CN210707263U

CN210707263U - A low-power consumption dormancy circuit for new energy automobile VCU

Info

Publication number: CN210707263U
Application number: CN201921440695.XU
Authority: CN
Inventors: 王青松; 王冬; 李胜杰; 张德志; 陈安辉; 王栋; 卢立户
Original assignee: Shanghai Zhuotong Technology Consulting Center LP
Current assignee: Shanghai Zhikong Drive Technology Co., Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-09
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a low-power consumption dormancy circuit for new energy automobile VCU, including low pressure battery and the power control circuit who is connected with low pressure battery respectively, high limit drive control circuit, power control circuit passes through voltage stabilizing circuit and connects CAN transceiver and treater respectively, voltage stabilizing circuit still connects outside drive control circuit, outside drive control circuit connects the outside whole car drive circuit of outside drive control circuit connection, high limit drive control circuit is connected with high limit drive circuit, the treater respectively with power control circuit, outside drive control circuit and high limit drive control circuit are connected. Compared with the prior art, the utility model discloses whether have according to the outside to awaken up the source and control VCU work in different modes, when VCU is in dormant state, processor control outside drive control circuit and high limit drive control circuit all are in the off-state, only treater and CAN transceiver are in power supply state and get into dormant mode to this reduces VCU's dormancy consumption.

Description

A low-power consumption dormancy circuit for new energy automobile VCU

Technical Field

The utility model belongs to the technical field of new energy automobile electron and specifically relates to a low-power consumption dormancy circuit for new energy automobile VCU is related to.

Background

With the continuous popularization and promotion of new energy automobiles, the functions of the new energy automobiles are continuously increased and improved, the number of automobile electronic ECU modules is also continuously increased, and meanwhile, the consumption of power supplies is also increased. After the automobile is started, each ECU module of automobile electronics is in a working state, and the consumption of the ECU module is quite large and reaches as high as the current consumption of hundreds of milliamperes. After the automobile is parked, the ECU module is sometimes required to detect and process relevant states of the automobile at regular time, if the ECU module is in an awakening state all the time, the power consumption of each ECU module can reach more than 100 milliamperes, so that the ECU enters a sleep mode and has a timed awakening function, the power consumption of the ECU module is reduced to be within 2 milliamperes in the sleep mode, and the power consumption of the ECU module is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a low-power consumption dormancy circuit for new energy automobile VCU in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a low-power consumption dormancy circuit for new energy automobile VCU, includes low-voltage battery and the power control circuit, the high limit drive control circuit who are connected with low-voltage battery respectively, power control circuit connects CAN transceiver and treater respectively through voltage stabilizing circuit, voltage stabilizing circuit still connects outside drive control circuit, outside drive control circuit connects the outside whole car drive circuit, high limit drive control circuit is connected with high limit drive circuit, the treater is connected with power control circuit, outside drive control circuit and high limit drive control circuit respectively.

Preferably, the power control circuit comprises a surge absorption circuit, an MOS (metal oxide semiconductor) tube reverse-connection preventing circuit and a first PMOS (P-channel metal oxide semiconductor) tube circuit which are sequentially connected, the first PMOS tube circuit is connected with a first processor signal control circuit, and the surge absorption circuit is connected with the low-voltage storage battery.

Preferably, the first processor signal control circuit comprises a first triode.

Preferably, the external driving control circuit comprises a second processor signal control circuit and a second PMOS transistor circuit which are connected with each other, and the second PMOS transistor circuit is connected with the voltage stabilizing circuit.

Preferably, the second processor signal control circuit comprises a second triode.

Preferably, the high-side driving control circuit comprises a third PMOS transistor circuit and a fourth PMOS transistor circuit which are connected with each other, the third PMOS transistor circuit is connected with the low-voltage storage battery, and the fourth PMOS transistor circuit is connected with a third processor signal control circuit.

Preferably, the third PMOS transistor circuit includes a third PMOS transistor, the fourth PMOS transistor circuit includes a fourth PMOS transistor, and an S pin of the third PMOS transistor is connected to an S pin of the fourth PMOS transistor.

Preferably, the low-voltage storage battery is connected with a feed detection circuit and a charging circuit.

Compared with the prior art, the utility model has the advantages of it is following:

1. after the automobile is parked, when the processor detects that the awakening source is invalid and no CAN message exists, the VCU enters the sleep mode, only the processor and the CAN transceiver are in the power supply state and enter the sleep mode, and the sleep power consumption of the VCU is reduced.

2. The advantage of separately connecting the VCU internal supply and the external drive supply to the low voltage battery is: the external driving chip mainly drives the relay and other accessories in the whole vehicle, the power supply and the power supply of the internal processor, the CAN transceiver and the like are independently separated, so that the interference of the external accessories to other chips in the VCU through a power line CAN be reduced on the one hand, and the static loss of the high-side driving chip in the sleep mode CAN be eliminated on the other hand.

Drawings

Fig. 1 is an overall circuit block diagram of the present invention;

fig. 2 is a circuit diagram of the power supply control circuit of the present invention;

fig. 3 is a circuit diagram of an external driving control circuit in the present invention;

fig. 4 is a high-side driving control circuit diagram of the present invention.

The figure is marked with: 1. the system comprises a low-voltage storage battery, 2, a power supply control circuit, 3, a high-side drive control circuit, 4, a voltage stabilizing circuit, 5, a CAN transceiver, 6, a processor, 7, an external drive control circuit, 8, an external whole vehicle drive circuit and 8, a high-side drive circuit.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Examples

As shown in fig. 1, the present application provides a low power consumption sleep circuit for a new energy vehicle VCU, which includes a low-voltage battery 1, and a power control circuit 2 and a high-side driving control circuit 3 respectively connected to the low-voltage battery 1. The power control circuit 2 is respectively connected with the CAN transceiver 5 and the processor 6 through a voltage stabilizing circuit 4 to form a main power circuit. The voltage stabilizing circuit 4 is also connected with an external drive control circuit 7, and the external drive control circuit 7 is connected with an external vehicle driving circuit 8. The high-side drive control circuit 3 is connected to the high-side drive circuit 9. The processor 6 is connected to the power supply control circuit 2, the external drive control circuit 7, and the high-side drive control circuit 3, respectively. The low-voltage storage battery 1 is connected with a feed detection circuit and a charging circuit.

When the VCU has no wake-up source but needs the timer of the processor 6 to generate periodic wake-up, the processor 6 keeps outputting a level to control the main power circuit to be turned on, and simultaneously enters the sleep mode, the power consumption thereof is reduced to microampere level, and the CAN transceiver 5 also enters the sleep mode. The wake-up source comprises an external hardware level signal or a CAN level signal. The low-voltage storage battery 1 provides current required by sleep for the processor 6 and the CAN transceiver 5 after passing through the voltage stabilizing circuit 4.

When the VCU enters the low power consumption mode, the peripheral interface of the processor 6 is no longer effectively controlled by all other interfaces except the main power control interface which is in the normal operation mode control state. The external drive control circuit 7 and the high-side drive control circuit 3 are in an off state, and only the processor 6 and the CAN transceiver 5 of the whole VCU are in a power supply state of a sleep mode, but the power consumption of the VCU is extremely low, so that the power consumption of the whole VCU is reduced to microampere level.

After the VCU enters the low power consumption mode, the VCU automatically wakes up and detects the related state of the automobile at regular time and performs corresponding processing according to the actual requirement of the automobile, for example, whether the voltage of the low-voltage storage battery 1 is fed is detected, the DCDC is started to charge the low-voltage storage battery 1, the electric quantity of the voltage storage battery is kept, and the whole automobile can be started normally.

When an external wake-up source or a CAN message is input to the processor 6 in the sleep mode of the VCU, the processor 6 and the CAN transceiver 5 exit the sleep mode and enter a normal working mode, the processor 6 outputs a control level to the external drive control circuit 7 and the high-side drive control circuit 3, the power supply of the two paths is closed, and the VCU enters the normal working mode.

As shown in fig. 2, the power control circuit 2 includes a surge absorption circuit, a MOS transistor reverse-connection preventing circuit, and a first PMOS transistor circuit, which are connected in sequence, the first PMOS transistor circuit is connected to a first processor signal control circuit, and the surge absorption circuit is connected to the low-voltage battery 1. The first processor signal control circuit includes a first transistor Q3. When the processor 6 enters the sleep mode, the processor 6 controls to enter the sleep mode and keeps outputting a high level to the power control circuit 2, and the first triode Q3 in the circuit is conducted, so that the PMOS transistor U10 is controlled to be in a conducting state, and the low-voltage storage battery 1 provides a power supply for the voltage stabilizing circuit 4. Wherein D30 is a transient voltage suppression diode for absorbing surge voltage in the circuit. U6 is an anti-reverse MOS transistor, and the MOS transistor voltage drop is relatively low compared with a diode anti-reverse MOS transistor. The function of the power control circuit 2 is to maintain power to the voltage regulator circuit 4 when the external wake-up source is inactive.

As shown in fig. 3, the external driving control circuit 7 includes a second processor signal control circuit and a second PMOS transistor circuit connected to each other, and the second PMOS transistor circuit is connected to the voltage regulator circuit 4. The second processor signal control circuit includes a second transistor Q2. When the VCU is in a normal operating mode, the processor 6 outputs a high level to the external driving control circuit 7, and the second triode Q2 in the control circuit is turned on, so that the PMOS transistor U31 is turned on, and the 5V voltage output by the voltage stabilizing circuit 4 is used for supplying power to other chips of the external vehicle driving circuit 8 in the VCU. When the external wake-up source of the VCU is invalid and there is no CAN message, the processor 6 controls the circuit to be in an off state, the output of the voltage stabilizing circuit 4 only provides power supply for the processor 6 and the CAN transceiver 5, and the VCU enters a sleep mode.

As shown in fig. 4, the high-side driving control circuit 3 includes a third PMOS transistor circuit and a fourth PMOS transistor circuit connected to each other, the third PMOS transistor circuit is connected to the low-voltage battery 1, and the fourth PMOS transistor circuit is connected to a third processor signal control circuit. The third PMOS tube circuit comprises a third PMOS tube, the fourth PMOS tube circuit comprises a fourth PMOS tube, and the S pin of the third PMOS tube is connected with the S pin of the fourth PMOS tube. When the VCU is in the normal operation mode, the processor 6 outputs a high level to the high-side driving control circuit 3, and the transistor Q1 in the circuit is turned on, so that the PMOS transistor U33 is turned on, and the low-voltage battery 1 provides power for the chip of the high-side driving circuit 9. When the external wake-up source of the VCU is invalid and there is no CAN message, the processor 6 controls the high-side driving control circuit 3 to be in the off state, the output of the voltage stabilizing circuit 4 only supplies power to the processor 6 and the CAN transceiver 5, and the VCU enters the sleep mode.

Claims

1. The utility model provides a low-power consumption dormancy circuit for new energy automobile VCU, its characterized in that, includes low-voltage storage battery and power control circuit, the high limit drive control circuit who is connected with low-voltage storage battery respectively, power control circuit passes through voltage stabilizing circuit and connects CAN transceiver and treater respectively, voltage stabilizing circuit still connects outside drive control circuit, outside drive control circuit connects whole car drive circuit in the outside, high limit drive control circuit is connected with high limit drive circuit, the treater is connected with power control circuit, outside drive control circuit and high limit drive control circuit respectively.

2. The low-power-consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 1, wherein the power control circuit comprises a surge absorption circuit, an MOS (metal oxide semiconductor) tube anti-reverse connection circuit and a first PMOS (P-channel metal oxide semiconductor) tube circuit which are connected in sequence, the first PMOS tube circuit is connected with a first processor signal control circuit, and the surge absorption circuit is connected with the low-voltage storage battery.

3. The low-power consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 2, wherein the first processor signal control circuit comprises a first triode.

4. The low-power consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 1, wherein the external drive control circuit comprises a second processor signal control circuit and a second PMOS transistor circuit which are connected with each other, and the second PMOS transistor circuit is connected with the voltage stabilizing circuit.

5. The low-power consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 4, wherein the second processor signal control circuit comprises a second triode.

6. The low-power-consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 1, wherein the high-side driving control circuit comprises a third PMOS tube circuit and a fourth PMOS tube circuit which are connected with each other, the third PMOS tube circuit is connected with the low-voltage storage battery, and the fourth PMOS tube circuit is connected with a third processor signal control circuit.

7. The low-power-consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 6, wherein the third PMOS transistor circuit comprises a third PMOS transistor, the fourth PMOS transistor circuit comprises a fourth PMOS transistor, and an S pin of the third PMOS transistor is connected with an S pin of the fourth PMOS transistor.

8. The low-power-consumption sleep circuit for the VCU of the new energy automobile as claimed in claim 1, wherein the low-voltage storage battery is connected with a feed detection circuit and a charging circuit.