CN102540064A - Sintering detection method for contactor in high-voltage discharge control circuit - Google Patents

Sintering detection method for contactor in high-voltage discharge control circuit Download PDF

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CN102540064A
CN102540064A CN 201010616133 CN201010616133A CN102540064A CN 102540064 A CN102540064 A CN 102540064A CN 201010616133 CN201010616133 CN 201010616133 CN 201010616133 A CN201010616133 A CN 201010616133A CN 102540064 A CN102540064 A CN 102540064A
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contactor
voltage
contact
negative
positive
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CN 201010616133
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Chinese (zh)
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宋俊俊
王柯
王超
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比亚迪股份有限公司
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Abstract

The invention provides a sintering detection method for a contactor. According to the method, the used hardware circuit is a high-voltage discharge control circuit which is used commonly and current on an electric automobile. A power battery, a positive electrode contactor, a negative electrode contactor, a precharge contactor and a precharge resistor are involved; a motor driver with a precharge capacitor controls the switch-on and switch-off of the positive electrode contactor, the negative electrode contactor and the precharge contactor and detects voltage of the precharge capacitor; and whether the positive and negative electrode contactors in the discharge circuit are sintered or not is judged according to the detected voltage change of the precharge capacitor.

Description

一种高压放电控制回路中接触器烧结检测方法 A high-pressure discharge control circuit of the contactor detector sintered

技术领域 FIELD

[0001] 本发明涉及电动汽车的高压放电系统,更具体的说,本发明涉及电动汽车高压放电回路中接触器烧结的检测方法。 [0001] The present invention relates to a high-voltage discharge system of an electric vehicle, and more particularly, the present invention relates to a method for detecting contact of an electric vehicle sintered high voltage discharge circuit.

背景技术 Background technique

[0002] 目前电动汽车普遍采用的高压放电控制回路,该放电回路主要采用正极接触器和负极接触器控制高压放电系统的通断。 [0002] The present electric vehicles commonly used high-pressure discharge control circuit, the discharge circuit mainly contacts the positive contact and a negative high-voltage discharge control system off. 一旦正极和负极接触器烧结,则接触器的关断作用失效,则整个高压系统一直带电。 Once the positive and negative electrodes contact sintering, the effect of the contactor OFF failure, the entire system has been charged high pressure. 在行车、驻车或检修过程中有可能对人员产生严重伤害。 In traffic, parking or repair process may have serious personal injury. 解决以上问题的方案之一是额外增加一个接触器烧结检测模块,但是需要增加成本和体积,而且检测过程复杂,可靠性差,维修困难。 One solution to the above problem is to contact an additional sintering a detection module, but the need to increase the cost and size, and the detection process is complex, unreliable, difficult to repair. 这与市场要求的低成本,高可靠性相背。 This is contrary to the requirements of the market, low cost and high reliability.

发明内容 SUMMARY

[0003] 本发明针对现有技术中高压放电回路中利用接触器烧结检测模块检测接触器烧结带来的成本高,可靠性差,维修困难等问题,提供一种低成本,可靠性高的接触器烧结检测方法。 [0003] The present invention utilizes the prior art for high voltage discharge circuit contactor sintering cost detection module detecting contact sintering brought, poor reliability, difficulty of maintenance problems and to provide a low-cost, high reliability contacts detection sintering.

[0004] 本发明提供的一种高压放电控制回路中接触器烧结检测方法,其中,所述放电控制回路包括动力电池、正极接触器、负极接触器、预充接触器、预充电阻及带有预充电容的电机驱动器,所述正极接触器与动力电池正极相接,所述负极接触器与动力电池负极相接, 所述正极接触器和负极接触器的另一端与所述带有预充电容的电机驱动器相接,所述预充电阻与预充接触器串接之后与所述正极接触器并接,所述控制回路正常工作时所述正极接触器和负极接触器闭合,所述预充接触器断开,所述接触器烧结检测方法包括:控制正极接触器、负极接触器和/或预充接触器的通断顺序,并检测通断过程中预充电容的电压变化, 根据检测到的电容电压变化判断正负极接触器是否烧结。 [0004] The present invention provides a high-pressure discharge detection circuit sintering contactor control, wherein said control circuit includes a battery discharge, the positive contact, a negative contact, precharge contactor, and with a precharge resistor pre-charging capacitor motor driver, the positive contact with the power battery cathode contact, the negative contact and the negative battery contact, the precharge contactor and the other end of the positive electrode and the negative electrode having contact with the receiving motor driver phase, after the precharge resistor connected in series with the precharge contactor and contact with the positive contact, the normal operation of the control circuit of the positive electrode and the negative electrode contact when the contact is closed, the pre- charging contactor open, the sintered contact detecting method comprising: controlling a positive contact, a negative contact and / or switching sequential precharge contactor and detects the voltage change of the pre-charging capacitor-off process, according to the detection the capacitance voltage variation is determined whether the sintered positive and negative contacts.

[0005] 进一步地,检测正极接触器是否烧结的方法包括: [0005] Further, if the positive contactor detector sintering method comprising:

[0006] 步骤一,断开所述正极接触器; [0006] Step a disconnect the positive contact;

[0007] 步骤二,检测所述预充电容的一次电压,并与所述动力电池两端的电压进行比较, 根据比较结果判断所述正极接触器是否烧结。 [0007] Step two, the pre-charge detecting voltage of primary contents, and with the voltage across the battery power, it is determined whether the positive contacts sintering result of the comparison.

[0008] 进一步地,当检测到的预充电容两端的一次电压等于所述动力电池两端的电压时,判断所述正极接触器已经烧结。 When [0008] Further, when the detected voltage is equal to a pre-charging capacitor across the voltage across the battery power, the positive determination has been sintered contact.

[0009] 进一步地,当检测到的预充电容两端的一次电压小于所述动力电池两端的电压时,判断所述正极接触器未烧结。 [0009] Further, when a voltage detected across the pre-charging capacitor is smaller than the voltage across the battery power, it determines the positive contact unsintered.

[0010] 进一步地,在步骤二之后还包括以下步骤: [0010] Further, after step two further comprising the step of:

[0011] 步骤三,断开所述负极接触器并闭合所述预充接触器; [0011] Step three, the negative contactor is disconnected and the precharge contactor closes;

[0012] 步骤四,检测所述预充电容的二次电压,并与所述动力电池两端的电压进行比较, 根据比较结果判断所述正极接触器是否烧结。 [0012] Step four, the pre-charge detecting voltage of the secondary contents, and compared with the voltage across the battery power, it is determined whether the positive contacts sintering result of the comparison.

[0013] 进一步地,当检测到所述预充电容的二次电压上升或者等于所述动力电池两端的电压,则所述负极接触器已经烧结;如果所述预充电容的二次电压小于所述动力电池两端的电压,则所述负极接触器已经正常断开并未烧结。 [0013] Further, when detecting the secondary voltage of the pre-charging capacitor rises or equal to the voltage across the battery power, then the negative electrode has been sintered contact; if the pre-charge voltage is less than the capacity of the secondary said voltage across the battery power, then the negative terminal contactor has opened correctly not sintered.

[0014] 进一步地,在步骤四之后还包括以下步骤: [0014] Further, after the four step further comprises the step of:

[0015] 步骤五,断开所述预充接触器。 [0015] Step five, opening the precharge contactor.

[0016] 进一步地,在检测到正极接触器已经烧结后还包括以下步骤: [0016] Further, the positive electrode has been detected after sintering contactor further comprises the step of:

[0017] 步骤六,则断开所述负极接触器; [0017] Step 6 disconnect the negative contact;

[0018] 步骤七,检测所述预充电容两端的三次电压,如果所述预充电容的三次电压小于所述动力电池两端的电压,则判断所述负极接触器正常断开并未烧结,如果所述预充电容的三次电压等于所述动力电池的电压,则判断所述负极接触器已烧结。 [0018] Step seven, three detecting the pre-charge voltage across the capacitance, if the content of three pre-charging voltage is less than the voltage across the battery power, it is determined that the negative electrode is not normally open contact sintering, if receiving the pre-charge voltage is equal to three times the voltage of the battery power, it is determined that the negative contactor sintered.

[0019] 进一步地,还设置一个与所述电机驱动器相连接的报警模块,当所述电机驱动器检测到所述正极接触器和/或负极接触器出现烧结,则所述电机驱动器将烧结信号通过总线发给报警模块,发出报警信号。 [0019] Further, it is also provided with an alarm module connected to the motor driver when the motor driver detects the contact of the positive electrode and / or negative contacts sintering occurs, then the motor drive signal through the sintered bus sent to the alarm module, an alarm signal.

[0020] 进一步地,还设有一个与所述电机驱动器电连接的存储单元,用于记录所述接触器烧结的故障代码。 [0020] Further, it is also provided with a storage unit connected to said electric motor drive, for recording the sintered contact fault code.

[0021] 上述技术方案,通过控制正极接触器、负极接触器和/或预充接触器的通断,并检测通断过程中预充电容的电压变化,根据检测到的预充电容电压变化判断正负极接触器是否烧结,实现了对正极接触器和负极接触器是否烧结的检测,与现有技术相比,该方法不需要增加额外的硬件电路,检测时间短,成本低而且安全可靠。 [0021] The above technical solution, by controlling the positive contact, a negative contact and / or the precharge contactor off, and detects a voltage variation pre-charging capacitor-off process, according to the detected pre-charging capacitor voltage variation determination whether sintered positive and negative contacts, to achieve the detection of the positive electrode and the negative electrode contacts the contact whether sintering, compared with the prior art, which does not require additional hardware, the detection time is short, low cost and safe.

[0022] 通过结合附图,阅读以下对发明的具体实施例的详细描述,可以进一步理解本发明的优点、特征。 [0022] conjunction with the accompanying drawings, the following detailed description of specific embodiments of the invention may be further appreciated that the advantages of the present invention is characterized.

附图说明 BRIEF DESCRIPTION

[0023] 附图1为本发明的优选实施例的高压放电控制回路的电路示意图; Example of high-pressure [0023] Figure 1 of the present invention is preferably a circuit diagram of a discharge control circuit;

[0024] 附图2为本发明的优选实施例接触器烧结检测方法的步骤图; [0024] Step Example FIG preferred sintering method for detecting contact of FIG. 2 embodiment of the present invention;

[0025] 附图3为本发明的另一种实施例接触器烧结检测方法的步骤图。 [0025] FIG Another sintering step method for detecting contact of FIG. 3 embodiment of the present invention.

具体实施方式 Detailed ways

[0026] 为了使本发明所解决的技术问题、技术方案及有益效果更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。 [0026] In order to solve the technical problem of the present invention, technical solutions and beneficial effects clearer, the accompanying drawings and the following embodiments, the present invention will be further described in detail. 应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。 It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention.

[0027] 目前的电动汽车普遍采用如附图1所示的高压放电控制回路,包括动力电池10、 正极接触器KM1、负极接触器KM2、预充接触器KM3、预充电阻R及带有预充电容C的电机驱动器20,所述正极接触器KMl的一端与动力电池10正极相接,所述负极接触器KM2的一端与动力电池10负极相接,所述正极接触器KMl和负极接触器KM2的另一端与所述带有预充电容的电机驱动器20相接,所述预充电阻R和预充接触器KM3串接之后与所述正极接触器KMl并接,所述预充电阻R对所在支路流过的电流有阻碍作用,所述在一定的电压范围内预充电阻R能够保护所述预充接触器KM3,所以所述预充接触器KM3不会烧结。 [0027] It is widely used high-pressure electric vehicle shown in Figure 1 the discharge control circuit comprises a power battery 10, the positive terminal contactor KM1, the negative terminal contactor KM2, KM3 precharge contactor, and the precharge resistor R with a pre- charging capacitor C is a motor driver 20, the positive electrode contacts the positive electrode 10 at one end of the power battery KMl contact, the negative contact with one end of the power battery 10 KM2 negative contact, the positive contact and the negative contact KMl KM2 end 20 in contact with the other pre-charging capacitor with the motor driver, the precharge resistor R and the precharge contactor KM3 series after contact with the positive electrode and connected KMl, the precharge resistor R where there is a current flowing through the branch impediment, the resistance R can be protected precharge the precharge contactor KM3 within a certain voltage range, so that the precharge contactor KM3 not sintered. 该高压放电控制回路主要采用正极接触器KMl和负极接触器KM2控制高压放电系统的通断,在车辆正常工作时,正极接触器KMl和负极接触器KM2闭合,预充接触器KM3断开,动力电池10为电机CN 102540064 A The high pressure discharge control circuit mainly contacts the positive electrode and the negative contactor KM2 KMl high-voltage discharge control system off when the vehicle is working properly, the positive electrode and the negative electrode contact KMl closed contactor KM2, KM3 precharge contactor is disconnected, the power the battery 10 for the motor CN 102540064 A

驱动器20供电,电机驱动器20正常工作。 Power driver 20, a motor driver 20 operates normally. 在电机驱动器20工作时,动力电池10同时为电机驱动器20内部的预充电容C充电,动力电池10的电压为U,预充电容C的电压Uc与动力电池电压U相等;车辆正常断电时,正极接触器KMl和负极接触器KM2断开,预充电容C的电压Uc下降至零,整个高压放电控制回路停止工作。 When the vehicle is normally powered off; when the 20 operation of the motor drive, the power battery 10 simultaneously precharge the interior of the motor driver 20 capacity C charged voltage of battery 10 is U, the pre-charging capacitor C is a voltage Uc and the battery voltage U is equal to the positive electrode and the negative electrode contact KMl contactor KM2 is disconnected, the precharge voltage Uc capacity C decreases to zero, the entire high-voltage discharge control circuit to stop working.

[0028] 检测控制回路中接触器是否烧结的方法如附图2所示,该方法包括以下步骤: [0028] The control circuit detects whether the contact sintering method as shown in Figure 2, the method comprising the steps of:

[0029] 步骤Si,断开正极接触器KMl ; [0029] Step Si, disconnect the positive electrode contacts the KMl;

[0030] 步骤S2,检测预充电容C的一次电压Ucl的变化,并与所述动力电池10两端的电压U进行比较,根据比较结果判断所述正极接触器KMl是否烧结。 [0030] Step S2, the detection of a change in the voltage pre-charge Ucl capacity C and U with the voltage across the battery 10, it is determined whether the positive contact KMl sintering result of the comparison.

[0031] 具体地,如果正极接触器KMl已经烧结,则无法将其正常断开,正极接触器KMl处于闭合状态,预充电容C的一次电压Ucl依然保持和动力电池10的电压U—致,如果此时检测到预充电容C的一次电压等于动力电池10两端的电压,即Ucl= U,则可以判断正极接触器KMl已经烧结;如果正极接触器KMl正常工作,则此时正极接触器KMl应该正常断开, 动力电池10与预充电容C之间不再有电连接,预充电容C在电机驱动器内会开始自放电, 预充电容C两端的电压Ucl下降,最终至零,如果此时检测到预充电容C的电压Ucl小于动力电池电压U,即下降或者为零,则可以判断正极接触器KMl正常工作并未烧结。 [0031] In particular, if the positive terminal contactor KMl been sintered, it can not be normally open, the positive terminal contactor KMl in the closed state, the precharge voltage of the primary voltage remains Ucl capacity C and the power battery 10 induced U-, If at this time detected pre-charging capacitor C is a voltage equal to the voltage across the battery 10, i.e. Ucl = U, positive contact can be judged already sintered KMl; KMl if the positive contactor is working properly, this time positive terminal contactor KMl It should be normally open, the battery power 10 and pre-charging capacitor C is no longer electrically connected between precharge capacitor C will begin to self-discharge in the motor drive, both ends of the pre-charging capacitor C Ucl voltage drop, eventually to zero, if this upon detecting the precharge voltage is less than the capacity C of Ucl battery voltage U, i.e., decreased or zero, positive contact can be judged not work KMl sintering.

[0032] 所述检测方法在判断正极接触器是否烧结后还包括以下步骤: [0032] The method for detecting the contact of the positive electrode after determining whether the step of sintering further comprises:

[0033] 步骤S3,断开负极接触器KM2,闭合预充接触器KM3。 [0033] Step S3, the disconnect the negative contactor KM2, closed precharge contactor KM3.

[0034] 步骤S4,检测预充电容C的二次电压Uc2,并与所述动力电池10两端的电压U进行比较,根据比较结果判断所述负极接触器KM2是否烧结。 [0034] Step S4, the detection of secondary precharge voltage Uc2 capacity C, and with the power voltage U across the battery 10 is compared, the negative result of the comparison determines whether the contactor KM2 sintering.

[0035] 具体地,如果正极接触器KMl未烧结,并且负极接触器KM2也未烧结正常断开,则整个控制回路处于断开,所述预充电容C开始自放电,二次电压Uc2下降,如果断开负极接触器KM2的时间过长,预充电容C已经放电完毕,则二次电压Uc2为零;如果负极接触器KM2 已经烧结,则其所在的支路无法断开,整个控制回路处于导通状态,动力电池10给预充电容C充电,预充电容C 二次的电压Uc2上升。 [0035] In particular, if the positive terminal contactor KMl green, and the negative contactor KM2 unsintered also normally open, the entire control circuit is turned off, the pre-charging capacitor C starts self-discharge, the second voltage Uc2 drop, If the negative contactor KM2 off time is too long, the pre-charging capacitor C has discharged, the secondary voltage Uc2 is zero; if the anode contactor KM2 has been sintered, it is not turned off at the branch, the entire control loop is conducting state, the power of the battery 10 to the pre-charging capacitor C is charged, the voltage pre-charging capacitor C is a secondary rise Uc2.

[0036] 如果正极接触器KMl已经烧结,则其所在的支路一直处于导通状态,将预充接触器KM3所在的支路短路,此时如果负极接触器KM2未烧结正常断开,则整个控制回路处于断开,所述预充电容C开始自放电,二次电压Uc2下降,如果断开负极接触器KM2的时间过长, 预充电容C已经放电完毕,则二次电压Uc2为零;如果负极接触器KM2已经烧结,则整个控制回路在整个检测过程中一直处于导通状态,预充电容C的二次电压Uc2等于动力电池10 的电压U,即Uc2 = U。 [0036] If the positive terminal contactor KMl been sintered, the branch in which it has been in the ON state, the precharge branch KM3 where short contact time if the negative contactor KM2 unsintered normally open, the entire the control loop is disconnected, the pre-charging capacitor C starts self-discharge, the second voltage Uc2 drop, if KM2 disconnect the negative contact time is too long, a pre-charging capacitor C has discharged, the secondary voltage Uc2 is zero; If the negative contactor KM2 has been sintered, the entire control loop in the whole process has been detected in the oN state, the precharge voltage of the secondary power capacity C is equal to the battery voltage Uc2 U 10, i.e. Uc2 = U.

[0037] 因此,如附图2所示的实施方式,在对负极接触器KM2的检测过程中,如果检测到预充电容C的二次电压Uc2小于所述动力电池10两端的电压,即下降或者为零,则所述负极接触器KM2并未烧结,如果检测到预充电容C的二次电压Uc2上升或者等于所述动力电池10的电压U,则所述负极接触器已经烧结。 [0037] Accordingly, as shown in the embodiment 2 of the drawings, the detection process of the negative contactor KM2, if the detected voltage of the secondary pre-charging capacitor C is less than the voltage Uc2 10 across the battery, i.e., decrease or zero, then the negative contactor KM2 are not sintered, if the detected voltage of the secondary of the pre-charging capacitor C rises Uc2 or equal to the battery voltage U 10, then the negative terminal contactor has been sintered.

[0038] 步骤S5,断开所述预充接触器KM3。 [0038] step S5, opening the precharge contactor KM3.

[0039] 完成对所述正极接触器KMl和负极接触器KM2的检测之后,断开所述预充接触器KM3。 After [0039] completion of detection of the positive electrode and the negative electrode KMl contacts of contactor KM2, opening the precharge contactor KM3.

[0040] 附图3示出了本发明的另一种实施例,检测正极接触器KMl是否烧结的步骤与附图2的步骤Sl和步骤S2相对应,不同的是,通过步骤Sl和S2检测出正极接触器KMl已经烧结的情况下,进行步骤S6和步骤S7。 [0040] FIG. 3 shows another embodiment of the present invention, the detection whether the positive terminal contactor KMl sintering step of step Sl of Figure 2 and corresponds to the step S2, except that, in step Sl and S2 detects the positive electrode has been sintered contact KMl, the step S6 and step S7.

[0041] 步骤S6,断开负极接触器KM2 ; [0041] Step S6, the disconnect the negative contactor KM2;

[0042] 步骤S7,检测预充电容C的三次电压Uc3,如果所述预充电容C的三次电压Uc3小于所述动力电池10两端的电压U,则判断所述负极接触器KM2正常断开并未烧结,如果所述预充电容C的三次电压Uc3等于所述动力电池10的电压U,则判断所述负极接触器KM2已 [0042] In step S7, the detection of the three pre-charging voltage Uc3 capacity C, if the capacity C of the three pre-charging voltage is less than the voltage U 10 Uc3 across the battery, the negative electrode is determined normally open contactor KM2 and green, if the pre-charging capacitor C is equal to three times the voltage of the power Uc3 battery voltage U 10, then the determination is negative contactor KM2

AmS口° AmS port °

[0043] 具体地,如果通过附图2的步骤Sl和S2检测出正极接触器KMl已经烧结,断开负极接触器KM2,检测预充电容C的三次电压Uc3,如果负极接触器KM2未烧结正常断开,则其所在的支路断开,预充电容C自放电,其三次电压Uc3下降,如果负极接触器KM2断开时间较长,预充电容C放电完毕,三次电压Uc3为零;如果负极接触器KM2已经烧结,则整个控制回路在整个检测过程中一直处于导通状态,预充电容C两端的三次电压Uc3 —直保持与动力电池10 —样的电压,即Uc3 = U,因此,如附图3所示的实施方式,如果检测到预充电容C的三次电压Uc3小于所述动力电池10两端的电压,则所述负极接触器KM2并未烧结,如果检测到预充电容C的三次电压Uc3等于所述动力电池10两端的电压,则所述负极接触器KM2已经烧结。 [0043] Specifically, if the step 2 of the accompanying drawings Sl and S2 detected contact KMl been sintered positive electrode, a negative electrode is disconnected contactor KM2, detects precharge voltage Uc3 cubic capacity C, if the negative terminal contactor KM2 normal unsintered turned off, the branch in which it is turned off, the pre-charging capacitor C self-discharge, which three Uc3 voltage drop, if the negative terminal contactor KM2 off time is longer, the pre-charging capacitor C is discharged, the voltage Uc3 three zero; if negative contactor KM2 has been sintered, the entire control loop in the whole detection process has been in the on state, the pre-charging capacitor across C three voltage Uc3 - direct holding of the power battery 10 - like voltage, i.e. Uc3 = U, therefore, embodiment 3 as shown in the drawings, if the detected three precharge voltage is less than the capacity C of Uc3 voltage across the battery 10, the negative contactor KM2 is not sintered, if it is detected in the pre-charging capacitor C equal to three times the voltage Uc3 voltage across the battery 10, the negative contactor KM2 is already sintered.

[0044] 以上,优选地,所述正极接触器、负极接触器和预充接触器的断开和闭合可由电机驱动器20来控制,也可以单独设置接触器控制器来控制;整个检测过程及数据比较及分析判断可以由电机驱动器来控制进行,也可以设置其他的控制器来控制进行。 [0044] or more, preferably, contacts the positive electrode, a negative electrode precharge contactor and the contactor may be opened and closed to control the motor driver 20, the contact may be provided separately to control the controller; and the entire detection process data Comparative analysis and determination may be controlled by a motor drives may be provided to control other controllers.

[0045] 进一步地,还设有一个与所述电机驱动器相连接的报警模块,当所述电机驱动器检测到所述正极接触器或者负极接触器出现烧结,则所述电机驱动器将烧结信号通过总线发给报警模块,发出报警信号,提醒驾驶人员,该报警模块可以为报警显示屏,报警指示灯, 或者能发出报警信号的声音装置。 [0045] Further, it is also provided with an alarm module connected to the motor driver, the motor driver when detecting the positive contactor or the negative contactor sintering occurs, then the motor drive signal through the bus sintered issued alarm module, an alarm signal to alert the driver, the alarm module may display an alarm, alarm lamp, or an alarm device capable of emitting sound signals.

[0046] 同时,更进一步地,还设有一个与所述电机驱动器电连接的存储单元,用于记录所述接触器烧结的故障代码,以供专业人员使用车载诊断仪进行检测时,提供详细的信息。 When [0046] the same time, further, it is also provided with a storage unit connected to said electric motor drive, for recording the sintered contact fault code, for professional use onboard diagnostic detection, detailed Information.

[0047] 以上所述仅为发明的较佳实施例而已,并不用以限制发明,凡在发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 [0047] The foregoing is only preferred embodiments of the invention but are not intended to limit the invention, and any modifications within the spirit and principle of the invention, equivalent substitutions and improvements should fall in the protection of the present invention within range.

Claims (10)

1. 一种高压放电控制回路中接触器烧结检测方法,其中,所述高压放电控制回路包括动力电池、正极接触器、负极接触器、预充接触器、预充电阻及带有预充电容的电机驱动器, 所述正极接触器的一端与动力电池正极相接,所述负极接触器的一端与动力电池负极相接,所述正极接触器和负极接触器的另一端与所述带有预充电容的电机驱动器相接,所述预充电阻和预充接触器串接之后与所述正极接触器并接,所述高压放电控制回路正常工作时所述正极接触器和负极接触器闭合,所述预充接触器断开,其特征在于,所述接触器烧结检测方法包括:控制正极接触器、负极接触器和/或预充接触器的通断,并检测通断过程中预充电容的电压变化,根据检测到的预充电容电压变化判断正负极接触器是否烧结。 Sintering the contact detection circuit 1. A high-pressure discharge control, wherein the control circuit comprises a high-pressure discharge battery, the positive contact, a negative contact, precharge contactor, and the precharge resistor with the pre-charging capacitor motor drive, with one end of the positive battery cathode contacts in contact, the negative contact of the battery and the negative contact end, the other end of the precharge of the positive electrode and the negative electrode contact with the contactor with receiving motor driver phase, after the precharge resistance and a precharge contactor is connected in series with said positive contact and connected, the high pressure discharge control circuit when normal operation of said positive contact and a negative contactor is closed, the said precharge contactor is opened, wherein said sintered contact detecting method comprising: controlling a positive contact, a negative contact and / or the precharge contactor off and oFF states are detected during the pre-charging capacitor voltage changes, based on the detected pre-charging capacitor positive and negative voltage change is determined whether the contact sintering.
2.根据权利要求1所述的高压放电控制回路中接触器烧结检测方法,其特征在于,检测正极接触器是否烧结的方法包括:步骤一,断开所述正极接触器;步骤二,检测所述预充电容的一次电压,并与所述动力电池两端的电压进行比较,根据比较结果判断所述正极接触器是否烧结。 The high-pressure discharge according to claim 1 in the control circuit the sintered contact detecting method, wherein, if the positive contactor detector sintering method comprising: a step, opening the positive terminal contactor; two step, detecting said primary precharge voltage tolerance and of the power with the voltage across the battery, determining whether the positive contacts sintering result of the comparison.
3.根据权利要求2所述的高压放电控制回路中接触器烧结检测方法,其特征在于,当检测到的预充电容两端的一次电压等于所述动力电池两端的电压时,判断所述正极接触器已经烧结。 The high-pressure circuit according to claim 2 in the sintered discharge control method using the contactor detector, characterized in that, when a voltage detected across a pre-charge capacity is equal to the voltage across the battery power, said positive contact determination already sintering.
4.根据权利要求2所述的高压放电控制回路中接触器烧结检测方法,其特征在于,当检测到的预充电容两端的一次电压小于所述动力电池两端的电压时,判断所述正极接触器未烧结。 The high voltage circuit according to claim 2 in the sintered discharge control method using the contactor detector, characterized in that, when a voltage detected across the pre-charging capacitor is smaller than the voltage across the battery power, said positive contact determination is unsintered.
5.根据权利要求2所述的高压放电控制回路中接触器烧结检测方法,其特征在于, 在步骤二之后还包括以下步骤:步骤三,断开所述负极接触器并闭合所述预充接触器;步骤四,检测所述预充电容的二次电压,并与所述动力电池两端的电压进行比较,根据比较结果判断所述负极接触器是否烧结。 The high-pressure circuit according to claim 2 in the sintered discharge control method using the contactor detector, characterized in that, after step two further comprises the following steps: Step three, the negative contactor is disconnected and close the pre-contactor ; a step four, the pre-charge detecting voltage of the secondary contents, and compared with the voltage across the battery power, the negative contactor according to the comparison result determines whether or sintering.
6.根据权利要求5所述的高压放电控制回路中接触器烧结检测方法,其特征在于,当检测到所述预充电容的二次电压上升或者等于所述动力电池两端的电压,则所述负极接触器已经烧结;如果所述预充电容的二次电压小于所述动力电池两端的电压,则所述负极接触器已经正常断开并未烧结。 The high voltage circuit of claim 5, wherein the sintering method for detecting a discharge control contact, wherein, when detecting the secondary voltage of the pre-charging capacitor rises or equal to the voltage across the battery power, then the sintering has the negative terminal contactor; if the pre-charge capacity of the secondary voltage is less than the voltage across the battery power, then the negative terminal contactor has opened correctly not sintered.
7.根据权利要求5所述的高压放电控制回路中接触器烧结检测方法,其特征在于,在步骤四之后还包括以下步骤:步骤五,断开所述预充接触器。 The high-pressure discharge to claim 5, wherein the control circuit sintered contact detecting method, wherein, after step further comprises the four steps: Step five, opening the precharge contactor.
8.根据权利要求3所述的高压放电控制回路中接触器烧结检测方法,其特征在于,在检测到正极接触器已经烧结后还包括以下步骤:步骤六,断开所述负极接触器;步骤七,检测所述预充电容两端的三次电压,如果所述预充电容的三次电压小于所述动力电池两端的电压,则判断所述负极接触器正常断开并未烧结,如果所述预充电容的三次电压等于所述动力电池的电压,则判断所述负极接触器已烧结。 8. The high voltage discharge circuit of claim 3, wherein the sintering method for detecting contactor control, wherein the positive electrode has been detected after sintering contactor further comprises the following steps: Step six, disconnect the negative contact; Step seven, three times the pre-charge detection voltage tolerances across, if the content of three pre-charging voltage is less than the voltage across the battery power, it is determined that the negative electrode is not normally open contact sintering, if the pre-charge voltage is equal to three times the capacity of the power voltage of the battery, the negative terminal contactor is determined sintered.
9.根据权利要求1所述的高压放电控制回路中接触器烧结检测方法,其特征在于,还设置一个与所述电机驱动器相连接的报警模块,当所述电机驱动器检测到所述正极接触器和/或负极接触器出现烧结,则所述电机驱动器将烧结信号通过总线发给报警模块,发出报警信号。 9. The high voltage discharge circuit according to claim 1 in the control method of contacting the sintered detector, wherein the alarm module is further provided with a drive of said motor is connected, the motor driver when the positive contactor is detected and / or the negative contactor sintering occurs, then the motor driver bus grant signal through a sintered alarm module, an alarm signal.
10.根据权利要求1所述的高压放电控制回路中接触器烧结检测方法,其特征在于,还设有一个与所述电机驱动器电连接的存储单元,用于记录所述接触器烧结的故障代码。 10. The high-voltage discharge according to claim 1, the sintered detection circuit contactor control, wherein, further provided with a storage unit connected to said electric motor drive, for recording the fault code sintered contact .
CN 201010616133 2010-12-29 2010-12-29 Sintering detection method for contactor in high-voltage discharge control circuit CN102540064A (en)

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Cited By (5)

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CN102463905A (en) * 2010-10-29 2012-05-23 通用汽车环球科技运作有限责任公司 Diagnosis of HEV/EV battery disconnect system
CN103995211A (en) * 2014-05-30 2014-08-20 长城汽车股份有限公司 Method and system for detecting vehicle high-voltage system
CN104656629A (en) * 2013-11-18 2015-05-27 比亚迪股份有限公司 Contactor-used sintering detection device and method
CN104833911A (en) * 2014-05-21 2015-08-12 北汽福田汽车股份有限公司 Fault determining method of relay in power battery, and device
CN106405259A (en) * 2015-07-29 2017-02-15 比亚迪股份有限公司 Method and apparatus for sintering detection of motor contactor

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CN1768407A (en) * 2003-03-31 2006-05-03 Nec Lamilion能源株式会社 Method and apparatus for detecting welding of a relay contact

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CN1768407A (en) * 2003-03-31 2006-05-03 Nec Lamilion能源株式会社 Method and apparatus for detecting welding of a relay contact

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102463905A (en) * 2010-10-29 2012-05-23 通用汽车环球科技运作有限责任公司 Diagnosis of HEV/EV battery disconnect system
CN102463905B (en) * 2010-10-29 2015-07-22 通用汽车环球科技运作有限责任公司 Diagnosis of HEV/EV battery disconnect system
CN104656629A (en) * 2013-11-18 2015-05-27 比亚迪股份有限公司 Contactor-used sintering detection device and method
CN104656629B (en) * 2013-11-18 2018-01-23 比亚迪股份有限公司 Sintering detection apparatus and method for contactor
CN104833911A (en) * 2014-05-21 2015-08-12 北汽福田汽车股份有限公司 Fault determining method of relay in power battery, and device
CN103995211A (en) * 2014-05-30 2014-08-20 长城汽车股份有限公司 Method and system for detecting vehicle high-voltage system
CN106405259A (en) * 2015-07-29 2017-02-15 比亚迪股份有限公司 Method and apparatus for sintering detection of motor contactor

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