CN101608955B - Battery temperature sensing system and method thereof - Google Patents
Battery temperature sensing system and method thereof Download PDFInfo
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- CN101608955B CN101608955B CN2008103022539A CN200810302253A CN101608955B CN 101608955 B CN101608955 B CN 101608955B CN 2008103022539 A CN2008103022539 A CN 2008103022539A CN 200810302253 A CN200810302253 A CN 200810302253A CN 101608955 B CN101608955 B CN 101608955B
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Abstract
The invention relates to a battery temperature sensing system which is applied to an integrated circuit chip of a handheld electronic device and is used for setting ranges of standard current value and temperature critical value of a battery, obtaining a voltage value output by a current-limiting resistor, computing a current value output by the integrated circuit chip, computing a correction parameter of correction voltage according to the set standard current and the current value output by the integrated circuit chip, computing the correction voltage value of a thermistor of the battery according to the correction parameter and the voltage value output by the current-limiting resistor, reading the battery temperature from a temperature mapping table of a storage unit according to the correction voltage value, judging whether the batter temperature exceeds the set temperature critical value range or not, and warning whether the battery can be charged or not at the temperature. The invention also provides a battery temperature sensing method. The invention can accurately sense the battery temperature of the handheld electronic device.
Description
Technical field
The present invention relates to the battery of portable electric device, particularly about a kind of battery temperature sensing system and method.
Background technology
In today that information industry is advanced by leaps and bounds, portable electric device (for example mobile phone) has become the widely used communication tool of people's daily life.Directly have influence on the length of cell phone standby and air time as the quality of the battery of auxiliary products, if security performance has problem also can directly relate to the person and property safety.Therefore, the cellular phone power supplies management also becomes more and more important, and (Integrated Circuit, IC) chip has been used in the battery of mobile phone management special IC of some cellular phone power supplies management systems.But, present mobile phone battery temperature undesired (generally more than 50 ℃ or below-10 ℃, wherein " ℃ " for degree centigrade temperature unit of representing) situation under, then can not charge to battery of mobile phone.
When the battery of portable electric device charged, the microprocessor in the portable electric device at first detected cell voltage and battery temperature, judged that then whether voltage completely press, if voltage is completely pressed complete charge then.If voltage less than, judge further whether battery temperature normal, if battery temperature is normal, then battery is charged normal, if battery temperature is undesired, then finish battery charge.Normally, the battery temperature of portable electric device is sent an electric current by the IC chip and is exported the temperature that the resulting voltage of thermistor on the battery decides battery to.
Yet the electric current of being sent can't maintain certain value usually, thereby the voltage that can't obtain thermistor accurately causes obtaining accurately the temperature of battery.Therefore, when under the environment of very high temperature or the utmost point low temperature battery of portable electric device being charged, need do monitoring accurately to battery temperature, current anomaly is caused danger in the time of just avoiding because of battery charge.
Summary of the invention
In view of above content, be necessary to provide a kind of battery temperature sensing system, proofread and correct the voltage of battery thermistor by the mode of offset current, thereby can detect the battery temperature of portable electric device exactly.
In addition, also be necessary to provide a kind of battery temperature sensing method, proofread and correct the voltage of battery thermistor, thereby can detect the battery temperature of portable electric device exactly by the mode of offset current.
A kind of battery temperature sensing system solidifies in the integrated circuit (IC) chip of portable electric device, is used to detect the battery temperature of portable electric device.This system comprises: parameter setting module is used for the temperature threshold value scope of established standards current value I 0 and battery; Voltage measures module, is used for obtaining the magnitude of voltage U1 of the current-limiting resistance of portable electric device, and calculates the electric current I of integrated circuit (IC) chip output according to current-limiting resistance value R1 and magnitude of voltage U1; The voltage correction module is used for according to the normalized current I that sets
0Calculate a correction parameter α who is used for correction voltage with the electric current I of output, and utilize correction parameter α to calculate the correction voltage value U2 of the thermistor R2 of battery; The temperature read module is used for reading battery temperature according to the correction voltage value U2 that calculates from the temperature table of comparisons that is stored in storage unit, and this battery temperature is presented on the display screen of portable electric device; The temperature alarm module is used to judge whether battery temperature exceeds the temperature threshold value scope of setting, and whether the caution battery can charge under this temperature.
A kind of battery temperature sensing method is used to detect the battery temperature of portable electric device, and this method comprises the steps: the established standards current value I
0Temperature threshold value scope with battery; Obtain the magnitude of voltage U1 of the current-limiting resistance in the portable electric device, and calculate the electric current I that the integrated circuit (IC) chip in the portable electric device is exported according to current-limiting resistance value R1 and magnitude of voltage U1; According to the normalized current I that sets
0Calculate a correction parameter α who is used for correction voltage with the electric current I of output; Utilize the correction voltage value U2 of this correction parameter α according to the thermistor R2 of computing formula counting cell; From the temperature table of comparisons that is stored in storage unit, search the temperature of battery correspondence according to the correction voltage value U2 that calculates, and read the temperature of battery; Whether the temperature of judging battery surpasses the temperature threshold value scope of setting; If the temperature of battery exceeds the temperature threshold value scope of setting, then warn battery and under this temperature, can not charge; If the temperature of battery does not exceed the temperature threshold value scope of setting, then show this temperature and point out battery under this temperature, can charge.
Description of drawings
Fig. 1 is the applied environment figure of battery temperature sensing system preferred embodiment of the present invention.
Fig. 2 is the functional block diagram of the battery temperature sensing system of portable electric device among Fig. 1.
Fig. 3 is the synoptic diagram of the temperature table of comparisons stored in the storage unit among Fig. 1.
Fig. 4 is the process flow diagram of battery temperature sensing method of the present invention preferred embodiment.
Embodiment
Consulting shown in Figure 1ly, is the applied environment figure of battery temperature sensing system preferred embodiment of the present invention.Described battery temperature sensing system 110 solidifies integrated circuit in portable electric device 1, and (Integrated Circuit IC) in the chip 11, is used to detect the temperature of the battery 2 of portable electric device 1.Portable electric device 1 can be mobile phone or other electronic communication equipments.In the present embodiment, this portable electric device 1 is a mobile phone, and it is connected with battery 2.
Described portable electric device 1 comprises IC chip 11, storage unit 12, display screen 13 and current-limiting resistance R1.The voltage U that an electric current I obtains to the thermistor R2 of battery 2 of being used to this IC chip 11 to export decides the temperature of battery 2.Storage unit 12 is used for the storing temperature table of comparisons, and this temperature table of comparisons records different current values and the pairing temperature value of magnitude of voltage.Display screen 13 is used to show the temperature of battery 2, and shows the information whether battery 2 can charge under this temperature.This current-limiting resistance R1 is used to calculate the current value I of IC chip 11 outputs, and in the present embodiment, the resistance value of this current-limiting resistance R1 is 100K Ω.
Described battery temperature sensing system 110 is used for the established standards current value I
0With the temperature threshold value scope of battery, obtain the magnitude of voltage U1 of current-limiting resistance R1, calculate the current value I of IC chip 11 outputs, according to the normalized current I that sets
0Calculate the correction parameter α of a correction voltage, utilize this correction parameter α to calculate the correction voltage value U2 of battery 2, from the described temperature table of comparisons, read the temperature of battery 2 according to this correction voltage value U2, and warn battery 2 and under this temperature, whether can charge.
Consulting shown in Figure 2ly, is the functional block diagram of the battery temperature sensing system in the portable electric device 1 110 among Fig. 1.This battery temperature sensing system 110 comprises: parameter setting module 1100, voltage measure module 1101, voltage correction module 1102, temperature read module 1103 and temperature alarm module 1104.
Parameter setting module 1100 is used for the established standards current value I
0And the temperature threshold value of battery 2, for example: the established standards current value I
0Be 10uA, the temperature threshold value scope is between-10 ℃ to 50 ℃, wherein " ℃ " for using degree centigrade temperature unit of representing.
Voltage measures the magnitude of voltage U1 that module 1101 is used to obtain current-limiting resistance R1, and calculates the electric current I that IC chip 11 is exported according to current-limiting resistance R1 and magnitude of voltage U1.Wherein, the computing formula of calculating electric current I is: I=U1/R1=U1/100K Ω.
Voltage correction module 1102 is used for according to the normalized current I that sets
0Calculate a correction parameter α who is used for correction voltage, and utilize this correction parameter α to calculate the correction voltage value U2 of the thermistor R2 of battery 2.Wherein, the computing formula of the parameter alpha of calculation correction voltage is: α=I
0/ I; The computing formula of calculation correction magnitude of voltage U2 is: U2=U1 * α.
Temperature read module 1103 is used for reading the temperature of battery 2 according to the correction voltage value U2 that calculates from the described temperature table of comparisons, and this temperature value is presented on the display screen 13.
Temperature alarm module 1104 is used to judge whether the temperature of battery 2 exceeds the temperature threshold value scope of setting, and whether caution battery 2 can charge under this temperature.In the present embodiment, when the temperature of battery 2 is higher than 50 ℃ or when being lower than-10 ℃, temperature alarm module 1104 caution batteries 2 can not charge under this temperature.When the temperature of battery 2 between-10 ℃ between 50 ℃ the time, temperature alarm module 1104 shows these temperature values, and prompting battery 2 can charge under this temperature.
Consulting shown in Figure 3ly, is the synoptic diagram of the temperature table of comparisons of storage unit 12 storage among Fig. 1.This temperature table of comparisons is used to write down the temperature value of different current value I and the pairing battery 2 of magnitude of voltage U, from this temperature table of comparisons, search the temperature of battery 2 according to correction voltage value U2 for described battery temperature sensing system 110, thereby read out the temperature of battery 2.In the present embodiment, if the standard current value I that parameter setting module 1100 is set
0Be 10uA, voltage measures the output voltage values U1=1.2V that module 1101 measures current-limiting resistance R1, electric current I=1.2V/100K Ω=the 1.2uA of IC chip 11 outputs that calculate for 100K Ω according to the resistance value of current-limiting resistance R1, the correction parameter α=I of voltage correction module 1102 calculation correction voltages
0/ I=10uA/12uA=0.833.Then, voltage correction module 1102 calculates the correction voltage value U2=U1 * α=1.2V * 0.833=166.6mV of battery 2 according to this correction parameter α.Temperature read module 1103 is 10 ℃ according to correction voltage value U2=166.6mV finds battery 2 correspondences from the temperature table of comparisons that is stored in storage unit 12 temperature.
Consulting shown in Figure 4ly, is the process flow diagram of battery temperature sensing method of the present invention preferred embodiment.Parameter setting module 1100 established standards current value I
0And the temperature threshold value scope of battery 2, for example established standards current value I
0Be 10uA, the temperature threshold value scope is made as between-10 ℃ to 50 ℃ (step S40).Voltage measures the magnitude of voltage U1 (step S41) that module 1101 is obtained current-limiting resistance R1.Voltage measures module 1101 and calculates the electric current I that IC chip 11 is exported according to current-limiting resistance R1 and magnitude of voltage U1 according to computing formula I=U1/R1, and wherein R1 is 100K Ω (step S42).Voltage correction module 1102 is according to the normalized current I that sets
0According to computing formula α=I
0/ I calculates a correction parameter α (step S43) who is used for correction voltage.Voltage correction module 1102 utilizes this parameter alpha to calculate the correction voltage value U2 (step S44) of the thermistor R2 of battery 2 according to computing formula U2=U1 * α.Temperature read module 1103 finds the temperature of battery 2 correspondences according to the correction voltage value U2 that calculates from the temperature table of comparisons that is stored in storage unit 12, and reads out the temperature (step S45) of this battery 2.Temperature alarm module 1104 judges whether the temperature of battery 2 surpasses the temperature threshold value scope of setting (step S46).If the temperature of battery 2 exceeds the temperature threshold value scope of setting, promptly be higher than 50 ℃ or when being lower than-10 ℃ when the temperature of battery 2, temperature alarm module 1104 caution batteries 2 under this temperature, can not charge (step S47).If the temperature of battery 2 does not exceed the temperature threshold value scope of setting, promptly when the temperature of battery 2 between-10 ℃ between 50 ℃ the time, temperature alarm module 1104 shows these temperature values, and prompting battery 2 can charge under this temperature (step S48).
Described battery temperature sensing system and method are proofreaied and correct the voltage of battery thermistor by the mode of offset current, thereby can detect the battery temperature of portable electric device exactly.Therefore, when under the environment of very high temperature or utmost point low temperature, the battery of portable electric device being charged, can do monitoring exactly, thereby current anomaly is caused danger when avoiding because of battery charge to battery temperature.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to above preferred embodiment, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to the spirit and scope that replacement should not break away from technical solution of the present invention technical scheme of the present invention.
Claims (9)
1. a battery temperature sensing system solidifies in the integrated circuit (IC) chip of portable electric device, is used to detect the battery temperature of portable electric device, it is characterized in that, this system comprises:
Parameter setting module is used for the established standards current value I
0Temperature threshold value scope with battery;
Voltage measures module, is used for obtaining the magnitude of voltage U1 of the current-limiting resistance of portable electric device, and calculates the electric current I of integrated circuit (IC) chip output according to current-limiting resistance value R1 and magnitude of voltage U1;
The voltage correction module is used for according to the normalized current I that sets
0Calculate a correction parameter α who is used for correction voltage with the electric current I of output, and utilize correction parameter α to calculate the correction voltage value U2 of the thermistor R2 of battery;
The temperature read module is used for reading battery temperature according to the correction voltage value U2 that calculates from the temperature table of comparisons that is stored in storage unit, and this battery temperature is presented on the display screen of portable electric device;
The temperature alarm module is used to judge whether battery temperature exceeds the temperature threshold value scope of setting, and whether the caution battery can charge under this temperature.
2. battery temperature sensing system as claimed in claim 1 is characterized in that, described integrated circuit (IC) chip is used for the voltage that output current I obtains to the thermistor R2 of battery and decides battery temperature.
3. battery temperature sensing system as claimed in claim 1 is characterized in that, the described temperature table of comparisons records different current values and the pairing temperature value of magnitude of voltage.
4. battery temperature sensing system as claimed in claim 1, it is characterized in that, described temperature threshold value scope is between-10 ℃ to 50 ℃, when battery temperature is higher than 50 ℃ or when being lower than-10 ℃, described temperature alarm module caution battery can not charge under this temperature, when battery temperature between-10 ℃ to 50 ℃, described temperature alarm module shows this temperature value, and point out battery under this temperature, can charge, wherein " ℃ " for using degree centigrade temperature unit of representing.
5. battery temperature sensing system as claimed in claim 1 is characterized in that described portable electric device is a mobile phone, and it is connected with battery.
6. battery temperature sensing method is used to detect the battery temperature of portable electric device, it is characterized in that the method comprising the steps of:
The established standards current value I
0Temperature threshold value scope with battery;
Obtain the magnitude of voltage U1 of the current-limiting resistance in the portable electric device, and calculate the electric current I that the integrated circuit (IC) chip in the portable electric device is exported according to current-limiting resistance value R1 and magnitude of voltage U1;
According to the normalized current I that sets
0Calculate a correction parameter α who is used for correction voltage with the electric current I of output;
Utilize the correction voltage value U2 of this correction parameter α according to the thermistor R2 of computing formula counting cell;
From the temperature table of comparisons that is stored in storage unit, search the temperature of battery correspondence according to the correction voltage value U2 that calculates, and read the temperature of battery;
Whether the temperature of judging battery surpasses the temperature threshold value scope of setting;
If the temperature of battery exceeds the temperature threshold value scope of setting, then warn battery and under this temperature, can not charge;
If the temperature of battery does not exceed the temperature threshold value scope of setting, then show this temperature and point out battery under this temperature, can charge.
7. battery temperature sensing method as claimed in claim 6 is characterized in that, the computing formula of described current value I is I=U1/R1, and the computing formula of described correction parameter α is α=I
0/ I, the computing formula of described correction voltage value U2 is U2=U1 * α.
8. battery temperature sensing method as claimed in claim 6 is characterized in that, the described temperature table of comparisons records different current values and the pairing temperature value of magnitude of voltage.
9. battery temperature sensing method as claimed in claim 6, it is characterized in that, described temperature threshold value scope is between-10 ℃ to 50 ℃, when the temperature of battery is higher than 50 ℃ or when being lower than-10 ℃, the caution battery can not charge under this temperature, when the temperature of battery between-10 ℃ between 50 ℃ the time, show this temperature value and point out battery under this temperature, can charge, wherein " ℃ " for degree centigrade temperature unit of representing.
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| CN2008103022539A CN101608955B (en) | 2008-06-20 | 2008-06-20 | Battery temperature sensing system and method thereof |
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| CN2008103022539A CN101608955B (en) | 2008-06-20 | 2008-06-20 | Battery temperature sensing system and method thereof |
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| CN101608955A CN101608955A (en) | 2009-12-23 |
| CN101608955B true CN101608955B (en) | 2011-12-07 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102082868A (en) * | 2010-12-15 | 2011-06-01 | 上海华勤通讯技术有限公司 | Mobile phone abnormal temperature charging control alarm system |
| CN106549438A (en) * | 2016-10-31 | 2017-03-29 | 北京小米移动软件有限公司 | A kind of battery temperature measure and control device, method and mobile terminal |
| CN110556592A (en) * | 2018-05-30 | 2019-12-10 | 苏州宝时得电动工具有限公司 | battery pack temperature detection method and device and electric tool |
| CN113295291A (en) * | 2020-02-21 | 2021-08-24 | Oppo广东移动通信有限公司 | Temperature detection method and device, electronic equipment and computer readable storage medium |
| CN111835070B (en) * | 2020-07-27 | 2022-06-03 | 歌尔科技有限公司 | Wearable device charging control method and wearable device |
| CN116937006B (en) * | 2023-09-14 | 2023-12-26 | 深圳市首航新能源股份有限公司 | Temperature control method and energy storage system |
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| US5714868A (en) * | 1995-05-29 | 1998-02-03 | Nec Corporation | Battery pack and charger arrangement which intermittently monitors battery temperature during recharging and a method thereof |
| CN1230304A (en) * | 1996-09-12 | 1999-09-29 | 艾利森公司 | Appts. and method of monitoring battery temperature during charging |
| CN1314020A (en) * | 1998-08-25 | 2001-09-19 | 艾利森电话股份有限公司 | Method and an arrangement relating to temperature sensing in electric circuitry |
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Patent Citations (3)
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|---|---|---|---|---|
| US5714868A (en) * | 1995-05-29 | 1998-02-03 | Nec Corporation | Battery pack and charger arrangement which intermittently monitors battery temperature during recharging and a method thereof |
| CN1230304A (en) * | 1996-09-12 | 1999-09-29 | 艾利森公司 | Appts. and method of monitoring battery temperature during charging |
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| JP特开平10-10214A 1998.01.16 |
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