# US 10,122,205 B2 · Systems and methods for adaptive charge termination > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,205 B2 - Document ID: US10122205B2 - Status: Granted - Kind: B2 - Application number: 14/976,210 - Filed: 2015-12-21 - Published: 2017-06-22 - Granted: 2018-11-06 - Earliest claimed: 2015-12-21 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Naoki Matsumura; Andrew W. Keates; Krishnan Ravichandran - Web page: https://patentgrep.com/patent/US10122205B2 ## CPC - H02J 7/35: with light sensitive cells - H02J 7/82: Control of state of charge [SOC] - H02J 7/84: Control of state of health [SOH] - H02J 7/855: {with circuits adapted for supplying loads from the battery} - H02J 7/96: in response to battery voltage - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A system for increasing the life of a battery cell by limiting the charging of the battery to less than full charge in response to a predicted electricity draw of a connected device being less than the full capacity of the battery before a predicted recharge will occur. The current draw of the connected device may be affected by the amount of time before a next recharge and environmental factors. The system may further comprise one or more sensors to gather data pertaining to environmental conditions that may be used in the calculation of a charge termination value. The charge termination value is an amount of charge to power the device for a duration of time at least until a predicted recharge begins. ## Claims ### Claim 1 A battery system, comprising: a battery cell for storing energy to power a device; at least one sensor to gather data pertaining to one or more environmental conditions; a processor to receive and process the data pertaining to one or more environmental conditions to calculate a charge termination value for the battery cell, wherein the charge termination value comprises at least an amount of charge estimated to power the device for a period of time beginning at a predicted termination of a first recharging period and ending at a predicted beginning of a second recharging period; a power source to provide energy to the battery cell; and a charge regulator to limit an amount of energy stored by the battery cell to the charge termination value. ### Claim 2 (depends on 1) The battery system of claim 1, wherein the device comprises a sensor node. ### Claim 3 (depends on 1) The battery system of claim 1, wherein the charge termination value is calculated by making adjustments based at least on environmental conditions to a maximum necessary charge value, the maximum necessary charge value being the amount of charge to be used by the device during a longest predicted duration of time between recharges. ### Claim 4 (depends on 1) The battery system of claim 1, wherein the charge termination value is calculated by making adjustments based at least on environmental conditions to a maximum necessary charge value, the maximum necessary charge value being the amount of charge to be used by the device during a longest measured duration of time between recharges. ### Claim 5 (depends on 1) The battery system of claim 1, wherein the battery cell comprises a lithium-ion battery. ### Claim 6 (depends on 1) The battery system of claim 1, wherein the at least one sensor comprises one or more of a photovoltaic cell, a solar cell, a thermocouple, and a wireless communication device. ### Claim 7 (depends on 1) The battery system of claim 1, wherein one or more of the at least one sensor gathers data pertaining to environmental conditions from a data source distant from the sensor. ### Claim 8 (depends on 1) The battery system of claim 1, wherein the environmental conditions comprise one or more of temperature, sunlight intensity, weather forecast, humidity, and night length. ### Claim 9 (depends on 1) The battery system of claim 1, wherein the charge termination value is calculated daily. ### Claim 10 (depends on 1) The battery system of claim 1, wherein the charge termination value is calculated as one or more of a percentage of a total charge capacity of the battery cell and voltage equivalent to a percentage. ### Claim 11 (depends on 10) The battery system of claim 10, wherein the charge termination value accounts for the degradation of the battery cell. ### Claim 12 (depends on 10) The battery system of claim 10 wherein the charge termination value is calculated as a percentage of battery charge capacity using the equation: Hn/H0×Y×1/Z×100%, wherein Hn is the number of hours in the predicted duration of time between recharges following the current day at the power supply's location, wherein H0 is the number of hours in the longest predicted duration of time between recharges, wherein Y is a coefficient based on environmental conditions such that Y is greater than 1 when environmental conditions cause one or more of additional energy consumption by the device than under ideal environmental conditions and decreased energy provided to the battery cell by the power supply, and wherein Z is a coefficient based on battery cell degradation such that when the battery cell has decreased in charge capacity from degradation, Z represents the fraction of a current battery cell charge capacity divided by an original battery cell charge capacity. ### Claim 13 (depends on 1) The battery system of claim 1, further comprising a coulomb counter to measure the total amount of charge added to the battery cell during recharge or lost during discharge. ### Claim 14 (depends on 13) The battery system of claim 13, wherein the charge termination value is calculated as a total amount of electric charge contained in the battery cell. ### Claim 15 (depends on 1) The battery system of claim 1, wherein the power supply comprises a photovoltaic cell. ### Claim 16 (depends on 1) The battery system of claim 1, further comprising a computer chip configured to execute computer executable code for delivering a command to the charge regulator to disrupt energy flow from the power supply to the battery cell once the charge termination value is stored in the battery cell. ### Claim 17 (depends on 16) The battery system of claim 16, wherein the charge regulator comprises a logic gate. ### Claim 18 (depends on 1) The battery system of claim 1, wherein the charge termination value includes a reserve charge, the reserve charge being an amount of charge in excess of the least amount of charge necessary to power the device for a duration of time until a predicted recharge begins. ### Claim 19 A method for charging a battery cell comprising: deriving a charge termination value comprising: using at least one sensor to measure one or more environmental conditions; and using a processor to receive and process data from the at least one sensor to calculate the charge termination value for the battery cell, wherein the charge termination value comprises at least an amount of charge estimated, accounting for the one or more environmental conditions, to power the device for a period of time beginning at a predicted termination of a first recharging period and ending at a predicted beginning of a second recharging period; and providing charge to the battery cell comprising: using a power supply to provide energy to the battery cell; and using a charge regulator to prevent energy from being provided to the battery cell when the charge of the battery cell exceeds the charge termination value. ### Claim 20 (depends on 19) The method of claim 19, wherein the regulator permits energy to be provided to the battery cell when a charge level of the battery cell is less than the charge termination value. ### Claim 21 (depends on 19) The method of claim 19, wherein the regulator permits the power supply to provide sufficient energy to the battery cell to maintain a charge level of the battery cell within 10 percent of the charge termination value. ### Claim 22 (depends on 19) The method of claim 19, wherein the battery cell provides electricity to power at least one sensor. ### Claim 23 An electronic device comprising: at least one sensor to collect environmental data of an environment; a first data store for storing environmental data; a second data store for keeping battery performance history; a processor for accessing the data store and processing the environmental data to derive a charge termination value, wherein the charge termination value comprises at least an amount of charge necessary to power the electronic device for a period of time beginning at a predicted termination of a first recharging period and ending at a predicted beginning of a second recharging period; a battery cell for storing energy; a power supply for providing energy to the battery cell, wherein an amount of power provided by the power supply varies based upon a current state of the environment; and a charge regulator for limiting an amount of power provided by the power supply to prevent the battery cell from storing more energy than the charge termination value. ### Claim 24 (depends on 23) The electronic device of claim 23, wherein the first data store and the second data store are comprised in one computer component. ### Claim 25 (depends on 23) The electronic device of claim 23, wherein the derivation of the charge termination value occurs during the first recharging period.