CN103770728A - Communication circuit for electric vehicle based on CAN bus - Google Patents
Communication circuit for electric vehicle based on CAN bus Download PDFInfo
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- CN103770728A CN103770728A CN201210407328.6A CN201210407328A CN103770728A CN 103770728 A CN103770728 A CN 103770728A CN 201210407328 A CN201210407328 A CN 201210407328A CN 103770728 A CN103770728 A CN 103770728A
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Abstract
The invention provides a communication circuit for an electric vehicle based on a CAN bus. The communication circuit comprises a CAN receiving and sending device and a signal control circuit electrically connected with the CAN receiving and sending device. The CAN receiving and sending device is used for transmitting communication data between a master control unit and an auxiliary control unit of a vehicle control unit of the electric vehicle. The signal control unit is used for carrying out rectifier filtering on the communication data and filtering interference signals in the communication data out. The CAN receiving and sending device at least comprises a first CAN receiving and sending device without a wakeup function and a second CAN receiving and sending device with a wakeup function, and the first CAN receiving and sending device and the second CAN receiving and sending device are respectively connected with the signal control circuit. According to the technical scheme, strong expandability is achieved, and the communication requirements for high strength and high complexity of the electric vehicle can be met.
Description
Technical field
The invention belongs to electrical device of electric vehicle control field, relate in particular to a kind of equipment protecting equipment and method of work thereof of electronlmobil.
Background technology
Current all kinds of microcontroller is more and more extensive in the application of field of automobile control, and vehicle electronics degree is more and more higher.For reducing costs and simplifying wire harness and be connected, the various bus control technologys of the numerous and confused employing of each automaker, reach the object that realizes real time data exchange complicated between the electronic control unit that automobile is numerous, CAN bus is one of topmost bus protocol wherein, because it has that transfer rate is high, cost is low and failure-free mistake is processed and the feature such as error-detection mechanism, so be very naturally subject to widespread use in auto-industry.
CAN communication network in currently available technology on automobile, its node of network mainly comprises control unit for automatic shift, engine electric spray control unit, ABS system control unit, vehicle body control unit etc.Offered load is low; communication need is not high; only there is a layer diagnosis subnet; network topology structure is too single; extensibility is not strong; and on circuit is realized; existing communicating circuit in CAN bus generally without any safety method; in this case; in the time that bus load increases, the pressure drop in bus and in the situation that signal to interference ratio is more serious, bus there will be unsettled situation; and what this defect can embody in containing much information is more and more obvious, the safety of car load is had to very large impact.But for the special field of electronlmobil, its number of network node is more than the nodes of orthodox car,, stability higher than conventional vehicle body network speed, reliability requirement are stricter, integrated traditional subnetwork, electronic subnetwork (comprising pure electronic subnetwork and hybrid power subnetwork), demarcation, diagnosis subnetwork are integrated simultaneously, and conventional CAN bus communication network is difficult to adapt to the high strength of electronlmobil, the communication need of high complexity.
Summary of the invention
It is too single that the present invention is intended to solve in prior art CAN communication network topology structure; extensibility is not strong; the technical matters that communicating circuit is not protected, provides a kind of communicating circuit used for electric vehicle based on CAN bus, adapts to the communication need of electronlmobil high strength, high complexity.
The invention provides a kind of communicating circuit used for electric vehicle based on CAN bus, described electronlmobil comprises the attached control unit on entire car controller main control unit and electronlmobil, the signal control circuit that described communicating circuit used for electric vehicle comprises CAN transceiver and is electrically connected with CAN transceiver;
CAN transceiver, for transmitting the communication data between entire car controller main control unit and the attached control unit of electronlmobil;
Signal control circuit, for to described communication data rectifying and wave-filtering, the interfering signal in filtering communication data;
Described CAN transceiver at least comprises not the CAN transceiver with arousal function and a 2nd CAN transceiver with arousal function, a described CAN transceiver is connected with a signal control circuit respectively with the 2nd CAN transceiver, is respectively used to transmit the communication data between entire car controller main control unit and attached control unit.
Preferably, described each signal control circuit comprises that two are connected in series by resistance and inductance the first branch road and the second branch road that form respectively, described first branch road one end is for being connected with the pin CANH of CAN transceiver, described second branch road one end is for being connected with the pin CANL of CAN transceiver, and the other end of the first branch road and the second branch road is connected with CAN bus respectively.
Preferably, respectively and connect a resistance, the other end of resistance passes through capacity earth for described the first branch road and the second branch road.
Preferably, described the first branch road and the second branch road are respectively and connect the zener diode combination of a differential concatenation, the other end ground connection of described diode combinations.
Preferably, an electric capacity is gone back respectively and be connected to described the first branch road and the second branch road, the other end ground connection of electric capacity.
Preferably, in the time that described electronlmobil is pure electric automobile, attached control unit on described automobile comprises vehicle body control unit, inline diagnosis unit and transmission control unit, pin TXD, the RXD of a described CAN transceiver is connected with entire car controller main control unit, pin CANH, CANL be connected with one end of two branch roads of signal control circuit respectively, the other end of described two branch roads is connected with vehicle body control unit, inline diagnosis unit and transmission control unit by CAN bus respectively;
In the time that described electronlmobil is hybrid vehicle, attached control unit on described automobile comprises vehicle body control unit, engine management unit, inline diagnosis unit and transmission control unit, pin TXD, the RXD of a described CAN transceiver is connected with entire car controller main control unit, pin CANH, CANL be connected with one end of two branch roads of signal control circuit respectively, the other end of described two branch roads is respectively by CAN bus and vehicle body control unit, and engine management unit, inline diagnosis unit and transmission control unit are connected.
Preferably, attached control unit on described electronlmobil also comprises motor control unit, battery management module unit, pin TXD, the RXD of described the 2nd CAN transceiver is connected with entire car controller main control unit, pin CANH, CANL be connected with one end of two branch roads of signal control circuit respectively, the other end of described two branch roads is respectively by CAN bus and motor control unit, and battery management module unit is connected.
Preferably, described the 2nd CAN transceiver is also provided with the pin being electrically connected with entire car controller main control unit
and pin EN;
Work as pin
and pin EN is simultaneously when input high level signal, the 2nd CAN transceiver is in normal mode;
Work as pin
and pin EN is simultaneously when input low level signal, the 2nd CAN transceiver is in standby mode;
Work as pin
input high level signal, when pin EN input low level signal, the 2nd CAN transceiver is in only listening pattern;
Work as pin
the flat signal of input height, when pin EN input high level signal, the 2nd CAN transceiver is in sleep pattern.
Preferably, described the 2nd CAN transceiver is also provided with pin WAKE and pin INH, described pin WAKE is connected with entire car controller main control unit respectively with pin INH, described pin INH is for wake entire car controller main control unit up in the time receiving wake-up signal in CAN bus, and described WAKE pin sends wake-up signal wakes CAN transceiver for entire car controller main control unit and enters normal mode by sleep pattern.
Preferably, described CAN transceiver also comprises a 3rd CAN transceiver with arousal function, and described the 3rd CAN transceiver is electrically connected with entire car controller main control unit and a signal control circuit respectively.
The above technical scheme, carry out communication for controlling entire car controller from the attached control unit on different electronlmobil by increased at least two CAN transceivers in hybrid vehicle system, two CAN transceivers are independently electrically connected with entire car controller main control unit and a signal control circuit respectively, greatly improve the data volume of Full Vehicle System communication, the communication rapid and convenient more that makes other controllers on entire car controller and electronlmobil, has improved the performance of car load control.And by the effectively data interfering signal in filtering communication process of signal control circuit, communicating circuit has been carried out to effective protection, can adapt to the communication need of electronlmobil high strength, high complexity.
Accompanying drawing explanation
Fig. 1 is the module composition diagram that the present invention is based on a kind of embodiment of communicating circuit used for electric vehicle of CAN bus;
Fig. 2 is the communicating circuit used for electric vehicle communication connection diagram on electronlmobil that the present invention is based on CAN bus;
Fig. 3 is the not communicating circuit structural representation with arousal function that the present invention is based on the communicating circuit used for electric vehicle of CAN bus;
Fig. 4 is the communicating circuit structural representation with arousal function that the present invention is based on the communicating circuit used for electric vehicle of CAN bus.
The specific embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the invention provides a kind of communicating circuit used for electric vehicle based on CAN bus, electronlmobil described in the application refers to the automobile with electric model, comprise pure electric automobile and the hybrid vehicle with electric model, the hybrid vehicle described in the application all refers to have the hybrid vehicle of electric model.Electronlmobil involved in the present invention comprises the attached control unit 40 on entire car controller main control unit 10 and electronlmobil, attached control unit described here comprises other control units on the electronlmobil except entire car controller, as vehicle body control unit, engine management unit (have this unit on hybrid vehicle, pure electric automobile is without this element), inline diagnosis unit, transmission control unit, motor control unit, battery management module unit etc.The signal control circuit 30 that described communicating circuit comprises CAN transceiver 20 and is electrically connected with CAN transceiver 20, described CAN transceiver 20 transmits two communication datas between the communication unit that mutually carries out communication, described signal control circuit 30 is for described communication data is carried out to rectifying and wave-filtering, the interfering signal of adulterating in filtering communication data.
As shown in Figure 2, CAN transceiver 20 of the present invention at least comprises not the CAN transceiver 21 with arousal function and a 2nd CAN transceiver 22 with arousal function, a described CAN transceiver 21 is connected with a signal control circuit respectively with the 2nd CAN transceiver 22, a CAN transceiver is connected with a signal control circuit 31, the 2nd CAN transceiver 22 is connected with a signal control circuit 32, the structure of described two signal control circuits is identical, a described CAN transceiver 21 and described the 2nd CAN transceiver 22 are respectively used to transmit the communication data between entire car controller main control unit 10 and attached control unit 40.A described CAN transceiver 21 is for the high-speed data communications between entire car controller main control unit 10 and vehicle body control unit, engine management unit (have this unit on hybrid vehicle, pure electric automobile is without this element), inline diagnosis unit and transmission control unit etc.; Described the 2nd CAN transceiver 22 is for entire car controller main control unit 10 and motor control unit, the high-speed data communications of battery management module unit etc., motor control unit described here comprises precursor motor control unit and the rear-guard motor control unit on electronlmobil.
Further, CAN transceiver 20 of the present invention also comprises that one is also electrically connected with a signal control circuit for the 3rd CAN transceiver 23, the three CAN transceivers 23 that are electrically connected with entire car controller main control unit 10.The structure 23 of the 3rd CAN transceiver 23 is identical with the structure 22 of the 2nd CAN transceiver, and the signal control circuit 33 that the 3rd CAN transceiver 23 connects is also identical with the structure of the signal control circuit 31,32 being connected with a CAN transceiver 20 and the 2nd CAN transceiver 22 respectively recited above.The 3rd CAN transceiver 23 described here is temporarily vacant, and reserved this road CAN transceiver communicating circuit, for expansion, has increased alerting ability and the extensibility of system, for other hardware systems and the peripheral hardware upgrading of installing on following electronlmobil provide convenient.
At least two-way CAN communicating circuit that the above embodiment of the present invention the provides communication broadband that can provide larger of simultaneously working, can complete communication task more complicated and that data volume is huge, in overall performance, not only realize the demand that is difficult to reach high speed communication in traditional CAN communication network, and the reliability of the CAN network greatly improving by peripheral circuit, in order to tackle in electronlmobil complex environment more and to have improved the stability of CAN communication under the various harsies environment that electronlmobil may run into.
Below, the concrete structure of Jiang Duige of the present invention road CAN communicating circuit composition and function describe in detail one by one.
Described in Fig. 3 and Fig. 4, signal control circuit of the present invention comprises that two are connected in series by resistance and inductance the first branch road and the second branch road that form respectively, described first branch road one end is for being connected with the pin CANH of CAN transceiver, described second branch road one end is for being connected with the pin CANL of CAN transceiver, and the other end of the first branch road and the second branch road is connected with CAN bus respectively.
In Fig. 3, wherein route resistance R 5 and inductance L 1 serial connection of signal control circuit form, another route resistance R 6 and inductance L 2 serial connections form, the one CAN transceiver 21 is received the communication data that on electronlmobil, attached control unit 40 sends and is sent this communication data to car load control unit by these two articles of branch roads, first transceiver 21 receives the communication data of car load control unit transmission and sends this communication data to attached control unit 40 on vehicle by building two branch roads simultaneously, described two branch roads can disturb in order to the common-mode signal in filtering communication data by the combination setting of resistance and inductance, purify the communication data of attached control unit 40 on entire car controller and electronlmobil, guarantee high efficiency and the stability of communicating circuit work.
Preferably, respectively and connect the resistance of 60 Ω, the other end of resistance passes through capacity earth for the first branch road described in described Fig. 3 and the second branch road.According to ISO 11898, specified bus load in CAN communicating circuit is 60 Ω, therefore all resistance of termination of the end of every CAN bus, described resistance is preferably the resistance of 120 Ω, in order to improve the Electro Magnetic Compatibility of CAN high-speed bus system, after being mutually connected in series, be connected between two branch roads with two 60 Ω resistance R 7, R8, and the one end being connected with resistance R 8 from described resistance R 7 is drawn a line and is connected with a capacitor C 3, the other end ground connection of capacitor C 3.
Further, the first branch road described in Fig. 3 and the second branch road are respectively and connect the zener diode combination of a differential concatenation, the other end ground connection of described diode combinations.As shown in Figure 3, diode D1 and diode D2 oppositely form a diode combinations after serial connection, and one end of this diode combinations is connected with the first branch road CAN_H, other end ground connection; Diode D3 and diode D4 oppositely form another diode combinations after serial connection, and one end of this diode combinations is connected with the second branch road CAN_L, other end ground connection.Described here this kind of preferred version, can effectively improve the stability of communication data transmission in circuit and can effectively eliminate the electrostatic interference in communication data, guarantees the particularity of communication data.
Closer, an electric capacity is gone back respectively and be connected to the first branch road described in Fig. 3 and the second branch road, the other end ground connection of electric capacity.The first branch road CAN_H is by capacitor C 2 ground connection, and the second branch road CAN_L is by capacitor C 4 ground connection, and the interfering signal of communication data described in this kind of further filtering of the plan of establishment has further guaranteed stability and the particularity of data transmission.
In Fig. 3, the one CAN transceiver 21 pin CANH and pin CANL are connected with CAN bus respectively by two articles of branch roads of signal control circuit, the one CAN transceiver is also electrically connected with entire car controller main control unit 10 with pin RXD by pin TXD, CAN communicating circuit described in the present embodiment is responsible for entire car controller and vehicle body control unit, engine management unit (has this unit on hybrid vehicle, pure electric automobile is without this element), data transmission communication between inline diagnosis unit and transmission control unit, a CAN transceiver 21 connects by signal control circuit CAN bus, CAN bus again with vehicle body control unit, engine management unit (has this unit on hybrid vehicle, pure electric automobile is without this element), inline diagnosis unit and transmission control unit are connected, entire car controller main control unit 10 is worked by CAN_TXD shown in Fig. 3 and two pin controls of CAN_RXD the one CAN transceiver 21, this transceiver is responsible for entire car controller and vehicle body control unit under the control of entire car controller main control unit 10, engine management unit (thering is this unit on hybrid vehicle), between inline diagnosis unit and transmission control unit, carry out data communication, and by signal control circuit, communication data is carried out to filter rectification processing.
Shown in Fig. 4, the structure of the signal control circuit shown in Fig. 4 is identical with the structure of signal control circuit in Fig. 3, the signal control circuit of this part also comprises two branch roads, Article 1, propping up route resistance R 12 and inductance L 3 serial connections forms, Article 2 props up route resistance R 13 and inductance L 4 serial connections form, and Article 1 branch road two ends connect respectively pin CANH and the CAN bus of the 2nd CAN transceiver 22, the two ends of Article 2 branch road connect respectively pin CANL and the CAN bus of the 2nd CAN transceiver 22.
Preferably, according to the set-up mode of the signal control circuit in Fig. 3, above-described Article 1 branch road is also connected to 60 Ω resistance R 16, capacitor C 5 and backward diode combination D5 and D6; Described Article 2 branch road is also connected to 60 Ω resistance R 17, capacitor C 7 and backward diode combination D7 and D8.
The CAN communicating circuit of embodiment shown in Fig. 4 is responsible for entire car controller and motor control unit, data transmission communication between battery management module unit, the 2nd CAN transceiver 22 is connected with CAN bus by signal control circuit, CAN bus again with motor control unit, battery management module unit is connected, entire car controller main control unit 10 is worked by CAN_TXD shown in Fig. 4 and two pin controls of CAN_RXD the 2nd CAN transceiver 22, this transceiver is responsible for entire car controller and motor control unit under the control of entire car controller main control unit 10, between battery management module unit, carry out data communication, and by signal control circuit, communication data is carried out to filter rectification processing.
Preferably, described the 2nd CAN transceiver 21 is also provided with pin
and pin EN, these two pins are electrically connected with entire car controller main control unit 10 respectively, and described the 2nd CAN transceiver 21 has four kinds of different mode of operations:
Normal mode: the 2nd CAN transceiver is in normal mode of operation, for CAN communication, be responsible for the data communication transmission of entire car controller and attached control unit 40, be converted into corresponding emulation bus signal from the digital bit stream of pin TXD input, the 2nd CAN transceiver 22 is monitored CAN bus simultaneously, converts the bus signals of simulation to corresponding digital bit stream and exports at RXD.By controlling pin
and pin EN input high level simultaneously, can control the 2nd CAN transceiver and enter this normal mode.
Only listen pattern: realize the performance of only listening.The 2nd CAN transceiver under this pattern only allows to receive message from CAN bus, does not allow to send message to CAN bus, and the digital bit stream of the 2nd CAN transceiver 21 on pin TXD is all left in the basket, and like this, can prevent that node from affecting CAN bus.By controlling pin
input high level, pin EN input low level just can be controlled the 2nd CAN transceiver and enter and only listen pattern.
Standby mode: the 2nd CAN transceiver 22 can reach low-power consumption under standby mode.Now the consumption of power of the 2nd CAN transceiver 22 is than normal mode or only listen under pattern and significantly decrease, the CAN message that the 2nd CAN transceiver 22 can not sending and receiving routine in standby mode, but the 2nd CAN transceiver 22 still can be monitored the CAN message in CAN bus.By controlling pin
input and pin EN input low level just can be controlled the 2nd CAN transceiver and enter standby mode.
Sleep pattern: the 2nd CAN transceiver 22 also can be realized low-power consumption under sleep pattern, current draw under this pattern with under standby mode, be consistent, but the pin INH of the 2nd CAN transceiver 22 is now in vacant state (under standby mode, this pin presents high level), can thoroughly turn-off and the contacting of outside, the 2nd CAN transceiver 22 under this pattern can not sending and receiving routine CAN message, can not monitor the CAN message in CAN bus.By controlling pin
input low level, pin EN input high level just can be controlled the 2nd CAN transceiver and enter sleep pattern.
Further, described sleep pattern starts by entering sleep commands, and it is mainly used for making the 2nd CAN transceiver 22 to enter sleep pattern, receives while entering sleep commands at the 2nd CAN transceiver 22, the 2nd CAN transceiver is disabled immediately, and then the 2nd CAN transceiver 22 enters sleep pattern.
Described the 2nd CAN transceiver 22 is also provided with pin WAKE and pin INH, described pin WAKE is connected with entire car controller main control unit 10 respectively with pin INH, described pin INH for waking entire car controller main control unit 10 up in the time receiving wake-up signal in CAN bus, and described WAKE pin sends wake-up signal wakes CAN transceiver for entire car controller main control unit 10 and enters normal mode by sleep pattern.Its specific works mode is as follows: in the time receiving wake-up signal in CAN bus, described pin INH is used for sending a high level and wakes entire car controller main control unit 10 up, and entire car controller main control unit 10 wakes CAN transceiver up to conversely wake-up signal of WAKE pin again and enters normal mode by sleep pattern.Under normal mode, the 2nd CAN transceiver 22 can transmit and receive data by bus CANH and CANL, and when entire car controller main control unit and the 2nd CAN transceiver 22 are simultaneously in sleep pattern time, if listen to a wake command in CAN bus, on the pin INH of the 2nd CAN transceiver 22, send a high level signal and wake entire car controller main control unit 10 up, entire car controller main control unit 10 sends wake command to the 2nd CAN transceiver 22 by pin WAKE again, make the 2nd CAN transceiver 22 enter normal mode by sleep pattern, now just can wake CAN communication controller up, realize communicating by letter between entire car controller and battery charger with this.This arousal function described in the present embodiment is mainly to keep for battery charger, for electronlmobil, need to utilize CAN to wake entire car controller up and charge to described electronlmobil in order to do interface with battery charger.
In addition, the structure 23 of the 3rd CAN transceiver 23 described in this enforcement is identical with the structure 22 of the 2nd CAN transceiver, also there is the function described in above-described embodiment and pin, the signal control circuit 33 that the 3rd CAN transceiver 23 connects is also identical with the structure of the signal control circuit being connected with the 2nd CAN transceiver 22 recited above, and the parameter setting of concrete components and parts can be determined according to the communication situation of concrete application.
The technical solution of the present invention, first aspect stability, compare with traditional CAN network service structure, can effectively improve the data volume of communication, make the communication rapid and convenient more between the attached control unit 40 on entire car controller and electronlmobil, and for the following function that will increase has been reserved port, the upgrade cost after effectively reducing in development process.
Secondly on circuit is realized, introduce inductance and eliminate common-mode signal interference, improved the stability of signal transmission in CAN bus, and in bus, adopted zener diode combination, further improved the stability of bus.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the communicating circuit used for electric vehicle based on CAN bus, is characterized in that: the signal control circuit that described communicating circuit used for electric vehicle comprises CAN transceiver and is electrically connected with CAN transceiver;
CAN transceiver, for transmitting the communication data between entire car controller main control unit and the attached control unit of electronlmobil;
Signal control circuit, for to described communication data rectifying and wave-filtering, the interfering signal in filtering communication data;
Described CAN transceiver at least comprises not the CAN transceiver with arousal function and a 2nd CAN transceiver with arousal function, a described CAN transceiver is connected with a signal control circuit respectively with the 2nd CAN transceiver, is respectively used to transmit the communication data between entire car controller main control unit and attached control unit.
2. the communicating circuit used for electric vehicle based on CAN bus according to claim 1, it is characterized in that, described each signal control circuit comprises that two are connected in series by resistance and inductance the first branch road and the second branch road that form respectively, described first branch road one end is for being connected with the pin CANH of CAN transceiver, described second branch road one end is for being connected with the pin CANL of CAN transceiver, and the other end of the first branch road and the second branch road is connected with CAN bus respectively.
3. the communicating circuit used for electric vehicle based on CAN bus according to claim 2, is characterized in that, respectively and connect a resistance, the other end of resistance passes through capacity earth for described the first branch road and the second branch road.
4. the communicating circuit used for electric vehicle based on CAN bus according to claim 3, is characterized in that, described the first branch road and the second branch road are respectively and connect the zener diode combination of a differential concatenation, the other end ground connection of described diode combinations.
5. the communicating circuit used for electric vehicle based on CAN bus according to claim 4, is characterized in that, described the first branch road and the second branch road are also respectively and be connected to an electric capacity, the other end ground connection of electric capacity.
6. the communicating circuit used for electric vehicle based on CAN bus according to claim 5, it is characterized in that, in the time that described electronlmobil is pure electric automobile, attached control unit on described automobile comprises vehicle body control unit, inline diagnosis unit and transmission control unit, the pin TXD of a described CAN transceiver, RXD is connected with entire car controller main control unit, pin CANH, CANL be connected with one end of two branch roads of signal control circuit respectively, the other end of described two branch roads is respectively by CAN bus and vehicle body control unit, inline diagnosis unit and transmission control unit are connected,
In the time that described electronlmobil is hybrid vehicle, attached control unit on described electronlmobil comprises vehicle body control unit, engine management unit, inline diagnosis unit and transmission control unit, pin TXD, the RXD of a described CAN transceiver is connected with entire car controller main control unit, pin CANH, CANL be connected with one end of two branch roads of signal control circuit respectively, the other end of described two branch roads is respectively by CAN bus and vehicle body control unit, and engine management unit, inline diagnosis unit and transmission control unit are connected.
7. the communicating circuit used for electric vehicle based on CAN bus according to claim 5, it is characterized in that, attached control unit on described electronlmobil also comprises motor control unit, battery management module unit, pin TXD, the RXD of described the 2nd CAN transceiver is connected with entire car controller main control unit, pin CANH, CANL be connected with one end of two branch roads of signal control circuit respectively, the other end of described two branch roads is respectively by CAN bus and motor control unit, and battery management module unit is connected.
8. the communicating circuit used for electric vehicle based on CAN bus according to claim 7, is characterized in that, described the 2nd CAN transceiver is also provided with the pin being electrically connected with entire car controller main control unit
and pin EN;
Work as pin
and pin EN is simultaneously when input high level signal, the 2nd CAN transceiver is in normal mode;
Work as pin
and pin EN is simultaneously when input low level signal, the 2nd CAN transceiver is in standby mode;
Work as pin
input high level signal, when pin EN input low level signal, the 2nd CAN transceiver is in only listening pattern;
Work as pin
the flat signal of input height, when pin EN input high level signal, the 2nd CAN transceiver is in sleep pattern.
9. the communicating circuit used for electric vehicle based on CAN bus according to claim 8, it is characterized in that, described the 2nd CAN transceiver is also provided with pin WAKE and pin INH, described pin WAKE is connected with entire car controller main control unit respectively with pin INH, described pin INH is for wake entire car controller main control unit up in the time receiving wake-up signal in CAN bus, and described WAKE pin sends wake-up signal wakes CAN transceiver for entire car controller main control unit and enters normal mode by sleep pattern.
10. the communicating circuit used for electric vehicle based on CAN bus according to claim 1, it is characterized in that, described CAN transceiver also comprises a 3rd CAN transceiver with arousal function, and described the 3rd CAN transceiver is electrically connected with entire car controller main control unit and a signal control circuit respectively.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106713097A (en) * | 2017-02-08 | 2017-05-24 | 广州致远电子股份有限公司 | CAN transmitting-receiving module |
| CN106945527A (en) * | 2017-03-20 | 2017-07-14 | 浙江农业商贸职业学院 | Communication coupled system and method between electric automobile |
| CN106961369A (en) * | 2017-03-20 | 2017-07-18 | 浙江工业职业技术学院 | Antitheft security system and method for electric automobile |
| CN106985688A (en) * | 2017-03-20 | 2017-07-28 | 浙江农业商贸职业学院 | Battery status monitoring system and method for electric automobile |
| CN108415404A (en) * | 2018-02-12 | 2018-08-17 | 南京越博动力系统股份有限公司 | Modular entire car controller power supply and interface circuit and its design method |
| CN110231783A (en) * | 2019-04-29 | 2019-09-13 | 东风商用车有限公司 | A kind of bus type DCM suspend mode quiescent current control system and control method |
| CN112822082A (en) * | 2021-01-11 | 2021-05-18 | 明峰医疗系统股份有限公司 | High-stability high-speed CAN communication method |
| CN114609999A (en) * | 2022-03-11 | 2022-06-10 | 格力博(江苏)股份有限公司 | Connecting structure for outdoor power equipment diagnosis and diagnosis equipment |
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| CN106713097A (en) * | 2017-02-08 | 2017-05-24 | 广州致远电子股份有限公司 | CAN transmitting-receiving module |
| CN106713097B (en) * | 2017-02-08 | 2022-07-29 | 广州致远电子股份有限公司 | CAN transceiver module |
| CN106945527A (en) * | 2017-03-20 | 2017-07-14 | 浙江农业商贸职业学院 | Communication coupled system and method between electric automobile |
| CN106961369A (en) * | 2017-03-20 | 2017-07-18 | 浙江工业职业技术学院 | Antitheft security system and method for electric automobile |
| CN106985688A (en) * | 2017-03-20 | 2017-07-28 | 浙江农业商贸职业学院 | Battery status monitoring system and method for electric automobile |
| CN108415404A (en) * | 2018-02-12 | 2018-08-17 | 南京越博动力系统股份有限公司 | Modular entire car controller power supply and interface circuit and its design method |
| CN110231783A (en) * | 2019-04-29 | 2019-09-13 | 东风商用车有限公司 | A kind of bus type DCM suspend mode quiescent current control system and control method |
| CN110231783B (en) * | 2019-04-29 | 2020-10-27 | 东风商用车有限公司 | Bus type DCM sleep quiescent current control system and control method |
| CN112822082A (en) * | 2021-01-11 | 2021-05-18 | 明峰医疗系统股份有限公司 | High-stability high-speed CAN communication method |
| CN114609999A (en) * | 2022-03-11 | 2022-06-10 | 格力博(江苏)股份有限公司 | Connecting structure for outdoor power equipment diagnosis and diagnosis equipment |
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