Energy transfer circuit, and electricity storage system
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorMASAAKI KURANUKI
Life of this patent
Estimating the term…
Abstract
Cell selection circuit is provided between n cells connected in series, where n is an integer of 2 or more, and inductor, and is provided at both ends of the selected cell and both ends of inductor can be conductive. Clamp circuit includes at least one clamp switch for forming a closed loop including inductor in a state where cell selection circuit does not select any cells. Current detection circuit detects the value of the current flowing through inductor. Low-pass filter band-limits the detection value. Overcurrent detection circuit activates the protection of inductor when the band-limited detection value exceeds the threshold.
Claims14
An energy transfer circuit comprising:
- an inductor;
- a cell selection circuit provided between the inductor and n cells connected in series, where n is an integer of 2 or more, the cell selection circuit being configured to conduct between (i) both ends of a selected cell and (ii) both ends of the inductor, the selected cell being a least one cell selected from the n cells connected in series;
- a clamp circuit including at least one clamp switch, the at least one clamp switch forming a closed loop including the inductor in a state where the cell selection circuit does not select any cells;
- a current detection circuit configured to detect a value of a current flowing through the inductor;
- a low-pass filter configured to band-limit a detection value detected by the current detection circuit;
- and
- an overcurrent detection circuit configured to activate protection of the inductor when the detection value band-limited by the low-pass filter exceeds a threshold.
An energy transfer circuit comprising:
- an inductor;
- a module selection circuit provided between m modules connected in series, where m is an integer of 2 or more, and the inductor and configured to conduct both ends of a selected module including any one of the m modules or a plurality of modules connected in series, and both ends of the inductor;
- a clamp circuit including a clamp switch for forming a closed loop including the inductor in a state where the module selection circuit not selecting any modules;
- a current detection circuit configured to detect a value of a current flowing through the inductor;
- a low-pass filter configured to band-limit a detection value detected by the current detection circuit;
- and
- an overcurrent detection circuit configured to activate protection of the inductor when a detection value band-limited by the low-pass filter exceeds a threshold.
Dependencies are inferred from the claim text.