Battery system
First Claim
1. A battery system, comprising:
- a first battery electrically connected between a first node and a second node via a first module switch in a short circuit state;
a second battery electrically insulated from the first battery by a second module switch in an open circuit state; and
a battery manager to detect a first battery voltage of the first battery, a second battery voltage of the second battery, and a system current flowing between the first and second nodes, to determine an open circuit voltage of the first battery based on the first battery voltage and the system current, and to short-circuit the second module switch when the open circuit voltage is substantially equal to the second battery voltage so that the second battery is connected to the first battery in parallel.
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Abstract
A battery system includes a first battery, a second battery, and a battery manager. The first battery is electrically connected between a first node and a second node via a first module switch in a short circuit state. The second battery is electrically insulated from the first battery by a second module switch in an open circuit state. The battery manager detects a first battery voltage of the first battery, a second battery voltage of the second battery, and a system current flowing between the first and second nodes, determines an open circuit voltage of the first battery based on the first battery voltage and the system current, and short-circuits the second module switch when the open circuit voltage is substantially equal to the second battery voltage so that the at least one second battery is connected to the at least one first battery in parallel.
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Citations
17 Claims
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1. A battery system, comprising:
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a first battery electrically connected between a first node and a second node via a first module switch in a short circuit state; a second battery electrically insulated from the first battery by a second module switch in an open circuit state; and a battery manager to detect a first battery voltage of the first battery, a second battery voltage of the second battery, and a system current flowing between the first and second nodes, to determine an open circuit voltage of the first battery based on the first battery voltage and the system current, and to short-circuit the second module switch when the open circuit voltage is substantially equal to the second battery voltage so that the second battery is connected to the first battery in parallel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A battery system, comprising:
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a plurality of battery modules selectively connected to one another in parallel; and a system manager to manage the battery modules, wherein each of the battery modules includes; a module switch serially connected to a battery between a pair of module terminals, and a module manager to detect a battery voltage and a battery current of the battery, to transmit information corresponding to the battery voltage and the battery current to the system manager, and to switch the module switch under control of the system manager, and wherein the system manager is to determine a timing to short-circuit a module switch of at least one remaining second battery module from among the battery modules based on the battery voltage and the battery current of each of the battery modules, while at least one first battery module from among the battery modules is being charged or discharged. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus, comprising:
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a detector to detect a first battery voltage of a first battery, a second battery voltage of a second battery, and current flowing between first and second nodes, the first battery connected between a first node and a second node when a first module switch is in a short circuit state, the second battery electrically insulated from the first battery when a second module switch is in an open circuit state; and a battery manager to determine an open circuit voltage of the first battery based on the first battery voltage and the current and to short-circuit the second module switch when the open circuit voltage is substantially equal to the second battery voltage to connect the second battery to the first battery in parallel. - View Dependent Claims (14, 15, 16, 17)
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Specification