# US 9,753,093 B2 · Vehicle and method of diagnosing battery condition of same

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- Number: US 9,753,093 B2
- Document ID: US9753093B2
- Status: Granted
- Kind: B2
- Application number: 12/721,605
- Filed: 2010-03-11
- Published: 2011-09-15
- Granted: 2017-09-05
- Earliest claimed: 2010-03-11
- Assignees: Ford Global Technologies, LLC
- Applicants: Allan Roy Gale; Bruce Carvell Blakemore; Michael W. Degner; Paul Theodore Momcilovich
- Inventors: Allan Roy Gale; Bruce Carvell Blakemore; Michael W. Degner; Paul Theodore Momcilovich
- Web page: https://patentgrep.com/patent/US9753093B2

## CPC

- G01R 31/389: Measuring internal impedance, internal conductance or related variables
- B60L 53/14: Conductive energy transfer
- B60L 58/10: for monitoring or controlling batteries
- B60L 58/15: Preventing overcharging
- B60L 58/16: responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
- B60L 58/27: by heating
- G01R 31/392: Determining battery ageing or deterioration, e.g. state of health
- B60L 2240/545: Temperature
- B60L 2240/547: Voltage
- B60L 2240/549: Current
- B60L 2240/80: Time limits
- B60L 2250/16: by display
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 90/14: Plug-in electric vehicles
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for diagnosing a battery may include applying a generally constant current to the battery for a period of time, measuring a response voltage of the battery to the applied current, determining battery impedance parameters based on at least one of the applied current, period of time, and response voltage, and determining a degradation condition of the battery based on the battery impedance parameters.

## Claims

### Claim 1

A vehicle comprising:
a battery disposed within the vehicle; and
a battery charger disposed within the vehicle and configured to
receive power from a wall outlet and transfer the power to the battery to charge the battery, and
while operating to charge the battery, identify a degradation condition of the battery defined by a battery cell capacitance, that incorporates electrical and active material activation energy requirements, being less than a predefined range of capacitance values, a ratio of battery amp-hours out to battery amp-hours in falling within a predefined range of ratio values, and a total battery amp-hours stored falling within a predefined range of amp-hour values.

### Claim 2 (depends on 1)

The vehicle of claim 1, wherein the degradation condition is a dry out condition.

### Claim 3

A method comprising:
while charging a battery, detecting a degradation of a battery responsive to a cell capacitance, that incorporates electrical and active material activation energy requirements, being below a predefined range of capacitance values, a ratio of battery amp-hours out to battery amp-hours in falling within a predefined range of ratio values, and a total battery amp-hours stored falling within a predefined range of amp-hour values; and
altering the charging responsive to the detecting.

### Claim 4 (depends on 3)

The method of claim 3, wherein altering the charging includes discontinuing the charging.

### Claim 5 (depends on 3)

The method of claim 3, wherein altering the charging includes altering a charge voltage or maximum current associated with the charging.