Power supply device and battery pack
OwnerTakuma Iida, Tadao Kimurainventors
Life of this patent
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Abstract
A temperature detection portion 41 captures temperature detection values detected by a plurality of temperature sensors T disposed at prescribed positions of a battery portion 2 with a prescribed period, to detect the state of the battery portion 2. An abnormality judgment portion 42 compares the temperature detection values detected by the temperature detection portion 41 with a threshold value determined in advance, to judge whether the state of the battery portion 2 is abnormal. In a case where the abnormality judgment portion 42 judges that the battery portion 2 is abnormal, a charge/discharge control portion 43 causes a switching element 5 to operate in an on/off sequence set in advance, and then turns off the switching element 5.
Claims7
A power supply device, comprising a plurality of battery packs connected in series, wherein each battery pack includes:
- a battery portion, including one or a plurality of secondary batteries;
- a connection terminal which receives current flowing in the battery portion;
- a switching element which opens and closes a charge/discharge path between the battery portion and the connection terminal;
- a state detection portion which detects a state of the battery portion;
- an abnormality judgment portion which judges whether the state of the battery portion is abnormal, based on the state of the battery portion detected by the state detection portion;
- a charge/discharge control portion which, when the state of the battery portion is judged to be abnormal by the abnormality judgment portion, causes the switching element to operate in an on/off sequence set in advance, and then turns off the switching element;
- and
- a first current detection portion which detects a current flowing in the battery portion, and
- wherein, when the current detected by the first current detection portion has changed in a current change pattern corresponding to the on/off sequence, the abnormality judgment portion judges that another battery pack is abnormal, and turns off the switching element.
A battery pack, comprising:
- a battery portion, including one or a plurality of secondary batteries;
- a connection terminal which receives current flowing in the battery portion;
- a switching element which opens and closes a charge/discharge path between the battery portion and the connection terminal;
- a state detection portion which detects a state of the battery portion;
- an abnormality judgment portion which judges whether the state of the battery portion is abnormal, based on the state of the battery portion detected by the state detection portion;
- a charge/discharge control portion which, when the state of the battery portion is judged to be abnormal by the abnormality judgment portion, causes the switching element to operate in an on/off sequence set in advance, and then turns off the switching element;
- and
- a first current detection portion which detects a current flowing in the battery portion,
- wherein, when the current detected by the first current detection portion has changed in a current change pattern corresponding to the on/off sequence, the abnormality judgment portion judges that another battery pack connected in series is abnormal, and turns off the switching element.
Dependencies are inferred from the claim text.