Abnormality diagnosis device and method for battery pack
First Claim
1. An abnormality diagnosis device for a battery pack comprising a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, comprising:
- a voltage detection device which detects voltages of each parallel block of the battery pack; and
an abnormality determination device which performs a diagnosis of abnormality of the cells connected in parallel within each parallel block, based upon an amount of change of voltages of each parallel block during discharge or charge of the battery pack.
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Abstract
In a battery pack which includes a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, the voltage of each parallel block of the battery pack before and after discharge or before and after charge of a predetermined amount of capacity is detected, and abnormality of the cells connected in parallel within each parallel block is determined based upon the amount of change of voltage of each parallel block.
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Citations
23 Claims
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1. An abnormality diagnosis device for a battery pack comprising a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, comprising:
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a voltage detection device which detects voltages of each parallel block of the battery pack; and
an abnormality determination device which performs a diagnosis of abnormality of the cells connected in parallel within each parallel block, based upon an amount of change of voltages of each parallel block during discharge or charge of the battery pack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An abnormality diagnosis device for a battery pack comprising a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, comprising:
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a voltage detection means for detecting voltages of each parallel block of the battery pack; and
an abnormality determination means for performing a diagnosis of abnormality of the cells connected in parallel within each parallel block, based upon an amount of change of voltages of each parallel block during discharge or charge of the battery pack.
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13. An abnormality diagnosis method for a battery pack comprising a plurality of parallel blocks, each of which comprises a plurality of cells connected in parallel, and which are themselves connected in series, comprising:
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detecting voltages of each parallel block of the battery pack during discharge or charge of the battery pack; and
performing a diagnosis of an abnormality of the cells connected in parallel within each parallel block based upon an amount of change of voltages of each parallel block. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification