초록 ▼

A device for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provi

A device for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.

대표청구항 ▼

A device for indicating malfunction of at least one voltage cell in a plurality of voltage cells connected in series comprising: means for adding the voltage magnitudes of two adjacent voltage cells of said plurality of voltage cells connected in series at upper and lower voltage points to obtain a

A device for indicating malfunction of at least one voltage cell in a plurality of voltage cells connected in series comprising: means for adding the voltage magnitudes of two adjacent voltage cells of said plurality of voltage cells connected in series at upper and lower voltage points to obtain a sum voltage; means for comparing said sum voltage with a central voltage between said two adjacent voltage cells to obtain an error voltage proportional to the difference between said sum voltage and said central voltage; and switching means for providing an output whenever said error voltage exceeds a predetermined magnitude indicative of a malfunction of at least one of said voltage cells, said switching means having a first transistor connected to conduct whenever said error signal exceeds a predetermined positive voltage and a second transistor connected to conduct whenever said error signal exceeds a predetermined negative voltage.