公开(公告)号：US20070042269A1

公开(公告)日：2007-02-22

申请号：US11506357

申请日：2006-08-18

申请人： Sung Chang ,  Eui Bang ,  Min Jang ,  Sang Choy ,  Ki Lee

发明人： Sung Chang ,  Eui Bang ,  Min Jang ,  Sang Choy ,  Ki Lee

IPC分类号： H01M4/48 ,  H01M4/04 ,  H01M4/50

CPC分类号： H01M4/1391 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  Y02E60/122 ,  Y10T29/49108

摘要： Disclosed is a method for preparing an electrochemical device, comprising the steps of: charging an electrochemical device using an electrode active material having a gas generation plateau potential in a charging period to an extent exceeding the plateau potential; and degassing the electrochemical device. An electrochemical device, which comprises an electrode active material having a gas generation plateau potential in a charging period, and is charged to an extent exceeding the plateau potential and then degassed, is also disclosed. Some electrode active materials provide high capacity but cannot be applied to a high-capacity battery due to the gas generation. This is because a battery using such electrode active materials should be charged to an extent exceeding the gas generation plateau potential in order to realize a high capacity. To solve the problems caused by the gas generation, the battery is charged to an extent exceeding the plateau potential, and then degassed. In other words, the problems including variations in outer shape of a battery and degradation in cycle life characteristics and C-rate characteristics of a battery can be solved. After the first cycle, the battery can be charged to an extent exceeding the plateau potential with no further gas generation, thereby providing a significant increase in capacity.

摘要翻译： 公开了一种用于制备电化学装置的方法，包括以下步骤：在充电期间将具有气体发生平台电位的电极活性材料装入电化学装置至超过平台电位的程度; 并使电化学装置脱气。 还公开了一种电化学装置，其包括在充电期间具有气体发生平台电位的电极活性材料，并且被装入超过平稳电位然后脱气的程度。 一些电极活性材料由于产生气体而提供高容量但不能应用于高容量电池。 这是因为为了实现高容量，使用这种电极活性物质的电池应该被充入超过气体发生平台电位的程度。 为了解决由气体产生引起的问题，将电池充电到超过平稳电位的程度，然后脱气。 换句话说，可以解决包括电池的外形变化和循环寿命特性的劣化以及电池的C速率特性的问题。 在第一次循环之后，可以将电池充电到超过平稳电位的程度，而不会进一步产生气体，从而提供显着的容量增加。

公开(公告)号：US20070037043A1

公开(公告)日：2007-02-15

申请号：US11491215

申请日：2006-07-21

申请人： Sung Chang ,  Eui Bang ,  Min Jang ,  Sang Choy ,  Ki Lee

发明人： Sung Chang ,  Eui Bang ,  Min Jang ,  Sang Choy ,  Ki Lee

IPC分类号： H01M10/44 ,  H01M4/48

CPC分类号： H01M4/0438 ,  H01M4/0445 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052

摘要： Disclosed is a pretreatment method for activating an electrode active material having a certain range of potential plateau beyond a redox potential range of a transition metal forming the electrode active material, which comprises charging the electrode active material to an extent exceeding the potential plateau at least once, so as to increase capacity of the electrode active material. Also, disclosed is an electrochemical device comprising the electrode active material activated by the pretreatment method and designed to be subjected to charge/discharge cycles at a voltage lower than the potential plateau. When the electrode active material pretreated by charging it to an extent exceeding the potential plateau is subjected to charge/discharge cycles at a lower voltage, it is possible to significantly increase the capacity of the electrode active material as compared to the capacity of the non-pretreated electrode active material charged/discharged at the same voltage. It is also possible to inhibit reactivity of an electrolyte by performing charging/discharging at a lower voltage from the charge cycle subsequent to the pretreatment.

摘要翻译： 公开了一种用于激活具有一定范围的电位平台的电极活性材料的预处理方法，该电极活性材料超过形成电极活性材料的过渡金属的氧化还原电势范围，其包括将电极活性材料充电到超过电势平台的程度至少一次 ，以增加电极活性材料的容量。 此外，公开了一种电化学装置，其包括通过预处理方法活化的电极活性材料，并设计为在低于电位平台的电压下进行充电/放电循环。 当通过将其充电到超过电位平台的程度预处理的电极活性材料在较低电压下进行充电/放电循环时，可以显着提高电极活性材料的容量， 预处理的电极活性物质以相同的电压充/放电。 还可以通过在预处理之后的充电循环中以较低电压进行充电/放电来抑制电解质的反应性。

公开(公告)号：US20060197506A1

公开(公告)日：2006-09-07

申请号：US11361819

申请日：2006-02-24

申请人： Sung Chang ,  Jae Lee ,  Joon Lee ,  Soo Ha ,  Sang Choy ,  Jeong Cho

发明人： Sung Chang ,  Jae Lee ,  Joon Lee ,  Soo Ha ,  Sang Choy ,  Jeong Cho

IPC分类号： H02J7/00

CPC分类号： H01M10/425 ,  H01M10/46 ,  H02J7/0031 ,  H02J2007/0037

摘要： The present invention relates to an apparatus for protecting a secondary battery by preventing overcharge of the secondary battery. The apparatus for protecting a secondary battery includes: a secondary battery; a power supply, connected with both electrode terminals of the secondary battery, for providing a charging voltage and a charging current to the secondary battery to charge the secondary battery; and a secondary battery protection unit for shorting the power supply thereby to stop charging the secondary battery if a charging voltage of the secondary battery is above a predetermined voltage.

公开(公告)号：US20050287440A1

公开(公告)日：2005-12-29

申请号：US11112170

申请日：2005-04-22

申请人： Sung Chang ,  Hyeong Kim ,  Sang Choy ,  Jeong Cho

发明人： Sung Chang ,  Hyeong Kim ,  Sang Choy ,  Jeong Cho

IPC分类号： H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/40 ,  H01M4/48 ,  H01M4/50 ,  H01M4/52 ,  H01M4/62 ,  H01M10/36 ,  H01M10/38 ,  H01M10/40 ,  H01M4/58

CPC分类号： H01M4/366 ,  H01M4/0402 ,  H01M4/0416 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/40 ,  H01M4/58 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/058 ,  H01M2004/027

摘要： Disclosed is an anode active material, comprising: (a) a carbonaceous material; and (b) a carbide coating layer partially or totally formed on a surface of the carbonaceous material, the carbide coating layer comprising at least one element selected from the group consisting of metals and metalloids. An anode obtained by using the anode active material and an electrochemical device comprising the anode are also disclosed. The carbonaceous material comprises a coating layer of metal-/metalloid-carbide obtained by treating it at high temperature under inert atmosphere, wherein the coating layer has increased interfacial boding force to the carbonaceous material and thus shows minimized reactivity to lithium. The carbonaceous material as anode active material can minimize the irreversible anode capacity needed for the formation of an SEI film during the first charge/discharge cycle, thereby providing high capacity, high efficiency and significantly improved anode qualities.

摘要翻译： 公开了一种阳极活性材料，其包含：（a）碳质材料; 和（b）部分或全部形成在所述碳质材料的表面上的碳化物涂层，所述碳化物涂层包含选自金属和准金属的至少一种元素。 还公开了通过使用阳极活性材料获得的阳极和包括阳极的电化学装置。 含碳材料包括通过在惰性气氛下在高温下处理而获得的金属/ /类金刚石碳化物的涂层，其中涂层对碳质材料具有增加的界面粘合力，因此显示出对锂的反应性最小化。 作为阳极活性材料的碳质材料可以使在第一充电/放电循环期间形成SEI膜所需的不可逆阳极容量最小化，从而提供高容量，高效率和显着改善的阳极质量。

公开(公告)号：US20070072060A1

公开(公告)日：2007-03-29

申请号：US11490359

申请日：2006-07-20

申请人： Sung Chang ,  Joon Lee ,  Jae Lee ,  Soo Ha ,  Jeong Cho ,  Sang Choy

发明人： Sung Chang ,  Joon Lee ,  Jae Lee ,  Soo Ha ,  Jeong Cho ,  Sang Choy

IPC分类号： H01M10/50 ,  G01K7/00

CPC分类号： H01M10/00 ,  H01M10/0525 ,  H01M10/443 ,  H01M10/486 ,  H01M2200/10 ,  H01M2200/105 ,  H02J7/0029

摘要： Disclosed is an apparatus for protecting a secondary battery, in which, when the secondary battery such as a lithium-ion secondary battery is exposed to high temperature exceeding a working range due to a change in external environment, external impacts, and so on, or heated due to spontaneous generation of heat caused by internal defects, the secondary battery is discharged. The apparatus includes a thyristor or transistor having an anode and a cathode connected both terminals of the secondary battery respectively, and shorting both terminals of the secondary battery when gate current is supplied, and a temperature sensor detecting temperature of the secondary battery and supplying the gate current to the thyristor or transistor when the detected temperature is higher than predetermined temperature. Thereby, when the temperature of the secondary battery increases due to any one of a change in external environment, external impacts, heat generation of the battery caused by internal defects, overcharge, and the like, the secondary battery is discharged into a safe state, so that it is possible to prevent the secondary battery from swelling, inflammation, or detonation to thus improving safety.

摘要翻译： 公开了一种用于保护二次电池的装置，其中当诸如锂离子二次电池的二次电池由于外部环境变化，外部冲击等而暴露于超过工作范围的高温时，或 由于内部缺陷引起的热量的自发产生加热，二次电池被排出。 该装置包括分别连接二次电池的两个端子的阳极和阴极的晶闸管或晶体管，并且当提供栅极电流时短路二次电池的两个端子，以及温度传感器检测二次电池的温度并提供栅极 当检测到的温度高于预定温度时，电流流向晶闸管或晶体管。 因此，当由于外部环境的变化，外部冲击，由内部缺陷引起的电池的发热，过度充电等中的任何一种而使二次电池的温度升高时，二次电池被放电到安全状态， 使得可以防止二次电池膨胀，炎症或爆炸，从而提高安全性。