WO2023231734A1 - 一种高压上下电接触器触点状态诊断装置、方法及车辆 - Google Patents

一种高压上下电接触器触点状态诊断装置、方法及车辆 Download PDF

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Publication number
WO2023231734A1
WO2023231734A1 PCT/CN2023/093426 CN2023093426W WO2023231734A1 WO 2023231734 A1 WO2023231734 A1 WO 2023231734A1 CN 2023093426 W CN2023093426 W CN 2023093426W WO 2023231734 A1 WO2023231734 A1 WO 2023231734A1
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WIPO (PCT)
Prior art keywords
voltage
contactor
electrically connected
resistor
switch
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PCT/CN2023/093426
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English (en)
French (fr)
Inventor
佟丽翠
雷奥
刘鹏飞
牛春静
张伟杰
Original Assignee
中国第一汽车股份有限公司
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Application filed by 中国第一汽车股份有限公司 filed Critical 中国第一汽车股份有限公司
Publication of WO2023231734A1 publication Critical patent/WO2023231734A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • 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
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3275—Fault detection or status indication

Definitions

  • the invention discloses a high-voltage upper and lower electrical contactor contact state diagnosis device, method and vehicle, and belongs to the technical field of vehicle control.
  • the power battery is the core component of electric vehicles and the power source of the entire vehicle. Its voltage is several hundred volts. In order to ensure the safety of its high-voltage output, it usually needs to be connected to its positive and negative output terminals through high-voltage contactors to achieve high voltage. The output is controlled by the high voltage topology shown in Figure 1. However, high-voltage contactors may cause contactor adhesion under abnormal working conditions or improper operation. Once contactor adhesion occurs, it will cause safety hazards. Therefore, contactor contact diagnosis needs to be performed before high voltage is powered on and after high voltage is powered off to ensure the reliability of the diagnosis.
  • the present invention proposes a high-voltage upper and lower electrical contactor contact status diagnosis device, method and vehicle to solve the impact of battery high-voltage load such as X capacitor status on contact voltage sampling and contactor contact status errors. Diagnosis of technical issues, thereby improving the accuracy of contactor contact status diagnosis during high-voltage power on and off, and avoiding misdiagnosis events.
  • a device for diagnosing the contact status of a high-voltage upper and lower electrical contactor which includes a high-voltage power supply. Both ends of the high-voltage power supply are electrically connected to a fuse, a main negative contactor, and one end of a second resistor.
  • the other end of the fuse is electrically connected to the fast charging positive contactor, the precharge contactor, the main positive contactor and the first resistor, and the other ends of the first resistor and the second resistor are connected to each other and to the sampling module Electrically connected, the other end of the fast charging positive contactor is electrically connected to the external load and the voltage dividing module respectively, the other end of the pre-charging contactor is electrically connected to one end of the pre-charging resistor, the main positive contactor and the pre-charging resistor are electrically connected.
  • the other end of the charging resistor is electrically connected to the voltage dividing module, and the other end of the main negative contactor is electrically connected to the external load, the voltage dividing module and one end of the fast charging negative contactor.
  • the fast charging negative contactor The other end of the device is electrically connected to one end of the voltage dividing module and the external load respectively, and the voltage dividing module is electrically connected to the sampling module.
  • the voltage dividing module includes a first switch, one end of the first switch is electrically connected to the main positive contactor and the other end of the precharge resistor respectively, and the other end of the first switch is connected to the third resistor.
  • One end of the third resistor is electrically connected, and the other end of the third resistor is electrically connected to the sampling module and one end of the fourth resistor.
  • the other end of the fourth resistor is electrically connected to the sampling module and one end of the fifth resistor.
  • the fifth resistor The other end is electrically connected to the sampling module and one end of the sixth resistor respectively.
  • the other end of the sixth resistor is electrically connected to one end of the third switch.
  • the other end of the third switch is respectively connected to the external load and the other end of the main negative contactor.
  • One end of the eighth resistor and the ninth resistor are electrically connected to one end of the fast charging negative contactor.
  • One end of the eighth resistor is electrically connected to the sampling module and one end of the seventh resistor.
  • the other end of the eighth resistor is electrically connected to one end of the seventh resistor.
  • another One end of the second switch is electrically connected to one end of the second switch, the other end of the second switch is electrically connected to the other end of the fast charging positive contactor, the other end of the ninth resistor is electrically connected to the sampling module and one end of the tenth resistor respectively, so
  • the other end of the tenth resistor is electrically connected to one end of the fourth switch, and the other end of the fourth switch is electrically connected to the other end of the fast charging negative contactor.
  • the sampling module includes a low-voltage power supply, one end of the low-voltage power supply is electrically connected to the power isolation module, and the other end of the power isolation module is electrically connected to the negative pole of the high-voltage power supply and the data processing unit respectively.
  • the data processing unit They are electrically connected to the voltage dividing module and the data isolation module respectively, and the data isolation module is electrically connected to the controller.
  • the data processing unit includes a voltage reference whose two ends are electrically connected to the power isolation module, the first differential sampling unit, the second differential sampling unit, the third differential sampling unit and the first end of the fourth differential sampling unit respectively.
  • source, the second ends of the first differential sampling unit, the second differential sampling unit, the third differential sampling unit and the fourth differential sampling unit are electrically connected to the data isolation module respectively, and the data processing unit also includes a first end A single-ended sampling unit electrically connected to the power isolation module.
  • the second end of the first differential sampling unit is electrically connected to the other end of the third resistor.
  • the second end of the second differential sampling unit is electrically connected to the other end of the sixth resistor.
  • One end is electrically connected, the second end of the third differential sampling unit is electrically connected to the other end of the eighth resistor, the second end of the fourth differential sampling unit is electrically connected to the other end of the ninth resistor, the single The second end and the third end of the terminal sampling unit are electrically connected to the other end of the second resistor and the negative electrode of the high-voltage power supply respectively.
  • the other end of the main positive relay is electrically connected to one end of the first external Y capacitor and the external X capacitor
  • the other end of the main negative relay is electrically connected to one end of the second external Y capacitor and the other end of the external X capacitor.
  • connection the other end of the first external Y capacitor and the other end of the second external Y capacitor are electrically connected, the first differential sampling unit, the second differential sampling unit, the third differential sampling unit and the fourth differential sampling unit
  • the first sampling point voltage, the second sampling point voltage, the third sampling point voltage and the fourth sampling point voltage are respectively obtained, and the single-ended sampling unit obtains the fifth sampling point voltage.
  • a contact status diagnosis of a high-voltage upper and lower electrical contactor is provided The method is characterized in that it is executed by a high-voltage upper and lower electrical contactor contact state diagnosis device according to the first aspect, and the method includes:
  • the fifth sampling point voltage is obtained through the single-ended sampling unit of the data processing unit, and the AP terminal voltage is obtained through the fifth sampling point voltage;
  • the first sampling point voltage and the third sampling point voltage are respectively obtained through the first differential sampling unit and the third differential sampling unit of the data processing unit.
  • the BP terminal voltage is determined through the first sampling point voltage.
  • the BP terminal voltage is determined through the third differential sampling unit.
  • the sampling point voltage determines the CP terminal voltage;
  • the main positive contactor has a contact sticking fault
  • it also includes:
  • the second sampling point voltage is obtained through the second differential sampling unit of the data processing unit, and the DP terminal voltage is determined through the second sampling point voltage;
  • the main negative contactor has a contact sticking failure
  • the main negative contactor When neither the main negative contactor nor the main positive contactor is faulty, the main negative contactor is closed, and the fourth sampling point voltage is obtained through the fourth differential sampling unit of the data processing unit.
  • the point voltage determines the EP terminal voltage
  • the main negative contactor has a contact sticking failure
  • it also includes:
  • the fifth sampling point voltage is obtained through the single-ended sampling unit of the data processing unit, and the AP terminal voltage is obtained through the fifth sampling point voltage;
  • the first sampling point voltage and the second sampling point voltage are obtained respectively through the first differential sampling unit and the second differential sampling unit of the data processing unit, and the BM terminal is determined through the first sampling point voltage.
  • Voltage determine the DM terminal voltage through the second sampling point voltage;
  • At least one of the main positive contactor and the main negative contactor has a contact sticking failure
  • both the main positive contactor and the main negative contactor are fault-free.
  • it also includes:
  • the third sampling point voltage and the fourth sampling point voltage are obtained respectively through the third differential sampling unit and the fourth differential sampling unit of the data processing unit, and the CM terminal is determined through the third sampling point voltage.
  • Voltage determine the EM terminal voltage through the fourth sampling point voltage;
  • At least one of the charging positive contactor, main negative contactor and charging negative contactor has a contact sticking failure
  • a vehicle wherein the vehicle includes:
  • the high-voltage upper and lower electrical contactor contact status diagnosis device described in the first aspect is used to perform fault detection on the main positive contactor, the main negative contactor, the precharge contactor, the fast charge positive contactor and the fast charge negative contactor respectively. ;
  • a storage device for storing one or more programs
  • the one or more controllers When the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement the high-voltage upper and lower electrical contactor contact state diagnosis method described in the second aspect.
  • the invention discloses a high-voltage upper and lower electrical contactor contact state diagnosis device, method and vehicle.
  • the complexity of the high and low isolation design is reduced; it provides A voltage reference source.
  • the main positive, main negative, charging positive, and charging negative outer voltages are all sampled with reference to this reference source.
  • the LINK voltage and DCLINK voltage can be collected.
  • each high-voltage sampling circuit has switch control, and the contact voltage of the positive contactor and negative contactor is sampled in a time-sharing manner, so that the external load status is not related to the sampling circuit, and the sampling results are not affected by the external load status.
  • each high-voltage sampling circuit has switch control, and the contact voltage of the positive contactor and negative contactor is sampled in a time-sharing manner, so that the external load status is not related to the sampling circuit, and the sampling results are not affected by the external load status.
  • Figure 1 is an electrical connection diagram of a high-voltage upper and lower electrical contactor contact state diagnosis device of the present invention.
  • Figure 2 is an electrical connection diagram of the sampling module in a high-voltage upper and lower electrical contactor contact status diagnostic device.
  • Figure 3 is a flow chart of a method for diagnosing the contact status of a high-voltage upper and lower electrical contactor according to the present invention.
  • Figure 4 is a flow chart of a method for diagnosing the contact status of a high-voltage upper and lower electrical contactor according to the present invention.
  • Figure 5 is a structural block diagram of a vehicle of the present invention.
  • connection should be understood in a broad sense.
  • connection or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • connection or integral connection
  • connection or integral connection
  • connection can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium
  • it can be an internal connection between two components.
  • specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the first embodiment of the present invention provides a high-voltage upper and lower electrical contactor contact status diagnosis device based on the existing technology, including a high-voltage power supply. Both ends of the high-voltage power supply are connected to a fuse and a main negative contactor respectively. is electrically connected to one end of the second resistor, and the other end of the fuse is connected to the fast charging positive contactor and pre-charger respectively.
  • the charging contactor, the main positive contactor and the first resistor are electrically connected.
  • the other ends of the first resistor and the second resistor are connected to each other and to the sampling module.
  • the other end of the fast charging positive contactor is connected to the external load and voltage divider respectively.
  • the module is electrically connected, the other end of the precharge contactor is electrically connected to one end of the precharge resistor, the other ends of the main positive contactor and the precharge resistor are electrically connected to the voltage dividing module respectively, and the other end of the main negative contactor is respectively It is electrically connected to one end of the external load, the voltage dividing module and the fast charging negative contactor.
  • the other end of the fast charging negative contactor is electrically connected to one end of the voltage dividing module and the external load respectively.
  • the voltage dividing module is electrically connected to the sampling module.
  • the voltage dividing module includes a first switch, one end of the first switch is electrically connected to the main positive contactor and the other end of the precharge resistor respectively, the other end of the first switch is electrically connected to one end of the third resistor, and the third resistor
  • the other end of the fourth resistor is electrically connected to the sampling module and one end of the fourth resistor.
  • the other end of the fourth resistor is electrically connected to the sampling module and one end of the fifth resistor.
  • the other end of the fifth resistor is electrically connected to the sampling module and one end of the sixth resistor.
  • the other end of the sixth resistor is electrically connected to one end of the third switch, the other end of the third switch is electrically connected to the external load, the other end of the main negative contactor and one end of the fast charging negative contactor respectively, the eighth resistor and the ninth resistor
  • One end of the eighth resistor is electrically connected, the other end of the eighth resistor is electrically connected to the sampling module and one end of the seventh resistor respectively, the other end of the seventh resistor is electrically connected to one end of the second switch, the other end of the second switch is electrically connected to the other end of the fast charging positive contactor Electrically connected, the other end of the ninth resistor is electrically connected to the sampling module and one end of the tenth resistor respectively, the other end of the tenth resistor is electrically connected to one end of the fourth switch, the other end of the fourth switch is electrically connected to the other end of the fast charging negative contactor sexual connection.
  • the sampling module includes a low-voltage power supply.
  • One end of the low-voltage power supply is electrically connected to the power isolation module.
  • the other end of the power isolation module is electrically connected to the negative pole of the high-voltage power supply and the data processing unit.
  • the data processing unit is respectively connected to the voltage dividing module and The data isolation module is electrically connected, and the data isolation module is electrically connected to the controller.
  • the data processing unit includes a voltage reference source whose two ends are electrically connected to the power isolation module, the first differential sampling unit, the second differential sampling unit, the third differential sampling unit and the first end of the fourth differential sampling unit.
  • the first differential sampling unit The second ends of the unit, the second differential sampling unit, the third differential sampling unit and the fourth differential sampling unit are electrically connected to the data isolation module respectively.
  • the data processing unit also includes a single-ended end whose first end is electrically connected to the power isolation module.
  • second terminal of the first differential sampling unit is electrically connected to the other end of the third resistor
  • the second end of the second differential sampling unit is electrically connected to the other end of the sixth resistor
  • the second end of the third differential sampling unit is electrically connected to the other end of the eighth resistor
  • the fourth The second end of the differential sampling unit is electrically connected to the other end of the ninth resistor
  • the second end and the third end of the single-ended sampling unit are electrically connected to the other end of the second resistor and the negative electrode of the high-voltage power supply respectively.
  • the other end of the main positive relay is electrically connected to one end of the first external Y capacitor and the external X capacitor
  • the other end of the main negative relay is electrically connected to one end of the second external Y capacitor and the other end of the external X capacitor.
  • the other end of the external Y capacitor is electrically connected to the other end of the second external Y capacitor.
  • the first differential sampling unit, the second differential sampling unit, the third differential sampling unit and the fourth differential sampling unit respectively obtain the first sampling point voltage
  • the single-ended sampling unit obtains the voltage of the fifth sampling point.
  • the controller is used to process the first sampling point voltage, the second sampling point voltage, the third sampling point voltage, the fourth sampling point voltage and the fifth sampling point voltage.
  • the second embodiment of the present invention provides a method for diagnosing the contact status of a high-voltage upper and lower electrical contactor based on the first embodiment, which is executed by a device for diagnosing the contact status of a high-voltage upper and lower electrical contactor described in the first embodiment. , the method includes:
  • the first switch K 1 , the second switch K 2 , the third switch K 3 and the fourth switch K 4 of the voltage dividing module are controlled to be disconnected;
  • the fifth sampling point voltage V 5 is obtained through the single-ended sampling unit of the data processing unit, and the AP terminal voltage V AP is obtained through the fifth sampling point voltage V 5 .
  • R 1 is the resistance of the first resistor
  • R 2 is the resistance of the second resistor
  • the first sampling point voltage V 1 and the third sampling point voltage V 3 are obtained respectively through the first differential sampling unit and the third differential sampling unit of the data processing unit.
  • the BP terminal voltage V BP is determined through the first sampling point voltage V 1 .
  • the third sampling point voltage V 3 determines the CP terminal voltage V CP :
  • V BP V rEf +V 1 *(R 3 +R 4 )/R 4
  • V CP V rEf +V 3 *(R 7 +R 8 )/R 8
  • R 3 is the third resistor value
  • R 4 is the fourth resistor value
  • R 7 is the seventh resistor value
  • R 8 is the eighth resistor value
  • V rEf is the high-voltage side voltage reference source to generate a stable The reference voltage.
  • the second sampling point voltage V 2 is obtained through the second differential sampling unit of the data processing unit, and the DP terminal voltage V DP is determined through the second sampling point voltage V 2 :
  • V DP V rEf +V 2 *(R 5 +R 6 )/R 5
  • R 5 is the resistance value of the fifth resistor
  • R 6 is the resistance value of the sixth resistor.
  • the main negative contactor has a contact sticking fault
  • V EP V rEf +V 4 *(R 9 +R 10 )/R 9
  • R 9 is the resistance value of the ninth resistor
  • R 10 is the resistance value of the tenth resistor.
  • the main negative contactor has a contact sticking fault
  • the vehicle After the high voltage is powered on, the vehicle is mainly divided into two modes: discharge and fast charge. As shown in Figure 4, in the discharge mode, the main positive and main negative contactors are closed. At this time, you only need to diagnose the open circuit status of the main positive and main negative. In fast charge, In mode, charging positive, main negative, and charging negative are closed. At this time, you only need to diagnose the open circuit status of the contactor contacts. Methods include:
  • the fifth sampling point voltage V 5 is obtained through the single-ended sampling unit of the data processing unit, and the AP terminal voltage V AP is obtained through the fifth sampling point voltage V 5 :
  • V AP V 5 *(R 1 +R 2 )/R 2 .
  • the first sampling point voltage V 1 and the second sampling point voltage V 2 are respectively obtained through the first differential sampling unit and the second differential sampling unit of the data processing unit, and are determined by the first sampling point voltage V 1 BM terminal voltage V BM , determine the DM terminal voltage V DM through the second sampling point voltage V 2 :
  • V BM V 1 *(R 3 +R 4 )/R 4
  • V DM V 2 *(R 5 +R 6 )/R 5
  • V link V BM -V DM
  • At least one of the main positive contactor and the main negative contactor has a contact sticking fault
  • V dclink V CM -V EM
  • At least one of the charging positive contactor, main negative contactor and charging negative contactor has a contact sticking failure
  • the third embodiment of the present invention provides a schematic structural diagram of a vehicle based on the first embodiment.
  • the vehicle includes a controller 50, a memory 51, an input device 52, an output device 53 and a high-voltage on/off power supply.
  • Contactor contact status diagnosis device 54 ; the number of controllers 50 in the vehicle can be one or more, one controller 50 is taken as an example in Figure 5; the controller 50, memory 51, input device 52, and output device in the vehicle 53 and the high-voltage upper and lower electrical contactor contact status diagnosis device 54 can be connected through a bus or other means. In Figure 5, the connection through the bus is taken as an example.
  • Contactor fault detection device 55 is used to detect faults on the main positive contactor, main negative contactor, precharge contactor, fast charge positive contactor and fast charge negative contactor;
  • the memory 51 serves as a computer-readable storage medium , can be used to store software programs, computer executable programs and modules, such as program instructions/modules corresponding to the contactor fault detection method in the embodiment of the present invention.
  • the controller 50 executes the software programs, instructions and modules stored in the memory 51 to execute various functional applications and data processing of the vehicle, that is, to implement the above contactor fault detection method.
  • the memory 51 may mainly include a stored program area and a stored data area, where the stored program area may store an operating system and at least one application program required for a function; the stored data area may store data created based on the use of the terminal, etc.
  • the memory 51 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.
  • the memory 51 may further include a remote device relative to the controller 50 These remote memories can be connected to the vehicle via a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
  • the input device 52 may be used to receive input of numeric or character information and to generate key signal inputs related to user settings and function control of the vehicle.
  • the output device 53 may include a display device such as a display screen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

一种高压上下电接触器触点状态诊断装置、方法及车辆，高压上下电接触器触点状态诊断装置包括高压电源，高压电源两端分别与保险丝、主负接触器和第二电阻的一端电性连接，保险丝另一端分别与快充正接触器、预充接触器、主正接触器和第一电阻电性连接，第一电阻和第二电阻的另一端相互连接且与采样模块电性连接，快充正接触器另一端分别与外部负载和分压模块电性连接。

Description

一种高压上下电接触器触点状态诊断装置、方法及车辆 技术领域
本发明公开了一种高压上下电接触器触点状态诊断装置、方法及车辆，属于车辆控制技术领域。
背景技术
动力电池是电动汽车的核心部件，是整车的动力来源，其电压高压几百伏，未了保证其高压输出的安全性，通常需要通过高压接触器连接到其正负输出端，进而实现高压输出的控制，如图1所示高压拓扑。但是高压接触器在异常工况或者操作不当的情况下会导致接触器粘连，一旦接触器粘连发生会造成安全隐患。因此在高压上电前和高压下电后需要进行接触器触点诊断，并确保诊断的可靠性。
当前动力电池高压系统接触器触点诊断的技术方案多数与负载状态和接触器闭合时序相关联，此时，接触器的触点状态判断与整车高压状态耦合在一起，对于接触器控制指令(如VCU)和执行指令(如BMS)不再一个控制器的情况下，执行指令端无法准确的知道整车高压状态和接触器执行时序，就会出现接触器触点状态误诊断的情况。
发明内容
针对现有技术的缺陷，本发明提出一种高压上下电接触器触点状态诊断装置、方法及车辆，解决电池高压负载如X电容等状态对触点电压采样的影响以及接触器触点状态误诊断的技术问题，从而提高在高压上下电过程时接触器触点状态诊断的准确性，避免误诊断事件。
本发明的技术方案如下：
根据本发明实施例的第一方面，提供一种高压上下电接触器触点状态诊断装置，包括高压电源，所述高压电源两端分别与保险丝、主负接触器和第二电阻的一端电性连接，所述保险丝另一端分别与快充正接触器、预充接触器、主正接触器和第一电阻电性连接，所述第一电阻和第二电阻的另一端相互连接且与采样模块电性连接，所述快充正接触器另一端分别与外部负载和分压模块电性连接，所述预充接触器另一端与预充电阻一端电性连接，所述主正接触器和预充电阻的另一端分别与分压模块电性电性连接，所述主负接触器的另一端分别与外部负载、分压模块和快充负接触器一端电性连接，所述快充负接触器另一端分别与分压模块一端和外部负载电性连接，所述分压模块与采样模块电性连接。
优选的是，所述分压模块包括第一开关，所述第一开关的一端分别与主正接触器和预充电阻的另一端电性连接，所述第一开关的另一端与第三电阻一端电性连接，所述第三电阻另一端分别与采样模块和第四电阻一端电性连接，所述第四电阻另一端分别与采样模块和第五电阻一端电性连接，所述第五电阻另一端分别与采样模块和第六电阻一端电性连接，所述第六电阻另一端与第三开关一端电性连接，所述第三开关另一端分别与外部负载、主负接触器的另一端和快充负接触器一端电性连接，所述第八电阻和第九电阻一端电性连接，所述第八电阻另一端分别与采样模块和第七电阻一端电性连接，所述第七电阻另一 端与第二开关一端电性连接，所述第二开关另一端与快充正接触器另一端电性连接，所述第九电阻另一端分别与采样模块和第十电阻一端电性连接，所述第十电阻另一端与第四开关一端电性连接，所述第四开关另一端与快充负接触器另一端电性连接。
优选的是，所述采样模块包括低压电源，所述低压电源与电源隔离模块一端电性连接，所述电源隔离模块另一端分别与高压电源负极和数据处理单元电性连接，所述数据处理单元分别与分压模块和数据隔离模块电性连接，所述数据隔离模块与控制器电性连接。
优选的是，所述数据处理单元包括两端分别与电源隔离模块、第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元第一端电性连接的电压基准源，所述第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元的第二端分别与数据隔离模块电性连接，所述数据处理单元还包括第一端与电源隔离模块电性连接的单端采样单元，所述第一差分采样单元的第二端与第三电阻另一端电性连接，所述第二差分采样单元的第二端与第六电阻另一端电性连接，所述第三差分采样单元的第二端与第八电阻另一端电性连接，所述第四差分采样单元的第二端与第九电阻另一端电性连接，所述单端采样单元的第二端和第三端分别与第二电阻的另一端和高压电源负极电性连接。
优选的是，所述主正继电器的另一端与第一外部Y电容和外部X电容一端电性连接，所述主负继电器的另一端与第二外部Y电容一端和外部X电容另一端电性连接，所述第一外部Y电容的另一端和第二外部Y电容的另一端电性连接，所述第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元分别获取第一采样点电压、第二采样点电压、第三采样点电压和第四采样点电压，所述单端采样单元获取第五采样点电压。
根据本发明实施例的第二方面，提供一种高压上下电接触器触点状态诊断 方法，其特征在于，由第一方面所述的一种高压上下电接触器触点状态诊断装置执行，所述方法包括：
接收到上电或下电指令时，控制所述分压模块的第一开关、第二开关、第三开关和第四开关的断开；
通过所述数据处理单元的单端采样单元获取第五采样点电压，通过所述第五采样点电压得到AP端电压；
控制所述分压模块的第一开关和第二开关闭合，所述第三开关和第四开关断开；
通过所述数据处理单元的第一差分采样单元和第三差分采样单元分别获取第一采样点电压和第三采样点电压，通过所述第一采样点电压确定BP端电压，通过所述第三采样点电压确定CP端电压；
通过所述AP端电压与BP端电压差值的绝对值判断是否小于第一预设值：
是，所述主正接触器为触点黏连故障；
否，所述主正接触器无故障；
通过所述AP端电压与CP端电压差值的绝对值判断是否小于第二预设值：
是，所述充电正接触器为触点黏连故障；
否，所述充电正接触器无故障。
优选的是，还包括：
控制所述分压模块的第一开关和第二开关断开，所述第三开关和第四开关闭合；
通过所述数据处理单元的第二差分采样单元获取第二采样点电压，通过所述第二采样点电压确定DP端电压；
通过所述DP端电压判断是否小于第四预设值：
是，所述主负接触器为触点黏连故障；
否，所述主负接触器无故障；
当所述主负接触器和主正接触器均无故障时，闭合所述主负接触器，通过所述数据处理单元的第四差分采样单元获取第四采样点电压，通过所述第四采样点电压确定EP端电压；
通过所述DP端电压判断是否小于第四预设值：
是，所述主负接触器为触点黏连故障；
否，所述主负接触器无故障；
优选的是，还包括：
接收到放电或充电指令时，控制所述分压模块的第一开关、第二开关、第三开关和第四开关的闭合；
通过所述数据处理单元的单端采样单元获取第五采样点电压，通过所述第五采样点电压得到AP端电压；
当收到放电指令时，通过所述数据处理单元的第一差分采样单元和第二差分采样单元分别获取第一采样点电压和第二采样点电压，通过所述第一采样点电压确定BM端电压，通过所述第二采样点电压确定DM端电压；
通过所述BM端电压和DM端电压确定电池负载端电压；
通过所述AP端电压与电池负载端电压差值的绝对值判断是否小于第五预设值：
是，所述主正接触器和主负接触器至少一个为触点黏连故障；
否，所述主正接触器和主负接触器均为无故障。
优选的是，还包括：
当收到充电指令时，通过所述数据处理单元的第三差分采样单元和第四差分采样单元分别获取第三采样点电压和第四采样点电压，通过所述第三采样点电压确定CM端电压，通过所述第四采样点电压确定EM端电压；
通过所述CM端电压和EM端电压确定电池充电负载端电压；
通过所述AP端电压与电池负载端电压差值的绝对值判断是否大于第五预 设值：
是，所述充电正接触器、主负接触器和充电负接触器至少一个为触点黏连故障；
否，所述充电正接触器、主负接触器和充电负接触器均为无故障。
根据本发明实施例的第三方面，提供一种车辆，其特征在于，所述车辆包括：
第一方面所述的高压上下电接触器触点状态诊断装置，用于分别对主正接触器、主负接触器、预充接触器、快充正接触器和快充负接触器进行故障检测；
一个或多个控制器；
存储装置，用于存储一个或多个程序，
当所述一个或多个程序被所述一个或多个控制器执行，使得所述一个或多个控制器实现第二方面所述的高压上下电接触器触点状态诊断方法。
本发明相对于现有而言具有的有益效果：
本发明公开了一种高压上下电接触器触点状态诊断装置、方法及车辆，通过对所有电压采样参考电池负极参考点，相比两个参考点的方案，降低高低隔离设计的复杂性；提供一个电压基准源，主正、主负、充电正、充电负外侧电压均参考这个基准源进行采样，同时可以采集LINK电压和DCLINK电压，通过比较接触器触点前后电压、LINK电压值、DCLINK电压值进而判断触点状态；每个高压采样回路有开关控制，正极接触器和负极接触器触点电压分时采样，使得外部负载状态与采样回路无关联，采样结果不受外部负载状态影响，同时提高接触器触点状态诊断的准确性，避免负载的干扰导致误诊断。
附图说明
图1是本发明一种高压上下电接触器触点状态诊断装置的电气连接图。
图2是一种高压上下电接触器触点状态诊断装置中采样模块的电气连接图。
图3是本发明一种高压上下电接触器触点状态诊断方法的流程图。
图4是本发明一种高压上下电接触器触点状态诊断方法的流程图。
图5是本发明一种车辆的结构框图。
具体实施方式
以下根据附图1-5对本发明做进一步说明：
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
如图1所示，本发明第一实施例在现有技术的基础上提供了一种高压上下电接触器触点状态诊断装置，包括高压电源，高压电源两端分别与保险丝、主负接触器和第二电阻的一端电性连接，保险丝另一端分别与快充正接触器、预 充接触器、主正接触器和第一电阻电性连接，第一电阻和第二电阻的另一端相互连接且与采样模块电性连接，快充正接触器另一端分别与外部负载和分压模块电性连接，预充接触器另一端与预充电阻一端电性连接，主正接触器和预充电阻的另一端分别与分压模块电性电性连接，主负接触器的另一端分别与外部负载、分压模块和快充负接触器一端电性连接，快充负接触器另一端分别与分压模块一端和外部负载电性连接，分压模块与采样模块电性连接。
其中，分压模块包括第一开关，第一开关的一端分别与主正接触器和预充电阻的另一端电性连接，第一开关的另一端与第三电阻一端电性连接，第三电阻另一端分别与采样模块和第四电阻一端电性连接，第四电阻另一端分别与采样模块和第五电阻一端电性连接，第五电阻另一端分别与采样模块和第六电阻一端电性连接，第六电阻另一端与第三开关一端电性连接，第三开关另一端分别与外部负载、主负接触器的另一端和快充负接触器一端电性连接，第八电阻和第九电阻一端电性连接，第八电阻另一端分别与采样模块和第七电阻一端电性连接，第七电阻另一端与第二开关一端电性连接，第二开关另一端与快充正接触器另一端电性连接，第九电阻另一端分别与采样模块和第十电阻一端电性连接，第十电阻另一端与第四开关一端电性连接，第四开关另一端与快充负接触器另一端电性连接。
如图2所示，采样模块包括低压电源，低压电源与电源隔离模块一端电性连接，电源隔离模块另一端分别与高压电源负极和数据处理单元电性连接，数据处理单元分别与分压模块和数据隔离模块电性连接，数据隔离模块与控制器电性连接。数据处理单元包括两端分别与电源隔离模块、第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元第一端电性连接的电压基准源，第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元的第二端分别与数据隔离模块电性连接，数据处理单元还包括第一端与电源隔离模块电性连接的单端采样单元，第一差分采样单元的第二端 与第三电阻另一端电性连接，第二差分采样单元的第二端与第六电阻另一端电性连接，第三差分采样单元的第二端与第八电阻另一端电性连接，第四差分采样单元的第二端与第九电阻另一端电性连接，单端采样单元的第二端和第三端分别与第二电阻的另一端和高压电源负极电性连接。
本实施例中主正继电器的另一端与第一外部Y电容和外部X电容一端电性连接，主负继电器的另一端与第二外部Y电容一端和外部X电容另一端电性连接，第一外部Y电容的另一端和第二外部Y电容的另一端电性连接，第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元分别获取第一采样点电压、第二采样点电压、第三采样点电压和第四采样点电压，单端采样单元获取第五采样点电压。控制器用于对第一采样点电压、第二采样点电压、第三采样点电压、第四采样点电压和第五采样点电压进行处理。
本发明第二实施例在第一实施例的基础上提供了一种高压上下电接触器触点状态诊断方法，由第一实施例所述的一种高压上下电接触器触点状态诊断装置执行，所述方法包括：
接收到上电或下电指令时，如图3所示，控制分压模块的第一开关K1、第二开关K2、第三开关K3和第四开关K4的断开；
通过数据处理单元的单端采样单元获取第五采样点电压V5，通过第五采样点电压V5得到AP端电压VAP，VAP为电池电压，并判断电池总电压的有效性：
VAP＝V5*(R1+R2)/R2
其中，R1为第一电阻阻值，R2为第二电阻阻值。
控制分压模块的第一开关K1和第二开关K2闭合，第三开关K3和第四开关K4断开；
通过数据处理单元的第一差分采样单元和第三差分采样单元分别获取第一采样点电压V1和第三采样点电压V3，通过第一采样点电压V1确定BP端电压VBP，通过第三采样点电压V3确定CP端电压VCP：
VBP＝VrEf+V1*(R3+R4)/R4
VCP＝VrEf+V3*(R7+R8)/R8
其中，R3为第三电阻阻值、R4为第四电阻阻值、R7为第七电阻阻值、R8为第八电阻阻值，VrEf为高压侧电压基准源产生一个稳定的基准电压。
通过AP端电压VAP与BP端电压VBP差值的绝对值判断是否小于第一预设值：
是，主正接触器为触点黏连故障；
否，主正接触器无故障；
通过AP端电压VAP与CP端电压VCP差值的绝对值判断是否小于第二预设值：
是，充电正接触器为触点黏连故障；
否，充电正接触器无故障。
控制分压模块的第一开关K1和第二开关K2断开，第三开关K3和第四开关K4闭合；
通过数据处理单元的第二差分采样单元获取第二采样点电压V2，通过第二采样点电压V2确定DP端电压VDP：
VDP＝VrEf+V2*(R5+R6)/R5
其中：R5为第五电阻阻值、R6为第六电阻阻值。
通过DP端电压VDP判断是否小于第三预设值：
是，主负接触器为触点黏连故障；
否，主负接触器无故障；
当所述主负接触器和主正接触器均无故障时，闭合所述主负接触器，通过数据处理单元的第四差分采样单元获取第四采样点电压V4，通过第四采样点电压V2确定EP端电压VEP：
VEP＝VrEf+V4*(R9+R10)/R9
其中：R9为第九电阻阻值、R10为第十电阻阻值。
通过DP端电压VEP判断是否小于第四预设值：
是，主负接触器为触点黏连故障；
否，主负接触器无故障；
断开主负，接触器触点诊断完成。
高压上电后车辆主要分为放电和快充两种模式，如图4所示，在放电模式下主正和主负接触器闭合，此时只需诊断主正和主负的开路状态，在快充模式下充电正、主负、充电负闭合，此时只需诊断接触器触点开路状态，方法包括：
接收到放电或充电指令时，控制分压模块的第一开关K1、第二开关K2、第三开关K3和第四开关K4的闭合；
通过数据处理单元的单端采样单元获取第五采样点电压V5，通过第五采样点电压V5得到AP端电压VAP：
VAP＝V5*(R1+R2)/R2。
当收到放电指令时，通过数据处理单元的第一差分采样单元和第二差分采样单元分别获取第一采样点电压V1和第二采样点电压V2，通过第一采样点电压V1确定BM端电压VBM，通过第二采样点电压V2确定DM端电压VDM：
VBM＝V1*(R3+R4)/R4
VDM＝V2*(R5+R6)/R5
通过BM端电压VBM和DM端电压VDM确定电池负载端电压Vlink：
Vlink＝VBM-VDM
通过AP端电压VAP与电池负载端电压Vlink差值的绝对值判断是否小于第五预设值：
是，主正接触器和主负接触器至少一个为触点黏连故障；
否，主正接触器和主负接触器均为无故障。
当收到充电指令时，通过数据处理单元的第三差分采样单元和第四差分采样单元分别获取第三采样点电压V3和第四采样点电压V4，通过第三采样点电压V3确定CM端电压VCM，通过第四采样点电压V4确定EM端电压VEM
VCM＝V3*(R7+R8)/R8
VEM＝V4*(R9+R10)/R9
通过CM端电压和EM端电压确定电池充电负载端电压Vdclink：
Vdclink＝VCM-VEM
通过AP端电压与电池负载端电压差值的绝对值判断是否大于第五预设值：
是，充电正接触器、主负接触器和充电负接触器至少一个为触点黏连故障；
否，充电正接触器、主负接触器和充电负接触器均为无故障；
本发明第三实施例在第一实施例的基础上提供了一种车辆的结构示意图，如图5所示，该车辆包括控制器50、存储器51、输入装置52、输出装置53和高压上下电接触器触点状态诊断装置54；车辆中控制器50的数量可以是一个或多个，图5中以一个控制器50为例；车辆中的控制器50、存储器51、输入装置52、输出装置53和高压上下电接触器触点状态诊断装置54可以通过总线或其他方式连接，图5中以通过总线连接为例。
接触器故障检测装置55，用于对主正接触器、主负接触器、预充接触器、快充正接触器和快充负接触器进行故障检测；存储器51作为一种计算机可读存储介质，可用于存储软件程序、计算机可执行程序以及模块，如本发明实施例中的接触器故障检测方法对应的程序指令/模块。控制器50通过运行存储在存储器51中的软件程序、指令以及模块，从而执行车辆的各种功能应用以及数据处理，即实现上述的接触器故障检测方法。
存储器51可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器51可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储器51可进一步包括相对于控制器50远程设 置的存储器，这些远程存储器可以通过网络连接至车辆。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
输入装置52可用于接收输入的数字或字符信息，以及产生与车辆的用户设置以及功能控制有关的键信号输入。输出装置53可包括显示屏等显示设备。
注意，上述仅为本发明的较佳实施例及所运用技术原理。本领域技术人员会理解，本发明不限于这里所述的特定实施例，对本领域技术人员来说能够进行各种明显的变化、重新调整和替代而不会脱离本发明的保护范围。因此，虽然通过以上实施例对本发明进行了较为详细的说明，但是本发明不仅仅限于以上实施例，在不脱离本发明构思的情况下，还可以包括更多其他等效实施例，而本发明的范围由所附的权利要求范围决定。
尽管本发明的实施方案已公开如上，但其并不仅仅限于说明书和实施方式中所列运用。它完全可以被适用于各种适合本发明的领域。对于熟悉本领域的人员而言，可容易地实现另外的修改。因此在不背离权利要求及等同范围所限定的一般概念下，本发明并不限于特定的细节和这里示出与描述的图例。

Claims (10)

  1. 一种高压上下电接触器触点状态诊断装置，其特征在于，包括高压电源，所述高压电源两端分别与保险丝、主负接触器和第二电阻的一端电性连接，所述保险丝另一端分别与快充正接触器、预充接触器、主正接触器和第一电阻电性连接，所述第一电阻和第二电阻的另一端相互连接且与采样模块电性连接，所述快充正接触器另一端分别与外部负载和分压模块电性连接，所述预充接触器另一端与预充电阻一端电性连接，所述主正接触器和预充电阻的另一端分别与分压模块电性电性连接，所述主负接触器的另一端分别与外部负载、分压模块和快充负接触器一端电性连接，所述快充负接触器另一端分别与分压模块一端和外部负载电性连接，所述分压模块与采样模块电性连接。
  2. 根据权利要求1所述的一种高压上下电接触器触点状态诊断装置，其特征在于，所述分压模块包括第一开关，所述第一开关的一端分别与主正接触器和预充电阻的另一端电性连接，所述第一开关的另一端与第三电阻一端电性连接，所述第三电阻另一端分别与采样模块和第四电阻一端电性连接，所述第四电阻另一端分别与采样模块和第五电阻一端电性连接，所述第五电阻另一端分别与采样模块和第六电阻一端电性连接，所述第六电阻另一端与第三开关一端电性连接，所述第三开关另一端分别与外部负载、主负接触器的另一端和快充负接触器一端电性连接，所述第八电阻和第九电阻一端电性连接，所述第八电阻另一端分别与采样模块和第七电阻一端电性连接，所述第七电阻另一端与第二开关一端电性连接，所述第二开关另一端与快充正接触器另一端电性连接，所述第九电阻另一端分别与采样模块和第十电阻一端电性连接，所述第十电阻另一端与第四开关一端电性连接，所述第四开关另一端与快充负接触器另一端电性连接。
  3. 根据权利要求2所述的一种高压上下电接触器触点状态诊断装置，其特 征在于，所述采样模块包括低压电源，所述低压电源与电源隔离模块一端电性连接，所述电源隔离模块另一端分别与高压电源负极和数据处理单元电性连接，所述数据处理单元分别与分压模块和数据隔离模块电性连接，所述数据隔离模块与控制器电性连接。
  4. 根据权利要求3所述的一种高压上下电接触器触点状态诊断装置，其特征在于，所述数据处理单元包括两端分别与电源隔离模块、第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元第一端电性连接的电压基准源，所述第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元的第三端分别与数据隔离模块电性连接，所述数据处理单元还包括第一端与电源隔离模块电性连接的单端采样单元，所述第一差分采样单元的第二端与第三电阻另一端电性连接，所述第二差分采样单元的第二端与第六电阻另一端电性连接，所述第三差分采样单元的第二端与第八电阻另一端电性连接，所述第四差分采样单元的第二端与第九电阻另一端电性连接，所述单端采样单元的第二端和第三端分别与第二电阻的另一端和高压电源负极电性连接。
  5. 根据权利要求4所述的一种高压上下电接触器触点状态诊断装置，其特征在于，所述主正继电器的另一端与第一外部Y电容和外部X电容一端电性连接，所述主负继电器的另一端与第二外部Y电容一端和外部X电容另一端电性连接，所述第一外部Y电容的另一端和第二外部Y电容的另一端电性连接，所述第一差分采样单元、第二差分采样单元、第三差分采样单元和第四差分采样单元分别获取第一采样点电压、第二采样点电压、第三采样点电压和第四采样点电压，所述单端采样单元获取第五采样点电压。
  6. 一种高压上下电接触器触点状态诊断方法，其特征在于，由权利要求1-5中任意一项所述的一种高压上下电接触器触点状态诊断装置执行，所述方法包括：
    接收到上电或下电指令时，控制所述分压模块的第一开关、第二开关、第三开关和第四开关的断开；
    通过所述数据处理单元的单端采样单元获取第五采样点电压，通过所述第五采样点电压得到AP端电压；
    控制所述分压模块的第一开关和第二开关闭合，所述第三开关和第四开关断开；
    通过所述数据处理单元的第一差分采样单元和第三差分采样单元分别获取第一采样点电压和第三采样点电压，通过所述第一采样点电压确定BP端电压，通过所述第三采样点电压确定CP端电压；
    通过所述AP端电压与BP端电压差值的绝对值判断是否小于第一预设值：
    是，所述主正接触器为触点黏连故障；
    否，所述主正接触器无故障；
    通过所述AP端电压与CP端电压差值的绝对值判断是否小于第二预设值：
    是，所述充电正接触器为触点黏连故障；
    否，所述充电正接触器无故障。
  7. 根据权利要求6所述的一种高压上下电接触器触点状态诊断方法，其特征在于，还包括：
    控制所述分压模块的第一开关和第二开关断开，所述第三开关和第四开关闭合；
    通过所述数据处理单元的第二差分采样单元获取第二采样点电压，通过所述第二采样点电压确定DP端电压；
    通过所述DP端电压判断是否小于第四预设值：
    是，所述主负接触器为触点黏连故障；
    否，所述主负接触器无故障；
    当所述主负接触器和主正接触器均无故障时，闭合所述主负接触器，通过 所述数据处理单元的第四差分采样单元获取第四采样点电压，通过所述第四采样点电压确定EP端电压；
    通过所述DP端电压判断是否小于第四预设值：
    是，所述主负接触器为触点黏连故障；
    否，所述主负接触器无故障；
  8. 根据权利要求7所述的一种高压上下电接触器触点状态诊断方法，其特征在于，还包括：
    接收到放电或充电指令时，控制所述分压模块的第一开关、第二开关、第三开关和第四开关的闭合；
    通过所述数据处理单元的单端采样单元获取第五采样点电压，通过所述第五采样点电压得到AP端电压；
    当收到放电指令时，通过所述数据处理单元的第一差分采样单元和第二差分采样单元分别获取第一采样点电压和第二采样点电压，通过所述第一采样点电压确定BM端电压，通过所述第二采样点电压确定DM端电压；
    通过所述BM端电压和DM端电压确定电池负载端电压；
    通过所述AP端电压与电池负载端电压差值的绝对值判断是否小于第五预设值：
    是，所述主正接触器和主负接触器至少一个为触点黏连故障；
    否，所述主正接触器和主负接触器均为无故障。
  9. 根据权利要求8所述的一种高压上下电接触器触点状态诊断方法，其特征在于，还包括：
    当收到充电指令时，通过所述数据处理单元的第三差分采样单元和第四差分采样单元分别获取第三采样点电压和第四采样点电压，通过所述第三采样点电压确定CM端电压，通过所述第四采样点电压确定EM端电压；
    通过所述CM端电压和EM端电压确定电池充电负载端电压；
    通过所述AP端电压与电池负载端电压差值的绝对值判断是否大于第五预设值：
    是，所述充电正接触器、主负接触器和充电负接触器至少一个为触点黏连故障；
    否，所述充电正接触器、主负接触器和充电负接触器均为无故障。
  10. 一种车辆，其特征在于，所述车辆包括：
    权利要求1-5中任意一项所述的高压上下电接触器触点状态诊断装置，用于分别对主正接触器、主负接触器、预充接触器、快充正接触器和快充负接触器进行故障检测；
    一个或多个控制器；
    存储装置，用于存储一个或多个程序，
    当所述一个或多个程序被所述一个或多个控制器执行，使得所述一个或多个控制器实现如权利要求3-9中任一所述的高压上下电接触器触点状态诊断方法。
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