A vehicle body controller system and vehicle

Abstract

The utility model relates to the field of automobile control electronic technology provides a kind of vehicle body controller system and vehicle, vehicle body controller system includes power module, first system circuit and second system circuit;Power module includes DC-DC power conversion module and linear voltage stabilizer LDO power conversion module, DC-DC power conversion module is electrically connected with first system circuit, linear voltage stabilizer LDO power conversion module is electrically connected with second system circuit;DC-DC power conversion module is used to convert power supply to first system circuit, linear voltage stabilizer LDO power conversion module is used to convert power supply to second system circuit, first system circuit is used to drive wiper motor.The utility model avoids that the voltage fluctuation and noise interference generated in the process of starting and stopping of wiper motor are conducted to other load circuit, to improve the accuracy of system other load feedback signal acquisition and the stability of system overall operation.

Description

Technical Field

[0001] This utility model relates to the field of automotive control electronics technology, and in particular to a body controller system and vehicle. Background Technology

[0002] With the rapid development of automotive technology, vehicle body controllers are integrating more and more functions, and common driven loads include wiper motors, turn signals, position lights, and daytime running lights. Currently, with the increasing integration of functions in vehicle body controllers, the types of loads that need to be driven by the body controller are also gradually increasing. The simultaneous presence of various types of loads presents a significant challenge to the stable acquisition of signals from these loads. For example, the operation of a wiper motor has a significant impact on the system power supply voltage, leading to large signal deviations when acquiring feedback signals from loads such as lights.

[0003] Chinese patent CN218213837U discloses a domain controller development device and vehicle. This device employs a centralized power supply structure, providing unified power to the domain controller and motor drive module through a series connection of a power supply module, a reverse connection protection module, and a step-down module. The domain controller communicates with the motor drive module via an SPI bus interface, distinguishing and controlling different auxiliary motors (such as wiper motors and windshield motors) using address information. An analog-to-digital converter module is also configured to collect feedback signals from various loads. However, this technical solution uses a unified power ground design and lacks a dedicated power isolation structure for different load characteristics. When high-power inductive loads such as wiper motors start or stop, significant voltage fluctuations and noise interference are generated on the shared power ground. These interference signals are transmitted to other load circuits through the shared power ground, severely affecting the accuracy of feedback current acquisition for lighting loads, leading to a decrease in the accuracy and reliability of system control. Utility Model Content

[0004] In view of this, this utility model proposes a vehicle body controller system and vehicle to solve the problem that the existing technology adopts a unified power ground design and lacks a dedicated power isolation structure for different load characteristics. When high-power inductive loads such as wiper motors start or stop, large voltage fluctuations and noise interference will be generated on the shared power ground. These interference signals are conducted to other load circuits through the shared power ground, which seriously affects the accuracy of feedback current acquisition of lighting loads and leads to a decrease in the accuracy and reliability of system control.

[0005] The technical solution of this utility model is implemented as follows: On the one hand, this utility model provides a vehicle body controller system, which includes a power supply module, a first system circuit and a second system circuit;

[0006] The power module includes a DC-DC power conversion module and a linear regulator (LDO) power conversion module. The DC-DC power conversion module is electrically connected to the first system circuit, and the linear regulator (LDO) power conversion module is electrically connected to the second system circuit.

[0007] The DC-DC power conversion module is used to convert power to the first system circuit, and the linear regulator (LDO) power conversion module is used to convert power to the second system circuit. The first system circuit is used to drive the wiper motor.

[0008] Based on the above technical solutions, preferably, the first system circuit includes a first microcontroller, a first drive circuit, and a motor load, wherein the first drive circuit is electrically connected to the first microcontroller and the motor load respectively.

[0009] Based on the above technical solutions, preferably, the second system circuit includes a second microcontroller, a second drive circuit, and other loads, wherein the second drive circuit is electrically connected to the second microcontroller and other loads respectively.

[0010] Based on the above technical solutions, preferably, the power ground of the first system circuit is connected to the GND1 terminal, and the power ground of the second system circuit is connected to the GND2 terminal.

[0011] Based on the above technical solutions, preferably, power ground GND1 and power ground GND2 are isolated and connected together by a single line in the system circuit.

[0012] Based on the above technical solutions, preferably, the DC-DC power conversion module includes a DC-DC power conversion unit, a resistor network, a filter unit, and an output inductor;

[0013] The DC-DC power conversion unit is electrically connected to the resistor network, the filter unit, and the output inductor to form a power conversion circuit. The DC-DC power conversion unit is used to receive the input voltage and output the converted voltage through the output inductor.

[0014] Based on the above technical solutions, preferably, the linear regulator LDO power conversion module includes an LDO power conversion unit and a filter capacitor network;

[0015] The LDO power conversion unit is electrically connected to the filter capacitor network, and the LDO power conversion unit is used to receive input voltage and output voltage.

[0016] Based on the above technical solutions, preferably, the first system circuit includes a first microcontroller, a switch driving unit, and a motor driving unit;

[0017] The first microcontroller is electrically connected to the switch drive unit, and the switch drive unit is electrically connected to the motor drive unit. The first microcontroller is used to output control signals to the switch drive unit to control the motor drive unit to drive the wiper motor to rotate forward or backward.

[0018] Based on the above technical solutions, preferably, the second system circuit includes a second microcontroller, a current detection unit, and a load drive unit;

[0019] The second microcontroller is electrically connected to the load driving unit, and the current detection unit is electrically connected to the second microcontroller and the load driving unit. The second microcontroller is used to output control signals to the load driving unit to drive the load, and to receive the status signal of the load current through the current detection unit.

[0020] On the other hand, the present invention also provides a vehicle including any of the above-described body control systems.

[0021] The vehicle body controller system provided by this utility model has the following advantages compared with the prior art:

[0022] (1) By adopting a dual power supply isolation design with a DC-DC power conversion module dedicated to powering the first system circuit that drives the wiper motor and a linear regulator LDO power conversion module dedicated to powering the second system circuit, the voltage fluctuations and noise interference generated by the wiper motor during start-up and shutdown are prevented from being transmitted to other load circuits, thereby improving the accuracy of the system's other load feedback signal acquisition and the overall stability of the system operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a system block diagram of a vehicle body controller system according to the present invention;

[0025] Figure 2 This is a power ground system connection block diagram of a vehicle body controller system according to the present invention;

[0026] Figure 3 This is a circuit wiring diagram of a DC-DC power conversion module for a vehicle body controller system according to this utility model.

[0027] Figure 4This is a circuit wiring diagram of an LDO power conversion module for a vehicle body controller system according to the present invention.

[0028] Figure 5 This is an external system block diagram of the power supply module of a vehicle body controller system according to the present invention;

[0029] Figure 6 This is a circuit wiring diagram of the first system circuit of a vehicle body controller system according to the present invention;

[0030] Figure 7 This is a circuit wiring diagram of the second system circuit of a vehicle body controller system according to the present invention;

[0031] Figure 8 This is a schematic diagram showing the common ground connection of the first system circuit and the second system circuit of a vehicle body controller system according to this utility model. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] Please see Figure 1 The present invention provides a vehicle body controller system, which includes a power supply module, a first system circuit and a second system circuit;

[0034] The power module includes a DC-DC power conversion module and a linear regulator (LDO) power conversion module. The DC-DC power conversion module is electrically connected to the first system circuit, and the linear regulator (LDO) power conversion module is electrically connected to the second system circuit.

[0035] The DC-DC power conversion module is used to convert power to the first system circuit, and the linear regulator (LDO) power conversion module is used to convert power to the second system circuit. The first system circuit is used to drive the wiper motor.

[0036] The first system circuit includes a first microcontroller, a first drive circuit, and a motor load, wherein the first drive circuit is electrically connected to the first microcontroller and the motor load.

[0037] The second system circuit includes a second microcontroller, a second drive circuit, and other loads, wherein the second drive circuit is electrically connected to the second microcontroller and the other loads respectively.

[0038] Specifically, this embodiment employs a dual-power isolation design, using a DC-DC power conversion module specifically for powering the first system circuit driving the wiper motor, and an LDO power conversion module specifically for powering the second system circuit. This avoids voltage fluctuations and noise interference generated by the wiper motor during start-up and shutdown being transmitted to other load circuits, thereby improving the accuracy of the system's feedback signal acquisition from other loads and the overall stability of the system operation.

[0039] Please see Figure 2 The power ground of the first system circuit is connected to the GND1 terminal, and the power ground of the second system circuit is connected to the GND2 terminal.

[0040] Power ground GND1 and power ground GND2 are isolated in the system circuit and connected together by a single wire.

[0041] Please see Figure 3 The DC-DC power conversion module includes a DC-DC power conversion chip U1, resistors R1-R2, capacitors C1-C2, and inductor L1;

[0042] The DC-DC power converter chip U1 is electrically connected to one end of capacitor C1, one end of resistor R2, one end of resistor R1, and one end of inductor L1. The other end of capacitor C1 is electrically connected to GND1, the other end of resistor R2 is electrically connected to GND1, the other end of resistor R1 is electrically connected to one end of capacitor C2, and the other end of capacitor C2 is electrically connected to GND1. The DC-DC power converter chip U1 receives Vin1 voltage and outputs Vout1 voltage from the other end of inductor L1.

[0043] Specifically, the output voltage is adjusted by adjusting the ratio of resistors R1 and R2; its output voltage Vout1 serves as the input power supply for the first system circuit, and also as the input power supply for the linear regulator LDO power conversion module.

[0044] Please see Figure 4 The linear regulator LDO power conversion module includes an LDO power conversion chip U2 and capacitors C3-C4, and its output voltage Vout2 serves as the input power for the second system circuit.

[0045] The LDO power converter chip U2 is electrically connected to one end of capacitor C3 and one end of capacitor C4 respectively. The other end of capacitor C3 is electrically connected to GND2, and the other end of capacitor C4 is electrically connected to GND2. The LDO power converter chip U2 inputs voltage Vout1 and outputs voltage Vout2.

[0046] Figure 5The power module is used to provide two output voltages to power the first system circuit and the second system circuit respectively. It should be noted that the power grounds that power system circuit 1 and system circuit 2 respectively should be isolated to avoid interference signals from crosstalking through the power ground.

[0047] in addition, Figure 5 Integrated in the power module Figure 3 The DC-DC power converter has its output voltages Vout1 and GND1 connected to the first system circuit, respectively; meanwhile, the power module integrates... Figure 4 The linear regulator LDO power converter has its output voltages Vout2 and GND2 connected to the second system circuit, respectively.

[0048] Please see Figure 6 The first system circuit includes a first microcontroller U3, resistors R4-R6, diodes D1-D2, transistors Q1-Q2, relays K1-K2, and a wiper motor M1;

[0049] The first microcontroller U3 is electrically connected to one end of resistor R4 and one end of resistor R6. The other end of resistor R4 is electrically connected to the base of transistor Q1. The collector of transistor Q1 is electrically connected to the anode of diode D1 and relay K1. The cathode of diode D1 is connected to +12V. The emitter of transistor Q1 is electrically connected to GND1. Relay K1 is electrically connected to one end of wiper motor M1. The other end of wiper motor M1 is electrically connected to relay K2. Relay K1 and relay K2 are both connected to GND1. The other end of resistor R6 is electrically connected to the base of transistor Q2. The emitter of transistor Q2 is connected to GND1. The collector of transistor Q2 is electrically connected to the anode of diode D2 and relay K2. The cathode of diode D2 is connected to +12V.

[0050] Specifically, the first microcontroller U3 outputs high and low levels to drive transistors Q1 and Q2 to turn on and off, respectively. When transistor Q1 is on and transistor Q2 is off, the coil of relay K1 is energized, and +12V power is connected to the upper end of wiper motor M1 through relay K1, and then to GND1 through relay K2, causing wiper motor M1 to rotate forward. When transistor Q1 is off and transistor Q2 is on, the coil of relay K2 is energized, and +12V power is connected to the lower end of wiper motor M1 through relay K2, and then to GND1 through relay K1, causing wiper motor M1 to rotate in reverse.

[0051] During the forward and reverse rotation of the wiper motor M1 in the first system circuit, when the wiper motor starts and stops, the system voltage changes abruptly, and the system circuit is mainly formed through GND1.

[0052] Please see Figure 7The second system circuit includes a second microcontroller U4, resistors R7-R10, a driver chip U5, and load lamps Lamp1-Lamp2;

[0053] The second microcontroller U4 is electrically connected to one end of resistor R7, one end of resistor R9, and one end of resistor R8. The other end of resistor R7 is electrically connected to the Vin1 pin of driver chip U5. The other end of resistor R9 and one end of resistor R10 are electrically connected to the IS pin of driver chip U5. The other end of resistor R8 is electrically connected to the Vin2 pin of driver chip U5. The Vout1 pin of driver chip U5 is electrically connected to one end of load lamp Lamp1. The other end of load lamp Lamp1 is electrically connected to GND2. The Vout2 pin of driver chip U5 is electrically connected to one end of load lamp Lamp2. The other end of load lamp Lamp2 is electrically connected to GND2.

[0054] Specifically, the second microcontroller U4 drives the output of the driver chip U5, and the driver chip U5 outputs a high level to drive either the load lamp Lamp1 or Lamp2. Resistors R9 and R10 are connected so that the second microcontroller U4 can collect the driving status of the driver chip U5 through AD sampling. By collecting the voltage of the IS pin, it can be determined whether the load lamp Lamp1 or Lamp2 has a broken filament or whether the load current has changed.

[0055] When the load lamps Lamp1 and Lamp2 in the second system circuit are lit and extinguished, the system circuit mainly forms a loop through GND2; therefore, even when the wiper motor M1 is in operation, the impact on the voltage of the IS pin of the second microcontroller U4 through AD sampling is relatively small.

[0056] like Figure 8 As shown, in this embodiment, when GND1 and GND2 are connected to the vehicle wiring harness respectively, GND1 and GND2 should also be connected to each other. The analog ground and digital ground inside the first system circuit and the second system circuit are isolated and connected, and the module ground wire is connected by a single wire. The ground wire connection between the first system circuit and the second system circuit is a single wire ground to avoid crosstalk between the systems caused by ground connection problems.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle body controller system, characterized in that, The vehicle body controller system includes a power module, a first system circuit, and a second system circuit. The power module includes a DC-DC power conversion module and a linear regulator (LDO) power conversion module. The DC-DC power conversion module is electrically connected to the first system circuit, and the linear regulator (LDO) power conversion module is electrically connected to the second system circuit. The DC-DC power conversion module is used to convert power to the first system circuit, and the linear regulator (LDO) power conversion module is used to convert power to the second system circuit. The first system circuit is used to drive the wiper motor.

2. The vehicle body controller system as described in claim 1, characterized in that, The first system circuit includes a first microcontroller, a first drive circuit, and a motor load, wherein the first drive circuit is electrically connected to the first microcontroller and the motor load.

3. The vehicle body controller system as described in claim 1, characterized in that, The second system circuit includes a second microcontroller, a second drive circuit, and other loads, wherein the second drive circuit is electrically connected to the second microcontroller and the other loads respectively.

4. A vehicle body controller system as described in claim 1, characterized in that, The power ground of the first system circuit is connected to the GND1 terminal, and the power ground of the second system circuit is connected to the GND2 terminal.

5. A vehicle body controller system as described in claim 4, characterized in that, Power ground GND1 and power ground GND2 are isolated in the system circuit and connected together by a single wire.

6. A vehicle body controller system as described in claim 1, characterized in that, The DC-DC power conversion module includes a DC-DC power conversion unit, a resistor network, a filter unit, and an output inductor; The DC-DC power conversion unit is electrically connected to the resistor network, the filter unit, and the output inductor to form a power conversion circuit. The DC-DC power conversion unit is used to receive the input voltage and output the converted voltage through the output inductor.

7. A vehicle body controller system as described in claim 1, characterized in that, The linear regulator (LDO) power conversion module includes an LDO power conversion unit and a filter capacitor network. The LDO power conversion unit is electrically connected to the filter capacitor network, and the LDO power conversion unit is used to receive input voltage and output voltage.

8. A vehicle body controller system as described in claim 2, characterized in that, The first system circuit includes a first microcontroller, a switch driving unit, and a motor driving unit; The first microcontroller is electrically connected to the switch drive unit, and the switch drive unit is electrically connected to the motor drive unit. The first microcontroller is used to output control signals to the switch drive unit to control the motor drive unit to drive the wiper motor to rotate forward or backward.

9. A vehicle body controller system as described in claim 3, characterized in that, The second system circuit includes a second microcontroller, a current detection unit, and a load drive unit; The second microcontroller is electrically connected to the load driving unit, and the current detection unit is electrically connected to the second microcontroller and the load driving unit. The second microcontroller is used to output control signals to the load driving unit to drive the load, and to receive the status signal of the load current through the current detection unit.

10. A vehicle, characterized in that, Includes the body control system according to any one of claims 1-9.

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