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Starting operation auxiliary device for vehicle-mounted fuel cell and control method

A technology for fuel cells and auxiliary devices, which is used in fuel cell additives, fuel cells, circuits, etc., and can solve problems such as limited low-temperature startup

Pending Publication Date: 2021-12-10
BEIJING SINOHYTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention aims to provide a vehicle-mounted fuel cell start-up auxiliary device to solve the problem of limited low-temperature start-up in the prior art

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] An embodiment of the present invention provides a start-up operation auxiliary device for a vehicle-mounted fuel cell, such as Figure 1~2 As shown, including DC-DC booster, bidirectional DC-DC converter, supercapacitor, lithium battery and controller.

[0076] The power supply end of the fuel cell stack is connected to the input end of the lithium battery through a DC-DC booster, and is connected to the supercapacitor through the DC-DC booster, bidirectional DC-DC converter in turn; the output end of the lithium battery is connected to the whole The vehicle motor is connected; the output terminal of the controller is respectively connected with the control terminals of the fuel cell stack, the DC-DC booster, the bidirectional DC-DC converter and the supercapacitor.

[0077] The DC-DC booster is used to increase the voltage platform output by the fuel cell stack to the rechargeable voltage platform of the lithium battery when the fuel cell stack is in normal operation. ...

Embodiment 2

[0084] Optimizing on the basis of Embodiment 1, the controller executes the following program:

[0085] S1. Obtain the current operating state of the vehicle motor and the real-time temperature of the fuel cell stack; the current operating state is one of normal operation, ready to stop, stop state, and ready to start;

[0086] S2. According to the real-time temperature of the fuel cell stack, combined with the current operating state of the vehicle motor, control the fuel cell stack, DC-DC booster, bidirectional DC-DC converter, and supercapacitor to perform corresponding operations, The fuel cell stack supplies power and the supercapacitor charges during normal operation, and the fuel cell stack fully charges the supercapacitor when it is ready to shut down. Supply power until the fuel cell stack cold start is completed.

[0087]Concretely, if the speed of the vehicle motor is not 0, identify whether to receive the parking command of the vehicle; if not received (step S21),...

Embodiment 3

[0121] The present invention also provides a low-temperature start-up control method for a vehicle-mounted fuel cell corresponding to the device described in Embodiment 1 or 2, comprising the following steps:

[0122] S1. Obtain the current running state of the vehicle motor;

[0123]S2*. If it is in the normal running state, identify whether the parking instruction of the whole vehicle has been received; if not (step S21), control the fuel cell stack to charge the supercapacitor through the DC-DC booster, and at the same time, charge the whole vehicle Motor power supply; if received (step S22), detect the residual power in the supercapacitor, if not full, charge the supercapacitor by DC-DC booster, bidirectional DC-DC converter, until after the electric quantity of supercapacitor is full, Shut down the vehicle;

[0124] S2**. If it is in the parking state, identify whether the start command of the whole vehicle has been received; if not received (step S23), regularly detect ...

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Abstract

The invention provides a starting operation auxiliary device for a vehicle-mounted fuel cell, which belongs to the technical field of fuel cell power supply, and solves the problem that low-temperature starting is limited in the prior art. The device comprises a DC-DC booster, a bidirectional DC-DC converter, a super capacitor, a lithium battery and a controller, wherein the power supply end of the fuel cell stack is connected with the input end of the lithium battery through the DC-DC booster, and is connected with the super capacitor through the DC-DC booster and the bidirectional DC-DC converter in sequence; the output end of the lithium battery is connected with a whole vehicle motor; and the output end of the controller is respectively connected with the control ends of the fuel cell stack, the DC-DC booster, the bidirectional DC-DC converter and the super capacitor. And the function of quick low-temperature starting is realized.

Description

technical field [0001] The invention relates to the technical field of fuel cell power supply, in particular to a start-up operation auxiliary device and a control method of a vehicle-mounted fuel cell. Background technique [0002] A hydrogen fuel cell is a device that converts the chemical energy in hydrogen fuel into electrical energy through an electrochemical reaction. The product is only water, and has the advantages of high efficiency, high reliability, low emissions, and no pollution. The application scenarios of hydrogen fuel cells are very extensive, among which matching with the whole vehicle is an important trend of future development. [0003] When matching with the whole vehicle, it is necessary to consider the working conditions of the whole vehicle. For example, when the vehicle is running in a low temperature environment, due to the limited performance of the power battery (lithium battery), it can only be discharged but not charged. When the whole vehicle ...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M8/04225H01M8/04302H01M8/0432H01M8/04701
CPCH01M8/04H01M8/04225H01M8/04302H01M8/0432H01M8/04701Y02E60/50
Inventor 方川李文文李飞强
Owner BEIJING SINOHYTEC
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