CN101588060A - Temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit - Google Patents
Temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit Download PDFInfo
- Publication number
- CN101588060A CN101588060A CNA2009101522188A CN200910152218A CN101588060A CN 101588060 A CN101588060 A CN 101588060A CN A2009101522188 A CNA2009101522188 A CN A2009101522188A CN 200910152218 A CN200910152218 A CN 200910152218A CN 101588060 A CN101588060 A CN 101588060A
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- control switch
- lithium battery
- temperature
- protection circuit
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Abstract
The invention relates to a temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit. The protection circuit is connected between a lithium battery protection circuit and a lithium battery, and is serially connected with a thermal resistor and an ordinary resistor between the battery anode and the battery cathode; when the temperature of the lithium battery is overhigh, the resistance value of the thermal resistor becomes small so that the first electronic control switch is switched off; the first electronic control switch controls the switching off of the second electronic control switch; the second electronic control switch switches off the charging circuit of battery cathode to stopping charging the battery so as to protect the battery. The invention not only can reuse the battery to avoid waste but also has the advantage that the temperature protection value can be adjusted.
Description
Technical field
The present invention relates to a kind of temperature protection circuit and adopt this circuit to realize preventing the method that battery temperature is too high.
Background technology
At present, industry lithium battery PACK hardware temperatures is protected most of serviceability temperature fuses, and its major function is the limiting value that surpasses Thermal Cutoffs when the battery battery core temperature, and Thermal Cutoffs just blows, battery can not discharge and recharge, the too high explosion hazard that occurs of protection battery battery core temperature; But being Thermal Cutoffs, its shortcoming can not recover after blowing.Fig. 2 is the employed temperature protection circuit of present industry; F1 is a Thermal Cutoffs, and its major function is the limiting value that surpasses Thermal Cutoffs when the battery battery core temperature, and Thermal Cutoffs just blows; but Thermal Cutoffs blows the back and just can't recover, and battery PACK can't use.
Summary of the invention
The technical problem that the present invention solves is: existing lithium battery adopts thermal fuse as high temperature protection; after the fusing; the problem that battery can't use; the invention provides a kind of temperature protection circuit and adopt the method that battery temperature is too high that prevents that this circuit realizes; protective circuit is connected between lithium battery protection circuit and the lithium battery; it is connected in series with thermistor and conventional, electric-resistance between positive source and power cathode; when the lithium battery temperature is too high; the thermistor resistance diminishes; the electronic control switch of winning is disconnected; first electronic control switch is controlled second electronic control switch and is disconnected; second electronic control switch turn-offs the battery cathode charge circuit; stop to charge the battery, with the protection battery.
Technical scheme of the present invention is: a kind of temperature protection circuit; temperature protection circuit is connected between rechargeable battery and the lithium battery protection circuit; protective circuit comprises conventional, electric-resistance R1 and the thermistor RT1 that is connected in series; the thermistor RT1 other end is connected positive source; resistance R 1 other end is connected power cathode; the common port of resistance R 1 and thermistor RT1 is connected with the control end of first electronic control switch; first electronic control switch is connected between the control end of the positive source and second electronic control switch, and second electronic control switch is connected in series on the charge circuit.
A kind of foregoing circuit that adopts realizes preventing the method that the lithium battery temperature is too high, this method is for being connected with temperature protection circuit between lithium battery protection circuit and lithium battery, be provided with the thermistor RT1 and the conventional, electric-resistance R1 that are connected in series between positive source and the power cathode in the temperature protection circuit, thermistor RT1 induction lithium battery temperature, when the lithium battery temperature is too high, thermistor RT1 resistance reduces, first electronic control switch is closed, first electronic control switch is closed second electronic control switch, second electronic control switch disconnects charge circuit, stops lithium battery being charged; When temperature reduced, thermistor RT1 resistance increased, and makes the first electronic control switch conducting, and first electronic control switch makes the second electronic control switch conducting, and second electronic control switch is communicated with charge circuit, recovered lithium battery is charged.
The technical scheme that technical solution problem of the present invention adopts further comprises:
Described first electronic control switch and second electronic control switch all adopt field effect transistor; the common port of resistance R 1 and thermistor RT1 is connected on the grid of field effect transistor Q1 by current-limiting resistance R2; the source electrode of field effect transistor Q1 is connected on the positive source; the drain electrode of field effect transistor Q1 is connected on the grid of field effect transistor Q2 by current-limiting resistance R4; the source electrode of field effect transistor Q2 is connected with lithium battery protection circuit, and the drain electrode of field effect transistor Q2 is connected with the lithium battery respective electrode.
Described second electronic control switch is connected on the charging negative loop, and second electronic control switch, one end is connected with the lithium battery protection circuit cathode output end, and the other end is connected with cathode of lithium battery.
Described first electronic control switch makes second electronic control switch adopt field effect transistor.
The conducting and the disconnection of described second electronic control switch control charge power supply negative loop.
The complete serviceability temperature sensor sensing of temperature protection circuit of the present invention battery battery core temperature; when the battery battery core temperature surpasses the temperature protection value; field effect transistor is closed; battery can not discharge and recharge; protected the too high explosion hazard that occurs of battery battery core temperature; when the battery battery core temperature is lower than the temperature protection value, the field effect transistor conducting, battery can discharge and recharge.It not only battery reuse, the advantage that avoids waste also has the advantage that can adjust the temperature protection value simultaneously.
Description of drawings
Fig. 1 is the circuit principle structure schematic diagram among the present invention.
Fig. 2 is the existing circuit principle structure schematic diagram of industry.
Embodiment
Below in conjunction with accompanying drawing, explain in more detail originally bright.
Please referring to accompanying drawing 1; temperature protection circuit of the present invention is connected between rechargeable battery and the lithium battery protection circuit; protective circuit comprises conventional, electric-resistance R1 and the thermistor RT1 that is connected in series; the thermistor RT1 other end is connected positive source (anodal passage promptly charges); resistance R 1 other end is connected power cathode (the negative pole passage promptly charges); the common port of resistance R 1 and thermistor RT1 is connected field effect transistor Q1 (in the present embodiment by current-limiting resistance R2; field effect transistor Q1 employing P-channel field-effect transistor (PEFT) pipe) on the grid; the source electrode of field effect transistor Q1 is connected on the positive source; the drain electrode of field effect transistor Q1 is connected field effect transistor Q2 (in the present embodiment by current-limiting resistance R4; field effect transistor Q2 adopts the two N type field effect transistor of 8 pins; during concrete enforcement; also can adopt common field effect transistor to replace) grid on; the source electrode of field effect transistor Q2 is connected with the lithium battery protection circuit cathode output end, and the drain electrode of field effect transistor Q2 is connected with cathode of lithium battery.Be connected with resistance R 3 between the drain electrode of field effect transistor Q1 and the power cathode.
Cardinal principle of the present invention, be that implementation method is: adopt thermistor RT1 to detect the battery battery core temperature as temperature sensor, under the battery normal condition, field effect transistor Q1 and field effect transistor Q2 are conductings, when the battery battery core temperature surpasses the temperature protection value, the resistance of thermistor RT1 diminishes, field effect transistor Q1 enters cut-off state by conducting, because field effect transistor Q1 ends, make the control utmost point (being grid) of field effect transistor Q2 drag down and become electronegative potential by resistance R 3, field effect transistor Q2 also ends, and battery can not discharge and recharge; Recover normally (when promptly being lower than the temperature protection value) when the battery battery core temperature, it is big that the resistance of temperature sensor RT1 becomes, and field effect transistor Q1 enters conducting state by ending, and the control utmost point of field effect transistor Q2 becomes high potential, and field effect transistor Q2 is conducting also, and battery can discharge and recharge.
First electronic control switch and second electronic control switch in the present embodiment all adopt field effect transistor, are because the field effect transistor temperature is floated less, working stability, and be more accurate to the temperature control ratio.
By the present invention, in the time of can making charging and discharging lithium battery, can recover voluntarily after entering temperature protection, can not cause waste.Simultaneously, can also adjust the temperature protection value by the size of adjusting resistance R 1.
Claims (6)
1; a kind of temperature protection circuit; temperature protection circuit is connected between rechargeable battery and the lithium battery protection circuit; it is characterized in that: described protective circuit comprises conventional, electric-resistance R1 and the thermistor RT1 that is connected in series; the thermistor RT1 other end is connected positive source; resistance R 1 other end is connected power cathode; the common port of resistance R 1 and thermistor RT1 is connected with the control end of first electronic control switch; first electronic control switch is connected between the control end of the positive source and second electronic control switch, and second electronic control switch is connected in series on the charge circuit.
2, temperature protection circuit according to claim 1; it is characterized in that: described first electronic control switch and second electronic control switch all adopt field effect transistor; the common port of resistance R 1 and thermistor RT1 is connected on the grid of field effect transistor Q1 by current-limiting resistance R2; the source electrode of field effect transistor Q1 is connected on the positive source; the drain electrode of field effect transistor Q1 is connected on the grid of field effect transistor Q2 by current-limiting resistance R4; the source electrode of field effect transistor Q2 is connected with lithium battery protection circuit, and the drain electrode of field effect transistor Q2 is connected with the lithium battery respective electrode.
3, temperature protection circuit according to claim 1 and 2; it is characterized in that: described second electronic control switch is connected on the charging negative loop; second electronic control switch, one end is connected with the lithium battery protection circuit cathode output end, and the other end is connected with cathode of lithium battery.
4, a kind ofly adopt circuit as claimed in claim 1 to realize preventing the method that the lithium battery temperature is too high, it is characterized in that: described method is for being connected with temperature protection circuit between lithium battery protection circuit and lithium battery, be provided with the thermistor RT1 and the conventional, electric-resistance R1 that are connected in series between positive source and the power cathode in the temperature protection circuit, thermistor RT1 induction lithium battery temperature, when the lithium battery temperature is too high, thermistor RT1 resistance reduces, first electronic control switch is closed, first electronic control switch is closed second electronic control switch, second electronic control switch disconnects charge circuit, stops lithium battery being charged; When temperature reduced, thermistor RT1 resistance increased, and makes the first electronic control switch conducting, and first electronic control switch makes the second electronic control switch conducting, and second electronic control switch is communicated with charge circuit, recovered lithium battery is charged.
5, circuit according to claim 4 is realized preventing the method that the lithium battery temperature is too high, it is characterized in that: described first electronic control switch makes second electronic control switch adopt field effect transistor.
6, realize preventing the method that the lithium battery temperature is too high according to claim 4 or 5 described circuit, it is characterized in that: the conducting and the disconnection of described second electronic control switch control charge power supply negative loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101522188A CN101588060A (en) | 2009-07-03 | 2009-07-03 | Temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101522188A CN101588060A (en) | 2009-07-03 | 2009-07-03 | Temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101588060A true CN101588060A (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101522188A Pending CN101588060A (en) | 2009-07-03 | 2009-07-03 | Temperature protection circuit and a method for preventing battery temperature from being overhigh by using the circuit |
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| CN (1) | CN101588060A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226878A (en) * | 2011-04-15 | 2011-10-26 | 仝兴孚 | Detection feedback circuit |
| CN102377171A (en) * | 2011-09-17 | 2012-03-14 | 新安县电业公司 | Overtemperature warning device for storage battery and overtemperature warning method therefor |
| CN105374179A (en) * | 2015-10-30 | 2016-03-02 | 苏州扬佛自动化设备有限公司 | Security and protection system |
| CN106486976A (en) * | 2016-11-23 | 2017-03-08 | 宇龙计算机通信科技(深圳)有限公司 | Battery protecting apparatus and battery protecting method |
| CN106602155A (en) * | 2016-12-19 | 2017-04-26 | 珠海格力电器股份有限公司 | Battery with a battery cell |
| CN106655371A (en) * | 2016-12-16 | 2017-05-10 | 欣旺达电子股份有限公司 | Battery high-current fast charging and discharging protection and monitoring circuit |
| CN106953381A (en) * | 2017-04-13 | 2017-07-14 | 上海与德科技有限公司 | Temperature protection circuit, method and the terminal device of charging inlet |
| CN107359596A (en) * | 2017-07-26 | 2017-11-17 | 惠州市德赛电池有限公司 | A kind of battery core protection circuit |
| CN108988293A (en) * | 2018-07-27 | 2018-12-11 | 南昌黑鲨科技有限公司 | Thermal-shutdown circuit and data line with it |
| CN108988292A (en) * | 2018-07-27 | 2018-12-11 | 南昌黑鲨科技有限公司 | Thermal-shutdown circuit and data line with it |
| CN109391010A (en) * | 2018-11-30 | 2019-02-26 | 深圳源创智能照明有限公司 | A kind of lithium battery high temperature automatic protection plate |
| CN110658404A (en) * | 2019-09-30 | 2020-01-07 | 中国联合网络通信集团有限公司 | Terminal testing device and method |
-
2009
- 2009-07-03 CN CNA2009101522188A patent/CN101588060A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226878A (en) * | 2011-04-15 | 2011-10-26 | 仝兴孚 | Detection feedback circuit |
| CN102377171A (en) * | 2011-09-17 | 2012-03-14 | 新安县电业公司 | Overtemperature warning device for storage battery and overtemperature warning method therefor |
| CN105374179A (en) * | 2015-10-30 | 2016-03-02 | 苏州扬佛自动化设备有限公司 | Security and protection system |
| CN106486976A (en) * | 2016-11-23 | 2017-03-08 | 宇龙计算机通信科技(深圳)有限公司 | Battery protecting apparatus and battery protecting method |
| CN106655371B (en) * | 2016-12-16 | 2023-09-26 | 欣旺达电子股份有限公司 | Protection and monitoring circuit for high-current quick charge and discharge of battery |
| CN106655371A (en) * | 2016-12-16 | 2017-05-10 | 欣旺达电子股份有限公司 | Battery high-current fast charging and discharging protection and monitoring circuit |
| CN106602155A (en) * | 2016-12-19 | 2017-04-26 | 珠海格力电器股份有限公司 | Battery with a battery cell |
| CN106602155B (en) * | 2016-12-19 | 2024-03-15 | 珠海格力电器股份有限公司 | Battery cell |
| CN106953381A (en) * | 2017-04-13 | 2017-07-14 | 上海与德科技有限公司 | Temperature protection circuit, method and the terminal device of charging inlet |
| CN107359596A (en) * | 2017-07-26 | 2017-11-17 | 惠州市德赛电池有限公司 | A kind of battery core protection circuit |
| CN108988292A (en) * | 2018-07-27 | 2018-12-11 | 南昌黑鲨科技有限公司 | Thermal-shutdown circuit and data line with it |
| CN108988293B (en) * | 2018-07-27 | 2020-06-02 | 南昌黑鲨科技有限公司 | Over-temperature protection circuit and data line with same |
| CN108988293A (en) * | 2018-07-27 | 2018-12-11 | 南昌黑鲨科技有限公司 | Thermal-shutdown circuit and data line with it |
| CN109391010A (en) * | 2018-11-30 | 2019-02-26 | 深圳源创智能照明有限公司 | A kind of lithium battery high temperature automatic protection plate |
| CN110658404A (en) * | 2019-09-30 | 2020-01-07 | 中国联合网络通信集团有限公司 | Terminal testing device and method |
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Application publication date: 20091125 |