A diagnostic device diagnoses damage to a breaker that interrupts a current of an energy storage device. The damage to the breaker is diagnosed on the basis of a short-circuit current at a time of an external short circuit.

A rechargeable battery includes an electrode assembly in a case, and a cap assembly coupled to the case, the cap assembly having a cap plate sealing the case, the cap plate including a short-circuit hole and a conductive groove surrounding the short-circuit hole, an inversion plate in the conductive groove of the cap plate, a connection plate covering the short-circuit hole of the cap plate, and a short-circuit member between the connection plate and the inversion plate, the short-circuit member at least partially passing through the short-circuit hole and contacting the connection plate.

Packaging material for a power storage device, comprising at least a substrate layer, an adhesive layer, a metal foil layer and a sealant layer wherein the sealant layer contains an inorganic filler and an occupying ratio of the inorganic filler relative to the total thickness of the sealant layer is 5 to 50%, and also to a packaging material for a power storage device, comprising a substrate layer, a barrier layer and also to a packaging material for power storage device, which comprises a substrate layer, a barrier layer and a sealant layer arranged in this order wherein the barrier layer is made of a metal foil and has a corrosion inhibition treatment layer at least at a side of the sealant layer, and the sealant layer is formed directly on the corrosion inhibition layer, has a thickness of 5 to 30 μm, and contains a high melting point material.

Packaging material for a power storage device, comprising at least a substrate layer, an adhesive layer, a metal foil layer and a sealant layer wherein the sealant layer contains an inorganic filler and an occupying ratio of the inorganic filler relative to the total thickness of the sealant layer is 5 to 50%, and also to a packaging material for a power storage device, comprising a substrate layer, a barrier layer and also to a packaging material for power storage device, which comprises a substrate layer, a barrier layer and a sealant layer arranged in this order wherein the barrier layer is made of a metal foil and has a corrosion inhibition treatment layer at least at a side of the sealant layer, and the sealant layer is formed directly on the corrosion inhibition layer, has a thickness of 5 to 30 μm, and contains a high melting point material.

One aspect of the present invention is an energy storage device that includes an electrode assembly including a positive electrode, a heat resistance layer, a separator, and a negative electrode layered in this order, a peeling strength between the positive electrode and the heat resistance layer being larger than a peeling strength between the heat resistance layer and the separator, and the peeling strength between the heat resistance layer and the separator being larger than a peeling strength between the separator and the negative electrode.

One aspect of the present invention is an energy storage device that includes an electrode assembly including a positive electrode, a heat resistance layer, a separator, and a negative electrode layered in this order, a peeling strength between the positive electrode and the heat resistance layer being larger than a peeling strength between the heat resistance layer and the separator, and the peeling strength between the heat resistance layer and the separator being larger than a peeling strength between the separator and the negative electrode.

A rechargeable electrochemical cell includes a positive electrode having a recharged potential, a negative electrode, and a charge-carrying electrolyte. The rechargeable electrochemical cell further includes an active material having the following structure. (I) ##STR00001##

A rechargeable electrochemical cell includes a positive electrode having a recharged potential, a negative electrode, and a charge-carrying electrolyte. The rechargeable electrochemical cell further includes an active material having the following structure. (I) ##STR00001##

An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer which is disposed between the electrode active material layer and the current collector and which is in contact with the electrode active material layer; wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer.

The energy storage apparatus includes an energy storage device, a circuit breaker connected in series with the energy storage device, a reception unit that receives a discharge instruction to discharge remaining electric power of the energy storage device, and a management unit. The management unit executes protection processing of opening, when a state of charge of the energy storage device drops below a predetermined threshold value, the circuit breaker to protect the energy storage device from overdischarging, and protection release processing of releasing protection of the energy storage device when the discharge instruction is received by the reception unit.