Battery pack and method of controlling charging of battery pack
First Claim
Patent Images
1. A battery pack, comprising:
- a battery cell;
a charge-blocking unit;
a voltage sensing and balancing circuit; and
a microcomputer, the microcomputer including a controller configured to detect at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller configured to output a charge control signal to the charge-blocking unit to inhibit charging of the battery cell, wherein;
the microcomputer further includes an analog-to-digital (A/D) converter that converts analog voltage, temperature, and current measurements from the battery cell into digital output values, andthe controller outputs a charge control signal to the charge-blocking unit if the difference between a measurement value obtained by inputting a voltage of a zener diode to the A/D converter and a reference value recorded during an initial test of the microcomputer is equal to or greater than a first threshold.
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Abstract
A battery pack includes a battery cell, a charge-blocking unit, a voltage sensing and balancing circuit, and a microcomputer, the microcomputer including a controller that detects at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller outputting a charge control signal to the charge-blocking unit to inhibit charging of the battery cell.
28 Citations
14 Claims
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1. A battery pack, comprising:
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a battery cell; a charge-blocking unit; a voltage sensing and balancing circuit; and a microcomputer, the microcomputer including a controller configured to detect at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller configured to output a charge control signal to the charge-blocking unit to inhibit charging of the battery cell, wherein; the microcomputer further includes an analog-to-digital (A/D) converter that converts analog voltage, temperature, and current measurements from the battery cell into digital output values, and the controller outputs a charge control signal to the charge-blocking unit if the difference between a measurement value obtained by inputting a voltage of a zener diode to the A/D converter and a reference value recorded during an initial test of the microcomputer is equal to or greater than a first threshold. - View Dependent Claims (2, 3)
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4. A battery pack, comprising:
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a battery cell; a charge-blocking unit; a voltage sensing and balancing circuit; and a microcomputer, the microcomputer including a controller configured to detect at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller configured to output a charge control signal to the charge-blocking unit to inhibit charging of the battery cell, wherein; the battery pack includes a plurality of battery cells, and the controller outputs a charge control signal to the charge-blocking unit if a difference between a sum of voltages of the plurality of battery cells and a voltage of the battery pack is equal to or greater than a second threshold. - View Dependent Claims (5, 6, 7)
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8. A battery pack, comprising:
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a battery cell; a charge-blocking unit; a voltage sensing and balancing circuit; and a microcomputer, the microcomputer including a controller configured to detect at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller configured to output a charge control signal to the charge-blocking unit to inhibit charging of the battery cell, wherein; the microcomputer further includes a temperature measuring unit for measuring the temperature of the microcomputer, and the controller outputs a charge control signal to the charge-blocking unit if a difference between the temperature of the battery cell and the temperature of the microcomputer is equal to or greater than a fourth threshold. - View Dependent Claims (9, 10, 11)
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12. A battery pack, comprising:
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a battery cell; a charge-blocking unit; a voltage sensing and balancing circuit; and a microcomputer, the microcomputer including a controller configured to detect at least one selected from the group of abnormal analog-to-digital conversion, abnormal voltage, and abnormal temperature of the battery cell, the controller configured to output a charge control signal to the charge-blocking unit to inhibit charging of the battery cell, wherein the controller detects, at least twice, at least one selected from the group of abnormal analog-to-digital conversion of the microcomputer, abnormal voltage, and abnormal temperature of the battery cells. - View Dependent Claims (13, 14)
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Specification
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Current AssigneeSamsung SDI Company Limited
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Original AssigneeSamsung SDI Company Limited
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InventorsYang, Jong-Woon, Segawa, Susumu, Park, In-Kyu, Okada, Tetsuya, Kim, Jin-Wan
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Primary Examiner(s)DIAO, M BAYE
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Application NumberUS12/926,405Publication NumberTime in Patent Office1,008 DaysField of Search320/152, 320/116, 320118-119US Class Current320/152CPC Class CodesH02J 7/0014 Circuits for equalisation o...H02J 7/0029 with safety or protection d...H02J 7/00302 Overcharge protectionH02J 7/00306 Overdischarge protectionH02J 7/00714 in response to battery char...H02J 7/007182 in response to battery voltageH02J 7/007192 in response to temperatureH02J 7/007194 of the batteryH02J 7/04 Regulation of charging curr...
