WO2014161394A1 - 一种移动终端充电温度保护方法及装置 - Google Patents

一种移动终端充电温度保护方法及装置 Download PDF

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Publication number
WO2014161394A1
WO2014161394A1 PCT/CN2014/072170 CN2014072170W WO2014161394A1 WO 2014161394 A1 WO2014161394 A1 WO 2014161394A1 CN 2014072170 W CN2014072170 W CN 2014072170W WO 2014161394 A1 WO2014161394 A1 WO 2014161394A1
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Prior art keywords
charger
resistance
resistor
temperature sensor
thermistor temperature
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PCT/CN2014/072170
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English (en)
French (fr)
Inventor
梁锡林
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中兴通讯股份有限公司
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Publication of WO2014161394A1 publication Critical patent/WO2014161394A1/zh

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/007188Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature

Definitions

  • the present invention relates to the field of mobile terminals with battery charging, such as mobile phones and data cards, and more particularly to a mobile terminal charging temperature protection method and apparatus.
  • the data line or charger is slightly short-circuited inside the plug, and the micro-short circuit cannot reach the short-circuit protection condition of the charger, causing the charger to continuously output power, and the data plug is converted into heat, which eventually causes the data line or the charger plug or the mobile phone interface to be heated and melted.
  • smoking, fire, etc. existing mobile phone terminals in the market
  • the probability of this problem and the impact of this problem It is also getting more and more serious, so it will become more and more urgent to solve such problems.
  • the security of the terminal product charger on the market only performs some safety detection and protection on the battery part and the mobile phone part.
  • the temperature identification circuit for the battery protection board is only the temperature added on the battery protection board.
  • the identification circuit can only solve the problem of abnormal heating of the battery.
  • the temperature protection of the charger and terminal interface parts has not been implemented, but market problems have generally occurred, and some high-end customers have also proposed the safety protection requirements.
  • the current terminal battery capacity and charger power are still relatively small, and the future will be wide with large-capacity batteries and high-power chargers. In general, the problem will be more prominent.
  • Embodiments of the present invention provide a method and a device for protecting a charging temperature of a mobile terminal, so as to solve the problem of safety of a connector that is connected to the output terminal of the charger when the mobile phone is charged with a micro short circuit.
  • An embodiment of the present invention provides a method for protecting a charging temperature of a mobile terminal, including:
  • a thermistor temperature sensor mounted on the head of the mobile terminal charger connector detects the heat of the connector head in real time
  • the resistance value of the resistor in the thermistor temperature sensor changes with the rise of the temperature, and the resistance whose resistance value changes makes the charger loop resistance satisfy.
  • the output power of the charger is turned off or reduced.
  • the thermistor temperature sensor uses a positive temperature coefficient (PTC) resistor, or a negative temperature coefficient (NTC) resistor, or a negative temperature coefficient (NTC) resistor.
  • PTC positive temperature coefficient
  • NTC negative temperature coefficient
  • NTC negative temperature coefficient
  • the charger protection condition includes:
  • the charger loop resistance is greater than the voltage regulator resistance protection threshold
  • the charger loop resistance is less than the overcurrent protection threshold.
  • the resistance of the resistor in the thermistor temperature sensor changes with the temperature rise, and the resistance whose resistance changes causes the charging
  • the output power of the charger is turned off or reduced, including:
  • the resistance value of the PTC resistor in the thermistor temperature sensor becomes larger as the temperature rises, and the PTC resistor whose resistance value becomes larger increases the resistance of the charger circuit, and when the resistance of the charger circuit is greater than the threshold value of the resistance resistor, The voltage stabilizing function unit of the charger reduces the output power of the charger.
  • the resistance of the resistor in the thermistor temperature sensor changes as the temperature rises, and the resistance whose resistance changes causes charging.
  • Output power including:
  • the resistance value of the NTC resistor in the thermistor temperature sensor becomes larger as the temperature rises, and the NTC resistor whose resistance value becomes larger makes the charger loop resistance smaller.
  • the overcurrent protection circuit of the charger turns off or reduces the output power of the charger.
  • the resistance value of the resistor in the thermistor temperature sensor changes with the temperature rise, and the resistance value
  • the changed resistance causes the charger loop resistance to meet the charger protection condition, turning off or reducing the output power of the charger includes:
  • the resistance value of the resistor in the thermistor temperature sensor changes with the rise of the temperature, and the resistance of the resistance change causes the charger loop resistance to become smaller than the overcurrent protection threshold, and the overcurrent protection circuit of the charger is turned off. Or reducing the output power of the charger, and the resistance of the resistance change causes the charger loop resistance to increase to the regulator resistor protection threshold, and the voltage regulator function unit of the charger reduces the output power of the charger.
  • the embodiment of the invention further provides a charging temperature protection device for a mobile terminal, comprising: a thermistor temperature sensor, which is configured to: mount the head of the charger connector of the mobile terminal to detect the heat of the connector head in real time;
  • the processing unit is configured to: when the thermistor temperature sensor detects the temperature rise of the connector head, determine that the resistance value of the resistor in the thermistor temperature sensor changes the charger loop resistance to satisfy the charger protection condition At the time, the output power of the charger is turned off or lowered.
  • the thermistor temperature sensor is connected to a positive temperature coefficient PTC resistor, or is incorporated into a negative temperature coefficient NTC resistor, or is incorporated into the NTC resistor while being serially connected to the PTC resistor. Combination method.
  • the charger protection condition includes:
  • the charger loop resistance is greater than the voltage regulator resistance protection threshold
  • the charger loop resistance is less than the overcurrent protection threshold.
  • the processing unit is configured to turn off or reduce the output power of the charger in the following manner: in the thermistor temperature sensor, the resistance makes the charger loop resistance greater than When the voltage regulator resistor protects the threshold, the voltage regulator function unit of the charger is called to reduce the output power of the charger.
  • the processing unit is configured to turn off or reduce the output power of the charger in the following manner: in the thermistor temperature sensor, the resistance causes the charger loop resistance to be less than the overcurrent protection threshold When the overcurrent protection circuit of the charger is called, the output power of the charger is turned off.
  • the thermistor temperature sensor installed at the connector head, when the abnormality occurs, the temperature rises, the PTC resistance of the thermistor temperature sensor or the NTC resistance changes, when the resistance reaches the overcurrent of the charger or When the short-circuit protection threshold is reached, the charger turns off the output and the temperature drops, thereby protecting the charger or data line head from damage.
  • FIG. 3 is a schematic structural diagram of a charging temperature protection device for a mobile terminal according to the embodiment
  • FIG. 4 is a schematic structural diagram of a charging temperature protection device for a mobile terminal according to the embodiment.
  • the inventor of the present application proposes a mobile terminal charging temperature protection method, comprising the following operations: a thermistor temperature sensor mounted on a head of a mobile terminal charger connector detects the heat of the connector head in real time;
  • the thermistor is detected when the thermistor temperature sensor detects a temperature rise of the connector head
  • the resistance value of the resistance in the temperature sensor changes with the rise of the temperature, and the resistance whose resistance changes causes the charger loop resistance to satisfy the charger protection condition, and the output power of the charger is turned off or reduced.
  • the thermistor temperature sensor can be used in series with the PTC resistor, or can be incorporated into the NTC and the charger protection conditions include at least the following two:
  • the charger loop resistance is greater than the voltage regulator resistance protection threshold
  • the charger loop resistance is less than the overcurrent protection threshold.
  • the charger's voltage regulator function unit can reduce the charger's output power.
  • the resistance of the NTC resistor in the thermistor temperature sensor becomes larger as the temperature rises, and the NTC resistor whose resistance becomes larger makes the charger loop resistance smaller.
  • the charger loop resistance is less than the overcurrent protection threshold, the charger's overcurrent protection circuit turns off or reduces the charger's output power.
  • the thermistor temperature sensor When the thermistor temperature sensor is incorporated into the NTC resistor while being connected to the PTC resistor, the resistance of the resistor in the thermistor temperature sensor changes with the rise of temperature, and if the resistance changes, the resistance of the charger loop changes. As small as the overcurrent protection threshold, the overcurrent protection circuit of the charger turns off or reduces the output power of the charger. If the resistance of the resistance changes the resistance of the charger loop to the threshold of the regulated resistor, the charger The voltage regulator function unit reduces the output power of the charger.
  • the CR power curve of the circuit power supply during the charging temperature protection process of the mobile terminal shown in Fig. 1 can be obtained, and the characteristics of the output CR curve of different power chargers can be seen.
  • the charger output power is approximately 0W.
  • the normal PTC resistance is 10 milliohms, and the NTC resistance is 1000 ohms, so the normal operation of the charger is not affected after implantation.
  • the charger output is slightly short-circuited (for example, the direct resistance of the power supply and ground is greater than 2 ohms and less than 20 ohms)
  • the charger does not reach the short-circuit protection start condition, and the charger continuously outputs high power, charging.
  • the connector head of the output of the device continues to generate heat.
  • the heat reaches 80-100 degrees, the PTC resistance suddenly increases, and the NTC resistance decreases. Is 0.
  • This embodiment introduces a mobile terminal charging temperature protection device. As shown in FIG. 3, the following two parts are included: the thermistor temperature sensor 31 and the processing unit 32.
  • the thermistor temperature sensor 31 mounted on the head of the mobile terminal charger connector is used to: detect the heat of the connector head in real time;
  • the thermistor temperature sensor 31 can be connected to the PTC resistor or incorporated into the NTC resistor.
  • the processing unit 32 is configured to: determine the thermal sensitivity when the thermistor temperature sensor 31 detects the temperature rise of the connector head. The change in the resistance of the resistor in the resistance temperature sensor 31 turns off or lowers the output power of the charger when the charger loop resistance satisfies the charger protection condition.
  • the above charger protection conditions include at least the following two types, but are not limited to the two types:
  • the charger loop resistance is greater than the voltage regulator resistance protection threshold
  • the charger loop resistance is less than the overcurrent protection threshold.
  • the processing unit 32 is configured to turn off or reduce the output power of the charger in the following manner: when the resistance in the thermistor temperature sensor 31 causes the charger loop resistance to be greater than the voltage resistance protection threshold, the charger is stabilized.
  • the voltage function unit reduces the output power of the charger.
  • the processing unit 32 is configured to turn off or reduce the output power of the charger in the following manner: when the resistance in the thermistor temperature sensor 31 causes the charger loop resistance to be less than the overcurrent protection threshold, the overcurrent of the charger is invoked.
  • the protection circuit turns off or reduces the output power of the charger.
  • the implementation manner of the above mobile terminal charging temperature protection device can be seen in FIG. 4. It includes an alternating current-direct current (AC-DC) module 102, a DC-DC module 103, a rectification filter 104, an output DC cable 105, a voltage stabilization circuit 106, and a pulse width modulation (PWM).
  • the control module 107 and the charger output protection circuit include a short circuit protection circuit 108, an overcurrent protection circuit 109, an overvoltage protection circuit 110, and the like, and a connector and the thermistor temperature sensor 101.
  • the thermistor temperature sensor 101 is inserted into the thermistor temperature sensor device PTC1Ola or incorporated into the NTC device 101b at the connector head of the charger or the data line, or both of them are implanted for better safety effect. Device. Thereby, the heat of the connector head can be detected. When the temperature rise of the connector head is detected, the resistance in the thermistor temperature sensor 101 also changes with the temperature rise, and the changed resistance reaches the preset charger protection condition. When controlling the charger to turn off the output or reduce the output power. For example, when the resistance of the thermistor temperature sensor 101 makes the charger loop resistance become large, once the charger loop resistance is greater than the voltage regulator resistance protection threshold, the voltage regulator function unit of the charger, that is, the voltage regulator circuit in FIG.
  • the charger's overcurrent protection circuit turns off or reduces the charger's output power.
  • thermistor temperature sensor can be mounted on a printed circuit board (Printed
  • the thermistor temperature sensor can be mounted on the PCB using plug-in wave soldering, chip resistor reflow soldering, or "buried".
  • plug-in wave soldering chip resistor reflow soldering
  • buried the way of "buried resistance” is divided into two types, one is to directly embed the thermistor, and the other is to use a "thermistor” made of a resistive material.
  • the charger or the data line head can be protected from damage, the security problem is solved, and the cost is low, and the implementation is simple and reliable.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Protection Of Static Devices (AREA)

Abstract

一种移动终端充电温度保护方法及装置。所述方法包括:安装在移动终端充电器连接器头部的热敏电阻温度传感器实时检测连接器头部的热量;以及当所述热敏电阻温度传感器检测到连接器头部的温度上升时,该热敏电阻温度传感器中电阻的阻值随着温度的上升而变化,阻值发生变化的电阻使充电器回路电阻满足充电器保护条件时,关断或降低所述充电器的输出功率。

Description

一种移动终端充电温度保护方法及装置
技术领域
本发明涉及手机和数据卡等带电池充电的移动终端领域, 尤其涉及一种 移动终端充电温度保护方法及装置。
背景技术
随着移动终端技术的发展, 用户需求的功能越来越多, 屏幕尺寸越来越 大, 终端的电池容量需求也越来越大, 因此所需要给手机充电的充电器功率 越来越大, 在这种大电流的充电过程中不少终端用户都遇到了充电器输出端 子的连接器在手机充电时发生微短路后烧融的安全问题, 特别是目前全球推 荐通用的微型通用串行总线(Micro Universal Serial Bus, Micro USB )型连 接器, 由于结构尺寸限制, 用户在使用过程中, 异物进入, 插头插座斜向插 拔破损, 插头用力过大弯折折断, 形成大量导电液体和金属粉末, 造成数据 线或充电器在插头内部微短路, 微短路无法达到充电器短路保护条件, 导致 充电器持续输出功率, 在数据线插头转化形成热量, 最终导致数据线或充电 器插头或手机接口受热熔化、 冒烟、 起火等, 在市场上现有品牌的手机终端 都有出现过类似问题, 这个问题使得用户对手机的使用安全担忧, 严重的对 用户的人身和财产造成损坏, 而且在日本和欧美等高端市场对此类电气产品 安全问题规范比较严格, 此类问题属于产品安全性事件, 甚至在国家法律上 有要求, 故障达到一定级别将面临产品的全部召回和严厉处罚, 随着未来终 端产品电池容量越来越大,出现此问题的几率和此问题的影响也越来越严重, 因此对此类问题解决将越来越迫切。
目前市场上的终端产品充电器安全性仅仅对电池部分, 和手机部分做一 些安全性检测和防护, 如, 201010596579.4中, 用于电池保护板的温度识别 电路仅仅是在电池保护板上增加的温度识别电路, 只能解决电池充电异常发 热问题。 而对于充电器和终端接口部分的温度保护都还未实施, 但市场问题 却普遍发生, 一些高端客户也提出了该安全性保护的要求。 一方面目前终端 电池容量和充电器功率还比较小, 未来随着大容量电池和大功率充电器的广 泛应用, 该问题的发生将更加突出。
发明内容
本发明实施例提供一种移动终端充电温度保护方法及装置, 以解决充电 器输出端子的连接器在手机充电时发生微短路后烧融的安全问题。
本发明实施例提供了一种移动终端充电温度保护方法, 包括:
安装在移动终端充电器连接器头部的热敏电阻温度传感器实时检测连接 器头部的热量; 以及
当所述热敏电阻温度传感器检测到连接器头部的温度上升时, 该热敏电 阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值发生变化的电阻使 充电器回路电阻满足充电器保护条件时,关断或降低所述充电器的输出功率。
可选地, 上述方法中, 所述热敏电阻温度传感器釆用串入正温度系数 ( Positive Temperature Coefficient , PTC ) 电阻, 或釆用并入负温度系数 ( NegativeTemperature Coefficient, NTC ) 电阻, 或釆用串入 PTC电阻的同 时并入 NTC电阻的组合方式。
可选地, 上述方法中, 所述充电器保护条件包括:
充电器回路电阻大于稳压电阻保护门限值;
充电器回路电阻小于过流保护门限值。
可选地,上述方法中,当所述热敏电阻温度传感器釆用串入 PTC电阻时, 热敏电阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值发生变化的 电阻使充电器回路电阻满足充电器保护条件时, 关断或降低所述充电器的输 出功率, 包括:
热敏电阻温度传感器中 PTC电阻的阻值随着温度的上升而变大,阻值变 大的 PTC电阻使充电器回路电阻变大,充电器回路电阻大于稳压电阻保护门 限值时, 所述充电器的稳压功能单元降低所述充电器的输出功率。
可选地,上述方法中,当所述热敏电阻温度传感器釆用并入 NTC电阻时, 热敏电阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值发生变化的 电阻使充电器回路电阻满足充电器保护条件时, 关断或降低所述充电器的输 出功率, 包括:
热敏电阻温度传感器中 NTC电阻的阻值随着温度的上升而变大,阻值变 大的 NTC电阻使充电器回路电阻变小,当充电器回路电阻小于过流保护门限 值时, 所述充电器的过流保护电路关断或降低所述充电器的输出功率。
可选地, 上述方法中, 当所述热敏电阻温度传感器釆用串入 PTC电阻的 同时并入 NTC电阻时,热敏电阻温度传感器中电阻的阻值随着温度的上升而 变化, 阻值发生变化的电阻使充电器回路电阻满足充电器保护条件时, 关断 或降低所述充电器的输出功率, 包括:
热敏电阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值变化的 电阻使充电器回路电阻变小至过流保护门限值时, 所述充电器的过流保护电 路关断或降低所述充电器的输出功率, 阻值变化的电阻使充电器回路电阻变 大至稳压电阻保护门限值时, 所述充电器的稳压功能单元降低所述充电器的 输出功率。 本发明实施例还提供了一种移动终端充电温度保护装置, 包括: 热敏电阻温度传感器, 其设置成: 安装在移动终端充电器连接器头部, 实时检测连接器头部的热量; 以及
处理单元, 其设置成: 在所述热敏电阻温度传感器检测到连接器头部的 温度上升时, 判断该热敏电阻温度传感器中电阻的阻值的变化使充电器回路 电阻满足充电器保护条件时, 关断或降低所述充电器的输出功率。
可选地,上述装置中,所述热敏电阻温度传感器釆用串入正温度系数 PTC 电阻, 或釆用并入负温度系数 NTC电阻, 或釆用串入 PTC电阻的同时并入 NTC电阻的组合方式。
可选地, 上述装置中, 所述充电器保护条件包括:
充电器回路电阻大于稳压电阻保护门限值;
充电器回路电阻小于过流保护门限值。
可选地, 上述装置中, 所述处理单元是设置成以如下方式关断或降低所 述充电器的输出功率: 在热敏电阻温度传感器中电阻使充电器回路电阻大于 稳压电阻保护门限值时, 调用充电器的稳压功能单元降低所述充电器的输出 功率。
可选地, 上述装置中, 所述处理单元是设置成以如下方式关断或降低所 述充电器的输出功率: 在热敏电阻温度传感器中电阻使充电器回路电阻小于 过流保护门限值时, 调用所述充电器的过流保护电路关断或降低所述充电器 的输出功率。 本申请技术方案中, 通过安装在连接器头部的热敏电阻温度传感器, 当 异常出现时,温度上升,热敏电阻温度传感器的 PTC电阻或 NTC电阻变化, 当电阻达到充电器的过流或短路保护门限时, 充电器关断输出, 温度下降, 从而保护充电器或数据线头部不受损坏。 附图概述
图 1为本实施例中电路电源输出的 CR曲线图;
图 2为本实施例中充电温度保护的流程图;
图 3为本实施例中移动终端充电温度保护装置的结构示意图; 图 4为本实施例中移动终端充电温度保护装置的原理构架图。 本发明的较佳实施方式
下文将结合附图对本申请技术方案作详细说明。 需要说明的是, 在不冲 突的情况下, 本申请的实施例和实施例中的特征可以任意相互组合。
实施例 1
本申请发明人提出一种移动终端充电温度保护方法, 包括如下操作: 安装在移动终端充电器连接器头部的热敏电阻温度传感器实时检测连接 器头部的热量; 以及
当所述热敏电阻温度传感器检测到连接器头部的温度上升时, 该热敏电 阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值发生变化的电阻使 充电器回路电阻满足充电器保护条件时,关断或降低所述充电器的输出功率。
其中,热敏电阻温度传感器可以釆用串入 PTC电阻,或者釆用并入 NTC 而充电器保护条件至少包括如下两条:
充电器回路电阻大于稳压电阻保护门限值;
充电器回路电阻小于过流保护门限值。
当热敏电阻温度传感器釆用串入 PTC 电阻时, 热敏电阻温度传感器中 PTC电阻的阻值会随着温度的上升而变大,阻值变大的 PTC电阻使充电器回 路电阻变大, 充电器回路电阻大于稳压电阻保护门限值时, 充电器的稳压功 能单元即可降低充电器的输出功率。
当热敏电阻温度传感器釆用并入 NTC 电阻时, 热敏电阻温度传感器中 NTC电阻的阻值随着温度的上升而变大, 阻值变大的 NTC电阻使充电器回 路电阻变小, 当充电器回路电阻小于过流保护门限值时, 充电器的过流保护 电路关断或降低充电器的输出功率。
当热敏电阻温度传感器釆用串入 PTC电阻的同时并入 NTC电阻时, 热 敏电阻温度传感器中电阻的阻值随着温度的上升而变化, 若阻值变化的电阻 使充电器回路电阻变小至过流保护门限值, 充电器的过流保护电路关断或降 低充电器的输出功率, 若阻值变化的电阻使充电器回路电阻变大至稳压电阻 保护门限值, 充电器的稳压功能单元降低充电器的输出功率。
釆用上述方法进行充电温度保护, 可得到图 1所示的移动终端充电温度 保护过程中电路电源输出 CR曲线, 可以看出不同功率充电器输出 CR曲线 的特性。 当输出外加电阻小于 2欧姆或大于 200欧姆以上时, 充电器输出功 率基本接近为 0W。 正常 PTC电阻为 10毫欧, NTC电阻为千欧级, 所以植 入后不影响充电器正常工作。 当充电器输出发生微短路(比如, 电源和地直 接电阻大于 2欧姆小于 20欧姆)时, 从对应 CR曲线可以看出, 达不到充电 器短路保护启动条件, 充电器持续输出大功率, 充电器输出的连接器头部持 续发热, 当发热达到 80-100度时, PTC电阻突然增大, NTC电阻减小接近 为 0。
下面结合图 2介绍上述移动终端充电温度保护的过程。
从图 2中看出, 当用户正常使用时, 充电连接器接口无微短路发生时, 温度传感器温度正常, 温度传感器电阻值正常, 充电器可正常输出, 终端可 正常充电。 当用户使用异常, 充电连接器接口进入液体导电性金属粉末等, 发生充电连接器接口微短路, 微短路的充电器短路保护无法启动, 则充电器 持续输出功率, 在充电连接器头部转换成热量, 安装在连接器头部的温度传 感器温度升高,温度传感器电阻值变化,根据图 1充电器输出 CR曲线分析, 电阻变化可使充电器达到充电器保护条件, 充电器启动保护, 关闭输出, 从 而避免连接器头部温度继续升高, 同时避免安全性问题发生。
实施例 2
本实施例介绍了一种移动终端充电温度保护装置, 如图 3所示, 包括如 下两部分: 热敏电阻温度传感器 31和处理单元 32。
安装在移动终端充电器连接器头部的热敏电阻温度传感器 31用于:实时 检测连接器头部的热量;
其中,热敏电阻温度传感器 31可釆用串入 PTC电阻,或并入 NTC电阻, 处理单元 32用于: 在热敏电阻温度传感器 31检测到连接器头部的温度 上升时,判断该热敏电阻温度传感器 31中电阻的阻值的变化使充电器回路电 阻满足充电器保护条件时, 关断或降低所述充电器的输出功率。
上述充电器保护条件至少包括如下两种, 但不仅限于此两种:
充电器回路电阻大于稳压电阻保护门限值;
充电器回路电阻小于过流保护门限值。
处理单元 32是用于以如下方式关断或降低所述充电器的输出功率:在热 敏电阻温度传感器 31中电阻使充电器回路电阻大于稳压电阻保护门限值时, 调用充电器的稳压功能单元降低充电器的输出功率。 处理单元 32是用于以如下方式关断或降低所述充电器的输出功率:在热 敏电阻温度传感器 31中电阻使充电器回路电阻小于过流保护门限值时,调用 充电器的过流保护电路关断或降低充电器的输出功率。
在实际应用中,上述移动终端充电温度保护装置的实现方式可参见图 4。 其包括交流 -直流 ( Alternating Current-Direct Current, AC-DC )模块 102、 DC-DC模块 103、 整流滤波 104、 输出 DC线缆 105、 稳压电路 106、 脉冲宽 度调变 ( Pulse Width Modulation, PWM )控制模块 107、 充电器输出保护电 路, 其包括短路保护电路 108、 过流保护电路 109、 以及过压保护电路 110 等、 连接器及热敏电阻温度传感器 101。
其中, 热敏电阻温度传感器 101 , 通过在充电器或数据线的连接器头部 串入热敏电阻温度传感器件 PTClOla或并入 NTC器件 101b, 或为达到更好 的安全效果同时植入两种器件。 从而可以检测连接器头部的热量, 当检测到 连接器头部的温度上升, 热敏电阻温度传感器 101中的电阻也随着温度的上 升而变化, 变化的电阻达到预设的充电器保护条件时, 控制充电器关断输出 或降低输出功率即可。 例如, 热敏电阻温度传感器 101中电阻使充电器回路 电阻变大时, 一旦充电器回路电阻大于稳压电阻保护门限值, 则充电器的稳 压功能单元, 即图 4中的稳压电路 106降低充电器的输出功率。 当热敏电阻 温度传感器 101中电阻使充电器回路电阻变小时, 一旦充电器回路电阻小于 过流保护门限值时, 充电器的过流保护电路关断或降低充电器的输出功率。
需要说明的是, 热敏电阻温度传感器可以安装在一印刷电路板(Printed
Circuit Board, PCB )上, 而安装热敏电阻温度传感器的方式有多种, 本实施 例并不限制热敏电阻温度传感器的安装方式。 例如, 热敏电阻温度传感器可 釆用插件波峰焊、贴片电阻回流焊或者 "埋阻"的方式安装在 PCB上。其中, "埋阻" 的方式又分为两种, 一种是直接埋入热敏电阻, 另一种是用阻容材 料制作的 "热敏电阻" 。
从上述实施例可以看出, 本申请技术方案中, 在异常出现时, 通过安装 在插头部位的热敏电阻温度传感器电阻变化使充电器输出保护电路门限打开 , 充电器功率下降或关断输出, 使温度下降, 从而保护充电器或数据线头部不 受损坏。 解决了安全性问题, 而且成本低, 实现简单可靠。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如, 只 读存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使 用一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆 用硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本申请不限制于 任何特定形式的硬件和软件的结合。
以上所述仅为本发明的优选实施例而已, 并不用于限制本发明。 对于本 领域的技术人员来说, 本发明实施例可以有各种更改和变化。 凡在本发明的 精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明 所附权利要求的保护范围之内。
工业实用性
本申请技术方案中, 可保护充电器或数据线头部不受损坏, 解决了安全 性问题, 而且成本低, 实现简单可靠。

Claims

权利要求书
1、 一种移动终端充电温度保护方法, 包括:
安装在移动终端充电器连接器头部的热敏电阻温度传感器实时检测所述 连接器头部的热量; 以及
当所述热敏电阻温度传感器检测到所述连接器头部的温度上升时, 所述 热敏电阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值发生变化的 电阻使充电器回路电阻满足充电器保护条件时, 关断或降低所述充电器的输 出功率。
2、如权利要求 1所述的方法, 其中, 所述热敏电阻温度传感器釆用串入 正温度系数 PTC电阻, 或釆用并入负温度系数 NTC电阻, 或釆用串入 PTC 电阻的同时并入 NTC电阻的组合方式。
3、 如权利要求 2所述的方法, 其中, 所述充电器保护条件包括: 充电器回路电阻大于稳压电阻保护门限值;
充电器回路电阻小于过流保护门限值。
4、如权利要求 3所述的方法, 其中, 当所述热敏电阻温度传感器釆用所 述串入 PTC电阻时,所述热敏电阻温度传感器中电阻的阻值随着温度的上升 而变化, 阻值发生变化的电阻使充电器回路电阻满足充电器保护条件时, 关 断或降低所述充电器的输出功率, 包括:
所述热敏电阻温度传感器中 PTC电阻的阻值随着温度的上升而变大,阻 值变大的 PTC电阻使充电器回路电阻变大,所述充电器回路电阻大于稳压电 阻保护门限值时, 所述充电器的稳压功能单元降低所述充电器的输出功率。
5、如权利要求 3所述的方法, 其中, 当所述热敏电阻温度传感器釆用所 述并入 NTC电阻时,所述热敏电阻温度传感器中电阻的阻值随着温度的上升 而变化, 阻值发生变化的电阻使充电器回路电阻满足充电器保护条件时, 关 断或降低所述充电器的输出功率, 包括:
所述热敏电阻温度传感器中 NTC电阻的阻值随着温度的上升而变大,阻 值变大的 NTC电阻使充电器回路电阻变小,当充电器回路电阻小于过流保护 门限值时, 所述充电器的过流保护电路关断或降低所述充电器的输出功率。
6、如权利要求 3所述的方法, 其中, 当所述热敏电阻温度传感器釆用串 入 PTC电阻的同时并入 NTC电阻时, 所述热敏电阻温度传感器中电阻的阻 值随着温度的上升而变化, 阻值发生变化的电阻使充电器回路电阻满足充电 器保护条件时, 关断或降低所述充电器的输出功率, 包括:
所述热敏电阻温度传感器中电阻的阻值随着温度的上升而变化, 阻值变 化的电阻使充电器回路电阻变小至过流保护门限值时, 所述充电器的过流保 护电路关断或降低所述充电器的输出功率, 阻值变化的电阻使充电器回路电 阻变大至稳压电阻保护门限值时, 所述充电器的稳压功能单元降低所述充电 器的输出功率。
7、 一种移动终端充电温度保护装置, 包括:
热敏电阻温度传感器, 其设置成: 安装在移动终端充电器连接器头部, 实时检测所述连接器头部的热量; 以及
处理单元, 其设置成: 在所述热敏电阻温度传感器检测到所述连接器头 部的温度上升时, 判断所述热敏电阻温度传感器中电阻的阻值的变化使充电 器回路电阻满足充电器保护条件时, 关断或降低所述充电器的输出功率。
8、如权利要求 7所述的装置, 其中, 所述热敏电阻温度传感器釆用串入 正温度系数 PTC电阻, 或釆用并入负温度系数 NTC电阻, 或釆用串入 PTC 电阻的同时并入 NTC电阻的组合方式。
9、 如权利要求 8所述的装置, 其中, 所述充电器保护条件包括: 充电器回路电阻大于稳压电阻保护门限值;
充电器回路电阻小于过流保护门限值。
10、 如权利要求 9所述的装置, 其中,
所述处理单元是设置成以如下方式关断或降低所述充电器的输出功率: 在所述热敏电阻温度传感器中电阻使充电器回路电阻大于稳压电阻保护门限 值时, 调用充电器的稳压功能单元降低所述充电器的输出功率。
11、 如权利要求 9所述的装置, 其中,
所述处理单元是设置成以如下方式关断或降低所述充电器的输出功率: 在所述热敏电阻温度传感器中电阻使充电器回路电阻小于过流保护门限值时, 调用所述充电器的过流保护电路关断或降低所述充电器的输出功率。
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WO2006077758A1 (ja) * 2005-01-18 2006-07-27 Nec Corporation 携帯端末及び携帯端末におけるバッテリの充電方法
US8120328B2 (en) * 2006-03-24 2012-02-21 Nec Corporation Charging system, charging control program, and portable terminal
CN202405549U (zh) * 2011-12-20 2012-08-29 上海通用汽车有限公司 充电连接器及充电连接装置

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CN113344151A (zh) * 2021-04-16 2021-09-03 中国农业大学 一种冷链温度自适应调整的故障辨析示警调控装置与方法
CN113344151B (zh) * 2021-04-16 2023-08-25 中国农业大学 一种冷链温度自适应调整的故障辨析示警调控装置与方法
CN115489366A (zh) * 2022-10-10 2022-12-20 鸿洋集团有限公司 一种充电桩损耗自检的方法及利用其检测充电口的方法

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