Battery system with shipping mode

1. For a battery system including a battery pack and a battery management system, the battery system having battery output terminals, a circuit for alternating the state of the battery system between a connected state, wherein the battery pack is connected to the battery output terminals, and a disconnected state, wherein the battery pack is disconnected from the battery output terminals, the circuit comprising:

a central processing unit;

means electrically disposed between the battery pack and the battery terminals for alternately switching the electrical connection between the battery pack and the battery terminals, between an open electrical connection and a closed electrical connection, under control of the central processing unit; and

a user input device coupled to an input to the central processing unit for producing a user input command;

wherein in response to an actuation of the user input device producing the user input command to the central processing unit, providing an indication in a first manner and initiating a first period of time defining a first time window, the indication in the first manner continuing during the first time window while the user input device remains actuated;

wherein when the user input device has remained actuated upon completion of the first period of time, providing an indication in a second, different manner and initiating a second period of time defining a second time window, the indication in the second manner continuing in the second manner during the second time window while the user input device remains actuated; and

wherein the central processing unit only operates the switching means to alternate the state of the battery system if the user input command is released during the second time window, wherein if the user input command is released during the first time window or upon completion of the second time window, the indication is provided in a third manner different than the second manner and the battery system remains in its initial state.

2. The circuit of claim 1 , wherein the indication is provided as an audible indicator.

3. The circuit of claim 2 , wherein each of the time windows is indicated as a unique audible frequency.

4. The circuit of claim 2 , wherein each of the time windows is indicated as a unique audible volume level.

5. The circuit of claim 1 , wherein the indication is provided as a tactile indicator.

6. The circuit of claim 5 , wherein each of the time windows is indicated as a unique tactile frequency.

7. The circuit of claim 5 , wherein each of the time windows is indicated as a unique tactile amplitude level.

8. The circuit of claim 1 , wherein the indication is provided as a visual indicator.

9. The circuit of claim 8 , wherein each of the time windows is indicated as a unique color.

10. The circuit of claim 8 , wherein each of the time windows is indicated as a unique brightness level.

11. The circuit of claim 8 , wherein the visual indicator comprises a multi-color LED.

12. The circuit of claim 11 , wherein:

illuminating the indicator light in the first manner comprises illuminating the multi-color LED in a first color; and

illuminating the indicator light in the second manner comprises illuminating the multi-color LED in a second, different color.

13. The circuit of claim 1 , wherein the user input device comprises a pushbutton switch.

14. The circuit of claim 1 , wherein the pushbutton switch comprises a normally-open pushbutton switch.

15. The circuit of claim 1 , wherein the switching means comprises an electrically operated switch.

16. The circuit of claim 15 , wherein the electrically operated switch comprises a contactor.