BATTERY CELL MONITORING CIRCUIT, BATTERY CELL MODULE, AUTOMOBILE WITH BATTERY CELL MODULE
First Claim
1. A battery cell monitoring circuit for detecting an abnormity in cell balancing and a terminal of a battery cell, the battery cell monitoring circuit comprising:
- a first cell voltage measuring terminal configured to be connected to a positive electrode side of the battery cell;
a first cell balancing terminal configured to be connected to the positive electrode side of the battery cell, and configured to be arranged in parallel with the first cell voltage measuring terminal;
a second cell voltage measuring terminal configured to be connected to a negative electrode side of the battery cell;
a second cell balancing terminal configured to be connected to the negative electrode side of the battery cell, and configured to be arranged in parallel with the second cell voltage measuring terminal;
a first switch having one end connected to the first cell balancing terminal, and the other end connected to the second cell balancing terminal, the first switch configured to perform cell balancing by being turned on/off based on a first control signal;
a current source and a second switch which are arranged in parallel with the first switch and are connected in series between the one end and the other end of the first switch, the current source configured to supply a current, the second switch configured to be turned on/off based on a second control signal;
a first detection unit configured to receive a first cell voltage measuring terminal voltage and a first cell balancing terminal voltage, and configured to detect a terminal open state; and
a second detection unit configured to receive a second cell voltage measuring terminal voltage and a second cell balancing terminal voltage, and configured to detect a terminal open state.
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Accused Products
Abstract
According to one embodiment, a battery cell monitoring circuit detects an abnormity in the cell balancing and terminals of each battery cell. One end of the first switch is connected to the first cell balancing terminal, and the other end of the first switch is connected to the second cell balancing terminal, so that the first switch is turned on/off based on a first control signal to perform cell balancing. The current source and the second switch are arranged in parallel with the first switch, and are connected in series between the one end and the other end of the first switch. The current source supplies a current. The second switch is turned on/off based on a second control signal. The first detection unit receives a first cell voltage measuring terminal voltage and a first cell balancing terminal voltage, and detects a terminal open state. The second detection unit receives a second cell voltage measuring terminal voltage and a second cell balancing terminal voltage, and detects a terminal open state.
43 Citations
16 Claims
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1. A battery cell monitoring circuit for detecting an abnormity in cell balancing and a terminal of a battery cell, the battery cell monitoring circuit comprising:
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a first cell voltage measuring terminal configured to be connected to a positive electrode side of the battery cell; a first cell balancing terminal configured to be connected to the positive electrode side of the battery cell, and configured to be arranged in parallel with the first cell voltage measuring terminal; a second cell voltage measuring terminal configured to be connected to a negative electrode side of the battery cell; a second cell balancing terminal configured to be connected to the negative electrode side of the battery cell, and configured to be arranged in parallel with the second cell voltage measuring terminal; a first switch having one end connected to the first cell balancing terminal, and the other end connected to the second cell balancing terminal, the first switch configured to perform cell balancing by being turned on/off based on a first control signal; a current source and a second switch which are arranged in parallel with the first switch and are connected in series between the one end and the other end of the first switch, the current source configured to supply a current, the second switch configured to be turned on/off based on a second control signal; a first detection unit configured to receive a first cell voltage measuring terminal voltage and a first cell balancing terminal voltage, and configured to detect a terminal open state; and a second detection unit configured to receive a second cell voltage measuring terminal voltage and a second cell balancing terminal voltage, and configured to detect a terminal open state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery cell monitoring circuit for detecting an abnormity in cell balancing and a terminal of a battery cell, the battery cell monitoring circuit comprising:
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a first cell voltage measuring terminal configured to be connected to a positive electrode side of the battery cell; a first cell balancing terminal configured to be connected to the positive electrode side of the battery cell, and configured to be arranged in parallel with the first cell voltage measuring terminal; a second cell voltage measuring terminal configured to be connected to a negative electrode side of the battery cell; a second cell balancing terminal configured to be connected to the negative electrode side of the battery cell, and configured to be arranged in parallel with the second cell voltage measuring terminal; a first switch having one end configured to be connected to the first cell balancing terminal, the first switch configured to perform cell balancing by being turned on/off based on a first control signal; a first resistance having one end connected to the other end of the first switch, and the other end connected to the second cell balancing terminal; and a detection circuit having a first input side connected to the one end of the first resistance, and a second input side connected to the other end of the first resistance, the detection circuit configured to detect a current flowing through the first resistance. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A battery cell module comprising:
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a battery cell unit in which battery cells are stacked or arranged in parallel; and a battery cell monitoring circuit for detecting an abnormity in cell balancing and a terminal of the battery cell, wherein the battery cell monitoring circuit includes; a first cell voltage measuring terminal configured to be connected to a positive electrode side of the battery cell, a first cell balancing terminal configured to be connected to the positive electrode side of the battery cell, and configured to be arranged in parallel with the first cell voltage measuring terminal, a second cell voltage measuring terminal configured to be connected to a negative electrode side of the battery cell, a second cell balancing terminal configured to be connected to the negative electrode side of the battery cell, and configured to be arranged in parallel with the second cell voltage measuring terminal, a first switch having one end connected to the first cell balancing terminal, and the other end connected to the second cell balancing terminal, the first switch configured to perform cell balancing by being turned on/off based on a first control signal, a current source and a second switch which are arranged in parallel with the first switch and are connected in series between the one end and the other end of the first switch, the current source configured to supply a current, the second switch configured to be turned on/off based on a second control signal; a first detection unit configured to receive a first cell voltage measuring terminal voltage and a first cell balancing terminal voltage, and configured to detect a terminal open state, and a second detection unit configured to receive a second cell voltage measuring terminal voltage and a second cell balancing terminal voltage, and configured to detect a terminal open state. - View Dependent Claims (16)
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Specification