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Insulation monitoring and control system, method and vehicle for fuel cell passenger vehicle

An insulation monitoring and fuel cell technology, which is used in battery/fuel cell control devices, electric vehicles, vehicle components, etc., can solve problems such as abnormal vehicle operation and different insulation monitoring standards, so as to reduce safety accidents and reduce accidents. Probability, the effect of ensuring safety

Active Publication Date: 2019-11-19
ZHONGTONG BUS HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present disclosure provides an insulation monitoring control system, method and vehicle for a fuel cell bus, which better solves the problems caused by the inconsistency of insulation monitoring standards for fuel cell vehicles using non-isolated boost DCDC. The problem of abnormal operation ensures that the operation of the vehicle is not affected when the insulation problem occurs on one side of the fuel cell, and it also ensures the safety of the insulation monitoring of the whole vehicle

Method used

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  • Insulation monitoring and control system, method and vehicle for fuel cell passenger vehicle
  • Insulation monitoring and control system, method and vehicle for fuel cell passenger vehicle
  • Insulation monitoring and control system, method and vehicle for fuel cell passenger vehicle

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Embodiment 1

[0049] Such as figure 1 As stated above, Embodiment 1 of the present disclosure provides an insulation monitoring and control system for a fuel cell bus, including a fuel cell module 1, an auxiliary power battery module 5, a non-isolated boost DCDC9, an insulation monitoring module (8, 10), a vehicle Load 7 and vehicle controller 6; the vehicle load 7 includes all the electrical parts of the vehicle, the auxiliary power battery 5 module is directly used for power supply of the vehicle load 7, and the non-isolated boost DCDC9 is used to The low-voltage platform electricity sent by the fuel cell module 1 is converted into a high-voltage platform electricity to supply power to the load 7 of the vehicle; the insulation monitoring module is used to continuously or indirectly monitor the insulation status of the system, and the insulation monitoring module includes a first insulation monitoring module 10 and the second insulation monitoring module 8, the first insulation monitoring ...

Embodiment 2

[0058] Such as figure 2 As shown, Embodiment 2 of the present disclosure provides a high-voltage electrical insulation monitoring and control method, using the insulation monitoring and control system for fuel cell buses described in Embodiment 1, the steps are as follows:

[0059] Close the second high-voltage switch (K2) and the fourth high-voltage switch (K4), then perform power-on control on the third pre-charging module 7, and then power-on control on the first pre-charging module 2;

[0060] The first insulation monitoring module 10 controls the first two-way switch (K5) to close, and the first insulation monitoring module 10 starts to perform insulation monitoring;

[0061] If the insulation monitoring of the first insulation monitoring module 10 is abnormal and is lower than the allowable lower limit of the vehicle, the vehicle controller will give an alarm and prohibit driving.

[0062] If the insulation monitoring of the first insulation monitoring module 10 is nor...

Embodiment 3

[0067] Such as image 3 As shown, Embodiment 3 of the present disclosure provides a method for controlling abnormality of insulation monitoring during operation, using the insulation monitoring and control system for fuel cell buses described in Embodiment 1, the steps are as follows:

[0068] If the insulation monitoring of the second insulation monitoring module 8 continues to be abnormal, the vehicle controller 6 sends a standby command to the fuel cell module;

[0069] After the fuel cell module 1 is on standby, the vehicle controller 6 controls the second high-voltage switch (K2) and the fourth high-voltage switch (K4) to be disconnected, and closes the first two-way switch (K5), and the first insulation monitoring module 10 intervenes in insulation monitoring Work;

[0070] If the insulation monitoring of the second insulation monitoring module 8 is still abnormal, the vehicle controller 6 limits the power output to zero, disconnects the third high-voltage switch (K3), ...

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Abstract

The disclosure provides an insulation monitoring control system, method and vehicle for a fuel cell bus, including a fuel cell module, an auxiliary power battery module, a non-isolated boost DCDC, an insulation monitoring module, a vehicle load and a controller; the auxiliary power The battery module is directly used for the power supply of the vehicle load, and the non-isolated step-up DCDC is used to convert the low-voltage platform power generated by the fuel cell module into a high-voltage platform power to supply power to the vehicle load; the insulation monitoring module includes a first insulation A monitoring module and a second insulation monitoring module, the first insulation monitoring module is used for insulation monitoring of the non-isolated boost DCDC input front-end circuit, and the second insulation monitoring module is used for insulation monitoring of the non-isolated boost DCDC output back-end circuit; The controller is used for data communication with each module; it solves the problem of abnormal operation of the vehicle caused by the inconsistency of the insulation monitoring standards of the fuel cell vehicle adopting non-isolated step-up DCDC.

Description

technical field [0001] The disclosure relates to the field of design and manufacture of fuel electric passenger cars, in particular to an insulation monitoring and control system, method and vehicle for fuel cell passenger cars. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] At present, fuel cell buses are mainly hybrid types equipped with fuel cells and auxiliary power batteries as electric energy sources. The output voltage of fuel cell modules is generally about 200V, and the voltage platform is relatively low. It is necessary to increase the voltage to match the auxiliary power by boosting DCDC. The same voltage platform of the battery drives the vehicle together. Boost DCDC generally adopts BOOST circuit structure, which is divided into isolated type and non-isolated type. Due to the large size, low efficiency, and high cost of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/30B60L3/04
CPCB60L3/04B60L58/30Y02T10/72Y02T90/40
Inventor 囤金军刘涛王波宋金香徐彪陈波
Owner ZHONGTONG BUS HLDG
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