Method and device for carrying out a process for charging an appliance battery
A method for carrying out a process for charging an appliance battery of an appliance, with the following steps: providing a charging profile that specifies a maximally permissible charging current for charging the appliance battery in a manner depending on a state of charge of the appliance battery; ascertaining a current state of health of the appliance battery; providing a reference state of health that predetermines a customary state of health for a calendrical age of the appliance battery; charging the appliance battery in a manner depending on a corrected maximally permissible charging current, the corrected maximally permissible charging current being ascertained by applying a correction value to the maximally permissible charging current, the correction value being determined in a manner depending on a correction function, depending on a difference between the reference state of health and the current state of health.
1 . A method for charging an appliance battery ( 41 ) of an appliance, the method comprising the following steps:
providing a charging profile that specifies a maximally permissible charging current for charging the appliance battery ( 41 ) depending on a state of charge of the appliance battery;
ascertaining (S 2 ) a current state of health (SOHakt) of the appliance battery ( 41 );
providing (S 3 ) a reference state of health that predetermines a customary state of health for a calendrical age of the appliance battery ( 41 ); and
charging (S 6 ) the appliance battery ( 41 ) in a manner depending on a corrected maximally permissible charging current, the corrected maximally permissible charging current being ascertained (S 4 ) by applying a correction value (K) to the maximally permissible charging current, the correction value (K) being determined in a manner depending on a correction function, depending on a difference between the reference state of health (SOHref) and the current state of health (SOHakt),
wherein the correction value (K) takes the form of a correction factor for multiplicative application to the maximally permissible charging current, the correction function exhibiting a PT1 characteristic with respect to the difference between the reference state of health (SOHref) and the current state of health (SOHakt).
2 . The method according to claim 1 , wherein the reference state of health (SOHref) is determined as a mean/average state of health of a plurality of appliance batteries ( 41 ) of the same type with the same or comparable calendrical age.
3 . The method according to claim 2 , wherein the reference state of health (SOHref) is ascertained in a central unit ( 2 ) external to the appliance in a manner depending on operating-variable progressions of the plurality of appliance batteries ( 41 ) and is communicated to the appliance prior to the charging process.
4 . The method according to claim 1 , wherein the correction value (K) is determined in such a way that the maximally permissible charging current is reduced if the current state of health (SOHakt) indicates a greater aging with respect to the reference state of health (SOHref), and/or that the maximally permissible charging current is increased if the current state of health (SOHakt) indicates a slighter aging with respect to the reference state of health (SOHref).
5 . The method according to claim 1 , wherein the charging of the appliance battery ( 41 ) is carried out in accordance with a manual selection by a user in a manner depending either on the corrected maximally permissible charging current or on the maximally permissible charging current predetermined by the charging profile.
6 . A computer comprising an electronic processor configured to
provide a charging profile that specifies a maximally permissible charging current for charging an appliance battery ( 41 ) depending on a state of charge of the appliance battery;
ascertain (S 2 ) a current state of health (SOHakt) of the appliance battery ( 41 );
provide (S 3 ) a reference state of health that predetermines a customary state of health for a calendrical age of the appliance battery ( 41 ); and
control charging (S 6 ) of the appliance battery ( 41 ) in a manner depending on a corrected maximally permissible charging current, the corrected maximally permissible charging current being ascertained (S 4 ) by applying a correction value (K) to the maximally permissible charging current, the correction value (K) being determined in a manner depending on a correction function, depending on a difference between the reference state of health (SOHref) and the current state of health (SOHakt),
wherein the correction value (K) takes the form of a correction factor for multiplicative application to the maximally permissible charging current, the correction function exhibiting a PT1 characteristic with respect to the difference between the reference state of health (SOHref) and the current state of health (SOHakt).
7 . A non-transitory, computer-readable medium containing instructions which, when executed by at a computer, cause the computer to:
provide a charging profile that specifies a maximally permissible charging current for charging an appliance battery ( 41 ) depending on a state of charge of the appliance battery;
ascertain (S 2 ) a current state of health (SOHakt) of the appliance battery ( 41 );
provide (S 3 ) a reference state of health that predetermines a customary state of health for a calendrical age of the appliance battery ( 41 ); and
control charging (S 6 ) of the appliance battery ( 41 ) in a manner depending on a corrected maximally permissible charging current, the corrected maximally permissible charging current being ascertained (S 4 ) by applying a correction value (K) to the maximally permissible charging current, the correction value (K) being determined in a manner depending on a correction function, depending on a difference between the reference state of health (SOHref) and the current state of health (SOHakt),
wherein the correction value (K) takes the form of a correction factor for multiplicative application to the maximally permissible charging current, the correction function exhibiting a PT1 characteristic with respect to the difference between the reference state of health (SOHref) and the current state of health (SOHakt).