CHARGING CONTROL DEVICE, CHARGING CONTROL METHOD, AND PROGRAM

• US 20130285608A1
• Filed: 12/28/2011
• Published: 10/31/2013
• Est. Priority Date: 01/06/2011
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Jikihara, Takashi
• Application Number:
  US13/977,813
• Publication Number:
  US 20130285608A1
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2240/662 Temperature
• CPC Class Codes: B60L 2240/667 Precipitation
• CPC Class Codes: B60L 2240/72 Charging station selection relying on external data
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 2250/12 by confirmation, e.g. of the input
• CPC Class Codes: B60L 2250/14 by input of vehicle departure time
• CPC Class Codes: B60L 2260/42 by adaptive correction
• CPC Class Codes: B60L 2260/52 drive range estimation, e.g. of estimation of available travel distance
• CPC Class Codes: B60L 2260/54 Energy consumption estimation
• CPC Class Codes: B60L 2260/58 Departure time prediction
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: B60L 53/67 Controlling two or more charging stations
• CPC Class Codes: B60L 53/80 : Exchanging energy storage elements, e.g. removable batteries
• CPC Class Codes: B60L 58/15 : Preventing overcharging
• CPC Class Codes: B60L 58/16 : responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: H01M 10/0525 : Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/44 : Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/443 : in response to temperature
• CPC Class Codes: H01M 10/48 : Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 10/486 : for measuring temperature
• CPC Class Codes: H01M 2220/20 : Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/48 : for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/02 : for charging batteries from ac mains by converters
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A charging control device includes: a remaining charge acquisition unit that obtains a remaining charge of a rechargeable battery for an electric vehicle; a lifespan information acquisition unit that obtains lifespan information expressing a degree of deterioration of the rechargeable battery; an environmental information acquisition unit that obtains information indicating a peripheral temperature of the electric vehicle; and a charging plan updating unit that creates a charging plan including a target remaining charge of the rechargeable battery and a charging process up to achievement of the target remaining charge. The charging plan updating unit determines whether or not to create the charging plan in consideration of the deterioration of the rechargeable battery on the basis of the lifespan information, and after determining to take the deterioration of the rechargeable battery into consideration, creates the charging plan such that when the temperature is equal to or higher than a predetermined value, the remaining charge of the rechargeable battery is maintained at or below a predetermined value for as long as possible during a charging period.

Claims

1. A charging control device comprising:

a remaining charge acquisition unit that obtains a remaining charge of a rechargeable battery for an electric vehicle;

a lifespan information acquisition unit that obtains lifespan information expressing a degree of deterioration of the rechargeable battery;

an environmental information acquisition unit that obtains information indicating a peripheral temperature of the electric vehicle; and

a charging plan updating unit that creates a charging plan including a target remaining charge of the rechargeable battery and a charging process up to achievement of the target remaining charge,

wherein the charging plan updating unit determines whether or not to create the charging plan in consideration of the deterioration of the rechargeable battery on the basis of the lifespan information, and

after determining to take the deterioration of the rechargeable battery into consideration, creates the charging plan such that when the temperature is equal to or higher than a predetermined value, the remaining charge of the rechargeable battery is maintained at or below a predetermined value for as long as possible during a charging period.

2. The charging control device according to claim 1, further comprising a use start time prediction unit that predicts a use start time of the electric vehicle,

wherein, when the charging plan updating unit determines to take the deterioration of the rechargeable battery into consideration and the temperature is equal to or higher than the predetermined value, the charging plan updating unit calculates a charging start time from a charging time required for the rechargeable battery to reach the target remaining charge so that charging is completed exactly at the use start time, and creates the charging plan such that charging is not performed until the charging start time.

3. The charging control device according to claim 1, wherein when taking the deterioration of the rechargeable battery into consideration, the charging plan updating unit creates the charging plan so that variation in the remaining charge per unit time during the charging period does not exceed a predetermined threshold.

4. The charging control device according to claim 1, further comprising a power consumption prediction unit that predicts a power amount to be consumed by the electric vehicle during a following journey,

wherein the charging plan updating unit determines the target remaining charge on the basis of the predicted power amount.

5. The charging control device according to claim 1, wherein the charging plan updating unit creates charging plans for a plurality of rechargeable batteries,

creates a resource plan including a relationship between time and a power amount required to execute the charging plans of the respective rechargeable batteries, and

when the created resource plan exceeds a usable power amount, corrects the resource plan and recreates charging plans of the respective rechargeable batteries in accordance with the corrected resource plan.

6. A charging control method comprising the steps of:

obtaining a remaining charge of a rechargeable battery for an electric vehicle;

obtaining lifespan information expressing a degree of deterioration of the rechargeable battery;

obtaining information indicating a peripheral temperature of the electric vehicle; and

creating a charging plan including a target remaining charge of the rechargeable battery and a charging process up to achievement of the target remaining charge,

wherein, in the step of creating the charging plan, a determination is made on the basis of the lifespan information as to whether or not to create the charging plan in consideration of the deterioration of the rechargeable battery, and

after determining to take the deterioration of the rechargeable battery into consideration, the charging plan is created such that when the temperature is equal to or higher than a predetermined value, the remaining charge of the rechargeable battery is maintained at or below a predetermined value for as long as possible during a charging period.

7. A program for causing a computer to function as:

a remaining charge acquisition unit that obtains a remaining charge of a rechargeable battery for an electric vehicle;

a lifespan information acquisition unit that obtains lifespan information expressing a degree of deterioration of the rechargeable battery;

an environmental information acquisition unit that obtains information indicating a peripheral temperature of the electric vehicle; and

a charging plan updating unit that creates a charging plan including a target remaining charge of the rechargeable battery and a charging process up to achievement of the target remaining charge,

wherein the charging plan updating unit determines whether or not to create the charging plan in consideration of the deterioration of the rechargeable battery on the basis of the lifespan information, and

after determining to take the deterioration of the rechargeable battery into consideration, creates the charging plan such that when the temperature is equal to or higher than a predetermined value, the remaining charge of the rechargeable battery is maintained at or below a predetermined value for as long as possible during a charging period.