WO2010022643A1 - 混合动力车动力电池的均衡充电方法及装置 - Google Patents

混合动力车动力电池的均衡充电方法及装置 Download PDF

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Publication number
WO2010022643A1
WO2010022643A1 PCT/CN2009/073477 CN2009073477W WO2010022643A1 WO 2010022643 A1 WO2010022643 A1 WO 2010022643A1 CN 2009073477 W CN2009073477 W CN 2009073477W WO 2010022643 A1 WO2010022643 A1 WO 2010022643A1
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Prior art keywords
charging
power battery
battery
charger
hybrid vehicle
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PCT/CN2009/073477
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English (en)
French (fr)
Inventor
马建新
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奇瑞汽车股份有限公司
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Publication of WO2010022643A1 publication Critical patent/WO2010022643A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • 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]
    • B60L58/15—Preventing overcharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using 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
    • Y02T10/62—Hybrid 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
    • 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

Definitions

  • the invention relates to a method and a device for equalizing charging of a hybrid vehicle power battery. Background technique
  • hybrid vehicles have added key components such as high-voltage power battery systems, motor systems, and vehicle controllers.
  • the high-voltage power battery system is composed of a battery management system, a high-voltage safety management system, a thermal management system, and a plurality of battery cells connected in series.
  • the performance of the high-voltage power battery system affects the performance and reliability of the vehicle, and the high-voltage power battery system Performance is related to battery cell performance, battery consistency, thermal management systems, and more.
  • the high-voltage power battery pack is composed of several battery cells connected in series. Due to the difference in the manufacturing process of the battery, there is a certain difference in performance between the battery cells; when the battery is in use, the battery will be increased due to different environments. The inconsistency of the cells reduces the operating efficiency of the battery system and shortens the life of the battery.
  • the existing battery equalization charging maintenance generally adopts an energy transfer method or an energy consumption method, and the realization principle is that the management system monitors the voltage of each battery cell. If the voltage difference between the battery cells exceeds the allowable range, the management system controls the relay, and controls The discharge resistor or capacitor is connected to the battery cell that needs to be equalized, thereby achieving energy consumption or transfer of the battery cell, thereby achieving the purpose of equalizing the battery cell, but the cell balancing method is costly and requires a certain amount of consumption. The energy increases the difficulty of mechanical design and thermal management of the battery system. Summary of the invention
  • the invention provides an equalization charging method for a hybrid vehicle power battery
  • the power battery management system issues a battery equalization charging request; b. Charging the power battery, charging to the power battery SOC value reaches 100%;
  • the invention also provides an equalization charging device for a hybrid vehicle power battery implementing the foregoing method, comprising a computer and a program-controlled charger, wherein the computer is connected to the battery management system signal output terminal, the computer signal output terminal is connected to the program-controlled charger, and the program-controlled charger Connect the battery body.
  • the invention further provides an equalization charging device for a hybrid vehicle power battery implementing the foregoing method, comprising a charging controller and a charger, wherein the signal output terminal of the charging controller is connected to the charger, and the charging controller is connected to the battery management system signal output.
  • the charger is connected to the battery body.
  • the invention realizes equalization and maintenance of the power battery by overcharging the power battery, and does not need to change the battery system structure or add other additional devices, so that the equalization charging and maintenance of the power battery is more convenient.
  • Embodiment 1 is a block diagram showing the structure of Embodiment 1 of the present invention.
  • Fig. 2 is a block diagram showing the structure of a second embodiment of the present invention. detailed description
  • Embodiment 1 As shown in FIG. 1 , there is a computer and a program-controlled charger, wherein the computer is connected to the signal output end of the battery management system, the computer signal output terminal is connected to the program-controlled charger, and the program-controlled charger is connected to the battery body.
  • the battery management system transmits an equalization charge request and a power battery SOC value signal to the computer.
  • the battery management system has a balanced charge prediction function.
  • the battery management system is responsible for predicting whether the battery needs to be equalized. When it is predicted that the battery needs to be equalized, the battery management system sends a balanced charging request.
  • This solution is suitable for users of existing program-controlled charging devices.
  • an intelligent equalization charging system can be established, which can reduce the cost of purchasing equipment for users.
  • Embodiment 2 As shown in FIG. 2, having a charging controller and a charger, the charging controller and the charger constitute an independent charging system, wherein the signal output terminal of the charging controller is connected to the charger, and the charging controller is connected to the battery management system signal. At the output end, the charger is connected to the battery body.
  • the battery management system transmits the equalization charging request and the power battery SOC value signal to the charge controller.
  • the battery management system has a balanced charging prediction function, and the battery management system is responsible for predicting whether the battery needs to be advanced. Line equalization charging, when it is predicted that the battery needs to be equalized charging, the battery management system sends a balanced charging request.
  • the power battery equalization charging steps are as follows:
  • the power battery management system issues a battery equalization charging request to the computer or the charging controller;
  • the program-controlled charger or charger charges the power battery, and the SOC value of the power battery reaches 100%; c. The battery continues to be charged with a small current, and the charging time is controlled within a safe time.
  • step b the power battery is first charged with a large current.
  • the SOC value of the power battery reaches a high value
  • the power battery is subjected to constant current charging with a small current.
  • the said SOC value of the power battery reaches a high value, which means that the battery SOC value reaches 90% - 95%; the said small current means that the current is less than 1A - 2A.
  • the battery cells with a large amount of power receive less power, and the battery cells with less power receive more power.
  • the overcharge time increases, the battery power difference is reduced, thereby achieving balanced maintenance of the battery cells.

Description

混合动力车动力电池的均衡充电方法及装置 技术领域
本发明涉及一种混合动力车动力电池的均衡充电方法及装置。 背景技术
在传统汽车基础上， 混合动力汽车增加了高压动力电池系统、 电机系统、 整车控 制器等关键零部件。 其中， 高压动力电池系统由电池管理系统、 高压安全管理系统、 热管理系统及若干个串联的电池单体组成， 高压动力电池系统的性能影响整车的性能 和可靠性， 而高压动力电池系统的性能与电池单体性能、 电池一致性、 热管理系统等 有关。
高压动力电池包由若干个串联的电池单体组成， 由于电池制造工艺的差异性， 电 池单体之间性能存在一定的差异性； 电池在使用过程中， 由于周围环境的不同， 将增 大电池单体的不一致性， 从而降低电池系统的工作效率， 縮短电池的寿命。
为延长电池寿命，增加电池充放电效率，混合动力高压动力电池使用一段时间后， 需要对电池做均衡化充电维护。
现有的电池均衡化充电维护一般采用能量转移法或能量消耗法， 其实现原理是管 理系统监测各电池单体的电压， 如果电池单体间电压差超过允许的范围， 管理系统控 制继电器， 控制放电电阻或电容与需要均衡化的电池单体连接， 从而实现对电池单体 的能量消耗或转移， 达到电池单体均衡化的目的， 但这种电池单体均衡化方法成本高， 需要消耗一定的能量， 增加了机械设计和电池系统热管理的难度。 发明内容
本发明的目的在于提供一种混合动力车动力电池的均衡充电方法及装置， 不需要 改变电池系统结构或增加其它额外的器件即可方便地实现动力电池的均衡化充电维 护。
本发明基于同一发明构思具有三个技术方案：
本发明提供一种混合动力车动力电池的均衡充电方法，
具有以下步骤：
a、 动力电池管理系统发出电池均衡充电请求； b、 对动力电池进行充电， 充电至动力电池 SOC值达到 100% ;
c、 以小电流对动力电池继续充电， 充电时间控制在安全时间内。
本发明还提供了一种实现前述方法的混合动力车动力电池的均衡充电装置， 包括 电脑和程控充电器， 其中电脑接电池管理系统信号输出端， 电脑信号输出端接程控充 电器， 程控充电器接电池本体。
本发明又提供了一种实现前述方法的混合动力车动力电池的均衡充电装置， 包括 充电控制器和充电器， 其中充电控制器的信号输出端接充电器， 充电控制器接电池管 理系统信号输出端， 充电器接电池本体。
本发明具有的有益效果：
本发明通过对动力电池过充， 实现对动力电池的均衡化维护， 不需要改变电池系 统结构或增加其它额外的器件， 使动力电池的均衡化充电维护更加方便。 附图说明
图 1为本发明实施例 1的结构框图；
图 2为本发明实施例 2的结构框图。 具体实施方式
实施例 1 : 如图 1所示， 具有电脑和程控充电器， 其中电脑接电池管理系统信号 输出端， 电脑信号输出端接程控充电器， 程控充电器接电池本体。 电池管理系统将均 衡充电请求、 动力电池 SOC值信号传送至电脑。
电池管理系统具有均衡化充电预测功能， 电池管理系统负责预测电池是否需要进 行均衡化充电， 当预测到电池需要进行均衡化充电， 电池管理系统向发送均衡化充电 请求。
该方案适用于已有程控充电设备的用户， 只需增加软件控制， 即可建立智能均衡 化充电系统， 可降低用户的购置设备的成本。
实施例 2 : 如图 2所示， 具有充电控制器和充电器， 充电控制器和充电器构成独 立的充电系统， 其中充电控制器的信号输出端接充电器， 充电控制器接电池管理系统 信号输出端， 充电器接电池本体。 电池管理系统将均衡充电请求、 动力电池 SOC值信 号传送至充电控制器。
电池管理系统具有均衡化充电预测功能， 电池管理系统负责预测电池是否需要进 行均衡化充电， 当预测到电池需要进行均衡化充电， 电池管理系统向发送均衡化充电 请求。
动力电池均衡化充电步骤如下：
a、 动力电池管理系统向电脑或充电控制器发出电池均衡充电请求；
b、程控充电器或充电器对动力电池进行充电，充电至动力电池 SOC值达到 100%； c、 以小电流对动力电池继续充电， 充电时间控制在安全时间内。
在步骤 b中， 先用大电流对动力电池进行充电， 当动力电池 SOC值达到高值时， 用小电流对动力电池进行恒流充电。所说的动力电池 SOC值达到高值，是指电池 SOC 值达到 90%— 95% ; 所说的小电流是指电流小于 1A— 2A。
这样， 电量多的电池单体接收电量少， 电量少的电池单体接收的电量多， 随着过 充电时间的增加， 电池单体的电量差异性降低， 从而实现电池单体的均衡化维护。

Claims

权利要求书
1、 一种混合动力车动力电池的均衡充电方法， 其特征在于：
具有以下步骤：
a、 动力电池管理系统发出电池均衡充电请求；
b、 对动力电池进行充电， 充电至动力电池 SOC值达到 100% ;
c、 以小电流对动力电池继续充电， 充电时间控制在安全时间内。
2、 根据权利要求 1 所述的混合动力车动力电池的均衡充电方法， 其特征在于： 在步骤 b中， 先用大电流对动力电池进行充电， 当动力电池 SOC值达到高值时， 用小 电流对动力电池进行恒流充电。
3、 根据权利要求 2 所述的混合动力车动力电池的均衡充电方法， 其特征在于： 所说的动力电池 SOC值达到高值， 是指电池 SOC值达到 90%— 95%。
4、 根据权利要求 2或 3所述的混合动力车动力电池的均衡充电方法， 其特征在 于： 所说的小电流是指电流值范围 1A— 2A。
5、 一种实现权利要求 1 所述方法的混合动力车动力电池的均衡充电装置， 其特 征在于： 具有电脑、 程控充电器， 其中电脑接电池管理系统信号输出端， 电脑信号输 出端接程控充电器， 程控充电器接电池本体。
6、 根据权利要求 5 所述的混合动力车动力电池的均衡充电装置， 其特征在于： 电池管理系统将均衡充电请求、 动力电池 SOC值信号传送至电脑。
7、 一种实现权利要求 1 所述方法的混合动力车动力电池的均衡充电装置， 其特 征在于： 具有充电控制器和充电器， 其中充电控制器的信号输出端接充电器， 充电控 制器接电池管理系统信号输出端， 充电器接电池本体。
8、 根据权利要求 7 所述的混合动力车动力电池的均衡充电装置， 其特征在于： 电池管理系统将均衡充电请求、 动力电池 SOC值信号传送至充电控制器。
PCT/CN2009/073477 2008-08-27 2009-08-25 混合动力车动力电池的均衡充电方法及装置 WO2010022643A1 (zh)

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