Application US20190126774

COMMUNICATION SYSTEM FOR BATTERY MANAGEMENT SYSTEMS IN ELECTRIC OR HYBRID VEHICLES
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US20190126774

1-30. (canceled) (0)

31. A circuit comprising: (5) (3)

a controller area network (CAN) bus; and

a plurality of nodes each storing a node identifier,

wherein each of the plurality of nodes is configured to send messages over the CAN bus during its assigned periodic time slot and not during other time slots.

32. The circuit of claim 31, wherein each of the plurality of nodes is configured to determine its assigned periodic time slot from an initial time that depends on a reboot time for the plurality of nodes. (2) (0)

35. The circuit of claim 31, wherein the plurality of nodes is configured to synchronize a timing for sending the messages. (2) (0)

38. The circuit of claim 31, wherein one of the plurality of nodes is configured to: (1) (2)

40. The circuit of claim 31, further comprising a galvanic isolation between one of the plurality of nodes and the CAN bus. (3) (0)

46. The circuit of claim 31, wherein one of the plurality of nodes comprises a battery management system configured to monitor one or more battery cells in a battery pack. (1) (0)

48. A method for sharing a controller area network (CAN) bus between a plurality of nodes, wherein a node identifier is assigned to each of the plurality of nodes, the method comprising: (4) (3)

dividing a CAN channel into a plurality of periodic time slots;

assigning one of the plurality of periodic time slots to each node; and

sending, by each of the plurality of nodes, messages during its assigned periodic time slot and not during other time slots.

49. The method of claim 48, further comprising synchronizing a timing of the plurality of nodes for sending the messages. (1) (0)

50. The method of claim 49, wherein said synchronizing comprises: (1) (2)

powering the plurality of nodes at a common power-on time; and

synchronizing the plurality of nodes relative to the common power-on time.

51. The method of claim 50, further comprising: (1) (2)

53. The method of claim 48, further comprising setting a reboot time at boot of the plurality of nodes, and wherein said assigning comprises assigning individual time slots of the plurality of periodic time slots to the plurality of nodes based at least on the reboot time and the node identifiers assigned to the plurality of nodes. (0)

54. The method of claim 48, further comprising monitoring, by a battery management system of one of the plurality of nodes, one or more battery cells in a battery pack. (0)

55. The method of claim 48, further comprising rebooting, by a central monitoring unit, the plurality of nodes at least once every first time duration. (0)

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Application US20190126774

COMMUNICATION SYSTEM FOR BATTERY MANAGEMENT SYSTEMS IN ELECTRIC OR HYBRID VEHICLES

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