CN208608762U - Lead-acid battery low-voltage charging unit and charger - Google Patents
Lead-acid battery low-voltage charging unit and charger Download PDFInfo
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- CN208608762U CN208608762U CN201821411226.0U CN201821411226U CN208608762U CN 208608762 U CN208608762 U CN 208608762U CN 201821411226 U CN201821411226 U CN 201821411226U CN 208608762 U CN208608762 U CN 208608762U
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Abstract
The utility model provides lead-acid battery low-voltage charging unit and charger, which includes charging control circuit and single-chip microcontroller, and charging control circuit includes field-effect tube, and field-effect tube includes metal-oxide-semiconductor and double metal-oxide-semiconductors；In the case where single-chip microcontroller acquires the first cell voltage of the first battery, if the first cell voltage is lower than the first predeterminated voltage, single-chip microcontroller output pulse width modulation (PWM) signal, the grid for controlling metal-oxide-semiconductor charges to the first battery；If the first cell voltage is higher than the first predeterminated voltage, single-chip microcontroller stops output pwm signal；If the second cell voltage is lower than the second predeterminated voltage, single-chip microcontroller exports pulse pwm signal, and the grid for controlling double metal-oxide-semiconductors charges to the second battery；If the second cell voltage is higher than the second predeterminated voltage, single-chip microcontroller stops output pwm signal.By this way, the battery not powered on can be filled to low-voltage to charge, to improve the utilization rate of battery, reduce waste.
Description
Technical field
The utility model relates to charging technique fields, more particularly, to lead-acid battery low pressure charging unit and charger.
Background technique
As lead-acid battery is using more and more extensive, people in use, due to being short in understanding to lead-acid battery, very
Be easy to cause over-discharge, over-discharge be to the damage of battery it is very big, many times when user has found battery over-discharge, the electricity of battery
Pressure is as low as 2-3V, and when people are charged with charger, discovery, which is filled, not to be powered on.This when, battery was in many cases in fact
It can restore function, but many times charger does not support 2-3V low pressure to charge, this results in huge wastes.
Utility model content
In view of this, being controlled low the purpose of this utility model is to provide lead-acid battery low pressure charging unit and charger
Voltage battery charging, to improve the utilization rate of battery.
In a first aspect, the embodiment of the invention provides lead-acid battery low-voltage charging unit, including charging control circuit and
Single-chip microcontroller, charging control circuit include field-effect tube, and field-effect tube includes metal-oxide-semiconductor and double metal-oxide-semiconductors, and single-chip microcontroller and charge control are electric
Road connection；In the case where single-chip microcontroller acquires the first cell voltage of the first battery, if the first cell voltage is pre- lower than first
If voltage, then single-chip microcontroller output pulse width modulation (PWM) signal, the grid for controlling metal-oxide-semiconductor charge to the first battery；If
First cell voltage is higher than the first predeterminated voltage, then single-chip microcontroller stops output pwm signal；The of the second battery is acquired in single-chip microcontroller
In the case where two cell voltages, if the second cell voltage is lower than the second predeterminated voltage, single-chip microcontroller exports pulse pwm signal,
The grid for controlling double metal-oxide-semiconductors charges to the second battery；If the second cell voltage is higher than the second predeterminated voltage, single-chip microcontroller
Stop output pwm signal.
Further, charging control circuit further includes diode D1；In charging control circuit, one end of resistance R10 is defeated
Enter pwm signal；The other end of resistance R10 is connect with the base stage of triode Q2；The emitter of triode Q2 is connect with ground wire；Three poles
The collector of pipe Q2 is connect with one end of resistance R2；The other end of resistance R2 grid with one end of resistance R1 and metal-oxide-semiconductor Q1 respectively
Pole connection；The anode of capacitor E1 is connect with the source electrode of the other end of resistance R1 and metal-oxide-semiconductor Q1；The cathode and ground wire of capacitor E1 connects
It connects；The drain electrode of metal-oxide-semiconductor Q1 is connect with the anode of diode D1；The cathode of diode D1 is connect with the anode of the first battery；First
The cathode of battery is connect with the emitter of triode Q2.
Further, double metal-oxide-semiconductors include metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4；In charging control circuit, one end of resistance R10 is defeated
Enter pwm signal；The other end of resistance R10 is connect with the base stage of triode Q2；The emitter of triode Q2 is connect with ground wire；Three poles
The collector of pipe Q2 is connect with one end of resistance R2；The other end of resistance R2 connects with metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4 and resistance R1 respectively
It connects；The anode of capacitor E1 is connect with the drain electrode of the other end of resistance R1 and metal-oxide-semiconductor Q3；The cathode of capacitor E1 is connect with ground wire；MOS
The source electrode of pipe Q3 is connect with the source electrode of metal-oxide-semiconductor Q4；The drain electrode of metal-oxide-semiconductor Q4 is connect with the anode of the second battery；Second battery is born
Pole is connect with the emitter of triode Q2.
Further, including metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4 include P-channel metal-oxide-semiconductor.
Further, triode Q2 is NPN type triode.
Further, resistance R1, resistance R2 and resistance R10 include fixed carbon resister.
Further, diode D1 includes germanium diode and silicon diode.
Second aspect, the embodiment of the invention provides charger, the lead-acid battery low-voltage including above-mentioned any one is filled
Controller for electric consumption further includes external power.
Further, external power in lead-acid battery low-voltage battery charge controller single-chip microcontroller and capacitor E1 connect；
External power, for providing charge power supply to the first battery and the second battery.
Further, charger is also used to pass through outside in the case where single-chip microcontroller can not identify the voltage of present battery
Signal makes single-chip microcontroller output pwm signal.
The utility model embodiment bring it is following the utility model has the advantages that
The utility model embodiment provides lead-acid battery low-voltage charging unit and charger, which includes charging control
Circuit and single-chip microcontroller processed, charging control circuit include field-effect tube, and field-effect tube includes metal-oxide-semiconductor and double metal-oxide-semiconductors, single-chip microcontroller with fill
Electric control circuit connection；In the case where single-chip microcontroller acquires the first cell voltage of the first battery, if the first cell voltage is low
In the first predeterminated voltage, then single-chip microcontroller output pulse width modulation (PWM) signal, the grid for controlling metal-oxide-semiconductor carry out the first battery
Charging；If the first cell voltage is higher than the first predeterminated voltage, single-chip microcontroller stops output pwm signal；In single-chip microcontroller acquisition the
In the case where second cell voltage of two batteries, if the second cell voltage is lower than the second predeterminated voltage, single-chip microcontroller exports arteries and veins
Pwm signal is rushed, the grid for controlling double metal-oxide-semiconductors charges to the second battery；If the second cell voltage is higher than the second default electricity
Pressure, then single-chip microcontroller stops output pwm signal.By this way, the battery not powered on can be filled to low-voltage to charge, to mention
The utilization rate of high battery reduces waste.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not making the creative labor for those skilled in the art
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the lead-acid battery low pressure charging unit that the utility model embodiment one provides；
Fig. 2 is the structural schematic diagram for the charging control circuit that the utility model embodiment two provides；
Fig. 3 is the structural schematic diagram for another charging control circuit that the utility model embodiment two provides；
Fig. 4 is the structural schematic diagram for the charger that the utility model embodiment three provides.
Icon:
10- single-chip microcontroller；11- control circuit；12- field-effect tube；120-MOS pipe；The bis- metal-oxide-semiconductors of 121-；40- lead-acid battery is low
Voltage battery charge controller；41- external power.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not making creation
Property labour under the premise of every other embodiment obtained, fall within the protection scope of the utility model.
It is all in this way in view of existing low-voltage battery is all to be repaired by returning to genuine by the instrument of profession
The time turned is longer, and many batteries have moved towards very dead by seemingly-dead die；Based on this, the utility model embodiment provides plumbic acid electricity
Pond low-voltage charging unit and charger, control low-voltage battery charging, to improve the utilization rate of battery.
For convenient for understanding the present embodiment, first to lead-acid battery low-voltage disclosed in the utility model embodiment
Charging unit describes in detail.
Embodiment one:
Fig. 1 is the structural schematic diagram of lead-acid battery low pressure charging unit provided by the embodiment of the utility model.
Referring to Fig. 1, which includes charging control circuit 11 and single-chip microcontroller 10, and charging control circuit 11 includes field-effect tube
12, field-effect tube 12 includes metal-oxide-semiconductor 120 and double metal-oxide-semiconductors 121, and single-chip microcontroller 10 is connect with charging control circuit 11；
In the case where single-chip microcontroller 10 acquires the first cell voltage of the first battery, if the first cell voltage is lower than first
Predeterminated voltage, then single-chip microcontroller output PWM (Pulse Width Modulation, pulse width modulation) signal, control MOS are (golden
Belonging to (metal)-oxide (oxide)-semiconductor (semiconductor)) grid of pipe charges to the first battery；Such as
The first cell voltage of fruit is higher than the first predeterminated voltage, then single-chip microcontroller stops output pwm signal；The second battery is acquired in single-chip microcontroller
In the case where second cell voltage, if the second cell voltage is lower than the second predeterminated voltage, single-chip microcontroller exports pulse PWM letter
Number, the grid for controlling double metal-oxide-semiconductors 121 charges to second battery；If the second cell voltage is higher than the second default electricity
Pressure, then single-chip microcontroller stops output pwm signal.
Specifically, battery before charge, can first detect the voltage of battery, can preset two electricity inside single-chip microcontroller 10
Press threshold value, respectively the first predeterminated voltage and the second predeterminated voltage；Lower than the first predeterminated voltage and first is higher than in advance for battery
If voltage is lower than under the second predeterminated voltage both of these case, two different devices are corresponding with for both of these case.For example, working as
When the first predeterminated voltage and the second predeterminated voltage of single-chip microcontroller setting are respectively 3V and 5V, if the electricity to charge required for detecting
When cell voltage is 2V, then cell voltage is lower than the first predeterminated voltage at this time, with regard to the device pair corresponding to the first predeterminated voltage
The battery charges, single-chip microcontroller will output pwm signal, the grid for controlling metal-oxide-semiconductor charges to this battery；Single-chip microcontroller meeting
The battery to charge is detected at any time, if the cell voltage to charge is higher than the first predeterminated voltage 3V, monolithic
Chance stops output pwm signal, this battery can be normally carried out charging.
Specifically, PWM is a kind of analog control mode, according to the variation of respective loads come modulation transistor base stage or
The biasing of metal-oxide-semiconductor grid, the change of Lai Shixian transistor or metal-oxide-semiconductor turn-on time, to realize switching power supply output
Change.This mode can be such that the output voltage of power supply keeps constant in operation conditions change, be the number using microprocessor
A kind of very effective technology that signal controls analog circuit.
The utility model embodiment provides lead-acid battery low-voltage charging unit, the device include charging control circuit and
Single-chip microcontroller, charging control circuit include field-effect tube, and field-effect tube includes metal-oxide-semiconductor and double metal-oxide-semiconductors, and single-chip microcontroller and charge control are electric
Road connection；In the case where single-chip microcontroller acquires the first cell voltage of the first battery, if the first cell voltage is pre- lower than first
If voltage, then single-chip microcontroller output pulse width modulation (PWM) signal, the grid for controlling metal-oxide-semiconductor charge to the first battery；If
First cell voltage is higher than the first predeterminated voltage, then single-chip microcontroller stops output pwm signal；The of the second battery is acquired in single-chip microcontroller
In the case where two cell voltages, if the second cell voltage is lower than the second predeterminated voltage, single-chip microcontroller exports pulse pwm signal,
The grid for controlling double metal-oxide-semiconductors charges to the second battery；If the second cell voltage is higher than the second predeterminated voltage, single-chip microcontroller
Stop output pwm signal.By this way, the battery not powered on can be filled to low-voltage to charge, to improve the benefit of battery
With rate, waste is reduced.
Embodiment two:
Fig. 2 is the structural schematic diagram for the charging control circuit that the utility model embodiment two provides；Fig. 3 is the utility model
The structural schematic diagram for another charging control circuit that embodiment two provides.
Referring to fig. 2, above-mentioned charging control circuit further includes diode D1；In charging control circuit, one end of resistance R10
Input pwm signal；The other end of resistance R10 is connect with the base stage of triode Q2；The emitter of triode Q2 is connect with ground wire；Three
The collector of pole pipe Q2 is connect with one end of resistance R2；The other end of resistance R2 respectively with one end of resistance R1 and metal-oxide-semiconductor Q1
Grid connection；The anode of capacitor E1 is connect with the source electrode of the other end of resistance R1 and metal-oxide-semiconductor Q1；The cathode and ground wire of capacitor E1 connects
It connects；The drain electrode of metal-oxide-semiconductor Q1 is connect with the anode of diode D1；The cathode of diode D1 is connect with the anode of the first battery；First
The cathode of battery is connect with the emitter of triode Q2.
Referring to Fig. 3, above-mentioned double metal-oxide-semiconductors include metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4；In charging control circuit 11, resistance R10's
One end inputs pwm signal；The other end of resistance R10 is connect with the base stage of triode Q2；The emitter and ground wire of triode Q2 connects
It connects；The collector of triode Q2 is connect with one end of resistance R2；The other end of resistance R2 respectively with metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4 and electricity
Hinder R1 connection；The anode of capacitor E1 is connect with the drain electrode of the other end of resistance R1 and metal-oxide-semiconductor Q3；The cathode and ground wire of capacitor E1 connects
It connects；The source electrode of metal-oxide-semiconductor Q3 is connect with the source electrode of metal-oxide-semiconductor Q4；The drain electrode of metal-oxide-semiconductor Q4 is connect with the anode of the second battery；Second electricity
The cathode in pond is connect with the emitter of triode Q2.
Specifically, in Fig. 3, the electric current that above-mentioned resistance R10 is used to control single chip computer prevents the electric current of triode Q2 excessive；
Resistance R1 be used to so that metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q3 do not need using when remain off, and resistance R2 be used to control resistance
The electric current of R1, so that resistance R1 not pass through excessive electric current.It is necessary to using double metal-oxide-semiconductors when if electric current is excessive in circuit
121, as shown in Figure 4.
Single-chip microcontroller 10 generates a broad-adjustable impulse waveform, metal-oxide-semiconductor can be made to be connected in this way, when the voltage of battery is very low
When, at this moment the on-off action of metal-oxide-semiconductor comes into effect, and external power charges to capacitor E1 and reaches required voltage rating.
When the voltage at battery both ends increases, single-chip microcontroller 10 stops output pwm signal, and by the on-off action of metal-oxide-semiconductor, external power supply is supplied
Electrically disconnected, capacitor E1 releases the energy being filled with just now, and such capacitor E1 has reformed into " power supply ", charged the battery, when
When cell voltage reaches predeterminated voltage, which can be normally carried out charging.
Above-mentioned diode D1 includes germanium diode and silicon diode.Diode D1 includes switching diode, and inside has one
PN junction, when there is forward current, positive electricity is connected in electric current flowing；When negative electricity arrives, diode is not turned on, and can be played in circuit
Switch and buffer action.Switching diode is the unilateral conduction using diode, after semiconductor PN is plus forward bias,
In the on-state, resistance very little (tens arrive several hundred Europe)；In addition ending after reverse biased, resistance is very big, and (silicone tube is in 100M
More than Europe).Using this characteristic of switching diode, plays the role of control electric current in circuit and pass through or turn off, become one
A ideal electronic switch.
Above-mentioned metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4 include P-channel metal-oxide-semiconductor.Above-mentioned triode Q2 is NPN type triode.
Further, above-mentioned metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4 is enhanced metal-oxide-semiconductor, is divided into N-channel MOS pipe and P-channel metal-oxide-semiconductor
Two kinds, referred to as NMOS and PMOS.There are two the areas P+ in N-type silicon substrate for P-channel metal-oxide-semiconductor, are called source electrode and drain electrode, the two poles of the earth respectively
Between be not turned on, when on grid added with enough positive voltages, p-type inversion layer is presented in N-type silicon face under grid, becomes connection source
The channel of pole and drain electrode.Changing grid voltage can change the electron density in channel, to change the resistance of channel.It is MOS this
Effect pipe is known as P-channel enhancement type field effect transistor.If grid voltage is not added with regard to existing p-type inversion layer in N-type silicon substrate surface
Channel, in addition bias appropriate, can be such that the resistance of channel increases or reduces.Such MOS field effect transistor is known as P-channel consumption
The vigilant pipe of type field-effect to the greatest extent.It is referred to as PMOS transistor wherein, P-channel metal-oxide-semiconductor can easily be used as high-side driver.
Specifically, triode, full name are transistor, also referred to as bipolar junction transistor, transistor, are a kind of controls
The semiconductor devices of electric current processed；Its effect is small-signal to be zoomed into the biggish electric signal of range value.Triode is at one piece
Semiconductor-based on piece makes the PN junction of two close proximities, and bulk semiconductor is divided into three parts by two PN junctions, and middle section is
Base area, the PN junction formed between emitter region and base area is known as emitter junction, and the PN junction that collecting zone and base area are formed is known as collector junction,
It is emitter region and collecting zone that three lead-in wires, which are referred to as emitter E, base stage B and collector C two side portions, and arrangement mode has PNP
With NPN two types.
Further, resistance R2 and resistance R10 includes fixed carbon resister.It is close using high-temperature vacuum coating technology prize carbon
It is attached to porcelain stick surface and forms carbon film, then plus suitably joint cutting, and coated made of epoxy resin seal protection on its surface.
Its surface is often coated with greenism paint.The thickness of carbon film determines the size of resistance value, is usually controlled with the thickness of control film and cutting
Resistor processed.Fixed carbon resister is also known as " thermally decomposed carbon film resistance ".The Carbon deposition of hydrocarbon high temperature thermal decomposition in a vacuum exists
A kind of film resistor on matrix.With cheap, performance stabilization, resistance value and the wide feature of power bracket.
Embodiment three:
The structural schematic diagram for the charger that Fig. 4 the utility model embodiment three provides.
Referring to fig. 4, the charger further includes peripheral hardware electricity including above-mentioned lead-acid battery low-voltage battery charge controller 40
Source 41.The anode of single-chip microcontroller 10 and capacitor E1 in the external power 41 and lead-acid battery low-voltage battery charge controller 40 is even
It connects；External power 41 is used to provide charge power supply to the first battery and the second battery.The charger is also used in 10 nothing of single-chip microcontroller
In the case that method identifies the voltage of present battery, single-chip microcontroller output pwm signal is made by external signal.
Specifically, the utility model additionally provides external signal, which can be switch, which is connected to list
On piece machine 10.When cell voltage can not be identified as low as single-chip microcontroller 10, the external signal can be used, single-chip microcontroller 10 is forced to export
Pwm signal charges to low-voltage battery.
The utility model embodiment provides lead-acid battery low-voltage charging unit and charger, which includes charging control
Circuit and single-chip microcontroller processed, charging control circuit include field-effect tube, and field-effect tube includes metal-oxide-semiconductor and double metal-oxide-semiconductors, single-chip microcontroller with fill
Electric control circuit connection；In the case where single-chip microcontroller acquires the first cell voltage of the first battery, if the first cell voltage is low
In the first predeterminated voltage, then single-chip microcontroller output pulse width modulation (PWM) signal, the grid for controlling metal-oxide-semiconductor carry out the first battery
Charging；If the first cell voltage is higher than the first predeterminated voltage, single-chip microcontroller stops output pwm signal；In single-chip microcontroller acquisition the
In the case where second cell voltage of two batteries, if the second cell voltage is lower than the second predeterminated voltage, single-chip microcontroller exports arteries and veins
Pwm signal is rushed, the grid for controlling double metal-oxide-semiconductors charges to the second battery；If the second cell voltage is higher than the second default electricity
Pressure, then single-chip microcontroller stops output pwm signal.By this way, the battery not powered on can be filled to low-voltage to charge, to mention
The utilization rate of high battery reduces waste.
Charger provided by the embodiment of the utility model, with lead-acid battery low-voltage charging unit provided by the above embodiment
Technical characteristic having the same reaches identical technical effect so also can solve identical technical problem.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.To those skilled in the art, above-mentioned term can be understood in this reality with concrete condition
With the concrete meaning in novel.
It, can be with if above-mentioned function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment of the utility model method all or part
Step.And storage medium above-mentioned include: USB flash disk, it is mobile hard disk, read-only memory (ROM, Read-Only Memory), random
Access various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that above embodiments, only specific embodiment of the present utility model, to illustrate that this is practical
Novel technical solution, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned implementation
The utility model is described in detail in example, it should be understood by those skilled in the art that: any skill for being familiar with the art
Art personnel within the technical scope disclosed by the utility model, can still carry out technical solution documented by previous embodiment
Modification can readily occur in variation or equivalent replacement of some of the technical features；And these are modified, change or replace
It changes, the spirit and scope for the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution should all cover
It is within the protection scope of the utility model.Therefore, the protection scope of the utility model should be with scope of protection of the claims
It is quasi-.
Claims (10)
1. a kind of lead-acid battery low-voltage charging unit, which is characterized in that including charging control circuit and single-chip microcontroller, the charging
Control circuit includes field-effect tube, and the field-effect tube includes metal-oxide-semiconductor and double metal-oxide-semiconductors, the single-chip microcontroller and the charge control
Circuit connection；
In the case where the single-chip microcontroller acquires the first cell voltage of the first battery, if first cell voltage is lower than the
One predeterminated voltage, then the single-chip microcontroller output pulse width modulation (PWM) signal, controls the grid of the metal-oxide-semiconductor to described first
Battery charges；
If first cell voltage is higher than first predeterminated voltage, the single-chip microcontroller stops exporting the pwm signal；
In the case where the single-chip microcontroller acquires the second cell voltage of the second battery, if second cell voltage is lower than the
Two predeterminated voltages, then the single-chip microcontroller exports pulse pwm signal, control the grids of double metal-oxide-semiconductors to second battery into
Row charging；
If second cell voltage is higher than second predeterminated voltage, the single-chip microcontroller stops exporting the pwm signal.
2. the apparatus according to claim 1, which is characterized in that the charging control circuit further includes diode D1；
In the charging control circuit, one end of resistance R10 inputs the pwm signal；The other end and three of the resistance R10
The base stage of pole pipe Q2 connects；The emitter of the triode Q2 is connect with ground wire；The collector and resistance R2 of the triode Q2
One end connection；The other end of the resistance R2 is connect with the grid of one end of resistance R1 and the metal-oxide-semiconductor Q1 respectively；Capacitor E1
Anode connect with the source electrode of the other end of the resistance R1 and the metal-oxide-semiconductor Q1；The cathode of the capacitor E1 is connect with ground wire；
The drain electrode of the metal-oxide-semiconductor Q1 is connect with the anode of the diode D1；The cathode of the diode D1 and the anode of the first battery
Connection；The cathode of first battery is connect with the emitter of the triode Q2.
3. the apparatus according to claim 1, which is characterized in that double metal-oxide-semiconductors include metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4；
In the charging control circuit, one end of resistance R10 inputs the pwm signal；The other end and three of the resistance R10
The base stage of pole pipe Q2 connects；The emitter of the triode Q2 is connect with ground wire；The collector and resistance R2 of the triode Q2
One end connection；The other end of the resistance R2 is connect with the metal-oxide-semiconductor Q3, the metal-oxide-semiconductor Q4 and resistance R1 respectively；Capacitor E1
Anode connect with the drain electrode of the other end of the resistance R1 and the metal-oxide-semiconductor Q3；The cathode of the capacitor E1 is connect with ground wire；
The source electrode of the metal-oxide-semiconductor Q3 is connect with the source electrode of the metal-oxide-semiconductor Q4；The drain electrode of the metal-oxide-semiconductor Q4 connects with the anode of the second battery
It connects；The cathode of second battery is connect with the emitter of the triode Q2.
4. the apparatus according to claim 1, which is characterized in that described includes metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q3 and the MOS
Pipe Q4 includes P-channel metal-oxide-semiconductor.
5. device according to claim 2 or 3, which is characterized in that the triode Q2 is NPN type triode.
6. the apparatus of claim 2, which is characterized in that the resistance R1, the resistance R2 and the resistance R10 packet
Include fixed carbon resister.
7. the apparatus of claim 2, which is characterized in that the diode D1 includes germanium diode and silicon diode.
8. a kind of charger, which is characterized in that low including lead-acid battery described in claim 1 to claim 7 any one
Voltage battery charge controller further includes external power.
9. charger according to claim 8, which is characterized in that the external power is filled with the lead-acid battery low-voltage
Single-chip microcontroller in controller for electric consumption is connected with capacitor E1；The external power, for first battery and second electricity
Pond provides charge power supply.
10. charger according to claim 9, which is characterized in that the charger is also used to can not in the single-chip microcontroller
In the case where the voltage for identifying present battery, the single-chip microcontroller output pwm signal is made by external signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821411226.0U CN208608762U (en) | 2018-08-30 | 2018-08-30 | Lead-acid battery low-voltage charging unit and charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821411226.0U CN208608762U (en) | 2018-08-30 | 2018-08-30 | Lead-acid battery low-voltage charging unit and charger |
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| CN208608762U true CN208608762U (en) | 2019-03-15 |
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| CN201821411226.0U Active CN208608762U (en) | 2018-08-30 | 2018-08-30 | Lead-acid battery low-voltage charging unit and charger |
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