CN203198756U

CN203198756U - Monitoring and alarm device for electric car high-tension distribution system

Info

Publication number: CN203198756U
Application number: CN 201320187496
Authority: CN
Inventors: 陆凤忙
Original assignee: Hefei Guocheng New Energy Vehicle Technology Co Ltd
Current assignee: Hefei Guocheng New Energy Vehicle Technology Co Ltd
Priority date: 2013-04-15
Filing date: 2013-04-15
Publication date: 2013-09-18
Anticipated expiration: 2023-04-15

Abstract

The utility model relates to a monitoring and alarm device for an electric car high-tension distribution system, and relates to the technical field of electric car high-tension distribution systems. The monitoring and alarm device comprises a microprocessor, a self-checking circuit, a sampling circuit, an output circuit, a power supply, an auxiliary power supply and a bus interface, wherein the microprocessor is respectively connected with one end of the self-checking circuit, one end of the sampling circuit, one end of the output circuit, one end of the auxiliary power supply and one end of the bus interface; the power supply is respectively connected with the microprocessor and the auxiliary power supply; and the other end of the auxiliary power supply is connected with the other end of the sampling circuit. The monitoring and alarm device is small in occupied space, can detect and alarm the electric car high-tension distribution system in real time, can perform overcurrent protection during failure, can prepare to position fault points, is convenient to operate, and brings great convenience for maintenance.

Description

A kind of monitoring of electronlmobil high tension distribution system and warning device

Technical field

The utility model relates to electronlmobil high tension distribution system technical field, relates in particular to a kind of monitoring and warning device of electronlmobil high tension distribution system.

Background technology

Application along with electric vehicle engineering development and dynamic lithium battery; the lithium cell group of electronlmobil is composed in series by tens of extremely thousands of joint cells; voltage reaches several hectovolts; as the lithium cell group voltage of electronic big bus up to nearly 700 volts; high like this electrical voltage system has proposed higher designing requirement to the safety performance of car load; the distributing function of the high-pressure system of electronlmobil and distribution safety; and the safe handling that how to guarantee electronlmobil; zero failure has been used into a present primary difficult problem; though the lithium cell group management system has been introduced lithium cell safety management concept; but its behavior is machinery comparatively; only when lithium cell group fault takes place, the lithium cell group is protected, can not be protected the electric power system of car load and the safe handling of consumer.

The traditional electric automobile high tension distribution system; just the use of machinery high voltage connector; the high pressure insurance; high pressure to the power battery pack input is shunted; do not import fault early warning system; for the distribution safety guard-safeguard; judge accurately by the management system early warning information and to answer location of fault; the fault of how handling imminent fault or having taken place; and after taking place, fault can not protect the consumer of car load; can not carry out the actv. protection to maintainer, user of service's safety again, can not in time control fault deterioration etc.

The major defect of existing electronlmobil high tension distribution system is as follows:

1, logical what adopt is the monoplane structure design for unreasonable structure, the high voltage power distribution system that has now, makes the volume of high-tension distribution box very big like this, and positive and negative electric system is mingled in faults such as being easy to cause short circuit in the plane space.

2, car load high-pressure system fault is not had forewarning function, have only fault that the back car takes place and to have travelled, just known et out of order, failure analysis is lacked authentic data, follow-up improvement has been increased difficulty, and increased considerably after cost.

3, lack the means of communication of carrying out data exchange with the external world, there are not means of communications such as CAN bus that the failure message of car load switching arrangement and early warning information in time are reported on the car load instrument desk, allow chaufeur in time find, the withdraw from use vehicle keeps in repair vehicle.

4, be not easy to the trouble point that the maintainer in time finds high-pressure system, do not have the secondary safety control.

Summary of the invention

The purpose of this utility model provides a kind of monitoring and warning device of electronlmobil high tension distribution system; it takes up room little; can in real time the electronlmobil switching arrangement be detected and report to the police; when taking place, fault can carry out overcurrent protection; and can prepare the fault location point; be convenient to operation, give the very big facility of bringing of maintenance.

In order to solve existing problem in the background technology, the utility model is by the following technical solutions: it comprises microprocessor, self-checking circuit, sample circuit, output circuit, power supply, accessory feed, bus interface, described microprocessor connects self-checking circuit one end, sample circuit one end, output circuit one end, accessory feed one end, bus interface one end respectively, described power supply connects microprocessor and accessory feed respectively, and the accessory feed other end is connected with the sample circuit other end.

Another termination of described bus interface CAN bus.

The utility model is by following advantage:

1, this device adopts tridimensional structure for distribution, has dwindled the space of switch box, and it is easier in the layout of car load, simple to make, and it is big to have broken through conventional high-tension switch box volume, and it is big to take the car load space, is difficult to the bottleneck of taking root at car load.

2, distribution input, output series connection fuse; realize overcurrent, short-circuit protection function; introduced the high voltage connector of band secondary contact in this device, high-tension fuse is at high-pressure and overflowing; during short circuit; sample circuit can be gathered the switching value of each high voltage component, to determine the mode of operation of high voltage component, has protected the current consumer of high-pressure system to a certain extent; the very big facility of bringing of maintenance is given in trouble point that can the accurate in locating high voltage component.

3, can gather the switch box input voltage, detect the input and output voltage on every road, and can upload by the CAN bus, this device is by CAN bus communication mode, can with entire car controller, frequency converter, BMS, electric machine controller swap data, under the normal state of each parts self check, send out acknowledge signal to high-tension distribution box, begin after the high-tension distribution box self check to car load for distribution, guarantee that each system normally just can work, realize digitized communication, guaranteed the safety for distribution.

4, this device carries out instance analysis to each function device real time data, by the state of gathering each device and the information of putting forward of calculating each unit, and each module temperature variations, can estimate the car load high-pressure system may be with the fault that takes place, can before fault takes place, carry out early warning to fault, be convenient to the running state that the professional and technical personnel monitors car load in real time.

5, the direct and auto meter communication of the CAN bus of this device employing can directly be presented at failure message and be convenient to driver's observation above the instrument and find fault, on-call maintenance.

6, this device can detect HVDC input both positive and negative polarity to the insulation resistance of housing, realizes safety guard-safeguard, detects on the resistance to have self-checking function, and the insulation resistance state can be uploaded by the CAN bus, output action signal during the insulation resistance fault.

Description of drawings

Fig. 1 is structural representation of the present utility model.

The specific embodiment

Referring to Fig. 1, a kind of monitoring of electronlmobil high tension distribution system and warning device, it comprises microprocessor, self-checking circuit, sample circuit, output circuit, power supply, accessory feed, bus interface, described microprocessor connects self-checking circuit one end, sample circuit one end, output circuit one end, accessory feed one end, bus interface one end respectively, described power supply connects microprocessor and accessory feed respectively, and the accessory feed other end is connected with the sample circuit other end.

1, power-on self-test, after control desk powers on, at first carry out self check, produce the insulation resistance fault by the simulation of microprocessor control self-checking circuit, namely by resistance positive wire is connected car body, drive accessory feed output simultaneously and detect power supply, and be applied to positive source by K1, detect current value by current sensor A, sending processor AD thief hatch is sampled after sample circuit amplifies, and the calculating insulating resistance value, should be able to detect the insulation resistance fault, then self check is passed through, otherwise self check is not passed through, no matter self check is not by still passing through, and treater is cancelled the self-checking circuit artifical resistance automatically, and self check just often drives the output of self check normal condition, and upload the self check successful information by the CAN bus, otherwise, drive the output of self check faulty condition, upload not successful information of self check by the CAN bus.

2, system insulation detects, respectively accessory feed is applied in the positive pole and negative pole circuit of system power supply by K1, K2, and by DC current sensor detection loop current, give that treater is handled, computing, whether the decision-making system insulation resistance fault, just often drives the output of insulation resistance normal condition, and upload insulation resistance state normal information by the CAN bus, otherwise, drive the output of insulation resistance faulty condition, and upload insulation resistance status fault information by the CAN bus.

3, regularly patrol and examine, control desk regularly (per 30 minutes) carried out for second step and detects once, with the discovery Insulation Problems of guaranteeing that vehicle can be early in operational process.

4, power supply, power unit comprises control power supply and accessory feed two parts, during realization the control power supply directly by direct current input control power supply DC24V carry out providing behind the linear voltage stabilization+12V ,+5V and+3.3V, wherein+and the 12V power supply is for sample circuit, and+5V is for CAN bus usefulness, and+3.3V uses for treater, output circuit part usefulness+24V power drives, accessory feed adopts the DC/DC power module, realizes that DC24V is transformed to DC60V, provides the insulation testing circuit to use.

5, microprocessor selects for use 16 DSC chip 56F8037 of Freescale as the treater of monitor, resources such as CAN controller, 16 road ADC sampling channels that it is inner integrated.

6, bus interface, bus interface are selected the TJA1050T chip for use.

7, output circuit, output circuit adopt aerotron to drive the output of 24V coil relay, and indicating lamps output directly drives output with treater.

8, sample circuit, employing LM2904 amplifier carry out one-level and follow back amplification processing, deliver to processor A D thief hatch behind the amplifier output increase voltage clamping circuit and sample.

9, self-checking circuit adopts relay to drive analog insulation resistance and carries out being connected with system power supply is anodal, and self check finishes the back and breaks away from fully with system power supply.

10, DC current sensor.DC current sensor is selected the current sensor of rated current 50mA for use, and detecting loop coiling 40～100 circles on sensor electric current is amplified, to improve sampling precision.

Claims

1. the monitoring of an electronlmobil high tension distribution system and warning device, it is characterized in that, it comprises microprocessor, self-checking circuit, sample circuit, output circuit, power supply, accessory feed, bus interface, described microprocessor connects self-checking circuit one end, sample circuit one end, output circuit one end, accessory feed one end, bus interface one end respectively, described power supply connects microprocessor and accessory feed respectively, and the accessory feed other end is connected with the sample circuit other end.

2. the monitoring of electronlmobil high tension distribution system according to claim 1 and warning device is characterized in that, another termination of described bus interface CAN bus.