WO2015154377A1 - 大负载终端的电源控制方法及装置、计算机程序及载体 - Google Patents
大负载终端的电源控制方法及装置、计算机程序及载体 Download PDFInfo
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- WO2015154377A1 WO2015154377A1 PCT/CN2014/086228 CN2014086228W WO2015154377A1 WO 2015154377 A1 WO2015154377 A1 WO 2015154377A1 CN 2014086228 W CN2014086228 W CN 2014086228W WO 2015154377 A1 WO2015154377 A1 WO 2015154377A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- the invention relates to a power control technology, in particular to a power control method and a power control device for a large load terminal, and a computer program and a carrier thereof.
- the battery capacity is generally increased, and a battery with a high output current capability and a charge management chip with a large output current are selected to meet the system requirements.
- the battery capacity cannot be increased indefinitely, and various factors need to be considered comprehensively, which limits the application of this method.
- the large current may cause the battery over-current protection, thereby causing the terminal to directly shut down, reducing the safety of the battery power supply, and the user experience.
- an embodiment of the present invention provides a power control method and a power control device for a large load terminal, and a computer program and a carrier thereof, which can ensure a working current of a large load is an optimal working current, and improve a user experience. .
- Presetting an initial value of the working current of the large load Presetting an initial value of the working current of the large load, the initial value of the working current being less than or equal to the maximum current allowed by the large load terminal system;
- the initial load is supplied according to the initial value of the operating current, and the internal power supply voltage is detected;
- the large load is a load whose power consumption is greater than a threshold.
- the above method further includes:
- the operating current of the large load is adjusted so that the large load operates in the maximum current mode allowed.
- the operating current for adjusting the large load in real time includes:
- the operating current of the large load is gradually decreased according to a preset step size until the internal power supply voltage is greater than the second threshold.
- the above method further includes:
- the operating current of the large load is continuously reduced according to the preset step size until the operating current of the large load is the lowest operating current, and when the internal power supply voltage is low to the shutdown voltage, the terminal system is powered off.
- the embodiment of the invention further provides a power control device for a large load terminal, comprising at least a charging management module, an internal power module, a detecting module, a main control module, and a DC conversion module; wherein
- the charging management module is configured to: select an input from an external power source or an internal power module; and output a first notification to the main control module when the input is selected from the internal power module;
- the main control module is configured to: when receiving the first notification from the charging management module, output a first switching notification to the DC conversion module; when the large load is turned on, according to a preset large operating current of a large load
- the initial value controls the DC conversion module to set its output current, and outputs a second notification to the detection module; and controls the DC conversion module to adjust its output current according to the internal power supply voltage detected by the detection module;
- the DC conversion module is configured to: when receiving the first switching notification from the autonomous control module, switch its input to an internal power supply module, and turn off the input of the external power supply; set the output current of the main control module according to the control of the main control module, The power is supplied according to the initial value of the working current as a large load; the output current of the main control module is adjusted in real time according to the control of the main control module;
- the detecting module is configured to: upon receiving the second notification from the main control module, The internal power module performs detection, and outputs the detected internal power supply voltage to the main control module;
- the large load is a load whose power consumption is greater than a threshold.
- the charging management module is further configured to output a third notification to the main control module when the input is selected from an external power source;
- the main control module is further configured to: when receiving the third notification from the charging management module, output a second switching notification to the DC conversion module, and simultaneously control an output current of the DC conversion module to a maximum output mode ;
- the DC conversion module is further configured to, when receiving the second switching notification from the main control module, switch an input of the DC conversion module to an external power source directly connected thereto, and close the internal power module Input, and adjust its own output current to the maximum output mode according to the control of the main control module, so that the large load works in the maximum current mode allowed.
- the DC conversion module is a circuit capable of adjusting an input of an external power source or an internal power source to a voltage suitable for a large load operation.
- the DC conversion module is a buck buck circuit or a boost boost circuit.
- the main control module is configured to adjust the output current of the DC conversion module in real time according to the internal power supply voltage detected from the detection module in the following manner:
- the detecting module detects that the internal power supply voltage is greater than the first threshold, gradually increasing the output current of the DC conversion module according to a preset step size until the detecting module detects that the internal power supply voltage is reduced to less than or equal to First threshold
- the detecting module detects that the internal power supply voltage is less than or equal to the second threshold, gradually reducing the output current of the DC conversion module according to a preset step size until the detection module detects that the internal power supply voltage is greater than the first Two thresholds.
- the main control module is further configured to:
- the detecting module detects that the internal power supply voltage cannot rise back to be greater than the second threshold, continue to gradually reduce the output current of the DC conversion module according to the preset step size until the DC conversion module The output current is the lowest operating current of the large load, and when the detecting module detects that the internal power supply voltage is low to the shutdown voltage, the large load terminal system is controlled to be powered off.
- the embodiment of the invention further provides a computer program, comprising program instructions, when the program instruction is executed by the terminal, enabling the terminal to perform the method described above.
- Embodiments of the present invention also provide a carrier carrying the above computer program.
- the large load terminal system continuously adjusts the current limit point in the current power state to ensure that the working current of the large load is always the optimal working current during the internal power supply. , improved user experience.
- the high-load terminal system is powered off when the battery is low to the shutdown voltage, which enhances the safety of the internal power supply.
- the external power supply is directly connected to the DC converter to supply a large load through the DC converter, thereby helping to share the current flowing through the charge management chip without any limitation on the DC converter output current. Let the large load work in the maximum current mode allowed.
- FIG. 1 is a flowchart of a power control method of a large load terminal according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a power control device of a large load terminal according to an embodiment of the present invention
- FIG. 3 is a schematic flow chart of an application example of a power control method for a large load terminal according to the present invention.
- FIG. 1 is a flowchart of a power control method of a large load terminal according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:
- Step 100 preset the initial value of the working current of the large load in the maximum current allowed by the large load terminal system.
- the initial value of the working current of the large load is an internal working power voltage, such as the operating voltage of the large load when the battery voltage is between the first threshold and the second threshold, and the initial value of the working current does not exceed the allowable value of the system.
- Maximum current the first threshold, the second threshold, and the most suitable operating current are all under different voltages, and after different currents are turned on, the voltage is summarized according to the drop value of the battery voltage, and the specific implementation is the technology in the field. The scope of the present invention is not limited to the scope of protection of the present invention, and is not described herein.
- Step 101 When a large load needs to be turned on and the internal power supply is used, the initial value of the working current is supplied according to the large load, and the internal power supply voltage is detected.
- This step also includes: when a large load needs to be turned on and an external power supply is used, the operating current for the large load is not limited, and the operating current of the large load is adjusted to operate the large load in the maximum current mode allowed.
- Step 102 Adjust the working current of the large load in real time according to the detected internal power supply voltage, so that the working current of the large load is the optimal working current.
- the real-time adjustment of the working current of the large load in this step specifically includes:
- the operating current of the large load is gradually increased according to the preset step size until the internal power supply voltage drops to less than or equal to the first threshold, and the adjusted operating current is the current state.
- the operating current of the large load is gradually decreased according to the preset step size until the internal power supply voltage is greater than the second threshold.
- the adjusted operating current is the optimum operating current for the large load allowed in the current state;
- this step further includes: following Continue to gradually reduce the working current of the large load according to the preset step size until the working current of the large load is the minimum working current, and then wait until the internal power supply voltage is low to the shutdown voltage, and the heavy load terminal system is powered off.
- the working current of the large load has been adjusted to the lowest current, it can work for a while until the internal power supply voltage is low to the shutdown voltage, and the system will be powered off.
- the large load terminal system continuously adjusts the current limit point in the current power state to ensure that the working current of the large load is always the highest during the internal power supply or the external power supply. Good working current boosts user experience. Further, when the operating current of the large load is the minimum operating current, and then waits until the internal power supply voltage is as low as the shutdown voltage, the large load terminal system is powered off, which enhances the safety of the internal power supply.
- FIG. 2 is a schematic structural diagram of a power control device of a large load terminal according to an embodiment of the present invention. As shown in FIG. 2, at least a charging management module, an internal power module, a detection module, a main control module, and a DC conversion module are included;
- the charging management module is configured to select input from an external power source or an internal power module, and provide power to other loads in the large load terminal, that is, non-large loads; and when the selection input is from the internal power module, output a first notification to the main control module. It is also used to charge the internal power module.
- the charging management module selects a charging management chip with high voltage, current input, and high current output according to the current demand of the back end load, for example, TI's BQ24192.
- Other loads may include, but are not limited to, WIFI circuits, RF circuits, charging circuits, and the like.
- the main control module is configured to: when receiving the first notification from the charging management module, output a first switching notification to the DC conversion module; when the large load is turned on, control the DC conversion module according to a preset initial value of the working current of the large load The output current is set, and a second notification is output to the detection module; the DC conversion module is controlled in real time according to the internal power supply voltage detected by the detection module to adjust its output current.
- the main control module can adjust the output current of the DC conversion module by, for example, a digital potentiometer, and the specific implementation is a conventional technical means by those skilled in the art, and is not described herein, nor is it intended to limit the scope of the present invention. Of course, it can also be implemented by other existing analog control circuits, and is not limited to using a digital potentiometer.
- the DC conversion module is configured to switch the input to the internal power module and turn off the input of the external power source when receiving the first switching notification from the autonomous control module; set the output current according to the control of the main control module to follow The initial value of the working current is the power supply of the large load; the output current of the main control module is adjusted in real time according to the control of the main control module, so that the working current of the large load is the optimal working current.
- the DC conversion module refers to a circuit that can adjust an input of an external power source or an internal power source such as a battery to a voltage suitable for a large load operation, such as a buck circuit, a boost circuit, or the like. How the circuit itself is embodied is not intended to limit the scope of the invention.
- the detecting module is configured to detect the internal power module when receiving the second notification from the autonomous control module, and output the detected internal power voltage to the main control module.
- the specific implementation of the detection circuit is well known to those skilled in the art, and the specific implementation of the circuit is not intended to limit the scope of the present invention, and details are not described herein.
- the charging management module is further configured to output a third notification to the main control module when the input is selected from the external power source;
- the main control module is further configured to: when receiving the third notification from the charging management module, output a second switching notification to the DC conversion module, and simultaneously control the output current of the DC conversion module to a maximum output mode;
- the DC conversion module is further configured to switch the input to the external power source and turn off the input of the internal power module when receiving the second switching notification from the autonomous control module, and adjust the output current of the internal power module according to the control of the main control module.
- the external power supply when an external power supply is used, the external power supply is directly connected to the DC converter to supply power to the large load through the DC converter, thereby helping to share the current flowing through the charge management chip, allowing the large load to work.
- the maximum current mode when an external power supply is used, the external power supply is directly connected to the DC converter to supply power to the large load through the DC converter, thereby helping to share the current flowing through the charge management chip, allowing the large load to work.
- the main control module is configured to adjust the output current of the DC conversion module in real time according to the internal power supply voltage detected from the detection module in the following manner:
- the detecting module detects that the internal power supply voltage is greater than the first threshold, gradually increasing the output current of the DC conversion module according to a preset step size until the detecting module detects that the internal power supply voltage is reduced to less than or equal to First threshold
- the detecting module detects that the internal power supply voltage is less than or equal to the second threshold, gradually reducing the output current of the DC conversion module according to a preset step size until the detection module detects that the internal power supply voltage is greater than the first Two thresholds.
- the main control module is further configured to:
- the detecting module detects that the internal power supply voltage cannot rise back to be greater than the second threshold, continue to gradually reduce the output current of the DC conversion module according to the preset step size until the DC conversion module The output current is the lowest operating current of the large load, and when the detecting module detects that the internal power supply voltage is low to the shutdown voltage, the large load terminal system is controlled to be powered off.
- the large load when the battery is supplied, the large load is not allowed to operate in the maximum mode. Instead, the operating current is constantly adjusted to operate at the optimum operating current.
- the external power supply When an external power supply is inserted, the external power supply does not pass through the charging management chip, but directly connects the large load through the DC converter, thus helping to share the flow. Overcharge the current of the management chip. Let the large load work in the maximum current mode allowed.
- FIG. 3 is a schematic flowchart of an application example of a power control method for a large load terminal according to the present invention.
- a terminal includes a projector module, that is, a large load is a micro-injection, and the system power consumption thereof is required.
- the DC conversion module is a buck circuit, the external power supply is connected through an adapter, and the internal power supply module is a battery. As shown in Figure 3, the following steps are included:
- Step 300 The terminal system is powered on.
- Step 301 The other load in the terminal is normally powered, but the DC converter that supplies the micro-power supply is turned off, that is, the buck circuit is enabled, so that the micro-injection temporarily does not work.
- Step 302 When the micro-projection circuit is not turned on, continue to wait for the instruction of the micro-injection to be turned on. If there is an instruction to open the micro-injection, the process proceeds to step 303.
- Step 303 The main control module determines whether the system has external power insertion (ie, adapter access) according to the notification of the charging management module, such as an interrupt. If there is an adapter access, go to step 313; if there is no adapter access, only the battery is powered. Go to step 304.
- external power insertion ie, adapter access
- Step 304 The buck circuit is controlled by the main control module, turns off the power supply path of the external power source, and selects the battery as its input source.
- Step 305 The main control module adjusts the output current of the buck circuit by adjusting the digital potentiometer, and sets the output current to the initial value of the working current of the preset large load, and then turns on the buck circuit to enable.
- Step 306 Turn on the micro-projection driver and turn on the micro-projection.
- Step 307 After the micro-injection is turned on, the battery voltage is detected, and it is determined whether the battery voltage drop is lower than the first threshold set first. If not lower than the first threshold, the process proceeds to step 308; if the battery voltage is lower than or equal to the first The threshold proceeds to step 309.
- Step 308 Stepwise step-by-step amplification of the output current of the buck circuit according to the preset step size. At this time, the micro-projection brightness is gradually increased. In this process, for each additional level of current, step 307 is repeated to re-detect the battery voltage.
- Step 309 At this time, the optimal operating point of the micro-injection in the current state of charge is considered, that is, the operating current of the large load at this time is the optimal operating current.
- Step 310 Continue to perform detection of the battery voltage. As the micro-injection is turned on for a long time, the battery power is gradually decreased. If the battery voltage is less than or equal to the preset second threshold, the process proceeds to step 311; if the battery voltage is greater than the second threshold, step 310 is continued.
- Step 311 Stepwise reduce the output current of the buck circuit according to the preset step size. At this time, the micro-projection brightness is gradually decreased. In this process, each time the current is reduced, step 312 is performed to make a determination.
- Step 312 detecting the battery voltage, determining whether the voltage value rises above the second threshold, if not, repeating step 311; if the rebound exceeds the second threshold, performing step 309;
- the terminal system will be powered off.
- the system is always balanced to work at the optimal working current, and the large load such as micro-injection also realizes the optimal working current state under the current battery state.
- step 303 determines that the external power source is connected by the adapter, perform the following steps:
- Step 313 The buck circuit is controlled by the main control module, opens the power supply path of the external power supply side, turns off the power supply path of the battery side, and selects an external power supply as its input source.
- Step 314 The main control module controls to adjust the output current of the buck circuit to operate in the maximum output mode, without any limitation on the output current, and then turn on the buck circuit enable.
- Step 315 Turn on the micro-projection, and the micro-projection at this time can work at the highest brightness, that is, the large load works in the maximum current mode allowed.
- all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve. Thus, the invention is not limited to any specific combination of hardware and software.
- the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
- each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
- the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
- the large load terminal system of the embodiment of the invention continuously adjusts the current limit point in the current power state, ensuring that during the internal power supply, the working current of the large load is always the optimal working current, which improves the user experience.
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Abstract
一种大负载终端的电源控制方法及电源控制装置，以及一种计算机程序及载体，该方法包括：预先设置大负载的工作电流初始值，所述工作电流初始值小于等于大负载终端系统所允许的最大电流；当需要开启大负载且采用内部电源供电时，按照工作电流初始值为大负载供电，并检测内部电源电压；根据检测到的内部电源电压实时调整大负载的工作电流。
Description
本发明涉及电源控制技术，尤指一种大负载终端的电源控制方法及电源控制装置，以及一种计算机程序及其载体。
随着通讯技术和网络技术的不断发展，用户需求不断增加，终端设备越来越多样化，创新化，一个终端设备所集成的功能也越来越多，但随之而来的是后端负载越来越大，整机功耗问题也越来越突出。
在相关技术中，当后端负载功耗越来越大时，一般都会通过采取加大电池容量，选取输出电流能力高的电池和输出电流大的充电管理芯片来满足系统需求。但是，电池容量不可能无限的增大，需要综合考虑各方面的因素，这就限制了这种方法的应用。而且，当系统供电能力不足以满足后端大负载最大功耗工作时，大电流可能导致电池过流保护，从而使得终端直接关机，降低了电池供电的安全性，及用户体验。
发明内容
为了解决上述技术问题，本发明实施例提供一种大负载终端的电源控制方法及电源控制装置，以及一种计算机程序及其载体，能够保证大负载的工作电流为最佳工作电流，提升用户体验。
本发明实施例提供的一种大负载终端的电源控制方法，包括：
预先设置大负载的工作电流初始值，所述工作电流初始值小于等于大负载终端系统所允许的最大电流；
当需要开启大负载且采用内部电源供电时，按照所述工作电流初始值为所述大负载供电，并检测内部电源电压；
根据检测到的内部电源电压实时调整所述大负载的工作电流；
其中，所述大负载是功耗大于阈值的负载。
较佳地，上述方法还包括：
当需要开启大负载且采用外部电源供电时，调整所述大负载的工作电流，使所述大负载工作在所允许的最大电流模式下。
较佳地，所述实时调整大负载的工作电流包括：
当检测到所述内部电源电压大于第一阈值时，按照预先设置的步长逐步增加所述大负载的工作电流，直至所述内部电源电压减小至小于或等于第一阈值；
当检测到所述内部电源电压小于或等于第二阈值时，按照预先设置的步长逐步减小所述大负载的工作电流，直至所述内部电源电压大于第二阈值。
较佳地，上述方法还包括：
当所述内部电源电压不能回升至大于所述第二阈值时，
继续按照所述预先设置的步长逐步减小大负载的工作电流，直至所述大负载的工作电流为最低工作电流，当所述内部电源电压低至关机电压时，终端系统低电关机。
本发明实施例还提供一种大负载终端的电源控制装置，至少包括充电管理模块、内部电源模块、检测模块、主控模块，以及直流变换模块；其中，
所述充电管理模块设置为：选择输入来自外部电源或内部电源模块；在选择输入来自内部电源模块时，向所述主控模块输出第一通知；
所述主控模块设置为：在接收到来自所述充电管理模块的第一通知时，向所述直流变换模块输出第一切换通知；在大负载开启时，按照预先设置的大负载的工作电流初始值控制所述直流变换模块设置其输出电流，并向所述检测模块输出第二通知；根据来自所述检测模块检测到的内部电源电压实时控制直流变换模块调整其输出电流；
所述直流变换模块设置为：在接收到来自主控模块的第一切换通知时，将其输入切换为内部电源模块，并关闭外部电源的输入；按照主控模块的控制设置自身的输出电流，以按照工作电流初始值为大负载供电；按照主控模块的控制实时调整自身的输出电流；
所述检测模块设置为：在接收到来自所述主控模块的第二通知时，对所
述内部电源模块进行检测，并将检测到的内部电源电压输出给所述主控模块；
其中，所述大负载是功耗大于阈值的负载。
较佳地，所述充电管理模块，还设置为在选择输入来自外部电源时，向所述主控模块输出第三通知；
所述主控模块，还设置为在接收到来自所述充电管理模块的第三通知时，向所述直流变换模块输出第二切换通知，同时控制所述直流变换模块的输出电流为最大输出模式；
所述直流变换模块，还设置为在接收到来自所述主控模块的第二切换通知时，将所述直流变换模块的输入切换为与其直接连接的外部电源，并关闭所述内部电源模块的输入，并且按照所述主控模块的控制调整自身的输出电流为最大输出模式，以使大负载工作在所允许的最大电流模式下。
较佳地，所述直流变换模块为能将外部电源或内部电源的输入调整成为适合大负载工作的电压的电路。
较佳地，所述直流变换模块为降压buck电路、或升压boost电路。
较佳地，所述主控模块是设置为以如下方式根据来自所述检测模块检测到的内部电源电压实时控制直流变换模块调整其输出电流：
当所述检测模块检测到所述内部电源电压大于第一阈值，按照预先设置的步长逐步增加所述直流变换模块的输出电流，直至所述检测模块检测到内部电源电压减小至小于或等于第一阈值；
当所述检测模块检测到所述内部电源电压小于或等于第二阈值时，按照预先设置的步长逐步减小所述直流变换模块的输出电流，直至所述检测模块检测到内部电源电压大于第二阈值。
较佳地，所述主控模块还设置为：
当所述检测模块检测到所述内部电源电压不能回升至大于所述第二阈值时，继续按照所述预先设置的步长逐步减小所述直流变换模块的输出电流，直至所述直流变换模块的输出电流为所述大负载的最低工作电流，当所述检测模块检测到所述内部电源电压低至关机电压时，控制所述大负载终端系统低电关机。
本发明实施例还提供一种计算机程序，包括程序指令，当该程序指令被终端执行时，使得该终端可执行上面所述的方法。
本发明实施例还提供一种载有上述计算机程序的载体。
从本发明实施例大负载终端的电源控制方法可见，大负载终端系统在不断的调整当前电量状态下的限流点，保证了在内部电源供电期间，大负载的工作电流始终为最佳工作电流，提升了用户体验。
此外，当大负载的工作电流为最低工作电流时，等待直至电池电量低至关机电压时，大负载终端系统低电关机，增强了内部电源供电的安全性。
此外，在采用外部电源供电时，外部电源直接与直流变换器连接以通过直流变换器给大负载供电，这样帮忙分担了流过充电管理芯片的电流，且不对直流变换器输出电流做任何限制，让大负载工作在所允许的最大电流模式下。
附图概述
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为本发明实施例大负载终端的电源控制方法的流程图；
图2为本发明实施例大负载终端的电源控制装置的组成结构示意图；
图3为本发明大负载终端的电源控制方法的应用实例的流程示意图。
下文中将结合附图对本发明的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
图1为本发明实施例大负载终端的电源控制方法的流程图，如图1所示，包括：
步骤100：在大负载终端系统所允许的最大电流内，预先设置大负载的工作电流初始值。
本步骤中，大负载的工作电流初始值为，内部电源电压如电池电压在第一阈值到第二阈值之间时大负载最合适的工作电流，该工作电流初始值不会超过系统所允许的最大电流。这里，第一阈值、第二阈值、以及最适合的工作电流，都是大负载在不同电压下，采用不同大小的电流开启后，根据电池电压的跌落值总结出来的，具体实现是本领域技术人员按照本发明实施例提供的技术方案的基础上容易实现的，并不用于限定本发明的保护范围，这里不再赘述。
步骤101：当需要开启大负载且采用内部电源供电时，按照工作电流初始值为大负载供电，并检测内部电源电压。
本步骤还包括：当需要开启大负载且采用外部电源供电时，不对为大负载供电的工作电流做限制，调整大负载的工作电流，使大负载工作在所允许的最大电流模式下。
需要说明的是，本步骤中如何对电源电压进行检测属于本领域技术人员的惯用技术手段，这里不再赘述，其具体实现也不用于限定本发明的保护范围。
步骤102：根据检测到的内部电源电压实时调整大负载的工作电流，使大负载的工作电流为最佳工作电流。
本步骤的实时调整大负载的工作电流具体包括：
如果检测到内部电源电压大于第一阈值，按照预先设置的步长逐步增加大负载的工作电流，直至内部电源电压跌落至小于或等于第一阈值，此时调整出的工作电流为当前状态下所允许的大负载的最佳工作电流；
随着内部电源电量的消耗，当检测到内部电源电压跌落至小于或等于第二阈值时，按照预先设置的步长逐步减小大负载的工作电流，直至内部电源电压大于第二阈值，此时调整出的工作电流为当前状态下所允许的大负载的最佳工作电流；
之后继续监测内部电源电压，并执行上述实时调整过程对大负载的工作电流进行相应调整。
如果内部电源电压不能回升至大于第二阈值时，本步骤之后还包括：继
续按照预先设置的步长逐步减小大负载的工作电流，直至大负载的工作电流为最低工作电流，然后等待直至内部电源电压低至关机电压时，大负载终端系统低电关机。这里，当大负载的工作电流已经调整到了最低电流时，还可以工作一段时间，直到内部电源电压低到关机电压，系统才会低电关机。
从本发明实施例大负载终端的电源控制方法可见，大负载终端系统在不断的调整当前电量状态下的限流点，保证了在内部电源或外部电源供电期间，大负载的工作电流始终为最佳工作电流，提升了用户体验。进一步地，当大负载的工作电流为最低工作电流时，然后等待直至内部电源电压低至关机电压时，大负载终端系统低电关机，增强了内部电源供电的安全性。
图2为本发明实施例的大负载终端的电源控制装置的组成结构示意图，如图2所示，至少包括充电管理模块、内部电源模块、检测模块、主控模块，以及直流变换模块；其中，
充电管理模块，设置为选择输入来自外部电源或内部电源模块，并向大负载终端中的其它负载即非大负载提供电源；在选择输入来自内部电源模块时，向主控模块输出第一通知。还用于对内部电源模块进行充电。
这里，本领域技术人员知道，充电管理模块是根据后端负载所需要的电流情况，选取高电压、电流输入，大电流输出的充电管理芯片，例如：TI的BQ24192等。其他负载可以包括但不限于WIFI电路、射频电路、充电宝电路等。
主控模块，设置为在接收到来自充电管理模块的第一通知时，向直流变换模块输出第一切换通知；在大负载开启时，按照预先设置的大负载的工作电流初始值控制直流变换模块设置其输出电流，并向检测模块输出第二通知；根据来自检测模块检测到的内部电源电压实时控制直流变换模块调整其输出电流。
这里，主控模块可以通过如数字电位器来调整直流变换模块的输出电流，其具体实现属于本领域技术人员的惯用技术手段，这里不再赘述，也不用于限定本发明的保护范围。当然也可以通过其它现有模拟控制电路来实现，这里并不限定使用数字电位器来实现。
大负载可以是如微投、也可能是功耗更大的产品。
直流变换模块，设置为在接收到来自主控模块的第一切换通知时，将其输入切换为内部电源模块，并关闭外部电源的输入；按照主控模块的控制设置自身的输出电流，以按照工作电流初始值为大负载供电；按照主控模块的控制实时调整自身的输出电流，以使大负载的工作电流为最佳工作电流。
这里，直流变换模块是指能将外部电源或内部电源如电池的输入调整成为适合大负载工作的电压的这样一类的电路，比如降压(buck)电路、升压(boost)电路等。电路本身具体如何实现并不用于限定本发明的保护范围。
检测模块，设置为在接收到来自主控模块的第二通知时，对内部电源模块进行检测，并将检测到的内部电源电压输出给主控模块。检测电路的具体实现属于本领域技术人员的公知技术，其电路具体实现也不用于限定本发明的保护范围，这里不再赘述。
较佳地，充电管理模块，还设置为在选择输入来自外部电源时，向主控模块输出第三通知；
主控模块，还设置为在接收到来自充电管理模块的第三通知时，向直流变换模块输出第二切换通知，同时控制直流变换模块的输出电流为最大输出模式；
直流变换模块，还设置为在接收到来自主控模块的第二切换通知时，将其输入切换为外部电源，并关闭内部电源模块的输入，并且按照主控模块的控制调整自身的输出电流为最大输出模式，以使大负载工作在所允许的最大电流模式下。本发明实施例中，在采用外部电源供电时，外部电源直接与直流变换器连接以通过直流变换器给大负载供电，这样帮忙分担了流过充电管理芯片的电流，让大负载工作在所允许的最大电流模式下。
其中，所述主控模块是设置为以如下方式根据来自所述检测模块检测到的内部电源电压实时控制直流变换模块调整其输出电流：
当所述检测模块检测到所述内部电源电压大于第一阈值，按照预先设置的步长逐步增加所述直流变换模块的输出电流，直至所述检测模块检测到内部电源电压减小至小于或等于第一阈值；
当所述检测模块检测到所述内部电源电压小于或等于第二阈值时，按照预先设置的步长逐步减小所述直流变换模块的输出电流，直至所述检测模块检测到内部电源电压大于第二阈值。
其中，所述主控模块还设置为：
当所述检测模块检测到所述内部电源电压不能回升至大于所述第二阈值时，继续按照所述预先设置的步长逐步减小所述直流变换模块的输出电流，直至所述直流变换模块的输出电流为所述大负载的最低工作电流，当所述检测模块检测到所述内部电源电压低至关机电压时，控制所述大负载终端系统低电关机。
从本发明实施例提供的技术方案可见，在采用电池供给时，不让大负载工作在最大模式。而是不断调整其工作电流，使其工作在最佳工作电流上；当采用外部电源插入时，外部电源并不经过充电管理芯片，而是直接通过直流变换器连接大负载，这样帮忙分担了流过充电管理芯片的电流。让大负载工作在了所允许的最大电流模式下。
下面结合以具体应用实例对本发明实施例提供的电源控制方案进行详细描述。
图3为本发明大负载终端的电源控制方法的应用实例的流程示意图，结合图2，本实施例中，假设终端包括有投影仪模块即带有的大负载为微投，其系统功耗要远远大于一般的手机、平板、uFI等产品。直流变换模块为buck电路，外部电源通过适配器接入，内部电源模块为电池。如图3所示，包括如下步骤：
步骤300：终端系统开机。
步骤301：终端中其它负载正常供电，但关闭给微投供电的直流变换器即buck电路的使能，使微投暂时不工作。
步骤302：在微投电路不开启时，继续等待微投开启的指令，一旦有微投开启的指令，进入步骤303。
步骤303：主控模块根据充电管理模块的通知如中断信号，判断系统是否有外部电源插入(即适配器接入)，如果有适配器接入，进入步骤313；如果没有适配器接入，只有电池供电时，执行步骤304。
步骤304：buck电路受主控模块的控制，关闭外部电源的供电通路，选择电池作为其输入源。
步骤305：主控模块通过调整数字电位器来调整buck电路的输出电流，使其输出电流设置在预先设置的大负载的工作电流初始值，然后打开buck电路的使能。
步骤306：打开微投驱动，开启微投。
步骤307：微投开启后，检测电池电压，判断电池电压跌落后是否低于先设置的第一阈值，如果不低于即大于第一阈值，进入步骤308；如果低于即小于或等于第一阈值，则进入步骤309。
步骤308：按照预先设置的步长，逐步阶梯式的放大buck电路的输出电流，此时，微投亮度逐渐增大。在这个过程中，每增加一级电流，都要重复执行步骤307重新对电池电压进行检测。
步骤309：此时认为微投在当前电量状态下的最佳工作点，也就是说，此时的大负载的工作电流为最佳工作电流。
步骤310：继续执行对电池电压的检测。随着微投的长时间开启，电池电量也会逐渐降低，如果电池电压小于或等于预先设置的第二阈值，进入步骤311；如果电池电压大于第二阈值，继续执行步骤310。
步骤311：按照预先设置的步长，逐步阶梯式的减小buck电路的输出电流，此时，微投亮度逐渐降低。在这个过程中，每减小一级电流，都要执行步骤312进行一次判断。
步骤312：检测电池电压，判断电压值是否回升超过第二阈值，如没有，则重复执行步骤311；如回升超过第二阈值，则执行步骤309；
按照图3所示的调整流程，直至调整至微投的最低工作电流，然后等待直至电池电压低至关机电压时，终端系统会低电关机。通过本发明实施例对电源控制的方式，使得系统一直平衡工作在最佳的工作电流，大负载如微投也实现了工作在当前电池电量状态下的最佳工作电流状态。
当步骤303判断出是由适配器接入的外部电源供电时，执行以下步骤：
步骤313：buck电路受主控模块的控制，打开外部电源侧的供电通路，关闭电池侧的供电通路，选择外部电源作为其输入源。
步骤314：主控模块控制调整buck电路的输出电流，使其工作在最大输出模式，对其输出电流不做任何限制，然后打开buck电路的使能。
步骤315：打开微投，此时的微投可最高亮度工作，即大负载工作在所允许的最大电流模式下。
以上所述，仅为本发明的较佳实例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
上述实施例中的各装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的各装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
本发明实施例的大负载终端系统在不断的调整当前电量状态下的限流点，保证了在内部电源供电期间，大负载的工作电流始终为最佳工作电流，提升了用户体验。
Claims (12)
- 一种大负载终端的电源控制方法，包括：预先设置大负载的工作电流初始值，所述工作电流初始值小于等于大负载终端系统所允许的最大电流；当需要开启大负载且采用内部电源供电时，按照所述工作电流初始值为所述大负载供电，并检测内部电源电压；根据检测到的内部电源电压实时调整所述大负载的工作电流；其中，所述大负载是功耗大于阈值的负载。
- 根据权利要求1所述的电源控制方法，还包括：当需要开启大负载且采用外部电源供电时，调整所述大负载的工作电流，使所述大负载工作在所允许的最大电流模式下。
- 根据权利要求1或2所述的电源控制方法，其中，所述实时调整大负载的工作电流包括：当检测到所述内部电源电压大于第一阈值时，按照预先设置的步长逐步增加所述大负载的工作电流，直至所述内部电源电压减小至小于或等于第一阈值；当检测到所述内部电源电压小于或等于第二阈值时，按照预先设置的步长逐步减小所述大负载的工作电流，直至所述内部电源电压大于第二阈值。
- 根据权利要求3所述的电源控制方法，还包括：当所述内部电源电压不能回升至大于所述第二阈值时，继续按照所述预先设置的步长逐步减小大负载的工作电流，直至所述大负载的工作电流为最低工作电流，当所述内部电源电压低至关机电压时，终端系统低电关机。
- 一种大负载终端的电源控制装置，至少包括充电管理模块、内部电源模块、检测模块、主控模块，以及直流变换模块；其中，所述充电管理模块设置为：选择输入来自外部电源或内部电源模块；在选择输入来自内部电源模块时，向所述主控模块输出第一通知；所述主控模块设置为：在接收到来自所述充电管理模块的第一通知时，向所述直流变换模块输出第一切换通知；在大负载开启时，按照预先设置的大负载的工作电流初始值控制所述直流变换模块设置其输出电流，并向所述检测模块输出第二通知；根据来自所述检测模块检测到的内部电源电压实时控制直流变换模块调整其输出电流；所述直流变换模块设置为：在接收到来自主控模块的第一切换通知时，将其输入切换为内部电源模块，并关闭外部电源的输入；按照主控模块的控制设置自身的输出电流，以按照工作电流初始值为大负载供电；按照主控模块的控制实时调整自身的输出电流；所述检测模块设置为：在接收到来自所述主控模块的第二通知时，对所述内部电源模块进行检测，并将检测到的内部电源电压输出给所述主控模块；其中，所述大负载是功耗大于阈值的负载。
- 根据权利要求5所述的电源控制装置，其中，所述充电管理模块，还设置为在选择输入来自外部电源时，向所述主控模块输出第三通知；所述主控模块，还设置为在接收到来自所述充电管理模块的第三通知时，向所述直流变换模块输出第二切换通知，同时控制所述直流变换模块的输出电流为最大输出模式；所述直流变换模块，还设置为在接收到来自所述主控模块的第二切换通知时，将所述直流变换模块的输入切换为与其直接连接的外部电源，并关闭所述内部电源模块的输入，并且按照所述主控模块的控制调整自身的输出电流为最大输出模式，以使大负载工作在所允许的最大电流模式下。
- 根据权利要求5或6所述的电源控制装置，其中，所述直流变换模块为能将外部电源或内部电源的输入调整成为适合大负载工作的电压的电路。
- 根据权利要求7所述的电源控制装置，其中，所述直流变换模块为降压buck电路、或升压boost电路。
- 如权利要求5或6所述的电源控制装置，其中，所述主控模块是设置 为以如下方式根据来自所述检测模块检测到的内部电源电压实时控制直流变换模块调整其输出电流：当所述检测模块检测到所述内部电源电压大于第一阈值，按照预先设置的步长逐步增加所述直流变换模块的输出电流，直至所述检测模块检测到内部电源电压减小至小于或等于第一阈值；当所述检测模块检测到所述内部电源电压小于或等于第二阈值时，按照预先设置的步长逐步减小所述直流变换模块的输出电流，直至所述检测模块检测到内部电源电压大于第二阈值。
- 如权利要求9所述的电源控制装置，其中，所述主控模块还设置为：当所述检测模块检测到所述内部电源电压不能回升至大于所述第二阈值时，继续按照所述预先设置的步长逐步减小所述直流变换模块的输出电流，直至所述直流变换模块的输出电流为所述大负载的最低工作电流，当所述检测模块检测到所述内部电源电压低至关机电压时，控制所述大负载终端系统低电关机。
- 一种计算机程序，包括程序指令，当该程序指令被终端执行时，使得该终端可执行权利要求1-5任一项所述的方法。
- 一种载有权利要求11所述计算机程序的载体。
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| CN106585392A (zh) * | 2015-10-16 | 2017-04-26 | Zf腓德烈斯哈芬股份公司 | 在载荷下降时对电流梯度的限制 |
| CN106954308A (zh) * | 2017-04-19 | 2017-07-14 | 赛尔富电子有限公司 | 一种led调光电源最小输出电流的规制系统 |
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| US20020171400A1 (en) * | 2001-03-08 | 2002-11-21 | Shunsuke Koyama | Battery powered electronic device and control method therefor |
| CN101363902A (zh) * | 2007-08-10 | 2009-02-11 | 佳能株式会社 | 电子设备和电池检查方法 |
| CN103580109A (zh) * | 2012-08-09 | 2014-02-12 | 三星电子株式会社 | 控制负载电流的方法、负载电流控制装置和移动装置 |
| CN103660967A (zh) * | 2012-09-24 | 2014-03-26 | 通用电气公司 | 具有改进的能量供应机制的移动运输设备和方法 |
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| US20020171400A1 (en) * | 2001-03-08 | 2002-11-21 | Shunsuke Koyama | Battery powered electronic device and control method therefor |
| CN101363902A (zh) * | 2007-08-10 | 2009-02-11 | 佳能株式会社 | 电子设备和电池检查方法 |
| CN103580109A (zh) * | 2012-08-09 | 2014-02-12 | 三星电子株式会社 | 控制负载电流的方法、负载电流控制装置和移动装置 |
| CN103660967A (zh) * | 2012-09-24 | 2014-03-26 | 通用电气公司 | 具有改进的能量供应机制的移动运输设备和方法 |
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| CN106585392A (zh) * | 2015-10-16 | 2017-04-26 | Zf腓德烈斯哈芬股份公司 | 在载荷下降时对电流梯度的限制 |
| CN106954308A (zh) * | 2017-04-19 | 2017-07-14 | 赛尔富电子有限公司 | 一种led调光电源最小输出电流的规制系统 |
| CN106954308B (zh) * | 2017-04-19 | 2023-12-22 | 赛尔富电子有限公司 | 一种led调光电源最小输出电流的规制系统 |
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