Toyota Jidosha Kabushiki Kaisha

Motoi Ito

Keiji Kaita

Yuji Nishi

Hiromasa Tanaka

Yukinari Tanabe

Hiroyuki Kaiya

An electricity storage system includes an electricity storage block including an electricity storage element for performing charging and discharging; a relay switched between an ON state in which the electric storage block is connected to a load and an OFF state in which a connection between the electricity storage block and the load is cut off; a controller for controlling the ON state and the OFF state of the relay; and a current cutoff circuit so as to cut off energization of the electricity storage block. The current cutoff circuit has an alarm circuit to indicate that the electricity storage block is in an overcharged state by comparing a voltage value of the electricity storage block and a threshold; a latch circuit retains the alarm signal; and a transistor receives an output signal of the latch circuit and switches the relay from the ON state to the OFF state.

Electricity storage system

An electrical storage system includes an electrical storage device (); a relay (SMR-B, SMR-G, SMR-P) switching between on/off states; a current interruption circuit () interrupting energization of the electrical storage device by causing the relay to switch from the on state to the off state; and a controller () executing drive control over the relay. The current interruption circuit includes an alarm circuit () outputting an alarm signal indicating overcharging/overdischarging of any one electrical storage block by comparing a voltage value of each electrical storage block with a threshold; a latch circuit () retaining the alarm signal; and a transistor () causing the relay to switch from the on state to the off state upon reception of an output signal of the latch circuit. The controller determines an energization state of the electrical storage device by executing control for turning on the relay while control for causing the alarm circuit to output the alarm signal is being executed.

Electrical storage system

An electrical storage system includes a relay switching between an on state where an electrical storage device () is connected to a load and an off state where connection of the electrical storage device with the load is interrupted; a controller controlling an on-off state of the relay; and a current interruption circuit () interrupting energization of the electrical storage device. The current interruption circuit includes an alarm circuit () outputting an alarm signal indicating that any one electrical storage block is in an overcharged state by comparing a voltage value of each electrical storage block with a threshold; a latch circuit () retaining the alarm signal; a transistor () causing the relay to switch from the on state to the off state upon reception of an output signal of the latch circuit; and a power supply circuit () generating electric power for operating the latch circuit using electric power of the electrical storage device.

An electrical storage system includes: an electrical storage device () including serially connected electrical storage blocks; a relay (SMR-B, SMR-G) switching a connection state between the electrical storage device and a load; a controller () controlling the relay; and a current interruption circuit () interrupting energization of the electrical storage device. The current interruption circuit () includes an alarm circuit () outputting an alarm signal indicating that any one electrical storage block is overcharged or overdischarged by comparing a voltage value of each electrical storage block with a threshold; a latch circuit () retaining the alarm signal; and a transistor () causing the relay to switch from an on state to an off state upon reception of a latch circuit output signal. The controller determines an energization state of the electrical storage device after executing control for causing the alarm circuit to output the alarm signal by changing the voltage value or the threshold.

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Nagoya, Japan

Motoi Ito