Inspection apparatus of electrical storage device
AssigneeToyota Jidosha Kabushikt Kaisha
InventorsKiwamu Kobayashi, Takeshi Goto
Life of this patent
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Abstract
An inspection apparatus including the power supply device, positive and negative conductive lines, connected to the power supply device and having corresponding first and second probes, at corresponding front ends, a resistor and a switch serially disposed between the positive conductive line and the negative conductive line, a circuit resistance calculation unit that calculates a circuit resistance value based on a difference in voltage between when the switch is turned off and turned on, an inspection unit configured to inspect the electrical storage device, and a virtual resistance setting unit that increases the output voltage after the start of inspection.
Claims5
An inspection apparatus of an electrical storage device, comprising:
- a power supply device configured to function as an external power supply;
- a positive conductive line connected to a positive electrode terminal of the power supply device to constitute part of a circuit, the positive conductive line having a first probe provided at a front end of the positive conductive line to have a contact with the electrical storage device;
- a negative conductive line connected to a negative electrode terminal of the power supply device to constitute part of the circuit, the negative conductive line having a second probe provided at a front end of the negative conductive line to have a contact with the electrical storage device;
- a resistance path configured by serially connecting a resistor and a switch, the resistance path disposed between the positive conductive line and the negative conductive line;
- a circuit resistance calculation unit configured to calculate a circuit resistance value of the circuit based on a difference in voltage across the positive conductive line and the negative conductive line between when the switch is turned off and when the switch is turned on, in a state where the circuit is constituted by contacting the first probe and the second probe with the positive electrode terminal and negative electrode terminal of the electrical storage device to be examined, respectively;
- an inspection unit configured to inspect the electrical storage device while increasing an output voltage of the power supply device in a state where the circuit is constituted and the switch is turned off, so as to inspect an amount of a self-discharge electric current of the electrical storage device based on a converging state of an electric current of the circuit;
- and
- a virtual resistance setting unit configured to increase the output voltage of the power supply device after start of inspection within a range where a sum of a virtual resistance value and the circuit resistance value is greater than zero, the virtual resistance value being a negative value obtained by converting an increment of the electric current, related to an increased part of the output voltage of the power supply device when the inspection unit performs the inspection, into a decrement of resistance of the circuit.
Dependencies are inferred from the claim text.