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    • 2. 发明授权
    • Microcontrolled battery charger
    • 微电脑充电器
    • US06002237A
    • 1999-12-14
    • US89707
    • 1998-06-03
    • Brian Scott Gaza
    • Brian Scott Gaza
    • H01M10/44H02J7/00H01M10/46
    • H02J7/0027H02J7/0004H02J7/0008H02J7/0013H02J7/0047H02J7/0077H02J7/0086H01M10/446
    • A battery charger for fast charging batteries, such as batteries requiring constant current charging, such as lithium ion batteries. The battery charger provides charging voltages across a battery pack having at least one rechargeable cell connected to battery terminals. The battery charger includes a digital to analog converter circuit for controlling a current source for supplying a charging current to the battery pack. The digital to analog converter may provide a constant current or a constant voltage output as a function of the battery characteristics. An analog to digital converter measures a first voltage across the battery pack while the battery pack is being charged and a second voltage across the battery pack while the charging current is interrupted, and a digital processor determines the potential difference between the first voltage and the second voltage to determine a voltage drop across the terminals of the battery pack. A memory stores an optimum voltage level for charging the rechargeable cell, and a digital interface from the processor is used to adjust the setting of the digital to analog converter to provide the optimum voltage level at the rechargeable cell identified from the memory. The battery charger may include dual pockets for charging two battery packs.
    • 用于快速充电电池的电池充电器,例如需要恒流充电的电池,例如锂离子电池。 电池充电器在具有连接到电池端子的至少一个可充电电池的电池组上提供充电电压。 电池充电器包括用于控制向电池组提供充电电流的电流源的数模转换器电路。 数模转换器可提供作为电池特性的函数的恒定电流或恒定电压输出。 当充电电流中断时,模数转换器测量电池组正在被充电时的电池组上的第一电压和电池组两端的第二电压,并且数字处理器确定第一电压和第二电压之间的电位差 电压以确定电池组的端子两端的电压降。 存储器存储用于对可再充电电池充电的最佳电压电平,并且来自处理器的数字接口用于调整数模转换器的设置,以在从存储器识别的可充电电池处提供最佳电压电平。 电池充电器可以包括用于对两个电池组充电的双口袋。
    • 3. 发明授权
    • Microcontrolled battery charger
    • 微控制电池充电器提供恒定电流或恒压充电
    • US5764030A
    • 1998-06-09
    • US818313
    • 1997-03-14
    • Brian Scott Gaza
    • Brian Scott Gaza
    • H01M10/44H02J7/00H01M10/46
    • H02J7/0027H02J7/0004H02J7/0008H02J7/0013H02J7/0047H02J7/0077H02J7/0086H01M10/446
    • A battery charger for use with different types of batteries, such as batteries requiring constant current charging, such as nickel cadmium (NiCd) and nickel metal hydride (NiMH) batteries, as well as batteries which not only require constant current charging, but also require constant voltage charging, such as lithium ion batteries. The battery charger includes a pulse width modulator circuit for controlling a power transistor to provide a constant current or a constant voltage output as a function of the battery characteristics. The battery charger may include dual pockets for charging two modular batteries on a time division multiplex basis. In the dual pocket application, power is divided between the two pockets as a function of the charging characteristics of the battery and the power dissipation of the power transistors used for supplying charging current to the pockets.
    • 用于不同类型电池的电池充电器,例如需要恒流充电的电池,如镍镉(NiCd)和镍金属氢化物(NiMH)电池,以及不仅需要恒流充电的电池,而且还要求 恒压充电,如锂离子电池。 电池充电器包括用于控制功率晶体管以提供作为电池特性的函数的恒定电流或恒定电压输出的脉宽调制器电路。 电池充电器可以包括用于以时分复用为基础对两个模块化电池充电的双口袋。 在双口袋应用中,作为电池的充电特性和用于向袋中提供充电电流的功率晶体管的功率消耗的函数,在两个袋之间分配功率。
    • 4. 发明授权
    • Protection circuit for terminating trickle charge when the battery terminal voltage is greater than a predetermined value
    • US06456046B1
    • 2002-09-24
    • US09748627
    • 2000-12-22
    • Brian Scott Gaza
    • Brian Scott Gaza
    • H01M1046
    • H02J7/0031H02J2007/004
    • A charge termination circuit which may be disposed within the battery cell pack and used in conjunction with known battery safety circuits to protect against charging conditions which reduce the life of a battery cell. In particular, the charge termination circuit is adapted to be used in conjunction with an off the shelf battery safety circuit and one or more power FETs coupled between the battery cell and the battery charger terminals on the battery cell package. The charge termination circuit includes a microcontroller and monitors the battery cell voltage by way of an I/O part and activates a first timer anytime the charging current to the battery is below a predefine threshold, for example, indicative of a maintenance or trickle charge. When the first timer times out after a predetermined time period, for example, two hours, the charge termination current forces the one or more of the serially coupled FETs switches to interrupt battery charging of the battery cells. The charge termination circuit also monitors the battery cell voltage and closes the FETs to allow charging when the cell voltage falls below a predetermined level. As a second level of protection, each time the microcontroller is powered up, a second timer is activated. The second timer is set for a much longer period of time than the first timer, for example, six hours, and is used in the event that the charging current does not fall below the threshold discussed above. The second timer is used to terminate charging by switching the serially coupled power FETs off when the second timer times out. The charge termination circuit is adapted to work in conjunction with conventional battery safety circuit and provide and additional level of functionality with a battery cell package in order to provide protection against operating conditions which reduce battery cell life, heretofore unknown.
    • 5. 发明授权
    • Microcontrolled battery charger
    • 微控制电池充电器提供恒定电流或电压输出作为充电器功耗的函数
    • US5998966A
    • 1999-12-07
    • US45381
    • 1998-03-20
    • Brian Scott Gaza
    • Brian Scott Gaza
    • H01M10/44H02J7/00H01M10/46
    • H02J7/0027H02J7/0004H02J7/0008H02J7/0013H02J7/0047H02J7/0077H02J7/0086H01M10/446
    • A battery charger for use with different types of batteries, such as batteries requiring constant current charging, such as nickel cadmium (NiCd) and nickel metal hydride (NiMH) batteries, as well as batteries which not only require constant current charging, but also require constant voltage charging, such as lithium ion batteries. The battery charger includes a pulse width modulator circuit for controlling a power transistor to provide a constant current or a constant voltage output as a function of the battery characteristics. The battery charger may include dual pockets for charging two modular batteries on a time division multiplex basis. In the dual pocket application, power is divided between the two pockets as a function of the charging characteristics of the battery and the power dissipation of the power transistors used for supplying charging current to the pockets.
    • 用于不同类型电池的电池充电器,例如需要恒流充电的电池,如镍镉(NiCd)和镍金属氢化物(NiMH)电池,以及不仅需要恒流充电的电池,而且还要求 恒压充电,如锂离子电池。 电池充电器包括用于控制功率晶体管以提供作为电池特性的函数的恒定电流或恒定电压输出的脉宽调制器电路。 电池充电器可以包括用于以时分复用为基础对两个模块化电池充电的双口袋。 在双口袋应用中,作为电池的充电特性和用于向袋中提供充电电流的功率晶体管的功率消耗的函数,在两个袋之间分配功率。