Integrated battery cycle counter

• US 5,117,173 A
• Filed: 02/22/1991
• Issued: 05/26/1992
• Est. Priority Date: 02/22/1991
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Oliva, Elio J., Hawkins, Lilbert S. III, Meadows, Vernon
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): KINCAID, KRISTINE LYNN
• Application Number:
  US07/658,811
• Time in Patent Office: 459 Days
• Field of Search: 320/21, 320/43, 320/48, 320/44, 324/426, 324/427, 340/636
• US Class Current: 320/127
• 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 10/48 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

A battery cycle counter comprises a rechargeable battery having supply and charger contacts, a circuit for providing an input signal when the rechargeable battery is being charged, and a counter powered by the battery and responsive to the input signal which increments a cycle count. The counter has input and output ports. An analog output circuit coupled to the counter output ports provides a unique analog output signal indicative of said cycle count.

Claims

1. A battery cycle counter, comprising:

a rechargeable battery having supply and charger contacts;

circuit means for providing an input signal when said rechargeable battery is being charged;

a counter means responsive to said input signal which increments a cycle count, said counter means having input and output ports; and

analog output means comprising a parallel impedance network coupled to said counter means output ports for providing a unique analog output signal indicative of said cycle count.

2. The battery cycle counter of claim 1, wherein said counter means, circuit means, and said analog output means are implemented into an integrated circuit.

3. The battery cycle counter of claim 1, wherein said counter means comprises a CMOS 12-Bit Binary Counter powered by said rechargeable battery and alternatively powered by a second battery.

4. The battery cycle counter of claim 1, wherein said circuit means comprises a comparator having an output and an input, said comparator output being coupled to the input port of said counter means and said comparator input being coupled to the charger contacts of said battery, said comparator further having a capacitor coupled between said input of said comparator, a first resistor coupled between the capacitor and a battery positive supply contact, and a second resistor coupled between the capacitor and a battery negative supply contact.

5. The battery cycle counter of claim 1, wherein said battery cycle counter further comprises an indicator means coupled to said output port for displaying the status of said cycle count.

6. The battery cycle counter of claim 5, wherein said indicator means comprises a liquid crystal display coupled to the output of said counter means.

7. The battery cycle counter of claim 5, wherein said indicator means comprises an electrically sensitive color changing element.

8. The battery cycle counter of claim 1, wherein said battery cycle counter is encased within a housing.

9. The battery cycle counter of claim 1, wherein said analog output means comprises a parallel resistive network coupled to the output ports of said counter means.

10. A battery cycle counter, comprising:

A rechargeable battery having positive and negative supply and charger contacts;

pulse input means coupled to said charger contacts for providing a pulse input signal;

counting means coupled between said negative supply contact and said negative charger contact and responsive to said pulse input means, for counting the number of times said battery has been recharged, said counting means having at least one input port for receiving said pulse input signal and at least one output port; and

a parallel impendance network coupled to the output ports of said counting means for providing an analog output signal indicative of the number of times said battery has been recharged.

11. The battery cycle counter of claim 10, wherein said battery cycle counter further comprises an indicator means coupled to said output port for displaying said cycle count.

12. The battery cycle counter of claim 11, wherein said pulse input means, counting means, and said parallel impedance network are implemented into an integrated circuit.

13. The battery cycle counter of claim 11, wherein said counting means comprises a CMOS 12-bit binary counter.

14. The battery cycle counter of claim 10, wherein said pulse input means comprises a comparator having input ports coupled to said charger contacts and an output port coupled to said counting means.

15. The battery cycle counter of claim 10, wherein said counting means is powered by a second battery.

16. A battery cycle meter for reading a cycle count from a battery, comprising:

a power supply;

a mirror counter means powered by said power supply for mirroring said cycle count provided by a battery cycle counter;

a switch coupled to said mirror counter means, which is activated when said battery is placed in said battery cycle meter;

a comparator circuit that switches on when said mirror counter means mirrors said cycle count;

count data means for providing said cycle count to a display when said comparator is switched on.

17. The battery cycle meter of claim 16, wherein mirror counter means comprise a CMOS counter coupled to a resistive network.

18. The battery cycle meter of claim 16, wherein said count data means comprises data lines coupled to the outputs of said mirror counter means for providing the cycle count to a display when said comparator circuit is enabled.

19. The battery cycle meter of claim 16, wherein said comparator circuit comprises of a comparator coupled to a D flip-flop.

20. The battery cycle meter of claim 16, wherein said display comprises an LED display driver and an LED display.

21. The battery cycle meter of claim 16, wherein said battery cycle meter is a portable product.

22. The battery cycle meter of claim 16, wherein said battery cycle meter resides within a battery charger.

23. The battery cycle meter of claim 16, wherein said battery cycle meter resides within a battery analyzer.

24. A battery cycle monitoring system, comprising:

in a battery assembly;

a rechargeable battery having supply and charger contacts;

circuit means for providing an input signal when said rechargeable battery is being charged;

a counter means powered by said battery and responsive to said input signal which increments a cycle count, said counter means having input and output ports; and

analog output means coupled to said counter output ports for providing a unique analog output signal indicative of said cycle count.

in a battery assembly receiving device;

a power supply;

a mirror counter means for mirroring said cycle count provided by said battery;

a comparator circuit which provides an enable signal when said mirror counter means mirrors said cycle count;

count data means for providing said cycle count to a display when said comparator provides an enable signal.

25. The battery cycle monitoring system of claim 24, wherein said battery receiving device comprises a charger.

26. The battery cycle monitoring system of claim 24, wherein said battery receiving device comprises a battery conditioner.

27. The battery cycle monitoring system of claim 24, wherein said comparator circuit comprises a comparator coupled to a D Flip-Flop.