Prioritizing supplying electrical power by a power storage adapter to connected devices
A power storage adapter (PSA) may be connected to multiple battery-powered devices. A PSA controller may be configured to receive respective requests to supply electrical power to a first device and a second device, to determine that the power storage adapter does not have sufficient power supply capacity to satisfy both requests, to determine that a respective state of charge (SOC) of at least one device battery is below a first battery SOC threshold, and to prioritize supplying electrical power to a selected one of the devices at the expense of the other device based on a battery charging prioritization policy. The selected device may be prioritized until the battery SOC exceeds a battery SOC threshold or for a predetermined time period. The battery charging prioritization policy may specify relative charging priorities for the device batteries and a PSA battery dependent on whether AC line power is available.
1. A power storage adapter (PSA), comprising:
a plurality of PSA ports;
an AC-DC converter;
a PSA battery; and
a PSA controller having access to memory media storing instructions executable by the PSA controller to:
receive respective requests to supply electrical power to a first battery-powered device at a first PSA port and to a second battery-powered device at a second PSA port, each request specifying a requested amount of electrical power to be supplied by the power storage adapter;
determine that the power storage adapter does not have sufficient power supply capacity to satisfy both requests;
determine that a respective state of charge (SOC) of at least one of a first battery of the first battery-powered device and a second battery of the second battery-powered device is below a first predetermined SOC threshold;
prioritize supplying electrical power to a selected one of the first battery-powered device and the second battery-powered device at the expense of an unselected one of the first battery-powered device and the second battery-powered device dependent on a predetermined battery charging prioritization policy, the state of charge of the selected device being below the first predetermined SOC threshold; and
subsequent to prioritizing supplying electrical power to the selected device, prioritize supplying electrical power to the PSA battery at the expense of the selected device and the unselected device dependent on the predetermined battery charging prioritization policy;
wherein the battery charging prioritization policy specifies relative charging priorities for the first battery, the second battery and the PSA battery, the relative charging priorities being dependent on whether or not the AC-DC convertor is connected to an AC line power source, and prioritizing supplying electrical power to the selected device comprises supplying an amount of electrical power to the unselected device that is less than the electrical power requested for the unselected device.
2. The power storage adapter of claim 1 , wherein prioritizing supplying electrical power to the selected device comprises prioritizing supplying electrical power to the selected device until the state of charge of the battery of the selected device meets or exceeds the first predetermined SOC threshold.
3. The power storage adapter of claim 1 , wherein prioritizing supplying electrical power to the selected device comprises prioritizing supplying electrical power to the selected device until the state of charge of the battery of the selected device meets or exceeds a second predetermined SOC threshold, the second predetermined SOC threshold being higher than the first predetermined SOC threshold.
4. The power storage adapter of claim 1 , wherein prioritizing supplying electrical power to the selected device comprises prioritizing supplying electrical power to the selected device for a predetermined period of time.
5. The power storage adapter of claim 1 , wherein determining that a respective SOC of at least one of the first battery and the second battery is below a first predetermined SOC threshold comprises at least one of:
querying the first battery-powered device to obtain data representing the state of charge of the first battery; and
querying the second battery-powered device to obtain data representing the state of charge of the second battery.
6. The power storage adapter of claim 1 , wherein the instructions are further executable by the PSA controller to:
determine that the state of charge of the unselected device is below the first predetermined SOC threshold; and
subsequent to prioritizing supplying electrical power to the selected device, prioritize supplying electrical power to the unselected device at the expense of the selected device.
7. The power storage adapter of claim 1 , wherein prioritizing supplying electrical power to the selected device comprises supplying an amount of electrical power to the selected device equal to the electrical power requested for the selected device.
8. The power storage adapter of claim 1 , wherein the instructions are further executable by the PSA controller to, subsequent to prioritizing supplying electrical power to the selected device:
determine that the respective state of charge of each of the first battery and the second battery exceeds the first predetermined SOC threshold;
cause the power storage adapter to supply to the first battery-powered device, in accordance with the predetermined battery charging prioritization policy, an amount of electrical power that is less than the electrical power requested for the first battery-powered device; and
cause the power storage adapter to supply to the second battery-powered device, in accordance with the predetermined battery charging prioritization policy, an amount of electrical power that is less than the electrical power requested for the second battery-powered device.
9. The power storage adapter of claim 1 , wherein:
prioritizing supplying electrical power to the PSA battery at the expense of the selected device and the unselected device is performed while the AC-DC converter is connected to an AC line power source.
10. The power storage adapter of claim 1 , wherein:
the first battery-powered device is a portable information handling system;
the first battery is an internal battery of the portable information handling system; and
the battery charging prioritization policy specifies that a charging priority of the internal battery of the portable information handling system is higher than a charging priority of the second battery when the state of charge of the internal battery and the state of charge of the second battery are below the first predetermined SOC threshold.
11. The power storage adapter of claim 1 , wherein the instructions are further executable by the PSA controller to:
determine that a state of charge of the PSA battery is below a predetermined recharging threshold for the PSA battery; and
prioritize supplying electrical power to the PSA battery at the expense of the selected device and the unselected device.
12. A method, comprising:
receiving, by a power source comprising an AC-DC converter and an integrated battery, respective requests to supply electrical power to a first battery-powered device connected to the power source and to a second battery-powered device connected to the power source, each request specifying a requested amount of electrical power to be supplied by the power source;
determining that the power source does not have sufficient power supply capacity to satisfy both requests;
determining that a respective state of charge (SOC) of at least one of a first battery of the first battery-powered device and a second battery of the second battery-powered device is below a first predetermined SOC threshold; and
prioritizing supplying electrical power to a selected one of the first battery-powered device and the second battery-powered device at the expense of an unselected one of the first battery-powered device and the second battery-powered device dependent on a predetermined battery charging prioritization policy, the state of charge of the selected device being below the first predetermined SOC threshold; and
subsequent to prioritizing supplying electrical power to the selected device, prioritizing supplying electrical power to the integrated battery at the expense of the selected device and the unselected device dependent on the predetermined battery charging prioritization policy;
wherein the battery charging prioritization policy specifies relative charging priorities for the first battery, the second battery and the integrated battery, the relative charging priorities being dependent on whether or not the AC-DC converter is connected to an AC line power source, and prioritizing supplying electrical power to the selected device comprises supplying an amount of electrical power to the unselected device that is less than the electrical power requested for the unselected device.
13. The method of claim 12 , wherein prioritizing supplying electrical power to the selected device comprises prioritizing supplying electrical power to the selected device until the state of charge of the battery of the selected device meets or exceeds the first predetermined SOC threshold.
14. The method of claim 12 , wherein prioritizing supplying electrical power to the selected device comprises prioritizing supplying electrical power to the selected device until the state of charge of the battery of the selected device meets or exceeds a second predetermined SOC threshold, the second predetermined SOC threshold being higher than the first predetermined SOC threshold.
15. The method of claim 12 , wherein prioritizing supplying electrical power to the selected device comprises prioritizing supplying electrical power to the selected device for a predetermined period of time.
16. The method of claim 12 , wherein determining that a respective SOC of at least one of the first battery and the second battery is below a first predetermined SOC threshold comprises at least one of:
querying the first battery-powered device to obtain data representing the state of charge of the first battery; and
querying the second battery-powered device to obtain data representing the state of charge of the second battery.
17. The method of claim 12 , wherein:
the state of charge of the unselected device is below the first predetermined SOC threshold; and
the method further comprises, subsequent to prioritizing supplying electrical power to the selected device, prioritizing supplying electrical power to the unselected device at the expense of the selected device.
18. The method of claim 12 , wherein prioritizing supplying electrical power to the selected device comprises supplying an amount of electrical power to the selected device equal to the electrical power requested for the selected device.
19. The method of claim 12 , further comprising, subsequent to prioritizing supplying electrical power to the selected device:
determining that the respective state of charge of each of the first battery and the second battery exceeds the first predetermined SOC threshold;
causing the power source to supply to the first battery-powered device, in accordance with the predetermined battery charging prioritization policy, an amount of electrical power that is less than the electrical power requested for the first battery-powered device; and
causing the power source to supply to the second battery-powered device, in accordance with the predetermined battery charging prioritization policy, an amount of electrical power that is less than the electrical power requested for the second battery-powered device.
20. The method of claim 12 , wherein:
prioritizing supplying electrical power to the integrated battery at the expense of the selected device and the unselected device is performed while the AC-DC converter is connected to an AC line power source.