US 11,535,121 B2Granted

Electric powered vehicle and control method for electric powered vehicle

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsKoji Hokoi, Yu Nakao, Yoshimitsu Takahashi, Yoshihiro Uchida, Kazuki Furuta, Kazuto Roppongi

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Abstract

An ECU switches a control mode to an HV mode when an SOC decreases to a lower limit during an EV mode. The ECU calculates an evaluation value ΣD of high-rate deterioration indicating a deterioration component of a secondary battery due to non-uniformity in salt concentration in a battery. The ECU executes high-rate deterioration inhibiting control when the HV mode is currently selected and when the battery is evaluated as deteriorating based on the evaluation value ΣD, the high-rate deterioration inhibiting control being control for increasing the SOC by making a control target of the SOC higher than the lower limit of the SOC. On the other hand, the ECU does not execute the high-rate deterioration inhibiting control when the EV mode is currently selected.

Claims5

Dependent claims

An electric powered vehicle comprising:

a vehicle drive apparatus configured to generate vehicle drive power by receiving electric power and to generate electric power;
a secondary battery configured to exchange electric power with the vehicle drive apparatus;
and
a controller configured to switch a control mode to an HV mode when an SOC of the secondary battery decreases to a lower limit during an EV mode, the HV mode being a mode in which the SOC is controlled to the lower limit, the EV mode being a mode in which the SOC is consumed,
the controller being further configured:
to calculate an evaluation value indicating a degree of deterioration of the secondary battery due to non-uniformity in salt concentration in the secondary battery;
to execute deterioration inhibiting control when the HV mode is selected and when the secondary battery is evaluated as deteriorating based on the evaluation value, the deterioration inhibiting control being control for increasing the SOC by making a control target of the SOC higher than the lower limit;
and
not to switch, when the EV mode is selected, the control mode to the HV mode until the SOC decreases to the lower limit even when the secondary battery is evaluated as deteriorating based on the evaluation value.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/260,542Filed 29 Jan 2019
Priority: JP JP2018-01354530 Jan 2018
Published: US 2019/0232815 A11 Aug 2019
Granted: 27 Dec 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

B60L 58/16
For monitoring or controlling batteries: responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
B60K 6/445
Series-parallel type: differential gearing distribution type
B60L 50/16
Using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines: with provision for separate direct…
B60L 50/61
Using power supplied by batteries: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles