CN203037771U - Hybrid vehicle insulation monitoring device based on low-frequency signal - Google Patents

Hybrid vehicle insulation monitoring device based on low-frequency signal Download PDF

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Publication number
CN203037771U
CN203037771U CN 201220742618 CN201220742618U CN203037771U CN 203037771 U CN203037771 U CN 203037771U CN 201220742618 CN201220742618 CN 201220742618 CN 201220742618 U CN201220742618 U CN 201220742618U CN 203037771 U CN203037771 U CN 203037771U
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China
Prior art keywords
insulation
instrument
control cabinet
monitoring
voltage control
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Application number
CN 201220742618
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Chinese (zh)
Inventor
宋一中
王极品
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Shanghai Shenlong Bus Co Ltd
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Shanghai Shenlong Bus Co Ltd
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Priority to CN 201220742618 priority Critical patent/CN203037771U/en
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Publication of CN203037771U publication Critical patent/CN203037771U/en
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Abstract

The utility model relates to a hybrid vehicle insulation monitoring device based on a low-frequency signal. The hybrid vehicle comprises a high voltage system and a chassis. An insulation resistor is connected between the high voltage system and the chassis. The device is characterized in that the insulation monitoring device comprises a hybrid power vehicle controller, an insulation monitor, a high voltage control cabinet, a power supply and a bus instrument; the hybrid power vehicle controller is connected with the insulation monitor, the high voltage control cabinet and the bus instrument respectively; the power supply is connected with the insulation monitor and the high voltage control cabinet respectively; the insulation monitor and the insulation resistor are connected and form a measuring loop. Compared to the prior art, by using the device of the utility model, there are the following advantages that vehicle usage safety is guaranteed; performance is reliable and so on.

Description

PHEV insulation monitoring and warning device based on low frequency signal
Technical field
The utility model relates to a kind of monitoring device of electric vehicle, especially relates to a kind of PHEV insulation monitoring and warning device based on low frequency signal.
Background technology
Because the new forms of energy vehicle has all increased electric drive system, car is the electromechanical integrated product of a complexity, and electrical system is the important component part of electric automobile.According to the difference of purposes, its electrical system is divided into low tension system and high-tension system usually.
The low tension system generally adopts direct current 12V or 24V power supply for vehicle central controller, electronic equipment, light and rain brush etc. provide electric energy.High-tension system provides electric energy for the high-power parts such as drive motor of vehicle, mainly is made up of electrical equipments such as power battery pack, supply convertor, motor controller and motor.The operating voltage of high-voltage system power battery pack generally all more than 200V, adopts the higher voltage standard, can reduce electrical equipment working current, reduce the weight of electrical equipment and car load.But higher operating voltage is had higher requirement to the insulating property between high-voltage electric system and the vehicle chassis.
For guaranteeing non-interference and car load security performance between hi-lo circuit, the high voltage component of new-energy automobile is installed and can be used insulating mounting technology, directly be not electrically connected between the high-tension system of new-energy automobile and the chassis, being to insulate between high pressure consumer and the chassis, is a kind of isolated neutral system.
The cable insulation medium of high direct voltage system is aging or be subjected to factor affecting such as wet environment all can cause decreasing insulating between high-voltage electric system and the vehicle chassis, positive source or negative wire will be by constituting loop of electric leakage between insulation course and the chassis, the vehicle chassis current potential is risen, influence the operate as normal of low-voltage electrical and electric machine controller, even jeopardize personal safety.
Existing insulating monitoring system generally adopts the busbar voltage method.The voltage between the forward and backward dc bus of measuring resistance and the electric chassis is incorporated in measurement into, can calculate the insulating resistance value of system.Though circuit is simple, it is unreliable to work, can not the response power inside battery short circuit fault over the ground.
Summary of the invention
The purpose of this utility model is exactly to provide a kind of vehicle that guarantees to use the PHEV insulation monitoring and warning device based on low frequency signal of safety, dependable performance for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of PHEV insulation monitoring and warning device based on low frequency signal, described motor vehicle driven by mixed power comprises high-tension system and chassis, be connected with insulation resistance between high-tension system and chassis, described insulation monitoring and warning device comprises the hybrid power entire car controller, the insulating monitoring instrument, the high voltage control cabinet, electrical source of power and field bus instrument, described hybrid power entire car controller connects the insulating monitoring instrument respectively, high voltage control cabinet and field bus instrument, described electrical source of power connects insulating monitoring instrument and high voltage control cabinet respectively, and described insulating monitoring instrument and insulation resistance connect and compose measures the loop.
Described insulating monitoring instrument is connected with the hybrid power entire car controller by the CAN communication bus with field bus instrument.
Described high voltage control cabinet is connected by the switching value signal wire with the hybrid power entire car controller.
Compared with prior art, the utlity model has following advantage:
(1) the utility model injects low-frequency ac signal between high-tension system and chassis, and low frequency signal is the size of adaptive system drain capacitance and insulation resistance automatically, the monitoring dependable performance;
(2) the utility model can effectively send and report to the police and cut off the electricity supply, and has guaranteed the safety of vehicle high-tension line.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: " _ _ _ _ _ _ _ _ _ _ " be electric wire, Be the CAN communication bus, Be the switching value signal wire.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.Present embodiment is that prerequisite is implemented with technical solutions of the utility model, provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment
As shown in Figure 1, a kind of PHEV insulation monitoring and warning device based on low frequency signal, described motor vehicle driven by mixed power comprises high-tension system and chassis, be connected with insulation resistance between high-tension system and chassis, described insulation monitoring and warning device comprises hybrid power entire car controller 1, insulating monitoring instrument 2, high voltage control cabinet 3, electrical source of power 5 and field bus instrument 4, described hybrid power entire car controller 1 connects insulating monitoring instrument 2 respectively, high voltage control cabinet 3 and field bus instrument 4, described electrical source of power 5 connects insulating monitoring instrument 2 and high voltage control cabinet 3 respectively, and described insulating monitoring instrument 2 connects and composes with insulation resistance and measures the loop.Described insulating monitoring instrument 2 is connected with hybrid power entire car controller 1 by the CAN communication bus with field bus instrument 4, and high voltage control cabinet 3 is connected by the switching value signal wire with hybrid power entire car controller 1.
Above-mentioned each parts of hybrid power insulation monitoring and warning device are selected for use as follows:
HECU: need to gather vehicle speed signal and numerous analog signals, require control system that higher processing speed is arranged, addressing capability, stronger EMC antijamming capability, Shen Long have selected for use the TMS320F28035 of TI as the controller master chip; The LM2575 of TI and LM1117 are as the power supply process chip; The CAN module has adopted the MCP2551 chip of little core.The pcb board connection and reasonable arrangement, power supply and ground wire arrange decoupling capacitor, and simulating signal and digital signal are handled altogether, and the whole vacant part of plate is covered copper increases antijamming capability.
Insulating monitoring instrument: HS-020-24.
High voltage control cabinet: GL-ZK3385-10.
Field bus instrument: HNS-ZB204.
The principle of work of above-mentioned hybrid power insulation monitoring and warning device is:
The inner square-wave signal (low-frequency ac signal) that produces a positive and negative symmetry of insulating monitoring instrument, and by the insulation resistance formation measurement loop between capacitance voltage monitoring line, 2 winding ground wires and high direct voltage system and the chassis, measure current in loop and can produce an insulation voltage at insulation resistance, this voltage signal is insulated the monitor collection, can draw the size of insulation resistance by computing.The insulating monitoring instrument is exported the insulating resistance value that calculates by the CAN interface.Insulation resistance is made as 2 grades of early warning value and alarming values.After hybrid power entire car controller (HECU) obtains insulation resistance information insulating resistance value is compared, when reaching early warning value, HECU sends signal to field bus instrument by the CAN communication bus, the field bus instrument display alarm information, and export buzzer warning simultaneously.When reaching alarming value, HECU sends signal to field bus instrument by the CAN communication bus, the field bus instrument display alarm information, and export buzzer warning simultaneously; Out-put supply shutoff signal (switching value signal) is to the high voltage control cabinet simultaneously for HECU in addition, and the cut-out main power circuit guarantees high-tension line safety.

Claims (3)

1. PHEV insulation monitoring and warning device based on low frequency signal, described motor vehicle driven by mixed power comprises high-tension system and chassis, be connected with insulation resistance between high-tension system and chassis, it is characterized in that, described insulation monitoring and warning device comprises the hybrid power entire car controller, the insulating monitoring instrument, the high voltage control cabinet, electrical source of power and field bus instrument, described hybrid power entire car controller connects the insulating monitoring instrument respectively, high voltage control cabinet and field bus instrument, described electrical source of power connects insulating monitoring instrument and high voltage control cabinet respectively, and described insulating monitoring instrument and insulation resistance connect and compose measures the loop.
2. a kind of PHEV insulation monitoring and warning device based on low frequency signal according to claim 1 is characterized in that, described insulating monitoring instrument is connected with the hybrid power entire car controller by the CAN communication bus with field bus instrument.
3. a kind of PHEV insulation monitoring and warning device based on low frequency signal according to claim 1 is characterized in that described high voltage control cabinet is connected by the switching value signal wire with the hybrid power entire car controller.
CN 201220742618 2012-12-28 2012-12-28 Hybrid vehicle insulation monitoring device based on low-frequency signal Active CN203037771U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220742618 CN203037771U (en) 2012-12-28 2012-12-28 Hybrid vehicle insulation monitoring device based on low-frequency signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220742618 CN203037771U (en) 2012-12-28 2012-12-28 Hybrid vehicle insulation monitoring device based on low-frequency signal

Publications (1)

Publication Number Publication Date
CN203037771U true CN203037771U (en) 2013-07-03

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CN 201220742618 Active CN203037771U (en) 2012-12-28 2012-12-28 Hybrid vehicle insulation monitoring device based on low-frequency signal

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103605056A (en) * 2013-11-20 2014-02-26 奇瑞汽车股份有限公司 High-voltage DC insulation monitoring device and electric automobile
CN103675628A (en) * 2013-12-26 2014-03-26 东风商用车有限公司 Electric vehicle high-voltage insulation monitoring and protecting system and application method thereof
CN107561364A (en) * 2016-07-01 2018-01-09 深圳市沃特玛电池有限公司 Cross one another insulation detecting method and system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103605056A (en) * 2013-11-20 2014-02-26 奇瑞汽车股份有限公司 High-voltage DC insulation monitoring device and electric automobile
CN103605056B (en) * 2013-11-20 2017-01-04 奇瑞新能源汽车技术有限公司 A kind of HVDC insulation monitoring and warning device and electric automobile
CN103675628A (en) * 2013-12-26 2014-03-26 东风商用车有限公司 Electric vehicle high-voltage insulation monitoring and protecting system and application method thereof
CN107561364A (en) * 2016-07-01 2018-01-09 深圳市沃特玛电池有限公司 Cross one another insulation detecting method and system

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