EP0368353A2
Expired / Lapsed
EP
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Battery charging apparatus
Assignee: Sanyo Electric Co Ltd
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Filing: 1989-11-10
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Granted: —
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Expires: 2009-11-10
Abstract
Abstract A battery charging apparatus includes a charger (12) to which a battery (16) to be charged is loaded and a charge controller (10) which controls a charge in the charger. A terminal voltage of the battery loaded in the charger is sampled and A/D converted by a microcomputer (26) of the charge controller at time intervals. At every timing when a new sampled value is stored in a memory, the new sampled value is compared with a maximum sampled value which has been stored in the memory before that time. When the new sampled value is smaller than the maximum sampled value by a predetermined value (Δ V), a full-charge signal is outputted. In addition, when a state where the new sampled value is larger than the maximum sampled value continues for a predetermined time period or more, the maximum sampled value is updated.
Inventors
- 👤 Kazuhiro Tsujino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/96; H02J7/963
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A battery charging apparatus, comprising: sampling means for sampling a terminal voltage of a battery being charged at time intervals; storing means for storing a maximum sampled value; outputting means for outputting a full-charge signal when a new sampled value is smaller than the maximum sampled value by a predetermined value or more; and updating means for updating the maximum sampled value of said storing means when a state where said new sampled value is larger than said maximum sampled value continues for a predetermined time or more.
Claim 2
Dependent Claim
88 words
A battery charging apparatus, comprising: sampling means for sampling a terminal voltage of a battery being charged at time intervals; storing means for storing a maximum sampled value; outputting means for outputting a full-charge signal when a new sampled value is smaller than the maximum sampled value by a predetermined value or more; and updating means for updating the maximum sampled value of said storing means when a state where said new sampled value is larger than said maximum sampled value continues for a predetermined time or more.
Claim 3
Dependent Claim
53 words
A battery charging apparatus in accordance with claim 1, wherein said updating means includes means for updating said maximum sampled value when a state where said new sampled value is larger than said maximum sampled value but a difference therebetween is less than a predetermined value continues for a first time or more.
Claim 4
Dependent Claim
55 words
A battery charging apparatus in accordance with claim 1 or 2, wherein said updating means includes means for updating said maximum sampled value when a state where said new sampled value is larger than said maximum sampled value and a difference therebetween is more than a predetermined value continues for a second time or more.
Claim 5
Dependent Claim
22 words
A battery charging apparatus in accordance with claim 3, wherein said first time is set to be shorter than said second time.
Claim 6
Dependent Claim
72 words
A battery charging apparatus in accordance with any one of claims 1 through 4, further comprising detecting means for detecting that the terminal voltage of the battery being charged continuously decreases for a predetermined time or more, wherein said outputting means outputs the full-charge signal in response to a detection of said detecting means when said new sampled value is smaller than said maximum sampled value by a predetermined value or more.
Claim 7
Dependent Claim
124 words
A battery charging apparatus, comprising: sampling means for sampling a terminal voltage of a battery being charged at time intervals; storing means for storing a maximum sampled value; comparing means for comparing a new sampled value with said maximum sampled value of said storing means; updating means for updating said maximum sampled value when said new sampled value is larger than said maximum sampled value; detecting means for detecting based upon sampled values by said sampling means that said terminal voltage continuously decreases for a predetermined time or more; and outputting means for outputting a full-charge signal in response to a detection of said detecting means when said new sampled value is smaller than said maximum sampled value by a predetermined value or more.
Claim 8
Dependent Claim
124 words
A battery charging apparatus, comprising: sampling means for sampling a terminal voltage of a battery being charged at time intervals; storing means for storing a maximum sampled value; comparing means for comparing a new sampled value with said maximum sampled value of said storing means; updating means for updating said maximum sampled value when said new sampled value is larger than said maximum sampled value; detecting means for detecting based upon sampled values by said sampling means that said terminal voltage continuously decreases for a predetermined time or more; and outputting means for outputting a full-charge signal in response to a detection of said detecting means when said new sampled value is smaller than said maximum sampled value by a predetermined value or more.
References Cited (Backward Citations)
No citation records indexed.
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