bidirectional DC -DC converter, lithium battery, ...

Embodiment 2

[0083] Improvement on the basis of the method in Embodiment 1, the vehicle-mounted fuel cell operation auxiliary device also includes FC low-voltage power supply equipment. Preferably, the input end of the FC low-voltage power supply equipment is connected to the output end of the step-down DC converter of the vehicle, and its control end is connected to the output end of the controller.

[0084] The FC low-voltage power supply equipment is used as a power source to supply power to the fuel cell low-voltage system. For the FC low-voltage system, refer to the patent CN201920546237.8.

[0085] Preferably, the controller executes the following procedures:

[0086] S1. Obtain the current operating state of the vehicle motor; the current operating state includes normal operation, ready to stop, stop state, and ready to start;

[0087] S2. According to the current operating state of the above-mentioned vehicle motor, control the DC-DC booster, bidirectional DC-DC converter, vehicl...

Embodiment 3

[0123] The present invention also discloses a vehicle-mounted fuel cell operation auxiliary control method corresponding to the methods of Embodiments 1 and 2, which is characterized in that it includes the following steps:

[0124] S1. Obtain the running status of the vehicle motor in real time;

[0125] S2*. If it is in the normal running state, identify whether the parking command of the whole vehicle has been received; if not, control the fuel cell stack to supply power to the vehicle motor, and supply power to the supercapacitor, vehicle low-voltage power supply equipment, and FC low-voltage power supply equipment Charge separately; if received, shut down the vehicle;

[0126] S2**. If it is in the shutdown state, identify whether the start command of the whole vehicle has been received; if not, regularly detect the stack temperature, once the stack temperature exceeds the lower limit threshold, control the supercapacitor to heat and keep the fuel cell stack, And control...

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Abstract

The invention provides an operation auxiliary device for a vehicle-mounted fuel cell, which belongs to the technical field of fuel cell engines, and solves the problem in the prior art that a power battery suddenly loses power or cannot provide electricity when a fuel cell vehicle is in normal operation. The device includes a DC-DC booster, a bidirectional DC-DC converter, a supercapacitor, a vehicle step-down DC converter, a vehicle low-voltage power supply device, a lithium battery and a controller; wherein, the power supply terminal of the fuel cell stack is The DC-DC booster is respectively connected to the vehicle motor, the vehicle step-down DC converter, the input end of the lithium battery and one end of the bidirectional DC-DC converter; the lithium battery is connected in parallel with the vehicle motor; the bidirectional DC-DC converter The other end is connected to the super capacitor; the output end of the step-down DC converter of the vehicle is connected to the low-voltage power supply equipment of the vehicle; the output end of the controller is respectively connected to the DC‑DC booster, bidirectional DC‑DC converter, lithium battery, The vehicle step-down DC converter and the control terminal connection of the vehicle low-voltage power supply equipment. Realized fast low-temperature start-up and stable operation.

Description

technical field [0001] The invention relates to the technical field of fuel cell engines, in particular to a vehicle-mounted fuel cell operation auxiliary device and a control method thereof. Background technique [0002] Fuel cells have the advantages of no pollution to the environment and high energy conversion efficiency. Its most widely used scenarios are automobiles, and commercial operation in small batches has already begun. [0003] When the fuel cell is matched with the vehicle, it generally needs to be combined with the power battery (lithium battery) on the vehicle. When the fuel cell starts normally, it needs to be powered by the power battery. The power battery on the vehicle is also a low-voltage power supply module on the vehicle. Provide power. Therefore, the vehicle needs to ensure the normal and stable operation of the vehicle's power battery during normal operation. Once the vehicle's power battery fails, it will cause the vehicle to fail to operate norm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L50/70B60L50/40B60L3/00H01M8/04029H01M8/04223H01M8/04225H01M8/04228H01M8/04302H01M8/04303H01M8/0432H01M8/04537H01M8/04664H01M8/04858H01M8/04955
CPCB60L50/70B60L50/40B60L3/0046H01M8/04686H01M8/0488H01M8/04888H01M8/04302H01M8/04365H01M8/04589H01M8/04656H01M8/04955H01M8/04303H01M8/04225H01M8/04228H01M8/04268H01M8/04029H01M2250/20Y02T10/70Y02T90/40Y02E60/50Y02T10/72
Inventor 李文文方川张潇丹李飞强张国强
Owner BEIJING SINOHYTEC
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