Battery apparatus for controlling plural batteries and control method of plural batteries
View Patent ↗Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.
1. A battery apparatus comprising:
a plurality of battery modules each having a plurality of battery cells, said plurality of battery modules being connected in series and being located on a high potential side of the battery apparatus; and
a plurality of first control devices, corresponding to the plurality of battery modules, said first control devices being connected in series in an electrically non-isolated state on the high potential side of the battery apparatus and said first control devices being arranged to receive a command signal from a second control device located on a low potential side of the battery apparatus through a circuit device, said circuit device electrically separating the first control devices located on the high potential side and operating at a first voltage from the second control device located on the low potential side and operating at a second voltage smaller than the first voltage, and wherein said circuit device is configured such that the signal is transmitted from one of the first control devices and the second control device to the other of the first control devices and the second control device while the first control devices are electrically disconnected from the second control device, and wherein the first control devices detect a status of the plurality of battery cells which are included in a corresponding battery module, and
wherein the plurality of first control devices are integrated circuits having input and output signal circuits, and wherein said input signal circuit of one of the first control devices and output signal circuit of another of the first control devices have different reference potentials.
2. A battery apparatus comprising:
a first circuit region having a plurality of battery modules each having a plurality of battery cells, said plurality of battery modules being connected in series, and a plurality of first control devices connected in series in an electrically non-isolated state in said first circuit region, corresponding to the plurality of battery modules, to receive a command signal and detect a status of the plurality of battery cells which are included in a corresponding battery module; and
a second circuit region having a second control device for outputting the command signal to the first circuit region,
wherein the apparatus has a circuit device for electrically separating the first circuit region having a first reference potential from the second circuit region having a second reference potential that is lower than the first reference potential, and wherein said circuit device is configured such that the signal is transmitted from one of the first and second circuit regions to the other of the first and second circuit regions while the first circuit region is electrically disconnected from said second region.
3. The battery apparatus according to claim 1 or 2 , wherein said circuit device transmits the command signal from a low voltage signal line to a high voltage signal line.
4. The battery apparatus according to claim 1 or 2 , wherein said circuit device is a potential converting unit.
5. The battery apparatus according to claim 1 or 2 , wherein said circuit device is an isolating unit.