In an arithmetic system, a data acquisition unit acquires operation data at least including a voltage of a battery mounted on an identical product (for example, an electrically-driven vehicle of an identical vehicle type) and a state of charge (SOC) from a plurality of individuals of the product via a network. A detector statistically processes the plurality of pieces of acquired operation data to detect an individual on which a battery different from specifications of the product is mounted.

Provided is a battery pack comprising a plurality of batteries; and a plurality of memories that correspond respectively to the batteries and that each record deterioration information of the corresponding battery. Each set of a battery and a corresponding memory may be formed integrally as a battery cell. As a result, the deterioration information of each battery cell can be known even after the battery pack is disassembled.

The present disclosure relates to a battery test system for a vehicle that includes a camera configured to capture an image of a vehicle identification number located on the vehicle, the camera being coupled to a processor which determines characters of the vehicle identification number from the image of the camera and correlates the characters of the vehicle identification number to a vehicle identification number database to receive battery parameters for the vehicle, a battery tester that is removably connected to terminals of a battery of the vehicle and configured to receive battery test results, and a display which conveys information relating to the battery parameters and the battery test results.

The present disclosure relates to a battery test system for a vehicle that includes a camera configured to capture an image of a vehicle identification number located on the vehicle, the camera being coupled to a processor which determines characters of the vehicle identification number from the image of the camera and correlates the characters of the vehicle identification number to a vehicle identification number database to receive battery parameters for the vehicle, a battery tester that is removably connected to terminals of a battery of the vehicle and configured to receive battery test results, and a display which conveys information relating to the battery parameters and the battery test results.

A system and method for monitoring characteristics of an electric energy device includes generating an external short from the electric energy device. The external short occurs at a known distance from a sensor and has at least one known external resistance. The received signal representing change in electromagnetic field due to the applied external short may be analyzed to determine a signal parameter that is then analyzed in comparison to a lookup table, based on the known conditions including distance, temperature and the external resistance. The output of this analyses in comparison with expected values may be utilized to identify a characteristic of the energy device.

A battery voltage measurement circuit includes: a first switch configured to be connected to a positive electrode of a battery; a second switch configured to be connected to a negative electrode of the battery; detection resistances that are connected in series between the first switch and the second switch; capacitors that are connected in parallel to the detection resistances; and a measurement circuit that measures a voltage applied to the detection resistances. The battery voltage measurement circuit has a plurality of measurement modes depending upon status of the first and second switches, and further has a failure detection mode for the capacitors based on a change in the voltage after switching from one to an other of the measurement modes.

A battery voltage measurement circuit includes: a first switch configured to be connected to a positive electrode of a battery; a second switch configured to be connected to a negative electrode of the battery; detection resistances that are connected in series between the first switch and the second switch; capacitors that are connected in parallel to the detection resistances; and a measurement circuit that measures a voltage applied to the detection resistances. The battery voltage measurement circuit has a plurality of measurement modes depending upon status of the first and second switches, and further has a failure detection mode for the capacitors based on a change in the voltage after switching from one to an other of the measurement modes.

A diagnostic device for a secondary battery which is an all-solid-state battery containing a solid electrolyte transporting lithium ions, in which the diagnostic device includes: an interruption means configured to interrupt a charging current or a discharging current of the secondary battery connected to a circuit; a measuring means configured to measure over time a variation characteristic of a terminal voltage of the secondary battery after the current is interrupted by the interruption means; and a diagnostic means configured to diagnose the cause of the degradation of the secondary battery by comparing a change rate or a change amount in voltage between a charging characteristic specified from measured values of a terminal voltage of the secondary battery measured by the measuring means, a charging/discharging characteristic specified from the measured values of the terminal voltage measured by the measuring means, and a reference characteristic of the secondary battery.

A diagnostic device for a secondary battery which is an all-solid-state battery containing a solid electrolyte transporting lithium ions, in which the diagnostic device includes: an interruption means configured to interrupt a charging current or a discharging current of the secondary battery connected to a circuit; a measuring means configured to measure over time a variation characteristic of a terminal voltage of the secondary battery after the current is interrupted by the interruption means; and a diagnostic means configured to diagnose the cause of the degradation of the secondary battery by comparing a change rate or a change amount in voltage between a charging characteristic specified from measured values of a terminal voltage of the secondary battery measured by the measuring means, a charging/discharging characteristic specified from the measured values of the terminal voltage measured by the measuring means, and a reference characteristic of the secondary battery.

One or more systems, devices, and/or system-implemented methods are provided that can facilitate provision of varying AC output voltage or DC output voltage, including selectively separately providing a positive voltage output, a negative voltage output and no voltage output. A device can comprise a battery cell, and a controller connected to the battery cell and that varies output from the battery cell, wherein the controller is configured to cause the battery cell to selectively separately provide negative output voltage, positive output voltage and no output voltage. A method can comprise varying output polarity from a multi-cell battery cluster and selectively providing one or both of alternating current (AC) voltage output or direct current (DC) voltage output from the multi-cell battery cluster due to the varying of the output polarity.