WO2016141572A1 - 一种终端的漏电流检测电路及终端 - Google Patents

一种终端的漏电流检测电路及终端 Download PDF

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Publication number
WO2016141572A1
WO2016141572A1 PCT/CN2015/074019 CN2015074019W WO2016141572A1 WO 2016141572 A1 WO2016141572 A1 WO 2016141572A1 CN 2015074019 W CN2015074019 W CN 2015074019W WO 2016141572 A1 WO2016141572 A1 WO 2016141572A1
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Prior art keywords
terminal
control chip
core system
power supply
leakage current
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PCT/CN2015/074019
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English (en)
French (fr)
Inventor
郑志勇
黄志强
杨江涛
富海平
裴家俊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201580055204.8A priority Critical patent/CN106797414B/zh
Priority to PCT/CN2015/074019 priority patent/WO2016141572A1/zh
Publication of WO2016141572A1 publication Critical patent/WO2016141572A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/24—Arrangements for testing

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  • the present invention relates to the field of electronic technologies, and in particular, to a leakage current detecting circuit and a terminal of a terminal.
  • Terminal leakage current is an important criterion for verifying the eligibility of end products (such as mobile phones, tablets, etc.).
  • the current common terminal product structure is as shown in FIG. 1 , and includes a core system 101 , a battery 102 , a USB (Universal Serial Bus) interface 103 , a charging chip 104 , and a battery protection circuit 105 .
  • USB Universal Serial Bus
  • the core system 101, the terminal implements the core part of each function
  • a battery 102 for providing working power to the core system 101;
  • a USB interface 103 for connecting a terminal charger; the terminal charger inputs a charging voltage through a Vbus terminal of the USB interface 103;
  • the charging chip 104 performs voltage conversion on the charging voltage input by the terminal charger through the Vbus terminal of the USB interface 103, and outputs the voltage;
  • the battery protection circuit 105 is connected to the power supply end of the core system 101 and the output end of the charging chip 104 through the battery protection circuit 105.
  • the battery protection circuit 105 mainly includes a charging switch, a discharge switch, and a battery protection IC (Integrated Circuit, The integrated circuit), the battery protection IC can control the on/off state of the charge switch and the discharge switch, thereby controlling the charge and discharge state of the battery 102, and protecting the battery 102.
  • the leakage current detection of the terminal can only be performed when the terminal is not equipped with a battery.
  • many of the current terminals are non-removable structural designs of the battery, that is, the leakage current detection of the terminal cannot be performed.
  • Embodiments of the present invention provide a leakage current detecting circuit and a terminal of a terminal, which can be The terminal leakage current is detected when the battery is used.
  • a leakage current detecting circuit of a terminal including a control chip, a power supply device, and a detecting device, wherein:
  • the control chip is configured to connect the power supply device, output a voltage input by the power supply device to a core system of the terminal, and control a disconnection between a core system of the terminal and a battery of the terminal;
  • the power device is configured to supply power to the core system by using the control chip;
  • the detecting device is configured to control disconnection between the core system and the battery in the control chip, supply power to the core system by the power device through the control chip, and the terminal is designated In the state, the output current of the power supply device is detected, and the detected output current is the leakage current of the terminal in the specified state.
  • the power device is specifically a programmable power supply.
  • control chip controls disconnection between a core system of the terminal and a battery of the terminal Specifically, by the following means:
  • the control chip controls the charging switch and the discharging switch in the battery protection circuit of the terminal to be in an off state.
  • the specified state is a shutdown state or a standby state .
  • a terminal including a control chip; when detecting a leakage current of the terminal in a specified state, the control chip is connected to a power supply device, and the control chip outputs a voltage input by the power supply device to the a core system of the terminal, providing power to the core system, and controlling disconnection between the core system and a battery of the terminal; wherein an output current of the power device is the terminal in the specified state The leakage current underneath.
  • control chip specifically passes the The ID terminal of the universal serial bus USB interface of the terminal is connected to the power supply device.
  • the power device is specifically a program-controlled power supply.
  • the control chip controls the core system and The connection between the batteries of the terminal is disconnected, which is specifically achieved by:
  • the control chip controls the charging switch and the discharging switch in the battery protection circuit of the terminal to be in an off state.
  • the specified state is a shutdown state or a standby state.
  • the terminal provided by the second aspect sets the connection between the core system of the control chip control terminal and the battery, and only uses the power supply device to supply power to the core system through the control chip.
  • the detected output current is the leakage current of the terminal in the specified state.
  • the terminal provided by the embodiment of the present invention can realize the leakage current without disassembling the battery. Detection.
  • FIG. 1 is a schematic diagram of a conventional terminal structure
  • FIG. 2 is a schematic diagram of a leakage current detecting circuit of a terminal according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic structural diagram of a terminal according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a terminal according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of a process for detecting a shutdown leakage current of a terminal according to Embodiment 2 of the present invention.
  • the present invention provides a leakage current detecting circuit and a terminal for the terminal, and a preferred embodiment of the present invention is described below with reference to the accompanying drawings.
  • the preferred embodiments described herein are to be construed as illustrative only and not limiting. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
  • Embodiment 1 of the present invention provides a leakage current detecting circuit of a terminal, as shown in FIG. 2, including a control chip 201, a power supply device 202, and a detecting device 203, wherein:
  • the control chip 201 is configured to connect the power supply device 202, output the voltage input by the power supply device 202 to the core system 101 of the terminal, and disconnect the connection between the core system 101 of the control terminal and the battery 102 of the terminal;
  • the power device 202 is configured to supply power to the core system 101 through the control chip 201.
  • the detecting device 203 is configured to detect the output of the power device 203 when the control chip 201 controls the disconnection between the core system 101 and the battery 102, the power device 202 supplies power to the core system 101 through the control chip 201, and the terminal is in a designated state. Current, the detected output current is the leakage current of the terminal in the specified state.
  • the leakage current detecting circuit provided by the embodiment of the invention can be applied to various terminals such as a mobile phone, a tablet computer, and a music player.
  • the leakage current detecting circuit provided by the embodiment of the present invention supplies power to the core system 101 only by the power device 202 when the connection between the core system 101 of the terminal and the battery 102 is disconnected, and the output current of the power device 202 is the terminal.
  • the leakage current in the specified state therefore, the leakage current can be detected without disassembling the battery.
  • the specified state may be a shutdown state or a standby state. That is, the terminal provided by the embodiment of the present invention does not need to disassemble the battery regardless of detecting the shutdown leakage current or detecting the standby leakage current.
  • the power supply device 202 supplies power to the core system 101 through the control chip 201, and the control chip 201 only The voltage is forwarded without voltage conversion, so that the detection accuracy of the leakage current can be ensured.
  • control chip 201 can be connected to the core system 101 through an existing interface such as a USB interface, an audio interface, a SIM (Subscriber Identity Module) card slot, a memory card slot, or the like;
  • SIM Subscriber Identity Module
  • control chip 201 controls the disconnection between the core system 101 of the terminal and the battery 102 of the terminal, which can be implemented in various manners, which is not limited by the present invention.
  • the control chip 201 can control the charging switch and the discharging switch in the battery protection circuit 105 of the terminal to be in an off state, thereby achieving disconnection between the core system 101 and the battery 102;
  • the control chip 201 can also control the disconnection between the core system 101 and the battery 102 by other means.
  • connection between the control chip 201 and the battery protection circuit 105 can also be implemented in various manners. No specific examples are provided. In actual implementation, specific implementation scenarios may be determined according to actual application scenarios.
  • the power device 202 can be a program-controlled power supply with high security and reliability.
  • the above detecting device 203 may specifically be various current detecting instruments.
  • the detecting device 203 is specifically configured to control the connection between the core system 101 and the battery 102 to be disconnected by the control chip 201, and pass by the power supply device 202.
  • the control chip 201 supplies power to the core system 101 and the terminal is in the shutdown state, the output current of the power supply device 203 is detected, and the detected output current is the terminal. Leakage current in the off state.
  • the detecting device 203 is specifically configured to control the connection between the core system 101 and the battery 102 to be disconnected by the control chip 201, and pass by the power supply device 202.
  • the control chip 201 supplies power to the core system 101 and the terminal is in the standby state
  • the output current of the power supply device 203 is detected, and the detected output current is the leakage current of the terminal in the standby state.
  • Embodiment 2 of the present invention provides a terminal, as shown in FIG. 3, including a control chip 300.
  • the control chip 300 When detecting a leakage current of a terminal in a specified state, the control chip 300 is connected to the power supply device, and the control chip 300 is powered. The voltage input by the device is output to the core system 101 of the terminal, and the core system 101 is powered, and the connection between the core system 101 and the battery 102 of the terminal is disconnected; wherein the output current of the power device is the leakage of the terminal in the specified state. Current.
  • the terminal provided by the embodiment of the present invention may specifically be a mobile phone, a tablet computer, a music player, or the like.
  • the specified state may be a shutdown state or a standby state. That is, the terminal provided by the embodiment of the present invention can detect whether the shutdown leakage current is detected or the standby leakage current is detected without removing the storage battery.
  • the connection between the control chip 300 and the power supply device can be implemented in various ways.
  • the control chip 300 can be connected to the power device through the USB interface 103 of the terminal; when the USB interface 103 is specifically a mini USB interface, the mini USB interface includes a VBUS terminal, a D+ terminal, a D-terminal, a GND terminal, and an ID terminal, wherein the ID The terminal is usually only used in the OTG (On-The-Go) function. Therefore, the control chip 300 can be connected to the power device through the ID terminal of the USB interface 103.
  • the control chip 300 can also be connected to the power device in other manners. No longer an example. In actual implementation, specific implementation scenarios may be determined according to actual application scenarios.
  • the power supply device is specifically a program-controlled power supply, and has high safety and reliability.
  • control chip 300 controls the disconnection between the core system 101 and the battery 102, and can also be implemented in various manners, which is not limited by the present invention.
  • the control chip 300 can control the charging switch and the discharging switch in the battery protection circuit 105 of the terminal to be in an off state, thereby achieving disconnection between the core system 101 and the battery 102; in other specific embodiments of the present invention
  • the control chip 300 can also control the disconnection between the core system 101 and the battery 102 by other means.
  • the control chip 300 when performing leakage current detection, can first connect a PC (Personal Computer) through the terminal USB interface 103, and the PC sends an instruction to the control chip 300, triggering the control chip 300 to control the core system 101 and The connection between the batteries 102 is broken.
  • PC Personal Computer
  • the following describes the leakage current detecting process of the terminal in the shutdown state according to the example of the present invention, taking the detection of the shutdown leakage current as an example.
  • the battery protection circuit 105 used by the terminal is specifically shown in FIG. 3, and mainly includes an S-82XX series battery protection IC, a charging switch SW1, and a discharge switch SW2, wherein the control terminal CTL of the battery protection IC is charging.
  • the control terminals of the switch SW1 and the discharge switch SW2 can control the on/off state of the charge switch SW1 and the discharge switch SW2 through the control terminal CTL, thereby controlling the on-off state of the connection between the core system 101 and the battery 102.
  • the power supply device used is specifically a program-controlled power supply.
  • the shutdown leakage current detection process of the terminal is shown in FIG. 5, and specifically includes:
  • Step 501 The terminal connects to the PC, and the PC sends an instruction to the control chip 300 of the terminal, instructing the control chip 300 to control the disconnection between the core system 101 and the battery 102.
  • Step 502 After receiving the instruction sent by the PC, the control chip 300 controls the connection between the core system 101 and the battery 102 to be disconnected.
  • the control chip 300 outputs a preset signal to the control terminal CTL of the battery protection IC in the battery protection circuit 105.
  • the control terminal CTL of the battery protection IC controls the charging switch through the charging switch control terminal CO output control signal.
  • SW1 is disconnected, and the discharge switch SW2 is controlled to be disconnected by the discharge switch control terminal DO output control signal, that is, the connection between the control core system 101 and the battery 102 is disconnected.
  • Step 503 Disconnect the terminal from the PC, and the control chip 300 connects the programmable power supply through the ID terminal of the USB interface 103, and outputs the voltage input by the programmable power supply to the core system 101.
  • control chip 300 can be connected to the programmable power supply through the ID terminal of the USB interface 103 through the process control power control board.
  • the core system 101 is powered only by the programmable power supply, and the programmable power supply can output the corresponding voltage according to the power supply requirement of the core system 101.
  • Step 504 The detection device detects the output current of the programmable power supply, and the current is the shutdown leakage current of the terminal.
  • the standby leakage current detecting process of the terminal provided by the embodiment of the present invention is similar to the shutdown leakage current detecting process, and is not described in detail herein.
  • the terminal provided by the embodiment of the present invention the connection between the core system of the control chip control terminal and the battery is disconnected, and only the power supply device is used to supply power to the core system, and the output current of the power supply device is detected when the terminal is in a specified state, and detection is performed.
  • the obtained output current is the leakage current of the terminal in the specified state; obviously, the terminal provided by the embodiment of the invention can realize the detection of the leakage current without disassembling the battery, thereby ensuring the reliability of the terminal product, and The solution is easy to implement and the cost is low.

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  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种终端的漏电流检测电路，该终端的漏电流检测电路，包括控制芯片（201）、电源设备（202）和检测设备（203），其中：控制芯片（201），用于连接电源设备（202），将电源设备（202）输入的电压输出至终端的核心系统（101），以及控制终端的核心系统（101）与终端的蓄电池（102）间的连接断开；电源设备（202），用于通过控制芯片（201）为核心系统（101）供电；检测设备（203），用于在控制芯片（201）控制核心系统（101）与蓄电池（102）间的连接断开、由电源设备（202）通过控制芯片（201）为核心系统（101）供电、且终端为指定状态时，检测电源设备（202）的输出电流，检测得到的输出电流为终端在指定状态下的漏电流。该终端的漏电流检测电路，无需拆卸下蓄电池，便能够实现终端漏电流的检测。

Description

一种终端的漏电流检测电路及终端 技术领域
本发明涉及电子技术领域，特别涉及一种终端的漏电流检测电路及终端。
背景技术
终端漏电流是检验终端产品(如手机、平板电脑等)是否合格的一项重要标准。目前常见的终端产品结构如图1所示，包括核心系统101、蓄电池102、USB(Universal Serial Bus，通用串行总线)接口103、充电芯片104、电池保护电路105，其中：
核心系统101，终端实现各项功能的核心部分；
蓄电池102，用于为核心系统101提供工作电源；
USB接口103，用于连接终端充电器；终端充电器通过USB接口103的Vbus端子输入充电电压；
充电芯片104，将终端充电器通过USB接口103的Vbus端子输入的充电电压进行电压变换后输出；
电池保护电路105，蓄电池102通过电池保护电路105与核心系统101的供电端、充电芯片104的输出端相连；具体的，电池保护电路105主要包括充电开关、放电开关和电池保护IC(Integrated Circuit，集成电路)，电池保护IC可以控制充电开关和放电开关的通断状态，进而控制蓄电池102的充放电状态，对蓄电池102进行保护。
现有技术中，终端的漏电流检测只能在终端未安装蓄电池时进行。然而，目前的很多终端均是蓄电池不可拆卸的结构设计，即无法进行终端的漏电流检测。
发明内容
本发明实施例提供一种终端的漏电流检测电路及终端，能够在不拆卸蓄 电池时实现终端漏电流的检测。
第一方面，提供一种终端的漏电流检测电路，包括控制芯片、电源设备和检测设备，其中：
所述控制芯片，用于连接所述电源设备，将所述电源设备输入的电压输出至所述终端的核心系统，以及控制所述终端的核心系统与所述终端的蓄电池间的连接断开；
所述电源设备，用于通过所述控制芯片为所述核心系统供电；
所述检测设备，用于在所述控制芯片控制所述核心系统与所述蓄电池间的连接断开、由所述电源设备通过所述控制芯片为所述核心系统供电、且所述终端为指定状态时，检测所述电源设备的输出电流，检测得到的所述输出电流为所述终端在所述指定状态下的漏电流。
结合第一方面，在第一种可能的实现方式中，所述电源设备具体为程控电源。
结合第一方面，或者第一方面的第一种可能的实现方式，在第二种可能的实现方式中，所述控制芯片控制所述终端的核心系统与所述终端的蓄电池间的连接断开，具体通过下述方式实现：
所述控制芯片控制所述终端的电池保护电路中的充电开关和放电开关处于断开状态。
结合第一方面，第一方面的第一种可能的实现方式，或者第一方面的第二种可能的实现方式，在第三种可能的实现方式中，所述指定状态为关机状态或待机状态。
第二方面，提供一种终端，包括控制芯片；在检测所述终端在指定状态下的漏电流时，所述控制芯片连接电源设备，所述控制芯片将所述电源设备输入的电压输出至所述终端的核心系统，为所述核心系统供电，以及控制所述核心系统与所述终端的蓄电池间的连接断开；其中，所述电源设备的输出电流即为所述终端在所述指定状态下的漏电流。
结合第二方面，在第一种可能的实现方式中，所述控制芯片具体通过所 述终端的通用串行总线USB接口的ID端子连接电源设备。
结合第二方面，或者第二方面的第一种可能的实现方式，在第二种可能的实现方式中，所述电源设备具体为程控电源。
结合第二方面，第二方面的第一种可能的实现方式，或者第二方面的第二种可能的实现方式，在第三种可能的实现方式中，所述控制芯片控制所述核心系统与所述终端的蓄电池间的连接断开，具体通过下述方式实现：
所述控制芯片控制所述终端的电池保护电路中的充电开关和放电开关处于断开状态。
结合第二方面，第二方面的第一种可能的实现方式，第二方面的第二种可能的实现方式，或者第二方面的第三种可能的实现方式，在第四种可能的实现方式中，所述指定状态为关机状态或待机状态。
根据第一方面提供的终端的漏电流检测电路，第二方面提供的终端，设置控制芯片控制终端的核心系统与蓄电池间的连接断开，仅利用电源设备通过控制芯片为核心系统供电，在终端为指定状态时检测电源设备的输出电流，检测得到的输出电流即为终端在该指定状态下的漏电流；显然，采用本发明实施例提供的终端，无需拆卸下蓄电池，便能够实现漏电流的检测。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明实施例一起用于解释本发明，并不构成对本发明的限制。在附图中：
图1为目前常见的终端结构示意图；
图2为本发明实施例1提供的终端的漏电流检测电路的示意图；
图3为本发明实施例2提供的终端的结构示意图；
图4为本发明实施例2提供的终端的详细结构示意图；
图5为本发明实施例2提供的终端的关机漏电流的检测过程的示意图。
具体实施方式
为了给出无需拆卸下蓄电池，便能够进行终端漏电流检测的实现方案，本发明实施例提供了一种终端的漏电流检测电路及终端，以下结合说明书附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。并且在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
实施例1：
本发明实施例1提供一种终端的漏电流检测电路，如图2所示，包括控制芯片201、电源设备202和检测设备203，其中：
控制芯片201，用于连接电源设备202，将电源设备202输入的电压输出至终端的核心系统101，以及控制终端的核心系统101与终端的蓄电池102间的连接断开；
电源设备202，用于通过控制芯片201为核心系统101供电；
检测设备203，用于在控制芯片201控制核心系统101与蓄电池102间的连接断开、由电源设备202通过控制芯片201为核心系统101供电、且终端为指定状态时，检测电源设备203的输出电流，检测得到的输出电流为终端在指定状态下的漏电流。
本发明实施例提供的漏电流检测电路可应用于手机、平板电脑、音乐播放器等各种终端。
即本发明实施例提供的漏电流检测电路，在终端的核心系统101与蓄电池102间的连接断开状态下，仅利用电源设备202为核心系统101供电，电源设备202的输出电流即为终端在指定状态下的漏电流，因此，无需拆卸下蓄电池，便能够实现漏电流的检测。
上述指定状态具体可以为关机状态，也可以为待机状态。即本发明实施例提供的终端无论检测关机漏电流，或是检测待机漏电流，均无需拆卸下蓄电池。
在终端的核心系统101与蓄电池102间的连接断开状态下，仅利用电源设备202为核心系统101供电时，若电源设备202通过终端的充电芯片104为核心系统101供电，充电芯片104的电压变换过程会消耗一定的功耗，导致无法精确检测出终端的漏电流，因此，本发明实施例提供的漏电流检测电路中，电源设备202通过控制芯片201为核心系统101供电，控制芯片201仅进行电压转发，不进行电压变换，从而能够保证漏电流的检测精度。
其中，控制芯片201和终端的核心系统101之间的连接，具体可以采用多种方式实现。例如，控制芯片201可以通过USB接口、音频接口、SIM(Subscriber Identity Module，客户识别模块)卡槽、存储卡槽等现有接口连接核心系统101；也可以在终端新增接口实现控制芯片201和终端的核心系统101之间的连接。
进一步的，控制芯片201控制终端的核心系统101与终端的蓄电池102间的连接断开，可以通过多种方式实现，本发明对此不做限定。例如，在本发明的一个具体实施例中，控制芯片201可以控制终端的电池保护电路105中的充电开关和放电开关处于断开状态，从而实现核心系统101与蓄电池102间的连接断开；在本发明的其它具体实施例中，控制芯片201也可以通过其它方式控制核心系统101与蓄电池102间的连接断开。
当控制芯片201通过控制终端的电池保护电路105实现核心系统101与蓄电池102间的连接断开时，控制芯片201和电池保护电路105之间的连接，具体也可以采用多种方式实现，在此不再举例说明，实际实施时，可以根据实际应用场景来确定具体的实现方案。
较佳的，上述电源设备202具体可以为程控电源，安全性、可靠性较高。
进一步的，上述检测设备203具体可以为现有的各种电流检测仪器。
当本发明实施例提供的漏电流检测电路用于检测终端的关机漏电流时，检测设备203，具体用于在控制芯片201控制核心系统101与蓄电池102间的连接断开、由电源设备202通过控制芯片201为核心系统101供电、且终端为关机状态时，检测电源设备203的输出电流，检测得到的输出电流为终端 在关机状态下的漏电流。当本发明实施例提供的漏电流检测电路用于检测终端的待机漏电流时，检测设备203，具体用于在控制芯片201控制核心系统101与蓄电池102间的连接断开、由电源设备202通过控制芯片201为核心系统101供电、且终端为待机状态时，检测电源设备203的输出电流，检测得到的输出电流为终端在待机状态下的漏电流。
实施例2：
基于同一发明构思，本发明实施例2提供一种终端，如图3所示，包括控制芯片300；在检测终端在指定状态下的漏电流时，控制芯片300连接电源设备，控制芯片300将电源设备输入的电压输出至终端的核心系统101，为核心系统101供电，以及控制核心系统101与终端的蓄电池102间的连接断开；其中，电源设备的输出电流即为终端在指定状态下的漏电流。
本发明实施例提供的终端具体可以为手机、平板电脑、音乐播放器等各种终端。
上述指定状态具体可以为关机状态，也可以为待机状态。即本发明实施例提供的终端无论检测关机漏电流，或是检测待机漏电流，均无需拆卸下蓄电池，便能够实现检测。
进一步的，控制芯片300与电源设备之间的连接，可以通过多种方式实现。例如，控制芯片300可以通过终端的USB接口103连接电源设备；当USB接口103具体为mini USB接口时，mini USB接口包括VBUS端子、D+端子、D-端子、GND端子和ID端子，其中，ID端子通常只在OTG(On-The-Go)功能中才使用，因此，控制芯片300具体可以通过USB接口103的ID端子连接电源设备；控制芯片300也可以采用其它方式与电源设备连接，在此不再举例。实际实施时，可以根据实际应用场景来确定具体的实现方案。
较佳的，上述电源设备具体可以为程控电源，安全性、可靠性较高。
进一步的，控制芯片300控制核心系统101与蓄电池102间的连接断开，也可以通过多种方式实现，本发明对此不做限定。例如，在本发明的一个具 体实施例中，控制芯片300可以控制终端的电池保护电路105中的充电开关和放电开关处于断开状态，从而实现核心系统101与蓄电池102间的连接断开；在本发明的其它具体实施例中，控制芯片300也可以通过其它方式控制核心系统101与蓄电池102间的连接断开。
实际实施时，在进行漏电流检测时，控制芯片300可以通过终端USB接口103先连接PC(Personal Computer，个人计算机)，由PC向控制芯片300下发指令，触发控制芯片300控制核心系统101与蓄电池102间的连接断开。
下面结合附图，以关机漏电流的检测为例，对本发明实施例提供的终端在关机状态下的漏电流检测过程进行描述。
在下述具体实施例中，终端采用的电池保护电路105具体如图3所示，主要包括S-82XX系列电池保护IC、充电开关SW1和放电开关SW2，其中，电池保护IC的控制端CTL为充电开关SW1及放电开关SW2的控制端子，因此控制芯片300通过控制端CTL可以控制充电开关SW1和放电开关SW2的通断状态，进而控制核心系统101与蓄电池102间的连接的通断状态。采用的电源设备具体为程控电源。
终端的关机漏电流检测过程如图5所示，具体包括：
步骤501、终端连接PC，PC向终端的控制芯片300下发指令，指示控制芯片300控制核心系统101与蓄电池102间的连接断开。
步骤502、控制芯片300接收到PC发送的指令后，控制核心系统101与蓄电池102间的连接断开。
具体的，控制芯片300向电池保护电路105中电池保护IC的控制端CTL输出预设信号；电池保护IC的控制端CTL在输入预设信号时，通过充电开关控制端子CO输出控制信号控制充电开关SW1断开，通过放电开关控制端子DO输出控制信号控制放电开关SW2断开，即实现了控制核心系统101与蓄电池102间的连接断开。
步骤503、断开终端与PC的连接，控制芯片300通过USB接口103的ID端子连接程控电源，将程控电源输入的电压输出至核心系统101。
实际实施时，可以通过程控电源控制板实现控制芯片300通过USB接口103的ID端子连接程控电源。
此时，核心系统101仅由程控电源进行供电，程控电源可以根据核心系统101的供电需求输出相应电压。
步骤504、利用检测设备检测程控电源的输出电流，该电流即为终端的关机漏电流。
本发明实施例提供的终端的待机漏电流检测过程与关机漏电流检测过程类似，在此不再举例详述。
可见，采用本发明实施例提供的终端，设置控制芯片控制终端的核心系统与蓄电池间的连接断开，仅利用电源设备为核心系统供电，在终端为指定状态时检测电源设备的输出电流，检测得到的输出电流即为终端在该指定状态下的漏电流；显然，采用本发明实施例提供的终端，无需拆卸下蓄电池，便能够实现漏电流的检测，进而能够保证终端产品的可靠性，并且方案易于实现，成本较低。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (9)

  1. 一种终端的漏电流检测电路，其特征在于，包括控制芯片、电源设备和检测设备，其中：
    所述控制芯片，用于连接所述电源设备，将所述电源设备输入的电压输出至所述终端的核心系统，以及控制所述终端的核心系统与所述终端的蓄电池间的连接断开；
    所述电源设备，用于通过所述控制芯片为所述核心系统供电；
    所述检测设备，用于在所述控制芯片控制所述核心系统与所述蓄电池间的连接断开、由所述电源设备通过所述控制芯片为所述核心系统供电、且所述终端为指定状态时，检测所述电源设备的输出电流，检测得到的所述输出电流为所述终端在所述指定状态下的漏电流。
  2. 如权利要求1所述的电路，其特征在于，所述电源设备具体为程控电源。
  3. 如权利要求1或2所述的电路，其特征在于，所述控制芯片控制所述终端的核心系统与所述终端的蓄电池间的连接断开，具体通过下述方式实现：
    所述控制芯片控制所述终端的电池保护电路中的充电开关和放电开关处于断开状态。
  4. 如权利要求1-3任一所述的电路，其特征在于，所述指定状态为关机状态或待机状态。
  5. 一种终端，其特征在于，包括控制芯片；在检测所述终端在指定状态下的漏电流时，所述控制芯片连接电源设备，所述控制芯片将所述电源设备输入的电压输出至所述终端的核心系统，为所述核心系统供电，以及控制所述核心系统与所述终端的蓄电池间的连接断开；其中，所述电源设备的输出电流即为所述终端在所述指定状态下的漏电流。
  6. 如权利要求5所述的终端，其特征在于，所述控制芯片具体通过所述终端的通用串行总线USB接口的ID端子连接电源设备。
  7. 如权利要求5或6所述的终端，其特征在于，所述电源设备具体为程控电源。
  8. 如权利要求5-7任一所述的终端，其特征在于，所述控制芯片控制所述核心系统与所述终端的蓄电池间的连接断开，具体通过下述方式实现：
    所述控制芯片控制所述终端的电池保护电路中的充电开关和放电开关处于断开状态。
  9. 如权利要求5-8任一所述的终端，其特征在于，所述指定状态为关机状态或待机状态。
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