Power on and off control method for dual energy source electric drive system
An electric drive system and electric control technology, applied in battery/fuel cell control devices, electric vehicles, electric devices, etc., to achieve the effect of improving life
Inactive Publication Date: 2020-06-02
JILIN UNIV
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Problems solved by technology
[0004] The present invention aims to solve the problem of power-on and power-on strategies for fuel cell vehicles driven by dual energy sources of fuel cells and power batteries, and proposes a power-on and power-on control method for dual-energy source electric drive systems
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[0022] The present invention will be further described below by accompanying drawing:
[0023] figure 1 The top-level state flow of the power-on and power-on coordination control of the dual-energy source electric drive system described in this method is given. The top-level state included in the power-on and power-on control method of the fuel cell vehicle includes the low-voltage power-on strategy, the driving process, and the fuel cell is the power battery charging process. , The high-voltage power-off strategy during the emergency shutdown process of the fuel cell and the emergency shutdown process of the power battery also includes the low-voltage power-off strategy. The high-voltage power-on and power-off strategy in the driving process refers to the control strategy for the main relay of the fuel cell and power battery during the process of starting, accelerating, stabilizing, and decelerating to stop. When the vehicle starts purely electric or the power demand of the ...
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The invention provides a power-on and power-off control method for a dual-energy source electric drive system. The control method comprises a top-level state which comprises a low-voltage power-on strategy, a high-voltage power-on and power-off strategy for a driving process and a parking process in which a fuel cell charges a power battery, and a high-voltage power-off strategy for a fuel cell emergency shutdown process and a power battery emergency shutdown process, and further comprises a low-voltage power-off strategy; the high-voltage power-on and power-off strategy for the driving process refers to the control strategy for the fuel cell and a power battery main relay in the processes of starting, accelerating, driving steadily and slowing down to stop of a vehicle; the high-voltage power-on and power-off strategy for the parking process in which the fuel cell charges the power battery refers to the control strategy for the fuel cell to the power battery main relay when parking; the high-voltage power-off strategy for the emergency shutdown processes refers to the control strategy for each main relay when the fuel cell or the battery fails or the jump times out.
Description
technical field [0001] The invention belongs to the technical field of power-on and power-off of electric vehicles, in particular to a method for coordinating power-on and power-off control of a dual energy source electric drive system with a fuel cell and a power battery. Background technique [0002] The development of fuel cell electric vehicles is an important way to solve the energy crisis and environmental pollution. Different from traditional vehicles and pure electric vehicles, fuel cell vehicles have high-voltage accessories such as power batteries, fuel cells, drive motors, and DCDC. In order to ensure the high voltage of fuel cell vehicles Functional safety and a reasonable high-voltage power-on and power-off strategy for the entire vehicle are of great significance to improving the service life of high-voltage components such as power batteries and fuel cells. [0003] Among the authorized patents on the control method of electric vehicles, the authorization numb...
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IPC IPC(8): B60L58/40B60L3/00B60L3/04
CPCB60L3/0023B60L3/04Y02T10/70
Inventor 宋大凤雷宗坤曾小华纪人桓王恺牛超凡王越李广含崔臣孙可华
Owner JILIN UNIV