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Seven-in-one high-voltage integrated system circuit structure of electric vehicle and working method thereof

A high-voltage integration, electric vehicle technology, applied in circuits or fluid pipelines, control/regulation systems, electrical components, etc., can solve the problems of low efficiency, large volume, and low integration degree

Active Publication Date: 2021-07-06
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the high-voltage integrated systems launched by domestic and foreign mainstream manufacturers are mostly "three-in-one" or "four-in-one". Large-scale promotion and application in electric vehicles

Method used

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  • Seven-in-one high-voltage integrated system circuit structure of electric vehicle and working method thereof
  • Seven-in-one high-voltage integrated system circuit structure of electric vehicle and working method thereof
  • Seven-in-one high-voltage integrated system circuit structure of electric vehicle and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Such as figure 2 and image 3 As shown, this embodiment provides the circuit structure changes and power transfer forms of the three-phase fast charger and the single-phase slow charger in the charging mode.

[0061] When detecting the insertion of the charging gun, the system selects the charging mode, the switches S1, S2, and S3 are connected to the power grid, and the preset sensor of the charging port detects the type of input electric energy. When La, Lb, and Lc are input, that is, three-phase AC power is input, the system automatically selects the three-phase fast charging mode, closes S4, and opens the third bridge arm switch circuit. , and send it to the DC / DC circuit after direct conversion; when Ld is input, that is, single-phase AC power is input, the system automatically selects the single-phase slow charging mode, disconnects S4, and closes the third bridge arm switch circuit. The previous circuit is single-phase four Switch APFC, improve power factor an...

Embodiment 2

[0063] Such as Figure 4 As shown, this embodiment provides the change of circuit structure and the form of power transmission when the power battery does external work in the driving mode, provides high-voltage alternating current for the motor controller, and supplies power for the battery and the low-voltage system of the vehicle.

[0064] When the plug-in of the charging plug is not detected, the system selects the driving mode, switches S1, S2, and S3 connect the motor and the external port, S5, S6, and S7 connect the motor, and S4 is closed. The power battery works on the motor and the whole vehicle system. IGBT tubes Q11, Q12, Q13, Q14, inductance Lr2, capacitors Cr2, C9, C10, C11, C12 and transformer N2 winding form an LLC resonant circuit as a DC / DC front stage. The phase transformer transfers the electrical energy to the dual subsequent stage. IGBT tubes Q7, Q8, Q9, Q10, inductance Lr1, capacitors Cr1, C1, C2, C3, C4 and transformer N1 winding form a DC / DC high-powe...

Embodiment 3

[0066] Such as Figure 5 and Figure 6 As shown, this embodiment provides the circuit structure changes and power transfer forms of the three-phase power inverter and the single-phase power inverter in the inverter mode.

[0067]After the driver manually selects the power supply external feeding mode, the system starts the inverter, S1, S2, S3 are connected to the motor and external ports, S5, S6, S7 are connected to the external world, and the power battery works on the external world. IGBT tubes Q11, Q12, Q13, Q14, inductance Lr2, capacitors Cr2, C9, C10, C11, C12 and transformer N2 winding form an LLC resonant circuit as a DC / DC front stage, and the power is transferred to the dual rear stages through a three-phase transformer. IGBT tubes Q7, Q8, Q9, Q10, inductance Lr1, capacitors Cr1, C1, C2, C3, C4 and transformer N1 winding form a DC / DC high-power rear stage, which adjusts the voltage of the input power and converts it into AC and DC. When in the state of a three-phas...

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Abstract

The invention discloses a seven-in-one high-voltage integrated system circuit structure of an electric vehicle and a working method thereof. An integral circuit is simplified through multiplexing of components in different modes. A motor controller, a single-phase low-speed charger, a three-phase high-speed charger, a single-phase power supply inverter, a three-phase power supply inverter, a high-power bidirectional DC / DC circuit and a low-power bidirectional DC / DC circuit are integrated. The integrated circuit realizes the function full coverage of a plurality of original circuits, the number of power switch tubes and various energy storage components is greatly reduced, and the manufacturing cost of the electric automobile is greatly reduced; meanwhile, one integrated circuit is used for replacing a plurality of original circuits, so that the mass or the size is reduced, the light weight of the electric automobile is favorably realized, and the internal space utilization rate of the electric automobile is improved; in addition, a three-phase transformer is used for completing multi-direction energy flow, one transformer is reduced compared with that before integration, meanwhile, part of inductive elements are reused, EMI sources of the whole system are reduced, and the EMI processing scheme of the system is simplified.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle seven-in-one high-voltage integrated system circuit structure and a working method thereof. Background technique [0002] Under the alarm bell of the era of energy crisis and intensified environmental pollution, due to the problems of high fuel consumption and high emissions of traditional fuel vehicles, some countries have proposed a ban on the sale of fuel vehicles one after another. New energy vehicles are expected to replace fuel vehicles and become the mainstream means of transportation in the future. Among energy vehicles, pure electric vehicles have the lowest emission and the highest energy density. In the past pure electric vehicles, the circuit structure is huge, which leads to the redundancy of each system in the vehicle. There are two main ways for each circuit to exist. One is completely separated and arranged separately as an independen...

Claims

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Application Information

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IPC IPC(8): B60R16/023H02M7/797H02M3/335H02M1/088
CPCB60R16/0231H02M7/797H02M3/33584H02M1/088Y02T10/70
Inventor 张庭森彭忆强黄晓蓉赵玉友
Owner XIHUA UNIV