Multiple primary nodes for wireless battery management system robustness

1 . A system, comprising:

a first plurality of secondary devices, each secondary device of the first plurality of secondary devices including a first wireless transmitter and a battery monitor integrated circuit (IC), the battery monitor IC configurable to obtain battery data from at least one battery cell, and the first wireless transmitter configurable to wirelessly transmit the battery data;

a shared memory configurable to store network data;

a first primary device having a second wireless transmitter configurable to be wirelessly coupled to the first wireless transmitters of the first plurality of secondary devices via a first wireless network using the network data; and

a second primary device including a third wireless transmitter and configurable to:

detect a fault with the first primary device;

retrieve the network data from the shared memory; and

establish a second wireless network with the first plurality of secondary devices using the network data and in response to detecting the fault.

2 . The system of claim 1 , wherein the first primary device is configurable to transmit, to the second primary device, an interrupt signal indicating the fault of the first primary device.

3 . The system of claim 1 , wherein the shared memory is accessible by the first primary device and the second primary device,

wherein the first primary device is configurable to store the network data to the shared memory, and

wherein the second primary device is configurable to access the network data in the shared memory to establish the second wireless network.

4 . The system of claim 1 , wherein the second primary device is configurable to:

periodically monitor transmissions from the first primary device; and

detect the fault with the first primary device upon an absence of an expected transmission from the first primary device.

5 . The system of claim 1 , further comprising a second plurality of secondary devices,

wherein the second primary device is configurable to be wirelessly coupled to the second plurality of secondary devices via a third wireless network before detecting the fault with the first primary device, and

wherein the second primary device is configurable to establish the second wireless network with the first and second pluralities of secondary devices in response to detecting the fault with the first primary device.

6 . The system of claim 5 ,

wherein each secondary device within the first plurality of secondary devices and each secondary device within the second plurality of secondary devices includes a unique identifier, and

wherein the second primary device includes the unique identifiers of the secondary devices of the first and second pluralities of secondary devices.

7 . The system of claim 5 , wherein the second primary device is configurable to allocate an uplink allocation for each secondary device of the first and second pluralities of secondary devices upon establishing the second wireless network.

8 . The system of claim 1 , wherein the second primary device is configurable to:

scan for a packet from the first primary device; and

detect the fault with the first primary device in response to detecting no packets from the first primary device.

9 . The system of claim 1 , wherein the second primary device is coupled to the first primary device via a line, and wherein the second primary device is configurable to:

receive a signal from the first primary device via the line; and

detect the fault with the first primary device based on the received signal.

10 . A system, comprising:

a plurality of battery cells;

a first plurality of secondary devices, each secondary device of the first plurality of secondary devices including a first wireless transmitter and a battery monitor integrated circuit (IC), wherein the battery monitor IC is configurable to be coupled to a subset of the plurality of battery cells, wherein the battery monitor IC is configurable to obtain battery data from the respective subset of battery cells, wherein the first wireless transmitter is configurable to wirelessly transmit the battery data, and wherein the battery data includes voltage data or current data;

a second plurality of secondary devices;

a first primary device having a second wireless transmitter wirelessly configurable to be coupled to the first wireless transmitters of the first plurality of secondary devices via a first wireless network; and

a second primary device having a third wireless transmitter, wherein the second primary device is configurable to:

detect a fault with the first primary device;

establish a second wireless network with the second plurality of secondary devices before detecting the fault with the first primary device; and

establish a third wireless network with the first plurality of secondary devices and the second plurality of secondary devices in response to detecting the fault.

11 . The system of claim 10 , wherein the first primary device is configurable to transmit an interrupt signal to the second primary device to indicate the fault of the first primary device.

12 . The system of claim 10 , further comprising a shared memory accessible by the first primary device and the second primary device,

wherein the first primary device is configurable to store network data corresponding to the first wireless network in the shared memory, and

wherein the second primary device is configurable to access the network data in the shared memory to establish the second wireless network.

13 . The system of claim 12 , wherein the network data includes timing data of the first wireless network.

14 . The system of claim 10 , wherein the second primary device is configurable to detect the fault with the first primary device upon an absence of a transmission from the first primary device.

15 . The system of claim 10 , wherein the second primary device is configurable to:

scan for a packet from the first primary device; and

detect the fault with the first primary device in response to detecting no packets from the first primary device.

16 . A system comprising:

a shared memory configurable to store network data;

a first primary device coupled to the shared memory and configurable to establish a first network using the network data;

a second primary device coupled to the shared memory and configurable to:

detect a fault with the first primary device;

retrieve the network data from the shared memory; and

establish a second network using the network data in response to detecting the fault; and

a plurality of secondary devices, wherein each secondary device of the plurality of secondary devices includes:

a battery monitor integrated circuit (IC) configurable to be coupled to a battery cell; and

a wireless transmitter coupled to the battery monitor IC and configurable to:

transmit first data related to the battery cell to the first primary device; and

transmit second data related to the battery cell to the second primary device,

wherein the second primary device is configurable to establish the second network with the plurality of secondary devices using the network data in response to detecting the fault.

17 . The system of claim 16 , wherein the second primary device is configurable to:

scan for a packet from the first primary device; and

establish the second network with the plurality of secondary devices in response to detecting no packets from the first primary device.

18 . The system of claim 16 , wherein the first primary device is configurable to transmit an interrupt signal to the second primary device to indicate the fault of the first primary device.

19 . The system of claim 16 ,

wherein the shared memory is accessible by the first primary device and the second primary device,

wherein the first primary device is configurable to store the network data in the shared memory, and

wherein the second primary device is configurable to access the network data in the shared memory to establish the second network.

20 . The system of claim 16 , wherein the second primary device is configurable to:

synchronize to the first primary device by tracking the first network of the first primary device;

determine that the first primary device has failed after synchronizing to the first primary device; and

establish the second network with the plurality of secondary devices in response to determining that the first primary device has failed.