CN102183315A - Circuit and method for detecting identity (ID) and temperature of battery by using common detection pin - Google Patents
Circuit and method for detecting identity (ID) and temperature of battery by using common detection pin Download PDFInfo
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- CN102183315A CN102183315A CN2011100477375A CN201110047737A CN102183315A CN 102183315 A CN102183315 A CN 102183315A CN 2011100477375 A CN2011100477375 A CN 2011100477375A CN 201110047737 A CN201110047737 A CN 201110047737A CN 102183315 A CN102183315 A CN 102183315A
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Abstract
The invention discloses a circuit and a method for detecting identity (ID) and temperature of a battery by using a common detection pin. The detection circuit is used for detecting the ID and the temperature of the battery when a mobile terminal is charged; the battery is provided with the common detection pin; a thermistor in the battery is connected with a base band chip of the mobile terminal through the common detection pin; the common detection pin is connected with a power management chip of the mobile terminal through a resistor; the base band chip detects voltage and temperature of the thermistor through the common detection pin; and when the voltage of the thermistor is in a predetermined voltage range and the temperature of the thermistor is in a predetermined temperature range, the mobile terminal is informed to have the battery charged. By the circuit for detecting the ID and the temperature of the battery by using the common detection pin provided by the embodiment of the invention, the resource of the base band chip is saved; and in normal temperature, the current generated by the circuit is 0.04mA, so that the current generated by the detection circuit is reduced greatly.
Description
Technical field
The present invention relates to battery ID and battery temperature detection technique field, particularly a kind of shared detection pin detects the testing circuit and the detection method thereof of battery ID and battery temperature.
Background technology
Mobile phone generally need be to the ID(identity of battery when charging, the identify label number) detect, detect battery and whether be installed in the mobile phone, and judge whether battery is legal, if conforming to rule, the battery of packing into do not stop mobile phone to battery-operated.In addition, mobile phone also needs the temperature of battery is detected when charging, avoids making that because of cell-phone charging the temperature of battery is too high.
At present, in the design of mobile phone, above-mentioned two detections all separately detect, and the scheme that has is the PTC(Positive Temperature Coefficient of temperature detection, positive temperature coefficient) be placed on inside battery and do not draw the detection pin separately, the cost of this scheme is than higher; The scheme that has is to use NTC(Negative Temperature Coefficient at inside battery, negative temperature coefficient) temperature detection, and on battery, draw a pin separately, in mobile phone circuit, this pin is linked into the ADC(Analog-to-Digital Converter of baseband chip, A/D converter) port detects, this method is simple and cost is low, but this mode needs the ADC that takies base band to detect pin more, and the current ratio that this scheme produces is bigger, under the normal temperature, when the resistance of thermistor was 10 kilo-ohms, its electric current was 0.16mA, 8% of electric current when being equivalent to cell phone standby about 2.0mA has consumed more electric current.
Thereby prior art is still waiting to improve and improve.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of shared detection pin to detect the testing circuit and the method for battery ID and battery temperature, can detect battery ID and battery temperature by a common detection pin of battery, thereby save the resource of baseband chip of mobile terminal.
In order to achieve the above object, the present invention has taked following technical scheme:
A kind of shared detection pin detects the testing circuit of battery ID and battery temperature, be used for when portable terminal charges, detecting the ID and the temperature of battery, wherein, described battery has a common detection pin, thermistor in the described battery is connected with the baseband chip of portable terminal by this common detection pin, and this common detection pin also is connected with the power management chip of portable terminal by resistance; Described baseband chip detects the voltage and the temperature of described thermistor by this common detection pin, and the voltage of thermistor in predetermined voltage range, the temperature of thermistor is in predetermined temperature range the time, the notice portable terminal charges the battery.
Described shared detection pin detects the testing circuit of battery ID and battery temperature, and wherein, described predetermined temperature is 0-45 ℃.
Described shared detection pin detects the testing circuit of battery ID and battery temperature, and wherein, described predetermined voltage is 0.2-1.03V.
Described shared detection pin detects the testing circuit of battery ID and battery temperature, and wherein, the resistance of described resistance is 56K Ω.
A kind of method by shared detection pin detection battery ID and battery temperature wherein, comprising:
Charger is inserted in the portable terminal;
Detect the voltage and the temperature of the thermistor in the battery by the common detection pin of baseband chip by battery, and the voltage of thermistor in predetermined voltage range, the temperature of thermistor is in predetermined temperature range the time, the notice portable terminal charges the battery.
Described method by shared detection pin detection battery ID and battery temperature, wherein, described predetermined temperature is 0-45 ℃.
Described method by shared detection pin detection battery ID and battery temperature, wherein, described predetermined voltage is 0.2-1.03V.
Shared detection pin provided by the invention detects the testing circuit and the method for battery ID and battery temperature, the common detection pin of battery is connected with baseband chip, and this common detection pin is connected with power management chip by resistance, when portable terminal charges, baseband chip detects the voltage and the temperature of described thermistor by this common detection pin, and at the voltage of thermistor in predetermined voltage range, the temperature of thermistor is in predetermined temperature range the time, the notice portable terminal charges the battery, otherwise can not charge, save the resource of baseband chip of mobile terminal, and reduced the electric current that testing circuit produces.
Description of drawings
Fig. 1 detects the circuit theory diagrams of battery ID and battery temperature for prior art.
The shared detection pin that Fig. 2 provides for the embodiment of the invention detects the circuit theory diagrams of battery ID and battery temperature.
Embodiment
The invention provides testing circuit and method that a kind of shared detection pin detects battery ID and battery temperature, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below with reference to accompanying drawing and give an actual example that the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, it realizes the circuit theory diagrams that battery ID detects and battery temperature detects for the prior art mobile phone.Wherein, the resistance of inside battery resistance R is 10 kilo-ohms, and thermistor Rt resistance of (25 degrees centigrade) when normal temperature also is 10 kilo-ohms.Resistance R 1 in the mobile phone detection circuit, R2 is 24 kilo-ohms resistance, and power management chip output aanalogvoltage AVDD is generally 2.8V, thereby baseband chip should be the dividing potential drop of power management chip on resistance R by the detected magnitude of voltage of its ADC1 port,
When the voltage that detects when the ADC1 of baseband chip port is 0.82V, thinks and battery is housed and what pack into is legal battery in the mobile phone.Because of the resistance of thermistor can change along with the variation of battery temperature, thermistor is 2.06 kilo-ohms in the time of 65 ℃ generally, being 32.5 kilo-ohms in the time of 0 ℃, is 10 kilo-ohms when normal temperature, thereby the detected magnitude of voltage of ADC2 port by baseband chip also is 0.82V at normal temperatures.And, in the design of mobile phone, only to battery charge the time, the ADC1 port and the ADC2 port that just can start baseband chip detect.And generally set battery temperature in the time of 0 to 45 degree centigrade, mobile phone can charge normal, otherwise can not charge, so this mode determines whether to cell-phone charging by the magnitude of voltage of judging ADC1 port and ADC2 port.This method is simple and cost is low, but this mode needs the ADC that takies mobile phone to detect pin more, and the current ratio that this scheme produces is bigger, when the resistance of thermistor is 10 kilo-ohms, its electric current is 0.16mA, 8% of electric current when being equivalent to cell phone standby about 2.0mA, as seen this circuit has produced bigger electric current.
Shortcoming based on above-mentioned prior art, the embodiment of the invention provides a kind of shared detection pin to detect the testing circuit of battery ID and battery temperature, this testing circuit is used for detecting the ID and the temperature of battery when portable terminal charges, reach the purpose of the resource of saving baseband chip.
As shown in Figure 2, the battery BAT of portable terminal has a common detection pin BAT_ID/TEM, be provided with a thermistor Rt in the inside of battery BAT, this thermistor Rt is connected with the baseband chip of portable terminal by shared this common detection pin BAT_ID/TEM, and this common detection pin BAT_ID/TEM also is connected with the power management chip of portable terminal by resistance, thereby described baseband chip detects voltage and the temperature of the thermistor Rt among the battery BAT by this common detection pin BAT_ID/TEM, and at the voltage of thermistor Rt in predetermined voltage range, the temperature of thermistor Rt is in predetermined temperature range the time, the notice portable terminal is given battery BAT charging, otherwise, can not charge.
Please continue to consult Fig. 2, with the mobile phone is Application Example, battery BAT inside only needs a thermistor Rt who is used for temperature detection, and on battery, draw a common detection pin BAT_ID/TEM, this common detection is drawn with the ADC1 port of baseband chip and is connected, detect magnitude of voltage on this common detection pin BAT_ID/TEM as the value that detects battery ID by baseband chip, also as the value of temperature detection.Also only need resistance R 1 of design on the mainboard of mobile phone, the common detection pin BAT_ID/TEM of battery BAT is connected with power management chip by this resistance R 1, provides aanalogvoltage AVDD by power management chip.
In the specific implementation, the resistance of described resistance R 1 is 56 kilo-ohms, because the resistance of thermistor Rt when 0 degree centigrade and 45 degrees centigrade is respectively 32.5 kilo-ohms and 4.35 kilo-ohms, and the setting predetermined temperature is 0-45 ℃, thereby predetermined voltage is when being 0-45 degree centigrade, dividing potential drop on the thermistor Rt, when the detected voltage of baseband chip is in predetermined voltage range, both thought battery is housed in the mobile phone, battery is legal, and in the temperature range that allows charging, mobile phone can the bio-occlusion battery charge, otherwise can not charge.
In the present embodiment, the range computation of described predetermined voltage is as follows:
In the time of 0 ℃, the partial pressure value on the thermistor Rt is:
In the time of 45 ℃, the partial pressure value on the thermistor Rt is:
So, when the ADC1 port of setting baseband chip detects the magnitude of voltage of this scope of 0.2V-1.03V, just judge when legal battery and temperature permission are housed in the mobile phone, charge normal to battery, otherwise can not charge the battery.
The shared detection pin that the embodiment of the invention provides detects the testing circuit of battery ID and battery temperature, the resource of having saved baseband chip, and at normal temperatures, the electric current that this circuit produces is 0.04mA, has significantly reduced the electric current that testing circuit produces; The electronic component that adopted of this testing circuit is few simultaneously, has reduced the cost of product, has improved the competitive power of product on market.
The also corresponding method that provides a kind of by shared detection pin detection battery ID and battery temperature of the embodiment of the invention, it comprises: the first step, charger is inserted in the portable terminal; Second goes on foot, is detected by the common detection pin of battery by baseband chip the voltage and the temperature of the thermistor in the battery, and the voltage of thermistor in predetermined voltage range, the temperature of thermistor is in predetermined temperature range the time, the notice portable terminal charges the battery.When portable terminal was mobile phone, setting described predetermined temperature was 0-45 ℃, and predetermined voltage is 0.2-1.03V.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.
Claims (7)
1. a shared detection pin detects the testing circuit of battery ID and battery temperature, be used for when portable terminal charges, detecting the ID and the temperature of battery, it is characterized in that, described battery has a common detection pin, thermistor in the described battery is connected with the baseband chip of portable terminal by this common detection pin, and this common detection pin also is connected with the power management chip of portable terminal by resistance; Described baseband chip detects the voltage and the temperature of described thermistor by this common detection pin, and the voltage of thermistor in predetermined voltage range, the temperature of thermistor is in predetermined temperature range the time, the notice portable terminal charges the battery.
2. shared detection pin as claimed in claim 1 detects the testing circuit of battery ID and battery temperature, it is characterized in that described predetermined temperature is 0-45 ℃.
3. shared detection pin as claimed in claim 1 or 2 detects the testing circuit of battery ID and battery temperature, it is characterized in that described predetermined voltage is 0.2-1.03V.
4. shared detection pin as claimed in claim 1 detects the testing circuit of battery ID and battery temperature, it is characterized in that the resistance of described resistance is 56K Ω.
5. the method by shared detection pin detection battery ID and battery temperature is characterized in that, comprising:
Charger is inserted in the portable terminal;
Detect the voltage and the temperature of the thermistor in the battery by the common detection pin of baseband chip by battery, and the voltage of thermistor in predetermined voltage range, the temperature of thermistor is in predetermined temperature range the time, the notice portable terminal charges the battery.
6. the method by shared detection pin detection battery ID and battery temperature as claimed in claim 5 is characterized in that described predetermined temperature is 0-45 ℃.
7. as claim 5 or 6 described methods, it is characterized in that described predetermined voltage is 0.2-1.03V by shared detection pin detection battery ID and battery temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100477375A CN102183315A (en) | 2011-02-28 | 2011-02-28 | Circuit and method for detecting identity (ID) and temperature of battery by using common detection pin |
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| CN2011100477375A CN102183315A (en) | 2011-02-28 | 2011-02-28 | Circuit and method for detecting identity (ID) and temperature of battery by using common detection pin |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102685281A (en) * | 2012-03-28 | 2012-09-19 | 惠州Tcl移动通信有限公司 | Mobile terminal equipment |
| CN103185644A (en) * | 2011-12-29 | 2013-07-03 | 联芯科技有限公司 | Detection method and detection system of battery temperature |
| CN103197258A (en) * | 2013-04-09 | 2013-07-10 | 青岛海信移动通信技术股份有限公司 | Battery type detection method and mobile terminal |
| WO2015024454A1 (en) * | 2013-08-23 | 2015-02-26 | 中兴通讯股份有限公司 | Battery detection circuit and method for mobile terminal, and mobile terminal |
| CN104714184A (en) * | 2015-03-12 | 2015-06-17 | 惠州Tcl移动通信有限公司 | Device and method for detecting battery ID and battery temperature through singular pins |
| CN105676145A (en) * | 2016-04-01 | 2016-06-15 | 福建联迪商用设备有限公司 | Method and device for detecting temperature and ID of battery |
| CN107271917A (en) * | 2017-07-19 | 2017-10-20 | 上海鼎为电子科技（集团）有限公司 | Battery detection circuit and mobile terminal |
| CN108347037A (en) * | 2012-11-21 | 2018-07-31 | 夏雨 | Battery protecting apparatus |
| CN109473736A (en) * | 2017-09-08 | 2019-03-15 | 上海比亚迪有限公司 | Resistor detection method, charge/discharge control method, device and the electronic equipment of battery |
| CN111181204A (en) * | 2018-11-09 | 2020-05-19 | 凹凸电子（武汉）有限公司 | Battery protection system, battery protection method and battery pack |
| CN111337841A (en) * | 2018-11-30 | 2020-06-26 | 南昌华勤电子科技有限公司 | Mobile terminal and battery state detection system thereof |
| CN111432069A (en) * | 2020-03-12 | 2020-07-17 | Oppo广东移动通信有限公司 | Starting control method and device of terminal equipment and related equipment |
| CN112216885A (en) * | 2020-10-15 | 2021-01-12 | 上海畅联智融通讯科技有限公司 | Mobile terminal battery life cycle reading circuit |
| CN112531818A (en) * | 2020-11-20 | 2021-03-19 | 芜湖华沅微电子有限公司 | Ultra-compact four-string lithium battery protection chip and peripheral circuit |
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Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103185644A (en) * | 2011-12-29 | 2013-07-03 | 联芯科技有限公司 | Detection method and detection system of battery temperature |
| CN103185644B (en) * | 2011-12-29 | 2015-04-15 | 联芯科技有限公司 | Detection method and detection system of battery temperature |
| CN102685281A (en) * | 2012-03-28 | 2012-09-19 | 惠州Tcl移动通信有限公司 | Mobile terminal equipment |
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| CN108418188A (en) * | 2012-11-21 | 2018-08-17 | 夏雨 | Battery protecting method |
| CN108347037A (en) * | 2012-11-21 | 2018-07-31 | 夏雨 | Battery protecting apparatus |
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| CN105353317A (en) * | 2013-04-09 | 2016-02-24 | 青岛海信移动通信技术股份有限公司 | Battery type detection method and mobile terminal |
| CN105353317B (en) * | 2013-04-09 | 2018-09-04 | 青岛海信移动通信技术股份有限公司 | A kind of battery type detection method and mobile terminal |
| CN103197258A (en) * | 2013-04-09 | 2013-07-10 | 青岛海信移动通信技术股份有限公司 | Battery type detection method and mobile terminal |
| CN104422541A (en) * | 2013-08-23 | 2015-03-18 | 中兴通讯股份有限公司 | Battery detection circuit and method of mobile terminal and mobile terminal |
| WO2015024454A1 (en) * | 2013-08-23 | 2015-02-26 | 中兴通讯股份有限公司 | Battery detection circuit and method for mobile terminal, and mobile terminal |
| CN104422541B (en) * | 2013-08-23 | 2019-02-26 | 中兴通讯股份有限公司 | Battery detection circuit, method and the mobile terminal of mobile terminal |
| CN104714184A (en) * | 2015-03-12 | 2015-06-17 | 惠州Tcl移动通信有限公司 | Device and method for detecting battery ID and battery temperature through singular pins |
| CN104714184B (en) * | 2015-03-12 | 2017-11-10 | 惠州Tcl移动通信有限公司 | Battery ID and the detection means and method of battery temperature are detected by single pin |
| CN105676145A (en) * | 2016-04-01 | 2016-06-15 | 福建联迪商用设备有限公司 | Method and device for detecting temperature and ID of battery |
| CN107271917A (en) * | 2017-07-19 | 2017-10-20 | 上海鼎为电子科技（集团）有限公司 | Battery detection circuit and mobile terminal |
| CN109473736A (en) * | 2017-09-08 | 2019-03-15 | 上海比亚迪有限公司 | Resistor detection method, charge/discharge control method, device and the electronic equipment of battery |
| CN109473736B (en) * | 2017-09-08 | 2021-12-03 | 上海比亚迪有限公司 | Battery resistance detection method, charge and discharge control method and device and electronic equipment |
| CN111181204A (en) * | 2018-11-09 | 2020-05-19 | 凹凸电子（武汉）有限公司 | Battery protection system, battery protection method and battery pack |
| CN111181204B (en) * | 2018-11-09 | 2021-12-10 | 凹凸电子（武汉）有限公司 | Battery protection system, battery protection method and battery pack |
| US11309704B2 (en) | 2018-11-09 | 2022-04-19 | O2Micro Inc. | Battery protection systems |
| CN111337841A (en) * | 2018-11-30 | 2020-06-26 | 南昌华勤电子科技有限公司 | Mobile terminal and battery state detection system thereof |
| CN111432069A (en) * | 2020-03-12 | 2020-07-17 | Oppo广东移动通信有限公司 | Starting control method and device of terminal equipment and related equipment |
| CN112216885A (en) * | 2020-10-15 | 2021-01-12 | 上海畅联智融通讯科技有限公司 | Mobile terminal battery life cycle reading circuit |
| CN112216885B (en) * | 2020-10-15 | 2021-11-05 | 上海畅联智融通讯科技有限公司 | Mobile terminal battery life cycle reading circuit |
| CN112531818A (en) * | 2020-11-20 | 2021-03-19 | 芜湖华沅微电子有限公司 | Ultra-compact four-string lithium battery protection chip and peripheral circuit |
| CN112531818B (en) * | 2020-11-20 | 2023-06-16 | 芜湖华沅微电子有限公司 | Ultra-compact four-string lithium battery protection chip and peripheral circuit |
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Application publication date: 20110914 |