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Power Systems

A technology of power supply system and power supply, which is applied in the field of power supply system, can solve problems such as voltage reduction of smoothing capacitors, achieve the effect of reducing the number of parts and suppressing the increase in cost

Active Publication Date: 2022-08-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a fault detection device, if the contactor is turned off while the smoothing capacitor included in the load is being charged by the power supply, the electric charge charged in the smoothing capacitor is charged into the accumulator for auxiliary machinery, so that the smoothing capacitor The voltage is gradually reduced

Method used

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no. 1 approach ＞

[0083] In the following, on the one hand, refer to the appendix Figure 1 A first embodiment of the present invention will be described in terms of this aspect.

[0084] figure 1 It is a figure which shows the structure of the power supply system 1 of this embodiment. The power supply system 1 is mounted on a vehicle body B of an electric vehicle such as a battery-driven vehicle, a hybrid vehicle, and a fuel cell vehicle.

[0085] The power supply system 1 includes a non-grounded circuit 2 , a state detection circuit 3 that is connected to the non-grounded circuit 2 and generates various signals according to the state of the non-grounded circuit 2 , and controls the non-grounded circuit 2 and the state detection circuit 3 . Electronic control unit 6 (hereinafter, abbreviated as "ECU 6").

[0086] The non-grounded circuit 2 includes a power source 21 for generating high voltage direct current, a vehicle load 22 , a positive high-voltage power line 23 p connecting the positiv...

no. 2 approach ＞

[0159] Next, on the one hand, refer to the appendix Figure 1 A second embodiment of the present invention will be described in terms of this aspect.

[0160] Figure 11 It is a figure which shows the structure of 1 A of power supply systems of this embodiment. In the above-described first embodiment, the case where one power source 21 is connected to the vehicle load 22 has been described. On the other hand, the power supply system 1A of the present embodiment includes a plurality of ( Figure 11 The aspect of the power supply is different from the power supply system 1 of the first embodiment. In addition, in the following description, the same code|symbol is attached|subjected to the same structure as the power supply system 1 of 1st Embodiment, and the description is abbreviate|omitted.

[0161] The power supply system 1A includes a non-ground circuit 2A, a state detection circuit 3A, and an ECU 6A.

[0162] The non-grounded circuit 2A includes: a first power source 2...

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Abstract

The invention provides a power supply system that can quickly determine whether a contactor of a non-grounded circuit is faulty. The power supply system (1) comprises: a non-grounded circuit (2), including a power supply (21), a load (22), power lines (23p), (23n) and a high-voltage blocking machine (24); a signal application circuit (31), connected to In the power lines (23p) and (23n), the high-voltage blocking machine (24) is closer to the input connection parts (25p) and (25n) of the vehicle load (22) side; the signal input circuit (41) and the ground fault detection circuit ( 46), connected to the output connection parts (26p) and (26n) of the higher voltage blocking machine (24) on the side of the power supply (21) in the power lines (23p) and (23n), and generated according to the output connection parts (26p), (26n) The signal fluctuates according to the voltage of the ground fault determination unit (63), in the state of controlling the high voltage blocking machine (24) to the connected state, based on the signal generated by the ground fault detection circuit (46) to determine the presence of There is no ground fault; and a fusion welding determination unit (64) determines whether the high voltage blocking machine (24) has fusion welding according to the signal generated by the ground fault detection circuit (46).

Description

technical field [0001] The present invention relates to a power supply system. More specifically, the present invention relates to a power supply system for an electric vehicle including a non-grounded circuit having a DC power source, a load, positive and negative wires, and a positive blocking switch and a negative blocking switch. Background technique [0002] In recent years, the development of electric vehicles such as electric conveying equipment including an electric motor as a power generation source, or a hybrid vehicle including an electric motor and an internal combustion engine as power generation sources has flourished. A power source such as a high-voltage battery, a capacitor, and a fuel cell stack is mounted on the vehicle body of such an electric vehicle in order to supply electric power to the electric motor. In addition, a power supply circuit that connects such a power supply to a load such as an electric motor is usually mounted on the vehicle body in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00
CPCB60L3/00
Inventor 山口和彦
Owner HONDA MOTOR CO LTD
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