Monitoring apparatus for secondary battery
First Claim
1. A monitoring apparatus for a secondary battery including a plurality of assembled batteries, whereineach of said plurality of assembled batteries has a plurality of battery blocks, andin at least one of said plurality of assembled batteries, a number of battery cells constituting each of said plurality of battery blocks is different from a reference number of cells of another of said plurality of assembled batteries, said monitoring apparatus comprising:
- a voltage detecting circuit detecting an inter-terminal voltage for each of said plurality of battery blocks; and
a processing unit calculating a state of charge for each of said plurality of battery blocks, based on said inter-terminal voltage, whereinsaid processing unit converts said inter-terminal voltage into a voltage per said reference number of cells for a battery block having the number of said battery cells different than said reference number of cells among said plurality of battery blocks, and obtains said state of charge.
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Abstract
When the number of battery cells of a certain battery block is different from a reference number of cells, the inter-terminal voltage of the battery block is converted into the voltage corresponding to the reference number of cells. Thus, even when a plurality of battery blocks being different in the number of battery cells are included, a map for calculating the SOC may only be one. That is, since conventional software or calculation methods can be used, it is not necessary to increase the capacity of SOC calculation software or allowable battery output calculation software. As a result, a plurality of assembled batteries being different in the number of battery cells constituting each battery block can appropriately be monitored.
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Citations
8 Claims
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1. A monitoring apparatus for a secondary battery including a plurality of assembled batteries, wherein
each of said plurality of assembled batteries has a plurality of battery blocks, and in at least one of said plurality of assembled batteries, a number of battery cells constituting each of said plurality of battery blocks is different from a reference number of cells of another of said plurality of assembled batteries, said monitoring apparatus comprising: -
a voltage detecting circuit detecting an inter-terminal voltage for each of said plurality of battery blocks; and a processing unit calculating a state of charge for each of said plurality of battery blocks, based on said inter-terminal voltage, wherein said processing unit converts said inter-terminal voltage into a voltage per said reference number of cells for a battery block having the number of said battery cells different than said reference number of cells among said plurality of battery blocks, and obtains said state of charge. - View Dependent Claims (2, 3, 4)
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5. A monitoring apparatus for a secondary battery including a plurality of assembled batteries, wherein
each of said plurality of assembled batteries has a plurality of battery blocks, and in at least one of said plurality of assembled batteries, a number of battery cells constituting each of said plurality of battery blocks is different from a reference number of cells of another of said plurality of assembled batteries, said monitoring apparatus comprising: -
a voltage detecting circuit detecting a plurality of inter-terminal voltages respectively corresponding to said plurality of battery blocks; and a processing unit performing an abnormality determination of said secondary battery using said plurality of inter-terminal voltages detected by said voltage detecting circuit, wherein said processing unit selects, out of said plurality of inter-terminal voltages, first and second inter-terminal voltages respectively corresponding to, among said plurality of battery blocks, first and second battery blocks being identical in number of said battery cells, and determines abnormality of said secondary battery by using said first and second inter-terminal voltages. - View Dependent Claims (6, 7, 8)
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Specification
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- Resources
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Current AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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Original AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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InventorsAridome, Koji
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Primary Examiner(s)Bui; Bryan
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Application NumberUS12/087,667Publication NumberTime in Patent Office1,565 DaysField of Search702/63, 702/64, 320/106, 320/134, 320/136, 429/24US Class Current702/63CPC Class CodesG01R 31/3835 involving only voltage meas...G01R 31/396 Acquisition or processing o...
