Battery monitoring apparatus
First Claim
1. A battery monitoring apparatus, comprising:
- a plurality of connection lines that are connected to each of a pair of positive and negative electrode terminals of each of a plurality of battery cells connected in series to form a battery pack;
a monitoring circuit that is provided with a pair of sensing terminals for each pair of positive and negative electrode terminals of each of the plurality of battery cells, and that includes a voltage detection circuit which detects a cell voltage applied to the pair of sensing terminals;
a first filter circuit that is provided in a pair of connection lines of the plurality of connection lines connected to the pair of sensing terminals and removes noise generated between the pair of connection lines; and
a second filter circuit that removes noise,wherein;
the plurality of connection lines includesa plurality of common lines that are connected to a plurality of common terminals which are located between adjacent battery cells of the plurality of battery cells and shared between a negative electrode terminal of a high-potential side battery cell of the adjacent battery cells and a positive electrode terminal of a low-potential side battery cell of the adjacent battery cells, andfirst and second branch lines that are branched from each of the common lines, the first branch line being connected to the negative electrode terminal of the high-potential side battery cell, the second branch line being connected to the positive electrode terminal of the low-potential side battery cell;
the first filter circuit includesfirst resistors that are located on the first and second branch lines connected to the pair of sensing terminals, anda first capacitor that is located between the first and second branch lines connected to the pair of sensing terminals; and
the second filter circuit includesa second resistor that is located on the plurality of connection lines, anda second capacitor that is connected in series between the plurality of connection lines without passing through the first resistors or the second resistor.
1 Assignment
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Accused Products
Abstract
A battery monitoring apparatus a plurality of connection lines, a monitoring circuit, a first filter circuit, and a second filter circuit. The monitoring circuit is provided with a pair of sensing terminals for each pair of positive and negative electrode terminals of each of a plurality of battery cells of a battery pack. The plurality of connection lines includes a plurality of common line and first and second branch lines. The first filter circuit includes first resistors located on the first and second branch lines connected to the pair of sensing terminals, and a first capacitor located between the first and second branch lines connected to the pair of sensing terminals. The second filter circuit includes a second resistor located on the plurality of connection lines, and a second capacitor connected in series between the plurality of connection lines without passing through the first resistors or the second resistor.
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Citations
14 Claims
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1. A battery monitoring apparatus, comprising:
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a plurality of connection lines that are connected to each of a pair of positive and negative electrode terminals of each of a plurality of battery cells connected in series to form a battery pack; a monitoring circuit that is provided with a pair of sensing terminals for each pair of positive and negative electrode terminals of each of the plurality of battery cells, and that includes a voltage detection circuit which detects a cell voltage applied to the pair of sensing terminals; a first filter circuit that is provided in a pair of connection lines of the plurality of connection lines connected to the pair of sensing terminals and removes noise generated between the pair of connection lines; and a second filter circuit that removes noise, wherein; the plurality of connection lines includes a plurality of common lines that are connected to a plurality of common terminals which are located between adjacent battery cells of the plurality of battery cells and shared between a negative electrode terminal of a high-potential side battery cell of the adjacent battery cells and a positive electrode terminal of a low-potential side battery cell of the adjacent battery cells, and first and second branch lines that are branched from each of the common lines, the first branch line being connected to the negative electrode terminal of the high-potential side battery cell, the second branch line being connected to the positive electrode terminal of the low-potential side battery cell; the first filter circuit includes first resistors that are located on the first and second branch lines connected to the pair of sensing terminals, and a first capacitor that is located between the first and second branch lines connected to the pair of sensing terminals; and the second filter circuit includes a second resistor that is located on the plurality of connection lines, and a second capacitor that is connected in series between the plurality of connection lines without passing through the first resistors or the second resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A battery system, comprising:
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a battery pack that is configured by a plurality of battery cells connected in series to each other; and a battery monitoring apparatus that includes; a plurality of connection lines that are connected to each of a pair of positive and negative electrode terminals of each of the plurality of battery cells; a monitoring circuit that is provided with a pair of sensing terminals for each pair of positive and negative electrode terminals of each of the plurality of battery cells, and that includes a voltage detection circuit which detects a cell voltage applied to the pair of sensing terminals; a first filter circuit that is provided in a pair of connection lines of the plurality of connection lines connected to the pair of sensing terminals and removes noise generated between the pair of connection lines; and a second filter circuit that removes noise, wherein; the plurality of connection lines includes a plurality of common lines that are connected to a plurality of common terminals which are located between adjacent battery cells of the plurality of battery cells and shared between a negative electrode terminal of a high-potential side battery cell of the adjacent battery cells and a positive electrode terminal of a low-potential side battery cell of the adjacent battery cells, and first and second branch lines that are branched from each of the common lines, the first branch line being connected to the negative electrode terminal of the high-potential side battery cell, the second branch line being connected to the positive electrode terminal of the low-potential side battery cell; the first filter circuit includes first resistors that are located on the first and second branch lines connected to the pair of sensing terminals, and a first capacitor that is located between the first and second branch lines connected to the pair of sensing terminals; and the second filter circuit includes a second resistor that is located on the plurality of connection lines, and a second capacitor that is connected in series between the plurality of connection lines without passing through the first resistors or the second resistor.
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Specification