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公开(公告)号：US11205910B2
公开(公告)日：2021-12-21
申请号：US16755920
申请日：2018-07-31
发明人： Wolfram Walter
摘要： The invention relates to a method for charging or discharging an energy store (2) with at least one cell block (20) consisting of multiple series-connected battery cells (3-7) by means of a series charging current (IO) flowing through all battery cells (3-7), wherein at least some of the battery cells (3-7) can have different capacitances (CN).
In order to permit a reliable and quick charging of energy stores, the invention proposes measuring the capacitances (CN) of the N battery cells of the cell block at regular time intervals, and determining a maximum charging current for each battery cell based on the measured capacitances and a predefined C-factor (ratio of the maximum charging current IN;max to the capacitance CN) for each battery cell. With these maximum charging currents, the battery cells are then simultaneously charged during a charging time t (t≤1/C) predefined by the C-factor. In addition, the battery cells with a maximum charging current that corresponds to the series charging current IO are only charged by the series charging current; the battery cells with a maximum charging current IN;max that is greater than the series charging current are simultaneously charged by the series charging current and by the auxiliary charging currents IN that can be removed from the cell block, for which IN=IN;max−IO; and the battery cells with a maximum charging current IN;max that is lower than the series charging current Io are charged by the series charging current, wherein, simultaneously, the currents Io−IN;max exceeding the maximum charging currents IN;max are supplied to the cell block as discharging currents.-
公开(公告)号：US20200343736A1
公开(公告)日：2020-10-29
申请号：US16755920
申请日：2018-07-31
发明人： Wolfram WALTER
摘要： The invention relates to a method for charging or discharging an energy store (2) with at least one cell block (20) consisting of multiple series-connected battery cells (3-7) by means of a series charging current (IO) flowing through all battery cells (3-7), wherein at least some of the battery cells (3-7) can have different capacitances (CN).In order to permit a reliable and quick charging of energy stores, the invention proposes measuring the capacitances (CN) of the N battery cells of the cell block at regular time intervals, and determining a maximum charging current for each battery cell based on the measured capacitances and a predefined C-factor (ratio of the maximum charging current IN;max to the capacitance CN) for each battery cell. With these maximum charging currents, the battery cells are then simultaneously charged during a charging time t (t≤1/C) predefined by the C-factor. In addition, the battery cells with a maximum charging current that corresponds to the series charging current IO are only charged by the series charging current; the battery cells with a maximum charging current IN;max that is greater than the series charging current are simultaneously charged by the series charging current and by the auxiliary charging currents IN that can be removed from the cell block, for which IN=IN;max−IO; and the battery cells with a maximum charging current IN;max that is lower than the series charging current Io are charged by the series charging current, wherein, simultaneously, the currents Io−IN;max exceeding the maximum charging currents IN;max are supplied to the cell block as discharging currents.
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公开(公告)号：US20220384863A1
公开(公告)日：2022-12-01
申请号：US17770104
申请日：2020-10-28
发明人： Wolfram WALTER
摘要： A method for charging and/or discharging an energy store with a current I0, wherein the energy store has at least one cell block having a number J of series-connected battery cells, at least some of the battery cells of which may have different efficiencies ηN, where 1≤N≤J, has the following method steps: determining the battery cell having the lowest efficiency ηmin, and adjusting the efficiency ηN of all the other battery cells to this lowest efficiency ηmin such that the adjusted efficiency ηN′ of the battery cells is nN′=ηmin.
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4.发明公开公开(公告)号：US20240295605A1
公开(公告)日：2024-09-05
申请号：US17768468
申请日：2020-10-14
发明人： Wolfgang Bessler
IPC分类号： G01R31/367 , G01R31/374 , G01R31/3835 , G01R31/392
CPC分类号： G01R31/367 , G01R31/374 , G01R31/3835 , G01R31/392
摘要： The invention relates to a method and a device for determining the state of charge (SOC) of a rechargeable battery (106) of a specified battery type, or a parameter physically related thereto, in particular a remaining charge amount Q contained in the battery, wherein the method operates by means of a voltage-controlled battery model (102), which is parameterized for the battery (106) in question or a corresponding battery type. It is merely necessary to measure the battery voltage Umeas and to provide it to the battery model (102) as an input variable. The invention further relates to a method and a device for determining the state of health (SOH) of a battery (102), wherein the battery model (102), which is also used to determine the SOC, provides a modelled battery current Imod. Modelled charge amounts during charging and discharging phases of the battery (106) can be determined therefrom and compared with measured charge amounts, which are determined from the measured battery current Imeas. Because the battery model (102) does not age, the SOH of the battery can thereby be determined.
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