Battery field disconnect method

Patent metadata

Field	Value
Publication number	US-9941550-B2
Application number	US-201214396004-A
Country	US
Kind code	B2
Filing date	Apr 23, 2012
Priority date	Apr 23, 2012
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

Embodiments are directed to an apparatus comprising terminals providing a voltage, a monitor configured to receive an input from an entity external to the apparatus indicating that energy associated with the apparatus is to be selectively coupled to, or isolated from the terminals, and a protection mechanism coupled to the monitor and configured to be selectively turned on and turned off based on the input received from the external entity.

First claim

What is claimed is:

1. An apparatus comprising:
terminals providing a voltage;
a fuse;
a monitor configured to receive an input indicating that energy associated with the apparatus is to be selectively coupled to, or isolated from the terminals; and
a protection mechanism coupled to the monitor and configured to be selectively turned on and turned off based on the input;
wherein the monitor is configured to:
responsive to receiving the input indicating the apparatus is to be isolated from the terminals, measure at least one parameter associated with the protection mechanism;
cause the fuse to be activated when the measured at least one parameter exceeds a threshold; and
convey a message regarding a status of the measured at least one parameter, wherein the status includes an indication of whether the fuse was activated.

2. The apparatus of claim 1 , wherein the monitor and the protection mechanism are included in the apparatus when the apparatus is manufactured.

3. The apparatus of claim 1 , wherein the protection mechanism comprises a plurality of MOSFETs arranged in a blocking format.

4. The apparatus of claim 3 , further comprising:
a drive coupled to the monitor and the MOSFETs and configured to bias a gate of each of the plurality of MOSFETs based on an input received from the monitor.

5. The apparatus of claim 1 , further comprising:
a plurality of cells arranged as a battery,
wherein the energy is provided by the battery.

6. The apparatus of claim 1 , wherein the apparatus is associated with an elevator, and wherein the input is associated with at least one of a service activity, a maintenance activity, and an installation activity with respect to the elevator.

7. A method comprising:
receiving, by a monitor included in an apparatus, an input to the apparatus indicating that energy associated with a battery of the apparatus is to be isolated from terminals of the apparatus; and
causing, by the monitor, a protection mechanism to be driven to a state that isolates the energy from the terminals responsive to receiving the input;
measuring, by the monitor, at least one parameter associated with the protection mechanism;
wherein when the measured at least one parameter exceeds a threshold, the monitor is configured to cause a fuse coupled to the terminals of the apparatus to activate; and
wherein the monitor is configured to convey a message regarding a status of the measured at least one parameter, wherein the status includes an indication of whether the fuse was activated.

8. The method of claim 7 , wherein the monitor and the protection mechanism are included in the apparatus when the apparatus is manufactured.

9. The method of claim 7 , wherein the protection mechanism comprises a plurality of transistors arranged in a blocking format and coupled to the battery and the terminals, the method further comprising:
causing, by the monitor, at least one of the transistors to be turned off to isolate the energy associated with the battery from the terminals.

10. The method of claim 7 , wherein the apparatus is associated with an elevator, and wherein the input is associated with at least one of a service activity, a maintenance activity, and an installation activity with respect to the elevator.

11. A method comprising:
receiving, by a monitor included in an apparatus, an input to the apparatus indicating that energy associated with a battery of the apparatus is to be coupled to terminals of the apparatus;
determining that a fuse coupled to the terminals of the apparatus is closed;
based at least in part on the determination that the fuse is closed, causing, by the monitor, a protection mechanism to be driven to a state that couples the energy to the terminals responsive to receiving the input.

12. The method of claim 11 , wherein the protection mechanism comprises a plurality of transistors arranged in a blocking format and coupled to the battery and the terminals, the method further comprising:
causing, by the monitor, each of the transistors to be turned on to couple the energy associated with the battery to the terminals.

13. The method of claim 10 , wherein the apparatus is associated with an elevator, and wherein the input is associated with at least one of a service activity, a maintenance activity, and an installation activity with respect to the elevator.

14. A system comprising:
a controller configured to receive an input that selectively indicates whether energy associated with a battery is to be coupled to terminals associated with the battery;
a fuse coupled to the terminals associated with the battery;
a monitor coupled to the controller and configured to receive a signal from the controller that indicates whether the energy is to be coupled to the terminals based on the input; and
a protection mechanism coupled to the monitor and configured to be driven by the monitor so as to selectively couple the energy to the terminals based on the signal;
wherein the monitor is configured to:
responsive to receiving the input indicating the energy is to be coupled to the terminals, determine that the fuse is closed;
based at least in part on the determination that the fuse is closed, causing the protection mechanism to be driven to a state that couples the energy to the terminals.

15. The system of claim 14 , wherein the battery is a lithium ion battery, and wherein the monitor and the protection mechanism are included in a lithium ion battery management system of the lithium ion battery when the lithium ion battery is manufactured, and wherein the lithium ion battery management system is used to protect the lithium ion battery when the lithium ion battery is shipped.

16. The system of claim 14 , wherein the monitor is configured to measure a parameter associated with the protection mechanism, and wherein the monitor is configured to convey a message to the controller that provides a status of whether the energy is coupled to the terminals, and wherein the controller is configured to provide the status associated with the message as at least one of: an email, a text message, an instant message, a voicemail, a phone call, and a graphic displayed on a display screen.

Assignees

• Rogers Kyle W
• Otis Elevator Co

Inventors

• Rogers Kyle W

Classifications

• H01M10/488

  Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density · CPC title

• H02H3/05 Primary

  with means for increasing reliability, e.g. redundancy arrangements {(for logic circuits H03K19/003)} · CPC title

• H02H7/18

  for batteries; for accumulators · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• H01M10/4257 Primary

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title