BATTERY PACK, AND BATTERY SYSTEM
First Claim
1. A battery pack, comprising:
- first and second assembled batteries as assembled batteries in which a plurality of secondary batteries are connected in series;
a charge terminal for receiving a charging current for charging the first and second assembled batteries;
a discharge terminal for supplying a discharging current output from the first and second assembled batteries to a load;
a first charge switch unit for opening/closing a first charging path extending from the charge terminal to the first assembled battery;
a first discharging path switch unit for opening/closing a first discharging path extending from the first assembled battery to the discharge terminal;
a second charge switch unit for opening/closing a second charging path extending from the charge terminal to the second assembled battery;
a second discharging path switch unit for opening/closing a second discharging path extending from the second assembled battery to the discharge terminal; and
a control unit for executing, upon charging the first assembled battery, first charge processing of turning OFF the first discharging path switch unit and the second charge switch unit and turning ON the first charge switch unit until all secondary batteries contained in the first assembled battery are fully charged, and executing, upon charging the second assembled battery, second charge processing of turning OFF the second discharging path switch unit and the first charge switch unit and turning ON the second charge switch unit until all secondary batteries contained in the second assembled battery are fully charged.
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Accused Products
Abstract
An object of the present invention is to provide a battery pack and a battery system capable of reducing unnecessary power loss upon reducing the variation in the state of charge that has occurred between a plurality of secondary batteries in an assembled battery in which the secondary batteries are connected in series-parallel. The battery pack and the battery system include a switching element Q11 for opening/closing the charging path of a battery pack B1, a switching element Q12 for opening/closing the discharging path of the battery pack B1, a switching element Q21 for opening/closing the charging path of a battery pack B2, and a switching element Q22 for opening/closing the discharging path of the battery pack B2. When the battery pack B1 is charged, the switching elements Q12, Q21 are turned OFF and the switching element Q11 is turned ON until the secondary batteries B11, B12 are fully charged. When the battery pack B2 is charged, the switching elements Q22, Q11 are turned OFF and the switching element Q21 is turned ON until the secondary batteries B21, B22 are fully charged.
33 Citations
11 Claims
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1. A battery pack, comprising:
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first and second assembled batteries as assembled batteries in which a plurality of secondary batteries are connected in series; a charge terminal for receiving a charging current for charging the first and second assembled batteries; a discharge terminal for supplying a discharging current output from the first and second assembled batteries to a load; a first charge switch unit for opening/closing a first charging path extending from the charge terminal to the first assembled battery; a first discharging path switch unit for opening/closing a first discharging path extending from the first assembled battery to the discharge terminal; a second charge switch unit for opening/closing a second charging path extending from the charge terminal to the second assembled battery; a second discharging path switch unit for opening/closing a second discharging path extending from the second assembled battery to the discharge terminal; and a control unit for executing, upon charging the first assembled battery, first charge processing of turning OFF the first discharging path switch unit and the second charge switch unit and turning ON the first charge switch unit until all secondary batteries contained in the first assembled battery are fully charged, and executing, upon charging the second assembled battery, second charge processing of turning OFF the second discharging path switch unit and the first charge switch unit and turning ON the second charge switch unit until all secondary batteries contained in the second assembled battery are fully charged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A battery system, comprising:
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first and second assembled batteries as assembled batteries in which a plurality of secondary batteries are connected in series; a charge terminal for receiving a charging current for charging the first and second assembled batteries; a charging current supply unit for supplying the charging current to the charge terminal; a discharge terminal for supplying a discharging current output from the first and second assembled batteries to a load; a first charge switch unit for opening/closing a first charging path extending from the charge terminal to the first assembled battery; a first discharging path switch unit for opening/closing a first discharging path extending from the first assembled battery to the discharge terminal; a second charge switch unit for opening/closing a second charging path extending from the charge terminal to the second assembled battery; a second discharging path switch unit for opening/closing a second discharging path extending from the second assembled battery to the discharge terminal; and a control unit for executing, upon charging the first assembled battery, first charge processing of turning OFF the first discharging path switch unit and the second charge switch unit and turning ON the first charge switch unit until all secondary batteries contained in the first assembled battery are fully charged, and executing, upon charging the second assembled battery, second charge processing of turning OFF the second discharging path switch unit and the first charge switch unit and turning ON the second charge switch unit until all secondary batteries contained in the second assembled battery are fully charged.
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Specification