A kind of electric car block terminalTechnical field
A kind of automobile technical field of the present invention, and in particular to electric car block terminal.
Background technique
With the continuous development of automotive engineering, the electrical equipment on automobile is more and more, especially new-energy automobile, to protectEach electric appliance load electricity consumption on automobile is demonstrate,proved, block terminal is provided on automobile, the members such as relay, fuse is integrated in block terminalPart, the power distribution of each electric appliance load and circuit protection control on automobile.
In the prior art, New-energy electric vehicle high voltage distribution box is all pure electric automobiles, plug-in hybrid vapourThe high-voltage electricity high current allocation unit PDU of vehicle, mostly continues to use the design concept of industrial high-tension distribution box, safety, reliabilityIt all can not meet the requirement of automobile with durability, and the problems such as that there are volumes is big, integrated level is low, assembly is complicated.Specifically, existingHigh voltage distribution box uses bolt installing type relay, and installation and maintenance difficulty are big, and there are the wind that bolt torque decaying leads to overheatDanger；Installation footprint is big, and space utilization rate is not high；Low voltage control and high-voltage acquisition use harness connection type, traditional harnessCost of manufacture is high, and wiring difficulty is big, and arrangement harness cannot achieve automation technolo, and assembling production efficiency is low；Using conventional shuntDevice module carries out current sample, and shunt module internal resistance can be varied with temperature and be changed, current sample precision and current dividerModule internal resistance thermal stability is directly related, and shunt module temperature drift is big, causes current acquisition precision lower；Low current fuse oneAs be mounted on inside high voltage distribution box, maintenance difficulty is larger.
Summary of the invention
It is mentioned to solve high voltage distribution box installation and the big technical problem of maintenance difficulty, the embodiment of the present invention in the prior artA kind of electric car block terminal, including upper housing, lower case, multiple relays and PCB, the upper housing and the lower casing are gone outBody is fixedly connected, and the multiple relay is fixedly mounted on the upper housing, and the PCB is fixedly mounted in lower case, instituteUpper housing is stated with engraved structure, the engraved structure that the connection terminal of the multiple relay passes through the upper housing is plugged on instituteIt states on the corresponding connecting terminal of PCB.
Further, the PCB is the double-deck integrated morphology, including high pressure routing layer and low pressure routing layer；The high pressure cablingLayer is used for high-voltage great-current current-carrying, external cell input can be connected by copper bar and load exports；The low pressure routing layer is usedIt is transmitted in signal, signal transmission can be carried out by plate terminal adapter.
Further, the upper housing includes accommodation groove area, and there are multiple upper ends to open for the upper surface in the accommodation groove areaRelay accommodation groove, is respectively used to fixed the multiple relay of accommodating, and the engraved structure is arranged in each relay accommodation grooveBottom, the shell of each relay accommodation groove and the multiple relay is engaged by clamping.
Further, the multiple relay includes major loop relay, trickle charge relay and preliminary filling relay.
Further, the block terminal further includes low current fuse and preliminary filling resistance, and the upper surface in the accommodation groove area is alsoWith the open low current fuse accommodation groove in upper end and precharge resistance accommodation groove, it is respectively used to accommodate the low current fuseWith preliminary filling resistance, the engraved structure is additionally arranged at the bottom of low current fuse accommodation groove and precharge resistance accommodation groove.
Further, the multiple relay includes major loop relay, trickle charge relay and preliminary filling relay；The small electricityFlow fuse, major loop relay, trickle charge relay, preliminary filling relay and preliminary filling resistance connection terminal be blade inserting endSon, blade inserting terminal structure in the form of sheets, the connecting terminal on the PCB are resilient clamping structure.
Further, clamping groove or blocked hole are offered on opposite two wall of each relay accommodation groove, it is the multipleThe shell of relay position corresponding with the clamping groove or blocked hole is provided with outwardly projecting buckle；Each relayDevice accommodation groove is provided with installation guide frame, and the shell of the multiple relay is provided with leads with the installation of each relay accommodation grooveTo the corresponding guide frame of structure.
Further, the block terminal further includes major loop fuse, the first busbar connector, the second busbar connector and current divider mouldBlock, the major loop fuse, the first busbar connector and the second busbar connector are fixedly mounted in lower case, and the PCB passes through copper barMajor loop fuse is connected, major loop fuse is connect by the first busbar connector with shunt module, and shunt module can lead toIt crosses the second busbar connector and is connected to external cell；The upper housing further includes the upper cover region being connected with the accommodation groove area, it is described onCover region includes the recess portion of tabular upper cover and lower end opening downward, for covering the major loop fuse, the first remittanceStream row, the second busbar connector and shunt module.
Further, the major loop relay connection of monitoring major loop relay connection terminal temperature is provided on the PCBTerminal temperature sensor, and/or, the shunt module include current divider PCB and be arranged on current divider PCB for monitoringThe current divider temperature sensor of shunt module temperature.
Further, the copper bar is integrated on the pcb.
The embodiment of the present invention the utility model has the advantages that the preferred embodiment of the present invention propose electric car block terminal, using oneFormula PCB (printed circuit board) modularized design, improves the integrated level and reliability of product, and volume reduces, reduce assembly andMaintenance difficulty can automate mass production；It avoids major loop relay from overheating risk, improves the precision of current acquisition,Enhance overload-resistant load shock ability by force, improves the protection reliability that short trouble occurs.
Detailed description of the invention
Fig. 1 a is the electric car block terminal Structure explosion diagram that the embodiment of the present invention proposes；
Fig. 1 b is the electric car block terminal structural schematic diagram that the embodiment of the present invention proposes；
Fig. 1 c is the electric car block terminal assembling structure schematic diagram that the embodiment of the present invention proposes；
Fig. 2 is the PCB construction schematic diagram for the electric car block terminal that the embodiment of the present invention proposes；
Fig. 3 is the relay mounting structure schematic diagram for the electric car block terminal that the embodiment of the present invention proposes；
Fig. 4 is the low current fuse installation structure schematic diagram for the electric car block terminal that the embodiment of the present invention proposes；
Fig. 5 is the major loop relay connection terminal temperature sensor for the electric car block terminal that the embodiment of the present invention proposesMounting structure schematic diagram；
Fig. 6 is the shunt module structural schematic diagram for the electric car block terminal that the embodiment of the present invention proposes.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and referenceAttached drawing, the present invention is described in more detail.But as known to those skilled in the art, the invention is not limited to attached drawings and following realityApply example.
The embodiment of the present invention proposes a kind of electric car block terminal, including upper housing, lower case, multiple relays andPCB, the upper housing are fixedly connected with the lower case, and the multiple relay is fixedly mounted on the upper housing, describedPCB is fixedly mounted in lower case, and the upper housing has engraved structure, and the connection terminal of the multiple relay passes through describedThe engraved structure of upper housing is plugged on the corresponding connecting terminal of the PCB.
Specifically, a- Fig. 6, the electric car block terminal include upper housing 1, lower case 2, low current fusing referring to Fig.1Device 3, trickle charge relay 5, preliminary filling relay 6, preliminary filling resistance 7, PCB 8, major loop fuse 9, shunts major loop relay 4Device module 10.
Upper housing 1 is fixedly connected with lower case 2, such as passes through the fixation that is spirally connected.
The major loop relay 4, trickle charge relay 5 and preliminary filling relay 6 are fixedly mounted on upper housing；It is describedPCB 8, major loop fuse 9, the first busbar connector 11 and the second busbar connector 12 are fixedly mounted on the upper surface of lower case, pointStream 10 one end of device module is connected on the first busbar connector 11, and the other end is connected on the second busbar connector 12.The PCB 8 passes through copperRow's connection major loop fuse 9, major loop fuse 9 are connect by the first busbar connector 11 with shunt module 10, current divider mouldBlock 10 is connected by the second busbar connector 12 and external cell input.Preferably, the copper bar is integrated on the PCB 8.PCB8For integrated copper bar compared with the connection of traditional hard copper bar, installation convenience saves space.
The upper housing 1 includes accommodation groove area interconnected and upper cover region.
With relay the accommodation groove M, each relay accommodation groove M that multiple upper ends are open on the upper surface in the accommodation groove areaIt is respectively used to the fixed accommodating major loop relay 4, trickle charge relay 5 and preliminary filling relay 6.
The shell of each relay accommodation groove M and the major loop relay 4, trickle charge relay 5 and preliminary filling relay 6 canIt is engaged by clamping, for example, offering clamping groove or blocked hole 101, the master on opposite two wall of each relay accommodation groove MThe shell of circuit relay 4, trickle charge relay 5 and preliminary filling relay 6 position corresponding with the clamping groove or blocked hole 101It installs and is equipped with outwardly projecting buckle 102.
Also open with upper end low current fuse accommodation groove 30 and preliminary filling resistance on the upper surface in the accommodation groove areaAccommodation groove 70 is respectively used to accommodating low current fuse and preliminary filling resistance 7.
The bottom of each relay accommodation groove, low current fuse accommodation groove 30 and precharge resistance accommodation groove 70 all has hollow outStructure, the connection of the low current fuse 3, major loop relay 4, trickle charge relay 5, preliminary filling relay 6 and preliminary filling resistance 7Terminal 100 is electrically connected by each engraved structure with connecting terminal 200 corresponding on the PCB 8.
Preferably, each relay accommodation groove M is provided with installation guide frame, the major loop relay 4, trickle charge afterThe shell of electric appliance 5 and preliminary filling relay 6 is provided with guide frame corresponding with the installation guide frame of each relay accommodation groove M.
The upper cover region of the upper housing 1 includes the recess portion of tabular upper cover and lower end opening downward, for coveringThe major loop fuse 9, the first busbar connector 11 and the second busbar connector 12.
The low current fuse 3, major loop relay 4, trickle charge relay 5, preliminary filling relay 6 and preliminary filling resistance 7Connection terminal 100 and 200 plug connection of connecting terminal corresponding on the PCB 8.For example, the low current fuse 3, leading backRoad relay 4, trickle charge relay 5, preliminary filling relay 6 and preliminary filling resistance 7 connection terminal 100 be blade inserting terminal, it is describedBlade inserting terminal structure in the form of sheets, the connecting terminal 200 on the PCB 8 are resilient clamping structure, and each blade inserting terminal can be insertedIt connects on the PCB 8 on corresponding connecting terminal 200, is electrically connected to realize with the PCB 8.Low current fuse 7Connection terminal is set as blade inserting terminal, it can be achieved that Fast Installation and replacement, and in the prior art, low current fuse is usually adoptedIt is fixed by bolts to inside high voltage distribution box, maintenance difficulty is big, and there are torque decaying to cause contact resistance is excessive to cause for boltThe risk of overheat.
Preferably, the PCB 8 is the double-deck integrated morphology, including high pressure routing layer 81 and low pressure routing layer 82, the heightIt presses routing layer 81 to be used for high-voltage great-current current-carrying, external cell input is connected by copper bar and load exports, the low pressure cablingLayer 82 is transmitted for signal, carries out signal transmission by plate terminal adapter, for example, externally output current sampling resistor signal.PhaseThan traditional harness arrangement mode, assembly efficiency is improved, reduces wrong line risk, it can be achieved that Automated assembly.
Preferably, it is provided with major loop relay connection terminal temperature sensor 80 on the PCB 8, is led back for monitoringThe temperature of the connection terminal of road relay 4, the temperature sensor 80 are preferably NTC temperature sensor.When BMS discovery temperature is differentChang Shi and alarm can be avoided the overheat of major loop relay 4.
Preferably, the shunt module 10 includes current divider PCB 13 and the current divider being arranged on current divider PCB 13Temperature sensor 13, preferably NTC temperature sensor.Shunt module surface temperature is monitored using temperature sensor 13, is shuntedThe external output temperature resistance signal of device module 10, current sampling resistor signal, after BMS receives resistance signal, according to current dividerModule substrate TCR characteristic curve carries out temperature-compensating to the thermal resistance variation of the shunt module 10 of different temperatures, in conjunction with acquisitionVoltage-drop data, and then higher measurement accuracy is obtained, reduce the resistance value drift that temperature change generates.
More than, embodiments of the present invention are illustrated.But the present invention is not limited to above embodiment.It is allWithin the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the inventionWithin the scope of shield.