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PDU relay adhesion detection circuit and method and automobile operation control method

A technology for detecting circuits and detection methods, applied in electric vehicles, circuit breaker testing, measuring current/voltage, etc., can solve problems such as system battery and electronic control damage, and achieve the effect of protecting the battery box with low possibility

Pending Publication Date: 2019-04-05
ZHUHAI GUANGTONG AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] PDU, also known as high-voltage distribution box, is the power distribution center of the high-voltage power system of electric vehicles. It mainly provides high voltage through the control relay. When the relay is stuck and there is no pre-charging circuit, the large current will cause damage to the system battery, electronic control, etc. damaged parts
Therefore, generally before the power is turned on to send a control signal to the pre-charging relay, the adhesion detection of the relay will be carried out, that is, the adhesion detection of the power-on, and the fault will be reported to the vehicle. However, this detection method has the following shortcomings: For example, the pre-charging road There is only one pre-charging relay. If the relay is stuck, when the battery box does not have a protective relay, even if the vehicle is powered off, the high voltage of the battery will discharge to the rear load through the pre-charging path.

Method used

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  • PDU relay adhesion detection circuit and method and automobile operation control method
  • PDU relay adhesion detection circuit and method and automobile operation control method

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 and figure 2 As shown, a PDU relay adhesion detection circuit in Embodiment 1 of the present invention includes a battery box, a main relay K5, a capacitor, a pre-charging resistor R, a first pre-charging relay K3 and a second pre-charging relay K4,

[0038] One end of the main relay K5 is electrically connected to the positive terminal of the battery box, and the other end of the main relay K5 is electrically connected to one end of the capacitor; the other end of the capacitor is electrically connected to the negative terminal of the battery box. extreme;

[0039] One end of the pre-charging resistor R is electrically connected to the common end of the battery box and the main relay K5, and the other end of the pre-charging resistor R is electrically connected to one end of the first pre-charging relay K3; The other end of the first pre-charging relay K3 is electrically connected to one end of the second pre-charging relay K4; the other end of the ...

Embodiment 2

[0042] Embodiment 2 of the present invention is a PDU relay adhesion detection circuit. On the basis of Embodiment 1, a first protection relay K1 is connected in series between the common end of the pre-charging resistor R and the main relay K5 and the battery box. .

Embodiment 3

[0043] Embodiment 3 of the present invention is a PDU relay adhesion detection circuit. On the basis of Embodiment 2, a second protection relay K2 is connected in series between the capacitor and the battery box.

[0044] By adding a dual-circuit protection relay, it can ensure that the back-end load has no high voltage after power failure and avoid component damage.

[0045] The power-on sequence of the first protection relay K1 and the second protection relay K2 is: after the low-voltage power-on, first detect the adhesion state of the relay, if the relay is not adhered and there is a high-voltage command, then control the first protection relay K1 and the second protection relay. The second protection relay K2 pulls in, and then waits for the pre-charging conditions to be met before starting pre-charging and powering up the load with high voltage; therefore, it needs to receive the relay status and request a high-voltage command before it can pull in the first protective rel...

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Abstract

The invention relates to a PDU relay adhesion detection circuit and method and an automobile operation control method. The PDU relay adhesion detection circuit includes a battery box, a main relay, acapacitor, a precharge resistor, a first precharge relay and a second precharge relay, one end of the main relay is electrically connected to the anode end of the battery box, and the other end of themain relay is electrically connected to one end of the capacitor; the other end of the capacitor is electrically connected to the cathode end of the battery box, one end of the precharge resistor iselectrically connected to the common end of the battery box and the main relay, and the other end of the precharge resistor is electrically connected to one end of the first precharge relay; and the other end of the first precharge relay is electrically connected to one end of the second precharge relay, and the other end of the second precharge relay is electrically connected to the common end ofthe main relay and the capacitor. According to the PDU relay adhesion detection circuit and method and the automobile operation control method, the two precharge relays are used for being prechargedin series, the probability of simultaneous adhesion of the two precharge relays is low, and the effect of protecting the battery box can be achieved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a PDU relay adhesion detection circuit, a detection method and a vehicle operation control method. Background technique [0002] PDU, also known as high-voltage distribution box, is the power distribution center of the high-voltage power system of electric vehicles. It mainly provides high voltage through the control relay. When the relay is stuck and there is no pre-charging circuit, the large current will cause damage to the system battery, electronic control, etc. Parts are damaged. Therefore, generally before the power is turned on to send a control signal to the pre-charging relay, the adhesion detection of the relay will be carried out, that is, the adhesion detection of the power-on, and the fault will be reported to the vehicle. However, this detection method has the following shortcomings: For example, the pre-charging road There is only one pre-charging relay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R19/165B60L3/00
CPCB60L3/0023B60L3/0046G01R19/16528G01R31/3278
Inventor 戴安康成玲赖信华赵建林
Owner ZHUHAI GUANGTONG AUTOMOBILE
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