CN207368712U - A kind of battery charger with temperature negative-feedback - Google Patents
A kind of battery charger with temperature negative-feedback Download PDFInfo
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- CN207368712U CN207368712U CN201721496152.0U CN201721496152U CN207368712U CN 207368712 U CN207368712 U CN 207368712U CN 201721496152 U CN201721496152 U CN 201721496152U CN 207368712 U CN207368712 U CN 207368712U
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Abstract
The utility model discloses a kind of battery charger with temperature negative-feedback, including for changing the current adjustment unit for reducing or improving charging current and the voltage output unit for exporting second voltage according to the charging voltage of input according to real time temperature, the current adjustment unit connects the voltage output unit.The utility model adjusts the size of output voltage by current adjustment unit in real time at different temperatures, at high temperature, reduce output voltage, floating current when further reduction battery is fully charged, output voltage is improved in low temperature, further raises floating current of battery when being full of, improves that low temperature floating current is less than normal and high-temperature floating-charge electric current situation bigger than normal, ensure charging normal for battery, and cost is relatively low.
Description
Technical field
Charging technique field is the utility model is related to, more particularly to a kind of battery charger with temperature negative-feedback.
Background technology
With the development of illumination market, emergency lighting is used with rechargeable battery in various environment, the Charge Management of battery
It is a critically important problem.When common nickel-hydrogen nickel-cadmium battery is charged under low temperature environment and hot environment, battery fills
Full attainable upper voltage limit value has very big difference.
As shown in Figure 1, existing frequently-used battery charger is charged by the pressure difference of product and battery, charging electricity
The output voltage on road is fed back by optocoupler+TL431, as can be seen from Figure 1 output voltage Vc1=(R3+ of Switching Power Supply
R4)/R4 × 2.5V, wherein, output voltage Vc1 that is to say the voltage on capacitance C1, and 2.5V is three end adjustable shunt reference source S
（Model TL431）Internal 2.5V reference voltages, which, which varies with temperature, is basically unchanged, and the charging current I of battery=
（Vc1-Vbattery）/ R5, and the upper voltage limit value of battery is different at different temperatures, i.e. the maximum of Vbattery is not
Synthermal lower difference, can so cause the floating current deviation after battery is full of under different temperatures environment to increase.Particularly high temperature
In the case of easily there is the excessive situation of floating current, easily occur the situation of undercharge under low temperature condition.
Thus the prior art could be improved and improve.
Utility model content
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide one kind to have temperature negative-feedback
Battery charger, easily to occur in the case of a high temperature when solving current battery charging, floating current is excessive, low temperature condition
Easily there is the problem of undercharge down.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of battery charger with temperature negative-feedback, it includes：
For changing the current adjustment unit for reducing or improving floating current according to real time temperature；
For exporting the voltage output unit of second voltage according to input charging voltage；
The current adjustment unit connects the voltage output unit.
In the battery charger with temperature negative-feedback, the voltage output unit includes switch control mould
Block, first resistor, second resistance, the first capacitance, the first diode, transformer, metal-oxide-semiconductor, shunt reference source and optocoupler, the change
2nd foot of depressor connects the switch control module, and the 1st foot of the transformer connects the drain electrode of metal-oxide-semiconductor, the metal-oxide-semiconductor
Source electrode is grounded, the grid connecting valve control module of the metal-oxide-semiconductor, and the 4th foot of the transformer is connecting the first diode just
Pole, the anode of first diode connect one end of the first capacitance, one end of second resistance and current adjustment unit, the change
3rd foot of depressor and the other end of the first capacitance are grounded, the 1st foot of the other end connection optocoupler of the second resistance, described
2nd foot of optocoupler connects one end of the second capacitance and the cathode of shunt reference source, and the 3rd foot of the optocoupler and the 4th foot are all connected with
Switch control module, the other end of second capacitance connects the control pole of shunt reference source by first resistor and electric current adjusts
Unit, the plus earth of the shunt reference source.
In the battery charger with temperature negative-feedback, the current adjustment unit includes 3rd resistor, the
Four resistance, the 5th resistance and Diode series group, the cathode of one end connection battery of the 5th resistance, the 5th resistance
The other end connects the anode of the first diode and the cathode of Diode series group, the anode connection the 3rd of the Diode series group
One end of resistance, the other end of the 3rd resistor connect one end of the 4th resistance and the control pole of shunt reference source, also by
First resistor connects the other end of the second capacitance, the other end ground connection of the 4th resistance.
In the battery charger with temperature negative-feedback, the Diode series group includes at least one two pole
Pipe.
Compared to the prior art, the battery charger provided by the utility model with temperature negative-feedback, including for
Change the current adjustment unit that reduces or improve charging current according to real time temperature and for according to input charging voltage output the
The voltage output unit of two voltages, the current adjustment unit connect the voltage output unit.The utility model passes through electric current
Adjustment unit adjusts the size of output voltage in real time at different temperatures, at high temperature, reduces output voltage, further reduces electricity
Floating current when pond is fully charged, in low temperature, improves output voltage, further raises floating current when battery is full of, change
It has been apt to that low temperature floating current is less than normal and high-temperature floating-charge electric current situation bigger than normal, has ensured charging normal for battery, and cost is relatively low.
Brief description of the drawings
Fig. 1 is the circuit diagram of existing battery charger.
Fig. 2 is the principle of the preferred embodiment of the battery charger provided by the utility model with temperature negative-feedback
Figure.
Embodiment
The utility model provides a kind of battery charger with temperature negative-feedback, for make the purpose of this utility model,
Technical solution and effect are clearer, clear and definite, and the utility model is further described in the embodiment that develops simultaneously referring to the drawings.
It should be appreciated that specific embodiment described herein is not used to limit the utility model only to explain the utility model.
Referring to Fig. 2, the utility model provides the battery charger with temperature negative-feedback, in low temperature condition
Under, the floating current after raising battery is fully charged, in the case of a high temperature, the floating current after reduction battery is fully charged, it includes
Current adjustment unit 100 and voltage output unit 200, the current adjustment unit 100 connect the voltage output unit 200.
Current adjustment unit 100, which is used to be changed according to real time temperature, to be reduced or improves floating current, and voltage output unit 200 is used for basis
The charging voltage output second voltage of input, in temperature change, current adjustment unit 100 changes voltage output unit 200
The second voltage of output, so as to further reduce or improve floating current.
Specifically, the voltage output unit 200 includes switch control module, first resistor R1, second resistance R2, the
One capacitance C1, the first diode D1, transformer L1, metal-oxide-semiconductor Q1, the of shunt reference source S1 and optocoupler IC1, the transformer L1
2 feet connect the switch control module, the drain electrode of the 1st foot connection metal-oxide-semiconductor Q1 of the transformer L1, the source of the metal-oxide-semiconductor Q1
Pole is grounded, the grid connecting valve control module of the metal-oxide-semiconductor Q1, and the 4th foot of the transformer L1 connects the first diode D1
Cathode, the anode of the first diode D1 connects one end of the first capacitance C1, one end of second resistance R2 and electric current adjustment
Unit 100, the 3rd foot of the transformer L1 and the other end of the first capacitance C1 are grounded, the other end of the second resistance R2
The 1st foot of optocoupler IC1 is connected, the 2nd foot of the optocoupler IC1 connects one end of the second capacitance C2 and the moon of shunt reference source S1
Pole, the 3rd foot and the 4th foot of the optocoupler IC1 are all connected with switch control module, and the other end of the second capacitance C2 passes through first
The control pole and current adjustment unit 100 of resistance R1 connection shunt reference sources S1, the plus earth of the shunt reference source S1.
It is to be appreciated that the switch control module is the prior art.The utility model is existing to voltage output unit 200
Some operation principles are not described further, after emphasis explaination increase current adjustment unit 100, the operation principle of voltage output unit 200.
Please continue to refer to Fig. 2, the current adjustment unit include 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and
The cathode of one end connection battery BAT of Diode series group Da, the 5th resistance R5, the other end of the 5th resistance R5 connect
Connect the anode of the first diode D1 and the cathode of Diode series group Da, the 3rd electricity of anode connection of the Diode series group Da
One end of resistance R3, one end of the 4th resistance R4 of other end connection of the 3rd resistor R3 and the control pole of shunt reference source S1,
Also by the other end of first resistor R1 the second capacitances of connection C2, the other end of the 4th resistance R4 is grounded.
Specifically, the battery charger provided by the utility model with temperature negative-feedback is on the basis of original circuit
One Diode series group Da of upper increase, the Diode series group Da includes at least one diode, more in battery particle
When, the quantity of diode can be increased, larger range of change floating current, comes new to this practicality by taking a diode as an example below
The technical solution of type elaborates.
When temperature raises, the forward voltage drop of diode reduces, i.e. the pressure drop reduction of A points, often increases by 1 DEG C, two poles in Fig. 2
The forward voltage drop of pipe about reduces 2mv, that is, has negative temperature coefficient.In use, single in 50 DEG C of a temperature range
The VF of diode at high temperature than low temperature when about low 0.1V.The voltage change of output of products 0.1V, i.e., the change of corresponding electric current
Scope is about 0.1/R5, that is to say, that after increasing the diode, under low temperature condition, product floating voltage improves, battery during low temperature
Floating current rise after fully charged；Under high-temperature condition, product floating voltage declines, floating current after battery is fully charged during high temperature
Reduce, improve the floating current difference after battery in the case of high/low temperature is full of, and improved circuit only increases diode
Device, it is relatively low to the cost impact of circuit.
In a further embodiment, since the knots modification of single diode pair voltage is less, thus cell voltage compared with
Gao Shi, can achieve the purpose that adjustment floating current, improvement in real time is electric in the case of high/low temperature by increasing the quantity of diode
The Charge Management in pond.
In conclusion the battery charger provided by the utility model with temperature negative-feedback, including for according to reality
When temperature change reduce or improve charging current current adjustment unit and for according to the charging voltage of input output second electricity
The voltage output unit of pressure, the current adjustment unit connect the voltage output unit.The utility model is adjusted by electric current
Unit adjusts the size of output voltage in real time at different temperatures, at high temperature, reduces output voltage, further reduces battery and fill
Floating current during full electricity, output voltage is improved in low temperature, is further raised floating current when battery is full of, is improved low
Warm floating current is less than normal and high-temperature floating-charge electric current situation bigger than normal, ensures charging normal for battery, and cost is relatively low.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (4)
- A kind of 1. battery charger with temperature negative-feedback, it is characterised in that including：For changing the current adjustment unit for reducing or improving floating current according to real time temperature；For exporting the voltage output unit of second voltage according to the charging voltage of input；The current adjustment unit connects the voltage output unit.
- 2. the battery charger according to claim 1 with temperature negative-feedback, it is characterised in that the voltage output Unit includes switch control module, first resistor, second resistance, the first capacitance, the first diode, transformer, metal-oxide-semiconductor, shunting A reference source and optocoupler, the 2nd foot of the transformer connect the switch control module, the 1st foot connection metal-oxide-semiconductor of the transformer Drain electrode, the metal-oxide-semiconductor source electrode ground connection, the grid connecting valve control module of the metal-oxide-semiconductor, the 4th foot of the transformer Connect the cathode of the first diode, the anode of first diode connect one end of the first capacitance, second resistance one end and Current adjustment unit, the 3rd foot of the transformer and the other end of the first capacitance are grounded, and the other end of the second resistance connects The 1st foot of optocoupler is connect, the 2nd foot of the optocoupler connects one end of the second capacitance and the cathode of shunt reference source, the optocoupler 3rd foot and the 4th foot are all connected with switch control module, and the other end of second capacitance connects shunt reference source by first resistor Control pole and current adjustment unit, the plus earth of the shunt reference source.
- 3. the battery charger according to claim 2 with temperature negative-feedback, it is characterised in that the electric current adjustment Unit includes 3rd resistor, the 4th resistance, the 5th resistance and Diode series group, one end connection battery of the 5th resistance Cathode, the other end of the 5th resistance connect the anode of the first diode and the cathode of Diode series group, the diode One end of the anode connection 3rd resistor of series connection group, the other end of the 3rd resistor connect one end and the shunting base of the 4th resistance The control pole in quasi- source, the other end also by first resistor the second capacitance of connection, the other end ground connection of the 4th resistance.
- 4. the battery charger according to claim 3 with temperature negative-feedback, it is characterised in that the diode string Connection group includes at least one diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721496152.0U CN207368712U (en) | 2017-11-10 | 2017-11-10 | A kind of battery charger with temperature negative-feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721496152.0U CN207368712U (en) | 2017-11-10 | 2017-11-10 | A kind of battery charger with temperature negative-feedback |
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| Publication Number | Publication Date |
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| CN207368712U true CN207368712U (en) | 2018-05-15 |
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| CN201721496152.0U Active CN207368712U (en) | 2017-11-10 | 2017-11-10 | A kind of battery charger with temperature negative-feedback |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103768A (en) * | 2019-04-23 | 2019-08-09 | 浙江合众新能源汽车有限公司 | A kind of electric car mends method for electrically and device automatically |
| CN112086700A (en) * | 2020-09-17 | 2020-12-15 | 张志军 | Method and device for dynamically adjusting float charge current of lead-acid storage battery and computer equipment |
-
2017
- 2017-11-10 CN CN201721496152.0U patent/CN207368712U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103768A (en) * | 2019-04-23 | 2019-08-09 | 浙江合众新能源汽车有限公司 | A kind of electric car mends method for electrically and device automatically |
| CN112086700A (en) * | 2020-09-17 | 2020-12-15 | 张志军 | Method and device for dynamically adjusting float charge current of lead-acid storage battery and computer equipment |
| CN112086700B (en) * | 2020-09-17 | 2022-06-28 | 张志军 | Method, device and computer equipment for dynamically regulating floating charge current of lead-acid storage battery |
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