CN108933469A - 电气系统 - Google Patents

电气系统 Download PDF

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CN108933469A
CN108933469A CN201810477389.7A CN201810477389A CN108933469A CN 108933469 A CN108933469 A CN 108933469A CN 201810477389 A CN201810477389 A CN 201810477389A CN 108933469 A CN108933469 A CN 108933469A
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converter
battery
electrical system
voltage
switch
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CN108933469B (zh
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拉比·本达尼
雷达·雪勒格胡姆
贝内迪克特·希尔维斯崔
布鲁诺·康大明
米蒙·阿斯克尔
玛索朗·戴尔罗
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Valeo eAutomotive France SAS
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Valeo Siemens eAutomotive France SAS
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • H02J7/022
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L55/00Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2210/00Converter types
    • B60L2210/10DC to DC converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2210/00Converter types
    • B60L2210/10DC to DC converters
    • B60L2210/12Buck converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2210/00Converter types
    • B60L2210/10DC to DC converters
    • B60L2210/14Boost converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2210/00Converter types
    • B60L2210/30AC to DC converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/547Voltage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60YINDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00Type of vehicle
    • B60Y2200/90Vehicles comprising electric prime movers
    • B60Y2200/91Electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60YINDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00Type of vehicle
    • B60Y2200/90Vehicles comprising electric prime movers
    • B60Y2200/92Hybrid vehicles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20Charging or discharging characterised by the power electronics converter
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/01Resonant DC/DC converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33571Half-bridge at primary side of an isolation transformer
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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  • Transportation (AREA)
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  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Dc-Dc Converters (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

本发明涉及一种电气系统,被设计成安装在电动车辆或混动车辆上的电气系统。电气系统包括:交流‑直流转换器,包括整流器及直流‑直流转换器,隔离直流‑直流转换器,连接到高压电池。电气系统被配置成在第一运行模式中连接到外部交流电网以对高压电池进行充电。此外,直流‑直流转换器的第一接口端子连接到低压电池,其中电气系统被配置成在第二运行模式中,当电气系统从外部交流电网断开时,直流‑直流转换器从高压电池供应初始电压以对低压电池供电。

Description

电气系统
技术领域
一般来说,本发明涉及机动车辆领域,尤其是电动车辆或混动车辆,并且更具体来说涉及用于此类车辆的低压电池充电及高压电池充电的管理系统。
更具体来说,在具有对车辆设备供电的低压电池及参与车辆的推进的高压电池的电动车辆或混动车辆的背景下,通常的做法是实施车载充电器系统,通常由其缩写OBC阐述,这是本领域的技术人员熟知的特征。在此背景下,本发明涉及一种形成改进的车载充电器的电气系统。
背景技术
众所周知,电动车辆或混动车辆包括由高压电池通过车载高压电气系统供电的电驱动系统以及由低压电池通过车载低压电气系统供电的多个辅助电气设备。高压电池对电驱动系统供电,从而提供用于车辆的推进。低压电池对例如车载计算机、车窗升降马达、多媒体系统等辅助电气设备供电。高压电池通常提供100V到900V,优先100V到500V,而低压电池通常输送12V、24V或48V。所述高压电池及低压电池必须是可充电的。
高压电池的电力充电通过将电池通过车辆的高压电气系统连接到外部电网(例如家用交流电网)来实现。
为此目的,高压电池因此被设计成通过车载充电器系统(on-board chargersystem)或OBC连接到家用交流电网并由家用交流电网充电,所述车载充电器系统或OBC主要具有包括整流器的交流-直流转换器及带有功率因数校正(Power Factor Correction)(或PFC)的直流-直流转换器、以及优先电隔离直流-直流转换器。
在此类型的OBC系统中,如图1所示,来自家用交流电网G1的交流电流初始在交流-直流转换器中被处理,从而所述交流电流在供应到PFC转换器(PFC1)之前由整流器RD转换成直流电流。
PFC转换器在其功率因数校正功能方面的目的是消除影响吸收电流的电网的失真,以防止产生谐波电流,因为这些谐波电流对于车载电气系统,且尤其是对于高压电气系统是有害的。PFC转换器用于确保输入电流及电压同相。
同样众所周知的是高压电池可用于对低压电池进行充电。在这种情况下,高压电池通过预调节器及辅助直流-直流转换器连接到低压电池,其中所述辅助直流-直流转换器是电隔离的。由辅助直流-直流转换器供应的低电压因此对车辆的低压电气系统供电。
当前,存在高压电池及低压电池的独立充电功能,且每一功能需要实施分别专用的直流-直流转换器及预调节器。
为了提高OBC系统的紧凑性并限制所需组件的数量,一个想法是结合车载充电器系统的功能。
根据现有技术,众所周知的是将分别专用于对高压电池及低压电池进行充电的OBC系统的组件布置在相同的壳体中。同样众所周知的是将这两个电池充电系统布置成使它们共享相同的冷却系统、相同的滤波器、乃至相同的命令电子控制器。
文献WO 2015/192133阐述用于电动车辆或混动车辆的OBC系统的实例。文献WO2015/192133中所述的OBC系统是电隔离的,且其包括的PFC转换器被配置成通过谐振元件与磁性组件的组合来使所供应的功率密度最大化。
此文献代表了现有技术,且所述OBC系统具有上述缺点,尤其是在其使用的空间方面。
为了减轻这些缺点,本发明提出使用交流-直流转换器的PFC转换器,其中在高压电池的充电期间及在低压电池的充电期间,即在高压电池被充电的任何时间,将来自家用交流电网的交流电流转换成用于高压电气系统的直流电压。
因此,根据本发明,PFC转换器用作标准PFC转换器,其鉴于在高压电池充电时对高压电池进行充电且在高压电池不充电时为对低压电池供电的辅助直流-直流转换器提供预调节功能而调节来自经整流外部交流电网的电压的输出电压。
发明内容
具体来说,本发明涉及一种电气系统,被设计成安装在电动车辆或混动车辆上的电气系统,其中所述电气系统包括:
交流-直流转换器,包括整流器及直流-直流转换器;
隔离直流-直流转换器,连接到高压电池;及
其中所述电气系统被配置成在第一运行模式中连接到外部交流电网以对所述高压电池进行充电,其中所述整流器从自所述外部交流电网接收的交流电流向所述直流-直流转换器供应经整流电压,且其中所述直流-直流转换器通过所述隔离直流-直流转换器连接到所述高压电池。
所述电气系统中:
所述直流-直流转换器的多个第一接口端子被设计成连接到低压电池,且
所述电气系统被配置成在第二运行模式中,当所述电气系统从所述外部交流电网断开时,所述直流-直流转换器从所述高压电池供应初始电压以对所述低压电池供电。
利用根据本发明的电气系统,由于直流-直流转换器实现两个功能,因此OBC系统具有改进的紧凑性,从而不再需要具有专用于对低压电池进行充电的预调节器。
此外,在第二运行模式中,所述直流-直流转换器具有能够输送初始直流电压以对所述低压电池进行充电而无电流不连续性的优点。
在一个实施例中,所述电气系统还包括:
辅助直流-直流转换器,连接到所述低压电池,且具有一个输入连接到所述直流-直流转换器的所述多个第一接口端子,且
其中所述电气系统被配置成在第二运行模式中,所述直流-直流转换器从所述高压电池为所述辅助直流-直流转换器提供所述初始电压以对所述低压电池供电。
有利地,所述直流-直流转换器及所述辅助直流-直流转换器分别包括多个开关,所述多个开关被配置成控制分别由所述直流-直流转换器及由所述辅助直流-直流转换器供应的电力。因此,在所述第二运行模式中,所述辅助直流-直流转换器的所述开关以恒定的工作比工作,且所述直流-直流转换器的所述开关以可变的工作比工作,以控制由所述辅助直流-直流转换器供应到所述低压电池的电压。
在一个实施例中,所述电气系统包括连接在所述高压电池的高输入端子与所述直流-直流转换器的高的第二接口端子之间的第一开关、以及连接在所述低压电池的低输入端子与所述直流-直流转换器的低的第二接口端子之间的第二开关,且所述电气系统被配置成在所述第二运行模式中,所述第一开关及所述第二开关闭合,从而确保所述高压电池的端子处的第三电压施加在所述直流-直流转换器的所述多个第二接口端子上。
有利地,所述直流-直流转换器的所述多个第一接口端子对应于连接在所述隔离直流-直流转换器的输入处的多个端子,且所述直流-直流转换器的所述多个第二接口端子对应于连接在所述整流器的输出处的多个端子。
有利地,在所述第一运行模式中,所述辅助直流-直流转换器还被配置成将所述直流-直流转换器从所述外部交流电网供应的所述电压转换成能够用于对所述低压电池供电的电压。
有利地,所述直流-直流转换器的所述多个第一接口端子对应于连接在所述整流器的输出处的多个端子,且所述直流-直流转换器的所述多个第二接口端子对应于连接在所述隔离直流-直流转换器的输入处的多个端子。
有利地,在所述第一运行模式中,所述第一开关及所述第二开关断开,以启用所述直流-直流转换器来通过所述隔离直流-直流转换器向所述高压电池提供电压。
在一个实施例中,所述第一开关及所述第二开关是机电式继电器或半导体开关。
在所选实施例中,所述直流-直流转换器是升压型的或是降压-升压型的。
在一个实施例中,所述电气系统包括连接到所述整流器的输入的滤波构件,所述滤波构件用于对由所述外部交流电网供应的电压进行滤波并将经滤波电压供应到所述整流器。
在一个实施例中,所述直流-直流转换器的所述开关被配置成在第一运行模式中,所述直流-直流转换器基于所述高压电池的电压需求来输送初始电压。
在一个实施例中,所述直流-直流转换器的所述开关被配置成在第二运行模式中,所述直流-直流转换器基于所述低压电池的电压需求来输送初始电压。
在一个实施例中,所述电气系统包括用于确定所述低压电池的电压需求的构件。
在一个实施例中,所述电气系统还包括用于确定所述高压电池的电压需求的构件。
附图说明
参照附图阅读作为实例提供的下述说明,会更好地理解本发明,所述附图表示:
图1是根据现有技术的OBC系统的功能框图。
图2是根据本发明的OBC系统的功能框图。
图3是根据本发明的OBC系统的第一实施例实例的简化电子图。
图4是根据本发明的OBC系统的第二实施例实例的简化电子图。
[符号的说明]
CB、Co、Cr/2:电容器
DB、Do1、Do2、D1、D2、D3、D4:二极管
DC、DCDC2、DCDC20:直流-直流转换器
DC11、DC21:电隔离直流-直流转换器
DC12:专用及电隔离辅助直流-直流转换器
DC22:电隔离辅助直流-直流转换器/辅助直流-直流转换器
DCDC1、DCDC10:辅助直流-直流转换器
F:滤波构件
G:外部交流电网
G1、G2:外部交流电网/家用交流电网
HV、HV1、HV2:高压电池
LB、Lm、Lr:电感
LLC:隔离直流-直流转换器
LV、LV1、LV2:低压电池
OBC:车载充电器系统
PFC1:功率因数校正转换器
PR1:预调节器
Q:双向开关
Q1、Q2、QB:开关
R:开关/第一开关
R1、R10:继电器/开关/第一开关
R2、R20:继电器/开关/第二开关
RD:整流器
RT:谐振电路
V1:电压/初始电压/第一高电压/第一经调节可变电压
V2:初始电压/输入电压
V3:电压/第二低电压
V4:电压/第三高电压
Vin:正弦电压/电压
具体实施方式
值得一提的是,本发明在下文中根据不同的实施例来进行阐述且不限于此。本发明可采用本领域的技术人员已知的也包括在本发明中的各种形式来实施。
图1示出根据现有技术的OBC系统的功能框图。此OBC系统对通常用于电动车辆或混动车辆的推进的高压电池HV1及用于对所述车辆的电气设备供电的低压电池LV1供电。
参照图1,为了对车辆的用于对高压电池HV1进行充电的高压电气系统供电,所表示的OBC系统具有交流-直流转换器,所述交流-直流转换器包括由外部交流电网G1(例如家用交流电网)供电的整流器RD,其中整流器RD向用作PFC转换器(图1中的PFC1)的电压转换器输送经整流电压,以在通过电隔离直流-直流转换器(图1中的DC11)对高压电池HV1供电之前调节所述电压。
仍然参照图1,为了对车辆的用于对低压电池LV1进行充电的低压电气系统供电,所表示的OBC系统具有连接到高压电池HV1的预调节器PR1,其中由预调节器PR1从HV1电池的端子处的电压输送的电压用于通过专用及电隔离辅助直流-直流转换器(图1中的DC12)来对低压电池LV1供电。
参照图2,为了改进此设计的紧凑性,本发明提出用作PFC转换器的直流电压转换器对于其中高压电池HV2进行充电的运行模式及对于其中高压电池HV2不进行充电且其中高压电池HV2能够提供电压以对低压电池LV2供电的运行模式的共享使用。
当高压电池HV2充电时,直流电压转换器在交流-直流转换器内用作标准PFC转换器,从而在来自整流器RD的电压通过电隔离直流-直流转换器DC21对高压电池HV2供电之前调节所述电压。
当高压电池HV2不充电时,其有助于对低压电池LV2进行充电。在此第二运行模式中,直流电压转换器不再用作PFC转换器。直流转换器因此用作所述低压电池LV2的预调节器,其中高压电池HV2不充电且OBC系统不连接到外部交流电网G2。在此运行模式中,高压电池HV2的端子处的电压通过一组开关R连接到直流转换器的输入端子。所述直流转换器将经调节电压输送到低压供应系统的电隔离辅助直流-直流转换器DC22,以对低压电池LV2进行充电。
用作预调节器,直流转换器通过将由直流转换器供应的高电压转换为由低压供应系统使用的较低电压的辅助直流-直流转换器将来自高压电池HV2的高电压转换为由低压供应系统使用的经调节电压,即转换成用于对低压电池LV2进行充电的电压。
利用根据本发明的OBC系统的设计,不再需要专用于对低压电池LV2进行充电的预调节器,因为在高压电池不充电时,直流转换器实现此功能。
因此,在其中OBC系统连接到外部交流电网G2以对高压电池HV2进行充电的运行模式中,直流转换器被控制成输送被确定为优化高压电池HV2的充电的高电压。
在其中OBC系统(通常在高压电池HV2不充电时从外部交流电网G2断开)对低压电池LV2进行充电的运行模式中,直流转换器被控制成向连接到低压电池LV2的辅助直流-直流转换器DC22输送电压。直流转换器的输入接收在高压电池HV2的端子处输送的电压,并且基于针对低压电池LV2确定的电压需求来调节所述电压。
应该指出的是,根据两个实施例,直流转换器是升压型的或是降压-升压型的。“升压”转换器是形成使电压升高的开关式电源的一部分的转换器,而“降压-升压”转换器是可使电压升高或降低的开关式电源的一部分。
图3示出根据本发明的OBC系统的实施例实例的简化电气图。众所周知,OBC系统被表示成一连串的级。首先,所述OBC系统包括由二极管D1、D2、D3、D4形成的整流器RD。然后,直流-直流转换器DCDC2在其输出端子之间包括电感LB、开关QB、二极管DB及电容器CB。隔离直流-直流转换器LLC具有两个开关Q1、Q2、在其输出端子之间包括电感Lr、两个电容器Cr/2、电感Lm、两个二极管Do1及Do2以及电容器Co的谐振电路RT。根据本发明的OBC系统被配置成对高压电池HV及低压电池LV进行充电。
低压电池LV通过辅助直流-直流转换器DCDC1充电,所述辅助直流-直流转换器DCDC1优先包括用于在电压可施加到低压电池LV的端子之前修改所述电压的开关(图中未示出)。优先地,辅助直流-直流转换器DCDC1是电隔离的。
从结构的角度来看,在图3所示的实施例中,两个开关R1及R2,且更具体来说两个继电器被添加且连接在高压电池HV的相应端子与转换器DCDC2的输入之间。
利用这些开关R1及R2,高压电池HV的端子处的电压被施加在位于整流器RD与转换器DCDC2之间的接口端子处,其中当不实施高压电池HV的充电功能时,所述开关闭合。
在图3中,如同在图4中一样,V2阐述到达位于整流器RD与转换器DCDC2之间的接口端子的输入电压,V1是位于转换器DCDC2与隔离直流-直流转换器LLC之间的接口端子处的第一高电压,V3是位于低压电池的端子处的第二低电压且V4是位于高压电池HV的端子处的第三高电压。
因此,参照图3,在第一运行模式中,当OBC系统连接到输送正弦电压Vin的外部交流电网G时,高压电池HV的充电是现用的。由外部交流电网G供应的电压Vin通过滤波构件F被滤波并且由整流器RD整流以在所述整流器与转换器DCDC2之间输送输入电压V2。
在第一运行模式中,转换器DCDC2用作PFC转换器。在转换器DCDC2的输出处,第一高电压V1根据高压电池HV的端子处所需的第三高电压V4进行调节且为恒定的,其值介于100V与900V的范围内且通常为约500V的值。第一高电压V1然后由隔离直流-直流转换器LLC修改以对高压电池HV充电。在此特例中,被实施成修改第一高电压V1以用电压V4来对高压电池HV进行充电的直流-直流转换器由包括谐振电路RT的LLC谐振半桥(half-bridge)组成。本说明作为实例提供,且隔离直流-直流转换器LLC可以很好地遵循不同的拓扑结构。
在此第一运行模式中,继电器R1及R2断开。连接到低压电池LV的辅助直流-直流转换器DCDC1的输入对应于由DCDC2转换器供应的第一恒定高电压V1。在另一种型式中,根据辅助直流-直流转换器DCDC1所施加的转换因数,所述辅助直流-直流转换器DCDC1将第一高电压V1转换成大约为12V、24V或通常为48V的第二低电压V3。
在此型式中,因低压电池LV不具有专用调节器,因此低压电池LV是以“降级(downgraded)”模式充电。转换器DCDC2被控制成基于所述高压电池HV的电压需求调节其输送的第一高电压V1,且供应到低压电池LV的第二低电压V3未进行优化修改。在其中高压电池LV充电的此型式中,对低压电池LV供电的此“降级”模式被视为可接受的。
如上所述,在第一运行模式中,“降级”模式仍然是可接受的,因为当高压电池HV充电且车辆连接到外部交流电网G时,连接到低压电气系统(例如多媒体系统、窗户升降马达等)的设备的电力需求实际上减少到最低限度。
在第二运行模式中,由于OBC系统从外部交流电网G断开,因此高压电池HV的充电是非现用的。
在此情况下,继电器R1及R2闭合,且位于整流器RD与转换器DCDC2之间的接口端子连接到高压电池HV的端子,使得V2=V4。
在一个实施例中,DCDC2转换器可根据第二运行模式用作预调节器,其目的是输送适应于在低压电池LV的端子处确定的电压需求的第一经调节可变电压V1。在此情况下,辅助直流-直流转换器包括开关(图中未示出)。所述开关(与转换器DCDC2的一个(多个)开关QB一起工作)在此实施例中被配置成控制分别输送到每一所述转换器的电力。
在一个实施例中,包括计算构件以确定低压电池LV的所述电压需求。
实际上,辅助直流-直流转换器的输入对应于由DCDC2转换器输送的第一高电压V1。辅助直流-直流转换器基于低压电池LV的电压需求修改所述第一高电压V1,以输送所需第二低电压V3。辅助直流-直流转换器DCDC1因此在低压电池LV的端子处输送由通过转换因数确定的第二低电压V3。
在作为实例提供而不限于此的第二运行模式的另一种型式中,辅助直流-直流转换器DCDC1的开关以恒定的工作比工作,且转换器DCDC2的开关QB以可变的工作比工作,以控制由辅助直流-直流转换器DCDC1供应到低压电池LV的电压。辅助直流-直流转换器DCDC1因此可具有介于输入电压(即,从直流-直流辅助转换器输出的第一电压V1)与第二输送低电压V3之间的恒定转换因数,以按照工作比以其容量的50%运行,并实现极低的电压输出。为了使第二低电压V3适应低压电池LV的需求,辅助直流-直流转换器DCDC1可作为替代方案具有可变的转换因数,但此配置会导致电压损失的显著增加。
图4示出根据本发明的OBC系统的第二实施例实例的简化电气图。
与在图3中给出的实例相比,辅助直流-直流转换器DCDC10及通常由继电器组成的开关R10、R20反向连接。换句话说,在图4中,辅助直流-直流转换器DCDC10连接到在图3中分别与继电器R1及R2连接的连接端子,而相反地,在图4中,继电器R10及R20连接到在图3中与辅助直流-直流转换器DCDC1连接的连接端子。
因此,辅助直流-直流转换器DCDC10连接到低压电池LV的相应端子且连接到直流-直流转换器DCDC20的输入。
继电器R10、R20连接到高压电池HV的相应端子且连接到DCDC20转换器的与隔离直流-直流转换器LLC的输入对应的输出。
此外,图3中的二极管DB在图4中被替换为双向开关Q,所述双向开关Q甚至可以是与开关QB相同类型的。
当OBC系统连接到外部电网G且实施高压电池HV的充电功能时,输入电压V2被输送到DCDC20转换器且对应于来自外部电网的经整流电压Vin。高压电池HV通过用作PFC转换器的转换器DCDC20及隔离直流-直流转换器LLC的充电以及低压电池LV通过辅助直流-直流转换器DCDC10以“降级”模式的潜在充电都是直接有效的。
当不实施高压电池HV的充电功能时,在R10及R20开关被闭合情况下,高压电池HV的端子处的第三高压电V4被施加到位于转换器DCDC20与隔离直流-直流转换器LLC之间的接口端子,使得V1=V4。此外,双向开关Q通过与开关QB切换来运行,以使电流能够从位于转换器DCDC20与隔离直流-直流转换器LLC之间的接口端子行进到位于整流器RD与转换器DCDC20之间的接口端子。在此情况下,转换器DCDC20以降压模式运行。
高压电池HV的端子处的第三高电压V4因此通过转换器DCDC20被路由传送到位于整流器RD与转换器DCDC20之间的接口端子,且对应于输入电压V2,其中对低压电池LV供电的辅助直流-直流转换器DCDC10连接到相同的端子。在一个实施例中,转换器DCDC20降低由高压电池HV输送的电压,使得V2<V4。在一个实施例中,转换器DCDC20还用作向供应第二低电压V3以对低压电池LV供电的转换器DCDC10输送稳定电压的预调节器。换句话说,转换器DCDC20以可变的工作比运行,而辅助直流-直流转换器DCDC10以例如50%的恒定的工作比工作。
因此,如同在图3中的实例中一样,低压电池LV是利用由高压电池HV供应的电压充电。
为了实施本发明,应该指出的是,直流转换器可以是“升压”型的或是“降压-升压”型的,直流转换器可以是单电池转换器或多电池转换器,直流转换器可以是交错的或不交错的,且直流转换器可以是可逆的或不可逆的。在第二实施例的情况下,转换器DCDC20实际上是“降压-升压”型的。具体来说,直流转换器不是隔离的。
具体来说,隔离转换器可不同于上述转换器。举例来说,在隔离转换器中,初级电路和/或次级电路可各自包括几个线圈。具体来说,隔离转换器可类似于专利申请PCT/EP2016/074641中所述的那些转换器。

Claims (10)

1.一种电气系统,被设计成安装在电动车辆或混动车辆上,其特征在于,所述电气系统包括:
交流-直流转换器,包括整流器及直流-直流转换器;
隔离直流-直流转换器,连接到高压电池;及
其中所述电气系统被配置成在第一运行模式中连接到外部交流电网以对所述高压电池进行充电,且其中所述整流器从自所述外部交流电网接收的交流电流向所述直流-直流转换器供应经整流电压,且其中所述直流-直流转换器通过所述隔离直流-直流转换器连接到所述高压电池,
所述电气系统中:
所述直流-直流转换器的多个第一接口端子被设计成连接到低压电池,且
所述电气系统被配置成在第二运行模式中,当所述电气系统从所述外部交流电网断开时,所述直流-直流转换器所述高压电池供应初始电压以对所述低压电池供电。
2.根据权利要求1所述的电气系统,其特征在于,包括:
辅助直流-直流转换器,连接到所述低压电池,且具有一个输入,连接到所述直流-直流转换器的所述多个第一接口端子,以及
其中所述电气系统被配置成在所述第二运行模式中,所述直流-直流转换器从所述高压电池为所述辅助直流-直流转换器提供所述初始电压以对所述低压电池供电。
3.根据权利要求2所述的电气系统,其特征在于,所述直流-直流转换器及所述辅助直流-直流转换器分别包括多个开关,所述所述开关被配置成对分别由所述直流-直流转换器及由所述辅助直流-直流转换器供应的电力进行控制,
其中在所述第二运行模式中,所述辅助直流-直流转换器的所述所述开关以恒定的工作比工作,且所述直流-直流转换器的所述所述开关以可变的工作比工作,以控制由所述辅助直流-直流转换器供应到所述低压电池的电压。
4.根据权利要求1或2所述的电气系统,其特征在于,所述电气系统包括连接在所述高压电池的高输入端子与所述直流-直流转换器的高的第二接口端子之间的第一开关、以及连接在所述低压电池的低输入端子与所述直流-直流转换器的低的第二接口端子之间的第二开关,且所述电气系统被配置成在所述第二运行模式中,所述第一开关及所述第二开关闭合,从而确保所述高压电池的端子处的第三电压施加在所述直流-直流转换器的所述多个第二接口端子上。
5.根据权利要求4所述的电气系统,其特征在于,所述直流-直流转换器的所述多个第一接口端子对应于连接在所述隔离直流-直流转换器的输入处的多个端子,且所述直流-直流转换器的所述多个第二接口端子对应于连接在所述整流器的输出处的多个端子。
6.根据权利要求5所述的电气系统,其特征在于,根据所述第一运行模式,所述辅助直流-直流转换器还被配置成将所述直流-直流转换器从所述外部交流电网供应的所述电压转换成能够用于对所述低压电池供电的电压。
7.根据权利要求4所述的电气系统,其特征在于,所述直流-直流转换器的所述多个第一接口端子对应于连接在所述整流器的输出处的多个端子,且所述直流-直流转换器的所述多个第二接口端子对应于连接在所述隔离直流-直流转换器的输入处的多个端子。
8.根据权利要求4到7中任一项所述的电气系统,其特征在于,根据所述第一运行模式,所述第一开关及所述第二开关断开,以启用所述直流-直流转换器来通过所述隔离直流-直流转换器向所述高压电池提供电压。
9.根据权利要求5所述的电气系统,其特征在于,所述第一开关及所述第二开关是机电式继电器或半导体开关。
10.根据权利要求1所述的电气系统,其特征在于,所述直流-直流转换器是升压型的或是降压-升压型的。
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