CN113489158A - Low-voltage intelligent power distribution module - Google Patents
Low-voltage intelligent power distribution module Download PDFInfo
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- CN113489158A CN113489158A CN202110897739.7A CN202110897739A CN113489158A CN 113489158 A CN113489158 A CN 113489158A CN 202110897739 A CN202110897739 A CN 202110897739A CN 113489158 A CN113489158 A CN 113489158A
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- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 27
- 230000002265 prevention Effects 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 11
- 238000003745 diagnosis Methods 0.000 claims description 9
- 238000013021 overheating Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 230000001012 protector Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0084—Details of emergency protective circuit arrangements concerning transmission of signals by means of pilot wires or a telephone network; watching of these wires
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Computer Networks & Wireless Communication (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a low-voltage intelligent power distribution module which comprises an input circuit unit, a driving control circuit unit, a detection circuit unit, a communication circuit unit and an output circuit unit, wherein the input circuit unit is internally provided with an MOS (metal oxide semiconductor) switch and is used for switching and controlling a current protection threshold value arranged on an input circuit. Data such as electric current, voltage, temperature are passed to the display instrument of whole car through CAN communication circuit unit, simultaneously at input circuit, set up the overcurrent on output circuit and the PCB control panel, it is overheated, high temperature alarm, the safeguard of power-off protection and automatic failure prevention, rationally protect the battery, and with the battery of whole car or the mode of whole car power rational distribution to each electrical apparatus, thereby the distribution box function singleness among the current product has been solved, the unable effective protection of heavy current, and there is the potential safety hazard in the distribution box, the function integration degree is not high and CAN not automatic failure prevention and to the reasonable protection scheduling problem of battery.
Description
Technical Field
The invention relates to the technical field of power supply distribution of automobile circuits, in particular to a low-voltage intelligent power distribution module.
Background
At present, the low-voltage distribution box of the traditional automobile mainly comprises various fuses, various power relays, connectors, busbars, a shell body, an upper shell and other parts. Also, a novel low-voltage distribution box considers that an intelligent chip, various power switch modules and other electrical components are welded on a PCB (printed circuit board) to replace partial busbars, small-current fuses, relays and the like in the traditional low-voltage distribution box, but the basic principle of the low-voltage distribution box is that line connection is carried out according to a design principle diagram according to the power consumption requirement of the whole vehicle, low-voltage power consumption of the whole vehicle is supplied, and overcurrent protection, over-temperature protection and the like are provided.
However, with the increasing use of intelligent electronic products of automobiles and the increasing number of electric appliance products after automobiles, when the electric appliances added to the whole automobile get electricity from the low-voltage distribution box, the traditional low-voltage distribution box cannot judge the working importance grading degree of each electric appliance, and cannot actively and intelligently distribute the total current obtained from a storage battery or other whole automobile power supply systems according to needs, and when the power supply of the storage battery or other whole automobile power supply systems is insufficient or the number of working electric appliances is too large, part of important electric appliances cannot work normally.
The existing distribution box has no intelligent control function, CAN not transmit data such as current, voltage, temperature and the like to a display instrument through CAN communication, and also has no functions such as overcurrent, high-temperature alarm, power-off protection, automatic fault prevention, reasonable protection of a storage battery and the like.
Therefore, with the advance of electric and intelligent technologies, a new distribution box or a new distribution module is urgently needed to be invented to replace the old distribution box.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-voltage intelligent power distribution module to solve the problems in the prior art, an intelligent control system is established, data such as current, voltage, temperature and the like are transmitted to a display instrument of a finished automobile through a CAN communication circuit unit, meanwhile, overcurrent, overheating, high-temperature alarm, power-off protection and automatic fault-proof protection measures are arranged on an input circuit, an output circuit and a PCB control board to reasonably protect a storage battery, and the storage battery of the finished automobile or a power supply of the finished automobile is reasonably distributed to each electric appliance, so that the problems in the prior art are solved.
In order to achieve the purpose, the invention is realized by the following technical scheme: a low-voltage intelligent power distribution module comprises a PCB control panel, an input circuit unit, a drive control circuit unit, a detection circuit unit, a communication circuit unit and an output circuit unit which are respectively arranged on the PCB control panel,
the input circuit unit is connected with the drive control circuit unit through an input circuit;
the drive control circuit unit comprises an intelligent control chip and an output circuit power supply distribution unit respectively connected with the intelligent control chip through an output circuit, wherein,
the intelligent control chip is used for setting a control program, and the control program at least comprises an output circuit current protection threshold setting program and a protection program for detecting and judging overheating and overcurrent of circuits in the input circuit unit and the output circuit unit;
the output circuit power supply distribution unit is used for judging, dividing and switching the importance and power supply priority of the electrical appliances accessed to the output circuit channel;
the detection circuit unit is connected with the drive control circuit unit and is used for monitoring the load states of all the connected output circuits and the temperature rise data of the PCB control panel in real time;
the communication circuit unit is connected with the drive control circuit unit and used for establishing a signal transmission channel and feeding back a detection signal of the detection circuit unit to an external terminal;
and the output circuit unit is internally provided with an MOS switch and is used for switching and controlling a current protection threshold value arranged on the output circuit, and the output circuit unit is connected with the driving control circuit unit and is used for detecting overheating and overcurrent of a circuit output by the output circuit unit.
As an improvement to the low-voltage intelligent power distribution module in the present invention, the output circuit power supply distribution unit includes a current limiting unit, a self-recovery circuit power supply unit, and a power failure control unit, wherein,
the current limiting unit is used for carrying out current limiting power supply on an electric appliance connected to the output circuit;
the self-recovery circuit power supply unit is used for removing the current limiting or power-off state of the output circuit within the normal current value range and recovering power supply;
and the power-off control unit is used for executing the power-off instruction of the electrical appliance output by the intelligent control chip.
As an improvement of the low-voltage intelligent power distribution module, the PCB control board further comprises a failure prevention unit and a channel circuit control unit, wherein,
the fault-proof unit is used for ensuring that the output circuit can normally supply power when the intelligent control chip program cannot normally work;
and the channel circuit control unit is connected with the intelligent control chip and is provided with two control programs for executing a line switching control instruction of the intelligent control chip during self-detection of the fault.
As an improvement of the low-voltage intelligent power distribution module, the detection circuit unit comprises a current measurement unit, a circuit diagnosis unit, an early warning unit, an output circuit detection unit and a PCB control board temperature detection unit which are respectively connected with an intelligent control chip, wherein,
the current measuring unit is used for detecting the current of the built-in circuit of the low-voltage intelligent power distribution module;
the circuit diagnosis unit is used for detecting the fault state of the built-in circuit of the low-voltage intelligent power distribution module;
the early warning unit is used for outputting an early warning signal;
the output circuit detection unit is used for detecting the load state of the connected output circuit;
the PCB control board temperature detection unit is used for detecting the temperature rise state of the whole PCB control board.
As an improvement of the low-voltage intelligent power distribution module of the present invention, the output end of the output circuit unit is respectively connected with a load interface and a binding post interface, wherein,
the MOS switch is independently disconnected when the heavy current in any one path of the output circuit connected with the load interface or the terminal interface is overheated or overflows, and the output circuit is automatically restored to a path after the fault is eliminated.
In one possible implementation mode of the low-voltage intelligent power distribution module, the low-voltage intelligent power distribution module further comprises a display circuit unit connected with the driving control circuit unit, and the display circuit unit is used for visually detecting the load state and the early warning judgment signal monitored by the circuit unit through a communication circuit unit.
As an improvement of the low-voltage intelligent power distribution module, a CAN network communication circuit unit is arranged in the communication circuit unit and is connected with a CAN bus of the whole vehicle.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, an intelligent control system is established, data such as current, voltage, temperature and the like are transmitted to a display instrument of the whole vehicle through a CAN communication circuit unit, meanwhile, overcurrent, overheating, high-temperature alarm, power-off protection and automatic fault-prevention protection measures are arranged on an input circuit, an output circuit and a PCB control panel, the storage battery is reasonably protected, and the storage battery of the whole vehicle or the power supply of the whole vehicle is reasonably distributed to each electric appliance, so that the problems that the power distribution box in the existing product has single function and CAN not effectively protect large current, and the power distribution box has potential safety hazard, low function integration level, and CAN not automatically prevent faults and reasonably protect the storage battery are solved;
2. according to the invention, the power supply distribution unit of the output circuit is set up for the output circuit, the electrical appliances of the output circuit are divided into importance and power supply priority, and when the current input by the storage battery of the whole vehicle cannot meet the current requirements of all the electrical appliances at the same time, the priority is automatically distributed, so that the important electrical appliances are ensured to be powered preferentially; meanwhile, the mode of executing the power supply distribution instruction on the PCB control panel is set, so that when the temperature rise of the whole PCB control panel is detected to be too high, the importance and the power supply priority of the output channel with large current are divided, the output partial channels are broken, the processing measures of one-by-one or a plurality of broken channels are considered according to the practical use condition, the switching of control lines is carried out until the fault is eliminated, and the safety of important electric appliances of the whole vehicle is ensured.
Drawings
The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which like reference numerals are used to indicate like parts. Wherein:
fig. 1 is a schematic system structure diagram of a low-voltage intelligent power distribution module according to an embodiment of the present invention.
Detailed Description
It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
As shown in fig. 1, as an embodiment of the present invention, the present invention provides a technical solution: a low-voltage intelligent power distribution module comprises a PCB control panel, an input circuit unit, a drive control circuit unit, a detection circuit unit, a communication circuit unit and an output circuit unit which are respectively arranged on the PCB control panel, it CAN be understood that the invention establishes an intelligent control system, transmits data such as current, voltage, temperature and the like to a display instrument of the whole vehicle through the CAN communication circuit unit, meanwhile, overcurrent, overheating, high-temperature alarm, power-off protection and automatic fault-proof protection measures are arranged on the input circuit, the output circuit and the PCB control panel, the storage battery is reasonably protected, and the storage battery of the whole vehicle or the power supply of the whole vehicle is reasonably distributed to each electric appliance, therefore, the problems that the distribution box in the existing product has single function, large current cannot be effectively protected, the distribution box has potential safety hazard, low function integration level, and cannot automatically prevent failure and reasonably protect the storage battery are solved; but it should be noted that, instead,
the input circuit unit is internally provided with an MOS switch and is used for switching and controlling a current protection threshold value arranged on the input circuit, and when the input circuit unit is specifically implemented, according to the requirement of a whole vehicle, the input circuit unit can be provided with MOS switches corresponding to the protection threshold values by setting protection threshold values of different currents in a control program of an intelligent control chip;
the drive control circuit unit comprises an intelligent control chip, an output circuit power supply distribution unit and a PCB control panel power supply distribution unit, wherein the output circuit power supply distribution unit and the PCB control panel power supply distribution unit are respectively connected with the intelligent control chip through an output circuit; meanwhile, the mode of executing the power supply distribution instruction on the PCB control panel is set, so that when the temperature rise of the whole PCB control panel is detected to be too high, the importance and the power supply priority of the output channel with large current are divided, the output partial channels are broken, the processing measures of one-by-one or a plurality of broken channels are considered according to the practical use condition, the switching of control lines is carried out until the fault is eliminated, and the safety of important electric appliances of the whole vehicle is ensured
It should be noted that the intelligent control chip is used for setting a control program, and the control program at least comprises an output circuit current protection threshold setting program and a protection program for detecting and judging overheating and overcurrent of circuits in the input circuit unit and the output circuit unit, and when the intelligent control chip is specifically implemented, the intelligent control chip is installed on a PCB control board, controls the logic state of each circuit through a CAN communication circuit unit with the whole vehicle, and monitors signals of current, temperature state, fault prediction alarm, self-recovery fault and the like of a load carried by each circuit;
the output circuit power supply distribution unit is used for judging, dividing and switching the importance and power supply priority of the electrical appliances connected to the output circuit channel, and comprises a current limiting unit, a self-recovery circuit power supply unit and a power failure control unit, wherein,
the current limiting unit is used for carrying out current-limiting power supply on an electrical appliance connected to the output circuit;
the self-recovery circuit power supply unit is used for removing the current limiting or power-off state of the output circuit within the normal current value range and recovering power supply;
the power-off control unit is used for executing a power-off instruction of an electric appliance output by the intelligent control chip, and can be understood that before delivery, a control program is arranged in the intelligent control chip to divide the importance and power supply priority of the electric appliance connected to the output circuit, when the current input by the storage battery can not meet the current requirements of all the electric appliances at the same time, automatic distribution can be carried out according to the priority to ensure the priority power consumption of the important electric appliance and carry out current-limiting power supply on partial electric appliances, when the current requirement is reduced to a normal value, the low-voltage intelligent power distribution module carries out automatic recovery through the self-recovery circuit power supply unit, at the moment, the power-off control unit sends an instruction to remove current-limiting measures, thereby realizing the real intelligent distribution, the control flow of the self-defined intelligent control chip is the mode of firstly limiting current and then powering off, and then connecting the early warning unit through the power-off control unit, the alarm is given before the power failure is achieved, and the sent alarm or early warning signal is fed back to the CAN bus of the whole vehicle through a CAN network communication circuit unit arranged in the communication circuit unit and is transmitted to an instrument panel for displaying, wherein the displayed content information comprises image and character colors, alarm and buzzer prompt and other combined implementation information in various modes;
it should be noted that, after the warning or warning information signal performs warning output reminding, the warning information signal is upgraded to a power-off signal, and is still displayed and reminded on the instrument panel, and meanwhile, the signal is transmitted by combining various modes including image and text colors, warning buzzer sound reminding and the like, and it can be understood that the transmission mode is different from the transmission mode of the warning signal;
the power supply distribution unit of the PCB control board is used for dividing the importance and the power supply priority of the current channel in the output circuit, and the power supply distribution unit of the PCB control board is arranged on the PCB control board, and the PCB control board is also provided with a failure prevention unit and a channel circuit control unit, wherein,
the fault-proof unit is used for ensuring that the output circuit can normally supply power when the intelligent control chip program cannot normally work;
the channel circuit control unit is connected with the intelligent control chip and is provided with two control programs for executing a circuit switching control instruction of the intelligent control chip during self-detection of faults;
it CAN be understood that, when the temperature detecting unit of the PCB control board in the detecting circuit unit detects that the temperature of the whole PCB control board is too high, the intelligent control chip executes the instruction for dividing the importance of the output channel of the large current and the power supply priority, the power supply of the most important electrical appliance is preferentially ensured, other circuits CAN carry out judgment through the control strategy of the intelligent control chip and the heating real-time condition of each actual circuit channel, when the intelligent control chip judges that the next important output circuit channel needs to be cut off, the mode of alarming firstly and then cutting off power CAN be adopted, the display content of the intelligent control chip comprises the combination of image character color, alarm buzzer sound prompt and other modes to implement information, and meanwhile, the information is fed back to the whole vehicle CAN bus through the CAN network communication circuit unit built in the communication circuit unit and is transmitted to the instrument board to be displayed.
Meanwhile, it should be noted that the intelligent control chip after giving the alarm takes the following processing measures for the PCB control board: when the PCB control panel temperature detection unit detects that the temperature of the PCB control panel gradually recovers to a normal use range, the intelligent control chip controls the early warning unit, and the alarm is released; when the temperature detecting unit of the PCB control board detects that the temperature rising condition of the PCB control board is not improved and the set controllable range of the alarm threshold value is about to break through, the alarm is upgraded to the circuit channel of part of the circuit to be broken, and one or more alarms and the processing measures of breaking are considered according to the practical use condition.
The detection circuit unit is connected with the drive control circuit unit and used for monitoring the load states of all the access output circuits and the temperature rise data of the PCB control panel in real time, and the detection circuit unit CAN be used for monitoring the load states of all the access output circuit channels in real time by setting current measurement, diagnosis and early warning functions on the internal circuit of the low-voltage intelligent power distribution module, is connected with a CAN communication bus of the whole vehicle through the CAN network communication circuit unit, judges the monitored load states and early warning and displays the judged load states and early warning on a meter of the whole vehicle through analog signal conversion, and is convenient for a user to search, monitor and remind;
the communication circuit unit is connected with the drive control circuit unit and used for establishing a signal transmission channel to feed back a detection signal of the detection circuit unit to an external terminal, wherein the external terminal is a calculation terminal of the whole vehicle;
the output circuit unit is internally provided with an MOS switch and is used for switching and controlling a current protection threshold value arranged on the input circuit, and when the output circuit unit is specifically implemented, according to the requirement of the whole vehicle, the output circuit unit can be provided with MOS switches corresponding to the protection threshold values by setting protection threshold values of different currents in a control program of an intelligent control chip; output circuit unit connection drive control circuit unit, in order to be used for carrying on overheated to the circuit that output circuit unit exported, overcurrent detection, it needs to explain, output circuit unit has load interface and terminal interface through MOS pipe output connection respectively, wherein, load interface and terminal interface, be used for connecting external load, it can be understood that, the terminal interface is the heavy current terminal, circuit current more than or equal to 30A is the heavy current, and the terminal interface is provided with temperature sensor and the overheated protector that overflows of load, when concrete implementation, when overheated or when overflowing appears in any heavy current of output circuit with load interface or terminal interface connection, intelligent control chip control MOS switch breaks off alone, treat that the trouble eliminates the back, output circuit self-recovery passageway.
Based on the technical conception, the detection circuit unit comprises a current measurement unit, a circuit diagnosis unit, an early warning unit, an output circuit detection unit and a PCB control board temperature detection unit which are respectively connected with the intelligent control chip, wherein,
the current measuring unit is used for detecting the current of the built-in circuit of the low-voltage intelligent power distribution module; the circuit diagnosis unit is used for detecting the fault state of the built-in circuit of the low-voltage intelligent power distribution module; the early warning unit is used for outputting an early warning signal; the output circuit detection unit is used for detecting the load state of the connected output circuit; and the PCB control board temperature detection unit is used for detecting the temperature rise state of the whole PCB control board.
In an embodiment of the present invention, the display device further includes a display circuit unit connected to the driving control circuit unit, and the display circuit unit visualizes the load state and the early warning judgment signal monitored by the detection circuit unit through the communication circuit unit.
In an embodiment of the present invention, the input circuit unit, the driving control circuit unit, the detection circuit unit, the communication circuit unit, and the output circuit unit all include a converter for converting an analog signal into a digital signal.
Based on the technical concept, the low-voltage intelligent power distribution module can be installed in a novel power distribution box, the novel power distribution box comprises a shell, a PCB, at least one relay and a plurality of connecting aluminum bars, the relays are fixedly installed on the shell, the PCB is fixedly installed at the bottom of the shell, the shell is provided with a hollow structure, connecting terminals of the relays penetrate through the hollow structure of the shell and are connected with the aluminum bars in an inserting mode on corresponding connecting terminals of the PCB, and a low-voltage power distribution system of the whole vehicle is formed.
In an embodiment of the present invention, the specific implementation manner of the channel circuit control unit connecting to the intelligent control chip and setting two control programs for executing the power line switching control instruction of the intelligent control chip during the self-detection fault is as follows:
two paths of control are arranged on the PCB control board, when the intelligent control chip works normally, one path of control is in a dormant stage, when the intelligent control chip fails in self detection, a closing control instruction is sent out, a fault signal is sent out through the circuit diagnosis unit to mark a fault state, and at the moment, the other path of control is awakened by the fault signal of the intelligent control chip circuit to control an important power line so as to ensure the functions of important electrical appliances of the whole vehicle, thereby obtaining the dual guarantee of control power distribution;
when the fault of the intelligent control chip is relieved, the intelligent control chip recovers the self function after the self detection is qualified, and sends a signal of self recovery to normal through the circuit diagnosis unit, at the moment, the other path of controlled power line circuit is switched back to the control mode of the intelligent control chip, enters a dormant state and waits for awakening next time.
The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.
Claims (8)
1. The utility model provides a low pressure intelligence distribution module which characterized in that: comprises a PCB control panel, an input circuit unit, a drive control circuit unit, a detection circuit unit, a communication circuit unit and an output circuit unit which are respectively arranged on the PCB control panel,
the input circuit unit is connected with the drive control circuit unit through an input circuit;
the drive control circuit unit comprises an intelligent control chip and an output circuit power supply distribution unit respectively connected with the intelligent control chip through an output circuit, wherein,
the intelligent control chip is used for setting a control program, and the control program at least comprises an output circuit current protection threshold setting program and a protection program for detecting and judging overheating and overcurrent of circuits in the input circuit unit and the output circuit unit;
the output circuit power supply distribution unit is used for judging, dividing and switching the importance and power supply priority of the electrical appliances accessed to the output circuit channel;
the detection circuit unit is connected with the drive control circuit unit and is used for monitoring the load states of all the connected output circuits in real time and the temperature rise data of the output channel end on the PCB control board;
the communication circuit unit is connected with the drive control circuit unit and used for establishing a signal transmission channel and feeding back a detection signal of the detection circuit unit to an external terminal;
and the output circuit unit is internally provided with an MOS switch and is used for switching and controlling a current protection threshold value arranged on the output circuit, and the output circuit unit is connected with the driving control circuit unit and is used for detecting overheating and overcurrent of a circuit output by the output circuit unit.
2. A low voltage intelligent power distribution module according to claim 1, wherein: the output circuit power supply distribution unit comprises a current limiting unit, a self-recovery circuit power supply unit and a power failure control unit, wherein,
the current limiting unit is used for carrying out current limiting power supply on an electric appliance connected to the output circuit;
the self-recovery circuit power supply unit is used for removing the current limiting or power-off state of the output circuit within the normal current value range and recovering power supply;
and the power-off control unit is used for executing the power-off instruction of the electrical appliance output by the intelligent control chip.
3. A low voltage intelligent power distribution module according to claim 1, wherein: the PCB control board is also provided with a failure prevention unit and a channel circuit control unit, wherein,
the fault-proof unit is used for ensuring that the important output circuit can normally supply power when the intelligent control chip program cannot normally work;
and the channel circuit control unit is connected with the intelligent control chip and is provided with two control programs for executing a line switching control instruction of the intelligent control chip during self-detection of the fault.
4. A low voltage intelligent power distribution module according to claim 1, wherein: the detection circuit unit comprises a current measurement unit, a circuit diagnosis unit, an early warning unit, an output circuit detection unit and a PCB control board temperature detection unit which are respectively connected with the intelligent control chip,
the current measuring unit is used for detecting the current of the built-in circuit of the low-voltage intelligent power distribution module;
the circuit diagnosis unit is used for detecting the fault state of the built-in circuit of the low-voltage intelligent power distribution module;
the early warning unit is used for outputting an early warning signal;
the output circuit detection unit is used for detecting the load state of the connected output circuit;
the PCB control board temperature detection unit is used for detecting the temperature rise state of the whole PCB control board.
5. A low voltage intelligent power distribution module according to claim 1, wherein: the output end of the output circuit unit is respectively connected with a load interface and a binding post interface, wherein,
the MOS switch is independently disconnected when the current in any one path of an output circuit connected with the load interface or the terminal interface is overheated or overflows, and the output circuit is automatically restored to a path after the fault is eliminated.
6. A low voltage intelligent power distribution module according to claim 1, wherein: the display circuit unit is connected with the drive control circuit unit and visually detects the load state and the early warning judgment signal monitored by the circuit unit through the communication circuit unit.
7. A low voltage intelligent power distribution module according to claim 1, wherein: the communication circuit unit is internally provided with a CAN network communication circuit unit to be connected with a CAN bus of the whole vehicle.
8. A low voltage intelligent power distribution module according to claim 1, wherein: and the input circuit unit is internally provided with an MOS switch and is used for switching and controlling a current protection threshold value arranged on the input circuit.
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