CN105048583A - Battery charging method and circuit - Google Patents
Battery charging method and circuit Download PDFInfo
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- CN105048583A CN105048583A CN201510483624.8A CN201510483624A CN105048583A CN 105048583 A CN105048583 A CN 105048583A CN 201510483624 A CN201510483624 A CN 201510483624A CN 105048583 A CN105048583 A CN 105048583A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a battery charging method and circuit. The battery charging circuit comprises a detection module, a comparison module, a control module and an adjustment module, wherein the detection module is used for detecting a working load current value of a terminal and determining a load signal according to the working load current value; the comparison module is used for determining a comparison signal according to the load signal, the comparison signal indicates the size of the load signal, and the output end of the comparison module is connected with the output end of the control module; the control module is used for determining that a charging current value is adjusted to an adjustment signal, mapped by the working load current value, of the charging current value according to the comparison signal, and the output end of the control module is connected with the input end of the adjustment module; and the adjustment module is used for adjusting the charging current value according to the adjustment signal, and the charging current value adjusted according to the adjustment signal is in a negative correlation with the working load current value.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to a kind of method for charging batteries and circuit.
Background technology
More and more higher along with chip computing capability, the power consumption of chip also increases thereupon, and then causes caloric value also increasing.For portable terminal, power consumption is generally divided into two parts: the power consumption produced when the power consumption produced during rechargeable battery charging and terminal works.
If while equipment charges to rechargeable battery, be in normal operating conditions again, control chip and the charging management chip of terminal are all in higher load condition, cause the power consumption of whole terminal just can increase suddenly, and produce more heat, in such cases, the reliability of terminal can reduce greatly.Therefore, how reducing the terminal high power consumption caused of operationally carrying out charging is a urgent problem.
Summary of the invention
The embodiment of the present invention provides a kind of method for charging batteries and circuit, operationally to carry out charging the excessive problem of the power consumption that causes in order to solve terminal.
The embodiment of the present invention provides a kind of battery charger, comprising:
Detection module, for the operating load current value of sense terminals, and according to described operating load current value determination load signal;
Comparison module, for according to described load signal determination comparison signal, described comparison signal indicates the size of described load signal, and the output of described comparison module is connected with the output of control module;
Described control module, for determining conditioning signal charging current value being adjusted to the charging current value that described operating load current value maps according to described comparison signal, the output of described control module is connected with the input of adjustment module;
Described adjustment module, for regulating charging current value according to described conditioning signal, the charging current value that described conditioning signal regulates becomes negative correlativing relation with described operating load current value.
Preferably, described detection module comprises detection resistance and the amplifier with described detection resistor coupled in parallel;
Described amplifier determines described operating load current value by detecting the current value flowing through described detection resistance, and described operating load current value is converted to described load signal.
Preferably, described load signal is relative load magnitude of voltage;
Described comparison module comprises N number of comparator, the first input end of each comparator is connected with the output of described detection module, and the second input of each comparator is connected with a reference voltage, wherein, N is positive integer, and the magnitude of voltage of N number of reference voltage increases progressively successively;
The output of described comparison module is made up of the output of described N number of comparator, exports the comparison signal of N position.
Preferably, described control module comprises the decoding circuit of N number of address input end, and the annexation of N number of output of described N number of address end input and described comparison module is determined by the mapping relations of comparison signal and conditioning signal;
Described control module comprises M output, exports the conditioning signal of M position, wherein M=N+1;
A described M output only has an output to export the first level at every turn, and all the other N number of outputs export second electrical level; Described first level is high level, and described second electrical level is low level, or described first level is low level, and described second electrical level is high level.
Preferably, the annexation of N number of output of described N number of address end input and described comparison module is:
In described comparison module, K output is connected with K address input end of described control module, and wherein, the reference voltage of the comparator that K output is corresponding comes K according to the order from small to large of reference voltage in comparator, and K is less than or equal to N.
Preferably, for J output in a described control module M output, this output is in described decoding circuit the 2nd
j-1individual decoding output, wherein, 1≤J≤M.
Preferably, described adjustment module comprises regulating circuit and the constant-resistance circuit of M parallel connection, the switching circuit that each regulating circuit comprises a regulating resistance and connects with this regulating resistance, the control end of M switching circuit is M input of described adjustment module, and the resistance of M regulating resistance increases progressively successively;
For a regulating circuit, in this regulating circuit, the first end of regulating resistance is connected with the first end of the switching circuit in this regulating circuit, in this regulating circuit, the second end of regulating resistance connects power supply, and the second end of this regulating circuit breaker in middle circuit is connected with the input of described constant-resistance circuit;
Second end and the charging current control end of the input of described constant-resistance circuit and the switching circuit in described M regulating circuit in parallel are connected, the output head grounding of described constant-resistance circuit, described constant-resistance circuit provides control voltage, the magnitude of voltage of described control voltage and described charging current value positive correlation for described charging current control end;
In described M in parallel regulating circuit in the control end of P switching circuit and the described decoding circuit of described control module the 2nd
p-1individual decoding output connects, and wherein, comes P with the regulating resistance of described P switching circuit in series according to the resistance order from small to large of M regulating resistance.
The embodiment of the present invention provides a kind of method for charging batteries, comprising:
The operating load current value of sense terminals, and the load signal determining described terminal according to described operating load current value;
Generate comparison signal according to described load signal, described comparison signal indicates the size of described load signal;
Mapping relations according to comparison signal and conditioning signal generate the conditioning signal mapped with described comparison signal;
According to described conditioning signal, charging current value is adjusted to the charging current value of described operating load current value mapping, negative correlation between the charging current value that described conditioning signal regulates and described operating load current value.
Preferably, the operating load current value of described sense terminals, and the load signal determining described terminal according to described operating load current value, comprising:
By the operating load current value of amplifier sense terminals, and by described amplifier, the described operating load current value detected is converted to load signal.
Preferably, described load signal is relative load magnitude of voltage;
Described according to described load signal generation comparison signal, comprising:
Described relative load magnitude of voltage and N number of reference voltage are compared, generate the comparison signal of N position according to comparative result, wherein, N is positive integer, and the magnitude of voltage of N number of reference voltage increases progressively successively.
Preferably, determine according to described comparison signal conditioning signal charging current value being adjusted to the charging current value that described operating load current value maps, comprising:
According to operating load current value and the mapping relations determination comparison signal of charging current value and the mapping relations of conditioning signal;
Generated the conditioning signal mapped with described comparison signal by decoding circuit, the input signal of described decoding circuit and the mapping relations of output signal are the mapping relations of described comparison signal and conditioning signal.
Preferably, regulate charging current value according to described conditioning signal, comprising:
Determine according to described operating load current value the charging current value that described operating load current value maps, and current charging current value is adjusted to the charging current value of described operating load current value mapping according to described conditioning signal.
The method provided according to the embodiment of the present invention and circuit, after operating load current value terminal being detected, regulate charging current value according to the conditioning signal that operating load current value generates, the charging current value that conditioning signal regulates becomes negative correlativing relation with described operating load current value.Therefore, when operating load current value becomes large, the charging current value after adjustment diminishes; When operating load current value diminishes, the charging current value after adjustment becomes large, thus ensures that the total power consumption of terminal can not increase suddenly, thus it is excessive to solve power consumption when terminal is charged simultaneously and works, and produces the problem that heat is more.
Accompanying drawing explanation
A kind of battery charger structural representation that Fig. 1 provides for the embodiment of the present invention;
A kind of detection module structural representation that Fig. 2 provides for the embodiment of the present invention;
A kind of comparison module structural representation that Fig. 3 provides for the embodiment of the present invention;
A kind of adjustment module structural representation that Fig. 4 provides for the embodiment of the present invention;
A kind of method for charging batteries flow chart that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with Figure of description, the embodiment of the present invention is described in detail.
Terminal in the embodiment of the present invention can be portable ultrasonic diagnostic equipment.Portable ultrasonic diagnostic equipment measures the physiology of human body or the data of institutional framework and form by ultrasonic detecting technology, thus finds or detect disease.Ultrasonic diagnostic technique has the advantage such as safety, Non-Destructive Testing.
Terminal in the embodiment of the present invention can also be the terminal such as mobile phone, panel computer.
As shown in Figure 1, be a kind of battery charger structural representation that the embodiment of the present invention provides.In Fig. 1, comprising:
Detection module 101, for the operating load current value of sense terminals 100, and according to described operating load current value determination load signal.
Comparison module 102, for according to described load signal determination comparison signal, described comparison signal indicates the size of described load signal, and the output of described comparison module 102 is connected with the output of control module 103.
Described control module 103, for determining conditioning signal charging current value being adjusted to the charging current value that described operating load current value maps according to described comparison signal, the output of described control module 103 is connected with the input of adjustment module 104.
Described adjustment module 104, for regulating charging current value according to described conditioning signal, the charging current value that described conditioning signal regulates becomes negative correlativing relation with described operating load current value.
Charging management chip 105 is also comprised in Fig. 1, the charging current control end of charging management chip 105 is connected with the output of adjustment module 104, adjustment module 104 regulates charging current value, the magnitude of voltage of the control voltage of charging current control end and charging current value positive correlation by regulating the control voltage of the charging current control end of charging management chip 105.
Charging management chip 105 is connected with rechargeable battery 106, carries out Charge Management to rechargeable battery 106.
It should be noted that, charging management chip 105 can be any one charging management chip, and the embodiment of the present invention does not limit this.
In Fig. 1, the size of charging current value is regulated by conditioning signal, and conditioning signal is generated by comparison signal, and comparison signal is determined by the size of operating load current value.Therefore can set up the mapping relations between operating load current value and charging current value, in the mapping relations of foundation, charging current value becomes negative correlativing relation with operating load current value.
According to the mapping relations between operating load current value and charging current value, the mapping relations of comparison signal and conditioning signal can be determined.After determining comparison signal, just can determine the conditioning signal that comparison signal maps, and charging current value is adjusted to the charging current value of this operating load current value mapping by this conditioning signal.
Detection module 101 can have multiple implementation, and a kind of possible implementation as shown in Figure 2, is a kind of detection module structural representation that the embodiment of the present invention provides.In Fig. 2, detection module comprises detection resistance 201 and the amplifier 202 with described detection resistor coupled in parallel.
Amplifier 202 determines described operating load current value by detecting the current value flowing through described detection resistance 201, and described operating load current value is converted to described load signal, and described load signal is relative load magnitude of voltage.
Optionally, amplifier 202 is generally differential amplifier.The input resistance of differential amplifier is very large, and bias current is very little again, and the detection module 101 be therefore made up of differential amplifier can not impact the operating load of terminal 100.
The relation of the relative load magnitude of voltage that differential amplifier exports and operating load current value can represent with formula below:
V
out＝G×R
Z×I…………………………(1)
Wherein, G is the multiplication factor of differential amplification electrical equipment, R
zfor detecting the resistance of resistance 201, I is operating load current value, V
outfor relative load magnitude of voltage.
It should be noted that, in order to ensure that detecting resistance 201 can not impact the operating load of terminal 100, detect resistance 201 resistance should very little and resistance to flow valuve enough large, the general resistance detecting resistance 201 is between 1 ohm to 5 ohm.
Comparison module 102 can have multiple implementation, composition graphs 1 and Fig. 2, and a kind of possible implementation as shown in Figure 3, is a kind of comparison module structural representation that the embodiment of the present invention provides.In Fig. 3, comparison module 102 comprises N number of comparator, N number of comparator is respectively comparator 1 to comparator N, the output output of N number of comparator is respectively Comp1 to CompN, and the first input end of each comparator is connected with the output of described detection module, and the second input of each comparator is connected with a reference voltage, be respectively VREF1 to VREFN, wherein, N is positive integer, and the magnitude of voltage of N number of reference voltage increases progressively successively; The output of described comparison module 102 is made up of the output of described N number of comparator, exports the comparison signal of N position.
The concrete value of the N number of reference voltage VREF1 to VREFN in Fig. 3 can go to choose according to actual conditions, does not repeat them here.
Comparison module 102 pairs of load signals compare, thus determine the scope of operating load current value.
For example, comparison module 102 comprises 3 comparators, output is respectively: Comp1, Comp2, Comp3, and the reference voltage of access is respectively VREF1, VREF2, VREF3, and meets VREF1<VREF2<VREF3.
As the relative load magnitude of voltage V determined according to operating load current value
outmeet V
outduring <VREF1, in comparison module 102, the output of three comparators is low level, and the comparison signal that comparison module 102 exports 3 is: [0,0,0];
As the relative load magnitude of voltage V determined according to operating load current value
outmeet VREF1<V
outduring <VREF2, Comp1 in comparison module 102 exports as high level, and Comp2, Comp3 export as low level, and the comparison signal that comparison module 102 exports 3 is: [0,0,1];
As the relative load magnitude of voltage V determined according to operating load current value
outmeet VREF2<V
outduring <VREF3, Comp1, Comp2 in comparison module 102 export as high level, and Comp3 exports as low level, and the comparison signal that comparison module 102 exports 3 is: [0,1,1];
As the relative load magnitude of voltage V determined according to operating load current value
outmeet VREF3<V
out, Comp1, Comp2, Comp3 in comparison module 102 export and are high level, and the comparison signal that comparison module 102 exports 3 is: [1,1,1].
It should be noted that, in comparison module 102, the quantity of comparator can be determined according to actual conditions.
In the embodiment of the present invention, control module 103 can have multiple implementation, possible implementation is: control module 103 comprises a decoding circuit for N number of address input end, and the annexation of N number of output of described N number of address end input and described comparison module 102 is determined by the mapping relations of comparison signal and conditioning signal;
Described control module 103 comprises M output, exports the conditioning signal of M position, wherein M=N+1; A described M output only has an output to export the first level at every turn, and all the other N number of outputs export second electrical level; Described first level is high level, and described second electrical level is low level, or described first level is low level, and described second electrical level is high level.
The mapping relations of comparison signal and conditioning signal are determined by the mapping relations of operating load current value and charging current value, for:
The comparison signal indicating described relative load magnitude of voltage to be less than Q reference voltage in described N number of reference voltage maps the conditioning signal that Q position is the first level;
The comparison signal indicating described relative load magnitude of voltage to be greater than Q reference voltage in described N number of reference voltage maps the conditioning signal that Q+1 position is the first level.
For example, in conjunction with description above, instruction relative load magnitude of voltage V
outthe comparison signal being less than the 1st reference voltage in 3 reference voltages is: [0,0,0], and the 1st of the conditioning signal that this comparison signal maps is the first level.
Again for example, in conjunction with description above, instruction relative load magnitude of voltage V
outthe comparison signal being greater than the 3rd reference voltage in 3 reference voltages is: [1,1,1], and the 4th of the conditioning signal that this comparison signal maps is the first level.
Decoding circuit generally can be made up of decoder and inverter, and decoder can be 3-8 decoder, 4-16 decoder etc., specifically can select according to actual conditions.The input of inverter connects a decoding output of decoder, and the output of inverter is as the output of control module 103.
Can determine whether as required to adopt inverter.If M output of the control module 103 of design is for only have an output output low level at every turn, all the other N number of outputs export high level, so can not adopt inverter; If M output of the control module 103 of design exports high level for only having an output at every turn, all the other N number of output output low levels, the signal that inverter so can be adopted to be exported by decoding circuit carries out anti-phase.
Annexation in control module 103 between N number of address end input and N number of output of comparison module 102 can have various ways, preferably, the annexation of the described N number of address end input determined according to the mapping relations of comparison signal and conditioning signal and N number of output of described comparison module 102 is:
In comparison module 102, K output is connected with K address input end of described control module 103, and wherein, the reference voltage of the comparator that K output is corresponding comes K according to the order from small to large of reference voltage in comparator, and K is less than or equal to N.
Optionally, control module 103 comprises N number of address input end, in comparison module 102, K output CompK is connected with K address input end of described control module 103, wherein, the reference voltage of the comparator that K output is corresponding comes K according to the order from small to large of reference voltage in comparator, and K is less than or equal to N.
Decoding circuit in control module 103 has multiple decoding output, but be not that each decoding output can, as the output of control module 103, need during actual use to determine required decoding output according to the mapping relations of comparison signal and conditioning signal.Preferably, according to the mapping relations of above-described comparison signal and conditioning signal, for J output in a described control module M output, this output is in described decoding circuit the 2nd
j-1individual decoding output, wherein, 1≤J≤M.
It should be noted that, in decoding circuit, untapped decoding output can be unsettled.
For example, in conjunction with description above, the decoding circuit in control module 103 is 3-8 decoder, and its input/output relation is as shown in table 1.
Table 1
In table 1, A, B, C represent 3 address input ends in decoding circuit respectively, and Y0 to Y7 represents 8 decoding outputs of decoding circuit.Comparison signal may be the part in input signal, and in the output signal of therefore decoding circuit, only some can as conditioning signal.Such as, as shown in table 2, be the mapping relations of comparison signal and conditioning signal.
Table 2
In table 2, Comp1, Comp2, Comp3 are the signal that the output of the comparator generating comparison signal exports, and K0 to K4 is the conditioning signal that the output of control module exports.1st decoding output, the 2nd decoding output, the 4th decoding output, the 8th decoding output of the corresponding decoding circuit of K0 to K4 difference.
The mapping relations of comparison signal and conditioning signal also can be as shown in table 3:
Table 3
In the embodiment of the present invention, adjustment module 104 can have multiple implementation, and a kind of possible implementation as shown in Figure 4, is a kind of control module structural representation that the embodiment of the present invention provides.In Fig. 4, adjustment module 104 comprises regulating circuit and the constant-resistance circuit of M parallel connection, the switching circuit that each regulating circuit comprises a regulating resistance and connects with this regulating resistance, the control end of M switching circuit is M input of described adjustment module, and the resistance of M regulating resistance increases progressively successively; Output K1 to the KM position of the control end difference access control module 103 of M switching circuit, the regulating resistance of the switching circuit in series be connected with the output K1 to KM of control module 103 is respectively R1 to RM.In Fig. 4, the resistance of regulating resistance R1 to RM increases progressively successively.The resistance determining R1 to RM can certainly be gone according to actual conditions.
For a regulating circuit, in this regulating circuit, the first end of regulating resistance is connected with the first end of the switching circuit in this regulating circuit, in this regulating circuit, the second end of regulating resistance connects power supply, and the second end of this regulating circuit breaker in middle circuit is connected with the input of described constant-resistance circuit; Wherein, the power supply that the second end of regulating resistance connects is Vr;
Second end and the charging current control end of the input of described constant-resistance circuit and the switching circuit in described M regulating circuit in parallel are connected, the output head grounding of described constant-resistance circuit, described constant-resistance circuit provides control voltage for described charging current control end, the magnitude of voltage of described control voltage and described charging current value positive correlation, wherein charging current control end is an input of charging management chip 105.
In Fig. 4, constant-resistance circuit is made up of a resistance Rf.Certain constant-resistance circuit also can be made up of other forms of circuit, does not repeat them here.
In described M in parallel regulating circuit in the control end of P switching circuit and the described decoding circuit of described control module the 2nd
p-1individual decoding output connects, and wherein, comes P with the regulating resistance of described P switching circuit in series according to the resistance order from small to large of M regulating resistance.
The resistance value of the constant-resistance circuit in adjustment module 104 is determined according to actual conditions, and constant-resistance circuit generally can realize with a resistance, certainly adopts multiple resistance to realize also being fine by the mode of series connection and/or parallel connection.
It should be noted that, in the regulating circuit of M parallel connection, the switching circuit of each regulating circuit can be MOS (MetalOxideSemiconductor, metal-oxide semiconductor (MOS)) transistor.If only have a position to be low level in the conditioning signal that control module 103 exports, all the other N positions are high level, and the switching circuit of so each regulating circuit can be N-type MOS transistor; If only have a position to be high level in the conditioning signal that control module 103 exports, all the other N positions are low level, and the switching circuit of so each regulating circuit can be N-type MOS transistor.
For example, only have a position for high level in the conditioning signal exported with control module 103, all the other N positions are low level, and the switching circuit of each regulating circuit is N-type MOS transistor is example.Under this kind of scene, the control end of each switching circuit is when input high level, and switching circuit is in short circuit; The control end of each switching circuit is when input low level, and switching circuit is in open circuit.M switching circuit only has one to be in short circuit at every turn, and now the control voltage Vcon of charging current control end can determine according to following formula:
Wherein, V
rfor the magnitude of voltage of the power supply that the regulating resistance of M switching circuit connects, R
xfor the resistance of an xth regulating resistance in M switching circuit, R
ffor the resistance value of constant-resistance circuit.
In conjunction with description above, if comparison module comprises 3 comparators, then the comparison signal generated and the mapping relations of conditioning signal can be as shown in table 3.In the corresponding control module of conditioning signal, the decoding output of decoding circuit is respectively the 1st decoding output, the 2nd decoding output, the 4th decoding output, the 8th decoding output.1st decoding output is connected with the control end of the switching circuit of connecting according to the regulating resistance that order from small to large comes the 1st with resistance in adjustment module; 2nd decoding output is connected with the control end of the switching circuit of connecting according to the regulating resistance that order from small to large comes the 2nd with resistance in adjustment module; 4th decoding output is connected with the control end of the switching circuit of connecting according to the regulating resistance that order from small to large comes the 3rd with resistance in adjustment module; 8th decoding output is connected with the control end of the switching circuit of connecting according to the regulating resistance that order from small to large comes the 4th with resistance in adjustment module.When the comparison signal determined according to the operating load current value detected is [0,0,0], the conditioning signal that this comparison signal maps in table 3 is [1,0,0,0], the switching circuit short circuit of connecting according to the regulating resistance that order from small to large comes the 1st with resistance in corresponding control module, rest switch short circuit, now can determine the magnitude of voltage of control voltage end according to formula (2)
r
1to come the resistance value of the regulating resistance of the 1st according to order from small to large for resistance in control module; When the comparison signal determined according to the operating load current value detected is [0,1,1], the conditioning signal that this comparison signal maps in table 3 is [0,0,1,0], the switching circuit short circuit of connecting according to the regulating resistance that order from small to large comes the 3rd with resistance in corresponding control module, rest switch short circuit, now can determine the magnitude of voltage of control voltage end according to formula (2)
r
3the resistance value of the regulating resistance of the 3rd is come according to order from small to large, R for resistance in control module
3be greater than R
1.
In description above, comparison signal is [0,0,0] it is [0 that corresponding operating load current value is less than comparison signal, 1,1] corresponding operating load current value, but the magnitude of voltage Vcon1 of control voltage end after regulating is greater than Vcon3, therefore charging current value can be made to become negative correlativing relation with operating load current value by conditioning signal.
As shown in Figure 5, the embodiment of the present invention provides a kind of method for charging batteries, comprising:
Step 501: the operating load current value of sense terminals, and the load signal determining described terminal according to described operating load current value;
Step 502: generate comparison signal according to described load signal, described comparison signal indicates the size of described load signal;
Step 503: determine conditioning signal charging current value being adjusted to the charging current value that described operating load current value maps according to described comparison signal;
Step 504: regulate charging current value according to described conditioning signal, negative correlation between the charging current value that described conditioning signal regulates and described operating load current value.
By the operating load current value of amplifier sense terminals, and by described amplifier, the described operating load current value detected can be converted to load signal in step 501, described load signal is relative load magnitude of voltage.Specifically with reference to the description above about Fig. 1, can not repeat them here.
In step 502, the specific implementation generating comparison signal can be:
Described relative load magnitude of voltage and N number of reference voltage are compared, generate the comparison signal of N position according to comparative result, wherein, N is positive integer, and the magnitude of voltage of N number of reference voltage increases progressively successively.
Also can be realized by the mode described in Fig. 1, do not repeat them here.
In step 503, the implementation generating the conditioning signal mapped with described comparison signal can be:
According to operating load current value and the mapping relations determination comparison signal of charging current value and the mapping relations of conditioning signal;
Generated the conditioning signal mapped with described comparison signal by decoding circuit, the input signal of described decoding circuit and the mapping relations of output signal are the mapping relations of described comparison signal and conditioning signal.
It should be noted that can also there be other implementations, do not repeat them here.
Preferably, described conditioning signal is the signal of M position, wherein M=N+1;
Only have a signal to be the first level in the signal of the M position of described conditioning signal, all the other N position signals are second electrical level; Described first level is high level, and described second electrical level is low level, or described first level is low level, and described second electrical level is high level;
The mapping relations of described comparison signal and conditioning signal are:
The comparison signal indicating described relative load magnitude of voltage to be less than Q reference voltage in described N number of reference voltage maps the conditioning signal that Q position is the first level;
The comparison signal indicating described relative load magnitude of voltage to be greater than Q reference voltage in described N number of reference voltage maps the conditioning signal that Q+1 position is the first level.
In step 504, can realize regulating charging current value by adjustment module conditioning signal inputted in Fig. 1, also can regulate charging current value by other means.
Optionally, determine according to described operating load current value the charging current value that described operating load current value maps, and current charging current value is adjusted to the charging current value of described operating load current value mapping according to described conditioning signal.
For example, by conditioning signal being inputted in CPU (CentralProcessingUnit, central processing unit), CPU can be made to control charging management chip and to generate the charging current value corresponding with the conditioning signal of input.
In sum, the method provided according to the embodiment of the present invention and circuit, after operating load current value terminal being detected, regulate charging current value according to the conditioning signal that operating load current value generates, the charging current value that conditioning signal regulates becomes negative correlativing relation with described operating load current value.Therefore, when operating load current value becomes large, the charging current value after adjustment diminishes; When operating load current value diminishes, the charging current value after adjustment becomes large, thus ensures that the total power consumption of terminal can not increase suddenly, thus it is excessive to solve power consumption when terminal is charged simultaneously and works, and produces the problem that heat is more.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a battery charger, is characterized in that, comprising:
Detection module, for the operating load current value of sense terminals, and according to described operating load current value determination load signal;
Comparison module, for according to described load signal determination comparison signal, described comparison signal indicates the size of described load signal, and the output of described comparison module is connected with the output of control module;
Described control module, for determining conditioning signal charging current value being adjusted to the charging current value that described operating load current value maps according to described comparison signal, the output of described control module is connected with the input of adjustment module;
Described adjustment module, for regulating charging current value according to described conditioning signal, the charging current value that described conditioning signal regulates becomes negative correlativing relation with described operating load current value.
2. circuit as claimed in claim 1, is characterized in that, described detection module comprises detection resistance and the amplifier with described detection resistor coupled in parallel;
Described amplifier determines described operating load current value by detecting the current value flowing through described detection resistance, and described operating load current value is converted to described load signal.
3. circuit as claimed in claim 1, it is characterized in that, described load signal is relative load magnitude of voltage;
Described comparison module comprises N number of comparator, the first input end of each comparator is connected with the output of described detection module, and the second input of each comparator is connected with a reference voltage, wherein, N is positive integer, and the magnitude of voltage of N number of reference voltage increases progressively successively;
The output of described comparison module is made up of the output of described N number of comparator, exports the comparison signal of N position.
4. circuit as claimed in claim 3, it is characterized in that, described control module comprises the decoding circuit of N number of address input end, and the annexation of N number of output of described N number of address end input and described comparison module is determined by the mapping relations of comparison signal and conditioning signal;
Described control module comprises M output, exports the conditioning signal of M position, wherein M=N+1;
A described M output only has an output to export the first level at every turn, and all the other N number of outputs export second electrical level; Described first level is high level, and described second electrical level is low level, or described first level is low level, and described second electrical level is high level.
5. circuit as claimed in claim 4, it is characterized in that, the annexation of N number of output of described N number of address end input and described comparison module is:
In described comparison module, K output is connected with K address input end of described control module, and wherein, the reference voltage of the comparator that K output is corresponding comes K according to the order from small to large of reference voltage in comparator, and K is less than or equal to N.
6. circuit as claimed in claim 5, is characterized in that, for J output in a described control module M output, this output is in described decoding circuit the 2nd
j-1individual decoding output, wherein, 1≤J≤M.
7. circuit as claimed in claim 6, it is characterized in that, described adjustment module comprises regulating circuit and the constant-resistance circuit of M parallel connection, the switching circuit that each regulating circuit comprises a regulating resistance and connects with this regulating resistance, the control end of M switching circuit is M input of described adjustment module, and the resistance of M regulating resistance increases progressively successively;
For a regulating circuit, in this regulating circuit, the first end of regulating resistance is connected with the first end of the switching circuit in this regulating circuit, in this regulating circuit, the second end of regulating resistance connects power supply, and the second end of this regulating circuit breaker in middle circuit is connected with the input of described constant-resistance circuit;
Second end and the charging current control end of the input of described constant-resistance circuit and the switching circuit in described M regulating circuit in parallel are connected, the output head grounding of described constant-resistance circuit, described constant-resistance circuit provides control voltage, the magnitude of voltage of described control voltage and described charging current value positive correlation for described charging current control end;
In described M in parallel regulating circuit in the control end of P switching circuit and the described decoding circuit of described control module the 2nd
p-1individual decoding output connects, and wherein, comes P with the regulating resistance of described P switching circuit in series according to the resistance order from small to large of M regulating resistance.
8. a method for charging batteries, is characterized in that, comprising:
The operating load current value of sense terminals, and the load signal determining described terminal according to described operating load current value;
Generate comparison signal according to described load signal, described comparison signal indicates the size of described load signal;
Conditioning signal charging current value being adjusted to the charging current value that described operating load current value maps is determined according to described comparison signal;
Charging current value is regulated, negative correlation between the charging current value that described conditioning signal regulates and described operating load current value according to described conditioning signal.
9. method as claimed in claim 8, is characterized in that, the operating load current value of described sense terminals, and the load signal determining described terminal according to described operating load current value, comprising:
By the operating load current value of amplifier sense terminals, and by described amplifier, the described operating load current value detected is converted to load signal.
10. method as claimed in claim 9, it is characterized in that, described load signal is relative load magnitude of voltage;
Described according to described load signal generation comparison signal, comprising:
Described relative load magnitude of voltage and N number of reference voltage are compared, generate the comparison signal of N position according to comparative result, wherein, N is positive integer, and the magnitude of voltage of N number of reference voltage increases progressively successively.
11. methods as claimed in claim 8, is characterized in that, the described conditioning signal determining charging current value charging current value being adjusted to the mapping of described operating load current value according to described comparison signal, comprising:
According to operating load current value and the mapping relations determination comparison signal of charging current value and the mapping relations of conditioning signal;
Generated the conditioning signal mapped with described comparison signal by decoding circuit, the input signal of described decoding circuit and the mapping relations of output signal are the mapping relations of described comparison signal and conditioning signal.
12. methods as claimed in claim 11, is characterized in that, described according to described conditioning signal adjustment charging current value, comprising:
Determine according to described operating load current value the charging current value that described operating load current value maps, and current charging current value is adjusted to the charging current value of described operating load current value mapping according to described conditioning signal.
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| CN201510483624.8A CN105048583A (en) | 2015-08-07 | 2015-08-07 | Battery charging method and circuit |
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