Charging protection method, terminal, and charger
AssigneeHuawei Technologies Co., Ltd.
InventorsFenwei Zhang, Haitao Tian
Life of this patent
Estimating the term…
Abstract
A terminal obtains a parameter from a charger, including at least one of an input voltage value and an output current value of the charger and a temperature value of a charging output port of the charger. When a parameter value is greater than a threshold, the terminal terminates a charging process based on a relationship between a corresponding threshold and at least one of a difference between the output current value of the charger and an input current value of the terminal, a power loss from the charger to the terminal, and a temperature value.
Claims9
A charging protection method for a process in which a charger charges a terminal, comprising:
- receiving, by the terminal and from the charger, an output voltage value and an output current value of the charger;
- measuring, by the terminal, an input voltage value of the terminal;
- measuring, by the terminal, a voltage value on both ends of a battery of the terminal;
- measuring, by the terminal, a current value of the battery of the terminal;
- obtaining, by the terminal, a power loss in the process in which the charger charges the terminal, by calculating Pc=(Ua−Ub)×Ia+(Ub−Ubattery)×Ibattery, wherein Pc is the power loss, Ua is the output voltage value of the charger, Ub is the input voltage value of the terminal, Ia is the output current value of the charger, Ubattery is the voltage value on both ends of the battery of the terminal, and Ibattery is the current value of the battery of the terminal, and wherein both the Ubattery and the Ibattery are related to a mainboard cable impedance of the terminal, and the Ibattery and the Ia are different;
- and
- based on the power loss being greater than a protection power threshold, terminating, by the terminal, the process in which the charger charges the terminal.
A terminal, comprising:
- a receiver, configured to obtain an output current value and an output voltage value of a charger in a process in which the charger charges the terminal;
- at least one processor;
- and
- one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
- measure an input voltage value of the terminal;
- measure a voltage value on both ends of a battery of the terminal;
- measure a current value of the battery of the terminal;
- obtain a power loss in the process in which the charger charges the terminal, by calculating Pc=(Ua−Ub)×Ia+(Ub−Ubattery)×Ibattery, wherein Pc is the power loss, Ua is the output voltage value of the charger, Ub is the input voltage value of the terminal, Ia is the output current value of the charger, Ubattery is the voltage value on both ends of the battery of the terminal, and Ibattery is the current value of the battery of the terminal, and wherein both the Ubattery and the Ibattery are related to a mainboard cable impedance of the terminal, and the Ibattery and the Ia are different;
- and
- based on the power loss being greater than a protection power threshold, terminate the process in which the charger charges the terminal.
The terminal according to 41, wherein the one or more memories storing programming instructions for execution by the at least one processor to:
- send a current obtaining request to the charger before receiving the output voltage value and the output current value of the charger.
Dependencies are inferred from the claim text.