CN215576222U

CN215576222U - New energy automobile vehicle control unit based on CAN bus awakens up

Info

Publication number: CN215576222U
Application number: CN202122189678.7U
Authority: CN
Inventors: 杨守亮; 林灿; 王欣; 朱思乐
Original assignee: Shanghai Ebus Automobile Power System Co ltd
Current assignee: Shanghai Ebus Automobile Power System Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-01-18
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a CAN transceiver U1, a common mode inductor U2, a protection circuit U3 and a control terminal resistor triode Q1. This kind of new energy automobile vehicle control unit based on CAN bus awakens up, CAN bus awakens up circuit outside satisfying ordinary CAN communication function, CAN carry out CAN bus specific frame ID and data through long-range high in the clouds and awaken up vehicle control unit and then awaken up other spare parts of whole car, and other isolation discrete schemes CAN greatly reduced vehicle control unit quiescent operating current (> 10mA) under the dormancy state. The controller of the circuit has small static power consumption, the static power consumption is less than 500uA under the standby dormancy, the service life of the storage battery is further prolonged, the ID and the data of the awakening frame and the terminal resistance which is configurable can meet various market requirements more conveniently, the circuit is simple in design, and the circuit has higher cost advantage and cost performance.

Description

New energy automobile vehicle control unit based on CAN bus awakens up

Technical Field

The utility model relates to the technical field of new energy vehicles, in particular to a new energy vehicle controller awakened based on a CAN bus.

Background

At present, the whole vehicle control of a new energy vehicle needs a whole vehicle controller to carry out instruction interaction and control through a CAN bus, a battery management system, a driving motor controller and other whole vehicle parts. The vehicle control unit of most motorcycle types awakens the mode through ignition key and the rifle awakens up going on at present, does not possess CAN bus and awakens up and the sleep function, if need CAN bus work after the whole car outage always, will lead to battery cell to supply power all the time, and then influences lead acid battery's static consumption, and the lead acid battery that stews for a long time is insufficient for electricity. Therefore, a controller of the whole new energy automobile based on CAN bus awakening is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a new energy automobile whole vehicle controller based on CAN bus awakening, so as to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a CAN bus wake-up-based new energy automobile vehicle controller comprises a CAN transceiver U1, a common mode inductor U2, a protection circuit U3, a control terminal resistor Q1, a pin 7 of the CAN transceiver U1 is connected with an R1, the other end of the R1 is connected with CAN _ INH, a pin 6 of the CAN transceiver U1 is connected with an R2, the other end of the R2 is connected with CAN _ SDI, a pin 5 and a pin 3 of the CAN transceiver U1 are connected with a 5V CANVCC of CAN, a pin 2 of the CAN transceiver U1 is connected with a CAN ground wire CANGND, a pin 4 of the CAN transceiver U1 is connected with CAN2_ RXDD _ ISO, a pin 1 of the CAN transceiver U1 is connected with a 2_ TXDD _ ISO, a pin 1 of the CAN transceiver U1 is connected with a resistor R3, a resistor R3 is connected with the other end of the CAN transceiver U1 is connected with a resistor SK 2R 3, a resistor SK 2R 8653, a resistor SK 5 and another end of the CAN transceiver U1 is connected with a resistor SK 5, the pin 9 of the CAN transceiver U1 is connected with a capacitor C1, the other end of the capacitor C1 is connected with CANGND, the pin 10 of the CAN transceiver U1 is connected with a capacitor C2, and C3 is connected with a positive battery voltage electrode 24V _ BAT in parallel, the other ends of the capacitors C2 and C3 are connected with CANGND in parallel, the pin 11 of the CAN transceiver U1 is connected with a resistor R8, the other end of the resistor R8 is connected with CAN _ SDO, the pin 14 of the CAN transceiver U1 is connected with a resistor R6 and an R6 in parallel, the other end of the resistor R6 is connected with CANGND, the other end of the resistor R6 is connected with CAN _ CS, the pin 1 and the pin 2 of the common mode inductor U6 are connected with the pin 13 of the CAN transceiver U6 to CANHI 6, the pin 3 and the pin 4 of the common mode inductor U6 are connected with the pin 12 of the CAN transceiver U6 to control resistor GPIO, the collector of the emitter 6, the emitter 6 is connected with a resistor GPIO control resistor, the emitter 6, the emitter of the resistor C6, the emitter 6 is connected with a control resistor GPIO control terminal of the control resistor. The other end of the R12 is connected with CANHI2, pin 6 of the protection circuit U3 is connected with CANLO2, pin 1 of the protection circuit U3 is connected with GND, pin 4 of the protection circuit U3 is connected with CANHI2, and pin 3 of the protection circuit U3 is connected with GND.

Preferably, the 24V _ BAT is connected with a positive voltage input by a storage battery, the 24V controller wakes up the 24V power, the GND is connected with a negative electrode of the storage battery, the CAN _ INH provides a wake-up signal for an external circuit, the CAN _ INH is connected with a wake-up loop of the whole vehicle controller, the controller is woken up at a high level, the CAN _ SDI is data input, the CAN _ SDO is data output, the CAN2_ RXD _ ISO is a data receiving pin, the CAN2_ TXD _ ISO is a data transmission pin, the CANVCC is a CAN5V power supply, the canngnd is a CAN ground, the CAN _ CS is connected with an I/O pin of the single chip microcomputer, the CAN _ SCK is CAN clock input, the GPIO141 is connected with an IO port of the MCU output for controlling high and low levels of signals, the cannlo 2 is CAN low, and the cannhi 2 is high.

Preferably, the control terminal resistor transistor Q1 is an NPN transistor, and controls the on/off of the control terminal resistor R12, the resistors R1, R2, R3, R6, R7, and R8 are current-limiting resistors, and the resistors R4 and R5 are voltage-dividing resistors.

Preferably, the capacitor C1 is a filter capacitor, the capacitors C2 and C3 are filter capacitors, the capacitors C2 and C3 have large and small capacitances, the large capacitor filters low-frequency waves, the small capacitor filters high-frequency waves, the resistor R11 is a current-limiting resistor, the transistor Q1 is controlled to be switched on and off, the resistor R12 is a terminal resistor, when the GPIO141 is at a high level, the transistor Q1 is controlled to be switched on, the terminal resistor R12 is switched in a circuit, and when the GPIO141 is at a low level, the transistor Q1 is controlled to be switched off, and the resistor R12 is not switched in the circuit.

Compared with the prior art, the utility model has the beneficial effects that: this kind of new energy automobile vehicle control unit based on CAN bus awakens up, CAN bus awakens up circuit outside satisfying CAN communication function, CAN carry out CAN bus specific frame ID and data through long-range high in the clouds (OTA) and awaken up vehicle control unit and then awaken up other spare parts of whole car, keeps apart discrete scheme other and CAN greatly reduced vehicle control unit quiescent operating current (> 10mA) under the dormant state. The controller of the circuit has small static power consumption, the static power consumption is less than 500uA under the standby dormancy, the service life of the storage battery is further prolonged, the ID and the data of the awakening frame and the terminal resistance which is configurable can meet various market requirements more conveniently, the circuit is simple in design, and the circuit has higher cost advantage and cost performance.

Drawings

FIG. 1 is a schematic diagram of an IO control module according to the present invention;

FIG. 2 is a schematic diagram of the circuit structure of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a CAN bus wake-up-based new energy automobile vehicle controller comprises a CAN transceiver U1, a common mode inductor U2, a protection circuit U3, a control terminal resistor Q1, a pin 7 of the CAN transceiver U1 is connected with an R1, the other end of the R1 is connected with CAN _ INH, a pin 6 of the CAN transceiver U1 is connected with an R2, the other end of the R2 is connected with CAN _ SDI, a pin 5 and a pin 3 of the CAN transceiver U1 are connected with a 5V CANVCC of CAN, a pin 2 of the CAN transceiver U1 is connected with a CAN ground wire CANGND, a pin 4 of the CAN transceiver U1 is connected with CAN2_ RXDD _ ISO, a pin 1 of the CAN transceiver U1 is connected with a 2_ TXDD _ ISO, a pin 1 of the CAN transceiver U1 is connected with a resistor R3, a resistor R3 is connected with the other end of the CAN transceiver U1 is connected with a resistor SK 2R 3, a resistor SK 2R 8653, a resistor SK 5 and another end of the CAN transceiver U1 is connected with a resistor SK 5, the pin 9 of the CAN transceiver U1 is connected with a capacitor C1, the other end of the capacitor C1 is connected with CANGND, the pin 10 of the CAN transceiver U1 is connected with a capacitor C2, and C3 is connected with a positive battery voltage electrode 24V _ BAT in parallel, the other ends of the capacitors C2 and C3 are connected with CANGND in parallel, the pin 11 of the CAN transceiver U1 is connected with a resistor R8, the other end of the resistor R8 is connected with CAN _ SDO, the pin 14 of the CAN transceiver U1 is connected with a resistor R6 and an R6 in parallel, the other end of the resistor R6 is connected with CANGND, the other end of the resistor R6 is connected with CAN _ CS, the pin 1 and the pin 2 of the common mode inductor U6 are connected with the pin 13 of the CAN transceiver U6 to CANHI 6, the pin 3 and the pin 4 of the common mode inductor U6 are connected with the pin 12 of the CAN transceiver U6 to control resistor GPIO, the collector of the emitter 6, the emitter 6 is connected with a resistor GPIO control resistor, the emitter 6, the emitter of the resistor C6, the emitter 6 is connected with a control resistor GPIO control terminal of the control resistor. The other end of the R12 is connected with CANHI2, pin 6 of the protection circuit U3 is connected with CANLO2, pin 1 of the protection circuit U3 is connected with GND, pin 4 of the protection circuit U3 is connected with CANHI2, and pin 3 of the protection circuit U3 is connected with GND.

The controller is awakened at a high level, the CAN _ SDI is data input, the CAN _ SDO is data output, the CAN2_ RXD _ ISO is a data receiving pin, the CAN2_ TXD _ ISO is a data transmission pin, the CANVCC is a CAN5V power supply, the CANGND is a CAN ground wire, the CAN _ CS is connected with a single chip microcomputer I/O pin, the CAN _ SCK is CAN clock input, the GPIO141 is connected with a CAN output IO port for controlling the high and low levels of signals, the CANLO2 is CAN low, and the CANHI2 is high.

Further, the control terminal resistor transistor Q1 is an NPN transistor, and controls the on/off of the control terminal resistor R12, the resistors R1, R2, R3, R6, R7, and R8 are current limiting resistors, and the resistors R4 and R5 are voltage dividing resistors.

Furthermore, the capacitor C1 is a filter capacitor, the capacitors C2 and C3 are filter capacitors, the capacitors C2 and C3 have large and small capacitances, the large capacitor filters low-frequency waves, the small capacitor filters high-frequency waves, the resistor R11 is a current-limiting resistor, the transistor Q1 is controlled to be switched on and off, the resistor R12 is a terminal resistor, when the GPIO141 is at a high level, the transistor Q1 is controlled to be switched on, the terminal resistor R12 is connected to a circuit, when the GPIO141 is at a low level, the transistor Q1 is controlled to be switched off, and the resistor R12 is not connected to the circuit.

Specifically, in the utility model, when the whole vehicle is powered on to work, the CAN transceiver U1 CAN be waken up by connecting a WAKE pin with 24V externally to realize a CAN communication function;

when the whole vehicle is powered off and sleeps, the CAN transceiver U1 is powered on by a storage battery to detect the active state of the CAN bus, when no activity on the bus reaches a certain time, the CAN transceiver U1 enters a sleep mode, and when the CAN transceiver U1 is in the sleep mode and a specific wake-up frame appears on the CAN bus, the CAN transceiver U35H outputs a high level to activate a wake-up loop of the whole vehicle controller and enter a standby mode.

The CAN transceiver U1 has five operating modes, a normal mode, a standby mode, a sleep mode, an off mode and an over-temperature mode, and the mode is selected by setting the MC bit in the mode status register, the CAN transceiver operating mode depends on setting the CMC bit in the CAN control register and the operating mode of the CAN transceiver U1, the PNCOK bit in the configuration CAN controller register CAN set whether to enable the partial network of the CAN, and the CAN partial network in the CAN transceiver U1 allows the nodes to be selectively activated in the CAN network in response to a dedicated wakeup frame (WUF). Only functionally needed nodes are active on the bus, while other nodes remain in low power mode until needed, setting the CME bit in the transceiver event capture enable register to decide whether CAN wake up is enabled.

Wakeup frame format: a standard (11-bit) or extended (29-bit) identifier, set in IDE bits in the frame controller register, an identifier mask defined in a mask register, and a valid WUF identifier defined and stored in the ID register. An ID mask may be defined to allow a group of identifiers to be identified as valid by a single node.

When a valid CAN wake-up mode is detected on the bus, the wake-up bit CW in the set transceiver event status register is set and pin RXD is pressed low. If the CAN transceiver U1 detects the wake-up mode while in sleep mode, it outputs a high level on the control pin CAN _ INH to activate the wake-up loop of the vehicle controller and enter a standby mode.

The CAN transceiver U1 CAN enter a sleep mode through an SPI command in a normal mode, when CANVCC is under-voltage for a certain time, U1 also automatically enters the sleep mode, when the CANVCC enters the sleep mode, CAN _ INH is in a high impedance state, an internal transceiver cannot receive and send data, the current of a pin BAT is reduced to the minimum, any awakening and interrupting time CAN awaken the CAN transceiver U1, so that the CAN transceiver U1 enters a standby mode and waits to be awakened; when the temperature of the main chip reaches a certain temperature threshold value, the CAN transceiver U1 enters an over-temperature mode, the CAN transceivers are disabled in the over-temperature mode, the CAN pins enter a high-ohmic state, the awakening event on the CAN lines cannot be detected, and when the temperature is reduced to be lower than the temperature threshold value, the CAN transceiver U1 enters a standby mode to wait for awakening; if the battery voltage is lower than the shutdown threshold, the CAN transceiver U1 directly enters the shutdown mode, and no matter what mode the CAN transceiver U1 is in, when the battery voltage recovers and is higher than the startup threshold, the CAN transceiver U1 enters the standby mode to wait for awakening; the standby mode is a primary power saving mode of U1, the transceiver cannot transmit and receive data in the standby mode, but CAN start remote CAN wakeup through the wakeup mode and a specific wakeup frame, the CAN _ INH pin is in an active state, the CAN _ INH pin monitors bus activity, and when the activity on the bus is detected, the CAN _ INH pin is in a high level and is used for waking up the whole vehicle controller.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a new energy automobile vehicle control unit based on CAN bus awakens up, includes CAN transceiver U1, common mode inductance U2, protection circuit U3, control terminal resistance triode Q1, its characterized in that: the pin 7 of the CAN transceiver U1 is connected with an R1, the other end of the R1 is connected with CAN _ INH, the pin 6 of the CAN transceiver U1 is connected with R2, the other end of the R2 is connected with CAN _ SDI, the pins 5 and 3 of the CAN transceiver U1 are connected with CAN5V CANVCC, the pin 2 of the CAN transceiver U1 is connected with CAN ground wire CANGND, the pin 4 of the CAN transceiver U1 is connected with CAN2_ RXD _ ISO, the pin 1 of the CAN transceiver U1 is connected with CAN2_ TXD _ ISO, the pin 1 of the CAN transceiver U1 is connected with a resistor R3, the resistor R3 is connected with another CAN _ SK, the pin 9 of the CAN transceiver U1 is connected with a resistor R4, the other end of the resistor R4 is connected with CAN 24V, the pin 24V BATR 5, the resistor R5, the other end of the CAN transceiver U1 is connected with CAN terminal of the capacitor CAN NO 1 and the positive pole of the CAN transceiver U1 is connected with the capacitor ND 1C 1, the positive pole of the CAN transceiver U1 and the capacitor ND 1 is connected with the battery 1C 1 and the positive pole of the battery 1, the other ends of the capacitors C2 and C3 are connected in parallel to CANGND, the pin 11 of the CAN transceiver U1 is connected to the resistor R8, the other end of the resistor R8 is connected to CAN _ SDO, the pin 14 of the CAN transceiver U1 is connected to the resistor R6, the parallel end of the resistor R7, the other end of the resistor R6 is connected to CANGND, the other end of the resistor R7 is connected to CAN _ CS, the pin 1 and the pin 2 of the common mode inductor U2 are connected to the pin 13 of the CAN transceiver U1 and are connected to canni 2, the pin 3 and the pin 4 of the common mode inductor U2 are connected to the pin 12 of the CAN transceiver U1 and are connected to canno 2, the base-stage resistor R2 of the control terminal resistor triode Q2, the other end of the resistor R2 is connected to 141, the emitter of the control terminal resistor Q2 is connected to the canno transistor 2, the collector of the control terminal resistor R2 is connected to the other end of the canno 3, the canno 3 is connected to the protection circuit GND 2, and the collector of the canno 3 is connected to the protection circuit U2, pin 4 of the protection circuit U3 is connected with CANHI2, and pin 3 of the protection circuit U3 is connected with GND.

2. The CAN bus wake-up based vehicle control unit for the new energy automobile according to claim 1, characterized in that: the 24V _ BAT is connected with a positive voltage input by a storage battery, the 24V controller wakes up 24V electricity after being awakened, the GND is connected with a negative electrode of the storage battery, the CAN _ INH provides an awakening signal for an external circuit, the CAN _ INH is connected with an awakening loop of a whole vehicle controller, the controller is awakened at a high level, the CAN _ SDI is data input, the CAN _ SDO is data output, the CAN2_ RXDD _ ISO is a data receiving pin, the CAN2_ TXD _ ISO is a data transmission pin, the CANVCC is a CAN5V power supply, the CANGND is a CAN ground wire, the CAN _ CS is connected with an I/O pin of a single chip microcomputer, the CAN _ SCK is CAN clock input, the GPIO141 is connected with an MCU output IO port for controlling the high and low levels of signals, the CANLO2 is CAN low, and the CANHI2 is CAN high.

3. The CAN bus wake-up based vehicle control unit for the new energy automobile according to claim 1, characterized in that: the control terminal resistor triode Q1 is an NPN type triode, the on and off of a control terminal resistor R12 are controlled, the resistors R1, R2, R3, R6, R7 and R8 are current-limiting resistors, and the resistors R4 and R5 are voltage-dividing resistors.

4. The CAN bus wake-up based vehicle control unit for the new energy automobile according to claim 1, characterized in that: the capacitor C1 is a filter capacitor, the capacitors C2 and C3 are filter capacitors, the capacitors C2 and C3 are respectively large and small in capacitance, large capacitors filter low-frequency waves, small capacitors filter high-frequency waves, the resistor R11 is a current-limiting resistor, a triode Q1 is controlled to be switched on and off, the resistor R12 is a terminal resistor, when the GPIO141 is at a high level, the triode Q1 is controlled to be switched on, the terminal resistor R12 is connected into a circuit, when the GPIO141 is at a low level, the triode Q1 is controlled to be switched off, and the resistor R12 is not connected into the circuit.