Battery processing system and battery processing method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShohei Matsuoka
Life of this patent
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Abstract
A control device executes processing including: executing first elimination processing when there is a history of addition of degradation indicator values ΣD and also when degradation indicator value ΣD is larger than a first threshold value TH1; measuring a characteristic value of a cell; executing second elimination processing; determining reusability when the characteristic value is within an allowable range; determining unreusability when the characteristic value is out of the allowable range; and executing the second elimination processing when degradation indicator value ΣD is first threshold value TH1 or less.
Claims6
A battery processing system comprising:
- a lithium-ion battery including an electrode assembly;
- and
- a control device that controls charge and discharge of the lithium-ion battery,
- wherein the control device
- acquires an indicator value indicating an extent of progress of degradation of the lithium-ion battery due to a nonuniformity of a concentration distribution of lithium ions within the electrode assembly,
- when the indicator value is more than a first threshold value, executes first elimination processing of eliminating the degradation due to the nonuniformity of the concentration distribution, and
- when the indicator value is the first threshold value or less and also when there is a period during which the indicator value is more than a second threshold value that is smaller than the first threshold value, executes second elimination processing of eliminating degradation due to a nonuniformity of potentials in an electrode plane of the electrode assembly that occurs as a result of discharge of the lithium-ion battery.
A battery processing method for eliminating degradation of a lithium-ion battery including an electrode assembly, the battery processing method comprising:
- acquiring an indicator value indicating an extent of progress of degradation of the lithium-ion battery due to a nonuniformity of a concentration distribution of lithium ions within the electrode assembly;
- when the indicator value is more than a first threshold value, executing first elimination processing of eliminating the degradation due to the nonuniformity of the concentration distribution;
- and
- when the indicator value is the first threshold value or less and also when there is a period during which the indicator value is more than a second threshold value that is smaller than the first threshold value, executing second elimination processing of eliminating degradation due to a nonuniformity of potentials in an electrode plane of the electrode assembly that occurs as a result of discharge of the lithium-ion battery.
Dependencies are inferred from the claim text.