Central control unit for controlling the charging process of a battery
First Claim
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1. A control unit for controlling the charging process of a battery, comprising:
- (a) a charger circuit coupled to the battery;
(b) a circuit for prohibiting said charging process when at least the following conditions recited in paragraphs (i) and (ii) below are both met;
(i) TB>
Tmax, where TB designates the actual temperature of the battery and Tmax designates the highest permissible battery temperature, and (ii) in addition to the condition of paragraph (i) above being met, at least one of the following three conditions of paragraph I, II or III are met;
(I) if the battery voltage UB lies below a predetermined threshold value Uo (II) if the charging current Ich exceeds a predetermined maximum value Imax, or (III) an end-of-charge condition, wherein said end-of-charge condition is generated when a change in either the battery current or voltage, dI or dU, respectively, decreases within a predetermined time period below a respective predetermined threshold level;
said prohibiting circuit comprising respective conditional and final prohibition circuits, wherein said final prohibition circuit is triggered by the following two of said conditions, namely, the battery voltage UB lies below a predetermined threshold value Uo and the charging current Ich exceeds a predetermined maximum value Imax;
said conditional prohibition circuit being triggered by any one of said prohibition conditions, said central control circuit further comprising a restart circuit for restarting a conditionally prohibited charging process, said restart circuit comprising a plurality of inputs through which respective restart signals can be received, said restart circuit being responsive to said restart signals to trigger restart of operation of said charger circuit in response to the temperature of the battery (TB) being lower than an acceptable predetermined temperature (Tok), said restart signals controlling control unit operations for the same respective parameters as those constituting said conditional prohibitions, actual trigger values of the restart condition being separated from trigger values associated with conditional prohibition parameters to define a hysteresis characteristic.
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Abstract
Central control unit for controlling the charging process of a battery that comprises:
- a charger circuit coupled to the battery;
- a circuit for conditionally prohibiting the charging process when predetermined conditions are met, the conditions comprise at least the condition of TB>Tmax, where TB designates the actual temperature of the battery and Tmax designates the highest permissible battery temperature, and the further condition when the change of one of the battery current and voltage dI and dU decreases in a predetermined time period below a predetermined threshold level; and
- a restart circuit for restarting the conditionally prohibited charging, comprising a plurality of inputs through which respective restart signals can be received, wherein a precondition of any restart is that the temperature of the battery TB being lower than an acceptable predetermined temperature Tok.
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Citations
9 Claims
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1. A control unit for controlling the charging process of a battery, comprising:
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(a) a charger circuit coupled to the battery;
(b) a circuit for prohibiting said charging process when at least the following conditions recited in paragraphs (i) and (ii) below are both met;
(i) TB>
Tmax, where TB designates the actual temperature of the battery and Tmax designates the highest permissible battery temperature, and(ii) in addition to the condition of paragraph (i) above being met, at least one of the following three conditions of paragraph I, II or III are met;
(I) if the battery voltage UB lies below a predetermined threshold value Uo (II) if the charging current Ich exceeds a predetermined maximum value Imax, or (III) an end-of-charge condition, wherein said end-of-charge condition is generated when a change in either the battery current or voltage, dI or dU, respectively, decreases within a predetermined time period below a respective predetermined threshold level; said prohibiting circuit comprising respective conditional and final prohibition circuits, wherein said final prohibition circuit is triggered by the following two of said conditions, namely, the battery voltage UB lies below a predetermined threshold value Uo and the charging current Ich exceeds a predetermined maximum value Imax;
said conditional prohibition circuit being triggered by any one of said prohibition conditions, said central control circuit further comprising a restart circuit for restarting a conditionally prohibited charging process, said restart circuit comprising a plurality of inputs through which respective restart signals can be received, said restart circuit being responsive to said restart signals to trigger restart of operation of said charger circuit in response to the temperature of the battery (TB) being lower than an acceptable predetermined temperature (Tok), said restart signals controlling control unit operations for the same respective parameters as those constituting said conditional prohibitions, actual trigger values of the restart condition being separated from trigger values associated with conditional prohibition parameters to define a hysteresis characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A Central control unit for controlling the charging process of a battery, comprising:
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(a) a charger circuit coupled to the battery;
(b) a circuit for prohibiting said charging process when at least the following conditions recited in paragraphs (i) and (ii) below are both met;
(i) TB>
Tmax, where TB designates the actual temperature of the battery and Tmax designates the highest permissible battery temperature, and(ii) in addition to the condition of paragraph (i) above being met, at least one of the following three conditions of paragraph I, II or III are met;
(I) if the battery voltage UB lies below a predetermined threshold value Uo (II) if the charging current Ich exceeds a predetermined maximum value Imax, or (III) an end-of-charge condition, wherein said end-of-charge condition is generated when a change in either the battery current or voltage, dI or dU, respectively, decreases within a predetermined time period below a respective predetermined threshold level.
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Specification