Battery Control System and Battery Control Method
AssigneeHitachi, Ltd.
InventorsKenji Takeda, Kouichi Yokoura
Life of this patent
Estimating the term…
Abstract
A relay (20) receives a battery information acquisition time from each battery module (10) and calculates measurement time differential information Δt, that is, a time difference between the battery information acquisition time as a reference and the battery information acquisition time of another battery module (10) among the received battery information acquisition times, for each battery module (10). A measurement time correction unit (115) of each battery module (10) corrects a measurement time by the measurement time differential information Δt, using the measurement time differential information Δt received from the relay (20) to adjust the battery information acquisition time of each battery module (10) to the same time.
Claims9
A battery control system comprising:
- a plurality of battery modules that acquire battery information including at least voltage of a battery;
- and
- a plurality of relays that are connected to the plurality of battery modules through a communication line and control the plurality of battery modules connected to the plurality of relays,
- wherein the relay includes
- a battery information processing unit that transmits measurement instruction information requesting acquisition of the battery information to each of the plurality of battery modules connected to the relay, and receives the battery information and a battery information acquisition time, that is, a time when the battery information is acquired, from each of the plurality of battery modules, and
- a measurement time differential detecting unit that detects the battery module having an arbitrary battery information acquisition time as a reference, among the received battery information acquisition times, calculates measurement time differential information (Δt), that is, a time difference between the arbitrary battery information acquisition time of the detected battery module and the battery information acquisition time of another battery module for each battery module, and transmits the calculated measurement time differential information (Δt) to each battery module, and
- wherein the battery module includes
- an acquisition time measurement unit that measures the battery information acquisition time of the battery,
- a battery information acquisition unit that measures and acquires the battery information of the battery when the measurement instruction information is received from the relay, acquires the battery information acquisition time of the battery information from the acquisition time measurement unit, and transmits the battery information and the battery information acquisition time thereof to the relay, and
- a measurement time correction unit that receives the measurement time differential information (Δt) from the relay to store the received measurement time differential information (Δt) in a storage unit, and when the battery information acquisition unit receives the measurement instruction information, corrects the starting of the measurement of the battery information by the measurement time differential information (Δt) stored in the storage unit so as to start measuring.
A battery control method of a battery control system which includes a plurality of battery modules that acquire battery information including at least voltage of a battery and a plurality of relays that are connected to the plurality of battery modules through a communication line and control the plurality of battery modules connected to the plurality of relays,
- wherein the relay executes the following steps including:
- transmitting measurement instruction information requesting acquisition of the battery information to each of the plurality of battery modules connected to the relay;
- receiving the battery information and a battery information acquisition time, that is, a time when the battery information is acquired, from each of the plurality of battery modules;
- and
- detecting the battery module having an arbitrary battery information acquisition time as a reference, among the received battery information acquisition times, calculating measurement time differential information (Δt), that is, a time difference between the arbitrary battery information acquisition time of the detected battery module and the battery information acquisition time of another battery module for each battery module, and transmitting the calculated measurement time differential information (Δt) to each battery module, and
- wherein the battery module executes the following steps including:
- measuring the battery information acquisition time of the battery;
- measuring and acquiring the battery information of the battery when the measurement instruction information is received from the relay, acquiring the battery information acquisition time of the battery information, and transmitting the battery information and the battery information acquisition time thereof to the relay;
- and
- receiving the measurement time differential information (Δt) from the relay to store the received measurement time differential information (Δt) in a storage unit, and when the measurement instruction information is received from the relay, correcting the starting of the measurement of the battery information by the measurement time differential information (Δt) stored in the storage unit to start measuring.
Dependencies are inferred from the claim text.