| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a state-of-charge controller of battery in which fuel consumption reduction effect can be ensured through regenerative power generation by controlling the state of charge (SOC) of a battery to an always chargeable state. <P>SOLUTION: Battery voltage C at a discharge start point after regenerative power generation is compared with upper and lower limit values D1 and D2 of a predetermined threshold range and a threshold D3 for judging overdischarge (S2-S4). If C>D1, the state of charge (SOC) of a battery is estimated to be large and the state of discharge is increased more than the state of charge obtained by regenerative power generation (S5). If D2>C>D3, the state of charge (SOC) of a battery is estimated to be small and the state of discharge is made fewer than the state of charge obtained by regenerative power generation (S6). If C<D3, transition is made to charge mode by estimating overdischarge state and forced charging is performed (S11). Regenerative control is forbidden if overdischarge state is judged even after repeating forced charging (S12). <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
