BATTERY MONITOR CIRCUIT, STORAGE APPARATUS, ELECTRONIC APPARATUS, ELECTRIC-POWERED VEHICLE, AND POWER SYSTEM
First Claim
1. A battery monitor circuit comprising:
- a first monitoring unit configured to detect voltages of battery cells included in a first group;
a second monitoring unit configured to detect voltages of battery cells included in a second group; and
a current cancellation unit configured to cancel a differential current that is a difference between a first current flowing through the first monitoring unit and a second current flowing through the second monitoring unit, andwherein the battery cells included in the first group and the battery cells included in the second group form a series connection,wherein one terminal of the series connection and one power terminal of the first monitoring unit are connected, the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit are connected, and the other power terminal of the second monitoring unit and the other terminal of the series connection are connected, andwherein the current cancellation unit is disposed between a connection point between the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit and a middle connection point in the middle of the series connection.
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Accused Products
Abstract
A battery monitor circuit includes a first monitoring unit for detecting voltages of battery cells in a first group, a second monitoring unit for detecting voltages of battery cells in a second group, and a current cancellation unit for canceling a difference between first and second currents that flow through the first and second monitoring units, respectively. One terminal of a series connection of the battery cells in the first and second groups and one terminal of the first monitoring unit are connected, the other terminal of the first monitoring unit and one terminal of the second monitoring unit are connected, and the other terminal of the second monitoring unit and the other terminal of the series connection are connected. The current cancellation unit is disposed between a connection point between the first and second monitoring units and a middle connection point in the middle of the series connection.
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Citations
10 Claims
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1. A battery monitor circuit comprising:
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a first monitoring unit configured to detect voltages of battery cells included in a first group; a second monitoring unit configured to detect voltages of battery cells included in a second group; and a current cancellation unit configured to cancel a differential current that is a difference between a first current flowing through the first monitoring unit and a second current flowing through the second monitoring unit, and wherein the battery cells included in the first group and the battery cells included in the second group form a series connection, wherein one terminal of the series connection and one power terminal of the first monitoring unit are connected, the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit are connected, and the other power terminal of the second monitoring unit and the other terminal of the series connection are connected, and wherein the current cancellation unit is disposed between a connection point between the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit and a middle connection point in the middle of the series connection. - View Dependent Claims (2, 3, 4)
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5. A storage apparatus comprising:
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a series connection of a plurality of battery cells; and a battery monitor circuit configured to detect voltages of the plurality of battery cells, and wherein the plurality of battery cells in the series connection are classified into at least two groups, a first group and a second group, wherein the battery monitor circuit includes, a first monitoring unit configured to detect voltages of battery cells included in the first group, a second monitoring unit configured to detect voltages of battery cells included in the second group, and a current cancellation unit configured to cancel a differential current that is a difference between a first current flowing through the first monitoring unit and a second current flowing through the second monitoring unit, wherein one terminal of the series connection and one power terminal of the first monitoring unit are connected, the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit are connected, and the other power terminal of the second monitoring unit and the other terminal of the series connection are connected, and wherein the current cancellation unit is disposed between a connection point between the other power terminal of the first monitoring unit and one power terminal of the second monitoring unit and a middle connection point in the middle of the series connection. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification