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High-low edge drive output circuit of finished automobile controller of pure electric automobile

A vehicle controller, pure electric vehicle technology, applied in the direction of circuit devices, circuits or fluid pipelines, emergency protection circuit devices, etc., can solve the problem of affecting the safety of the vehicle, regardless of the fault feedback of the vehicle controller, fault diagnosis control The protection of the output of the device, the reduction of the cost of the hardware circuit of the vehicle controller, etc., to achieve the effect of improving the safety of the vehicle, saving space, and convenient operation

Pending Publication Date: 2018-11-16
湖北东润汽车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's vehicle controller technology started relatively late, and some domestic component manufacturers seriously reduced the hardware circuit cost of the vehicle controller based on cost considerations, without considering the fault feedback, fault diagnosis, and protection of the controller's output. The handling of controller failure strategies, etc., will inevitably affect the safety of the whole vehicle

Method used

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  • High-low edge drive output circuit of finished automobile controller of pure electric automobile
  • High-low edge drive output circuit of finished automobile controller of pure electric automobile
  • High-low edge drive output circuit of finished automobile controller of pure electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 2 Shown is the circuit schematic of the high-side drive circuit, as image 3 The high-side output MOSFET circuit is shown, in which the MCU control unit controls the Gx (G1, G2, G3, G4) of the high-side drive circuit to turn on and off a total of 4 gate drive channels through the SPI1 bus, and Gx drives the high-side output MOSFET circuit respectively The IPG20N06S2L35 has a total of 4 MOSFET field effect transistors, which can be connected with inductive and resistive loads as high-side outputs. When the high-side drive circuit detects any fault, it can output to the MCU control unit through an 8-bit Output Fault serial port register connected to the FAULTZ pin of the high-side drive circuit, telling the MCU control unit that there is a fault in the high-side drive output module. Specific faults are divided into system faults and load faults. System faults include: VDD logic power supply undervoltage, VCP charge pump power supply undervoltage, system the...

Embodiment 2

[0021] like Figure 4 Shown is the circuit diagram of the bottom-side drive output module; the MCU control unit controls the 8 low-side output channels in the bottom-side drive output module circuit through the SPI2 bus. Each low-side output channel of the bottom-side drive output module circuit is connected in series with an anti-reverse diode and a freewheeling diode to reduce damage to the bottom-side drive output module circuit due to an external load failure. The bottom edge drive output module circuit has an output voltage clamping function, which can absorb the flyback current of the inductive load. The bottom edge drive output module circuit can diagnose and identify two output fault conditions: (1) overcurrent of OUT1 to OUT6 channels, overcurrent and thermal overload of OUT7 and OUT8 in switching state; (2) open load of all outputs in switching state or short to GND. All output states of the bottom edge driver output module circuit can be read out through the seria...

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PUM

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Abstract

The invention discloses a high-low edge drive output circuit of a finished automobile controller of a pure electric automobile. The high-low edge drive output circuit of the finished automobile controller of the pure electric automobile comprises a high-low edge drive output module, an MCU control unit and a CAN drive module, wherein the MCU control unit and the CAN drive module are connected withthe high-low edge drive output module, the high-low edge drive output module comprises a high edge drive output module and a low edge drive output module, the high edge drive output module comprisesa high edge drive circuit and a high edge output MOSFET circuit, the MCU control unit is connected with the high edge drive circuit through an SPI1 bus, and the MCU control unit is connected with thelow edge drive output module through an SPI2 bus. The high-low edge drive output circuit of the finished automobile controller of the pure electric automobile has the advantages that the structure issimple, the operation is convenient, by changing the high-low edge drive output circuit into an intelligent power IC circuit driven by the bus, the high-low edge drive output module has a diagnostic function, the number of circuit board chips is greatly reduced, the area of a circuit board is reduced, the cost is reduced, the safety of a finished automobile is improved, and the high-low edge driveoutput circuit cooperates with a finished automobile control application control strategy to achieve fault prognosis, fault diagnosis and accurate fault location.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a high and low side drive output circuit for a vehicle controller of a pure electric vehicle. Background technique [0002] As the core component of pure electric vehicles, the vehicle controller plays a key role in vehicle drive, energy management, network management, fault diagnosis, and vehicle safety. Pure electric vehicle controller technology has been paid more and more attention in China. The safety design of the vehicle controller includes the safety of hardware circuits in addition to the safety of software strategies. my country's vehicle controller technology started relatively late, and some domestic component manufacturers seriously reduced the hardware circuit cost of the vehicle controller based on cost considerations, without considering the fault feedback, fault diagnosis, and protection of the controller's output. The handling of controller failure strategie...

Claims

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Application Information

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IPC IPC(8): B60R16/02H02H3/10H02H5/04
CPCH02H3/10H02H5/04B60R16/02
Inventor 王冰辉
Owner 湖北东润汽车有限公司
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