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EP0584362A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for charging battery and apparatus therefor

Assignee: Individual
•
Filing: 1992-07-27
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Granted: —
•
Expires: 2012-07-27
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Abstract

Abstract A method and apparatus for charging quickly batteries such as a lead storage battery, in which an initial charging process (a) from time 0 to t₁, a quick charging process (b) from time T₁ to T₂, and a final charging process (c) from time t₂ to t₃ are executed by stepwise and continuously. In the initial charging process (a), charging current whose magnitude is increased gradually is made to flow. In the quick charging process (b), charging current of a greater quantity of charge than that in the initial charging process (a) is made to flow intermittently into a battery (6), while monitoring its voltage. In the final charging process (c), charging current being reduced gradually is made to flow into the battery (6) when the voltage reaches a charging end value. Thereby, charging in a very short time is possible, and more over the battery suffers no damage, and also, charging which permeates even the inside of electrode plates is possible.

Inventors

  • 👤 Kenkichi Mc Japan Co. Ltd. Shimomoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 02:34
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/94; H02J7/96

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 100 words
a battery charging method characterized by carrying out in step-wise and continuously, an initial charging process for applying the charging current whose volume of electricity is increased gradually to start charging of the battery, a quick charging process for applying the charging current having the larger volume of electricity than the initial charging process intermittently, as watching a terminal voltage of the battery, to charge the battery, and a final charging process for applying the charging current whose volume of electricity is reduced gradually to finish charging of the battery, when the battery terminal voltage has reached a charge-end voltage.
Claim 2
Dependent Claim 25 words
A battery charging method in accordance with claim 1, wherein a charging current is watched to judge a battery defect in an initial charging process.
Claim 3
Dependent Claim 57 words
A battery charging method in accordance with claim 1, wherein in a quick charging process, a continuous charging period during which the intermittent supply of charging current is continued, and a charging suspension period during which the intermittent supply of quick charging current is suspended, are repeated alternately till the battery terminal voltage reaches the charge-end voltage.
Claim 4
Dependent Claim 271 words
a battery charging apparatus comprising, a control switch (8) provided in a charging circuit, a charging current detector (11), a terminal voltage detector (12) of a battery (16) and a control unit (9) which controls the charging current in step-wise, by giving a control signal responsive to charging steps to the control switch (8) in response to detected results by the charging current detector (11) and the terminal voltage detector (12), wherein said control unit (9) comprising: first signal generating means for generating a control signal for applying an initial stage charging current whose volume of electricity is increased gradually ; second signal generating means for generating a control signal for applying a charging current, whose volume of electricity is larger than the initial stage charging current, intermittently; third signal generating means for generating a control signal for applying a final stage charging current whose volume of electricity is reduced gradually; first judging means for comparing the detected value by the charging current detector (11) with a reference value to judge defect of a battery (6). second judging means for comparing the detected value by the terminal voltage detector (12) with a charging end voltage to judge that the terminal voltage of a battery (6) has reached the charge-end voltage: first switching means for shifting the operation from the first signal generating means to the second signal generating means in response to the judging operation by the first judging means; and second switching means for shifting the operation from the second signal generating means to the third signal generating means in response to the judging operation of the second judging means.
Claim 5
Dependent Claim 62 words
A battery charging apparatus in accordance with claim 4, wherein the control unit (9) includes period setting means for alternately setting a continuous charging period during which the intermittent supply of charging current is continued, and a charging suspension period during which the intermittent supply of charging current is suspended, till the terminal voltage of a battery (6) reaches the charge-end voltage.

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