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    • 1. 发明授权
    • Overcharge current protection circuit and battery pack using same
    • 过充电保护电路和电池组使用相同
    • US5602460A
    • 1997-02-11
    • US430669
    • 1995-04-28
    • Jose M. FernandezVernon MeadowsErika D. MackIilonga P. Thandiwe
    • Jose M. FernandezVernon MeadowsErika D. MackIilonga P. Thandiwe
    • H02J7/00H02J7/04
    • H02J7/0031
    • A battery pack (62) comprises cells (74), and is charged by a charger (64) providing a current level. The charger (64) is a typical nickel-cadmium battery charger providing a first charge current level in excess of an optimum charge current level. The battery pack (62) further comprises a thermal sensing element (76) and an overcurrent charge protection circuit having an overcurrent switch (78), current sense circuit (80), comparator circuit (82), and temperature signal switch (84). If the current level through the cells (74) exceeds the optimum charge current level, the current sense circuit (80) provides a signal to comparator circuit (82) which actuates the temperature signal switch (84), simulating a hot battery pack. The charger (64) then switches to a second charge current level which does not exceed the optimum charge current level. If the charger (64) does not change current levels, a switch delay (86), after a brief period, accumulates enough voltage to actuate a driver switch (88) which opens the overcurrent switch (78), disconnecting the cells (74) from the charger (64).
    • 电池组(62)包括电池(74),并由提供电流电平的充电器(64)充电。 充电器(64)是典型的镍镉电池充电器,其提供超过最佳充电电流电平的第一充电电流电平。 电池组(62)还包括热敏元件(76)和具有过电流开关(78),电流检测电路(80),比较器电路(82)和温度信号开关(84)的过电流充电保护电路。 如果通过单元(74)的电流电平超过最佳充电电流电平,则电流感测电路(80)向比较器电路(82)提供信号,该电路致动温度信号开关(84),模拟热电池组。 然后,充电器(64)切换到不超过最佳充电电流电平的第二充电电流电平。 如果充电器(64)不改变电流水平,则在短时间之后,开关延迟(86)累积足够的电压以致动打开过电流开关(78)的驱动器开关(88),断开电池(74), 从充电器(64)。
    • 2. 发明授权
    • Idle current cutoff circuit
    • 空闲电流截止电路
    • US5691622A
    • 1997-11-25
    • US578845
    • 1995-12-26
    • Erika D. MackJose M. Fernandez
    • Erika D. MackJose M. Fernandez
    • H02J7/00
    • H02J7/0031
    • A cutoff switch (40) separates the reference line (20) of a control circuit (18) from the B- line (24). The cutoff switch is in an electrically open state until the function of the control circuit is required, thus eliminating current flow through the control circuit when the function of the control circuit is not required. To enable the control circuit, a threshold switch (42) is provided to cause the cutoff switch to change states when the battery voltage reaches a predetermined level. To provide an override, a diode is connected between an auxiliary line (26), used a thermistor (28), for example.
    • 截止开关(40)将控制电路(18)的参考线(20)与B-线(24)分开。 截止开关处于电开状态,直到需要控制电路的功能,从而在不需要控制电路的功能时,消除了通过控制电路的电流。 为了启用控制电路,提供阈值开关(42),以在电池电压达到预定电平时使截止开关改变状态。 为了提供覆盖,二极管连接在例如使用热敏电阻(28)的辅助线(26)之间。
    • 3. 发明授权
    • Overvoltage disconnect circuit for lithium ion batteries
    • 锂离子电池过压断路电路
    • US5637413A
    • 1997-06-10
    • US543549
    • 1995-10-16
    • Jose M. FernandezErika D. Mack
    • Jose M. FernandezErika D. Mack
    • H02J7/00H01M14/00
    • H02J7/0031
    • A lithium ion or similar lithium secondary battery pack (10) includes an overvoltage disconnect circuit having an overvoltage disconnect switch (14), a voltage detector (16), and a delay circuit (18). The battery pack is connectable to a recharger which was not designed to accomodate the charge regime of the lithium ion cell or cells (12), such as a nickel system recharger (20). The voltage detector samples the battery voltage and changes its output signal if the battery voltage reaches an upper voltage threshold. The output of the voltage detector will not revert back until the battery voltage drops to a lower voltage threshold, which is below the upper voltage threshold.
    • 锂离子或类似的锂二次电池组(10)包括具有过电压断开开关(14),电压检测器(16)和延迟电路(18)的过电压断开电路。 电池组可连接到不被设计成容纳锂离子电池(12)的电荷状态的充电器,例如镍系统充电器(20)。 如果电池电压达到上限电压阈值,电压检测器将对电池电压进行采样并改变其输出信号。 电压检测器的输出将不会恢复,直到电池电压下降到低于上限电压阈值的较低电压阈值。
    • 7. 发明授权
    • Protection switch for a battery powered device
    • 电池供电设备的保护开关
    • US5539299A
    • 1996-07-23
    • US332166
    • 1994-10-31
    • Jose M. FernandezScott M. GarrettVernon Meadows
    • Jose M. FernandezScott M. GarrettVernon Meadows
    • H01M10/44H02H7/18H02J7/00H02J7/10H02J7/06
    • H02J7/0031
    • A battery pack 12 for powering a device 14 sensitive to input voltage contains a protection switch 28 and a control circuit 26. When the battery pack 12 is charged by a charger 10 and the voltage of the battery pack approaches the maximum safe level of the device 14, the control circuit 26 causes the protection switch 28 to electrically switch open to protect the device 14 from excessive voltage potentially output by the charger. Where the cells 16 are lithium ion cells or a type having a maximum safe voltage, a safety switch 49 is included to interrupt charge current 52 through the cells 16. The safety switch 49 is delayed by resistor/capacitor network 51, 53 so that it switches after the protection switch 28. The safety switch 49 includes a diode 58 to allow the device 14 to remain powered while the safety switch is blocking charge current. Further, diodes 40 and 42 are required to eliminate measurement error of the control circuit 26 if the battery pack 12 is charged through the device contacts 20 and 24.
    • 用于为对输入电压敏感的装置14供电的电池组12包含保护开关28和控制电路26.当电池组12由充电器10充电并且电池组的电压接近装置的最大安全水平时 如图14所示,控制电路26使保护开关28电开关,以保护装置14免受充电器可能输出的过大电压。 在单元16是锂离子电池或具有最大安全电压的类型的情况下,包括安全开关49以通过电池单元16中断充电电流52.安全开关49由电阻器/电容器网络51,53延迟,使得 在保护开关28之后切换。安全开关49包括二极管58,以允许设备14在安全开关阻塞充电电流时保持供电。 此外,如果电池组12通过设备触点20和24充电,则二极管40和42需要消除控制电路26的测量误差。
    • 10. 发明授权
    • Overvoltage disconnect circuit and battery using same
    • 过压断路电路和电池使用相同
    • US5695886A
    • 1997-12-09
    • US612470
    • 1996-03-07
    • Sudeep S. DewanJose M. FernandezVernon Meadows
    • Sudeep S. DewanJose M. FernandezVernon Meadows
    • H01M10/46H02J7/00
    • H01M10/46H02J7/0011H02J7/0031
    • A lithium ion battery is provided with an overvoltage switch (12) and an overvoltage control circuit (14). The overvoltage control circuit causes the overvoltage switch to open, thus disconnecting the battery from a charger, upon the battery voltage reaching a first predetermined level when charged by a charger not designed to charge a lithium ion battery. However, when the battery is connected to an appropriately designed charger, the battery receives an input signal through an input terminal (24) which causes the overvoltage control circuit to open the overvoltage switch at a higher second predetermined level, should the appropriately designed charger fail to enter voltage regulation when the battery voltage reaches the first predetermined level.
    • 锂离子电池设有过电压开关(12)和过电压控制电路(14)。 当由未设计为对锂离子电池充电的充电器进行充电时,过电压控制电路使得过电压开关打开,从而将电池从充电器断开,当电池电压达到第一预定水平时。 然而,当电池连接到适当设计的充电器时,如果适当设计的充电器故障,则电池通过输入端子(24)接收输入信号,该输入端子使得过电压控制电路以更高的第二预定水平打开过电压开关 当电池电压达到第一预定水平时进入电压调节。