US5406266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Residual capacity displaying device
Assignee: Sanyo Electric Co Ltd
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Filing: 1994-07-01
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Granted: 1995-04-11
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Expires: 2014-07-01
Abstract
Abstract A residual capacity displaying device which discriminates whether or not a battery is deteriorated, and display the result of the discrimination. The residual capacity displaying device for a battery pack includes a current detecting unit for detecting current flowing to and from a battery pack. A battery identifying unit identifies the kind of the battery pack, and an arithmetic unit calculates the capacity of the battery pack according to the output of the current detecting unit and the time thereof. The dischargeable capacity of the battery pack is stored according to the output of the battery identifying unit. Also, the capacity of the battery pack which is discharged is compared until the voltage of the battery pack reaches a predetermined voltage value with the dischargeable capacity. When the result of comparison reaches a predetermined value, LEDs display the fact that the battery pack has been deteriorated.
Inventors
- 👤 Takayuki Mino
- 👤 Eiji Satsuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:08
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16533; G01R19/16538; G01R19/16542; G01R31/00; G01R31/36; G01R31/3644; G01R31/3648; G01R31/385; G01R31/387; G01R31/388; G01R31/378; G01R31/392; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/21
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
A display apparatus for indicating deterioration of a battery, comprising: current detection means for detecting a current flowing to and from the battery; deterioration detection means for detecting a deterioration of the battery including: storing means for storing a predetermined capacity of the battery; determining means for determining a recharged capacity of the battery from the current flowing over a period of time; voltage detection means for detecting a voltage of the battery being less than a predetermined voltage; calculation means for calculating a difference between the predetermined capacity and the recharged capacity of the battery in response to the voltage detection means; and judging means for judging whether a difference between the predetermined capacity and the recharged capacity of the battery exceeds a predetermined value; and display means for displaying a first notification when the difference exceeds the predetermined value, indicating battery deterioration, and a second notification, indicating that the battery should be recharged, when the difference does not exceed the predetermined value.
Claim 2
Dependent Claim
164 words
A display apparatus for indicating deterioration of a battery, comprising: current detection means for detecting a current flowing to and from the battery; deterioration detection means for detecting a deterioration of the battery including: storing means for storing a predetermined capacity of the battery; determining means for determining a recharged capacity of the battery from the current flowing over a period of time; voltage detection means for detecting a voltage of the battery being less than a predetermined voltage; calculation means for calculating a difference between the predetermined capacity and the recharged capacity of the battery in response to the voltage detection means; and judging means for judging whether a difference between the predetermined capacity and the recharged capacity of the battery exceeds a predetermined value; and display means for displaying a first notification when the difference exceeds the predetermined value, indicating battery deterioration, and a second notification, indicating that the battery should be recharged, when the difference does not exceed the predetermined value.
Claim 3
Dependent Claim
38 words
A deterioration display apparatus according to claim 1, further comprising means for determining battery type, and wherein the storing means stores the predetermined capacity in accordance with the battery type determined by the means for determining battery type.
Claim 4
Independent Claim
113 words
A method for determining deterioration of a battery having a predetermined capacity comprising the steps of: detecting a voltage of the battery and a current flowing to and from the battery; determining a recharged capacity of the battery from the current flow over a unit of time; comparing, when the voltage is less than a predetermined lower voltage limit, the recharged capacity with the predetermined capacity of the battery; displaying a first notification when a difference between the predetermined capacity and the recharged capacity is greater than a predetermined value indicating battery deterioration and a second notification when the difference is less than the predetermined value indicating that the battery should be recharged.
Claim 5
Independent Claim
113 words
A method for determining deterioration of a battery having a predetermined capacity comprising the steps of: detecting a voltage of the battery and a current flowing to and from the battery; determining a recharged capacity of the battery from the current flow over a unit of time; comparing, when the voltage is less than a predetermined lower voltage limit, the recharged capacity with the predetermined capacity of the battery; displaying a first notification when a difference between the predetermined capacity and the recharged capacity is greater than a predetermined value indicating battery deterioration and a second notification when the difference is less than the predetermined value indicating that the battery should be recharged.
Claim 6
Dependent Claim
29 words
The method according to claim 3, wherein the step of displaying a first notification further includes the substep of causing a plurality of light emitting diodes (LEDs) to flicker.
Claim 7
Dependent Claim
14 words
The method of claim 3, which further includes the step of determining battery type.
References Cited (Backward Citations)
US4380726A
Cited
US4229688A
Cited
US4544910A
Cited
US4678998A
Cited
JPS61209371A
Cited
JPS62141934A
Cited
JPS62175680A
Cited
US4743831A
Cited
US5043651A
Cited
US5032825A
Cited
US5325041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-10 | 1998-10-10 | 1999-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-10 | 2002-10-10 | 2003-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-10 | 2006-10-10 | 2007-04-11 | $7700.00 | Window Closed / Lapsed |