CN106597274B - A kind of contactor adhesion determination method - Google Patents
A kind of contactor adhesion determination method Download PDFInfo
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- CN106597274B CN106597274B CN201611249801.7A CN201611249801A CN106597274B CN 106597274 B CN106597274 B CN 106597274B CN 201611249801 A CN201611249801 A CN 201611249801A CN 106597274 B CN106597274 B CN 106597274B
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- contactor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
Abstract
The present invention relates to a kind of contactor adhesion determination methods, and by comparing the pressure difference of voltage after battery voltage and main negative contactor, the pressure difference of comparative cell group voltage and voltage after main positive contactor determines main negative contactor adhesion and main positive contactor adhesion.This method principle is simple, it is easy to accomplish, it does not need additionally to increase system burden, the voltage after only need to just contacting using the master of voltage, electric machine controller feedback after the battery voltage and main negative contactor of battery management system acquisition realizes that the quick adhesion of main negative contactor, main positive contactor determines.
Description
Technical field
The invention belongs to new energy electric motor vehicle technical fields, and in particular to a kind of contactor adhesion determination method.
Background technique
Currently, usually charging and discharging circuit is controlled using contactor in electric car application, as shown in Figure 1, its
In include: connect battery module the negative contactor K1 of master, for controlling battery module negative terminal；Main positive contactor K3, for controlling
Battery module anode；Preliminary filling contactor K4 is controlled for controlling battery module anode for preliminary filling；Trickle charge contactor K6, is used for
Control trickle charge charging anode；Fast charge contactor K5, for controlling fast charge charging anode；Also contacts device K2, for controlling heating
Circuit.These contactors in use, since overload, band carry switching, control coil power supply shakiness, contact abrasion etc.
Reason causes contactor adhesion, and battery management system is made to be unable to control contactor, and significant problem will be caused when serious.Therefore it needs
Above-mentioned contactor adhesion situation is judged using the information of its own, is avoided in battery management system power up
There is the case where contactor failure.
Summary of the invention
The object of the present invention is to provide a kind of contactor adhesion determination methods, cause electricity for solving probe of contactor adhesion
The problem of pond management system is unable to control contactor.
In order to solve the above technical problems, the present invention proposes a kind of contactor adhesion determination method, comprising the following steps:
1) battery voltage U1, the voltage U2 after main negative contactor, when the difference of battery voltage U1 and voltage U2 are small are acquired
When the first setting value, main negative contactor adhesion is determined；
2) the main negative contactor of closure, the voltage U3 after acquiring main positive contactor, when the difference of battery voltage U1 and voltage U3
When less than the second setting value, main positive contactor adhesion is determined.
Further, acquire charging and discharging circuit electric current I1, heating circuit electric current I2, when charging and discharging circuit electric current I1 be greater than 0,
And heating circuit electric current I2 be greater than 0 when, determine the adhesion of also contacts device.
Further, the voltage U4 after preliminary filling contactor is acquired, when the difference of battery voltage U1 and voltage U4 are less than third
When setting value, the adhesion of preliminary filling contactor is determined.
Further, the voltage U5 after fast charge contactor is acquired, when the difference of battery voltage U1 and voltage U5 are less than the 4th
When setting value, the adhesion of fast charge contactor is determined.
Further, the voltage U6 after trickle charge contactor is acquired, when the difference of battery voltage U1 and voltage U6 are less than the 5th
When setting value, the adhesion of trickle charge contactor is determined.
The beneficial effects of the present invention are: by comparing the pressure difference of voltage after battery voltage and main negative contactor, it is more electric
The pressure difference of voltage after pond group voltage and main positive contactor, determines main negative contactor adhesion and main positive contactor adhesion.This method is former
Reason is simple, easy to accomplish, does not need additionally to increase system burden, only need to using the battery voltage that battery management system acquires with
The master of voltage, electric machine controller feedback after main negative contactor just contact after voltage, realize main negative contactor, main positive contactor
Quick adhesion determine.
Detailed description of the invention
Fig. 1 is a kind of charging and discharging circuit of electric automobile power supply system；
Fig. 2 is contactor adhesion determination flow schematic diagram.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
A kind of embodiment of contactor adhesion determination method of the invention:
Battery voltage U1, the voltage U2 after main negative contactor are acquired, after battery voltage U1 and main negative contactor
When the difference of voltage U2 is less than the first setting value, main negative contactor adhesion is determined；Voltage U3 after the main positive contactor of acquisition, works as battery
When the difference of group voltage U1 and voltage U3 is less than the second setting value, main positive contactor adhesion is determined.
Specifically, a kind of charging and discharging circuit of electric automobile power supply system as shown in Figure 1, wherein power-supply system includes battery
Management system, battery module, electrical module and related harness, battery management system framework using master-slave mode, Distributed Design or
Unitary design.It is when battery management system uses master-slave architecture, i.e., main including master control administrative unit and from control unit
Control unit is responsible for battery data management, total voltage acquisition, charging and discharging currents acquisition, insulating monitoring, electric leakage monitoring, SOC/
SOH estimation, exception management, charge and discharge control strategy implement, relay control and heated current acquisition, are responsible for from control unit
Cell voltage, temperature acquisition, balanced management and relay control.
Battery module is carried out in groups by single battery by series-parallel system, using ternary battery or ferric phosphate lithium cell,
Heating device, all kinds of contactors, fuse are designed in battery module.Electrical module includes the high pressures such as D.C. contactor, fuse
Device, harness include high voltage power line, low pressure gathering line, control line, data telecommunication line etc..Battery management system real time monitoring electricity
Pond module, electrical module, and protection processing is carried out, it is communicated by CAN bus with charger, entire car controller.
When designing charging and discharging circuit, according to battery temperature rise demand under low temperature environment, the ptc heater of certain power is selected,
According to the also contacts device K2 of the power selection corresponding specification of ptc heater, in battery management system main control module relay control
In channel processed, corresponding control relay, main negative contactor K1, fast charge contactor K5, trickle charge contactor K6, also contacts are selected
Device K2, preliminary filling contactor K4.
After BMS is powered on, battery management system acquires two-way voltage: battery voltage U1, the main rear end negative contactor K1 voltage
U2 determines main negative contactor K1 adhesion as U1-U2 < 10V.Main anode voltage U3 after the main positive contact of electric machine controller acquisition,
The voltage value is occurred to battery management system by vehicle CAN for entire car controller, as U1-U3 < 10V, determines main positive contact
Device K3 adhesion.Then battery management system acquires charging and discharging currents I1 by Hall, acquires heating circuit electric current by current divider
I2 works as I1=I2, and when I1 > 0, or as I1 > I2 > 0, determines also contacts device K2, the main negative equal adhesion of contactor K1.Closure master
Negative contactor K1, battery management system receive the preliminary filling end voltage U4 after electric machine controller acquisition preliminary filling contactor K4, work as U1-U4
When < 10V, the K4 adhesion of preliminary filling contactor is determined.Fast charge charger acquires the fast charge end voltage U5 after fast charge contactor K5, is led to
Overcharge CAN is sent to battery management system, as U1-U5 < 10V, determines the K5 adhesion of fast charge contactor.Equally, battery management
System receives the trickle charge end voltage U6 after the trickle charge contactor K6 of trickle charge charger acquisition by charging CAN, as U1-U6 < 10V
When, determine the K6 adhesion of trickle charge contactor.
Request of data in the present embodiment between battery management system and charger uses CAN bus mechanism, CAN bus speed
Rate supports 10KBPS~1MBPS.
Claims (5)
1. a kind of contactor adhesion determination method, which comprises the following steps:
1) acquire battery voltage U1, the voltage U2 after main negative contactor and before other contactors, when battery voltage U1 with
When the difference of voltage U2 is less than the first setting value, main negative contactor adhesion is determined；
2) the main negative contactor of closure, the voltage U3 after acquiring main positive contactor, when the difference of battery voltage U1 and voltage U3 are less than
When the second setting value, main positive contactor adhesion is determined.
2. contactor adhesion determination method according to claim 1, which is characterized in that acquisition charging and discharging circuit electric current I1,
Heating circuit electric current I2 determines also contacts device when charging and discharging circuit electric current I1 is greater than 0, and heating circuit electric current I2 is greater than 0
Adhesion.
3. contactor adhesion determination method according to claim 1, which is characterized in that the voltage after acquisition preliminary filling contactor
U4 determines the adhesion of preliminary filling contactor when the difference of battery voltage U1 and voltage U4 are less than third setting value.
4. contactor adhesion determination method according to claim 1, which is characterized in that the voltage after acquisition fast charge contactor
U5 determines the adhesion of fast charge contactor when the difference of battery voltage U1 and voltage U5 are less than four setting values.
5. contactor adhesion determination method according to claim 1, which is characterized in that the voltage after acquisition trickle charge contactor
U6 determines the adhesion of trickle charge contactor when the difference of battery voltage U1 and voltage U6 are less than five setting values.
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| CN201611249801.7A CN106597274B (en) | 2016-12-29 | 2016-12-29 | A kind of contactor adhesion determination method |
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| CN201611249801.7A CN106597274B (en) | 2016-12-29 | 2016-12-29 | A kind of contactor adhesion determination method |
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| CN106597274A CN106597274A (en) | 2017-04-26 |
| CN106597274B true CN106597274B (en) | 2019-06-21 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884525B (en) * | 2017-12-01 | 2021-08-10 | 微宏动力系统（湖州）有限公司 | Adhesion detection device and method for battery pack contactor |
| CN108254682A (en) * | 2017-12-28 | 2018-07-06 | 长园深瑞继保自动化有限公司 | The method of discrimination of direct-current charging post output contactor adhesion fault |
| CN108790829A (en) * | 2018-07-23 | 2018-11-13 | 四川江淮汽车有限公司 | A kind of high voltage loop of electric automobile Detection & Controling circuit and detection method |
| CN109100645A (en) * | 2018-08-10 | 2018-12-28 | 浙江普朗特电动汽车有限公司 | A kind of electric automobile high-voltage distribution system contactor adhesion detection method and device |
| CN109849733B (en) * | 2019-02-19 | 2021-02-19 | 广州小鹏汽车科技有限公司 | Device and method for detecting and processing adhesion of high-voltage relay of electric vehicle |
| CN114113992B (en) * | 2020-08-25 | 2022-09-20 | 北汽福田汽车股份有限公司 | Power storage battery heating relay adhesion determining method and device and vehicle |
| CN116609665B (en) * | 2023-06-01 | 2024-03-19 | 沃尔特电子（苏州）有限公司 | Contactor adhesion detection method |
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| JP2012193984A (en) * | 2011-03-15 | 2012-10-11 | Toshiba Corp | Test method and test device of capacitor bank opening/closing performance |
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Effective date of registration: 20210713 Address after: 515000 11, building 8, science and Technology East Road, hi tech Zone, Shantou, Guangdong. Patentee after: GUANGDONG LEAWIN GROUP Co.,Ltd. Address before: No. 96, riverside north road, Hi-tech Zone, Luoyang, Henan Province Patentee before: LUOYANG POWIN INTELLIGENT CONTROL TECHNOLOGY Co.,Ltd. |