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公开(公告)号：KR1020140056693A
公开(公告)日：2014-05-12
申请号：KR1020120121798
申请日：2012-10-31
Applicant: 한국전기연구원
IPC: G01R31/36 , G01R19/165
Abstract: A method of estimating a state of charge of a battery relates to a method of estimating the state of charge (SOC) of a battery module having at least one battery cell through a battery management system (BMS) which includes (a) a step where a measuring unit included in the battery management system measures the off potential, which is the open circuit voltage of the battery cell; and (b) a step where a control unit of the battery management system estimates the state of charge corresponding with the off potential measured in step (a) based on a lookup table. The lookup table includes battery cell temperature, charging and discharging numbers and state of charge (SOC) corresponding with the off potential according to the discharge current amount.
Abstract translation: 估计电池的充电状态的方法涉及通过电池管理系统（BMS）估计具有至少一个电池单元的电池模块的充电状态（SOC）的方法，该电池管理系统包括：（a） 包括在电池管理系统中的测量单元测量作为电池单元的开路电压的关闭电位; 以及（b）电池管理系统的控制单元基于查找表来估计与步骤（a）中测量的关闭电位对应的电荷状态的步骤。 查找表包括根据放电电流量对应于关闭电位的电池单元温度，充电和放电次数以及充电状态（SOC）。
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公开(公告)号：KR101463394B1
公开(公告)日：2014-11-21
申请号：KR1020120121798
申请日：2012-10-31
Applicant: 한국전기연구원
IPC: G01R31/36 , G01R19/165
Abstract: 배터리 충전상태의 추정방법은 적어도 하나의 배터리 셀을 포함하는 배터리 모듈의 충전 상태(SOC)를 배터리 관리 시스템(BMS)을 통해 추정하는 방법에 관한 것으로서, (a) 배터리 관리 시스템에 포함된 측정부가 배터리 셀의 순간 개방회로전압인 오프 전위(off potential)를 측정하는 단계와, (b) 배터리 관리 시스템의 제어부가 참조 테이블(lookup table)에 근거하여 (a) 단계에서 측정된 오프 전위에 대응하는 충전 상태값(SOC)을 추정하는 단계를 포함한다. 참조 테이블은 배터리 셀의 온도, 충전 및 방전 횟수, 및 방전 전류량에 따른 상기 측정된 오프 전위에 대응하는 충전 상태값(SOC)을 포함한다.
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公开(公告)号：KR101387658B1
公开(公告)日：2014-04-24
申请号：KR1020120121950
申请日：2012-10-31
Applicant: 한국전기연구원
Abstract: A method of balancing cells of a battery module to save energy, which is a method of balancing voltages of at least two battery cells included in a battery module through a battery management system (BMS), comprises the steps of: measuring, by a measurement unit included in the BMS, an open circuit voltage(OCV), which is a charging voltage, of each battery cell; setting, by a control unit of the BMS, the minimum voltage among the measured open circuit voltages as a balancing voltage; and controlling, by the control unit of the BMS, a switch circuit included in a call balancing unit of the BMS based on the set balancing voltage, to let each of battery cells having open circuit voltages higher than the balancing voltage discharge current such that the battery cells can be balanced to have the balancing voltage and the discharged current can be delivered to a charging battery that is used as a power source for driving the BMS. [Reference numerals] (AA) Battery cell 1; (BB) Battery cell 2; (CC) Battery cell 3; (DD) Battery cell 4; (EE) Battery cell 5; (FF) Battery cell 6; (GG) Battery connector; (HH) One way; (II) Charging device; (JJ) DC/DC convertor; (KK) Protection circuit; (LL) charging battery; (MM) Using as a power source; (NN) BATTERY MANAGEMENT SYSTEMS(BMS) board
Abstract translation: 一种通过电池管理系统（BMS）平衡电池模块中包括的至少两个电池单元的电压的方法，其中电池模块的电池平衡以节省能量的方法包括以下步骤：通过测量 包括在BMS中的单元，作为每个电池单元的充电电压的开路电压（OCV）; 通过BMS的控制单元将测量的开路电压中的最小电压设置为平衡电压; 以及通过BMS的控制单元，基于设定的平衡电压控制包括在BMS的呼叫平衡单元中的开关电路，以使每个电池单元的开路电压高于平衡电压放电电流，使得 电池可以被平衡以具有平衡电压，并且放电电流可以被输送到用作驱动BMS的电源的充电电池。 （附图标记）（AA）电池单元1; （BB）电池2; （CC）电池3; （DD）电池4; （EE）电池5; （FF）电池6; （GG）电池连接器; （HH）单向; （二）充电装置; （JJ）DC / DC转换器; （KK）保护电路; （LL）充电电池; （MM）用作电源; （NN）电池管理系统（BMS）板
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