Apparatus and method for detecting failure of battery
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/04
H02J-007/16
H02J-007/00
H01M-010/42
H01M-010/44
H01M-010/48
출원번호
US-0443838
(2012-04-10)
등록번호
US-9231416
(2016-01-05)
우선권정보
KR-10-2011-0105430 (2011-10-14)
발명자
/ 주소
Kim, Duk-Jung
Kwon, Jae-Ik
출원인 / 주소
Samsung SDI Co., Ltd.
대리인 / 주소
Christie, Parker & Hale, LLP
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
An apparatus for detecting a failure of a battery includes a plurality of cell internal pressure sensors each provided in a corresponding one of a plurality of battery cells to measure internal pressure of the battery cells and generate and transmit pressure signals, a sensing unit for receiving the
An apparatus for detecting a failure of a battery includes a plurality of cell internal pressure sensors each provided in a corresponding one of a plurality of battery cells to measure internal pressure of the battery cells and generate and transmit pressure signals, a sensing unit for receiving the pressure signals to sense the internal pressure of the battery cells, a control logic unit for receiving the internal pressure data of each of the battery cells and determining a battery cell having cell internal pressure outside of a predetermined normal range of internal pressure of the battery cell as a failed cell, and a battery control unit for controlling charging or discharging of the other battery cells of the battery except for the failed cell while the failed cell is being repaired or replaced.
대표청구항▼
1. An apparatus for detecting a failure of a battery, comprising: a plurality of cell internal pressure sensors, each provided in a corresponding one of a plurality of battery cells included in a battery, the cell internal pressure sensors each being configured to measure internal pressure of a corr
1. An apparatus for detecting a failure of a battery, comprising: a plurality of cell internal pressure sensors, each provided in a corresponding one of a plurality of battery cells included in a battery, the cell internal pressure sensors each being configured to measure internal pressure of a corresponding one of the plurality of battery cells and generate and transmit pressure signals including internal pressure data corresponding to the measured internal pressure;a sensing unit configured to receive the pressure signals from the plurality of cell internal pressure sensors to sense the internal pressure of each of the plurality of battery cells and configured to sense a cell voltage and a cell temperature of each of the plurality of battery cells; anda control logic unit configured to receive the internal pressure data, the cell voltage, and the cell temperature of each of the plurality of battery cells sensed by the sensing unit and determine whether or not a battery cell from among the plurality of battery cells is a failed cell,wherein, the control logic unit is configured to determine a corresponding battery cell from among the plurality of battery cells as the failed cell having a mechanical defect when the internal pressure of the corresponding battery cell is below a lower limit of a normal range, and when the cell voltage and the cell temperature of the corresponding battery cell are respectively in normal ranges, andwherein the lower limit is atmospheric pressure and the mechanical defect is a leak. 2. The apparatus for detecting a failure of a battery of claim 1, wherein: the control logic unit is configured to generate patterns of normal states for the internal pressure of the battery cells corresponding to a charging or discharging period of the battery cells in advance, and set a normal range of the internal pressure of the battery cells. 3. The apparatus for detecting a failure of a battery of claim 1, wherein: when the internal pressure data is increased above an upper limit of the normal range of the internal pressure of the battery cells, the control logic unit is configured to determine a corresponding battery cell from among the plurality of battery cells having the internal pressure above the upper limit of the normal range as an overcharged cell. 4. The apparatus for detecting a failure of a battery of claim 1, wherein: the cell internal pressure sensor is configured to measure the internal pressure of each of the plurality of battery cells in real time or intermittently. 5. The apparatus for detecting a failure of a battery of claim 1, wherein: the cell internal pressure sensor comprises a piezoelectric sensor, a capacitive pressure sensor, or a strain gauge. 6. The apparatus for detecting a failure of a battery of claim 1, wherein: the sensing unit is further configured to sense information on one or more battery failure determining factors of each of the plurality of battery cells, comprising a battery ambient temperature, humidity, a charging amount, a charging current, a discharging current, and a battery pack voltage. 7. The apparatus for detecting a failure of a battery of claim 1, further comprising: a storage unit coupled with the control logic unit and configured to store the internal pressure data of each of the plurality of battery cells, patterns of normal states for the internal pressure of the battery cells corresponding to a charging or discharging period of the battery, a set value of the normal range of the internal pressure of the battery cells, information on a battery failure determining factor which is further sensed by the sensing unit, and information on a current state of charge (SOC) or state of health (SOH) of the battery. 8. A method for detecting a failure of a battery, comprising: generating cell internal pressure patterns, cell voltage patterns, and cell temperature patterns of normal states by measuring internal pressures, cell voltages, and cell temperatures of a plurality of battery cells included in the battery for a period of time when the battery is normally charged and discharged;setting normal ranges of the internal pressures, the cell voltages, and the cell temperatures of the battery cells respectively according to the cell internal pressure patterns, the cell voltage patterns, and the cell temperature patterns of the normal states;receiving internal pressure data of each of the plurality of battery cells from a cell internal pressure sensor, cell voltage data from a voltage sensor, and cell temperature data from a temperature sensor;comparing the internal pressure data with the cell internal pressure patterns of the normal state, and determining whether the internal pressure is below a lower limit of the normal range of the internal pressure of the battery cell;comparing the cell voltage data with the cell voltage patterns of the normal state and the cell temperature data with the cell temperature patterns of the normal state, and determining whether the cell voltage and the cell temperature are respectively in the normal ranges; anddetermining a corresponding battery cell from among the plurality of battery cells of which the internal pressure is below the lower limit of the normal range of the internal pressure of the battery cell and the cell voltage and the cell temperature are respectively in the normal ranges as a failed cell having a mechanical defect,wherein the lower limit is atmospheric pressure and the mechanical defect is a leak. 9. The method for detecting a failure of a battery of claim 8, further comprising: controlling charging or discharging of the other battery cells of the battery except for the failed cell while the failed cell is repaired or replaced. 10. The method for detecting a failure of a battery of claim 8, wherein: when the internal pressure data of each of the plurality of battery cells is increased above an upper limit of the normal range of the internal pressure of the battery cell, a corresponding battery cell from among the plurality of battery cells is determined as an overcharged cell. 11. The method for detecting a failure of a battery of claim 8, wherein: the internal pressure of each of the plurality of battery cells is measured in real time or intermittently. 12. The apparatus for detecting a failure of a battery of claim 1, further comprising: a battery control unit configured to control charging or discharging of the other battery cells from among the battery cells of the battery except for the failed cell while the failed cell is repaired or replaced. 13. The apparatus for detecting a failure of a battery of claim 12, further comprising: a power control unit configured to assist in supplying power to an external power system coupled to the battery in response to the determination of the failed cell by the control logic unit. 14. The apparatus for detecting a failure of a battery of claim 13, further comprising: a communication unit coupled to the battery control unit and the power control unit and configured to perform internal communication within the apparatus for detecting a failure of the battery or perform communication between the apparatus for detecting a failure of the battery and an external system coupled to the battery.
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이 특허에 인용된 특허 (2)
Bor Yann Liaw ; Xiao-Guang Yang, Pressure-based battery charging.
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