CN106427614A - System and method for total voltage sampling and relay diagnosis for battery system of electric vehicle - Google Patents

System and method for total voltage sampling and relay diagnosis for battery system of electric vehicle Download PDF

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Publication number
CN106427614A
CN106427614A CN201610786488.4A CN201610786488A CN106427614A CN 106427614 A CN106427614 A CN 106427614A CN 201610786488 A CN201610786488 A CN 201610786488A CN 106427614 A CN106427614 A CN 106427614A
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China
Prior art keywords
voltage
relay
pole relay
positive pole
sampled point
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Pending
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CN201610786488.4A
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Chinese (zh)
Inventor
郑剑
王成龙
从长杰
王驰伟
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Tianjin EV Energies Co Ltd
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Tianjin EV Energies Co Ltd
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Priority to CN201610786488.4A priority Critical patent/CN106427614A/en
Publication of CN106427614A publication Critical patent/CN106427614A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
    • 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
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • 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
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • 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
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a system and method for total voltage sampling and relay diagnosis for a battery system of an electric vehicle. The total voltage sampling and the relay diagnosis are acquired through four voltage sampling points; the combination of the four sampling points is realized through two switchable switches, so that the total voltage of the battery system can be obtained from combined voltages, and through the comparison of collected voltage values, the state of a relay can be obtained. The total voltage can be collected without needing to close the relay, so that the relay adhesion can be avoided, and the state of the relay can be judged by comparing the voltage values of the front end and the rear end of the relay.

Description

The sampling of electric vehicle battery system total voltage and relay diagnostic system and method
Technical field
The invention belongs to the collection of electrokinetic cell BMS stagnation pressure and fault diagnosis field, especially relates to a kind of electronic The sampling of automotive battery system total voltage and relay diagnostic system and method.
Background technology
Global oil exhaustion leads to contention increasingly fierce, and tapping a new source of energy will be the project that future period is widely paid close attention to And target.Development new forms of energy overall background under electrokinetic cell exploitation be duty-bound, but electrokinetic cell in use according to Rely the open-circuit voltage to gather battery in BMS, and the working condition of diagnosis main relay.
Content of the invention
In view of this, the invention is directed to a kind of electric vehicle battery system total voltage sampling and relay diagnosis System, for realizing the combination of four sampled points by two switchable switches, relatively can be obtained by the magnitude of voltage of collection Positive pole master bear and pre-charge-relay state.
For reaching above-mentioned purpose, the technical scheme of the invention is realized in：
A kind of electric vehicle battery system total voltage sampling and relay diagnostic system, including battery system, battery system Including the battery pack being sequentially connected, positive pole relay, load, negative pole relay, open manually by maintenance for internal battery pack series connection MSD Close, the loop of positive pole relay parallel connection pre-charge-relay and preliminary filling resistance composition, described battery anode and positive pole relay Between be provided with first voltage sampled point, be provided with second voltage sampled point between described battery electrode and negative pole relay, described It is provided with tertiary voltage sampled point between positive pole relay and load, be provided with the 4th voltage between described load and negative pole relay and adopt Sampling point, described four voltage sample points pass through wire connected battery management system respectively, be provided with and cut in described battery management system Change switch, described second voltage sampled point pass through first switching switch and sampling resistor connect first voltage sampled point, the 3rd Voltage sample point, described 4th voltage sample point pass through second switching switch and sampling resistor connect first voltage sampled point, Tertiary voltage sampled point.
With respect to prior art, a kind of electric vehicle battery system total voltage sampling described in the invention and relay Diagnostic system has the advantage that：
(1) whether quick diagnosis relay adhesion, just can diagnose relay in battery management system initialization procedure Adhesion, can complete to diagnose in 500ms after upper electricity.
(2) positive pole relay adhesion is avoided to cause negative pole relay adhesion, after lower electricity, high pressure can not cut off, and causes personnel to anticipate Outer electric shock.
(3) avoid positive pole relay not experience pre-charge process because after closure negative pole relay, cause transient high-current Insurance and car load electric machine controller etc. in impact battery system MSD.
Another object of the present invention is to proposing a kind of electric vehicle battery system total voltage sampling and relay diagnosis side Method, to realize diagnosing the adhesion of relay.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of electric vehicle battery system total voltage sampling and relay diagnostic method, specifically include following steps：
(1) gather the magnitude of voltage between each voltage sample point by switching switch control rule BMS；
(2) magnitude of voltage passing through contrast negative pole relay two ends judges the working condition of negative pole relay；
(3) magnitude of voltage passing through to contrast positive pole relay two ends judges positive pole relay and preliminary filling relay work shape State.
Further, described step (2) specifically includes following steps：
Judge whether the magnitude of voltage at negative pole relay two ends is equal, if equal, negative pole relay adhesion, if negative pole Relay front voltage is more than rear terminal voltage and rear terminal voltage is 0, then negative pole relay is normal.
Further, described step (3) specifically includes following steps：
Judge whether positive pole relay both end voltage value is equal, if equal, positive pole relay, preliminary filling relay glue Even, if positive pole relay front voltage is more than rear terminal voltage and is more than 0, pre-charge-relay adhesion, if positive pole relay Device front voltage is more than rear terminal voltage and rear terminal voltage is equal to 0, then positive pole relay, preliminary filling relay are normal.
A kind of described electric vehicle battery system total voltage sampling and relay diagnostic method and a kind of above-mentioned electric automobile The sampling of battery system total voltage and relay diagnostic system have the advantage that identical with respect to prior art, will not be described here.
Brief description
The accompanying drawing constituting the part of the invention is used for providing the invention is further understood, and the present invention creates The schematic description and description made is used for explaining the invention, does not constitute the improper restriction to the invention.? In accompanying drawing：
Fig. 1 is a kind of electric vehicle battery system total voltage sampling described in the invention embodiment and relay diagnosis system The structural representation of system；
Fig. 2 is a kind of electric vehicle battery system total voltage sampling and the relay diagnosis described in the invention embodiment The flow chart of method.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the invention and the feature in embodiment can To be mutually combined.
In the description of the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score, The orientation of instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship are Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than instruction Or the hint device of indication or element must have specific orientation, with specific azimuth configuration and operation, be not therefore understood that It is the restriction to the invention.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating Or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately It is described, " multiple " are meant that two or more.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly Connect；Can be to be mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition State concrete meaning in the invention for the term.
To describe the invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Figure 1, 2, a kind of electric vehicle battery system total voltage sampling and relay diagnostic system, including battery system System, battery pack that battery system includes being sequentially connected, positive pole relay, load, negative pole relay, internal battery pack series connection MSD Manual maintenance switch, positive pole relay parallel connection pre-charge-relay and preliminary filling resistance composition loop, described battery anode with It is provided with first voltage sampled point between positive pole relay, be provided with second voltage between described battery electrode and negative pole relay and adopt Sampling point, is provided with tertiary voltage sampled point between described positive pole relay and load, is provided between described load and negative pole relay 4th voltage sample point, described four voltage sample points pass through wire connected battery management system, described battery management system respectively It is provided with switching switch, described second voltage sampled point connects first voltage by the first switching switch and sampling resistor and adopts in system Sampling point, tertiary voltage sampled point, described 4th voltage sample point passes through the second switching switch and sampling resistor connects the first electricity Pressure sampled point, tertiary voltage sampled point.
The method flow of the system is as follows：
(1) the first switching switch, the second switching switch are connected first voltage sampled point, first voltage is gathered by BMS Magnitude of voltage V (1-2) between sampled point and second voltage sampled point and first voltage sampled point and the 4th voltage sample point it Between magnitude of voltage V (1-4)；(2) judge the relation of V (1-2) and V (1-4), if V (1-2)=V (1-4) is equal, negative pole continues Electrical equipment adhesion, if V (1-2)>V (1-4)=0, then negative pole relay is normal；
(2) the first switching switch is connected first voltage sampled point, first voltage sampled point and the second electricity are gathered by BMS Magnitude of voltage V (1-2) between pressure sampled point, then the first switching switch is connected tertiary voltage sampled point, gather first by BMS Magnitude of voltage V (3-2) between voltage sample point and second voltage sampled point；Judge the relation of V (1-2) and V (3-2), if V (1-2)=V (3-2) is equal, then positive pole (preliminary filling) relay adhesion, if V (1-2)>V(3-2)>0, then pre-charge-relay is viscous Even, if V (1-2)>V (3-2)=0, then positive pole (preliminary filling) relay is normal.
The stagnation pressure sampling of the present invention and relay diagnosis are all obtained by 4 road voltage sample points, by battery management system The combination of four sampled points realized by two switchable switches, and then the voltage being combined by these can learn that battery system is total Pressure, i.e. V (1-2), V (3-2), V (1-4), compares and can obtain positive pole relay, negative pole relay by the magnitude of voltage of collection And the state of pre-charge-relay is it is not necessary to diagnose relay adhesion when being pre-charged by electricity on high pressure.So can avoid In the case of positive pole relay adhesion, on high pressure during electricity closure negative pole relay, because the process not being pre-charged, cause to bear Pole relay adhesion, also avoids because precharge does not cause high current that car load electric machine controller and battery system are rushed simultaneously Hit.
The foregoing is only the preferred embodiment of the invention, not in order to limit the invention, all this Within the spirit of innovation and creation and principle, any modification, equivalent substitution and improvement made etc., should be included in the invention Protection domain within.

Claims (4)

1. a kind of electric vehicle battery system total voltage sampling and relay diagnostic system, including battery system, battery system bag Include the battery pack being sequentially connected, positive pole relay, load, negative pole relay, internal battery pack is connected MSD Manual maintenance switch, Positive pole relay parallel connection pre-charge-relay and preliminary filling resistance composition loop it is characterised in that：
It is provided with first voltage sampled point, described battery electrode and negative pole relay between described battery anode and positive pole relay It is provided with second voltage sampled point between device, between described positive pole relay and load, be provided with tertiary voltage sampled point, described load It is provided with the 4th voltage sample point and negative pole relay between, described four voltage sample points are managed by wire connected battery respectively System, is provided with switching switch in described battery management system, described second voltage sampled point passes through the first switching switch and adopts Sample resistance connect first voltage sampled point, tertiary voltage sampled point, described 4th voltage sample point pass through second switching switch with And sampling resistor connects first voltage sampled point, tertiary voltage sampled point.
2. a kind of sampling of electric vehicle battery system total voltage and relay diagnostic method it is characterised in that：Specifically include as follows Step：
(1) gather the magnitude of voltage between each voltage sample point by switching switch control rule BMS；
(2) magnitude of voltage passing through contrast negative pole relay two ends judges the working condition of negative pole relay；
(3) magnitude of voltage passing through to contrast positive pole relay two ends judges positive pole relay and the working condition of preliminary filling relay.
3. a kind of electric vehicle battery system total voltage sampling according to claim 1 and main relay diagnosis system, method, It is characterized in that：Described step (2) specifically includes following steps：
Judge whether the magnitude of voltage at negative pole relay two ends is equal, if equal, negative pole relay adhesion, if negative pole relay Device front voltage is more than rear terminal voltage and rear terminal voltage is 0, then negative pole relay is normal.
4. a kind of electric vehicle battery system total voltage sampling according to claim 1 and main relay diagnosis system, method, It is characterized in that：Described step (3) specifically includes following steps：
Judge whether positive pole relay both end voltage value is equal, if equal, positive pole relay and preliminary filling relay adhesion, such as Fruit positive pole relay front voltage is more than rear terminal voltage and is more than 0, then pre-charge-relay adhesion, if positive pole relay front end Voltage is more than rear terminal voltage and rear terminal voltage is equal to 0, then positive pole relay and preliminary filling relay are normal.
CN201610786488.4A 2016-08-31 2016-08-31 System and method for total voltage sampling and relay diagnosis for battery system of electric vehicle Pending CN106427614A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018171259A1 (en) * 2017-03-20 2018-09-27 华为技术有限公司 Detection circuit, method, and device
CN109490771A (en) * 2019-01-11 2019-03-19 珠海广通汽车有限公司 A kind of relay test method and electric relay detection device
CN109507476A (en) * 2018-12-25 2019-03-22 中国重汽集团济南动力有限公司 A kind of high voltage connector front and back end voltage detecting system
CN109839587A (en) * 2017-11-24 2019-06-04 中信国安盟固利动力科技有限公司 A kind of fault detection of battery system and positioning device and method
CN110568366A (en) * 2018-06-05 2019-12-13 广州小鹏汽车科技有限公司 Insulation circuit, battery pack leakage detection method and hardware detection method
CN111152659A (en) * 2019-12-25 2020-05-15 浙江合众新能源汽车有限公司 Battery pack high-voltage topological structure and relay adhesion detection method based on structure
CN111196159A (en) * 2020-01-20 2020-05-26 宁波吉利汽车研究开发有限公司 Low-voltage maintenance switch device, control method and vehicle
CN112255577A (en) * 2019-10-30 2021-01-22 蜂巢能源科技有限公司 Method and system for detecting contactor adhesion
CN113281642A (en) * 2017-02-23 2021-08-20 宁德时代新能源科技股份有限公司 Relay diagnosis circuit
CN114325502A (en) * 2021-11-30 2022-04-12 章鱼博士智能技术(上海)有限公司 Method and device for diagnosing pre-charging circuit and power battery system
WO2022082526A1 (en) * 2020-10-21 2022-04-28 深圳欣锐科技股份有限公司 Main negative relay detection system
WO2022242624A1 (en) * 2021-05-20 2022-11-24 中国第一汽车股份有限公司 Power distribution box for vehicle
WO2024041059A1 (en) * 2022-08-25 2024-02-29 深圳威迈斯新能源股份有限公司 Adhesion detection and voltage difference measurement circuit for relay
WO2024066551A1 (en) * 2022-09-30 2024-04-04 联合汽车电子有限公司 High-voltage sampling circuit of vehicle battery pack, relay diagnosis method, and pre-charging method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080233471A1 (en) * 2004-05-13 2008-09-25 Richard Aumayer Battery State Detection
CN104391241A (en) * 2014-10-13 2015-03-04 惠州市亿能电子有限公司 High-voltage relay state detection circuit of power battery and method thereof
CN104553813A (en) * 2014-12-16 2015-04-29 惠州市亿能电子有限公司 Electric automobile high-voltage power-on circuit and control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080233471A1 (en) * 2004-05-13 2008-09-25 Richard Aumayer Battery State Detection
CN104391241A (en) * 2014-10-13 2015-03-04 惠州市亿能电子有限公司 High-voltage relay state detection circuit of power battery and method thereof
CN104553813A (en) * 2014-12-16 2015-04-29 惠州市亿能电子有限公司 Electric automobile high-voltage power-on circuit and control method thereof

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113281642A (en) * 2017-02-23 2021-08-20 宁德时代新能源科技股份有限公司 Relay diagnosis circuit
CN113281642B (en) * 2017-02-23 2024-04-26 宁德时代新能源科技股份有限公司 Relay diagnosis circuit
CN108627765A (en) * 2017-03-20 2018-10-09 华为技术有限公司 A kind of detection circuit, method and apparatus
EP4306976A3 (en) * 2017-03-20 2024-04-10 Huawei Technologies Co., Ltd. Detection circuit, method, and apparatus
WO2018171259A1 (en) * 2017-03-20 2018-09-27 华为技术有限公司 Detection circuit, method, and device
EP3581950A4 (en) * 2017-03-20 2020-05-06 Huawei Technologies Co., Ltd. Detection circuit, method, and device
US11313908B2 (en) 2017-03-20 2022-04-26 Huawei Technologies Co., Ltd. Detection circuit, method, and apparatus
CN114325412A (en) * 2017-03-20 2022-04-12 华为技术有限公司 Detection circuit, method and device
CN109839587A (en) * 2017-11-24 2019-06-04 中信国安盟固利动力科技有限公司 A kind of fault detection of battery system and positioning device and method
CN109839587B (en) * 2017-11-24 2023-11-07 中信国安盟固利动力科技有限公司 Fault detection and positioning device and method for battery system
CN110568366A (en) * 2018-06-05 2019-12-13 广州小鹏汽车科技有限公司 Insulation circuit, battery pack leakage detection method and hardware detection method
CN109507476A (en) * 2018-12-25 2019-03-22 中国重汽集团济南动力有限公司 A kind of high voltage connector front and back end voltage detecting system
CN109490771A (en) * 2019-01-11 2019-03-19 珠海广通汽车有限公司 A kind of relay test method and electric relay detection device
CN112255577A (en) * 2019-10-30 2021-01-22 蜂巢能源科技有限公司 Method and system for detecting contactor adhesion
CN111152659B (en) * 2019-12-25 2021-09-10 浙江合众新能源汽车有限公司 Battery pack high-voltage topological structure and relay adhesion detection method based on structure
CN111152659A (en) * 2019-12-25 2020-05-15 浙江合众新能源汽车有限公司 Battery pack high-voltage topological structure and relay adhesion detection method based on structure
CN111196159A (en) * 2020-01-20 2020-05-26 宁波吉利汽车研究开发有限公司 Low-voltage maintenance switch device, control method and vehicle
WO2022082526A1 (en) * 2020-10-21 2022-04-28 深圳欣锐科技股份有限公司 Main negative relay detection system
WO2022242624A1 (en) * 2021-05-20 2022-11-24 中国第一汽车股份有限公司 Power distribution box for vehicle
CN114325502A (en) * 2021-11-30 2022-04-12 章鱼博士智能技术(上海)有限公司 Method and device for diagnosing pre-charging circuit and power battery system
WO2024041059A1 (en) * 2022-08-25 2024-02-29 深圳威迈斯新能源股份有限公司 Adhesion detection and voltage difference measurement circuit for relay
WO2024066551A1 (en) * 2022-09-30 2024-04-04 联合汽车电子有限公司 High-voltage sampling circuit of vehicle battery pack, relay diagnosis method, and pre-charging method

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Application publication date: 20170222