Secondary battery having constant-voltage device
Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown voltage of the constant-voltage device is lower than the explosion or ignition voltage of the secondary battery, so the discharge operation may occ...
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Format | Patent |
Language | English |
Published |
15.06.2010
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Online Access | Get full text |
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Abstract | Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown voltage of the constant-voltage device is lower than the explosion or ignition voltage of the secondary battery, so the discharge operation may occur before the secondary battery is exploded or ignited even if the voltage of the secondary battery rises above the overcharge voltage, thereby protecting the secondary battery from explosion or ignition. The leakage current value of the constant-voltage device is less than 0.05% of the capacity value of the secondary battery under the maximum charge voltage of the secondary battery, or the breakdown voltage of the constant-voltage device is higher than the maximum charge voltage of the secondary battery. Thus, the constant-voltage device rarely generates the leakage current even if the secondary battery has been charged with the maximum charge voltage. |
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AbstractList | Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown voltage of the constant-voltage device is lower than the explosion or ignition voltage of the secondary battery, so the discharge operation may occur before the secondary battery is exploded or ignited even if the voltage of the secondary battery rises above the overcharge voltage, thereby protecting the secondary battery from explosion or ignition. The leakage current value of the constant-voltage device is less than 0.05% of the capacity value of the secondary battery under the maximum charge voltage of the secondary battery, or the breakdown voltage of the constant-voltage device is higher than the maximum charge voltage of the secondary battery. Thus, the constant-voltage device rarely generates the leakage current even if the secondary battery has been charged with the maximum charge voltage. |
Author | Ha, Soo Hyun Lee, Jae Hyun Cho, Jeong Ju Lee, Joon Hwan Chang, Sung Kyun Bang, Eui Yong |
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References | (99/39421) 19990800 Supplementary European Search Report for Application No.: 05780549.1-2119; Dated: Apr. 18, 2008. Lee (5861730) 19990100 Oglesbee et al. (6331764) 20011200 (05325943) 19931200 (2003-284237) 20031000 PCT International Search Report for Application No. PCT/KR2005/002680; Date of Mailing International Search Report: Nov. 24, 2005 (All references cited in search report are cited above). Shiner et al. (2003/0076642) 20030400 Sato (2002/0039270) 20020400 Okutoh (6060185) 20000500 (05-325943) 19931200 Omaru et al. (5561005) 19961000 Thomas et al. (6331763) 20011200 (1020050009432) 20050900 Altmejd (4719401) 19880100 Oglesbee et al. (6608470) 20030800 (1020040037547) 20040500 |
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Snippet | Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown... |
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