Battery pack and inspection device therefor

An inspection device for a battery pack which includes a rechargeable battery, a positive electrode input/output terminal connected with a positive electrode of the rechargeable battery, a negative electrode input/output terminal connected with a negative electrode of the rechargeable battery, switching elements serially connected with an input/output circuit extending from said rechargeable battery to said positive electrode input/output terminal and said negative electrode input/output terminal, a control circuit for monitoring a voltage between the positive and negative electrodes of said rechargeable battery, and setting said switching element to a cutoff state when an overcharge voltage in an overcharged state, or an overdischarge voltage in an overdischarged state is detected, and an inspection terminal for outward extending a positive electrode voltage input terminal of said control circuit used for receiving the positive electrode voltage of said rechargeable battery,

• the inspection device for detecting an overcharge protection operation or an overdischarge protection operation of said battery pack by an ammeter installed in a charging circuit or a discharging circuit while a charging power supply or a discharging load is connected between said positive electrode input/output terminal and said negative electrode input/output terminal of the battery pack, and an inspection voltage corresponding to said overcharge voltage or said overdischarge voltage is impressed on said control circuit, wherein
• the inspection device is provided with an inspection circuit for generating said inspection voltage from a voltage between said positive electrode input/output terminal and said negative electrode input/output terminal, and impressing said inspection voltage between said inspection terminal and said negative electrode input/output terminal.

An inspection device for a battery pack which includes a rechargeable battery, a positive electrode input/output terminal connected with a positive electrode of the rechargeable battery, a negative electrode input/output terminal connected with a negative electrode of the rechargeable battery, switching elements serially connected with an input/output circuit extending from said rechargeable battery to said positive electrode input/output terminal and said negative electrode input/output terminal, a control circuit for monitoring a voltage between the positive and negative electrodes of said rechargeable battery, and setting said switching element to a cutoff state when an overcharge voltage in an overcharged state, or an overdischarge voltage in an overdischarged state is detected, and an inspection terminal for outward extending a positive electrode voltage input terminal of said control circuit used for receiving the positive electrode voltage of said rechargeable battery,

• the inspection device for detecting an overcharge protection operation or an overdischarge protection operation of said battery pack by an ammeter installed in a charging circuit or a discharging circuit while a charging power supply or a discharging load is connected between said positive electrode input/output terminal and said negative electrode input/output terminal of the battery pack, and an inspection voltage corresponding to said overcharge voltage or said overdischarge voltage is impressed on said control circuit, wherein
• the inspection device is provided with a battery voltage memory circuit for storing the voltage of said rechargeable battery, a DC voltage power supply for generating voltages for inspecting the overcharge protection operation and the overdischarge protection operation, and an inspection voltage generation circuit for generating said inspection voltage from a voltage difference between an output voltage of said battery voltage memory circuit, and an output voltage of said DC voltage power supply and a voltage between said positive electrode input/output terminal and said negative electrode input/output terminal, and impressing said inspection voltage between said inspection terminal and said negative electrode input/output terminal.

An inspection device for a battery pack which includes a rechargeable battery, a positive electrode input/output terminal connected with a positive electrode of the rechargeable battery, a negative electrode input/output terminal connected with a negative electrode of the rechargeable battery, a switching element serially connected with an input/output circuit extending from said rechargeable battery to said positive electrode input/output terminal and said negative electrode input/output terminal, a control circuit for monitoring a voltage between the positive and negative electrodes of said rechargeable battery, and setting said switching element to a cutoff state when an overcharge voltage in an overcharged state is detected, and an inspection terminal for outward extending a positive electrode voltage input/output terminal of said control circuit used for receiving the positive electrode voltage of said rechargeable battery,

• the inspection device for detecting an overcharge protection operation of said battery pack by an ammeter installed in a charging circuit while a charging power supply is connected between said positive electrode input/output terminal and said negative electrode input/output terminal of the battery pack, and an inspection voltage corresponding to said overcharge voltage is impressed on said control circuit, wherein
• said charging power supply supplies a charging power having a voltage corresponding to said overcharge voltage, and the output voltage of said charging power supply is impressed between said inspection terminal and said negative electrode input/output terminal in a charging state where charging voltage generation means drops the output voltage from the charging power supply to a normal charging voltage, and the charging voltage is impressed between said positive electrode input/output terminal and said negative electrode input/output terminal.