CN105914730A - Vehicle-mounted-charger reverse connection prevention method - Google Patents

Vehicle-mounted-charger reverse connection prevention method Download PDF

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Publication number
CN105914730A
CN105914730A CN201610392982.2A CN201610392982A CN105914730A CN 105914730 A CN105914730 A CN 105914730A CN 201610392982 A CN201610392982 A CN 201610392982A CN 105914730 A CN105914730 A CN 105914730A
Authority
CN
China
Prior art keywords
relay
management system
battery management
vehicular charger
reverse connection
Prior art date
Application number
CN201610392982.2A
Other languages
Chinese (zh)
Inventor
冯倍茂
何佳健
伍健
韦杰宏
Original Assignee
东风柳州汽车有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东风柳州汽车有限公司 filed Critical 东风柳州汽车有限公司
Priority to CN201610392982.2A priority Critical patent/CN105914730A/en
Publication of CN105914730A publication Critical patent/CN105914730A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0034Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits

Abstract

The invention discloses a vehicle-mounted-charger reverse connection prevention method and belongs to the automobile manufacturing technology field. In the method, a reverse connection prevention circuit of a vehicle-mounted charger is used. The circuit comprises a branch formed through connecting in series a pre-charge resistor and a pre-charge relay. The reverse connection prevention method comprises the following steps that when receiving a charging command, a cell management system makes a first relay and the pre-charge relay simultaneously close; at this moment, the cell management system detects a voltage of two ends of the pre-charge resistor and compares a detected voltage value and a preset voltage scope value in predetermined time; if the detected voltage value exceeds the preset voltage scope value, a vehicle-mounted charger circuit is in a reversal connection state; and at this moment, the cell management system makes the pre-charge relay and the first relay disconnect. By using the method, problems that conduction losses of an existing vehicle-mounted charger reverse connection prevention circuit are large and a traditional reverse connection prevention circuit reduces whole machine efficiency can be solved.

Description

The anti-reverse method of Vehicular charger

Technical field

The present invention relates to field of automobile, especially a kind of anti-reverse method of Vehicular charger.

Background technology

nullVehicular charger refers to the charger being fixedly mounted on electric automobile,Have for electric automobile power battery,Safety、The most fully charged ability,A kind of Vehicular charger as shown in Figure 1,Include the charhing unit 11 electrically connected with battery management system 12,Charhing unit 11 has current rectifying and wave filtering circuit 121,The high voltage bus negative pole end HV-of current rectifying and wave filtering circuit 121 is connected by metal-oxide-semiconductor be followed by cell voltage positive pole with the second relay R L2 and first relay R L1 of battery management system 12,The high voltage bus positive terminal HV+ of current rectifying and wave filtering circuit 121 connects cell voltage negative pole,This Vehicular charger prevents the reversal connection of power supply by metal-oxide-semiconductor,And according to the data of battery management system BMS offer,Dynamic regulation charging current or voltage parameter,Perform corresponding action,Complete charging process;Owing to metal-oxide-semiconductor internal resistance is relatively big, therefore there is conduction loss and greatly thus reduce the problem that overall efficiency is low.

Summary of the invention

The technical problem to be solved is to provide a kind of anti-reverse method of Vehicular charger, and this charger can solve the problem that existing Vehicular charger reverse-connection preventing circuit conduction loss is big and traditional reverse-connection preventing circuit reduces overall efficiency.

In order to solve the problems referred to above, the technical solution adopted in the present invention is: the anti-reverse method of this Vehicular charger, use the reverse-connection preventing circuit of a kind of Vehicular charger, the branch road that described reverse-connection preventing circuit includes preliminary filling resistance and preliminary filling relay is connected in series to be constituted, after described branch road is in parallel with the second relay R L2 of Vehicular charger battery management system, connecting with the first relay R L1 of described battery management system and be followed by cell voltage positive pole in its one end, its other end is connected with the high voltage bus negative pole end of Vehicular charger current rectifying and wave filtering circuit;

Its anti-reverse method is as follows:

When battery management system receives charge command, control the first relay and preliminary filling relay is closed at, now, battery management system detection preliminary filling resistance both end voltage, and in the given time by the magnitude of voltage that detects compared with predetermined voltage range value, if the magnitude of voltage detected is beyond predetermined voltage range value, then Vehicular charger circuit reversal connection situation occurs, now, battery management system i.e. controls preliminary filling relay and the first relay disconnects.

Owing to have employed technique scheme, the present invention compared with prior art has the advantages that

Due to a preliminary filling resistance in parallel on the second relay of battery management system and the branch road of preliminary filling relay series connection; eliminate anti-reverse metal-oxide-semiconductor and control unit thereof that Vehicular charger high voltage bus negative pole end connects; shorten the construction cycle of Vehicular charger; reduce cost, reduce volume; realize Vehicular charger high-tension circuit reverse connecting protection simultaneously and decrease the conduction loss that increase metal-oxide-semiconductor etc. brings, improve the overall efficiency of Vehicular charger.

Accompanying drawing explanation

Fig. 1 is existing Vehicular charger circuit theory diagrams.

Fig. 2 is the circuit theory diagrams of the embodiment of the present invention.

Detailed description of the invention

The invention will be further described for embodiment below in conjunction with the accompanying drawings:

The anti-reverse method of this Vehicular charger, use the reverse-connection preventing circuit of the Vehicular charger shown in a kind of Fig. 2, the branch road that this reverse-connection preventing circuit includes preliminary filling resistance R and preliminary filling relay R L3 is connected in series to be constituted, after this branch road is in parallel with the second relay R L2 of Vehicular charger battery management system 1, connecting with the first relay R L1 of battery management system 1 and be followed by cell voltage positive pole Vbat+ in its one end, its other end is connected with the high voltage bus negative pole end HV-of the current rectifying and wave filtering circuit 21 of Vehicular charger 2;The high voltage bus positive terminal HV+ of current rectifying and wave filtering circuit 21 is connected with cell voltage negative pole Vbat-;

Its anti-reverse method is as follows:

Entire car controller sends charging instruction signal to battery management system 1, when battery management system 1 receives charge command, control the first relay R L1 and preliminary filling relay R L3 is closed at, now, battery management system detection preliminary filling resistance R both end voltage, and in the given time by the magnitude of voltage that detects compared with predetermined voltage range value, if the magnitude of voltage detected is beyond predetermined voltage range value, charger high-tension circuit reversal connection situation then occurs, now, battery management system 1 i.e. controls preliminary filling relay R L3 and the first relay R L1 disconnects, concurrently make mistake report, Vehicular charger internal component is made to obtain protection.

Claims (1)

1. the anti-reverse method of Vehicular charger, it is characterized in that: use the reverse-connection preventing circuit of a kind of Vehicular charger, the branch road that described reverse-connection preventing circuit includes preliminary filling resistance and preliminary filling relay is connected in series to be constituted, after described branch road is in parallel with second relay (RL2) of Vehicular charger battery management system, connecting with first relay (RL1) of described battery management system and be followed by cell voltage positive pole in its one end, its other end is connected with the high voltage bus negative pole end of Vehicular charger current rectifying and wave filtering circuit;
Its anti-reverse method is as follows:
When battery management system receives charge command, control the first relay and preliminary filling relay is closed at, now, battery management system detection preliminary filling resistance both end voltage, and in the given time by the magnitude of voltage that detects compared with predetermined voltage range value, if the magnitude of voltage detected is beyond predetermined voltage range value, be then Vehicular charger circuit reversal connection, now, battery management system i.e. controls preliminary filling relay and the first relay disconnects.
CN201610392982.2A 2016-06-06 2016-06-06 Vehicle-mounted-charger reverse connection prevention method CN105914730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610392982.2A CN105914730A (en) 2016-06-06 2016-06-06 Vehicle-mounted-charger reverse connection prevention method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610392982.2A CN105914730A (en) 2016-06-06 2016-06-06 Vehicle-mounted-charger reverse connection prevention method

Publications (1)

Publication Number Publication Date
CN105914730A true CN105914730A (en) 2016-08-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610392982.2A CN105914730A (en) 2016-06-06 2016-06-06 Vehicle-mounted-charger reverse connection prevention method

Country Status (1)

Country Link
CN (1) CN105914730A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109245251A (en) * 2018-12-13 2019-01-18 江苏万帮德和新能源科技股份有限公司 Reverse connecting protection system, direct-current charging post and working method
CN109391188A (en) * 2018-10-18 2019-02-26 深圳市优必选科技有限公司 It is a kind of for reducing the control circuit and device of direct current generator power spikes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101160686A (en) * 2005-04-25 2008-04-09 Lg化学株式会社 Battery pack management method for hev & ev
KR20140042540A (en) * 2012-09-28 2014-04-07 한국단자공업 주식회사 Electric vehicle and method for detecting status of pra pre-charge resistor in the same
CN104852415A (en) * 2014-06-17 2015-08-19 北汽福田汽车股份有限公司 Pre-charge process monitoring method and system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101160686A (en) * 2005-04-25 2008-04-09 Lg化学株式会社 Battery pack management method for hev & ev
KR20140042540A (en) * 2012-09-28 2014-04-07 한국단자공업 주식회사 Electric vehicle and method for detecting status of pra pre-charge resistor in the same
CN104852415A (en) * 2014-06-17 2015-08-19 北汽福田汽车股份有限公司 Pre-charge process monitoring method and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109391188A (en) * 2018-10-18 2019-02-26 深圳市优必选科技有限公司 It is a kind of for reducing the control circuit and device of direct current generator power spikes
CN109245251A (en) * 2018-12-13 2019-01-18 江苏万帮德和新能源科技股份有限公司 Reverse connecting protection system, direct-current charging post and working method

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Application publication date: 20160831