CN203218953U - Variable constant current voltage limit charger - Google Patents
Variable constant current voltage limit charger Download PDFInfo
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- CN203218953U CN203218953U CN 201320263833 CN201320263833U CN203218953U CN 203218953 U CN203218953 U CN 203218953U CN 201320263833 CN201320263833 CN 201320263833 CN 201320263833 U CN201320263833 U CN 201320263833U CN 203218953 U CN203218953 U CN 203218953U
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Abstract
The utility model provides a variable constant current voltage limit charger. The variable constant current voltage limit charger is additionally provided with an input power detection circuit and a benchmark reference current conversion module on a basis of a constant current voltage limit charger in the prior art, power of an input power source is detected through the input power detection circuit and is transmitted to the benchmark reference current conversion module, the benchmark reference current conversion module carries out proportion conversion according to preset charging power/current, a benchmark reference current signal in a corresponding proportion is acquired according to the power of the input power source; a benchmark input end of a current error comparator is connected with the benchmark reference current signal outputted by the benchmark reference current conversion module, so the benchmark reference current signal is variable based on the power of the input power source, a power floating scope in which a storage cell can be charged by the input power source is greatly improved, energy waste caused by inconstant power of the input power source can be greatly reduced, so a problem that application of the constant current voltage limit charger is limited by inconstant output power of a work power source is solved.
Description
Technical field
The utility model relates to the accumulator charging technology field, is specifically related to a kind of variable constant current pressure limiting charger.
Background technology
Charger is widely used in the charging to all kinds of storage batterys.During charge in batteries, the positive pole of anode and charger charging output interface links, and the negative pole of battery cathode and charger charging output interface links, and the charging voltage of charging output interface output must be higher than the total electromotive force of battery.
Present widely used charger mainly contains three kinds of constant current charger, constant voltage charger and constant current pressure limiting chargers.
Constant current charger is with the output voltage of adjusting charging control circuit, keeps strength of charging current constant, and storage battery is charged; Its charging control circuit is simple, but because the current capacity accepted of storage battery is to descend gradually along with the carrying out of charging process, to the charging later stage, charging current is used for brine electrolysis more, produce gas, not only cause energy waste, also cause storage battery to be given vent to anger easily and exaggerate.The charging voltage of constant voltage charger is all keeping constant numerical value in the charging interval, and along with the rising gradually of accumulator voltage, electric current reduces gradually; Compare with the constant current charge process, the constant voltage charge process is more close to the optimal charge curve of storage battery, and the constant voltage charge control circuit is also fairly simple, but because charging initial stage storage battery electromotive force is lower, the electric current of constant voltage charge is bigger, might surpass the several times of the maximum loaded current of battery, therefore the life of storage battery is made a big impact, make the accumulator plate bending easily, even cause battery to scrap.
Design has internal reference reference current and internal reference reference voltage in the charging circuit of constant current pressure limiting charger, when battery tension is low, to charge in batteries, the charging current in this stage is constant, charging voltage becomes greatly (but being not more than the internal reference reference voltage) gradually with certain constant current (being the internal reference reference current that its circuit is set) for constant current pressure limiting charger; Along with charging process is carried out, when battery tension increases to the internal reference reference voltage that limits close to circuit gradually, constant current pressure limiting charger restriction charging voltage continues to increase, with constant relatively voltage (generally equal or close to the internal reference reference voltage) to charge in batteries, charging current then reduces (but being not less than the charging trickle) gradually, until accumulator electric-quantity is full of.The internal structure of constant current pressure limiting charger mainly is made of power input interface circuit, constant current pressure limiting charging control circuit, charging output interface circuit and output current detection circuit, output voltage detecting circuit, current error comparator and voltage error comparator.As shown in Figure 1, power input interface circuit, constant current pressure limiting charging control circuit and charging output interface circuit are connected successively, and wherein, the power input interface circuit is used for connecting the input power supply, and the charging output interface circuit is used for connecting storage batteries.The test side of output current detection circuit is connected between constant current pressure limiting charging control circuit and the charging output interface circuit, the test side of output voltage detecting circuit then is connected with the charging output interface circuit, the two is used for detecting respectively charging current and the charging voltage of output, and the signal output part of output current detection circuit and the signal output part of output voltage detecting circuit are connected to the comparison input of current error comparator and the comparison input of voltage error comparator respectively, are used for the charging current of the output that will detect and charging voltage is sent to the current error comparator respectively and the voltage error comparator compares.The internal reference reference current that the benchmark input end connection of current error comparator presets is (as " I among Fig. 1
0" shown in), be used for will output charging current and internal reference reference current compare, the benchmark input end of voltage error comparator then connects the internal reference reference voltage that presets (as " V among Fig. 1
0" shown in); be used for charging voltage and the internal reference reference voltage of output are compared; the comparison signal output of current error comparator and the comparison signal output of voltage error comparator are connected to the control parameter input of constant current pressure limiting charging control circuit respectively, are used for electric current comparison signal and voltage comparison signal are sent to constant current pressure limiting charging control circuit respectively.Constant current pressure limiting charging control circuit then carries out the control of constant current pressure limiting charging process according to electric current comparison signal and voltage comparison signal; Be specially: when charging voltage and the internal reference reference voltage of output differ big (showing that battery tension is lower), constant current pressure limiting charging control circuit then by the internal reference reference current value export constant charging current to the output interface circuit that charges to charge in batteries; When the charging voltage of output increases to close to the internal reference reference voltage gradually (showing that battery tension is close to the internal reference reference voltage), constant current pressure limiting charging control circuit is then controlled with constant voltage (generally equal or close to the internal reference reference voltage) to charging output interface output charging current, and the control charging current reduces (but be not less than charging trickle) gradually, until accumulator electric-quantity is full of.Thus, realized that above-mentioned constant current pressure limiting fills process.Than constant current charger and constant voltage charger, the advantage of constant current pressure limiting charger is, can guarantee charging rate efficiently, can guarantee again under the prerequisite that at utmost reduces the life of storage battery influence accumulator electric-quantity to be full of, and therefore uses more extensive.
But existing constant current pressure limiting charger still exists deficiency.Charging principle by constant current pressure limiting charger can be known, have only when the power output of constant current pressure limiting charger input power supply during greater than the initial charge power (being the product of internal reference reference current and storage battery initial voltage) of constant current pressure limiting charger, storage battery just begins to be recharged; Arrived the charging later stage of storage battery, when internal reference reference voltage that battery tension limits near circuit, have only after the maximum charge power (be the product of internal reference reference current and internal reference reference voltage) of power output greater than constant current pressure limiting charger of input power supply, just can enter charging voltage more constant (generally equal or close to the internal reference reference voltage), charging current and reduce the charging process of (but being not less than the charging trickle) gradually, storage battery is full of; And before the internal reference reference voltage that battery tension limits near circuit, when the voltage of storage battery begins to increase along with charging process, if when the power output of input power supply does not reach instant charge power (being the product of the instant voltage of internal reference reference current and storage battery), then can't effectively charge to storage battery.Under this condition, if adopt power outputs such as solar panel, hand generator and inconstant power-supply device as the input power supply of constant current pressure limiting charger, do not reach the situation of technology charge power with regard to the power output that is easy to occur to import power supply, cause the waste of the power supply energy, this has just limited the application of constant current pressure limiting charger on the inconstant working power of some power outputs.
The utility model content
At above shortcomings in the prior art, the purpose of this utility model is to provide a kind of variable constant current pressure limiting charger, the energy waste that is caused when reduce adopting the inconstant power-supply device of power output as the input power supply of constant current pressure limiting charger solves the problem that the application of constant current pressure limiting charger on the inconstant working power of power output is restricted.
For achieving the above object, the utility model has adopted following technological means:
A kind of variable constant current pressure limiting charger comprises power input interface circuit, constant current pressure limiting charging control circuit, charging output interface circuit, output current detection circuit, output voltage detecting circuit, current error comparator and voltage error comparator; Also comprise input power testing circuit and reference electric current conversion module;
Described power input interface circuit, constant current pressure limiting charging control circuit and charging output interface circuit are connected successively, and the power input interface circuit is used for connecting the input power supply, and the charging output interface circuit is used for connecting storage batteries;
The test side of described output current detection circuit is connected between constant current pressure limiting charging control circuit and the charging output interface circuit, the signal output part of output current detection circuit is connected to the comparison input of current error comparator, for detection of the charging current of output and be sent to the current error comparator and compare;
The test side of described output voltage detecting circuit is connected with the charging output interface circuit, the signal output part of output voltage detecting circuit is connected to the comparison input of voltage error comparator, for detection of the charging voltage of output and be sent to the voltage error comparator and compare;
The test side of described input power testing circuit is connected with the power input interface circuit, the signal output part of input power testing circuit is connected to the data input pin of reference electric current conversion module, for detection of the input power supply power and be sent to reference electric current conversion module;
Described reference electric current conversion module is the logical operation functional module that is preset with charge power/electric current conversion scale, and the data output end of reference electric current conversion module is connected to the benchmark input end of current error comparator, be used for according to described charge power/electric current conversion scale, power conversion according to the input power supply obtains the reference current signal of corresponding proportion, and transfers to the benchmark input end of current error comparator;
The comparison signal output of described current error comparator is connected to the control parameter input of constant current pressure limiting charging control circuit, be used for charging current and the reference electric current of output are compared, and the electric current comparison signal that relatively obtains is sent to constant current pressure limiting charging control circuit;
The benchmark input end of described voltage error comparator connects the internal reference reference voltage that presets, the comparison signal output of voltage error comparator is connected to the control parameter input of constant current pressure limiting charging control circuit, the charging voltage and the internal reference reference voltage that are used for just output compare, and the voltage comparison signal that relatively obtains is sent to constant current pressure limiting charging control circuit;
Described constant current pressure limiting charging control circuit then carries out the control of constant current pressure limiting charging process according to electric current comparison signal and voltage comparison signal.
Than prior art, the utlity model has following beneficial effect:
1, in the utility model variable constant current pressure limiting charger, owing to adopted unique reference electric current interlock circuit structure, on the basis of existing constant current pressure limiting charger, input power testing circuit and reference electric current conversion module have been set up, detect the power of input power supply and be sent to reference electric current conversion module by the input power testing circuit, by reference electric current conversion module according to default charge power/electric current conversion scale, obtain the reference current signal of corresponding proportion according to the power conversion of input power supply, the benchmark input end of current error comparator then no longer is to be connected and fixed constant internal reference reference current, but connect by the reference current signal of reference electric current conversion module according to the power conversion output of input power supply, therefore the reference current signal is variable with the power of input power supply, thus, just significantly expanded the power domain of walker that the input power supply can effectively charge to storage battery, even if employing solar panel, power outputs such as hand generator and inconstant power-supply device are as the input power supply, also can significantly reduce the energy waste that causes because power is non-constant, solve the problem that the application of constant current pressure limiting charger on the inconstant working power of power output is restricted.
2, variable constant current pressure limiting charger of the present utility model adopts the circuit structure module to be circuit unit or commercial product ripe in the prior art, to those skilled in the art, its realization technology is very simple, can be applied to industrialization design and production very soon.
Description of drawings
Fig. 1 is the structural representation of constant current pressure limiting charger in the prior art;
Fig. 2 is the structural representation of the utility model variable constant current pressure limiting charger.
Embodiment
Below in conjunction with drawings and Examples the technical solution of the utility model is described further.
The utility model provides a kind of variable constant current pressure limiting charger, as shown in Figure 2.Compare with constant current pressure limiting charger of the prior art, variable constant current pressure limiting charger of the present utility model also comprises power input interface circuit, constant current pressure limiting charging control circuit, charging output interface circuit, output current detection circuit, output voltage detecting circuit, current error comparator and voltage error comparator; But special feature is, also includes input power testing circuit and reference electric current conversion module in the variable constant current pressure limiting charger of the present utility model.In variable constant current pressure limiting charger of the present utility model, power input interface circuit, constant current pressure limiting charging control circuit and charging output interface circuit are connected successively, the power input interface circuit is used for connecting the input power supply, and the charging output interface circuit is used for connecting storage batteries; The test side of output current detection circuit is connected between constant current pressure limiting charging control circuit and the charging output interface circuit, the signal output part of output current detection circuit is connected to the comparison input of current error comparator, for detection of the charging current of output and be sent to the current error comparator and compare; The test side of output voltage detecting circuit is connected with the charging output interface circuit, the signal output part of output voltage detecting circuit is connected to the comparison input of voltage error comparator, for detection of the charging voltage of output and be sent to the voltage error comparator and compare; The test side of input power testing circuit is connected with the power input interface circuit, the signal output part of input power testing circuit is connected to the data input pin of reference electric current conversion module, for detection of the input power supply power and be sent to reference electric current conversion module; Reference electric current conversion module is the logical operation functional module that is preset with charge power/electric current conversion scale, and the data output end of reference electric current conversion module is connected to the benchmark input end of current error comparator, be used for according to described charge power/electric current conversion scale, obtain the reference current signal of corresponding proportion (as " I among Fig. 2 according to the power conversion of importing power supply
0" shown in), and transfer to the benchmark input end of current error comparator; The comparison signal output of current error comparator is connected to the control parameter input of constant current pressure limiting charging control circuit, be used for charging current and the reference electric current of output are compared, and the electric current comparison signal that relatively obtains is sent to constant current pressure limiting charging control circuit; The internal reference reference voltage that the benchmark input end connection of voltage error comparator presets is (as " V among Fig. 2
0" shown in); the comparison signal output of voltage error comparator is connected to the control parameter input of constant current pressure limiting charging control circuit; the charging voltage and the internal reference reference voltage that are used for just output compare, and the voltage comparison signal that relatively obtains is sent to constant current pressure limiting charging control circuit; Constant current pressure limiting charging control circuit then carries out the control of constant current pressure limiting charging process according to electric current comparison signal and voltage comparison signal.
Compare with the constant current pressure limiting charger of prior art, still adopted constant current pressure limiting charging control circuit in the utility model variable constant current pressure limiting charger, therefore its charging control process has still been continued to use existing constant current pressure limiting and has been filled principle, namely when battery tension is low, to charge in batteries, the charging current in this stage is constant, charging voltage becomes greatly (but being not more than the internal reference reference voltage) gradually with constant current (being the reference electric current) for constant current pressure limiting charging control circuit; Along with charging process is carried out, when battery tension increases to close to the internal reference reference voltage gradually, the charging voltage that then limits constant current pressure limiting charging control circuit continues to increase, with constant relatively voltage (generally equal or close to the internal reference reference voltage) to charge in batteries, charging current then reduces (but being not less than the charging trickle) gradually, until accumulator electric-quantity is full of.But, describe and to see by said structure, though all be to realize constant current pressure limiting charging control, the interlock circuit structure to the reference electric current in the utility model variable constant current pressure limiting charger arranges, be with prior art in the maximum difference of common constant current pressure limiting charger.In the prior art constant current pressure limiting charger, the benchmark input end of current error comparator connects the internal reference reference current that presets, the size of its internal reference reference current value immobilizes, having limited constant current pressure limiting charger output power of power supply of (be battery tension near the internal reference reference voltage before) in the early stage charging process must could effectively charge to storage battery greater than instant charge power (being the product of the instant voltage of internal reference reference current and storage battery), otherwise output power of power supply just has been wasted.Yet, in variable constant current pressure limiting charger of the present utility model, input power testing circuit and reference electric current conversion module have been set up, detect the power of input power supply and be sent to reference electric current conversion module by the input power testing circuit, by reference electric current conversion module according to default charge power/electric current conversion scale, obtain the reference current signal of corresponding proportion according to the power conversion of input power supply, the benchmark input end of current error comparator then no longer is to be connected and fixed constant internal reference reference current, but connect by the reference current signal of reference electric current conversion module according to the power conversion output of input power supply, so the reference current signal is variable with the power of input power supply; When the power of importing power supply is big, the reference current signal that the conversion of reference electric current conversion module obtains is corresponding bigger, control circuit is filled in the constant current pressure limiting, and then to control charging current constant on bigger reference current value, and storage battery is charged fast; When importing the power reduction of power supply, the reference current value then can't remain on original higher value, cause importing power not reach original bigger instant charge power (being the product of the instant voltage of original bigger reference electric current and storage battery) and hinder storage battery is effectively charged, reference electric current conversion module can convert according to the input power that reduces, thereby corresponding proportion ground reduces the reference current value, make constant current pressure limiting charging control circuit control charging current constant on the reference current value of smaller value, storage battery is charged, though this moment, charging rate can slow down accordingly, the power that can not cause importing power supply is wasted; Unless the power of input power supply is less than minimum instant charge power (product of the instant voltage of namely charge trickle and storage battery), just can cause and can't charge to storage battery this moment.This shows, the utility model variable constant current pressure limiting charger, its reference electric current is corresponding variable with the watt level of input power supply, significantly expanded the power domain of walker that the input power supply can effectively charge to storage battery, even if adopt power outputs such as solar panel, hand generator and inconstant power-supply device as the input power supply, also can significantly reduce the energy waste that causes because power is non-constant, solve the problem that the application of constant current pressure limiting charger on the inconstant working power of power output is restricted.
In variable constant current pressure limiting charger of the present utility model, power input interface circuit, constant current pressure limiting charging control circuit, charging output interface circuit, output current detection circuit, output voltage detecting circuit, current error comparator, voltage error comparator, input power testing circuit etc. are circuit unit or commercial product ripe in the prior art; And for reference electric current conversion module, those skilled in the art can adopt logical operation functional modules such as programmable logic device, single-chip microcomputer, arm processor, the computing that simply converts programming is achieved, and himself realizes also belonging to existing mature technology; Therefore to those skilled in the art, the realization technology of variable constant current pressure limiting charger of the present utility model is very simple, can be applied to industrialization design and production very soon.During concrete the application, obtain the concrete conversion mode of the reference current signal of corresponding proportion in the reference electric current conversion module according to the power conversion of input power supply, those skilled in the art can adjust according to different concrete applied environments; For example, if the reference electric current is I
0, the power of input power supply is W
In, charge power/electric current conversion scale is k, then reference electric current conversion mode can be designed to I
0=k * W
InAgain for example, on the basis of aforementioned reference electric current conversion mode, can also set up electric current maximum threshold I
Max, if k * W
InValue surpass electric current maximum threshold I
Max, then with I
0=k * W
InIf the output reference reference current signal is k * W
InValue surpassed electric current maximum threshold I
Max, then with I
0=I
MaxThe output reference reference current signal, etc.Certainly, be not difficult to find out from the charging principle of battery charger, in the utility model variable constant current pressure limiting charger, the value size of charge power/electric current conversion scale that reference electric current conversion module is default, need determine according to practical application experience or according to the impedance analysis result to whole charging circuit, after guaranteeing that reference electric current conversion module is according to this charge power/definite reference electric current of electric current conversion scale conversion, constant current pressure limiting charging control circuit will import that power is changed and when with constant reference electric current storage battery being charged, its charging voltage should be greater than the instant voltage of storage battery, thus carrying out smoothly of guaranteeing to charge.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although have been described in detail with reference to the utility model of embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (1)
1. a variable constant current pressure limiting charger comprises power input interface circuit, constant current pressure limiting charging control circuit, charging output interface circuit, output current detection circuit, output voltage detecting circuit, current error comparator and voltage error comparator; It is characterized in that, also comprise input power testing circuit and reference electric current conversion module;
Described power input interface circuit, constant current pressure limiting charging control circuit and charging output interface circuit are connected successively, and the power input interface circuit is used for connecting the input power supply, and the charging output interface circuit is used for connecting storage batteries;
The test side of described output current detection circuit is connected between constant current pressure limiting charging control circuit and the charging output interface circuit, the signal output part of output current detection circuit is connected to the comparison input of current error comparator, for detection of the charging current of output and be sent to the current error comparator and compare;
The test side of described output voltage detecting circuit is connected with the charging output interface circuit, the signal output part of output voltage detecting circuit is connected to the comparison input of voltage error comparator, for detection of the charging voltage of output and be sent to the voltage error comparator and compare;
The test side of described input power testing circuit is connected with the power input interface circuit, the signal output part of input power testing circuit is connected to the data input pin of reference electric current conversion module, for detection of the input power supply power and be sent to reference electric current conversion module;
Described reference electric current conversion module is the logical operation functional module that is preset with charge power/electric current conversion scale, and the data output end of reference electric current conversion module is connected to the benchmark input end of current error comparator, be used for according to described charge power/electric current conversion scale, power conversion according to the input power supply obtains the reference current signal of corresponding proportion, and transfers to the benchmark input end of current error comparator;
The comparison signal output of described current error comparator is connected to the control parameter input of constant current pressure limiting charging control circuit, be used for charging current and the reference electric current of output are compared, and the electric current comparison signal that relatively obtains is sent to constant current pressure limiting charging control circuit;
The benchmark input end of described voltage error comparator connects the internal reference reference voltage that presets, the comparison signal output of voltage error comparator is connected to the control parameter input of constant current pressure limiting charging control circuit, the charging voltage and the internal reference reference voltage that are used for just output compare, and the voltage comparison signal that relatively obtains is sent to constant current pressure limiting charging control circuit;
Described constant current pressure limiting charging control circuit then carries out the control of constant current pressure limiting charging process according to electric current comparison signal and voltage comparison signal.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319849A (en) * | 2014-11-06 | 2015-01-28 | 重庆希诺达通信有限公司 | Solar battery charging controller and charging control method |
| CN104467135A (en) * | 2014-12-31 | 2015-03-25 | 展讯通信（上海）有限公司 | Charging method and device of equipment to be charged, equipment to be charged and charging system |
| CN104467120A (en) * | 2014-12-31 | 2015-03-25 | 展讯通信（上海）有限公司 | Equipment to be charged, charging method and device of equipment to be charged, electronic equipment and charging system |
| CN104852417A (en) * | 2014-12-05 | 2015-08-19 | 重庆希诺达通信有限公司 | Portable multifunctional charger |
| WO2017197567A1 (en) * | 2016-05-16 | 2017-11-23 | 华为技术有限公司 | Remote power supply system circuit control method, apparatus, remote power supply and system |
| CN109995114A (en) * | 2019-04-17 | 2019-07-09 | 南京矽力杰半导体技术有限公司 | Adaptive charging circuit and charging method |
| CN111384733A (en) * | 2018-12-28 | 2020-07-07 | 中惠创智无线供电技术有限公司 | Charging device with adjustable charging current |
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2013
- 2013-05-15 CN CN 201320263833 patent/CN203218953U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319849A (en) * | 2014-11-06 | 2015-01-28 | 重庆希诺达通信有限公司 | Solar battery charging controller and charging control method |
| CN104852417A (en) * | 2014-12-05 | 2015-08-19 | 重庆希诺达通信有限公司 | Portable multifunctional charger |
| CN104852417B (en) * | 2014-12-05 | 2017-02-22 | 重庆希诺达通信有限公司 | Portable multifunctional charger |
| CN104467135A (en) * | 2014-12-31 | 2015-03-25 | 展讯通信（上海）有限公司 | Charging method and device of equipment to be charged, equipment to be charged and charging system |
| CN104467120A (en) * | 2014-12-31 | 2015-03-25 | 展讯通信（上海）有限公司 | Equipment to be charged, charging method and device of equipment to be charged, electronic equipment and charging system |
| CN104467120B (en) * | 2014-12-31 | 2017-06-16 | 展讯通信（上海）有限公司 | Charging equipment and its charging method, device, electronic equipment and charging system |
| CN104467135B (en) * | 2014-12-31 | 2017-06-30 | 展讯通信（上海）有限公司 | The charging method of charging equipment, device, charging equipment and charging system |
| WO2017197567A1 (en) * | 2016-05-16 | 2017-11-23 | 华为技术有限公司 | Remote power supply system circuit control method, apparatus, remote power supply and system |
| CN111384733A (en) * | 2018-12-28 | 2020-07-07 | 中惠创智无线供电技术有限公司 | Charging device with adjustable charging current |
| CN109995114A (en) * | 2019-04-17 | 2019-07-09 | 南京矽力杰半导体技术有限公司 | Adaptive charging circuit and charging method |
| CN109995114B (en) * | 2019-04-17 | 2023-09-01 | 南京矽力微电子技术有限公司 | Self-adaptive charging circuit and charging method |
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