Cell evaluation device including short circuit detector
First Claim
1. A cell evaluation device for evaluating the safety of a cell based on a state of a test cell when pressure is used to forcibly generate an internal short circuit within the test cell, the cell evaluation device comprising:
- a short circuit detector for detecting the occurrence of an internal short circuit within the test cell, the test cell including an electrolyte solution;
a pressure controller for controlling the pressure applied once the short circuit detector has detected the internal short circuit; and
a cell information detector for detecting the state of the test cell,wherein said short circuit detector is configured, upon detection of the internal short circuit within the test cell, to output a short circuit detection signal to the pressure controller and to the cell information detector.
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Accused Products
Abstract
A cell evaluation device has a short circuit detection portion to detect an internal short circuit within a test cell that has been subjected to nail penetration or crushing using the pressure from a pressurization portion, a pressure control portion to halt the operation of the pressurization portion on detection of a short circuit, and a cell information detection portion to collect and record cell information such as the cell temperature. By using such a cell evaluation device, the location of an internal short circuit during an abuse test is specified, and variations in the cell temperature increase accompanying the internal short circuit is minimized.
15 Citations
15 Claims
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1. A cell evaluation device for evaluating the safety of a cell based on a state of a test cell when pressure is used to forcibly generate an internal short circuit within the test cell, the cell evaluation device comprising:
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a short circuit detector for detecting the occurrence of an internal short circuit within the test cell, the test cell including an electrolyte solution; a pressure controller for controlling the pressure applied once the short circuit detector has detected the internal short circuit; and a cell information detector for detecting the state of the test cell, wherein said short circuit detector is configured, upon detection of the internal short circuit within the test cell, to output a short circuit detection signal to the pressure controller and to the cell information detector. - View Dependent Claims (3, 4, 9, 11, 13, 15)
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2. A cell evaluation device for evaluating the safety of a cell based on a state of a test cell when pressure is used to forcibly generate an internal short circuit within the test cell, the cell evaluation device comprising:
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a short circuit detector for detecting the occurrence of an internal short circuit within the test cell; a pressure controller for controlling the pressure once the short circuit detector has detected an internal short circuit; a cell information detector for detecting the state of the test cell; and a short circuit current controller for controlling the current flowing through the test cell to flow in the charge direction or to flow the discharge direction once the short circuit detector has detected the internal short circuit wherein said short circuit current controller comprises a switching circuit, a short circuit current control circuit and a current detection circuit connected in series to the test cell, and wherein, when the internal short circuit is detected by said short circuit detector, a detection signal is sent to the switching circuit of the short circuit current controller. - View Dependent Claims (5, 6, 7, 8, 10, 12, 14)
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Specification