BATTERY MONITORING SYSTEM
First Claim
1. A battery monitoring system for monitoring a state of a battery pack including n (n:
- an integer) pieces of battery cells connected in series over a plurality of stages, comprising;
an input circuit to which respective voltage signals of the battery cells are inputted;
a multiplexer configured to;
select a battery cell for voltage detection from the n pieces of battery cells;
select voltage signals inputted from the input circuit; and
output the selected voltage signals;
a first voltage measuring circuit configured to measuring a voltage based on a voltage signal in a first route outputted from the multiplexer;
a second voltage measuring circuit configured to measuring a voltage based on a voltage signal in a second route outputted from the multiplexer, at the same time as measurement of the first voltage measurement circuit;
a comparator configured to compare a measurement result by the first voltage measuring circuit with a measurement result by the second voltage measuring circuit; and
a control unit configured on a basis of a comparison result by the comparator to judge at least one of;
a voltage of each of the battery cells;
an operation check of equalizing the voltages of the respective battery cells;
a presence or absence of a disconnection of a detection line of each of the battery cells; and
a presence or absence of a failure in the multiplexer.
2 Assignments
0 Petitions
Accused Products
Abstract
A battery monitoring system includes: an input circuit to which voltage signals of battery cells are inputted; a multiplexer selecting a battery cell for voltage detection from the battery cells, selecting voltage signals inputted from the input circuit, and outputting the selected voltage signals; first and a second voltage measuring circuits simultaneously measuring voltages based on the voltage signals in first and second routes outputted from the multiplexer; a comparator comparing measurement results by the first voltage measuring circuit and by the second voltage measuring circuit; and a control unit that judges, on a basis of a comparison result by the comparator, at least one of a voltage of each battery cell, an operation check of equalizing the voltages of the battery cells, a presence or absence of a disconnection of a detection line of each battery cell, and a presence or absence of a failure in the multiplexer.
12 Citations
5 Claims
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1. A battery monitoring system for monitoring a state of a battery pack including n (n:
- an integer) pieces of battery cells connected in series over a plurality of stages, comprising;
an input circuit to which respective voltage signals of the battery cells are inputted; a multiplexer configured to; select a battery cell for voltage detection from the n pieces of battery cells; select voltage signals inputted from the input circuit; and output the selected voltage signals; a first voltage measuring circuit configured to measuring a voltage based on a voltage signal in a first route outputted from the multiplexer; a second voltage measuring circuit configured to measuring a voltage based on a voltage signal in a second route outputted from the multiplexer, at the same time as measurement of the first voltage measurement circuit; a comparator configured to compare a measurement result by the first voltage measuring circuit with a measurement result by the second voltage measuring circuit; and a control unit configured on a basis of a comparison result by the comparator to judge at least one of; a voltage of each of the battery cells; an operation check of equalizing the voltages of the respective battery cells; a presence or absence of a disconnection of a detection line of each of the battery cells; and a presence or absence of a failure in the multiplexer. - View Dependent Claims (2, 3, 4, 5)
- an integer) pieces of battery cells connected in series over a plurality of stages, comprising;
Specification