In-cell battery management device
View Patent ↗Various embodiments relate to an in-cell battery management device including: an integrated circuit (IC) including a controller, a resistive balancer, a voltage sensor, and a pressure sensor; and an IC package that encloses the IC having a hole over the pressure sensor wherein the hole allows the pressure sensor to measure pressure in a battery cell; wherein the IC package is contact with the battery cell.
1. An in-cell battery management device comprising:
an integrated circuit (IC) including a controller, a resistive balancer, a voltage sensor, and a pressure sensor, wherein the pressure sensor is integrated as a top portion of the IC; and
an IC package that encloses the IC having a hole over the pressure sensor wherein the hole exposes the pressure sensor to an inside of a battery cell and allows the pressure sensor to measure pressure within the battery cell, the IC package mounted to a top portion of the battery cell, the top portion having battery electrodes of the battery cell;
wherein the IC package is in contact with the battery cell.
2. The device of claim 1 , wherein the IC includes at least one of a temperature sensor and an impedance spectroscope.
3. The device of claim 2 , wherein the controller analyzes temperature, voltage, and pressure measurement data to determine the state of health of the battery cell.
4. The device of claim 2 , wherein the controller logs measurement data and monitors battery cell performance trends based upon the logged measurement data.
5. The device of claim 1 , wherein the IC further comprises:
a transmitter/receiver connected to the controller that transmits battery cell data;
an input port connected to the transmitter/receiver configured to connect to an output port of another in-cell battery management device; and
an output port connected to the transmitter/receiver configured to connect to an input port of another in-cell battery management device.
6. The device of claim 5 , wherein the input and output ports each include two terminals to provide a differential output signal.
7. The device of claim 5 , wherein the input and output ports each include only a single terminal.
8. The device of claim 1 , further comprising a protective coating over the IC package and an exposed portion of the pressure sensor that protects against the battery cell environment.
9. The device of claim 1 , wherein the controller switches off the battery cell based upon a monitored trend.
10. The device of claim 1 , wherein the top portion of the battery cell comprises a lid, the IC is mounted on the lid of the battery cell or integral to the lid of the battery cell.
11. The device of claim 1 , wherein the pressure sensor is integral with a readout circuit.
12. The device of claim 1 , wherein the pressure sensor is wirelessly coupled to the IC.