Voltage measuring device and voltage measuring system
View Patent ↗In a voltage measuring device, according to a setting of input terminals for setting the number of unit cells to be measured SEL 1 , SEL 2 , SEL 3 , a logic circuit turns on switches in a switching circuit connected to the unit cells to measure a voltage across each unit cell.
1. A voltage measuring device comprising:
a voltage measuring member for measuring a voltage across each unit cell in a block comprising a plurality of unit cells connected to each other in series; and a connecting member connecting each unit cell in the block to the voltage measuring member,
wherein the connecting member includes:
a setting member to set the number of the unit cells in the block to be connected to the voltage measuring member;
an address setting member to set a unique address to the block;
a controlling member to connect the connecting member to the voltage measuring member based on the number of the unit cells in the block set by the setting member;
a battery generating member to generate and supply a specific voltage from an inputted voltage; and
a voltage switching member comprising a plurality of first and second switches connected in parallel with one another, the first switches configured for electrical connection with the battery generating member and the second switches configure for electrical connection with the voltage measuring member,
when the setting member sets the number of the unit cells in the block to be connected to the voltage measuring member then the top cell voltage of the unit cell in the block input into the battery generating member via the first switch and the second switch connects each unit cell in the block to the voltage measuring member.
2. A voltage measuring device as claimed in claim 1 , is mounted on each block of the on vehicle high voltage battery which is divided to at least two blocks each having at least one unit cell.
3. The voltage measuring device of claim 1 , wherein the battery generating member comprises a regulator.
4. The voltage measuring device of claim 3 , wherein the regulator generates the specific voltage from the top cell voltage of the unit cell in the block and supplies the specific voltage as a power supply voltage to the voltage measuring device.
5. The voltage measuring device of claim 1 , wherein the voltage measuring member comprises an input interface.
6. The voltage measuring device of claim 5 , wherein the input interface is electrically connected to an A/D converter.
7. The voltage measuring device of claim 6 , wherein the A/D converter is electrically connected to a logic circuit and outputs a digital value of the logic circuit.