CN112550070A - 一种电动车低压蓄电池自动充电方法 - Google Patents

一种电动车低压蓄电池自动充电方法 Download PDF

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CN112550070A
CN112550070A CN202011370068.0A CN202011370068A CN112550070A CN 112550070 A CN112550070 A CN 112550070A CN 202011370068 A CN202011370068 A CN 202011370068A CN 112550070 A CN112550070 A CN 112550070A
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杜江涛
黄浩
陈宣宣
余彬
王曼曼
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Dongfeng Motor Corp
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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
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote or cooperative charging

Abstract

本发明提出一种电动车低压蓄电池自动充电方法，不通过蓄电池传感器而是通过车辆下电存放天数开环定性判定开始充电条件，不通过蓄电池传感器而是通过蓄电池充电时DCDC输出电流和充电时间开环定性判断停止充电条件，蓄电池充电管理程序放在云端，可以方便的进行设置参数、补充参数的调整，本发明不使用蓄电池传感器实现蓄电池自动充电功能，不局限于硬件，降低了车辆成本。

Description

一种电动车低压蓄电池自动充电方法
技术领域
本发明属于电动汽车低压蓄电池充电的技术领域，尤其涉及一种电动车低压蓄电池自动充电方法。
背景技术
电动车因DCDC(Direct Current to Direct Current)可以实现与电机(对应燃油车发动机)实现功能解耦，一些车型都有低压蓄电池电量低自动充电功能。为了实现开始充电和停止充电条件的判断，车辆通过安装了蓄电池传感器检测低压蓄电池SOC(State ofCharge)电池荷电状态来实现。用户只需保证所述高压电池有电即可，无需关注所述低压电池是否有电，低压电池的充电过程无需用户干预，方便了用户操作。
现有的方案都必须装备蓄电池传感器，而一些低成本车型都面临较大的成本压力未能安装此传感器，无法定量的进行判断开始充电、停止充电。而蓄电池自动充电功能对于用户感受、蓄电池容量降低有非常大的益处。因此，提供了一种不使用蓄电池传感器实现蓄电池自动充电的功能的技术，很有必要。
发明内容
本发明所要解决的技术问题在于针对上述存在的问题，提供一种电动车低压蓄电池自动充电方法，不使用蓄电池传感器的方案实现低压蓄电池的自动充电功能。
本发明解决上述技术问题所采用的技术方案是：一种电动车低压蓄电池自动充电方法，其特征在于，包括如下步骤：
S1)车联网云端服务器定期唤醒车载T-Box；
S2)车载T-Box唤醒电池管理系统获得高压电池荷电状态值上传；
S3)当高压电池荷电状态值小于一定阈值，短信提醒用户高压充电；
S4)当高压电池荷电状态值大于一定阈值，车联网云端服务器计算停放天数计时；
S5)车辆停放时间超过一定天数唤醒车载T-Box；
S6)车载T-Box唤醒高低压直流转换装置、电池管理系统对蓄电池进行充电；
S7)高低压直流转换装置输出电流小于一定值或充电时间大于一定值时停止充电；
S8)高低压直流转换装置、电池管理系统下高低压电，整车休眠。
按上述方案，步骤S5中所述一定天数根据设计实测数据加上一定阈值进行设定，并根据电池容量衰减状态判断使用不同的公式来提高计算的精度；电池容量衰减状态判断通过上次充电量与放电量的比率表示：
Figure BDA0002805858560000011
当
Figure BDA0002805858560000021
时，存放天数T为：
T＝(C20×(SOC起始-SOC终))/(I暗电流×24)
当
Figure BDA0002805858560000022
时，存放天数T为：
T＝(Σ(I充电-I充电消耗)*3600)/(I暗电流×24)
其中，I充电为高低压直流转换装置充电电流；I充电消耗为OOF档下高低压直流
转换装置充电时相关用电器消耗电流；I暗电流为整车暗电流；SOC起始为车辆下电时设定的电池荷电状态值；SOC终为设定充电截止电池荷电状态值；C20为蓄电池的20h率额定容量。
按上述方案，步骤S7中所述电流值根据设计实测值乘以一定系数进行设定，所述实测值为工况为OFF档下，仅高低压直流转换装置充电工作时所需用电器功率的累加。
按上述方案，步骤S7中所述充电时间为高低压直流转换装置充满蓄电池的时间乘以一定系数进行设定。
按上述方案，步骤S3中所述一定阈值为电池荷电满值的10％～20％。
按上述方案，步骤S4中所述一定阈值为电池荷电满值的30％。
本发明的有益效果是：提供一种电动车低压蓄电池自动充电方法，提出不使用蓄电池传感器而是通过车辆下电存放天数开环定性判定开始充电条件，不通过蓄电池传感器而是通过蓄电池充电时DCDC输出电流和充电时间开环定性判断停止充电条件，实现蓄电池自动充电功能，不局限于硬件，降低了车辆成本；蓄电池充电管理程序放在云端，可以方便的进行设置参数、补充参数的调整。
附图说明
图1为本发明一个实施例的流程图。
具体实施方式
为更好地理解本发明，下面结合附图和实施例对本发明作进一步的描述。
如图1所示，一种电动车低压蓄电池自动充电方法，包括如下内容：
S1)车联网云端服务器定期唤醒车载T-Box；
S2)车载T-Box唤醒电池管理系统BMS获得高压电池荷电SOC状态值上传；
S3)当高压电池荷电状态值小于一定阈值，短信提醒用户高压充电；
S4)当高压电池荷电状态值大于一定阈值，车联网云端服务器计算停放天数计时；
S5)车辆停放时间超过一定天数唤醒车载T-Box；
S6)车载T-Box唤醒高低压直流转换装置DCDC、电池管理系统对蓄电池进行充电；
S7)高低压直流转换装置输出电流小于一定值或充电时间大于一定值时停止充电；
S8)高低压直流转换装置、电池管理系统下高低压电，整车休眠。
步骤S5中一定天数根据设计实测数据加上一定阈值进行设定，并根据电池容量衰减状态判断使用不同的公式来提高计算的精度；电池容量衰减状态判断通过上次充电量与放电量的比率表示：
Figure BDA0002805858560000031
当
Figure BDA0002805858560000032
时，存放天数T为：
T＝(C20×(SOC起始-SOC终))/(I暗电流×24)
当
Figure BDA0002805858560000033
时，存放天数T为：
T＝(Σ(I充电-I充电消耗)*3600)/(I暗电流×24)
其中，I充电为高低压直流转换装置充电电流；I充电消耗为OOF档下高低压直流
转换装置充电时相关用电器消耗电流；I暗电流为整车暗电流；SOC起始为车辆下电时设定的电池荷电状态值；SOC终为设定充电截止电池荷电状态值；C20为蓄电池的20h率额定容量。
步骤S7中电流值根据设计实测值乘以一定系数进行设定，实测值为工况为OFF档下，仅高低压直流转换装置充电工作时所需用电器功率的累加。
步骤S7中所述充电时间为高低压直流转换装置充满蓄电池的时间乘以一定系数进行设定。
步骤S3中所述一定阈值为电池荷电SOC满值的10％～20％。
步骤S4中所述一定阈值为电池荷电SOC满值的30％。
对于一些低成本低配车型来说，成本要求严格，未安装蓄电池传感器，无法定量的进行判断开始充电、停止充电。而蓄电池自动充电功能对于用户感受、蓄电池容量降低有非常大的益处。
本发明技术方案针对此种情况，提出不使用蓄电池传感器实现蓄电池自动充电功能，不局限于硬件，降低了车辆成本。

Claims (6)

1.一种电动车低压蓄电池自动充电方法，其特征在于，包括如下步骤：
S1)车联网云端服务器定期唤醒车载T-Box；
S2)车载T-Box唤醒电池管理系统获得高压电池荷电状态值上传；
S3)当高压电池荷电状态值小于一定阈值，短信提醒用户高压充电；
S4)当高压电池荷电状态值大于一定阈值，车联网云端服务器计算停放天数计时；
S5)车辆停放时间超过一定天数唤醒车载T-Box；
S6)车载T-Box唤醒高低压直流转换装置、电池管理系统对蓄电池进行充电；
S7)高低压直流转换装置输出电流小于一定值或充电时间大于一定值时停止充电；
S8)高低压直流转换装置、电池管理系统下高低压电，整车休眠。
2.根据权利要求1所述的一种电动车低压蓄电池自动充电方法，其特征在于，步骤S5中所述一定天数根据设计实测数据加上一定阈值进行设定，并根据电池容量衰减状态判断使用不同的公式来提高计算的精度；电池容量衰减状态判断通过上次充电量与放电量的比率表示：
Figure FDA0002805858550000011
当
Figure FDA0002805858550000012
时，存放天数T为：
T＝(C20×(SOC起始-SOC终))/(I暗电流×24)
当
Figure FDA0002805858550000013
时，存放天数T为：
T＝(Σ(I充电-I充电消耗)*3600)/(I暗电流×24)
其中，I充电为高低压直流转换装置充电电流；I充电消耗为OOF档下高低压直流转换装置充电时相关用电器消耗电流；I暗电流为整车暗电流；SOC起始为车辆下电时设定的电池荷电状态值；SOC终为设定充电截止电池荷电状态值；C20为蓄电池的20h率额定容量。
3.根据权利要求2所述的一种电动车低压蓄电池自动充电方法，其特征在于，步骤S7中所述电流值根据设计实测值乘以一定系数进行设定，所述实测值为工况为OFF档下，仅高低压直流转换装置充电工作时所需用电器功率的累加。
4.根据权利要求2或3所述的一种电动车低压蓄电池自动充电方法，其特征在于，步骤S7中所述充电时间为高低压直流转换装置充满蓄电池的时间乘以一定系数进行设定。
5.根据权利要求1所述的一种电动车低压蓄电池自动充电方法，其特征在于，步骤S3中所述一定阈值为电池荷电满值的10％～20％。
6.根据权利要求1所述的一种电动车低压蓄电池自动充电方法，其特征在于，步骤S4中所述一定阈值为电池荷电满值的30％。
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