Accurate voltage measurement system using relay isolated circuits
AssigneeEnova Systems
InventorDennis H. Kang
Life of this patent
Estimating the term…
Abstract
A system for measuring voltages of batteries in a battery pack. The system has an isolation circuit operative to isolate a voltage for each of the batteries. A buffer of the system is in electrical communication with the isolation circuit and operative to store the voltage of each of the batteries when the batteries are isolated. The system further includes a voltage measuring device in electrical communication with the buffer. The voltage measuring device is operative to measure the voltage in the buffer and provide a stable measurement of the battery voltages therefrom.
Claims21
A system for measuring voltages of batteries in a battery pack, the system comprising:
- an isolation circuit having a relay and operative to isolate a voltage of each of the batteries;
- a buffer in electrical communication with the isolation circuit and operative to store the voltage of each of the batteries when the batteries are isolated from the buffer by the relay;
- and
- a voltage measuring device in electrical communication with the buffer, the voltage measuring device being operative to measure the voltages in the buffer and provide a stable measurement of the battery voltages therefrom.
A voltage measurement system for l batteries configured in m battery banks, each battery bank having n batteries, the measurement system comprising:
- l isolation circuits, each of the isolation circuits in electrical communication with a respective one of the l batteries and having a relay and an energy storage device;
- n buffers, each of the n buffers in electrical communication with a respective one of the l isolation circuits and operative to store the voltage of the battery when isolated;
- and
- n voltage measuring devices in electrical communication with a respective one of the n buffers, each voltage measuring device being operative to measure the voltage in the respective buffer and provide a stable measurement of the battery voltage therefrom.
A method of measuring the voltages of batteries in a battery pack, the method comprising the steps of:
- a) storing the voltage of a respective one of the batteries in a capacitor;
- b) isolating the battery from the energy storage device with a relay;
- c) storing the voltage from the energy storage device in a buffer;
- and
- d) measuring the voltage from the buffer with a voltage measuring device.
A system for measuring voltages of batteries in a battery pack, the system comprising:
- an isolation circuit operative to isolate a voltage of each of the batteries;
- a buffer in electrical communication with the isolation circuit and operative to store the voltage of each of the batteries when the batteries are isolated;
- a voltage measuring device in electrical communication with the buffer, the voltage measuring device being operative to measure the voltages in the buffer and provide a stable measurement of the battery voltages therefrom;
- and
- a temperature sensor operative to detect the temperature of the battery pack.
Dependencies are inferred from the claim text.