High-pressure pre-charging loop and pre-charging control system for extended-range mine truck

Abstract

The utility model discloses a high-voltage pre-charging loop and pre-charging control system of an extended range mine truck, which comprises an engine, a generator FISG and a generator controller GCU which are connected in sequence, the generator controller GCU is connected in series with a power battery system, a motor controller MCU1 and a motor controller MCU2 which are connected in parallel, the motor controller MCU1 is connected with and drives a main drive motor TM1, and the main drive motor TM1 is connected with and drives a main drive motor TM2. The motor controller MCU2 is connected with and drives the main drive motor TM2; the power battery system pre-charges a capacitor C1 of the generator controller GCU, and the generator controller GCU reversely drags and drives an engine to start after the capacitor C1 is pre-charged. According to the utility model, the electrical safety problem of the high-voltage pre-charging loop of the extended-range mine truck is solved; and the motor controller pre-charging loop is provided with the fly-wheel diode, so that reverse current instantly generated when the pre-charging relay is switched off is prevented from flowing into the main circuit after pre-charging is completed, and safety and reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mine truck high pressure prefill, and specifically relates to a range extending mine truck high pressure prefill circuit and prefill control system. BACKGROUND

[0002] The existing range extending mine truck tonnage is getting larger and larger, needs to be configured with high -power electric drive system, generally has two groups of power up to 640kW main drive motor to drive, then needs to be matched with the power of motor controller also along with big, therefore the required bus capacitor in the controller is big, reaches 1400uF around, greatly increases the complexity of high voltage loop, and the electrical safety requirement is getting higher and higher.

[0003] Therefore, the electrical safety of the range extending mine truck high pressure prefill circuit is a problem to be solved at present. UTILITY MODEL CONTENTS

[0004] In order to solve the electrical safety problem of the range extending mine truck high pressure prefill circuit, the utility model aims at providing a range extending mine truck high pressure prefill circuit and prefill control system.

[0005] The utility model solves the above -mentioned problems through the following technical schemes:

[0006] Range extending mine truck high pressure prefill circuit and prefill control system, including engine, generator FISG and generator controller GCU connected in turn, generator controller GCU is connected with parallelly connected power battery system, motor controller MCU1 and motor controller MCU2 in series, motor controller MCU1 is connected drive main drive motor TM1, motor controller MCU2 is connected drive main drive motor TM2;The power battery system precharges the capacitor C1 of generator controller GCU, and through the generator controller GCU, the engine is started after the capacitor C1 precharge is completed.

[0007] As further improvement, the generator controller GCU, the motor controller MCU1 and the motor controller MCU2 are respectively provided with capacitor C1, capacitor C2 and capacitor C3 parallelly connected with each IGBT drive circuit.

[0008] As further improvement, the motor controller MCU1 and the motor controller MCU2 are the same structure.

[0009] As further improvement, the capacitor C2 and IGBT drive circuit of the motor controller MCU1 are connected in series with parallelly connected main positive relay K4 and precharge relay K3.

[0010] As a further improvement, the pre-charge relay K3 is connected with a freewheeling diode D1 and a pre-charge resistor R2 respectively, and the freewheeling diode D1, the pre-charge relay K3 and the pre-charge resistor R2 are connected in series and then connected in parallel with the main positive relay K4.

[0011] As a further improvement, the pre-charge relay K3 and the main positive relay K4 are closed respectively to pre-charge the capacitor C2 in the motor controller MCU1, and the capacitor C2 is pre-charged through the pre-charge relay K3 first.

[0012] As a further improvement, the power battery system comprises a power battery voltage Ua, a pre-charge relay K1 and a pre-charge resistor R1 connected in series, and the pre-charge relay K1 and the pre-charge resistor R1 are connected in series and then connected in parallel with the pre-charge relay K2.

[0013] As a further improvement, the pre-charge relay K1 or the main positive relay K2 is closed respectively to pre-charge the capacitor C1 in the generator controller GCU, and the capacitor C1 is pre-charged through the pre-charge relay K1 first.

[0014] As a further improvement, the power battery voltage Ua ranges from 480 to 750 VDC.

[0015] As a further improvement, the utility model also comprises a battery management system BMS connected with the power battery system, a range extending system control unit RCU connected with the generator controller GCU, a vehicle control unit VCU connected with the motor controller MCU1 and the motor controller MCU2, and the vehicle control unit VCU communicates with the battery management system BMS, the range extending system control unit RCU and the high-voltage power distribution module respectively.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] (1), the utility model solves the electrical safety problem of the range extending mine truck high-voltage pre-charge circuit,

[0018] (2), the utility model is applicable to methanol engine and fuel engine, and is widely practical,

[0019] (3), the motor controller pre-charge circuit of the utility model is equipped with a freewheeling diode, and after pre-charge is completed, the reverse current generated instantaneously when the pre-charge relay is disconnected is prevented from flowing into the main circuit, and it is safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the range extending mine truck high-voltage pre-charge circuit and pre-charge control system principle schematic diagram of the utility model,

[0021] Figure 2The utility model discloses a vehicle control unit VCU, battery management system BMS, range extending system control unit RCU and power distribution module information interaction schematic view. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the range protected by the utility model.

[0023] EMBODIMENT

[0024] Refer to the drawings Figures 1-2 A range extending type mine car high pressure pre-charging circuit and pre-charging control system, including engine, generator FISG and generator controller GCU connected in turn, generator controller GCU is connected with parallel connection power battery system, motor controller MCU1 and motor controller MCU2 in series, motor controller MCU1 connects drive main drive motor TM1, motor controller MCU2 connects drive main drive motor TM2. The power battery system pre-charges the capacitor C1 of generator controller GCU, and through the generator controller GCU, the engine is started by being driven in reverse after the capacitor C1 pre-charging is completed.

[0025] Specifically, the generator controller GCU includes a capacitor C1 and an IGBT drive circuit in parallel.

[0026] The motor controller MCU1 includes a capacitor C2 and an IGBT drive circuit in parallel, and a freewheeling diode D1, a pre-charging relay K3 and a pre-charging resistor R2 are connected in series before the capacitor C2 and the IGBT drive circuit are connected in parallel, and the main positive relay K4 is connected in parallel after the freewheeling diode D1, the pre-charging relay K3 and the pre-charging resistor R2 are connected in series.

[0027] The motor controller MCU2 includes a capacitor C3 and an IGBT drive circuit in parallel, and a freewheeling diode D2, a pre-charging relay K5 and a pre-charging resistor R3 are connected in series before the capacitor C3 and the IGBT drive circuit are connected in parallel, and the main positive relay K6 is connected in parallel after the freewheeling diode D2, the pre-charging relay K5 and the pre-charging resistor R3 are connected in series.

[0028] The power battery system includes a power battery voltage Ua, a pre-charging relay K1 and a pre-charging resistor R1 connected in series, and the pre-charging relay K1 and the pre-charging resistor R1 are connected in parallel with the pre-charging relay K2 after being connected in series.

[0029] When the whole vehicle needs to be powered on, the battery management system BMS controls the power battery system to pre-charge the capacitor C1 of the generator controller GCU, and when the voltage of the capacitor C1 reaches 98% Ua, the pre-charge is completed; the range extending system control unit RCU controls the generator controller GCU to increase the speed and drag the engine; after the engine is started, the vehicle controller VCU controls the second pre-charge of the capacitor C2 in the motor controller MCU1 and the capacitor C3 in the motor controller MCU2; after the second pre-charge is completed, according to the subsequent instructions of the vehicle controller VCU, the motor controller MCU1 drives the main drive motor TM1, the motor controller MCU2 drives the main drive motor TM2, and then the whole vehicle is driven, at this time the generator FISG generates power through the generator controller GCU to the power battery of the power battery system, forming a whole vehicle driving closed loop.

[0030] As Figure 1 , the high-voltage pre-charge circuit and pre-charge control system principle diagram of the range extended mine vehicle, including the engine, the generator FISG and the generator controller GCU connected in turn, the generator controller GCU is connected with the power battery system and the motor controller MCU1 and the motor controller MCU2, the motor controller MCU1 is connected to drive the main drive motor TM1, and the motor controller MCU2 is connected to drive the main drive motor TM2.

[0031] First, when the whole vehicle needs to be powered on, the battery management system BMS controls the power battery system to pre-charge the capacitor C1 of the generator controller GCU, at this time, the pre-charge relay K1 is closed, when the voltage of the capacitor C1 reaches 98% Ua, the main positive relay K2 is closed, the pre-charge relay K1 is disconnected, and the pre-charge is completed.

[0032] As preferred, the power battery voltage Ua ranges from 480 to 750 VDC.

[0033] As preferred, the positive electrode of the power battery is connected with the main positive relay K1 and the pre-charge relay K2, and the pre-charge relay K2 is connected in series with the pre-charge resistor R1.

[0034] Second, the range extending system control unit RCU controls the generator controller GCU to increase the speed and drag the engine, after the engine is started, the vehicle controller VCU controls the pre-charge of the capacitor C2 in the motor controller MCU1, at this time the pre-charge relay K3 is closed, when the voltage of the capacitor C2 reaches 98% Ua, the main positive relay K4 is closed, the pre-charge relay K3 is disconnected, and the pre-charge of this circuit is completed; at the same time, the vehicle controller VCU controls the pre-charge of the capacitor C3 in the motor controller MCU2, at this time the pre-charge relay K5 is closed, when the voltage of the capacitor C3 reaches 98% Ua, the main positive relay K6 is closed, the pre-charge relay K5 is disconnected, and the pre-charge of this circuit is completed.

[0035] As preferred, the engine can be a methanol engine or a fuel engine.

[0036] As preferred, the motor controller MCU1 pre-charge circuit is provided with a freewheeling diode D1 to prevent reverse current from flowing into the main circuit when the pre-charge relay is disconnected.

[0037] As preferred, the motor controller MCU2 pre-charge circuit is provided with a freewheeling diode D2 to prevent reverse current from flowing into the main circuit when the pre-charge relay is disconnected.

[0038] As preferred, the motor controller MCU1 positive terminal is connected with the main positive relay K4 and the pre-charge relay K3, and the pre-charge relay K3 is connected in series with the pre-charge resistor R2 and the freewheeling diode D1.

[0039] As preferred, the motor controller MCU2 positive terminal is connected with the main positive relay K6 and the pre-charge relay K5, and the pre-charge relay K5 is connected in series with the pre-charge resistor R3 and the freewheeling diode D2.

[0040] Step 3: According to the subsequent instructions of the vehicle controller VCU, the motor controller MCU1 drives the main drive motor TM1, and the motor controller MCU2 drives the main drive motor TM2, and then the vehicle is driven, at this time the main drive motor FISG generates electricity through the generator controller GCU to supplement the power battery, forming a closed loop of vehicle driving.

[0041] As preferred, the motor controller MCU1 is connected with the main drive motor TM1, and the motor controller MCU2 is connected with the main drive motor TM2.

[0042] As preferred, the motor controller MCU1 is connected with the main drive motor TM1, and the motor controller MCU2 is connected with the main drive motor TM2. Figure 2 As preferred, the motor controller MCU1 is connected with the main drive motor TM1, and the motor controller MCU2 is connected with the main drive motor TM2.

[0043] Although the present application has been described with reference to the explanatory embodiments thereof, the above-described embodiments are merely the preferred embodiments of the present application, and the embodiments of the present application are not limited to the above-described embodiments, and it should be understood that many other modifications and embodiments can be designed by those skilled in the art, and these modifications and embodiments will fall within the scope and spirit of the principles disclosed in the present application.

Claims

1. A high-voltage pre-charging circuit and pre-charging control system for a range-extended mining truck, characterized in that, The system includes an engine, a generator FISG, and a generator controller GCU connected in sequence. The generator controller GCU is connected in series with a power battery system, a motor controller MCU1, and a motor controller MCU2 connected in parallel. The motor controller MCU1 is connected to drive the main drive motor TM1, and the motor controller MCU2 is connected to drive the main drive motor TM2. The power battery system precharges the capacitor C1 of the generator controller GCU, and the generator controller GCU drives the engine to start after the capacitor C1 is precharged.

2. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 1, characterized in that, The generator controller GCU, the motor controller MCU1, and the motor controller MCU2 are each equipped with capacitors C1, C2, and C3 connected in parallel with each IGBT drive circuit.

3. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 2, characterized in that, The motor controller MCU1 and the motor controller MCU2 have the same structure.

4. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 3, characterized in that, Before the capacitor C2 of the motor controller MCU1 and the IGBT drive circuit are connected in parallel, there are main positive relay K4 and precharge relay K3 connected in series.

5. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 4, characterized in that, The precharge relay K3 is connected to a freewheeling diode D1 and a precharge resistor R2 on its left and right sides, respectively. The freewheeling diode D1, the precharge relay K3, and the precharge resistor R2 are connected in series and then connected in parallel to the main positive relay K4.

6. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 5, characterized in that, The pre-charge relay K3 and the main positive relay K4 are closed respectively to pre-charge the capacitor C2 in the motor controller MCU1, and the capacitor C2 is pre-charged first through the pre-charge relay K3.

7. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 1, characterized in that, The power battery system includes a power battery voltage Ua, a pre-charge relay K1, and a pre-charge resistor R1 connected in series. The pre-charge relay K1 and the pre-charge resistor R1 are connected in parallel with the pre-charge relay K2.

8. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 7, characterized in that, The pre-charge relay K1 or the main positive relay K2 is closed respectively to enable the power battery system to pre-charge the generator controller GCU capacitor C1, and the pre-charge of capacitor C1 is first performed through the pre-charge relay K1.

9. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to claim 7, characterized in that, The voltage Ua of the power battery is in the range of 480 to 750VDC.

10. The high-voltage pre-charging circuit and pre-charging control system for the range-extended mining truck according to any one of claims 1-9, characterized in that, Also includes: The battery management system (BMS) is connected to the power battery system, the range extender control unit (RCU) is connected to the generator controller (GCU), and the vehicle controller (VCU) is connected to the motor controller (MCU1) and the motor controller (MCU2). The vehicle controller (VCU) communicates with the battery management system (BMS), the range extender control unit (RCU), and the high-voltage power distribution module, respectively.

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