CN207481815U - Electric system above and below electric automobile high-voltage - Google Patents

Electric system above and below electric automobile high-voltage Download PDF

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Publication number
CN207481815U
CN207481815U CN201721557824.4U CN201721557824U CN207481815U CN 207481815 U CN207481815 U CN 207481815U CN 201721557824 U CN201721557824 U CN 201721557824U CN 207481815 U CN207481815 U CN 207481815U
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contactor
voltage
total
negative
always
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CN201721557824.4U
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Inventor
陈西山
常乐
常东博
汪世伟
朱浩
王建辉
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Henan Senyuan Heavy Industry Co Ltd
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Henan Senyuan Heavy Industry Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

The utility model is related to electric systems above and below electric automobile high-voltage, after vehicle power on signal is received, in the case where preliminary filling contactor is closed, if the voltage of total positive contactor and total negative contactor close to load one end is more than the first setting value, always negative contactor adhesion fault is judged;After vehicle power on signal is received in total negative contactor fault-free and in the case that always negative contactor is closed, if the voltage of total positive contactor and total negative contactor close to load one end is more than the second setting value, total positive contactor adhesion fault is judged.Therefore, with reference to total positive contactor and the voltage of total close load one end of negative contactor, and by above-mentioned control process, it can accurately be diagnosed to be total positive contactor or always bear whether contactor adhesion fault occurs, and then ensure the reliable energy output of power battery.

Description

Electric system above and below electric automobile high-voltage
Technical field
The utility model is related to electric systems above and below electric automobile high-voltage, belong to electric automobile high-voltage system control field.
Background technology
Ability output circuit of the power battery as electric vehicle, energy export a series of break-make by high tension apparatus It realizes, the working condition of high tension apparatus, especially power battery anode high-voltage relay (total positive contactor) and negative terminal high pressure Whether normal break-make has exported highly important effect to relay (always bearing contactor) to the reliable energy of power battery, therefore, The working condition of power battery high-voltage relay and other associated high voltage devices must be detected, it still, at present can not be reliably Judge high-voltage relay whether failure, cause that high pressure can not be completed to power on flow or complete high pressure to power on flow, but without Method identifies the adhesion situation of high-voltage relay, and the situation of the irregular operating of these high-voltage relays is vehicle operation and maintenance band Carry out insecurity.Moreover, electric automobile high-voltage power-on and power-off flow, is controlled generally according to preset pre-charging time Electricity, lower electricity are first to disconnect total positive contactor, are then turned off always bearing contactor, not according to current detecting and discharge voltage detect into The lower electricity of row.Generally the flow powered on again is not also diagnosed first.
Utility model content
The purpose of this utility model is to provide electric automobile high-voltage, and electric system, the failure to realize high tension apparatus are examined up and down It is disconnected.
To achieve the above object, the utility model includes following technical scheme.
System schema one:This programme provides a kind of electric automobile high-voltage electric system up and down, including power battery and driven Power anode output positive output line road and from power battery cathode export negative output line road, positive output line road It goes here and there and is equipped with total positive contactor, one end for being used to connect power battery in total positive contactor is first end, in total positive contactor One end for connecting load is second end, and negative output line road, which is gone here and there, is equipped with always negative contactor, and total bear in contactor is used for One end of power battery is connected as first end, in total negative contactor is second end for connecting one end of load, it is described it is total just Contactor is parallel with a preliminary filling branch, and preliminary filling branch road string is equipped with preliminary filling resistance and preliminary filling contactor, and the system is also Including first voltage detection module and second voltage detection module, the first voltage detection module is used to detect total positive contactor The voltage of first end and total negative contactor first end, the second voltage detection module for detect total positive contactor second end and The voltage of total negative contactor second end.
There are two voltage detection module, first voltage detection module is used to detect total positive contactor and always bears contactor for setting Voltage close to one end of power battery, second voltage detection module are close negative for detecting always positive contactor and always negative contactor The voltage of one end of load is born according to positive contactor total in the voltage signal carry out system of the two voltage detection modules detection and always The fault diagnosis of the important high tension apparatus such as contactor.Therefore, it with reference to first voltage detection module and the second detection module, and combines Relevant control process can accurately be diagnosed to be total positive contactor or always whether negative contactor adhesion fault, Jin Erbao occurs Demonstrate,prove the reliable energy output of power battery.In addition, fault diagnosis, accurate judgement fault bit are carried out to total contactor before powering on It puts.
System schema two:On the basis of system schema one, system further includes control module, and the control module sampling connects Connect the first voltage detection module and the second detection module, control connection total positive contactor, always negative contactor and the preliminary filling Contactor.
System schema three:On the basis of system schema two, the positive output line road or negative output line road are set Current detection module is equipped with, the control module sampling connects the current detection module.
Description of the drawings
Fig. 1 is the hardware structure diagram of electric system above and below electric automobile high-voltage;
Fig. 2 is electric automobile high-voltage power-on and power-off control method flow diagram.
Specific embodiment
The utility model is described in more detail below in conjunction with the accompanying drawings.
As shown in Figure 1, electric system includes power battery 1 and is exported from 1 anode of power battery electric automobile high-voltage up and down Positive output line road and from the negative output line road that power battery cathode exports, in the present embodiment, set inside power battery There is the service switch 2 with fuse, service switch 2 is connected among power battery.Control is provided in the present embodiment, in system System and detection unit 5, are the control cores of system, certainly, the control core of system is also for the diagnosis and control of whole system Can be the battery management system (BMS) in vehicle, in this case, which is not just a part for system.
Positive output line road string is equipped with total positive contactor 9, in total positive contactor 9 for connecting the one of power battery 1 It holds as first end, in total positive contactor 9 is second end for connecting one end of load, from the point of view of the orientation provided with Fig. 1, first Hold the left-hand end for total positive contactor 9, right-hand end of the second end for total positive contactor 9.Negative output line road string is equipped with total negative Contactor 4, total bear in contactor 4 is first end for connecting one end of power battery 1, is used to connect in total negative contactor 4 One end of load is connect as second end, from the point of view of the orientation provided with Fig. 1, left-hand end of the first end for total negative contactor 4, second end is The right-hand end of total negative contactor 4.Total positive contactor 9 is parallel with a preliminary filling branch, and preliminary filling branch road string is equipped with preliminary filling resistance 10 With preliminary filling contactor 8.
Since the basic load of power battery 1 is motor, then, in the present embodiment, the load of power battery 1 is motor control Device 6 processed has filter capacitor, also referred to as pre-charging capacitor in electric machine controller 6, and preliminary filling branch can be to pre- in electric machine controller 6 Charging, which is held, carries out preliminary filling.In the present embodiment, string is equipped with molten on the circuit between total positive contactor 9 and the anode of electric machine controller 6 Disconnected device 7.
Control and the control of detection unit 5 connect total positive contactor 9, always negative contactor 4 and preliminary filling contactor 8, pass through control Signal controls the state of these three contactors.In the present embodiment, total positive contactor 9, always negative contactor 4 and preliminary filling contactor 8 are equal It is contact and control coil respectively including two parts, then, the contact string of total positive contactor 9 is located at positive output line road, always The contact string of negative contactor 4 is located at negative output line road, and the contact string of preliminary filling contactor 8 is located at preliminary filling branch road, control and The control coil of the total positive contactor 9 of the control connection of detection unit 5, total negative contactor 4 and preliminary filling contactor 8, as shown in Figure 1.
System further includes first voltage detection module and second voltage detection module, and first voltage detection module is used to detect The total positive contactor 9 of the voltage of the left-hand end of total positive contactor 9 and the left-hand end of total negative contactor 4, i.e. detection and always negative contactor 4 Voltage close to 1 this one end of power battery, is known as stagnation pressure 1 by the detection signal of first voltage detection module;Second voltage detects Module is used to detect the voltage of the right-hand end of total positive contactor 9 and the right-hand end of total negative contactor 4, the i.e. total positive contactor 9 of detection With total negative contactor 4 close to the voltage of 6 this one end of electric machine controller, the detection signal of second voltage detection module is known as stagnation pressure 2.So, it is 1 negative signal of 1 positive signal of stagnation pressure and stagnation pressure respectively there are two the signals of first voltage detection module detection, the There are two the signals of two voltage detection modules detection, is 2 negative signal of 2 positive signal of stagnation pressure and stagnation pressure respectively.First voltage is examined It surveys module and second voltage detection module is not shown in Fig. 1, be only indicated with detecting circuit, and due to voltage detecting Module belongs to existing equipment, just no longer illustrates here.Control and detection unit 5 sampling connection first voltage detection module and Second voltage detection module, for receiving the voltage signal of the two voltage detection modules detection.In addition, control and detection unit 5 are also connected by connection with electric machine controller 6.
Further, current detection module 3 is additionally provided in system, for detecting the output current of power battery 1, setting On positive output line road or negative output line road, the present embodiment is disposed at negative output line road, control and detection Unit 5 samples connection current detection module 3 by current detecting line.
In vehicle without catastrophe failure, after control and detection unit 5 receive vehicle power on signal, first is detected first The voltage signal that voltage detection module detects, i.e. 1 signal of stagnation pressure, if stagnation pressure 1 is less than setting value (in order to be shone with claims Should, setting value at this time is third setting value), the diagnosable fuse blows failure in service switch 2 (certainly, open by repair The fuse blows failure diagnostic process closed in 2 can be omitted, and directly carries out follow-up always negative contactor adhesion fault and is always just connecing The diagnosis of tentaculum adhesion fault);If detecting stagnation pressure 1 in vehicle high pressure range of normal value, adhesion is carried out to main contactor and is examined It is disconnected:1. always the adhesion diagnostic method of negative contactor is:First it is closed preliminary filling contactor, i.e., the situation that only preliminary filling contactor is closed Under, if detecting the voltage signal that second voltage detection module detects, i.e., stagnation pressure 2 is more than a setting value (in order to be wanted with right Book is asked to correlate, setting value at this time is the first setting value), then be diagnosed as always bearing contactor adhesion fault, reporting fault, terminate on Electric current journey;If can't detect stagnation pressure 2, contactor fault-free is always born, then, the adhesion diagnosis of total positive contactor is carried out, therefore, 2. the adhesion diagnostic method of total positive contactor is:Control disconnects preliminary filling contactor, is then closed always negative contactor, i.e., is connect in preliminary filling In the case that tentaculum disconnects, always negative contactor fault-free and only total negative contactor are closed, if detecting, stagnation pressure 2 is set more than one Definite value (in order to correlate with claims, setting value at this time is the second setting value), then be diagnosed as total positive contactor adhesion event Barrier, if can't detect stagnation pressure 2, total positive contactor fault-free, control disconnects always negative contactor.Therefore, any failure is detected, Setting error code is reported, vehicle, which cannot enter, normally powers on flow.
After if control and detection unit 5 receive vehicle power on signal, vehicle power-up diagnostics then enter normal without any failure Power on flow, be closed always negative contactor first, time-out time is set, if in the time-out time stagnation pressure 1 whether normal and vehicle Whether the diagnosis without catastrophe failure is not completed, and represents self-test time time-out, then electric fault in high pressure is reported (certainly, should Process of self-test is specific embodiment, it is convenient to omit), preliminary filling contactor is closed if self-test normally, i.e., is first closed total bear and connects After tentaculum recloses preliminary filling contactor, to the pre-charging capacitor in electric machine controller into line precharge, and the voltage of stagnation pressure 2 is detected Value, if the voltage value of stagnation pressure 2 be more than setting allow power on voltage value, control the total positive contactor of closure, be then turned off preliminary filling Contactor completes electrifying timing sequence control.Since stagnation pressure 2 is the voltage close to electric machine controller side, the voltage of stagnation pressure 2 Value can be understood as the voltage value of pre-charging capacitor, a time be set, if the voltage value of pre-charging capacitor is still small after the setting time Allow to power on voltage value in setting, then high pressure is reported to power on preliminary filling failure.
Control and detection unit are received under vehicle after electric signal, and current detection module detection circuit current value works as current value Less than setting when descending electric current value, control disconnects total positive contactor, then issues electric machine controller actively by connection Electric discharge instruction controls pre-charging capacitor in electric machine controller to discharge, then detection stagnation pressure 2, and the voltage in pre-charging capacitor continuously decreases, When the voltage value in pre-charging capacitor, which is less than setting, can descend piezoelectric voltage value, control disconnects always negative contactor, completes lower electric control.If The fixed time, if voltage value after the setting time in pre-charging capacitor is still greater than can descend piezoelectric voltage value, it may also be said to, time-out Voltage value is still greater than that can descend piezoelectric voltage value, then still off always negative contactor, but report electric fault under high pressure.Therefore, in current value Lower electricity is carried out less than when can descend electric current value, device band can be avoided contact with and carry lower electricity, the service life of contactor can be extended, and And detection stagnation pressure 2 is controlled less than when setting and can descend piezoelectric voltage value, and the electric energy that vehicle has can be made in a safe condition.Fig. 2 For the overall flow figure of electric automobile high-voltage power-on and power-off control method, also, each setting value in the present embodiment can basis Actual needs is set.
Specific embodiment is presented above, but the utility model is not limited to described embodiment.This practicality Novel basic ideas are above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present utility model, The model, formula, parameter for designing various modifications do not need to spend creative work.In the principle for not departing from the utility model The scope of protection of the utility model is still fallen with the change, modification, replacement and modification carried out in the case of spirit to embodiment It is interior.
The above method can be used as a kind of computer program, be stored in depositing in electric control system above and below electric automobile high-voltage It can run in reservoir and on the processor above and below electric automobile high-voltage in electric control system.

Claims (3)

1. a kind of electric automobile high-voltage electric system up and down, which is characterized in that defeated including power battery and from power battery anode The positive output line road that goes out and from the negative output line road that power battery cathode exports, positive output line road string, which is equipped with, always just to be connect Tentaculum, always one end for being used to connect power battery in positive contactor is first end, being loaded for connection in total just contactor One end for second end, negative output line road string is equipped with always negative contactor, in total negative contactor for connecting power battery One end for first end, in total negative contactor is second end for connecting one end of load, and total positive contactor is parallel with One preliminary filling branch, preliminary filling branch road string are equipped with preliminary filling resistance and preliminary filling contactor, and the system also includes first voltages Detection module and second voltage detection module, the first voltage detection module are used to detect total positive contactor first end and always bear The voltage of contactor first end, the second voltage detection module is for detecting total positive contactor second end and always negative contactor the The voltage at two ends.
2. electric system above and below electric automobile high-voltage according to claim 1, which is characterized in that system further includes control mould Block, the control module sampling connect the first voltage detection module and the second detection module, and control connection is described always just to be connect Tentaculum, always negative contactor and preliminary filling contactor.
3. electric automobile high-voltage according to claim 2 up and down electric system, which is characterized in that the positive output line road or Person's negative output line road is provided with current detection module, and the control module sampling connects the current detection module.
CN201721557824.4U 2017-11-20 2017-11-20 Electric system above and below electric automobile high-voltage Active CN207481815U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721557824.4U CN207481815U (en) 2017-11-20 2017-11-20 Electric system above and below electric automobile high-voltage

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Application Number Priority Date Filing Date Title
CN201721557824.4U CN207481815U (en) 2017-11-20 2017-11-20 Electric system above and below electric automobile high-voltage

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CN207481815U true CN207481815U (en) 2018-06-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110752741A (en) * 2019-09-27 2020-02-04 深圳市汇川技术股份有限公司 Method, system, equipment and medium for controlling high-voltage and low-voltage power supply driving circuit to be powered on and powered off
CN112630507A (en) * 2018-09-17 2021-04-09 宁德时代新能源科技股份有限公司 Control method, controller and medium for power failure detection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112630507A (en) * 2018-09-17 2021-04-09 宁德时代新能源科技股份有限公司 Control method, controller and medium for power failure detection circuit
CN110752741A (en) * 2019-09-27 2020-02-04 深圳市汇川技术股份有限公司 Method, system, equipment and medium for controlling high-voltage and low-voltage power supply driving circuit to be powered on and powered off

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