WO2020135718A1 - Procédé et appareil de gestion de la batterie - Google Patents

Procédé et appareil de gestion de la batterie Download PDF

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Publication number
WO2020135718A1
WO2020135718A1 PCT/CN2019/129217 CN2019129217W WO2020135718A1 WO 2020135718 A1 WO2020135718 A1 WO 2020135718A1 CN 2019129217 W CN2019129217 W CN 2019129217W WO 2020135718 A1 WO2020135718 A1 WO 2020135718A1
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WO
WIPO (PCT)
Prior art keywords
relay
fast charging
negative
positive
interface
Prior art date
Application number
PCT/CN2019/129217
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English (en)
Chinese (zh)
Inventor
岳志芹
王一龙
翁浩宇
孟伟
竺昂
贾驰宇
高欢
李旭
Original Assignee
长城汽车股份有限公司
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Application filed by 长城汽车股份有限公司 filed Critical 长城汽车股份有限公司
Publication of WO2020135718A1 publication Critical patent/WO2020135718A1/fr

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    • 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

Definitions

  • This application relates to the technical field of smart battery control, and in particular to a method and device for battery management.
  • the fast charging relay In the process of using new energy vehicles, the fast charging relay often sticks to the impact of large currents or is often overloaded, or the improper use will cause the fast charging relay to stick, but the fast charger sticking will cause the high voltage to directly connect to the load, which will bring huge Security risks.
  • the method for detecting whether the fast charging relay is stuck is usually a detection method that is connected to the main and negative relay parallel current detection table. This method is too complicated to implement, and there is no reasonable and simple detection method and timely fault reminder.
  • this application aims to propose a battery management method and a corresponding battery management device to solve the problem of how to accurately and easily detect whether the fast charging relay of a new energy vehicle is normally stuck and issue a fault reminder in time.
  • a battery management method includes:
  • the target voltage of multiple detection points around the fast charge relay deployed in the power distribution box is detected according to the preset detection rules
  • test report is output based on the judgment result.
  • determining whether the fast charging relay is faulty includes:
  • the detection points include: the positive interface of the fast charging positive relay, the negative interface of the fast charging positive relay, the positive interface of the fast charging negative relay, and the negative interface of the fast charging negative relay;
  • the detection points include: a positive interface of a fast charging positive relay, a negative interface of a fast charging positive relay, an interface of the negative high potential end of the power distribution box, and an interface of the negative low potential end of the power distribution box;
  • the method further includes:
  • the target voltages of multiple detection points deployed around the fast charging relay are detected according to a preset detection rule; according to the target The voltage is compared with the expected standard voltage to determine whether the fast charging relay is faulty; if there is no fault, a test report is output according to the judgment result.
  • the method and device described in the present application detect and compare with the expected voltage by deploying a detection point around the fast charging relay to accurately and easily detect whether the fast charging relay is stuck properly and provide a timely fault reminder.
  • Another object of the present application is to propose a battery management device to solve the problem of how to accurately and easily detect whether the fast charging relay of a new energy vehicle is normally stuck and issue a fault reminder in time.
  • a battery management device includes:
  • the startup module is used to detect the target voltage of multiple detection points around the fast charge relay deployed in the power distribution box according to the preset detection rules when the battery main positive and main negative contacts are detected to be closed;
  • the judging module is used to judge whether the fast charging relay is faulty according to the comparison between the target voltage and the expected standard voltage
  • the first output module is used to output a detection report according to the judgment result if there is no fault.
  • the judgment device includes:
  • the delay judgment sub-module is used for judging whether the fast charging relay is faulty according to the target voltage compared with the expected standard voltage after a preset time delay.
  • the detection points include: the positive interface of the fast charging positive relay, the negative interface of the fast charging positive relay, the positive interface of the fast charging negative relay, and the negative interface of the fast charging negative relay;
  • the startup module is used to include:
  • the first starter sub-module is used to detect the first target voltage between the positive interface of the fast charge positive relay and the negative interface of the fast charge negative relay, respectively, the negative interface of the fast charge positive relay and the positive electrode of the fast charge negative relay The second target voltage between the interfaces.
  • the detection points include: a positive interface of a fast charging positive relay, a negative interface of a fast charging positive relay, an interface of the negative high potential end of the power distribution box, and an interface of the negative low potential end of the power distribution box;
  • the startup module is used to include:
  • the second starter submodule is used to detect the first target voltage between the positive interface of the fast charging positive relay and the negative potential end interface of the power distribution box respectively, and the negative interface of the fast charging positive relay and the power distribution box The second target voltage between the negative high potential terminals.
  • the device further includes:
  • the second output module is used to close the circuit and output a detection report according to the judgment result if there is a failure.
  • the device described in this application has the following advantages:
  • the device described in this application detects and compares with the expected voltage by deploying a detection point around the fast charging relay to accurately and easily detect whether the fast charging relay is stuck properly, and provides a timely fault reminder.
  • the above-mentioned battery management device has the same advantages as the above-mentioned battery management method over the prior art, and will not be repeated here.
  • FIG. 1 is a flowchart of steps of a battery management method according to an embodiment of this application
  • FIG. 2 is an example circuit diagram of a battery management method according to an embodiment of the present application.
  • FIG. 3 is a flowchart of steps of another battery management method according to an embodiment of the present application.
  • FIG. 4 is an example circuit diagram of another battery management method according to an embodiment of the present application.
  • FIG. 5 is a structural block diagram of a battery management device according to an embodiment of this application.
  • FIG. 6 schematically shows a block diagram of a computing processing device for performing the method according to the present application.
  • FIG. 7 schematically shows a storage unit for holding or carrying program code implementing the method according to the present application.
  • the method may include:
  • Step 101 When it is detected that the main positive and negative contacts of the battery are closed, the target voltages of multiple detection points around the fast charge relay deployed in the power distribution box are detected according to a preset detection rule.
  • the fast charging relay in the power distribution box when the fast charging of the entire electric vehicle and the high voltage of the entire vehicle are powered on and off, if the fast charging relay in the power distribution box is stuck and fails, the parts will be damaged, or even neatly damaged. Will jeopardize the personal safety of the user. Therefore, when the charger in the electric vehicle detects that the main positive and negative contacts of the battery of the electric vehicle are closed, it starts a self-check to detect whether the fast charging relay is stuck properly. The embodiment of the present application judges whether the adhesion of the fast charging relay is normal by detecting the target voltage between the interfaces of multiple detection points arranged around the fast charging relay in the power distribution box.
  • a fast charging positive relay and/or a fast charging negative relay may be provided in the power distribution box, and one or two relays may be deployed in the power distribution box to detect the detection point according to the preset detection rules described in the embodiments of the present application
  • the target voltage between the interfaces determines whether the fast-charge relay adhesion is normal.
  • the fast charging positive relay negative electrode A1 and the fast charging positive relay positive electrode B1 are deployed in the power distribution box.
  • Fast charge negative relay positive C1, fast charge negative relay negative 1D the charger detects the voltage detection circuit between A1D1 and B1C1, and reports the detection report to the battery management system. 2
  • step 102 according to the comparison between the target voltage and the expected standard voltage, it is determined whether the fast charging relay is faulty.
  • Step 103 if there is no fault, output a test report according to the judgment result.
  • the accurate test result of the fast charge relay is determined, and if the test result is normal, the battery management system outputs a normal test result.
  • the method may include:
  • Step 301 When it is detected that the main positive and main negative contacts of the battery are closed, the target voltages of multiple detection points around the fast charging relay deployed in the power distribution box are detected according to a preset detection rule.
  • an interface of four detection points may be generally deployed in the power distribution box as a detection point for the voltage detection of the charger.
  • Step 301 can refer to step 101, and will not be repeated here.
  • the detection points include: a fast charging positive relay positive interface, a fast charging positive relay negative interface, a fast charging negative relay positive interface, fast Negative interface of the charging relay, step 301 may include:
  • Step 301a respectively detect the first target voltage between the positive interface of the fast charging positive relay and the negative interface of the fast charging negative relay, and the second between the negative interface of the fast charging positive relay and the positive interface of the fast charging negative relay Target voltage.
  • Step 3011 can refer to step 101, and will not be repeated here.
  • step 301 may include:
  • Step 301b respectively detect the first target voltage between the positive interface of the fast charging positive relay and the negative low potential terminal of the power distribution box, and the negative interface of the fast charging positive relay and the negative high potential terminal of the power distribution box Between the second target voltage.
  • a positive interface A2 of a fast charging positive relay, a negative interface B2 of a positive charging fast relay, an interface D2 of a negative low potential terminal of the power distribution box, and an interface C2 of a negative high potential terminal of the power distribution box are deployed in the detection circuit.
  • the charger detects the detection circuit between B2C2, and reports the detection result to the battery management system as the target voltage, and the target voltage is signal 2.
  • Step 302 Determine whether the fast charging relay is faulty according to the comparison between the target voltage and the expected standard voltage.
  • the charger in the electric vehicle reports the target voltage to the battery management system for fault diagnosis, so as to determine whether the fast charging relay has a fault according to the judgment result.
  • step 302 may include:
  • a certain preset time may be set, and the target may be set after the preset time The voltage is compared with the delay to determine, so as to avoid false alarms that may be caused by reporting the target voltage acquisition delay.
  • the fast charge relay can be closed within 20ms, and then the microcontroller on the secondary side of the voltage sampling circuit can collect the voltage.
  • This process takes 5ms and is sent to the DPS via the serial port within 25ms ( Digital Signal Processing), and then the charger reports the target voltage within 20ms-40ms, because the specific time is difficult to calculate, in order to ensure the accuracy of the battery management system diagnosis, it can be set after a preset time delay of 200ms Turn on the diagnosis of whether the fast charging relay is off.
  • step 302 may be implemented by the following example,
  • the battery management system receives the target voltage reported by the charger, and compares the target voltage with the expected standard voltage according to Table 2 below,
  • step 303 if there is no fault, a detection report is output according to the judgment result.
  • the battery management system diagnoses by comparing the target voltage with the expected standard voltage to obtain a judgment result, and if the judgment result is normal, the battery management system outputs the fast charge relay Test report of normal adhesion.
  • the method may further include:
  • step 304 if there is a fault, the circuit is closed and a test report is output according to the judgment result.
  • a detection report containing a specific failure type is output according to the judgment result, and the circuit is closed to prevent personal and property losses.
  • the target voltages of multiple detection points deployed around the fast charging relay are detected according to a preset detection rule; according to the target The voltage is compared with the expected standard voltage to determine whether the fast charging relay is faulty; if there is no fault, a test report is output according to the judgment result.
  • the method and device described in the present application detect and compare with the expected voltage by deploying a detection point around the fast charging relay to accurately and easily detect whether the fast charging relay is stuck properly and provide a timely fault reminder.
  • the device may include:
  • the startup module 501 is used to detect the target voltages of multiple detection points around the fast charging relay deployed in the power distribution box according to the preset detection rules when the battery main positive and main negative contacts are detected to be closed;
  • the judgment module 502 is used for judging whether the fast charging relay is faulty according to the comparison between the target voltage and the expected standard voltage;
  • the first output module 503 is used to output a detection report according to the judgment result if there is no fault.
  • the determining device 502 includes:
  • the delay judgment sub-module 5021 is configured to judge whether the fast charging relay is faulty according to the target voltage compared with the expected standard voltage after a preset time delay.
  • the detection points include: the positive interface of the fast charging positive relay, the negative interface of the fast charging positive relay, the positive interface of the fast charging negative relay, and the negative interface of the fast charging negative relay;
  • the startup module 501 is used to include:
  • the first starter sub-module 501a is configured to respectively detect a first target voltage between the positive interface of the fast charging positive relay and the negative interface of the fast charging negative relay, the negative interface of the fast charging positive relay and the fast charging negative relay The second target voltage between the positive terminals.
  • the detection points include: a positive interface of a fast charging positive relay, a negative interface of a fast charging positive relay, an interface of the negative high potential end of the power distribution box, and an interface of the negative low potential end of the power distribution box;
  • the startup module 501 is used to include:
  • the second starter sub-module 501b is configured to respectively detect the first target voltage between the positive interface of the fast charging positive relay and the negative potential terminal of the power distribution box, and the negative interface of the fast charging positive relay and the power distribution The second target voltage between the high potential terminals of the negative pole of the box.
  • the device further includes:
  • the second output module 504 is used to close the circuit and output a detection report according to the judgment result if there is a failure.
  • a battery management device described in this application detects the target voltage of multiple detection points deployed around a fast charging relay according to a preset detection rule when the battery main positive and main negative contacts are detected to be closed; according to the target The voltage is compared with the expected standard voltage to determine whether the fast charging relay is faulty; if there is no fault, a test report is output according to the judgment result.
  • the method and device described in the present application detect and compare with the expected voltage by deploying a detection point around the fast charging relay to accurately and easily detect whether the fast charging relay is stuck properly and provide a timely fault reminder.
  • the device embodiments described above are only schematics, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located One place, or it can be distributed to multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement without paying creative labor.
  • Each component embodiment of the present application may be implemented by hardware, or implemented by a software module running on one or more processors, or implemented by a combination thereof.
  • a microprocessor or a digital signal processor (DSP) may be used to implement some or all functions of some or all components in the computing processing device according to the embodiments of the present application.
  • the present application may also be implemented as a device or device program (eg, computer program and computer program product) for performing a part or all of the method described herein.
  • Such a program for implementing the present application may be stored on a computer-readable medium, or may have the form of one or more signals.
  • Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.
  • FIG. 6 shows a computing processing device that can implement the method according to the present application.
  • the computing processing device traditionally includes a processor 1010 and a computer program product or computer readable medium in the form of a memory 1020.
  • the memory 1020 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM.
  • the memory 1020 has a storage space 1030 for the program code 1031 for performing any method steps in the above method.
  • the storage space 1030 for program codes may include respective program codes 1031 for implementing various steps in the above method, respectively. These program codes can be read from or written into one or more computer program products.
  • Such computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks.
  • Such a computer program product is usually a portable or fixed storage unit as described with reference to FIG. 7.
  • the storage unit may have storage sections, storage spaces, and the like arranged similarly to the memory 1020 in the computing processing device of FIG. 6.
  • the program code may be compressed in an appropriate form, for example.
  • the storage unit includes computer readable code 1031', that is, code that can be read by, for example, a processor such as 1010, which, when executed by a computing processing device, causes the computing processing device to perform the method described above The various steps.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un procédé et un appareil de gestion de la batterie, et un programme informatique et un support lisible par ordinateur. Le procédé comprend les étapes consistant à : quand il est détecté que le contact principal positif et le contact principal négatif d'une batterie sont fermés, mesurer, en fonction d'une règle de détection prédéfinie, la tension cible de multiples points de détection déployés autour d'un relais de charge rapide ; comparer la tension cible avec une tension standard attendue pour déterminer si un défaut se produit dans le relais de charge rapide ; et s'il n'y a pas de défaut, délivrer en sortie un rapport de détection en fonction du résultat de la détermination. Selon le procédé et l'appareil, des points de détection sont déployés autour d'un relais de charge rapide et une comparaison avec une tension attendue est effectuée, ce qui permet de détecter précisément et facilement si le relais de charge rapide est coincé ou normal, et de fournir un rappel de défaut en temps opportun.
PCT/CN2019/129217 2018-12-29 2019-12-27 Procédé et appareil de gestion de la batterie WO2020135718A1 (fr)

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CN201811643384.3A CN110733348A (zh) 2018-12-29 2018-12-29 一种电池管理的方法和装置
CN201811643384.3 2018-12-29

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CN113884871A (zh) * 2021-09-28 2022-01-04 东风汽车有限公司东风日产乘用车公司 继电器状态检测方法、装置、设备及存储介质

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