CN105137336B - Detect the diagnostic method of electric automobile high-voltage relay failure - Google Patents

Detect the diagnostic method of electric automobile high-voltage relay failure Download PDF

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Publication number
CN105137336B
CN105137336B CN201510456689.3A CN201510456689A CN105137336B CN 105137336 B CN105137336 B CN 105137336B CN 201510456689 A CN201510456689 A CN 201510456689A CN 105137336 B CN105137336 B CN 105137336B
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China
Prior art keywords
battery pack
electrical equipment
voltage
ends
relay
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Application number
CN201510456689.3A
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Chinese (zh)
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CN105137336A (en
Inventor
朱建新
王传杏
喜冠南
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南通大学
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Publication of CN105137336B publication Critical patent/CN105137336B/en

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Abstract

This application discloses the diagnostic circuits and diagnostic method of detection electric automobile high-voltage relay failure, include providing the battery pack of power supply and power for electric vehicle and controlling the controller of electric vehicle switch element break-make, the both ends of battery pack are connect with vehicle electrical equipment, connected main positive relay K+ between battery anode and vehicle electrical equipment, in the both ends of the positive relay K+ of master resistance R and pre-charge-relay Kp in parallel;Connected main negative relay K between the cathode of battery pack and vehicle electrical equipment;Battery pack and vehicle electrical equipment are connect with controller respectively, and controller is used to detect the voltage of the voltage at battery pack both ends, the voltage at vehicle electrical equipment both ends and battery pack negative terminal and vehicle electrical equipment anode.Peripheral circuit need not be added as a result, relay status only is judged to the cross detection of relay end voltage, can detect in time relay whether failure, convenient for adopting remedial measures in time, method is simple and feasible, and does not increase detection risk.

Description

Detect the diagnostic method of electric automobile high-voltage relay failure

Technical field

The present invention relates to the diagnosis of electric vehicle relay failure, more particularly to detection electric automobile high-voltage relay failure Diagnostic circuit and diagnostic method.

Background technology

Relay currently used for being used in electric automobile high-voltage power-on and power-off is generally divided into two kinds, and one is itself with anti- Contact is presented, another kind is without feedback contact.For with feedback contact generally by feedback signal come judge after The virtual condition of electric appliance, for the general virtual condition for not judging relay without feedback contact.And use these relays Major defect and deficiency:The feedback signal of system detectio relay judges generally by the I/O port of CPU.And traditional inspection Slowdown monitoring circuit and method are required for detection electric current and voltage, complex, and when detecting adhesion fault, possible accident has been sent out It is raw, timely remedial measure can not be made.

Invention content

The purpose of the invention is to provide detection electric automobile high-voltage relay failure diagnostic circuit and diagnostic method, It solves one or more of the above-mentioned prior art problem.

According to an aspect of the present invention, diagnostic circuit and the diagnosis side of detection electric automobile high-voltage relay failure are provided Method includes providing the battery pack of power supply and power for electric vehicle and controlling the controller of electric vehicle switch element break-make, Battery pack is equipped with anode and cathode, the both ends of battery pack are connect with vehicle electrical equipment, is electrically set in battery anode and vehicle Connected main positive relay K+ between standby, and at the both ends of the positive relay K+ of master, a series circuit, the series circuit in parallel have electricity Resistance R and pre-charge-relay Kp is composed in series;Connected main negative relay K- between the cathode of battery pack and vehicle electrical equipment; It is connect respectively with the IO of controller detection interfaces at the both ends of battery pack and the both ends of vehicle electrical equipment, controller is for detecting The electricity of the voltage at battery pack both ends, the voltage at vehicle electrical equipment both ends and battery pack negative terminal and vehicle electrical equipment anode Pressure.

In some embodiments:The controller is microcontroller.Thus, it is possible to the voltages in detection circuit.

The diagnostic method of diagnostic circuit according to detection electric automobile high-voltage relay failure, including following step are provided in addition Suddenly:

Step 1:Check K+, the voltage that microcontroller measures battery pack both ends is V1, and it is electrical with vehicle to measure battery pack negative terminal The voltage of equipment anode is V2, and it is V3 to measure the voltage at vehicle electrical equipment both ends, if V1-V2=0, K+ are adhesion Failure;If V1-V2 ≠ 0, K+ adhesion;

Step 2:Precharge is closed Kp, if V3 rises rapidly, K- is adhesion fault;If V3 does not change, K- is not Adhesion recloses K- at this time, into line precharge.

Step 3:It powers on, when precharge is completed, is closed K+, disconnects Kp, complete to power on, battery pack can electrically be set to vehicle Available electricity.

Step 4:Lower electricity, first disconnects K+, if V2 ≠ 0 and remaining unchanged at this time, Kp is adhesion fault;Otherwise, Kp is not Adhesion is then turned off K-, completes lower electricity.

The present invention need not add peripheral circuit, only judge relay status to the cross detection of relay end voltage, Can detect in time relay whether failure, convenient for adopting remedial measures in time, method is simple and feasible, and does not increase detection wind Danger.

Description of the drawings

Fig. 1 is the diagnostic circuit schematic diagram of present invention detection electric automobile high-voltage relay failure;

Fig. 2 is the flow chart of the diagnostic method of present invention detection electric vehicle relay failure.

Specific implementation mode

Illustrate below in conjunction with the accompanying drawings, invention is further described in detail.

As shown in Figure 1, the diagnostic circuit of detection electric automobile high-voltage relay failure, including provide power supply for electric vehicle With the battery pack of power and the controller of control electric vehicle relay on-off, battery pack is composed in series by multiple batteries, electricity Pond group is equipped with anode and cathode, the both ends of battery pack are connect with vehicle electrical equipment, provides power supply for vehicle electrical equipment and moves Can, wherein vehicle electrical equipment includes capacitance and electric appliance.

Connected a positive relay K of master for control circuit break-make between battery anode and vehicle electrical equipment +, while in one group of series circuit of the both ends of the positive relay K+ of master parallel connection, the series electrical routing resistance R and for controlling electricity The pre-charge-relay Kp of road break-make is composed in series.The master that connected between the cathode and vehicle electrical equipment of battery pack is negative Relay K-.

At the both ends of the positive and negative electrode of battery pack and the both ends of vehicle electrical equipment interface is detected with the IO of controller respectively Connection, controller pass through CAN bus real-time reception detection battery pack both end voltage, voltage, the Yi Ji electricity at vehicle electric equipment both ends The voltage of pond group negative terminal and vehicle electrical equipment anode, and corresponding operational order is made according to the voltage value of detection.

Wherein, controller is microcontroller.The voltage that controller detects battery pack both ends is V1, and it is negative that controller detects battery pack The voltage of end and vehicle electrical equipment anode is V2, and the voltage that controller detects vehicle electrical equipment both ends is V3.

In addition, as shown in Fig. 2, the diagnostic method of the diagnostic circuit based on detection electric automobile high-voltage relay failure, packet Include following steps,

Step 1:Check K+, the voltage that microcontroller measures battery pack both ends is V1, and it is electrical with vehicle to measure battery pack negative terminal The voltage of equipment anode is V2, and it is V3 to measure the voltage at vehicle electrical equipment both ends.If V1-V2=0 at this time, K+ are Adhesion fault.If V1-V2 ≠ 0, K+ adhesion.

As a result, before powering on, can investigate one by one K+, K- whether be in adhesion fault, if breaking down, can in time into Row is repaired, and dangerous generation will not be caused.

Step 2:Precharge is closed Kp, if V3 rises rapidly, K- is adhesion fault.If V3 does not change, that is, Saying that the capacitance in V3=0 or vehicle electrical equipment has electric power remaining, V3 keeps some voltage value constant, then K- adhesions, K- is reclosed at this time, and into line precharge, when pre-charge voltage reaches defined ratio, precharge is completed.

Step 3:It powers on, is closed K+, disconnect Kp, complete to power on, battery pack can be to vehicle power electrical apparatus.

Step 4:Lower electricity, first disconnects K+, if V2 ≠ 0 and remaining unchanged at this time, Kp is adhesion fault;Otherwise, Kp is not Adhesion, V2=0, is then turned off K- at this time, completes lower electricity..

In conclusion the present invention need not add peripheral circuit, only to the cross detection of relay end voltage come judge after Electrical appliance state, can detect in time relay whether failure, convenient for adopting remedial measures in time, method is simple and feasible, and not Increase detection risk.

The above is only one embodiment of the present invention, it is noted that those skilled in the art, Without departing from the concept of the premise of the invention, several similar modification and improvement can also be made, these also should be regarded as this Within the protection domain of invention.

Claims (1)

1. detecting the diagnostic method of the diagnostic circuit of electric automobile high-voltage relay failure, it is characterised in that:Include the following steps,
Step 1:Include the battery pack and control electric vehicle switch element break-make that power supply and power are provided for electric vehicle Controller, battery pack are equipped with anode and cathode, and the both ends of battery pack are connect with vehicle electrical equipment, in battery anode and vehicle Connected main positive relay K+ between electrical equipment, in the both ends of the positive relay K+ of a master series circuit in parallel, the series electrical Road has resistance R to be composed in series with pre-charge-relay Kp;Connected between the cathode of battery pack and vehicle electrical equipment it is main negative after Electric appliance K-;It is connect respectively with the IO of controller detection interfaces at the both ends of battery pack and the both ends of vehicle electrical equipment, it is described Controller is for detecting the voltage at battery pack both ends, the voltage at vehicle electrical equipment both ends and battery pack negative terminal and vehicle electricity The voltage of gas equipment anode, the controller are microcontroller;
Check K+, the voltage that microcontroller measures battery pack both ends is V1, measures battery pack negative terminal and vehicle electrical equipment anode Voltage is V2, and it is V3 to measure the voltage at vehicle electrical equipment both ends, if V1-V2=0, K+ are adhesion fault;If V1-V2 ≠ 0, then K+ adhesions;
Step 2:Precharge is closed Kp, if V3 rises rapidly, K- is adhesion fault;If V3 does not change, K- adhesions, K- is reclosed at this time, into line precharge;
Step 3:It powers on, when precharge is completed, is closed K+, disconnects Kp, complete to power on, battery pack can be supplied to vehicle electrical equipment Electricity;
Step 4:Lower electricity, first disconnects K+, if V2 ≠ 0 and remaining unchanged at this time, Kp is adhesion fault;Otherwise, Kp is adhesion, It is then turned off K-, completes lower electricity.
CN201510456689.3A 2015-07-29 2015-07-29 Detect the diagnostic method of electric automobile high-voltage relay failure CN105137336B (en)

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CN105137336B true CN105137336B (en) 2018-07-24

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* Cited by examiner, † Cited by third party
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CN105966250B (en) * 2016-07-21 2018-05-18 合肥威博尔汽车技术有限公司 A kind of low-speed electronic automobile high pressure powers on management method
CN106159878A (en) * 2016-08-05 2016-11-23 成都新泰高科技术有限公司 A kind of relay load short circuits, broken circuit detection circuit
CN107991603A (en) * 2016-10-26 2018-05-04 宁德时代新能源科技股份有限公司 Relay diagnostic method and system
CN106501712B (en) * 2016-11-02 2019-05-14 天津市捷威动力工业有限公司 A kind of battery management system relay adhesion diagnostic method
CN106772002A (en) * 2016-11-30 2017-05-31 深圳市沃特玛电池有限公司 A kind of charge relay adhesion detection means
CN106772012B (en) * 2016-12-28 2020-02-14 惠州市蓝微新源技术有限公司 Relay fault diagnosis circuit and method
CN106772013B (en) * 2016-12-29 2019-08-06 北京经纬恒润科技有限公司 A kind of relay fault detection method and system
CN108267686A (en) * 2016-12-30 2018-07-10 微宏动力系统(湖州)有限公司 The relay adhesion detection method of battery pack system
CN106646216B (en) * 2017-01-22 2019-11-26 南京奥联新能源有限公司 The high-voltage relay state diagnostic apparatus and method of new-energy automobile
CN106908719A (en) * 2017-02-13 2017-06-30 上海蔚来汽车有限公司 The diagnostic system of vehicle DC charge relay
CN108802605A (en) * 2017-04-26 2018-11-13 宁德时代新能源科技股份有限公司 Relay adhesion detection method and system
CN107688146A (en) * 2017-07-28 2018-02-13 浙江吉利汽车有限公司 A kind of contactor condition detection method
CN107482591A (en) * 2017-08-01 2017-12-15 安徽欧鹏巴赫新能源科技有限公司 A kind of on-board high-voltage relay safety protecting method
CN107561436A (en) * 2017-09-26 2018-01-09 厦门金龙汽车新能源科技有限公司 A kind of relay adhesion detection method
CN108761324A (en) * 2018-06-15 2018-11-06 爱驰汽车有限公司 The diagnostic method and device of the high-voltage relay functional response failure of battery pack
CN109143048A (en) * 2018-07-23 2019-01-04 海马汽车有限公司 High tension loop relay adhesion diagnostic circuit and diagnostic method
CN109031111A (en) * 2018-08-10 2018-12-18 宁波吉利汽车研究开发有限公司 Relay status diagnostic circuit and power supply
CN109782159A (en) * 2019-02-25 2019-05-21 宁德时代新能源科技股份有限公司 High-voltage detecting circuit and its detection method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7557583B2 (en) * 2005-11-21 2009-07-07 Gm Global Technology Operations, Inc. System and method for monitoring an electrical power relay in a hybrid electric vehicle
CN104090229A (en) * 2014-06-11 2014-10-08 惠州市亿能电子有限公司 Multipath high-voltage relay output adhesion detection circuit and detection method
CN104155603A (en) * 2014-08-29 2014-11-19 一汽-大众汽车有限公司 Contact detection device and method of high-voltage relay for electric vehicle
CN104391241A (en) * 2014-10-13 2015-03-04 惠州市亿能电子有限公司 High-voltage relay state detection circuit of power battery and method thereof
CN104569799A (en) * 2013-10-24 2015-04-29 Ls产电株式会社 Apparatus and method for diagnosing malfunction of high voltage relay device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4510753B2 (en) * 2005-12-16 2010-07-28 パナソニックEvエナジー株式会社 Power supply device and control method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7557583B2 (en) * 2005-11-21 2009-07-07 Gm Global Technology Operations, Inc. System and method for monitoring an electrical power relay in a hybrid electric vehicle
CN104569799A (en) * 2013-10-24 2015-04-29 Ls产电株式会社 Apparatus and method for diagnosing malfunction of high voltage relay device
CN104090229A (en) * 2014-06-11 2014-10-08 惠州市亿能电子有限公司 Multipath high-voltage relay output adhesion detection circuit and detection method
CN104155603A (en) * 2014-08-29 2014-11-19 一汽-大众汽车有限公司 Contact detection device and method of high-voltage relay for electric vehicle
CN104391241A (en) * 2014-10-13 2015-03-04 惠州市亿能电子有限公司 High-voltage relay state detection circuit of power battery and method thereof

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