A method for manufacturing a laminated battery in which a plurality of unit battery cells each having a negative-electrode layer, a positive-electrode layer, and a solid electrolyte layer located between the negative-electrode layer and the positive-electrode layer are laminated, the method including: measuring respective characteristics of the plurality of unit battery cells; laminating the plurality of unit battery cells, the characteristics of the plurality of unit battery cells being measured; and on the basis of the respective characteristics of the plurality of unit battery cells laminated in the laminating, adjusting areas of the plurality of unit battery cells which are laminated by collectively cutting the plurality of unit battery cells which are laminated and thereby so that a battery capacity of the laminated battery falls within a predetermined range of value.

A method for manufacturing a laminated battery in which a plurality of unit battery cells each having a negative-electrode layer, a positive-electrode layer, and a solid electrolyte layer located between the negative-electrode layer and the positive-electrode layer are laminated, the method including: measuring respective characteristics of the plurality of unit battery cells; laminating the plurality of unit battery cells, the characteristics of the plurality of unit battery cells being measured; and on the basis of the respective characteristics of the plurality of unit battery cells laminated in the laminating, adjusting areas of the plurality of unit battery cells which are laminated by collectively cutting the plurality of unit battery cells which are laminated and thereby so that a battery capacity of the laminated battery falls within a predetermined range of value.

Testing of a battery module can be conducted using monitoring electronics attached to the battery module. Stimulus can be applied to the battery module and removed. After removal of the stimulus, the monitoring electronics can collect signals from the monitoring electronics reflecting parameters of the battery module as it relaxes back to a non-stimulated state. The stimulus can be provided by test equipment or by components of a system in which the battery module, having attached monitoring electronics, is implemented. The monitoring electronics attached to the battery module can provide autonomous recording of signals associated with the battery module that can provide data regarding the status of the battery module or one or more batteries contained in the battery module.

A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

There is provided a device or the like capable of improving the convenience of reproduction under various conditions of the characteristics of a secondary battery by using a simulated battery. Based on the communication between the electronics and/or the charger coupled to the electronics, and the simulated battery control device, the operation of the simulated battery mounted on the electronics is controlled, and the voltage corresponding to the current command value is applied to the specified load. Then, the operating characteristic information corresponding to the operating characteristic of the specified load corresponding to the applied voltage is output to the output interface of the electronics. The operating characteristics of the specified load can be grasped when voltage corresponding to the current command value is applied to the specified load of the electronics, and therefore the convenience of the user of the electronics can be improved.

The invention relates to a battery management system for a lithium ion battery of an electrical appliance, in particular an electrical hand tool or electrical gardening tool, which is configured in order to determine a difference between a current required by the electrical appliance and a predetermined measuring current which can be provided electrochemically by means of the lithium ion battery, and to cover the difference using a dielectric capacitance of the lithium ion battery in so far as this does not result in departure from predetermined acceptable operating states of the lithium ion battery. The invention further relates to a method for operating a lithium ion battery of an electrical appliance.

The invention relates to a battery management system for a lithium ion battery of an electrical appliance, in particular an electrical hand tool or electrical gardening tool, which is configured in order to determine a difference between a current required by the electrical appliance and a predetermined measuring current which can be provided electrochemically by means of the lithium ion battery, and to cover the difference using a dielectric capacitance of the lithium ion battery in so far as this does not result in departure from predetermined acceptable operating states of the lithium ion battery. The invention further relates to a method for operating a lithium ion battery of an electrical appliance.

A battery pack, which may accurately detect swelling of a battery cell according to a situation. The battery pack includes a battery cell having an electrode assembly, an electrolyte, a battery case and an electrode terminal; a deformation measuring unit at least partially attached to an outer surface of the battery case of the battery cell and configured to measure whether the battery case is deformed; an impedance measuring unit connected to the electrode terminal of the battery cell and configured to measure impedance inside the battery cell; and a control unit configured to determine whether the battery cell is swelled by using a deformation measurement result of the deformation measuring unit and an impedance measurement result of the impedance measuring unit.

A battery pack, which may accurately detect swelling of a battery cell according to a situation. The battery pack includes a battery cell having an electrode assembly, an electrolyte, a battery case and an electrode terminal; a deformation measuring unit at least partially attached to an outer surface of the battery case of the battery cell and configured to measure whether the battery case is deformed; an impedance measuring unit connected to the electrode terminal of the battery cell and configured to measure impedance inside the battery cell; and a control unit configured to determine whether the battery cell is swelled by using a deformation measurement result of the deformation measuring unit and an impedance measurement result of the impedance measuring unit.

A method for calculating a short-circuit current of a battery. includes: obtaining an integral state of charge and a current state of charge of the battery; calculating a first difference based on the integral state of charge and the current state of charge; calculating the short-circuit current of the battery based on the first difference; obtaining a first real state of charge and a second real state of charge; updating the first real state of charge and the second real state of charge based on a temperature-impedance table and the short-circuit current of the battery; calculating a second difference based on the updated first real state of charge and the updated second real state of charge; and updating the short-circuit current of the battery based on the second difference.