# US 10,122,193 B2 · Portable device and method for controlling charging current thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,193 B2 - Document ID: US10122193B2 - Status: Granted - Kind: B2 - Application number: 14/286,500 - Filed: 2014-05-23 - Published: 2015-11-26 - Granted: 2018-11-06 - Earliest claimed: 2014-05-23 - Assignees: HTC Corporation - Applicants: HTC Corporation - Inventors: Shih-Ping Lin - Web page: https://patentgrep.com/patent/US10122193B2 ## CPC - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H02J 7/731: {specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence)} - H02J 7/975: {in response to temperature} - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A portable device is provided. The portable device includes a battery unit, a charger circuit, a detecting unit and a processing unit. The charger circuit provides a charging current to charge the battery unit according to an input power and adjusts the charging current to a charging value according to a first control signal. The detecting unit detects and obtains an instantaneous operating current, an instantaneous charging current and a system temperature in the portable device. The processing unit provides the first control signal according to the instantaneous operating current, the instantaneous charging current and the system temperature. ## Claims ### Claim 1 A portable device, comprising: a battery unit; a charger circuit configured to provide a charging current to charge the battery unit according to an input power and to adjust the charging current to a charging value according to a first control signal; a detecting unit configured to detect and obtain an operating current consumed by the portable device, the charging current provided to the battery unit, and a system temperature in the portable device; and a processing unit configured to provide the first control signal according to the operating current, the charging current and the system temperature when the system temperature is between a first temperature value and a second temperature value higher than the first temperature value, so as to adjust the charging current to the charging value in exponential proportion with a first control parameter, wherein the first control parameter is obtained by dividing a first temperature difference by a second temperature difference, and the first temperature difference represents a difference between the second temperature value and the system temperature, and the second temperature difference represents a difference between the second temperature value and the first temperature value, and wherein the first temperature value is a threshold temperature for the processor to determine whether to adjust the charging current to a maximum charging current value, and the second temperature value is an allowable maximum temperature for the processor to determine whether to adjust the charging current to a minimum charging current value. ### Claim 2 (depends on 1) The portable device as claimed in claim 1, wherein the charging value is between a maximum current value and a minimum current value. ### Claim 3 (depends on 2) The portable device as claimed in claim 2, wherein when the system temperature is lower than the first temperature value, the processing unit is further configured to provide a second control signal, and wherein the charger circuit is further configured to adjust the charging current to the maximum current value according to the second control signal. ### Claim 4 (depends on 2) The portable device as claimed in claim 2, wherein when the system temperature is higher than the second temperature value, the processing unit is further configured to provide a second control signal, and wherein the charger circuit is further configured to adjust the charging current to the minimum current value according to the second control signal. ### Claim 5 (depends on 2) The portable device as claimed in claim 2, wherein the charger circuit provides the charging current according to a specific function of the maximum current value and according to the first control signal, wherein the specific function comprises the first control parameter, and the first control parameter is equal to T target - T sys T target - T adj , where Tadj represents the first temperature value, Ttarget represents the second temperature value, and Tsys represents the system temperature. ### Claim 6 (depends on 5) The portable device as claimed in claim 5, wherein the charging current has the maximum current value when the system temperature is lower than the first temperature value, and the charging current has the minimum current value when the system temperature is higher than the second temperature value. ### Claim 7 (depends on 2) The portable device as claimed in claim 2, wherein when the operating current is increased and the system temperature is between the first temperature value and the second temperature value, the processing unit provides the first control signal to the charger circuit, so as to decrease the charging current. ### Claim 8 (depends on 7) The portable device as claimed in claim 7, wherein when the operating current is decreased and the system temperature is between the first temperature value and the second temperature value, the processing unit provides the first control signal to the charger circuit, so as to increase the charging current. ### Claim 9 (depends on 8) The portable device as claimed in claim 8, wherein when the system temperature is lower than the first temperature value, the processing unit is further configured to provide a second control signal to the charger circuit, so as to increase the charging current to the maximum current value, and when the system temperature is higher than the second temperature value, the processing unit is further configured to provide a third control signal to the charger circuit, so as to decrease the charging current to the minimum current value. ### Claim 10 A method for controlling a charging current of a portable device having a battery unit, comprising: providing a charging current according to an input power to charge the battery unit; detecting and obtaining an operating current consumed by the portable device, the charging current provided to the battery unit, and a system temperature in the portable device; providing a first control signal according to the operating current, the charging current and the system temperature when the system temperature is between a first temperature value and a second temperature value higher than the first temperature value; and adjusting the charging current according to the first control signal and a first control parameter, wherein the charging current is adjusted to a charging value in exponential proportion with the first control parameter, wherein the first control parameter is obtained by dividing a first temperature difference by a second temperature difference, and the first temperature difference represents a difference between the second temperature value and the system temperature, and the second temperature difference represents a difference between the second temperature value and the first temperature value, and wherein the first temperature value is a threshold temperature for the processor to determine whether to adjust the charging current to a maximum charging current value, and the second temperature value is an allowable maximum temperature for the processor to determine whether to adjust the charging current to a minimum charging current value. ### Claim 11 (depends on 10) The method as claimed in claim 10, wherein the charging value is between a maximum current value and a minimum current value. ### Claim 12 (depends on 11) The method as claimed in claim 11, further comprising: providing a second control signal when the system temperature is lower than the first temperature value; and adjusting the charging current to the maximum current value according to the second control signal. ### Claim 13 (depends on 11) The method as claimed in claim 11, further comprising: providing a second control signal when the system temperature is higher than the second temperature value; and adjusting the charging current to the minimum current value according to the second control signal. ### Claim 14 (depends on 11) The method as claimed in claim 11, wherein the step of providing the charging current further comprises: providing the charging current according to a specific function of the maximum current value and according to the first control signal, wherein the specific function comprises the first control parameter, and the first control parameter is equal to T target - T sys T target - T adj , where Tadj represents the first temperature value, Ttarget represents the second temperature value, and Tsys represents the system temperature. ### Claim 15 (depends on 14) The method as claimed in claim 14, wherein the charging current has the maximum current value when the system temperature is lower than the first temperature value, and the charging current has the minimum current value when the system temperature is higher than the second temperature value. ### Claim 16 (depends on 11) The method as claimed in claim 11, wherein the step of providing the first control signal further comprises: providing the first control signal when the operating current is increased and the system temperature is between the first temperature value and the second temperature value. ### Claim 17 (depends on 16) The method as claimed in claim 16, wherein the step of providing the first control signal further comprises: providing the first control signal when the charging current is decreased and the system temperature is between the first temperature value and the second temperature value. ### Claim 18 (depends on 17) The method as claimed in claim 17, further comprising: providing a second control signal when the system temperature is lower than the first temperature value; increasing the charging current to the maximum current value according to the second control signal; providing a third control signal when the system temperature is lower than the second temperature value; and decreasing the charging current to the minimum current value according to the third control signal.