System for exchanging information in a battery mailbox

• US 5,625,291 A
• Filed: 05/16/1995
• Issued: 04/29/1997
• Est. Priority Date: 05/16/1995
• Status: Expired due to Fees

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Hewlett-Packard Company (HP Inc.)
• Inventors: Ochs, Dennis E., Andrews, Jonathan N., Benvegar, Carl E., Brink, Gregory D.
• Primary Examiner(s): O'Shea, Sandra L.
• Assistant Examiner(s): Mah, Raymond Y.
• Application Number:
  US08/442,435
• Time in Patent Office: 714 Days
• Field of Search: 324/427, 324/426, 324/435, 320/48, 320/39, 320/43, 320/5, 340/636, 364/481
• US Class Current: 324/427
• 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: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10S 320/13 Fault detection

Abstract

A system having a battery, a battery support unit, and an electronic device provides for the exchange of information between the battery support unit and the electronic device via a mailbox in memory in the battery. When the battery is placed in the battery support unit, the battery support unit tests the battery for an error condition. If the battery support unit finds an error condition with the battery, it transmits error data to a mailbox located in the battery'"'"'s memory. When the battery is then removed from the battery support unit and placed in an electronic device, the electronic device can read the error data in the mailbox and take an appropriate action. For example, the electronic device reads the mailbox and find the error data placed there by the battery support unit. In response to finding this error data, the electronic device enables an indicator, such as an indicator that informs a user that maintenance needs to be performed on the battery. The user can continue using the battery, knowing that its operation is likely to be unreliable, or can remove it from the electronic device and insert it into the battery support unit for maintenance. When battery maintenance has been selected, the battery support unit reconditions the battery by performing a predetermined number of charge/discharge cycles, and also performs additional testing on the battery.

Claims

1. A method of exchanging information amongst components of a battery system comprising a battery, a battery support unit for testing said battery and an electronic device powered by said battery, said battery having storage cells and a battery memory, said method comprising the steps of:

placing said battery in said battery support unit;

said battery support unit testing said battery for a first error condition;

said battery support unit detecting a first error condition in said battery;

said battery support unit transmitting first error data to a mailbox located in said battery memory, responsive to said detecting said first error condition step;

removing said-battery from said battery support unit;

placing said battery in said electronic device;

said electronic device reading said first error data in said mailbox located in said battery memory; and

said electronic device enabling a first indicator in response to said reading said first error data step.

2. The method of claim 1, further comprising the steps of:

said electronic device testing said battery for a second error condition;

said electronic device detecting a second error condition in said battery;

said electronic device transmitting second error data to said mailbox located in said battery memory, responsive to said detecting a second error condition step;

removing said battery from said electronic device;

placing said battery in said battery support unit;

said battery support unit reading said second error data in said mailbox located in said battery memory;

said battery support unit enabling a second indicator in response to said reading said second error data.

3. The method of claim 2, wherein said second indicator instructs a user to perform maintenance on said battery.

4. The method of claim 1, further comprising the step of:

reading battery determined battery capacity data placed in said battery memory by said battery.

5. The method of claim 4, further comprising the step of:

comparing said battery determined .battery capacity data with support unit determined battery capacity data.

6. The method of claim 5, further comprising the step of:

charging said battery.

7. The method of claim 5, further comprising the steps of:

detecting that maintenance for said battery has been selected;

charging and discharging said battery a predetermined number of times.

8. A battery system, comprising:

a battery, further comprising;

storage cells;

a battery memory;

communications logic;

a battery support unit for testing said battery, further comprising;

a support unit processor further comprising battery test logic;

an electronic device powered by said battery, further comprising;

a device processor further comprising battery monitor logic;

device circuitry connected to said device processor

wherein said battery test logic;

tests said battery for a first error condition;

detects a first error condition in said battery;

transmits first error data to a mailbox located in said battery memory, responsive to detecting said first error condition;

wherein said battery monitor logic;

reads said first error data in said mailbox located in said battery memory; and

enables a first indicator in response to reading said first error data.

9. The system of claim 8, wherein said battery monitor logic:

monitors said battery for a second error condition;

detects a second error condition in said battery;

transmits second error data to said mailbox located in said battery memory, responsive to detecting a second error condition;

wherein said battery test logic;

reads said second error data in said mailbox located in said battery memory; and

enables a second indicator in response to reading said second error data.

10. The system of claim 8, wherein said battery support unit further comprises:

charger circuitry connected to said device processor.

11. The system of claim 9, wherein said second indicator instructs a user to perform maintenance on said battery.

12. The system of claim 10, wherein said first error condition is a battery too hot condition.

13. The system of claim 10, wherein said first error condition is a battery too cold condition.

14. The system of claim 10 wherein said first error condition is a battery voltage too high condition.

15. The system of claim 10, wherein said first error condition is a battery voltage too low condition.

16. The system of claim 10, wherein said first error condition is a battery support unit timeout condition.

17. The system of claim 10, wherein said first error condition is a battery capacity out of range condition.

18. The system of claim 10, wherein said battery test logic reads battery determined battery capacity data placed in said battery memory by said battery.

19. The system of claim 18, wherein said battery test logic compares said battery determined battery capacity data with support unit determined battery capacity data.

20. The system of claim 19, wherein said first error condition is a battery capacity inaccurate condition.

21. The system of claim 20, wherein said second error condition is a battery voltage out of range condition.

22. The system of claim 21, wherein said processor further comprises battery maintenance logic, wherein said battery maintenance logic:

detects that maintenance for said battery has been selected;

charges and discharges said battery a predetermined number of times.