Electricity storage system
First Claim
1. An electricity storage system comprising:
- an electricity storage block including an electricity storage element for performing charging and discharging and capable of being connected to a load;
a relay configured to be switched between an ON state and an OFF state, the electricity storage block and the load being connected when the relay is in the ON state, and a connection between the electricity storage block and the load being cut off when the relay is in the OFF state;
a controller configured to control the ON state and the OFF state of the relay; and
a current cutoff circuit configured to switch the relay from the ON state to the OFF state, so as to cut off energization of the electricity storage block,the current cutoff circuit including;
an alarm circuit configured to output an alarm signal indicating 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 for retaining the alarm signal; and
a transistor configured to receive an output signal from the latch circuit and switching the relay from the ON state to the OFF state.
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Accused Products
Abstract
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.
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Citations
10 Claims
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1. An electricity storage system comprising:
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an electricity storage block including an electricity storage element for performing charging and discharging and capable of being connected to a load; a relay configured to be switched between an ON state and an OFF state, the electricity storage block and the load being connected when the relay is in the ON state, and a connection between the electricity storage block and the load being cut off when the relay is in the OFF state; a controller configured to control the ON state and the OFF state of the relay; and a current cutoff circuit configured to switch the relay from the ON state to the OFF state, so as to cut off energization of the electricity storage block, the current cutoff circuit including; an alarm circuit configured to output an alarm signal indicating 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 for retaining the alarm signal; and a transistor configured to receive an output signal from the latch circuit and switching the relay from the ON state to the OFF state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. An electricity storage system comprising:
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an electricity storage block including an electricity storage element for performing charging and discharging; a relay configured to be switched between an ON state and an OFF state, the electricity storage block and the load being connected when the relay is in the ON state, and a connection between the electricity storage block and the load being cut off when the relay is in the OFF state; a controller configured to control the ON state and the OFF state of the relay; and a current cutoff circuit configured to switch the relay from the ON state to the OFF state, so as to cut off energization of the electricity storage block, the current cutoff circuit including; an alarm circuit configured to output an alarm signal indicating that the electricity storage block is in an overcharged state by comparing a voltage value of the electricity storage block and a threshold; the alarm circuit including a comparator, the comparator having a hysteresis characteristic that is larger than a voltage drop amount of the electricity storage block after the energization of the electricity storage block is cut off, and a transistor configured to receive an output signal of the alarm circuit and switch the relay from the ON state to the OFF state.
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Specification