CN103513668B - Temperature-control circuit, method and charging system - Google Patents
Temperature-control circuit, method and charging system Download PDFInfo
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- CN103513668B CN103513668B CN201210222226.7A CN201210222226A CN103513668B CN 103513668 B CN103513668 B CN 103513668B CN 201210222226 A CN201210222226 A CN 201210222226A CN 103513668 B CN103513668 B CN 103513668B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of temperature-control circuit, method and charging system.Temperature-control circuit comprises: judging unit, for receiving the temperature value of sensor, and is compared to thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively by temperature value and produces corresponding judged result; Computing unit, is coupled in judging unit, for calculating output power in real time according to judged result; And setting unit, be coupled in computing unit, for generation of corresponding to the voltage set value of output power and current setting value to power model.Adopt temperature-control circuit of the present invention, method and charging system can adjust the output power of charging system neatly, thus improve charge efficiency and avoid the generation of the overheat condition of charging system.
Description
Technical field
The present invention relates to a kind of control circuit, particularly relate to a kind of temperature-control circuit, method and charging system.
Background technology
Charging system (such as, charger of electric vehicle), the enclosure-type charging system especially not with fan, may be damaged when excess temperature.Therefore, when designing charging system, need to consider the balance between the charge efficiency of charging system and heating, heat radiation.The temperature-controlled process of traditional charging system is mainly divided into temperature switch control method and fragmentation threshold control method two kinds.Temperature switch control method utilizes the switch be coupled between power model and temperature sensor to control the temperature of charging system.When the temperature of temperature sensor instruction charging system reaches excess temperature threshold value, the power model being controlled charging system by cut-off switch stops output power, thus the temperature of charging system is slowed down or stops rising.Fragmentation threshold control method can arrange the multiple power level (such as, the first power level and the second power level) corresponding to multiple temperature threshold (such as, the first temperature threshold and the second temperature threshold).When charging system is started working, power model exports with rated power; When the temperature of temperature sensor instruction charging system reaches the first temperature threshold, power model such as, exports with the first power level (it is lower than rated power, is 50% of rated power); When the temperature of temperature sensor instruction charging system reaches the second temperature threshold, (it is lower than the first power level with the second power level for power model, such as 25% even 0 watt of rated power) export, thus the temperature of charging system is slowed down or stops rising.Wherein the second temperature threshold is greater than the first temperature threshold.Above-mentioned two kinds of temperature-controlled process adjust output power by the temperature of monitoring charging system.But said method can not adjust the output power of charging system neatly, thus cause charge efficiency not high.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of temperature-control circuit, method and charging system, to improve charge efficiency and to avoid charging system to occur excess temperature.
For solving the problems of the technologies described above, the invention provides a kind of temperature-control circuit, this temperature-control circuit comprises: judging unit, for receiving the temperature value of sensor, and temperature value is compared to thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively produce corresponding judged result; Computing unit, is coupled in judging unit, for calculating output power in real time according to judged result; And setting unit, be coupled in computing unit, for generation of corresponding to the voltage set value of output power and current setting value to power model.
Temperature-control circuit of the present invention, described voltage set value keeps constant.
Temperature-control circuit of the present invention, the variable quantity of the described temperature value in the described judging unit comparative unit time and predetermined temperature variation threshold value, if the variable quantity of described temperature value is greater than described predetermined temperature variation threshold value, described judged result is that described temperature-control circuit needs to carry out thermal equilibrium control, and described computing unit adjusts described output power in real time according to the variable quantity of described temperature value.
Temperature-control circuit of the present invention, if described temperature value is less than or equal to described thermal equilibrium threshold temperature, described judged result is that described temperature-control circuit does not need to carry out thermal equilibrium control, and described setting unit makes described power model export rated power; If described temperature value is greater than described thermal equilibrium threshold temperature, described judged result is that described temperature-control circuit needs to carry out thermal equilibrium control, and described computing unit adjusts described output power in real time according to the variable quantity of the described temperature value in the unit interval.
Temperature-control circuit of the present invention, during thermal equilibrium control, the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then described computing unit reduces described output power; If described temperature value reduces, then described computing unit increases described output power; And if described temperature value is constant, then described computing unit keeps described output power constant.
Temperature-control circuit of the present invention, during thermal equilibrium control, the variable quantity of the described output power in the described unit interval and the variable quantity linearly inverse relation of described temperature value.
Temperature-control circuit of the present invention, if described temperature value is more than or equal to described maximum operation (service) temperature, for there is excess temperature situation in described judged result, and described setting unit makes described power model stop output power, the more described temperature value of described judging unit and described recovery temperature, if described temperature value is less than or equal to described recovery temperature, described judged result is for recover normal, and described setting unit makes described power model export rated power.
Temperature-control circuit of the present invention, described maximum operation (service) temperature is greater than described thermal equilibrium threshold temperature and described thermal equilibrium threshold temperature is more than or equal to described recovery temperature.
Present invention also offers a kind of temperature-controlled process, this temperature-controlled process comprises the following steps: the temperature value receiving sensor; Temperature value is compared with thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively, produces corresponding judged result; Output power is calculated in real time according to judged result; And produce and correspond to the voltage set value of output power and current setting value to power model.
Temperature-controlled process of the present invention, described voltage set value keeps constant.
Temperature-controlled process of the present invention, described temperature-controlled process is further comprising the steps of: the variable quantity of the described temperature value in the comparative unit time and predetermined temperature variation threshold value; If the variable quantity of described temperature value is greater than described predetermined temperature variation threshold value, carries out thermal equilibrium control and adjust described output power in real time according to the variable quantity of described temperature value.
Temperature-controlled process of the present invention, described to calculate the step of output power in real time according to described judged result further comprising the steps of: if described temperature value is less than or equal to described thermal equilibrium threshold temperature, does not carry out thermal equilibrium control and make described power model export rated power; And if described temperature value is greater than described thermal equilibrium threshold temperature, carries out thermal equilibrium control and adjust described output power in real time according to the variable quantity of the described temperature value in the unit interval.
Temperature-controlled process of the present invention, carries out in the step of thermal equilibrium control described, and the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then reduces described output power; If described temperature value reduces, then increase described output power; And if described temperature value is constant, then keep described output power constant.
Temperature-controlled process of the present invention, described to calculate the step of output power in real time according to described judged result further comprising the steps of: if described temperature value is more than or equal to described maximum operation (service) temperature, make described power model stop output power; And if described temperature value is less than or equal to described recovery temperature, described power model is made to export rated power.
Present invention also offers a kind of charging system, this charging system comprises: sensor, transmits temperature value for temperature sensor; Control module, be coupled in sensor, for receiving temperature value, according to temperature value respectively with the comparing of thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature, real-time calculating output power, and produce the voltage set value and current setting value that correspond to output power; And power model, be coupled in control module, for receiver voltage settings and current setting value, and carry out charging operations according to voltage set value and current setting value.
Charging system of the present invention, described sensor comprises thermistor and digital temperature sensor.
Charging system of the present invention, described control module comprises: judging unit, for receiving described temperature value and being compared with described thermal equilibrium threshold temperature, described maximum operation (service) temperature and described recovery temperature respectively by described temperature value, produce corresponding judged result; Computing unit, is coupled in described judging unit, for calculating described output power in real time according to described judged result; And setting unit, be coupled in described computing unit, give described power model for generation of described voltage set value and described current setting value.
Charging system of the present invention, described charging operations provides electric power to realize to battery by described charging system.
Charging system of the present invention, described voltage set value keeps constant.
Charging system of the present invention, if described temperature value is less than or equal to described thermal equilibrium threshold temperature, described control module makes described power model export rated power; If described temperature value is greater than described thermal equilibrium threshold temperature, described control module adjusts described output power in real time according to the variable quantity of the described temperature value in the unit interval; If described temperature value is more than or equal to described maximum operation (service) temperature, described control module makes described power model stop output power; And if described temperature value is less than or equal to described recovery temperature, described control module makes described power model recover to export rated power.
Compared with prior art, temperature-control circuit of the present invention, method and charging system adjust the output power of charging system neatly according to temperature value, thus improve charge efficiency and avoid the generation of the overheat condition of charging system.
Accompanying drawing explanation
Below by way of to the description of some embodiments of the present invention in conjunction with its accompanying drawing, object of the present invention, specific structural features and advantage can be understood further, the assembly that wherein similar symbology is similar.
Figure 1 shows that the block scheme of charging system according to an embodiment of the invention;
Figure 2 shows that the block scheme of control module according to an embodiment of the invention;
Figure 3 shows that the change schematic diagram of output power in temperature controlled processes according to an embodiment of the invention and temperature;
Figure 4 shows that the change schematic diagram of output power in temperature controlled processes according to another embodiment of the invention and temperature;
Fig. 5 and the process flow diagram that Figure 6 shows that the temperature-controlled process undertaken by charging system according to an embodiment of the invention; And
Figure 7 shows that the process flow diagram of the temperature-controlled process undertaken by charging system according to another embodiment of the invention.
Embodiment
Detailed reference is provided below by embodiments of the invention.Although the present invention is undertaken setting forth and illustrating by these embodiments, it should be noted that the present invention is not merely confined to these embodiments.On the contrary, all substitutes, variant and the equivalent in invention spirit and invention scope that claims define is contained in the present invention.
In addition, in order to better the present invention is described, in embodiment hereafter, give numerous details.It will be understood by those skilled in the art that do not have these details, the present invention can implement equally.In other example, known method, formality, element and circuit are not described in detail, so that highlight purport of the present invention.
Figure 1 shows that the block scheme of charging system 100 according to an embodiment of the invention.This charging system 100 can be the charging system of any type, including, but not limited to the charger charged for electric vehicle and/or motor vehicle driven by mixed power etc.In the example of fig. 1, charging system 100 comprises sensor 102, control module 104 and power model 106.Sensor 102 for temperature sensor, the such as internal temperature of induction charging system 100, and the temperature value T sensed is transferred to control module 104.Sensor 102 can comprise thermistor (such as, negative tempperature coefficient thermistor NTC) and be coupled in the digital temperature sensor that temperature physical values is converted to temperature digital value by thermistor.The control module 104 being coupled in sensor 102 is for receiving temperature value T, and the temperature value T according to receiving calculates output power in real time, and produces the voltage set value Vset and current setting value Iset that correspond to output power.Be coupled in the power model 106 of control module 104 for receiver voltage settings Vset and current setting value Iset, and carry out charging operations according to voltage set value Vset and current setting value Iset.It will be understood by those skilled in the art that and electric power can be provided to realize this charging operations to battery (not shown) by the power model 106 of charging system 100.Figure 2 shows that the block scheme of control module 104 according to an embodiment of the invention.Composition graphs 1 is described by Fig. 2.As mentioned above, control module 104 is for receiving temperature value T, and the temperature value T according to receiving calculates output power in real time, and produces and correspond to the voltage set value Vset of output power and current setting value Iset to power model 106.In the figure 2 example, control module 104 comprises judging unit 202, computing unit 204 and setting unit 206.Judging unit 202 is for receiving the temperature value T of sensor 102 and producing corresponding judged result according to temperature value T.In the figure 2 example, temperature value T can compare with thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature by judging unit 202 respectively.Thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature can be stored in the storer (such as, EEPROM or Flash) interior (not shown in Fig. 2) of judging unit 202.Citing and and unrestricted, thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature can be respectively 75 DEG C, 100 DEG C and 65 DEG C.It will be understood by those skilled in the art that according to different application demands, thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature also can be set to other numerical value suitably, such as 75 DEG C, 85 DEG C and 75 DEG C.
Particularly, when receiving the temperature value T of sensor 102, judging unit 202 compares this temperature value T and thermal equilibrium threshold temperature (such as 75 DEG C).If temperature value T is less than or equal to thermal equilibrium threshold temperature, the judged result of judging unit 202 is: control module 104 does not need to carry out thermal equilibrium control.In the case, the output power that computing unit 204 calculates in real time is rated power.Such as, can according to the look-up table stored in computing unit 204, finding out corresponding output power when temperature value T is less than or equal to thermal equilibrium threshold temperature is rated power.Setting unit 206 produces the voltage set value Vset and current setting value Iset that correspond to rated power.Such as, according to the look-up table stored in setting unit 206, the voltage set value Vset corresponding with rated power and current setting value Iset can be found out, thus make power model 106 export rated power.If temperature value T is greater than thermal equilibrium threshold temperature, the judged result of judging unit 202 is: control module 104 needs to carry out thermal equilibrium control.In the case, the computing unit 204 being coupled in judging unit 202 calculates output power in real time according to judged result.Especially, suppose that the sampling time interval of sensor 102 is ti(and is, unit interval), the difference (that is, T (t+ti)-T (t)) put in sampling time between the temperature value T (t+ti) of t+ti and temperature value T (t) of upper sampling time point t is defined as the variable quantity △ T of the temperature value T in the unit interval.If variable quantity △ T is greater than 0, represent that temperature increases; If variable quantity △ T is less than 0, represent that temperature declines; If variable quantity △ T equals 0, represent temperature-resistant.Computing unit 204 can adjust output power in real time according to the variable quantity △ T of temperature value T.That is, when variable quantity △ T is approximately 0, when namely temperature value T keeps constant substantially, be considered as charging system 100 and enter temperature equilibrium.In the case, control module 104 suspends thermal equilibrium control.When thermal equilibrium control is suspended, the output power before maintenance suspends by power model 106 and the voltage set value Vset of correspondence and current setting value Iset.For the computing method of computing unit 204, can with further reference to the detailed description of Fig. 3.
After computing unit 204 calculates the new output power (being such as adjusted to the half of former output power) needing adjustment, the setting unit 206 being coupled in computing unit 204 produces the voltage set value Vset and current setting value Iset that correspond to this new output power.In one embodiment, the power model 106 of charging system 100 keeps constant to the voltage set value Vset that battery (not shown) provides.In an embodiment of the present invention, " essence is constant " represents that voltage set value Vset can slightly change (such as, being subject to ambient temperature impact), but remains in a suitable variation range.In the case, corresponding to the output power that this is new, setting unit 206 arranges new current setting value Iset suitably and keeps voltage set value Vset essence constant.In another embodiment, the voltage set value Vset alterable that provides to battery (not shown) of the power model 106 of charging system 100.In the case, corresponding to the output power that this is new, setting unit 206 arranges new voltage set value Vset and new current setting value Iset suitably.
In addition, judging unit 202 can also C.T. value T and maximum operation (service) temperature (such as 100 DEG C).Maximum operation (service) temperature that if temperature value T rises to (being more than or equal to), the judged result of judging unit 202 is: occur excess temperature situation.In the case, the output power that computing unit 204 calculates in real time is 0 watt.Such as, can according to the look-up table stored in computing unit 204, finding out corresponding output power when temperature value T is more than or equal to maximum operation (service) temperature is 0 watt.Setting unit 206 produces the voltage set value Vset and current setting value Iset that correspond to 0 watt.Such as, can according to the look-up table stored in setting unit 206, finding out output power is that the voltage that 0 watt-hour is corresponding arranges Vset and current setting value Iset, thus makes power model 106 stop output power, and then temperature value T is reduced gradually.Then, judging unit 202 can C.T. value T and recovery temperature (such as 65 DEG C) further.Recovery temperature that if temperature value T drops to (being less than or equal to), the judged result of judging unit 202 is: recovered normal.In the case, the output power that computing unit 204 calculates in real time is rated power, such as, can according to the look-up table stored in computing unit 204, finding out corresponding output power when temperature value T is less than or equal to recovery temperature is rated power.Setting unit 206 produces the voltage set value Vset and current setting value Iset that correspond to rated power.Such as, according to the look-up table stored in setting unit 206, the voltage set value Vset corresponding with rated power and current setting value Iset can be found out, thus make power model 106 recover to export rated power.
Figure 3 shows that the change schematic diagram of output power in temperature controlled processes according to an embodiment of the invention and temperature.Composition graphs 1 and Fig. 2 are described by Fig. 3, and the output power P(overstriking comprising the power model 106 of charging system 100 shows) and the temperature value T that senses of the sensor 102 of charging system 100.In operation, at time point t0, charging system 100 is started working, and such as, power model 106 provides rated power to charge to battery (not shown).Charging system 100 distribute heat in charging process, thus the temperature value T that sensor 102 senses increases gradually.At time point t1, the temperature value T that sensor 102 senses increases to thermal equilibrium threshold temperature, such as 75 DEG C, and control module 104 starts to carry out thermal equilibrium control.But, in another embodiment of the present invention, even if temperature value T does not also increase to thermal equilibrium threshold temperature, once the variable quantity △ T of temperature value T is greater than the temperature variation threshold value (namely temperature value T changes very fast) preset, control module 104 also can carry out thermal equilibrium control, and its more details can with reference to the description in subsequent figure 7.
Particularly, in the example of fig. 3, in the time period between time point t1 to t2, control module 104 can calculate output power in real time according to formula (1):
△P=-a*△T+d，（a>0）(1)
Wherein, as mentioned above, suppose that the sampling time interval of sensor 102 is ti(and is, unit interval), the difference (that is, T (t+ti)-T (t)) put in sampling time between the temperature value T (t+ti) of t+ti and temperature value T (t) of upper sampling time point t is defined as the variable quantity △ T of the temperature value T in the unit interval.Accordingly, the variable quantity (that is, P (t+ti)-P (t)) of the output power P in the △ P representation unit time.Thus the variable quantity △ P of the output power P in the unit interval and the variable quantity △ T of temperature value T is inversely proportional to (such as, linearly inverse relation).If temperature value T increases (that is, the variable quantity △ T of temperature value T is just), then namely control module 104 reduces output power P(, and the variable quantity △ P of output power is negative); If temperature value T reduces (that is, the variable quantity △ T of temperature value T is negative), then namely control module 104 increases output power P(, and the variable quantity △ P of output power is just); And if temperature value T constant (that is, the variable quantity △ T of temperature value T is zero), then control module 104 keeps output power P essence constant (that is, the variable quantity △ P essence of output power is zero).According to different application demands, the parameter a of linear function and d suitably can be set to adjust the relation between temperature value T and output power P.In alternative embodiment, control module 104 can also calculate output power in real time according to formula (2):
Wherein, P
volumerepresent rated power, T
maxrepresent maximum operation (service) temperature, and T
recoverrepresent recovery temperature.
As can be seen from Fig. 3, along with the increase of temperature value T, output power P constantly reduces, thus makes the increase of temperature value T more and more milder.The variable quantity △ T of the temperature value T in any one unit interval in the time period between time point t2 to t3 is approximately 0, and namely temperature value T keeps constant substantially, is considered as charging system 100 and enters temperature equilibrium.Accordingly, in the time period between time point t2 to t3, control module 104 suspends thermal equilibrium control, the output power that power model 106 will keep before time-out.At time point t3, the temperature value T that sensor 102 senses starts to decline, and namely charging system 100 loses equalized temperature, and control module 104 starts to carry out thermal equilibrium control.In time period between time point t3 to t4, control module 104 can calculate output power in real time according to formula (1) or (2) and constantly increase output power P.
The variable quantity △ T of the temperature value T in any one unit interval in the time period between time point t4 to t5 is approximately 0, and namely temperature value T keeps constant substantially, is considered as charging system 100 and enters temperature equilibrium.Accordingly, in the time period between time point t4 to t5, control module 104 suspends thermal equilibrium control, the output power that power model 106 will keep before time-out.At time point t5, the temperature value T that sensor 102 senses starts to increase, and namely charging system 100 loses equalized temperature, and control module 104 starts to carry out thermal equilibrium control.In time period between time point t5 to t6, control module 104 can calculate output power in real time according to formula (1) or (2) and constantly reduce output power P.
The class of operation of the time period between time point t6 to t8 is similar to the operation of the time period between time point t2 to t4.The variable quantity △ T of the temperature value T in any one unit interval in the time period between time point t6 to t7 is approximately 0, and namely temperature value T keeps constant substantially, is considered as charging system 100 and enters temperature equilibrium.Accordingly, in the time period between time point t6 to t7, control module 104 suspends thermal equilibrium control, the output power that power model 106 will keep before time-out.At time point t7, the temperature value T that sensor 102 senses starts to decline, and namely charging system 100 loses equalized temperature, and control module 104 starts to carry out thermal equilibrium control.In time period between time point t7 to t8, control module 104 can calculate output power in real time according to formula (1) or (2) and constantly increase output power P.At time point t8, the temperature value T that sensor 102 senses is reduced to thermal equilibrium threshold temperature, such as 75 DEG C, and control module 104 does not need carry out thermal equilibrium control and output power P is reverted to rated power.
It will be appreciated by those skilled in the art that, formula (1) or (2) not restriction of the present invention, in other embodiments, control module 104 also can calculate output power according to other formula (such as, quadratic function etc.) being different from formula (1) or (2) in real time.
Figure 4 shows that the change schematic diagram of output power in temperature controlled processes according to another embodiment of the invention and temperature.Composition graphs 1 and Fig. 3 are described by Fig. 4.Although in the example in fig. 4, maximum operation (service) temperature is greater than thermal equilibrium threshold temperature and thermal equilibrium threshold temperature is greater than recovery temperature, and in other example, thermal equilibrium threshold temperature can equal recovery temperature.In time period between time point t9 to t10, temperature value T is greater than thermal equilibrium threshold temperature and the variable quantity △ T of temperature value T in any one unit interval between t9 to t10 is approximately 0, namely temperature value T keeps constant substantially, is considered as charging system 100 and is in temperature equilibrium.Accordingly, in the time period between time point t9 to t10, control module 104 suspends thermal equilibrium control, the output power that power model 106 will keep before time-out.At time point t10, the temperature value T that sensor 102 senses starts to increase, and namely charging system 100 loses equalized temperature, and control module 104 starts to carry out thermal equilibrium control.In time period between time point t10 to t11, control module 104 can calculate output power in real time according to formula (1) or (2) and constantly reduce output power P.At time point t11, the temperature value T that sensor 102 senses increases to maximum operation (service) temperature, such as 100 DEG C, and control module 104 makes power model 106 stop output power, and namely output power P reduces to 0.Owing to stopping output power, the temperature value T that sensor 102 senses reduces gradually.At time point t12, temperature value T is down to recovery temperature, such as 65 DEG C, and control module 104 makes power model 106 recover to export rated power, and the temperature value T that sensor 102 senses accordingly starts to increase.After time point t12, because temperature value T is less than thermal equilibrium threshold temperature, control module 104 does not need to carry out thermal equilibrium control.Subsequent operation can with reference to the description in figure 3.
Fig. 5 and the process flow diagram that Figure 6 shows that the temperature-controlled process 500 undertaken by charging system 100 according to an embodiment of the invention.Composition graphs 1 to Fig. 4 is described by Fig. 5 and Fig. 6.The concrete steps that Fig. 5 and Fig. 6 is contained are only example.That is, the present invention's step of being applicable to other rational flow process or Fig. 5 and Fig. 6 being improved.
As shown in Figure 5, first, in step 502, by sensor, such as, sensor 102, real-time sampling temperature value T.
In step 504, control module, such as, control module 104, judges whether temperature value T is greater than thermal equilibrium threshold temperature (such as 75 DEG C).If not, then forward step 506 to, charging system 100 exports rated power, and performs step 502 after procedure 506, namely continues real-time sampling temperature value T, and carries out corresponding subsequent step.If so, then forward step 508 to, charging system 100 reduces output power, and its circular can the description of reference diagram 3, for for purpose of brevity, does not separately repeat.
Then, in step 510, control module 104 judges whether charging system 100 enters temperature equilibrium, such as, by judging whether the variable quantity △ T of the temperature value T in the unit interval (such as, the sampling time interval ti of sensor) is approximately 0.If not, then return step 502, continue real-time sampling temperature value T and carry out corresponding subsequent step.If so, then forward step 512 to, control module 104 suspends thermal equilibrium control, and control module 104 controls the output power before charging system 100 keeps suspending.
Then, in the step 514, whether control module 104 continues detected temperatures value T and changes, and if not, then forwards step 512 to, and control module 104 controls charging system 100 and continues to export this new power.
As shown in Figure 6, if judge in step 514 that change appears in temperature value T, then judge that temperature value T becomes large or diminishes in step 602 further.If become large, then forward step 610 to, judge whether temperature value T is more than or equal to maximum operation (service) temperature (such as, 100 DEG C).If so, then forward step 612 to, control module 104 controls charging system 100 and stops power stage.Then, in step 614, judge whether temperature value T is less than or equal to recovery temperature (such as, 65 DEG C).If so, then forward the step 506 shown in Fig. 5 to, charging system 100 exports rated power; If not, then return step 612, control module 104 continues to control charging system 100 and stops power stage.Refer again to step 610, if temperature value T is less than maximum operation (service) temperature (such as, 100 DEG C), then forwards the step 508 shown in Fig. 5 to, reduce output power further.
Refer again to step 602, if temperature value T diminishes, then forward step 604 to, judge whether temperature value T is less than or equal to thermal equilibrium threshold temperature (such as 75 DEG C).If so, then do not need to carry out thermal equilibrium control, forward step 506 to, charging system 100 exports rated power.If not, then forward step 606 to, charging system 100 increases output power, and its circular can the description of reference diagram 3, for for purpose of brevity, does not separately repeat.
Then, in step 608, control module 104 judges whether the temperature of charging system 100 enters temperature equilibrium, such as, by judging whether the variable quantity △ T of the temperature value T in the unit interval is approximately 0.If not, then return step 606, increase output power further.If so, then forward step 512 to, control module 104 suspends thermal equilibrium control, and control module 104 controls the output power before charging system 100 keeps suspending.
Figure 7 shows that the process flow diagram of the temperature-controlled process 700 undertaken by charging system according to another embodiment of the invention.Composition graphs 1 to Fig. 4 is described by Fig. 7, and the temperature-controlled process 700 shown in Fig. 7 suitably can combinationally use with the temperature-controlled process 500 shown in Fig. 5 and Fig. 6.
In a step 702, by sensor, such as, sensor 102, real-time sampling temperature value T.
In step 704, control module, such as, control module 104, judges whether the variable quantity △ T of the temperature value T in the unit interval (such as, the sampling time interval ti of sensor) is greater than the temperature variation threshold value preset.If the variable quantity △ T of temperature value T is greater than temperature variation threshold value, represent that temperature value T change is very fast, control module 104 needs to carry out thermal equilibrium control and adjusts output power in real time according to the variable quantity △ T of temperature value T.If not, then forward step 706 to, charging system 100 keeps output power.If so, then forward step 708 to, charging system 100 calculates the power △ P needing to reduce, and its circular can the description of reference diagram 3, for for purpose of brevity, does not separately repeat.Then, in step 720, the power △ P that control module 104 reduces according to calculated needs adjusts output power P.Then, then return step 702, sensor continues real-time sampling temperature value T and carries out corresponding subsequent step.
As previously mentioned, the embodiment of the invention discloses temperature-control circuit, method and charging system.Advantageously, temperature-control circuit provided by the invention, method and charging system, can adjust the output power of charging system neatly, therefore, not only avoid the generation of overheat condition, and improve the efficiency of charging system according to temperature value.
Some part in following specific descriptions be with flow process, logical block, processing procedure and other symbol of the operation of data bit in computer memory represented present.These descriptions and representation are that the technician in data processing field passes on them the method working essence to other technician in this field most effectively.In this application, flow process, logical block, processing procedure or similar things, be contemplated into the sequence of coherent step or instruction to realize the result wanted.Described step is the step needing to carry out physical quantity physical operations.Usually, but be not inevitable, the form of these physical quantitys can be electrical or magnetic signal, can be stored in computer systems, which, transmits, merges and compare etc.Main for the cause generally used, be sometimes convenient to above-mentioned signal to be considered as transaction, bit, numerical value, element, symbol, character, sampling, pixel or other.
The present invention is described above according to the block diagram of example embodiment reference system of the present invention, method, device and/or computer program and process flow diagram.It will be understood by those skilled in the art that the combination of the frame in one or more frame in block diagram and process flow diagram and block diagram and process flow diagram, can be realized by computer-executable program instructions respectively.Similarly, according to some embodiments of the present invention, some frames in block diagram and process flow diagram can unnecessaryly carry out with the order presented, or can unnecessaryly carry out.
Embodiment and accompanying drawing are only the conventional embodiment of the present invention above.Obviously, various supplement, amendment and replacement can be had under the prerequisite not departing from the present invention's spirit that appended claim book defines and protection domain.It should be appreciated by those skilled in the art that the present invention can change in form, structure, layout, ratio, material, element, assembly and other side under the prerequisite not deviating from invention criterion according to concrete environment and job requirement in actual applications to some extent.Therefore, be only illustrative rather than definitive thereof in the embodiment of this disclosure, the scope of the present invention is defined by appended claim and legal equivalents thereof, and the description before being not limited thereto.
Claims (30)
1. for a temperature-control circuit for charging system, it is characterized in that, described temperature-control circuit comprises:
Judging unit, for receiving the temperature value of sensor, and compares described temperature value to thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively and produces corresponding judged result;
Computing unit, is coupled in described judging unit, for calculating output power in real time according to described judged result; And
Setting unit, is coupled in described computing unit, for generation of corresponding to the voltage set value of described output power and current setting value to power model,
Wherein, calculating in the process of described output power in real time according to described judged result, the variable quantity of the described temperature value of described judging unit also in the comparative unit time and predetermined temperature variation threshold value, if the variable quantity of described temperature value is greater than described predetermined temperature variation threshold value, then be judged as that described temperature-control circuit needs to carry out thermal equilibrium control, and described computing unit adjusts described output power in real time according to the variable quantity of described temperature value.
2. the temperature-control circuit for charging system according to claim 1, is characterized in that, described voltage set value keeps constant.
3. the temperature-control circuit for charging system according to claim 1, it is characterized in that, during thermal equilibrium control, the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then described computing unit reduces described output power; If described temperature value reduces, then described computing unit increases described output power; And if described temperature value is constant, then described computing unit keeps described output power constant.
4. the temperature-control circuit for charging system according to claim 3, is characterized in that, during thermal equilibrium control, and the variable quantity of the described output power in the described unit interval and the variable quantity linearly inverse relation of described temperature value.
5. the temperature-control circuit for charging system according to claim 1, it is characterized in that, if described temperature value is more than or equal to described maximum operation (service) temperature, for there is excess temperature situation in described judged result, and described setting unit makes described power model stop output power, the more described temperature value of described judging unit and described recovery temperature, if described temperature value is less than or equal to described recovery temperature, described judged result is for recover normal, and described setting unit makes described power model export rated power.
6. the temperature-control circuit for charging system according to claim 1, is characterized in that, described maximum operation (service) temperature is greater than described thermal equilibrium threshold temperature and described thermal equilibrium threshold temperature is more than or equal to described recovery temperature.
7. for a temperature-control circuit for charging system, it is characterized in that, described temperature-control circuit comprises:
Judging unit, for receiving the temperature value of sensor, and compares described temperature value to thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively and produces corresponding judged result;
Computing unit, is coupled in described judging unit, for calculating output power in real time according to described judged result; And
Setting unit, is coupled in described computing unit, for generation of corresponding to the voltage set value of described output power and current setting value to power model,
Wherein, if described temperature value is less than or equal to described thermal equilibrium threshold temperature, described judged result is that described temperature-control circuit does not need to carry out thermal equilibrium control, and described setting unit makes described power model export rated power; If described temperature value is greater than described thermal equilibrium threshold temperature, described judged result is that described temperature-control circuit needs to carry out thermal equilibrium control, and described computing unit adjusts described output power in real time according to the variable quantity of the described temperature value in the unit interval
During thermal equilibrium control, the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then described computing unit reduces described output power; If described temperature value reduces, then described computing unit increases described output power; And if described temperature value is constant, then described computing unit keeps described output power constant.
8. the temperature-control circuit for charging system according to claim 7, is characterized in that, described voltage set value keeps constant.
9. the temperature-control circuit for charging system according to claim 7, is characterized in that, during thermal equilibrium control, and the variable quantity of the described output power in the described unit interval and the variable quantity linearly inverse relation of described temperature value.
10. the temperature-control circuit for charging system according to claim 7, it is characterized in that, if described temperature value is more than or equal to described maximum operation (service) temperature, for there is excess temperature situation in described judged result, and described setting unit makes described power model stop output power, the more described temperature value of described judging unit and described recovery temperature, if described temperature value is less than or equal to described recovery temperature, described judged result is for recover normal, and described setting unit makes described power model export rated power.
11. temperature-control circuits for charging system according to claim 7, is characterized in that, described maximum operation (service) temperature is greater than described thermal equilibrium threshold temperature and described thermal equilibrium threshold temperature is more than or equal to described recovery temperature.
12. 1 kinds, for the temperature-controlled process of charging system, is characterized in that, described temperature-controlled process comprises the following steps:
Receive the temperature value of sensor;
Described temperature value is compared with thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively, produces corresponding judged result;
Output power is calculated in real time according to described judged result; And
Produce and correspond to the voltage set value of described output power and current setting value to power model,
Wherein, described temperature-controlled process is further comprising the steps of:
Calculating in the process of described output power in real time according to described judged result, the variable quantity of the described temperature value also in the comparative unit time and predetermined temperature variation threshold value, if the variable quantity of described temperature value is greater than described predetermined temperature variation threshold value, then carries out thermal equilibrium control and adjust described output power in real time according to the variable quantity of described temperature value.
13. temperature-controlled process for charging system according to claim 12, is characterized in that, described voltage set value keeps constant.
14. temperature-controlled process for charging system according to claim 12, it is characterized in that, carry out in the step of thermal equilibrium control described, the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then reduce described output power; If described temperature value reduces, then increase described output power; And if described temperature value is constant, then keep described output power constant.
15. temperature-controlled process for charging system according to claim 12, is characterized in that, described to calculate the step of output power in real time according to described judged result further comprising the steps of:
If described temperature value is more than or equal to described maximum operation (service) temperature, described power model is made to stop output power; And
If described temperature value is less than or equal to described recovery temperature, described power model is made to export rated power.
16. 1 kinds, for the temperature-controlled process of charging system, is characterized in that, described temperature-controlled process comprises the following steps:
Receive the temperature value of sensor;
Described temperature value is compared with thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature respectively, produces corresponding judged result;
Output power is calculated in real time according to described judged result; And
Produce and correspond to the voltage set value of described output power and current setting value to power model,
It is wherein, described that to calculate the step of output power in real time according to described judged result further comprising the steps of:
If described temperature value is less than or equal to described thermal equilibrium threshold temperature, does not carry out thermal equilibrium control and make described power model export rated power; And
If described temperature value is greater than described thermal equilibrium threshold temperature, carries out thermal equilibrium control and adjust described output power in real time according to the variable quantity of the described temperature value in the unit interval,
Carry out in the step of thermal equilibrium control described, the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then reduce described output power; If described temperature value reduces, then increase described output power; And if described temperature value is constant, then keep described output power constant.
17. temperature-controlled process for charging system according to claim 16, is characterized in that, described voltage set value keeps constant.
18. temperature-controlled process for charging system according to claim 16, is characterized in that, described to calculate the step of output power in real time according to described judged result further comprising the steps of:
If described temperature value is more than or equal to described maximum operation (service) temperature, described power model is made to stop output power; And
If described temperature value is less than or equal to described recovery temperature, described power model is made to export rated power.
19. 1 kinds of charging systems, is characterized in that, described charging system comprises:
Sensor, transmits temperature value for temperature sensor;
Control module, be coupled in described sensor, for receiving described temperature value, according to described temperature value respectively with the comparing of thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature, real-time calculating output power, and produce the voltage set value and current setting value that correspond to described output power; And
Power model, is coupled in described control module, for receiving described voltage set value and described current setting value, and carries out charging operations according to described voltage set value and described current setting value,
Wherein, if described temperature value is less than or equal to described thermal equilibrium threshold temperature, described control module makes described power model export rated power; If described temperature value is greater than described thermal equilibrium threshold temperature, described control module is carried out thermal equilibrium control and is adjusted described output power in real time according to the variable quantity of the described temperature value in the unit interval,
During thermal equilibrium control, the variable quantity of the described output power in the described unit interval and the variable quantity of described temperature value are inversely proportional to, if described temperature value increases, then reduce described output power; If described temperature value reduces, then increase described output power; And if described temperature value is constant, then keep described output power constant.
20. charging systems according to claim 19, is characterized in that, described sensor comprises thermistor and digital temperature sensor.
21. charging systems according to claim 19, is characterized in that, described control module comprises:
Judging unit, for receiving described temperature value and being compared with described thermal equilibrium threshold temperature, described maximum operation (service) temperature and described recovery temperature respectively by described temperature value, produces corresponding judged result;
Computing unit, is coupled in described judging unit, for calculating described output power in real time according to described judged result; And
Setting unit, is coupled in described computing unit, gives described power model for generation of described voltage set value and described current setting value.
22. charging systems according to claim 19, is characterized in that, described charging operations provides electric power to realize to battery by described charging system.
23. charging systems according to claim 19, is characterized in that, described voltage set value keeps constant.
24. charging systems according to claim 19, is characterized in that, if described temperature value is more than or equal to described maximum operation (service) temperature, described control module makes described power model stop output power; And if described temperature value is less than or equal to described recovery temperature, described control module makes described power model recover to export rated power.
25. 1 kinds of charging systems, is characterized in that, described charging system comprises:
Sensor, transmits temperature value for temperature sensor;
Control module, be coupled in described sensor, for receiving described temperature value, according to described temperature value respectively with the comparing of thermal equilibrium threshold temperature, maximum operation (service) temperature and recovery temperature, real-time calculating output power, and produce the voltage set value and current setting value that correspond to described output power; And
Power model, is coupled in described control module, for receiving described voltage set value and described current setting value, and carries out charging operations according to described voltage set value and described current setting value,
Wherein, comparing in the process calculating described output power in real time according to described temperature value and described thermal equilibrium threshold temperature, described maximum operation (service) temperature and described recovery temperature, the variable quantity of the described temperature value of described control module also in the comparative unit time and predetermined temperature variation threshold value, if the variable quantity of described temperature value is greater than described predetermined temperature variation threshold value, then described control module is judged as needing to carry out thermal equilibrium control, and adjusts described output power in real time according to the variable quantity of described temperature value.
26. charging systems according to claim 25, is characterized in that, described sensor comprises thermistor and digital temperature sensor.
27. charging systems according to claim 25, is characterized in that, described control module comprises:
Judging unit, for receiving described temperature value and being compared with described thermal equilibrium threshold temperature, described maximum operation (service) temperature and described recovery temperature respectively by described temperature value, produces corresponding judged result;
Computing unit, is coupled in described judging unit, for calculating described output power in real time according to described judged result; And
Setting unit, is coupled in described computing unit, gives described power model for generation of described voltage set value and described current setting value.
28. charging systems according to claim 25, is characterized in that, described charging operations provides electric power to realize to battery by described charging system.
29. charging systems according to claim 25, is characterized in that, described voltage set value keeps constant.
30. charging systems according to claim 25, is characterized in that, if described temperature value is more than or equal to described maximum operation (service) temperature, described control module makes described power model stop output power; And if described temperature value is less than or equal to described recovery temperature, described control module makes described power model recover to export rated power.
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| CN201210222226.7A CN103513668B (en) | 2012-06-29 | 2012-06-29 | Temperature-control circuit, method and charging system |
| TW102121791A TWI515525B (en) | 2012-06-29 | 2013-06-19 | Circuit and method for temperature control and charging system |
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| CN201210222226.7A CN103513668B (en) | 2012-06-29 | 2012-06-29 | Temperature-control circuit, method and charging system |
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| CN105975420A (en) * | 2016-04-27 | 2016-09-28 | 乐视控股（北京）有限公司 | Charging power adjustment method and apparatus used for electronic device and electronic device |
| TWI600244B (en) * | 2016-07-26 | 2017-09-21 | 台達電子工業股份有限公司 | Power plug apparatus and over temperature protection method thereof |
| CN107277953B (en) * | 2017-07-13 | 2020-09-01 | 浙江绍兴苏泊尔生活电器有限公司 | Constant temperature control method for induction cooker and induction cooker |
| CN108954482A (en) * | 2018-05-29 | 2018-12-07 | 广东美的环境电器制造有限公司 | A kind of control method, device and computer readable storage medium |
| CN109450005A (en) * | 2018-10-30 | 2019-03-08 | 北京小米移动软件有限公司 | The control method and device of insert row |
| CN110626198A (en) * | 2019-09-12 | 2019-12-31 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | Method and system for searching heat balance power for charging pile |
| CN112558740B (en) * | 2019-09-26 | 2024-02-13 | 戴尔产品有限公司 | Charging system for spare equipment of component throttling power |
| CN113224804B (en) * | 2020-02-04 | 2024-04-09 | 华为技术有限公司 | Charging control method and electronic device |
| CN111679597B (en) * | 2020-05-13 | 2023-04-07 | 深圳拓邦股份有限公司 | Electronic product power control method and device and electronic product |
| CN113889680A (en) * | 2020-07-03 | 2022-01-04 | 北京小米移动软件有限公司 | Battery charging method and device, and storage medium |
| CN111900771A (en) * | 2020-07-07 | 2020-11-06 | 珠海市魅族科技有限公司 | Charging control method, device, equipment and medium |
| CN112332648B (en) | 2020-11-13 | 2022-09-27 | 山特电子（深圳）有限公司 | Device and method for actively balancing thermal performance of parallel power devices |
| CN115313531A (en) * | 2021-05-06 | 2022-11-08 | 施耐德电气（澳大利亚）有限公司 | Charging device and charging method |
| CN114274822A (en) * | 2021-12-30 | 2022-04-05 | 江西五十铃汽车有限公司 | Control method and device for charging power of new energy automobile, storage medium and equipment |
| CN114389520A (en) * | 2021-12-30 | 2022-04-22 | 江苏银河数字技术有限公司 | Motor driver control method and device, storage medium and electronic equipment |
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| TWI515525B (en) | 2016-01-01 |
| CN103513668A (en) | 2014-01-15 |
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