CN202995390U - Communication circuit used in electric vehicle based on CAN bus - Google Patents
Communication circuit used in electric vehicle based on CAN bus Download PDFInfo
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- CN202995390U CN202995390U CN2012205465533U CN201220546553U CN202995390U CN 202995390 U CN202995390 U CN 202995390U CN 2012205465533 U CN2012205465533 U CN 2012205465533U CN 201220546553 U CN201220546553 U CN 201220546553U CN 202995390 U CN202995390 U CN 202995390U
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Abstract
The utility model provides a communication circuit used in an electric vehicle based on a CAN bus. The communication circuit comprises CAN transceivers and signal control circuits electrically connected with the CAN transceivers. The CAN transceivers are used to transmit communication data between a vehicle control unit main control unit and affiliated control units of the electric vehicle. The signal control circuits are used for rectifying and filtering the communication data to remove interference signals in the communication data. The CAN transceivers at least comprise a first CAN transceiver without a wake-up function and a second CAN transceiver with the wake-up function. The first CAN transceiver and the second CAN transceiver are respectively connected with the signal control circuits. The technical scheme has good expandability, and can adapt to high-intensity and high-complexity communication requirements of the electric vehicles.
Description
Technical field
The utility model belongs to the electrical device of electric vehicle control field, relates in particular to a kind of equipment protecting equipment and method of work thereof of electric automobile.
Background technology
Present all kinds of microcontroller is more and more extensive in the application of field of automobile control, and the automotive electronics degree is more and more higher.For reducing costs and being connected the wire harness connection, the various bus control technologys of the numerous and confused employing of each automaker, reach the purpose that realizes real time data exchange complicated between the numerous electronic control unit of automobile, the CAN bus is one of topmost bus protocol wherein, transfer rate is high, cost is low and the characteristics such as reliable wrong processing and error-detection mechanism because it has, so very naturally be subject to widespread use in auto industry.
CAN communication network in present prior art on automobile, its network node mainly comprises control unit for automatic shift, engine electric spray control module, ABS system control unit, vehicle body control unit etc.Offered load is low; communication need is not high; one layer diagnosis subnet is only arranged; network topology structure is too single; extensibility is not strong; and on circuit is realized; existing communicating circuit on the CAN bus generally without any safeguard measure; in this case; when bus load increases, the pressure drop on bus and in the situation that signal-to-noise ratio is more serious, unsettled situation can appear in bus; and what this defective can embody when containing much information is more and more obvious, and the security of car load is had very large impact.Yet for the special-purpose field of electric automobile, its number of network node is more than the nodes of orthodox car, higher, stable than conventional vehicle body network speed, reliability requirement is stricter, integrated traditional sub-network, electronic sub-network (comprising pure electronic sub-network and hybrid power sub-network), demarcation, diagnosis sub-network are integrated simultaneously, and conventional CAN bus communication network is difficult to adapt to the high strength of electric automobile, the communication need of high complexity.
The utility model content
It is too single that the utility model is intended to solve in prior art the CAN communication network topology structure; extensibility is not strong; communicating circuit does not have the technical matters of protection, and a kind of used for electric vehicle communicating circuit based on the CAN bus is provided, and adapts to the communication need of electric automobile high strength, high complexity.
The utility model provides a kind of used for electric vehicle communicating circuit based on the CAN bus, described electric automobile comprises the attached control module on entire car controller main control unit and electric automobile, and described used for electric vehicle communicating circuit comprises CAN transceiver and the signal control circuit that is electrically connected to the CAN transceiver;
The CAN transceiver is used for the entire car controller main control unit of transmission electric automobile and the communication data between attached control module;
Signal control circuit is used for described communication data rectifying and wave-filtering, the undesired signal in the filtering communication data;
Described CAN transceiver comprises one at least not with a CAN transceiver and the 2nd a CAN transceiver with arousal function of 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 module.
Preferably, described each signal control circuit comprises two the first branch road and the second branch roads that are formed by resistance and inductance serial connection respectively, described the first branch road one end is used for being connected with the pin CANH of CAN transceiver, described the second branch road one end is used 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 the CAN bus respectively.
Preferably, described the first branch road and the second branch road respectively and connect a resistance, the other end of resistance passes through capacity earth.
Preferably, described the first branch road and the second branch road are respectively and connect the voltage stabilizing 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, when described electric automobile is pure electric automobile, attached control module 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 the entire car controller main control unit, pin CANH, CANL be connected with an 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 the CAN bus respectively;
When described electric automobile is hybrid vehicle, attached control module 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 the entire car controller main control unit, pin CANH, CANL be connected with an 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 module on described electric automobile also comprises motor control unit, the battery management module unit, pin TXD, the RXD of described the 2nd CAN transceiver is connected with the entire car controller main control unit, pin CANH, CANL be connected with an 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 the battery management module unit is connected.
Preferably, described the 2nd CAN transceiver also is provided with the pin that is electrically connected to the entire car controller main control unit
And pin EN; Work as pin
When reaching pin EN while input high level signal, the 2nd CAN transceiver is in normal mode; Work as pin
When reaching pin EN while input low level signal, the 2nd CAN transceiver is in standby mode; Work as pin
The input high level signal, during pin EN input low level signal, the 2nd CAN transceiver is in only listens pattern; Work as pin
The flat signal of input height, during pin EN input high level signal, the 2nd CAN transceiver is in sleep pattern.
Preferably, described the 2nd CAN transceiver also is provided with pin WAKE and pin INH, described pin WAKE is connected with the entire car controller main control unit respectively with pin INH, described pin INH is used for waking up the entire car controller main control unit when receiving wake-up signal on the CAN bus, described WAKE pin is used for entire car controller main control unit transmission wake-up signal wakes CAN transceiver and enters normal mode by sleep pattern.
Preferably, described CAN transceiver also comprises one with the 3rd CAN transceiver of arousal function, and described the 3rd CAN transceiver is electrically connected to entire car controller main control unit and a signal control circuit respectively.
The above technical scheme, be used for controlling entire car controller and carry out communication from attached control module on different electric automobile by increased at least two CAN transceivers in hybrid vehicle system, two CAN transceivers independently are electrically connected to entire car controller main control unit and a signal control circuit respectively, greatly improved the data volume of Full Vehicle System communication, the communication that makes other controllers on entire car controller and electric automobile is rapid and convenient more, has improved the performance that car load is controlled.And by the effective data undesired signal in the filtering communication process of signal control circuit, communicating circuit has been carried out effective protection, can adapt to the communication need of electric automobile high strength, high complexity.
Description of drawings
Fig. 1 is that the utility model is based on the module composition diagram of a kind of embodiment of used for electric vehicle communicating circuit of CAN bus;
Fig. 2 is that the utility model is based on used for electric vehicle communicating circuit communication connection diagram on electric automobile of CAN bus;
Fig. 3 be the utility model based on the used for electric vehicle communicating circuit of CAN bus not with the communicating circuit structural representation of arousal function;
Fig. 4 is that the utility model is based on the communicating circuit structural representation with arousal function of the used for electric vehicle communicating circuit of CAN bus.
Embodiment
Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the utility model provides a kind of used for electric vehicle communicating circuit based on the CAN bus, electric automobile described in the application refers to have the automobile of 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.The related electric automobile of the utility model comprises the attached control module 40 on entire car controller main control unit 10 and electric automobile, attached control module described here comprises other control modules on electric automobile except entire car controller, (has this unit on hybrid vehicle as vehicle body control unit, engine management unit, pure electric automobile is without this element), inline diagnosis unit, transmission control unit, motor control unit, battery management module unit etc.Described communicating circuit comprises CAN transceiver 20 and the signal control circuit 30 that is electrically connected to CAN transceiver 20, the communication data between the communication unit of communication is carried out in 20 two of the transmission of described CAN transceiver mutually, described signal control circuit 30 is used for described communication data being carried out rectifying and wave-filtering, the undesired signal of adulterating in the filtering communication data.
as shown in Figure 2, CAN transceiver 20 described in the utility model comprises one at least not with a CAN transceiver 21 and the 2nd a CAN transceiver 22 with arousal function of arousal function, a described CAN transceiver 21 is connected with a signal control circuit respectively with the 2nd CAN transceiver 22, namely 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 module 40.A described CAN transceiver 21 is used 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 used 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 module and the rear-guard motor control unit on electric automobile.
Further, CAN transceiver 20 of the present utility model comprises that also the 3rd CAN transceiver 23, the three CAN transceivers 23 that are used for being electrically connected to entire car controller main control unit 10 also are electrically connected to a signal control circuit.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 and the signal control circuit 31 that is connected with a CAN transceiver 20 and the 2nd CAN transceiver 22 respectively recited above, 32 structure are also identical.The 3rd CAN transceiver 23 described here is temporarily vacant, namely reserves this road CAN transceiver communicating circuit and is used for expansion, has increased dirigibility and the extensibility of system, for other hardware systems and the peripheral hardware upgrading of installing on following electric automobile provides convenient.
The communication broadband that the CAN of the two-way at least communicating circuit that the utility model above-described embodiment provides is worked simultaneously and can be provided larger, can complete communication task more complicated and that data volume is huge, not only realized being difficult to reach in traditional CAN communication network the demand of high speed communication on the performance of integral body, and the reliability of the CAN network that greatly improves by peripheral circuit, in order to the stability of tackling in electric automobile complex environment more and having improved CAN communication under the various rugged surroundings that electric automobile may run into.
Below, the utility model will form the concrete structure of each road CAN communicating circuit and function describes in detail one by one.
Described in conjunction with Fig. 3 and Fig. 4, signal control circuit of the present utility model comprises two the first branch road and the second branch roads that are formed by resistance and inductance serial connection respectively, described the first branch road one end is used for being connected with the pin CANH of CAN transceiver, described the second branch road one end is used 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 the 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 receives the communication data that on electric automobile, attached control module 40 sends and sends this communication data to the car load control module by these two branch roads, simultaneously first transceiver 21 receives communication data that the car load control modules send and sends this communication data on vehicle attached control module 40 by building two branch roads, described two branch roads can disturb in order to the common-mode signal in the filtering communication data by the combination setting of resistance and inductance, purify the communication data of attached control module 40 on entire car controller and electric automobile, guarantee high efficiency and the stability of communicating circuit work.
Preferably, the first branch road described in described Fig. 3 and the second branch road respectively and connect the resistance of 60 Ω, the other end of resistance passes through capacity earth.According to ISO11898, specified bus load in the CAN communicating circuit is 60 Ω, therefore the end of every CAN bus resistance of termination all, described resistance is preferably the resistance of 120 Ω, in order to improve the Electro Magnetic Compatibility of CAN high-speed bus system, be connected between two branch roads after mutually being connected in series with two 60 Ω resistance R 7, R8, and draw a line from the end that described resistance R 7 is connected with resistance R 8 and be 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 voltage stabilizing 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 an 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 an 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 the transmission of communication data in circuit and can effectively eliminate electrostatic interference in communication data, guarantees the accuracy of communication data.
A nearlyer step ground, 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 undesired signal of the described communication data of the further filtering of this kind plan of establishment has further guaranteed stability and the accuracy of data transmission.
in Fig. 3, the one CAN transceiver 21 pin CANH and pin CANL are connected with the CAN bus respectively by two branch roads of signal control circuit, the one CAN transceiver also is electrically connected to entire car controller main control unit 10 with pin RXD by pin TXD, the described CAN communicating circuit of the present embodiment is responsible for entire car controller and vehicle body control unit, the 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, namely a CAN transceiver 21 connects by signal control circuit CAN bus, the CAN bus again with vehicle body control unit, the 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 controlled CAN transceiver 21 job by CAN_TXD shown in Fig. 3 and two pins of CAN_RXD, 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 (having this unit on hybrid vehicle), carry out data communication between inline diagnosis unit and transmission control unit, and by signal control circuit, communication data is carried out filter rectification and process.
In conjunction with shown in Figure 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 one, propping up route resistance R 12 and inductance L 3 serial connections forms, second props up route resistance R 13 and inductance L 4 serial connections form, and article one branch road two ends connect respectively pin CANH and the CAN bus of the 2nd CAN transceiver 22, and the two ends of second 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 one branch road also is connected to 60 Ω resistance R 16, capacitor C 5 and backward dioded combination D5 and D6; Described second branch road also is connected to 60 Ω resistance R 17, capacitor C 7 and backward dioded 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 the battery management module unit, namely the 2nd CAN transceiver 22 is connected with the CAN bus by signal control circuit, the CAN bus again with motor control unit, the battery management module unit is connected, entire car controller main control unit 10 is controlled the 2nd CAN transceiver 22 work by CAN_TXD shown in Fig. 4 and two pins of CAN_RXD, this transceiver is responsible for entire car controller and motor control unit under the control of entire car controller main control unit 10, carry out data communication between the battery management module unit, and by signal control circuit, communication data is carried out filter rectification and process.
Preferably, described the 2nd CAN transceiver 21 also is provided with pin
And pin EN, these two pins are electrically connected to 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: namely the 2nd CAN transceiver is in normal mode of operation, be used for the CAN communication, be responsible for the data communication transmission of entire car controller and attached control module 40, be converted into corresponding emulation bus signal from the digital bit stream of pin TXD input, the 2nd CAN transceiver 22 monitoring CAN buses, convert the bus signals of simulating corresponding digital bit stream to and export at RXD simultaneously.By controlling pin
And pin EN while input high level, can control the 2nd CAN transceiver and enter this normal mode.
Only listen pattern: realize a performance of listening.The 2nd CAN transceiver under this pattern only allows to receive message from the CAN bus, does not allow to send message to the CAN bus, and the digital bit stream of the 2nd CAN transceiver 21 on pin TXD all is left in the basket, and like this, can prevent that node from affecting the 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.This moment the 2nd CAN transceiver 22 power consumption than normal mode or only listen under pattern and significantly decrease, the CAN message that the 2nd CAN transceiver 22 can not the sending and receiving routine in standby mode, but the 2nd CAN transceiver 22 still can be monitored the CAN message on the 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, consistent under current drain under this pattern and standby mode, but the pin INH of the 2nd CAN transceiver 22 is in vacant state (under standby mode, this pin presents high level) at this moment, can thoroughly turn-off and the contacting of outside, the 2nd CAN transceiver 22 under this pattern can not the sending and receiving routine the CAN message, can not monitor the CAN message on the 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 be used to making the 2nd CAN transceiver 22 enter sleep pattern, receives when 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 also is 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 is used for waking up entire car controller main control unit 10 when receiving wake-up signal on the CAN bus, described WAKE pin is used for entire car controller main control unit 10 transmission wake-up signal wakes CAN transceivers and enters normal mode by sleep pattern.Its specific works mode is as follows: when receiving wake-up signal on the 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 the CAN transceiver up for 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 in sleep pattern simultaneously, if listen to a wake command on the CAN bus, send a high level signal and wake entire car controller main control unit 10 up on the pin INH of the 2nd CAN transceiver 22, 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, just can wake the CAN communication controler up this moment, realize communicating by letter between entire car controller and charging set with this.This arousal function described in the present embodiment is mainly to keep for charging set, for electric automobile, need to utilize CAN to wake entire car controller up and charge to described electric automobile in order to do interface with charging set.
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 have 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 that is 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 scheme that the utility model is above-mentioned, at first aspect stable, 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 module 40 on entire car controller and electric automobile, and for the following function that will increase has been reserved port, the upgrade cost after effectively reducing in performance history.
Secondly on circuit is realized, introduce inductance and eliminate the common-mode signal interference, improved the stability of signal transmission on the CAN bus, and adopt the voltage stabilizing diode combination on bus, further improved the stability of bus.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. used for electric vehicle communicating circuit based on the CAN bus is characterized in that: described used for electric vehicle communicating circuit comprises CAN transceiver and the signal control circuit that is electrically connected to the CAN transceiver;
The CAN transceiver is used for the entire car controller main control unit of transmission electric automobile and the communication data between attached control module;
Signal control circuit is used for described communication data rectifying and wave-filtering, the undesired signal in the filtering communication data;
Described CAN transceiver comprises one at least not with a CAN transceiver and the 2nd a CAN transceiver with arousal function of 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 module.
2. the used for electric vehicle communicating circuit based on the CAN bus according to claim 1, it is characterized in that, described each signal control circuit comprises two the first branch road and the second branch roads that are formed by resistance and inductance serial connection respectively, described the first branch road one end is used for being connected with the pin CANH of CAN transceiver, described the second branch road one end is used 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 the CAN bus respectively.
3. the used for electric vehicle communicating circuit based on the CAN bus according to claim 2, is characterized in that, described the first branch road and the second branch road respectively and connect a resistance, the other end of resistance passes through capacity earth.
4. the used for electric vehicle communicating circuit based on the 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 voltage stabilizing diode combination of a differential concatenation, the other end ground connection of described diode combinations.
5. the used for electric vehicle communicating circuit based on the 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 used for electric vehicle communicating circuit based on the CAN bus according to claim 5, it is characterized in that, when described electric automobile is pure electric automobile, attached control module 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 the entire car controller main control unit, pin CANH, CANL be connected with an 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,
When described electric automobile is hybrid vehicle, attached control module on described electric 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 the entire car controller main control unit, pin CANH, CANL be connected with an 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 used for electric vehicle communicating circuit based on the CAN bus according to claim 5, it is characterized in that, attached control module on described electric automobile also comprises motor control unit, the battery management module unit, pin TXD, the RXD of described the 2nd CAN transceiver is connected with the entire car controller main control unit, pin CANH, CANL be connected with an 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 the battery management module unit is connected.
8. the used for electric vehicle communicating circuit based on the CAN bus according to claim 7, is characterized in that, described the 2nd CAN transceiver also is provided with the pin that is electrically connected to the entire car controller main control unit
And pin EN; Work as pin
When reaching pin EN while input high level signal, the 2nd CAN transceiver is in normal mode; Work as pin
When reaching pin EN while input low level signal, the 2nd CAN transceiver is in standby mode; Work as pin
The input high level signal, during pin EN input low level signal, the 2nd CAN transceiver is in only listens pattern; Work as pin
The flat signal of input height, during pin EN input high level signal, the 2nd CAN transceiver is in sleep pattern.
9. the used for electric vehicle communicating circuit based on the CAN bus according to claim 8, it is characterized in that, described the 2nd CAN transceiver also is provided with pin WAKE and pin INH, described pin WAKE is connected with the entire car controller main control unit respectively with pin INH, described pin INH is used for waking up the entire car controller main control unit when receiving wake-up signal on the CAN bus, described WAKE pin is used for entire car controller main control unit transmission wake-up signal wakes CAN transceiver and enters normal mode by sleep pattern.
10. the used for electric vehicle communicating circuit based on the CAN bus according to claim 1, it is characterized in that, described CAN transceiver also comprises one with the 3rd CAN transceiver of arousal function, and described the 3rd CAN transceiver is electrically connected to entire car controller main control unit and a signal control circuit respectively.
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| CN2012205465533U CN202995390U (en) | 2012-10-23 | 2012-10-23 | Communication circuit used in electric vehicle based on CAN bus |
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| CN2012205465533U CN202995390U (en) | 2012-10-23 | 2012-10-23 | Communication circuit used in electric vehicle based on CAN bus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103770728A (en) * | 2012-10-23 | 2014-05-07 | 广州汽车集团股份有限公司 | Communication circuit for electric vehicle based on CAN bus |
| US9517696B2 (en) | 2013-10-25 | 2016-12-13 | General Electric Company | Vehicle control system |
| CN106915326A (en) * | 2017-03-20 | 2017-07-04 | 浙江农业商贸职业学院 | Electronic vehicle attitude monitoring system and method based on sensor network |
| 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 |
| CN113126586A (en) * | 2019-12-30 | 2021-07-16 | 日立汽车***(苏州）有限公司 | Wake-up diagnostic device and wake-up diagnostic method |
-
2012
- 2012-10-23 CN CN2012205465533U patent/CN202995390U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103770728A (en) * | 2012-10-23 | 2014-05-07 | 广州汽车集团股份有限公司 | Communication circuit for electric vehicle based on CAN bus |
| CN103770728B (en) * | 2012-10-23 | 2016-04-27 | 广州汽车集团股份有限公司 | Based on the communicating circuit used for electric vehicle of CAN |
| US9517696B2 (en) | 2013-10-25 | 2016-12-13 | General Electric Company | Vehicle control system |
| CN106915326A (en) * | 2017-03-20 | 2017-07-04 | 浙江农业商贸职业学院 | Electronic vehicle attitude monitoring system and method based on sensor network |
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