CN205281173U - Car intelligence relay box - Google Patents

Abstract

The utility model provides a car intelligence relay box, including singlechip, current detection module, relay control module, power module, alarm instruction module, the singlechip is the core in this system. Its control mode is: under each circumstances that the way relay does not transship or relay itself is trouble -free, the actuation of relay is controlled by outside switching signal totally, can arouse the current detection module singlechip of sending a signal when the electric current is too big, single chip microcomputer control disconnection relay reaches the whole car electrical safety's of protection purpose, breaking off the relay immediately perhaps when relay overstrain signal is received to the singlechip, but having a protection delay time that can set up, this value sets up to then not delay of zero hour. The utility model discloses an accurate control of car line current has realized electric current differentiated control of car power consumption and protection, divide into normal, warning and serious three rank, takes precautions against trouble in possible trouble accurate protection car circuit and consumer again simultaneously.

Description

Automobile intelligent relay box

Technical field

The utility model relates to automobile intelligent relay box, belongs to technical field of automobile electronic control.

Background technology

Traditional AUTOMOTIVE RELAY box is that the rly. wanted by automobile primary is arranged in a box together with safety fuse, by outside switch (key of such as lighting a fire) relay adhesive and disconnection, thus controls automobile electrical equipment and powers. Each road rly. connects safety fuse, and the effect of protection automobile electrical equipment is played in fuse burn-out when current is excessive. There are three big problems in traditional AUTOMOTIVE RELAY box use procedure: one be safety fuse is disposable, the dashboard taking-up of can only disassembling a car of the safety fuse of damage is changed again; Two is that safety fuse is only overload up to time circuit cannot bear and just can work, can not to automobile electrical failure prevention in possible trouble; Three is the impact owing to there is error and envrionment temperature in the quality of safety fuse or production process, and action of fuse electric current is inaccurate, does not sometimes have the effect of protection, causes automobile electrical equipment or wire harness to burn out or even self-burning of vehicle.

Along with the general advance of socioeconomic develop rapidly and science and technology, the develop rapidly of automobile cause, semiconductor transducer technology and microcontroller technology and people are to the further requirement of car safety. Vehicle current can be detected by high precision electric current transducer on the one hand, electric current can be carried out intelligent decision by microcontroller on the other hand. Therefore, the utility model proposes and a kind of can accurately monitor automobile electrical electric current simultaneously in conjunction with the automobile intelligent relay box of Control. Remind driving person to take precautions against in possible trouble when automobile line electric current is bigger; disconnect rly. when breaking down in time and disconnect the object reaching protection automobile electrical safety; automatically recover after Failure elimination and do not need to change any parts; each road current value and relay status data are sent to whole car network by CAN communication interface simultaneously, it is achieved data sharing.

Summary of the invention

Accurately monitor to realize automobile line electric current; realize automobile electrical current levels Management and Protection; it is divided into normal, warning and serious three ranks, takes precautions against fault and accurately protect again automobile line and electrical equipment in possible trouble simultaneously, the utility model proposes automobile intelligent relay box.

Automobile intelligent relay box described in the utility model, comprises micro-chip, current detection module, relay control module, power supply module,

Micro-chip comprises data processing module, timer input capture module, analog to digital conversion module, SPI communication interface module, switch signal acquisition module and CAN communication interface module,

Current detection module comprises current trigger comparison module and current sense module,

Relay control module comprises relay driving module and relay status detection module,

Micro-chip is the core in native system, timer input capture module wherein receives the signal from current trigger comparison module, SPI communication interface module sends instructions to current trigger comparison module, analog to digital conversion module receives from the signal of current sense module and relay status detection module, switch signal acquisition module gathers outside switch input, data processing module managing timer input capture module, analog to digital conversion module, SPI communication interface module, the data of switch signal acquisition module also output signal the adhesive of relay driving module relay, data processing module realizes the communication with whole car network by CAN communication interface module,

Power supply module, automobile 12V or 24V is powered and convert 5V to by this module is that micro-chip, current detection module are powered.

The utility model also comprises and also comprises warning indicating module, and data processing module shows current state prompting driving person by warning indicating module when a failure occurs. State is divided into normally, warns and serious three ranks, respectively with green, yellow, red indicating light instruction.

In the utility model, LM2596-5.0 is power supply module master control chip.

In the utility model, the model of micro-chip is MC9S12XS128MAL.

In the utility model, the control chip of current trigger comparison module is AD5611 and LM393. The control chip of relay driving module and warning indicating module is MC1413.

In the utility model, the current sense device chip of current sense module is ACS758LCB-050B.

The control process of automobile intelligent relay box described in the utility model: Shi Ge road rly. does not transship or when the trouble free of rly. own, the adhesive of rly. is controlled by outside switch signal completely. Current sense module detects the electric current of each road rly., and current trigger comparison module can be caused when current is excessive to transmit a signal to data processing module, and data processing module relay drives module disconnection rly. to reach the object protecting whole vehicle electric safety; Data processing module sends data to, by SPI communication interface module, the size that current trigger comparison module arranges current ratio and relatively trigger, thus the current value that rly. disconnects protection is arranged. Data processing module not necessarily disconnects rly. when receiving the signal of rly. overload immediately, but there is the protection time of lag that can arrange, and does not then postpone when this value is set to zero.

Useful effect: the utility model achieves automobile line electric current and accurately monitors, it is achieved that automobile electrical current levels Management and Protection, is divided into normal, warning and serious three ranks, takes precautions against fault and accurately protects again automobile line and electrical equipment in possible trouble simultaneously.

Accompanying drawing explanation

Fig. 1 is the utility model automobile intelligent relay box functional block diagram.

Fig. 2 is switch quantity acquisition circuit figure.

Fig. 3 is CAN communication interface circuit figure.

Fig. 4 is relay driving module schematic circuit.

Fig. 5 is relay status detection module schematic circuit.

Fig. 6 is current sense module circuit diagram.

Fig. 7 is current trigger comparison module schematic circuit.

Fig. 8 is warning indicating module schematic circuit.

Fig. 9 power module circuitry figure.

Embodiment

Embodiment one: present embodiment is described below in conjunction with Fig. 1-Fig. 3, all functions in the Fig. 1 that realize, the type selecting of micro-chip is especially important; The utility model selects Freescale automotive grade 16 micro-chip MC9S12XS128MAL. This microcontroller bus clock, up to 40MHZ, possesses the timer passage of 8 passage input capture functions, has 16 passage high precision 12 figure place mode convertion interfaces, possesses the input/output interface common more than 32 tunnels, is integrated with 1 tunnel CAN interface. Switch signal acquisition module gathers outside switch input by the switch quantity acquisition circuit of Fig. 2, and Fig. 2 circuit high level is effective, is then judged as that outside switch closes higher than 2.5V; Owing to have employed the design of backward diode, the highest collection voltage can reach 100V; When voltage input, lower than then thinking during 0.8V, outside switch does not close, and CAN communication interface module is connected with outside network or intelligent instrument by special purpose interface chip 82C250 in Fig. 3 and transmits data.

Embodiment two: present embodiment is described below in conjunction with Fig. 1, Fig. 4, Fig. 5, micro-chip, output pin be connected with the driving chip MC1413 in Fig. 4 drive rly. control coil, micro-chip export high level then relay closes, export lower level rly. disconnect. Relay status detection module is by the voltage of the detection relay output end of RI7 and RI8 dividing potential drop in Fig. 5, and transmits the signal to analog to digital conversion module; Relation between the detection voltage of rly. output voltage and relay status detection module meets formula

$Vj=\frac{RI7}{RI7+RI8}\×Vjout=\frac{2K}{20K+2K}\×Vjout=0.9091Vjout$

In formula, Vj is detection voltage, and Vjout is rly. output voltage.

If relay work, should be close with system power supply voltage according to the Vjout that upper formula is extrapolated by Vj during relay closes, rly. disconnects Vj and equals zero, therefore can by judging whether rly. has normal operation according to Vj.

Considering that the digital-to-analog conversion interface of micro-chip is limited, the utility model adopts simulation gating switch chip CD4051 that rly. output voltage is carried out dynamic sharing scanning.

Embodiment three: present embodiment is described below in conjunction with Fig. 1, Fig. 6, Fig. 7, current sense module, adopt the current sense device chip ACS758LCB-050B in Fig. 6, rly. outward current arrives electrical equipment through over-current sensor, current sense device exports and flows through electric current and be directly proportional the voltage signal of (60mV/A) and be sent to analog to digital conversion module, and voltage signal is converted into numerary signal transmission data processing module and calculates current electric current by analog to digital conversion module; The voltage signal that electric current is directly proportional that flows through sensed is sent to current trigger comparison module by current sense module simultaneously, current trigger comparison module adopts the voltage comparator chip LM2903 in Fig. 7, and the votage reference produced with analog-digital chip AD5611 compares; Under standard state, LM2903 exports lower level. When line current is excessive, the votage reference that the voltage signal that current sense module exports produces higher than AD5611, LM2903 exports high level to timer input capture module, and timer input capture module produces interruption event; Data processing module this interruption event control rly. that makes an immediate response disconnects and cuts off current circuit protection automobile line and electrical equipment, and owing to being adopt the processing mode interrupted, the utility model is extremely fast to the response speed of current overload; Data processing module not necessarily disconnects rly. when receiving the signal of rly. overload immediately; but there is the protection time of lag that can arrange; this value does not then postpone when being set to zero; user can connect CAN and send instructions to data processing module; data processing module arranges, by the chip AD5611 that SPI communication interface module sends data in current trigger comparison module, the size that current ratio relatively triggers, thus the current value that rly. disconnects protection is arranged.

Embodiment four: present embodiment is described below in conjunction with Fig. 1, Fig. 8, warning indicating module, the driving chip MC1413 in Fig. 8 is adopted to drive three pilot lamp green, yellow, red, it is connected with MC1413 by data processing module output pin, data processing module shows current state prompting driving person by warning indicating module when a failure occurs, state is divided into normally, warns and serious three ranks, respectively with green, yellow, red indicating light instruction.

Embodiment five: present embodiment is described below in conjunction with Fig. 1, Fig. 9, power supply module, adopt the efficient DC-DC conversion chip LM2596-5.0 in Fig. 9, for other module of the utility model provides the operating voltage of 5V, the maximum input voltage of LM2596-5.0 is 36V, and maximum output current is up to 3A; Power supply module adopts chip LM2596-5.0 to make the utility model be applicable to gasoline car (12V) and diesel vehicle (24V) simultaneously.

Claims (6)

1. an automobile intelligent relay box, it is characterised in that, it comprises micro-chip, current detection module, relay control module, power supply module,

Micro-chip comprises data processing module, timer input capture module, analog to digital conversion module, SPI communication interface module, switch signal acquisition module and CAN communication interface module,

Current detection module comprises current trigger comparison module and current sense module,

Relay control module comprises relay driving module and relay status detection module,

Micro-chip is the core in native system, timer input capture module wherein receives the signal from current trigger comparison module, SPI communication interface module sends instructions to current trigger comparison module, analog to digital conversion module receives from the signal of current sense module and relay status detection module, switch signal acquisition module gathers outside switch input, data processing module managing timer input capture module, analog to digital conversion module, SPI communication interface module, the data of switch signal acquisition module also output signal the adhesive of relay driving module relay, data processing module realizes the communication with whole car network by CAN communication interface module,

Automobile 12V or 24V is powered and converts 5V to by power supply module, for micro-chip, current detection module are powered.

2. automobile intelligent relay box according to claim 1, it is characterised in that, also comprise warning indicating module, when a failure occurs, data processing module shows current state by warning indicating module and reminds driving person; State is divided into normally, warns and serious three ranks, respectively with green, yellow, red indicating light instruction.

3. automobile intelligent relay box according to claim 1, it is characterised in that, LM2596-5.0 is power supply module master control chip.

4. automobile intelligent relay box according to claim 1 or 2 or 3, it is characterised in that, the model of micro-chip is MC9S12XS128MAL.

5. automobile intelligent relay box according to claim 1 or 2 or 3, it is characterised in that, the control chip of current trigger comparison module is AD5611 and LM393; The control chip of relay driving module and warning indicating module is MC1413.

6. automobile intelligent relay box according to claim 1 or 2 or 3, it is characterised in that, the current sense device chip of current sense module is ACS758LCB-050B.