Vehicle-use battery monitor apparatus

• US 20080201055A1
• Filed: 01/28/2008
• Published: 08/21/2008
• Est. Priority Date: 02/15/2007
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Maeda, Shunichi
• Granted Patent: US 7,552,006 B2
• Time in Patent Office: Days
• US Class Current: 701/102
• CPC Class Codes: G01R 31/007 using microprocessors or computers
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• 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: Y02E 60/10 Energy storage using batteries

Abstract

The vehicle-use battery monitor apparatus includes a first function of receiving a power generation rate indicative of an operating state of a vehicle alternator from a power generation control device, a second function of detecting a charge/discharge current of a vehicle battery, a third function of transmitting the power generation rate to an electronic control unit for controlling an output power of a vehicle engine in order that an idle-up control is performed depending on a value of the power generation rate, a fourth function of increasing the value of the power generation rate when it is determined that the vehicle battery is in a discharge state on the basis of a detection result by the second function, and a fifth function of generating a notification signal in accordance with which an indicator light makes an indication of the power generation rate being increased by the forth function.

Claims

1. A vehicle-use battery monitor apparatus, comprising:

a first function of receiving a power generation rate indicative of an operating state of a vehicle alternator driven by a vehicle engine mounted on a vehicle from a power generation control device mounted on said vehicle alternator to control an output of said vehicle alternator;

a second function of detecting a charge/discharge current of a vehicle battery charged by said vehicle alternator;

a third function of transmitting said power generation rate to an electronic control unit for controlling an output power of said vehicle engine in order that an idle-up control is performed depending on a value of said power generation rate;

a fourth function of increasing said value of said power generation rate to be transmitted to said electronic control unit when it is determined that said vehicle battery is in a discharge state on the basis of a detection result by said second function; and

a fifth function of generating a notification signal in accordance with which an indicator light makes an indication of said power generation rate being increased by said forth function.

2. The vehicle-use battery monitor apparatus according to claim 1, wherein, when said power generation rate is increased by said fourth function, said power generation rate is transmitted to said electronic control unit from said third function after said indicator light makes said indication.

3. The vehicle-use battery monitor apparatus according to claim 1, wherein said indicator light is driven to make said indication by said power generation control device, said notification signal being transmitted from said vehicle-use battery monitor apparatus to said power generation control device.

4. The vehicle-use battery monitor apparatus according to claim 1, further comprising a sixth function of driving said indicator light in accordance with said notification signal.

5. The vehicle-use battery monitor apparatus according to claim 1, wherein said indicator light is driven to make said indication by said electronic control unit, said notification signal being transmitted to said electronic control unit from said vehicle-use battery monitor apparatus.

6. The vehicle-use battery monitor apparatus according to claim 1, wherein said indication is made by causing said indicator light to blink, darken, gradually lighten, or gradually darken.

7. The vehicle-use battery monitor apparatus according to claim 1, wherein a luminescent color of said indicator light is different from red.

8. The vehicle-use battery monitor apparatus according to claim 1, wherein said vehicle battery is determined to be in a discharge state when a discharge current of said vehicle battery detected by said second function is larger than a predetermined threshold current which is smaller than an operating current of an air conditioning apparatus mounted on said vehicle.

9. The vehicle-use battery monitor apparatus according to claim 1, further comprising a sixth function of determining a load response control time which defines a time period needed for completion of increase of said power generation rate by said fourth function such that said load response control time becomes longer as a discharge current of said vehicle battery detected by said second function increases,

said sixth function transmitting said load response control time to said power generation control device in order that an increase rate of a power generation amount of said vehicle alternator is controlled in accordance with said load response control time.

10. The vehicle-use battery monitor apparatus according to claim 1, further comprising a sixth function of detecting an increase rate of a rotation speed of said vehicle alternator, and a seventh function of determining a load response control time which defines a time period needed for completion of increase of said power generation rate by said fourth function such that said load response control time becomes longer as said increase rate of said rotation speed of said vehicle alternator detected by said sixth function increases,

said seventh function transmitting said load response control time to said power generation control device in order that an increase rate of a power generation amount of said vehicle alternator is controlled in accordance with said load response control time.

11. The vehicle-use battery monitor apparatus according to claim 1, further comprising a sixth function of detecting a temperature of said vehicle battery, and a seventh function of determining a load response control time which defines a time period needed for completion of increase of said power generation rate by said fourth function such that said load response control time becomes longer as a temperature of said vehicle battery detected by said sixth function lowers,

said seventh function transmitting said load response control time to said power generation control device in order that an increase rate of a power generation amount of said vehicle alternator is controlled in accordance with said load response control time.

12. The vehicle-use battery monitor apparatus according to claim 11, wherein said second function and said sixth function are located near said vehicle battery, and transmission of said power generation rate and said load response control time between said vehicle-use battery monitor apparatus and said power generation control device is performed through digital communication.