Method and apparatus for charging rechargeable cells
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02J-007/00
H01M-010/44
출원번호
US-0361838
(2012-11-29)
등록번호
US-9793733
(2017-10-17)
우선권정보
DE-10 2011 087 496 (2011-11-30)
국제출원번호
PCT/EP2012/073994
(2012-11-29)
국제공개번호
WO2013/079611
(2013-06-06)
발명자
/ 주소
Hempel, Jörg
출원인 / 주소
H-Tech AG
대리인 / 주소
Maier & Maier, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
31
초록▼
A method for charging rechargeable cells, in particular lithium ion cells. An apparatus for charging such cells. In order to specify a method for charging a lithium-based cell and an apparatus for charging a lithium-based cell, in which the capacitance of the cell is optimally used, the charging tim
A method for charging rechargeable cells, in particular lithium ion cells. An apparatus for charging such cells. In order to specify a method for charging a lithium-based cell and an apparatus for charging a lithium-based cell, in which the capacitance of the cell is optimally used, the charging time is drastically shortened, the shelf life of the cell is extended and/or it is possible to increase the capacitance of the cell, a method is stated which includes the following steps, pulsed charging of the cell, wherein the charging current IL exceeds the nominal charging current ILmax of the cell during the charging pulses; and the cell is discharged between the charging pulses using load pulses.
대표청구항▼
1. A method for charging a lithium-ion based rechargeable cell, comprising: pulsed charging the cell, wherein a charging current IL, during the charging pulses, exceeds a maximal nominal charging current ILmax of the cell by up to 5-times; anddischarging the cell between the charging pulses by load
1. A method for charging a lithium-ion based rechargeable cell, comprising: pulsed charging the cell, wherein a charging current IL, during the charging pulses, exceeds a maximal nominal charging current ILmax of the cell by up to 5-times; anddischarging the cell between the charging pulses by load pulses, wherein the load pulses are shorter than the charging pulses, andmeasuring a voltage Uz of the cell during each load pulse;checking whether the measured voltage Uz of the cell is equal or greater than an end-of-charge voltage ULmax of the cell;finishing charging of the cell after the measured voltage Uz of the cell at each of a predefined number of load pulses (n) corresponds to an end-of-charge voltage ULmax of the cell, wherein n is greater than or equal to 1,wherein a level of the charging current IL varies in consecutive charging pulses. 2. The method according to claim 1, wherein the charging current IL, during the charging pulses, is more than 1.5 times the maximal nominal charging current ILmax of the cell. 3. The method according to claim 2, wherein the charging current IL is twice the maximal nominal charging current ILmax or greater. 4. The method according to claim 1, wherein a level of the charging current IL, during the charging pulses and/or a height of the load pulses is dependent on a state of the cell. 5. The method according to claim 4, wherein the level of the current during the charging pulses and/or the load pulses is set depending on an internal resistance of the cell and/or a temperature of the cell. 6. The method according to claim 1, wherein a discharging current ILast is a maximum of 20-25 % of the maximal nominal charging current ILmax flows during a load pulse. 7. The method according to claim 1, a level of a discharging current ILast varies in consecutive load pulses. 8. The method according to claim 1, wherein on exceeding a predetermined voltage of the cell, the charging operation is terminated and/or wherein on exceeding a predetermined temperature (Tmax) of the cell the charging operation is terminated. 9. The method according to claim 1, wherein depending on the measured voltage, a level of the charging current IL is set for the subsequent charging pulse, wherein if the measured voltage Uz of the cell lies above a predefined value during the load pulse, the charging current IL is reduced in the next charging pulse. 10. The method according to claim 1, wherein depending on the measured voltage, the level of a discharging current ILast is set for the subsequent load pulse, wherein if the measured voltage Uz of the cell lies above a predefined value during the load pulse, the discharging current ILast is reduced in the next load pulse. 11. The method according to claim 1, where a length of a load pulse corresponds to about one-half of a length of a charging pulse. 12. The method according to claim 1, wherein if the measured voltage Uz of the cell reaches the end-of-charge voltage ULmax during a load pulse, the charging current IL is reduced in the next charging pulse. 13. A device for charging a lithium-ion based rechargeable cell, comprising a controller configured to: pulse charge the cell, wherein a charging current IL, during the charging pulses, exceeds a maximal nominal charging current ILmax of the cell by up to 5-times: anddischarge the cell between the charging pulses by load pulses, wherein the load pulses are shorter than the charging pulses, andfinish charging of the cell after a measured voltage UZ at each of a predefined number of load pulses (n) corresponds to an end of-charge voltage ULmax of the cell, wherein n is greater than or equal to 1,wherein a level of the charging current IL varies in consective charging pulses. 14. The device according to claim 13, further comprising a device for providing a sink in order to discharge the cell during the load pulses, wherein a size of the load pulse can be set. 15. The device according to claim 13, further comprising at least one capacitor to provide the load pulse and/or the charging pulse.
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이 특허에 인용된 특허 (31)
Cummings John A. ; Kates Barry K., Adaptive fast charging of lithium-ion batteries.
Kawakami, Soichiro; Degura, Yasusaburo, Detecting method for detecting internal state of a rechargeable battery, detecting device for practicing said detecting method, and instrument provided with said detecting device.
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