CN208209591U - A kind of battery voltage equalizing circuit based on transformer - Google Patents
A kind of battery voltage equalizing circuit based on transformer Download PDFInfo
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- CN208209591U CN208209591U CN201820835035.0U CN201820835035U CN208209591U CN 208209591 U CN208209591 U CN 208209591U CN 201820835035 U CN201820835035 U CN 201820835035U CN 208209591 U CN208209591 U CN 208209591U
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Abstract
The utility model provides a kind of battery voltage equalizing circuit based on transformer, including battery pack and voltage balancing module；Battery pack includes the single battery of several series connections；Voltage balancing module includes electric voltage equalization unit identical with single battery quantity；Each electric voltage equalization unit includes transformer and switching circuit；Transformer includes the first armature winding, the second armature winding and secondary windings；The different name end of first armature winding and the Same Name of Ends of the second armature winding pass through switching circuit alternate conduction to the cathode of corresponding single battery；The secondary windings of transformer is connected in parallel in each electric voltage equalization unit.Battery voltage equalizing circuit provided by the utility model based on transformer, for the voltage differences of battery pack each single battery during charging and discharging, it is automatic in real time to carry out electric voltage equalization, ensure that the low single battery of voltage can obtain the isolation type safety charging of the higher single battery of other voltages, realizes low-loss efficient electric voltage equalization.
Description
Technical field
The utility model relates to battery circuit technical field, in particular to a kind of battery voltage based on transformer is balanced
Circuit.
Background technique
Single battery is because capacity and voltage are limited, and often need for more piece single battery to be together in series one electricity of composition
Press relatively high, the relatively large battery pack of capacity come using.Series-connected cell group during use, due to each single battery manufacture
The difference of individual capacity caused by the factors such as technique, when charging, the battery that capacity is small, performance is poor, which can generate, overcharges electrical phenomena, and
In electric discharge, the battery that capacity is small, performance is poor can generate over-discharge electrical phenomena again；With great security risk, and can shorten
The service life of battery pack.
It brings, is needed in battery pack use process in order to solve the problems, such as difference between each single battery of series-connected cell group
In electric voltage equalization is carried out to each single battery of battery pack.In the prior art mainly by every monomer electricity in battery pack
One resistance of pond parallel connection, is realized balanced by way of the extra electricity of resistance consumption.However the extra electricity of resistance consumption will lead to
Battery pack local pyrexia heating, it is high for the cooling requirements of battery pack, and resistance consumption being one by way of realizing equilibrium
The waste of kind battery power, is unfavorable for energy conservation and environmental protection.
Utility model content
To solve the above-mentioned deficiency mentioned in the prior art, the utility model provides a kind of battery pack electricity based on transformer
Press equalizing circuit, with reduce battery voltage it is balanced during electric energy waste.
To achieve the above object, the utility model provides a kind of battery voltage equalizing circuit based on transformer, including
Battery pack and voltage balancing module；
The battery pack includes the single battery of several series connections；
The voltage balancing module includes electric voltage equalization unit identical with the single battery quantity；The electric voltage equalization
Unit is connected with single battery one-to-one correspondence；
Each electric voltage equalization unit includes transformer and switching circuit；
The transformer includes the first armature winding, the second armature winding and secondary windings；First armature winding and
The coil turn of second armature winding is identical；The coiling of the coil of first armature winding and second armature winding
It is contrary；
The different name end of the Same Name of Ends of first armature winding and second armature winding is connected to corresponding monomer electricity
The anode in pond；
The Same Name of Ends of the different name end of first armature winding and second armature winding is handed over by the switching circuit
For the cathode for being conducted to corresponding single battery；
The secondary windings of transformer is connected in parallel in each electric voltage equalization unit.
Further, the switching circuit includes the first field-effect tube, the second field-effect tube, field-effect tube driving circuit；
First field-effect tube is connected in series between the different name end of first armature winding and the cathode of corresponding single battery；Institute
The second field-effect tube is stated to be connected in series between the Same Name of Ends of second armature winding and the cathode of corresponding single battery；It is described
Field-effect tube driving circuit controls first field-effect tube and the second field-effect tube alternate conduction.
Further, the field-effect tube driving circuit includes the first divider resistance, the second divider resistance, the first current limliting electricity
Resistance, the second current-limiting resistance, first diode, the second diode, first capacitor and the second capacitor；
First divider resistance, the second divider resistance be connected in series in the first input power and single battery cathode it
Between；
One end of first current-limiting resistance is connected to the public of first divider resistance and second divider resistance
End；The other end of first current-limiting resistance and one end of the first capacitor, the anode of the first diode and described
The grid of first field-effect tube is connected；The other end of the first capacitor and the cathode of the first diode are connected to institute
State the Same Name of Ends of the first armature winding；
One end of second current-limiting resistance is connected to the public of first divider resistance and second divider resistance
End；The other end of second current-limiting resistance and one end of second capacitor, the anode of second diode and described
The grid of second field-effect tube is connected；The cathode of the other end of second capacitor and second diode is connected to institute
State the different name end of the second armature winding.
Further, the first diode and second diode are common-cathode dual-diode.
Further, the switching circuit further includes driving protective switch circuit；The driving protective switch circuit includes
Third field-effect tube, the 4th field-effect tube and single-chip microcontroller；
The drain electrode of the third field-effect tube is connected with the grid of first field-effect tube；The third field-effect tube
Source electrode be connected with the cathode of corresponding single battery；
The drain electrode of 4th field-effect tube is connected with the grid of second field-effect tube；4th field-effect tube
Source electrode be connected with the cathode of corresponding single battery；
The grid of the third field-effect tube and the grid of the 4th field-effect tube are connected with the single-chip microcontroller；Institute
It states single-chip microcontroller and controls the third field-effect tube and the 4th field-effect tube on or off.
Further, each electric voltage equalization unit further includes filter circuit；The filter circuit includes the first filtered electrical
Appearance, the second filter circuit, third filter capacitor, filter inductance and third diode；The anode of the third diode and institute
The different name end of the Same Name of Ends and second armature winding of stating the first armature winding is connected, the cathode of the third diode
It is connected with the anode of corresponding single battery；The filter inductance is connect with the third diodes in parallel, first filtering
After capacitor and second filter capacitor are connected in parallel, be connected in series in the filter inductance one end and corresponding single battery
Between cathode；The third filter capacitor be connected in series in the filter inductance the other end and corresponding single battery cathode it
Between.
Further, the turn ratio of the secondary windings in each transformer and the armature winding is 1~5:1.
Further, the transformer is the transformer of nanocrystalline toroidal core coiling.
Battery voltage equalizing circuit provided by the utility model based on transformer, passes through transformation in electric voltage equalization unit
Two armature winding alternate conductions of device make to produce alternating flux in the magnetic core of transformer to the output end of single battery, thus
Generate the induced voltage directly proportional to each monomer battery voltage on the secondary windings of transformer, and by the secondary of each transformer around
Group is connected in parallel, and is that the lower single battery of voltage charges by the energy transfer on secondary windings, to realize that voltage is high
The single battery single battery low to voltage carries out isolated lossless charging.Battery provided by the utility model based on transformer
Group voltage balance circuit, for the voltage differences of battery pack each single battery during charging and discharging, in real time automatically into
Row electric voltage equalization, it is ensured that the low single battery of voltage can obtain the isolation type safety charging of the higher single battery of other voltages,
Realize low-loss efficient electric voltage equalization.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit structure block diagram of the battery voltage equalizing circuit provided by the utility model based on transformer；
Fig. 2 is the circuit diagram of the electric voltage equalization unit in Fig. 1；
Fig. 3 is the circuit diagram of an embodiment of the utility model.
Appended drawing reference:
10 battery pack, 11 single battery, 20 power supply equalization unit
21 transformer, 22 switching circuit
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
" first ", " second " used in the utility model embodiment and similar word be not offered as any sequence,
Quantity or importance, and be only intended to distinguish different component parts.The similar word such as " one end ", " other end ", simply means to
The orientation or positional relationship of showing device or element is is based on the orientation or positional relationship shown in the drawings, rather than indication or suggestion institute
The device or element of finger must have a particular orientation, be constructed and operated in a specific orientation.The classes such as " comprising " or "comprising"
Like word mean the element before the word or object out cover appear in the word presented hereinafter element or object and its
It is equivalent, and it is not excluded for other elements or object." connection " either the similar word such as " connected " is not limited to physics or machine
The connection of tool, but may include electrical connection, it is either direct or indirect.
Fig. 1 is a kind of structural frames of the battery voltage equalizing circuit based on transformer provided by the embodiment of the utility model
Figure；Referring to Fig.1, the battery voltage equalizing circuit provided by the utility model based on transformer, including battery pack 10 and voltage
Balance module；
The battery pack 10 includes the single battery 11 of several series connections；
The voltage balancing module includes electric voltage equalization unit 20 identical with 11 quantity of single battery；The voltage
Balanced unit 20 is connected with the single battery 11 one-to-one correspondence；
Each electric voltage equalization unit 20 includes transformer 21 and switching circuit 22；
The transformer 21 includes the first armature winding, the second armature winding and secondary windings；First armature winding
It is identical with the coil turn of second armature winding；The coil of first armature winding and second armature winding around
Line is contrary；
The different name end of the Same Name of Ends of first armature winding and second armature winding is connected to corresponding monomer electricity
The anode in pond 11；
The Same Name of Ends of the different name end of first armature winding and second armature winding passes through the switching circuit 22
Alternate conduction to corresponding single battery 11 cathode；
The secondary windings of transformer 21 is connected in parallel in each electric voltage equalization unit 20.
When it is implemented, N is as shown in Figure 1, battery pack 10 is connected in series by N number of single battery 11 (C1~Cn)
The particular number of integer more than or equal to 2, single battery 11 can be configured as needed.Wherein the 1st single battery 11
Cathode of the cathode as battery pack 10, anode of the anode of n-th single battery 11 as battery pack 10；1st single battery
11 anode is connected with the cathode of the 2nd single battery 11, the anode and the 3rd single battery 11 of the 2nd single battery 11
Cathode be connected, and so on.
Each single battery 11 is correspondingly arranged on an electric voltage equalization unit 20, the electricity for balanced each single battery 11
Pressure.As shown in Figure 1, the circuit structure of each electric voltage equalization unit 20 is identical, electric voltage equalization unit 20 includes a transformer 21
With a switching circuit 22；Transformer 21 includes two armature windings and a secondary windings；The coil turn of two armature windings
Number is identical, direction of winding is opposite；Wherein as shown in Fig. 2, the 3rd pin of transformer 21 and the 4th pin are the first armature winding, become
2nd pin of depressor 21 and the 5th pin are the second armature winding, and the 1st pin of transformer 21 and the 6th pin are secondary windings,
Wherein the 4th pin, the 2nd pin and the 1st pin of transformer 21 be respectively the first armature winding, the second armature winding, it is secondary around
Group Same Name of Ends, the 3rd pin, the 5th pin and the 6th pin of transformer 21 be respectively the first armature winding, the second armature winding,
The different name end of secondary windings；The different name end of the Same Name of Ends of first armature winding and the second armature winding is connected to corresponding monomer electricity
The anode in pond 11, the different name end of the first armature winding and the Same Name of Ends of the second armature winding pass through 22 alternate conduction of switching circuit extremely
The cathode of corresponding single battery 11；Single battery 11 is corresponded to described in the utility model embodiment is and the electric voltage equalization unit
20 single batteries 11 being connected；
Specifically, Fig. 2 is the circuit diagram of the utility model electric voltage equalization unit, and Fig. 3 is that single battery quantity is two
Exemplary circuit schematic when a；As shown in Figure 2 and Figure 3, the switching circuit 22 in the utility model embodiment includes first
Effect pipe Qn1, the second field-effect tube Qn2 and field-effect tube driving circuit；Wherein the first field-effect tube Qn1 is connected in series in first
Between the different name end of armature winding and the cathode of corresponding single battery, for being switched on or off the different name end of the first armature winding
With the connection of the cathode of corresponding single battery；Second field-effect tube Qn2 be connected in series in the Same Name of Ends of the second armature winding with it is right
It answers between the cathode of single battery, for being switched on or off the different name end of the first armature winding and the cathode of corresponding single battery
Connection；
Field-effect tube driving circuit is for driving the first field-effect tube Qn1 and the second field-effect tube Qn2 alternate conduction, in turn
Make the first armature winding different name end and the second armature winding Same Name of Ends alternate conduction to corresponding single battery 11 cathode；?
Effect tube drive circuit includes the first divider resistance Rn1, the second divider resistance Rn2, the first current-limiting resistance Rn3, the second current limliting electricity
Hinder Rn4, first diode Yn1, the second diode Yn2, first capacitor CTn1 and the second capacitor CTn2；
As shown in Fig. 2, the first divider resistance Rn1, the second divider resistance Rn2 are connected in series in the first input power
Between chargen+ and single battery cathode, the output of the output voltage and corresponding single battery of the first input power chargen+
Voltage is identical；Voltage at the common end of first divider resistance Rn1 and the second divider resistance Rn2 is point electricity of the second piezoresistance
Pressure；Preferably, the resistance value of the second divider resistance Rn2 is 15 times~20 times of the first divider resistance Rn1, the utility model is implemented
In example, the resistance value of the first divider resistance Rn1 is 30k Ω, and the resistance value of the second divider resistance Rn2 is 510k Ω；
One end of first current-limiting resistance Rn3 is connected to the common end of the first divider resistance Rn1 and the second divider resistance Rn2；
The other end of first current-limiting resistance Rn3 and one end of first capacitor CTn1, the anode of first diode Yn1 and first effect
Should the grid of pipe Qn1 be connected, which is denoted as the first driving voltage output point Vngs1；The other end of first capacitor CTn1
The Same Name of Ends of the first armature winding, i.e. first capacitor CTn1 and first diode are connected to the cathode of first diode Yn1
Yn1 is connected in parallel；
One end of second current-limiting resistance Rn4 is connected to the first divider resistance Rn1's and the second divider resistance Rn2
Common end；One end of the other end of second current-limiting resistance Rn4 and the second capacitor CTn2, the anode of the second diode Yn2 and institute
The grid for stating the second field-effect tube Qn2 is connected, which is denoted as the second driving voltage output point Vngs2；Second capacitor
The cathode of the other end of CTn2 and the second diode Yn2 are connected to the different name end of the second armature winding, i.e. the second capacitor CTn2
It is connected in parallel with the second diode Yn2；Preferably, the first diode Yn1 and the second diode Yn2 are common cathode
Double diode.
First driving voltage output point Vngs1 is connected to the first divider resistance Rn1 and by the first current-limiting resistance Rn3
The common end of two divider resistance Rn2, the second driving voltage output point Vngs2 are connected to first point by the second current-limiting resistance Rn4
The common end of piezoresistance Rn1 and the second divider resistance Rn2, the first driving voltage output point Vngs1 and the output of the second driving voltage
The initial voltage of point Vngs2 is the voltage of the common end of the first divider resistance Rn1 and the second divider resistance Rn2, the first driving
The voltage theoretical value of voltage output point Vngs1 and the second driving voltage output point Vngs2 are identical, and the two is applied separately to first
When on the grid of effect pipe Qn1 and the second field-effect tube Qn2 grid, first produces effect pipe and the second field-effect tube Qn2 theoretically
Should simultaneously turn on, however in practice, the error as present on component parameter each in circuit system, such as
One current-limiting resistance Rn3 and the second current-limiting resistance Rn4 actual resistance certainly exist error, the first field-effect tube Qn1 and second effect
Should pipe Qn2 on state threshold voltage because the influence of production technology also certainly exists error, along with various present in circuit
The influence of the factors such as interference, so that the first field-effect tube Qn1 and the second field-effect tube Qn2 always have a meeting in practical applications
First be connected；
Assuming that the first field-effect tube Qn1 is introduced into lightly conducting, the drain electrode of the first field-effect tube Qn1 is to source electrode lightly conducting to list
The cathode of body battery 11；And the second driving voltage output point Vngs2 is connected to first by the second diode Yn2 forward conduction
The drain electrode of field-effect tube Qn1, followed by the cathode of the first field-effect tube Qn1 lightly conducting to single battery 11, so second drives
The voltage of dynamic voltage output point Vngs2 is pulled down to the cathode voltage close to single battery 11, force the second field-effect tube Qn2 into
Enter stable off state；After second field-effect tube Qn2 cut-off, the anode of single battery 11 by the second armature winding, using
First capacitor CTn1 is connected to the first driving voltage output point Vngs1, forms the positive and negative of the first driving voltage output point Vngs1
Feedback, the moment near short circuit state because first capacitor CTn1 is powered, the anode for being equivalent to single battery 11 are connected to the first drive
Dynamic voltage output point Vngs1, provides between higher driving voltage and bigger grid and source electrode for the first field-effect tube Qn1
Junction capacity charging current promotes the first field-effect tube Qn1 to quickly enter fully on state by initial lightly conducting state.
First field-effect tube Qn1 enter it is fully on after, the anode of single battery 11 is the by the second armature winding
One capacitor CTn1 continues to charge, as the voltage at the both ends first capacitor CTn1 gradually rises, because the both ends first capacitor CTn1 are electric
Pressure and the first driving voltage output point Vngs1 are series relationships, so the voltage of the first driving voltage output point Vngs1 can be therewith
It gradually decreases, until the voltage of the first driving voltage output point Vngs1 falls below the conduction threshold of the first field-effect tube Qn1
When voltage, the first field-effect tube Qn1 enters off state.As the first field-effect tube Qn1 enters off state, the second driving electricity
The voltage of pressure output point Vngs2 is restored to the voltage of the common end of the first divider resistance Rn1 and the second divider resistance Rn2；Second
Field-effect tube Qn2 enters lightly conducting state, the second field-effect tube under the voltage effect of the second driving voltage output point Vngs2
The drain electrode of Qn2 is to source electrode lightly conducting to the cathode of single battery 11；And the first driving voltage output point Vngs1 passes through the one or two pole
Pipe Yn1 forward conduction is connected to the drain electrode of the second field-effect tube Qn2, followed by the second field-effect tube Qn2 lightly conducting to monomer
The cathode of battery 11, so the voltage of the first driving voltage output point Vngs1 is pulled down to the negative electricity close to single battery 11
Pressure, forces the first field-effect tube Qn1 to enter stable off state；After first field-effect tube Qn1 cut-off, the anode of single battery 11
It is connected to the second driving voltage output point Vngs2 by the first armature winding, using the second capacitor CTn2, forms the second driving
The positive feedback of voltage output point Vngs2, the moment near short circuit state because the second capacitor CTn2 is powered, is equivalent to single battery 11
Anode be connected to the second driving voltage output point Vngs2, provide higher driving voltage and bigger for the second field-effect tube Qn2
Grid and source electrode between junction capacity charging current, promote the second field-effect tube Qn2 by initial lightly conducting state rapidly into
Enter fully on state.Subsequent second field-effect tube Qn2 ends again, and the first field-effect tube Qn1 conducting so recycles past
It is multiple.
First field-effect tube Qn1 and the second such alternate conduction of field-effect tube Qn2 so that transformer 21 first it is primary around
The different name end of group and the Same Name of Ends of the second armature winding pass through 22 alternate conduction of switching circuit to the cathode of corresponding single battery 11；
When the different name end of the first armature winding is conducting to the cathode of corresponding single battery 11 by switching circuit 22, monomer
The anode of battery 11, the first armature winding, single battery 11 cathode constitute closed circuit, have in the first armature winding electric current logical
It crosses；When the Same Name of Ends of the second armature winding is conducting to the cathode of corresponding single battery 11 by switching circuit 22, single battery
11 anode, the second armature winding, single battery 11 cathode constitute closed circuit, there is electric current to pass through in the second armature winding；
Therefore alternating flux is generated in the magnetic core of transformer 21, just accordingly generates induced voltage on the secondary windings of transformer 21；It is secondary
Induced voltage on grade winding is directly proportional to the voltage on armature winding, since the voltage on armature winding is single battery 11
Voltage, therefore the induced voltage on secondary windings is directly proportional to the voltage of single battery 11；In each electric voltage equalization unit 20
The secondary windings of transformer 21 all has the induced voltage for being proportional to each 11 voltage of single battery, the voltage of single battery 11
Bigger, the induced voltage of the secondary windings on corresponding transformer 21 is also bigger；
Since the structure of transformer 21 in each electric voltage equalization unit 20 is identical, i.e., each 21 armature winding of transformer and it is secondary around
The direction of winding of identical, the corresponding winding of group turn ratio is identical, therefore when each 11 voltage of single battery is equal, each transformer 21
The induced voltage of secondary windings is also equal, that is to say, that without electricity when each 21 secondary windings of transformer is connected in parallel
Pressure difference so almost just existing without loop current, that is, is in low power consumpting state.
When certain deviation occurs in each 11 voltage of single battery, 11 voltage of single battery is higher will be corresponding
Higher induced voltage is induced on 21 secondary windings of transformer；When the secondary windings of each transformer 21 is connected in parallel,
On the secondary windings that the high secondary windings of induced voltage will force down energy transfer to induced electricity, so that generate energy transfer electricity
Stream；As the energy on the secondary windings of the corresponding transformer 21 of the lower single battery 11 of voltage increases, the energy on secondary windings
Amount will incude the armature winding for being transferred to corresponding transformer 21 again, and then the lower single battery 11 of voltage charges, from
And it realizes the high single battery 11 of voltage and carries out incuding isolated charging by the single battery 11 low to voltage of transformer 21
Function.
Battery voltage equalizing circuit provided by the embodiment of the utility model based on transformer, passes through electric voltage equalization unit
Two armature winding alternate conductions of middle transformer make to produce alternation magnetic in the magnetic core of transformer to the output end of single battery
It is logical, to generate the induced voltage directly proportional to each monomer battery voltage on the secondary windings of transformer, and by each transformer
Secondary windings be connected in parallel, be that the lower single battery of voltage charges by the energy transfer on secondary windings, to realize
The high single battery of the voltage single battery low to voltage carries out isolated lossless charging.Base provided by the embodiment of the utility model
In the battery voltage equalizing circuit of transformer, for the voltage difference of battery pack each single battery during charging and discharging
It is different, it is automatic in real time to carry out electric voltage equalization, it is ensured that the low single battery of voltage can obtain the higher single battery of other voltages every
From formula safe charging, low-loss efficient electric voltage equalization is realized.
Preferably, the switching circuit 22 further includes driving protective switch circuit 22；The driving protective switch circuit 22
Including third field-effect tube Qn3, the 4th field-effect tube Qn4 and single-chip microcontroller；
The drain electrode of the third field-effect tube Qn3 is connected with the grid of the first field-effect tube Qn1；The third field
The source electrode of effect pipe Qn3 is connected with the cathode of corresponding single battery 11；
The drain electrode of the 4th field-effect tube Qn4 is connected with the grid of the second field-effect tube Qn2；Described 4th
The source electrode of effect pipe Qn4 is connected with the cathode of corresponding single battery 11；
The grid of the grid of the third field-effect tube Qn3 and the 4th field-effect tube Qn4 with the single-chip microcontroller phase
Connection；The single-chip microcontroller controls the third field-effect tube Qn3 and the 4th field-effect tube Qn4 on or off.
When it is implemented, further include a driving protective switch circuit 22 in each switching circuit 22, driving protective switch electricity
Road 22 is used to provide driving protection shutdown signal to the first field-effect tube Qn1 and the second field-effect tube Qn2, makes the first field-effect tube
Qn1 and the second field-effect tube Qn2 are constantly in off state；As shown in Fig. 2, driving protective switch circuit 22 includes third field
Effect pipe Qn3, the 4th field-effect tube Qn4 and single-chip microcontroller；The wherein drain electrode of third field-effect tube Qn3 and the first field-effect tube Qn1
Grid be connected；The source electrode of third field-effect tube Qn3 is connected with the cathode of corresponding single battery 11；4th field-effect tube
The drain electrode of Qn4 is connected with the grid of the second field-effect tube Qn2；The source electrode of 4th field-effect tube Qn4 and corresponding single battery 11
Cathode be connected；The grid of third field-effect tube Qn3 and the grid of the 4th field-effect tube Qn4 are connected with single-chip microcontroller；It is single
Piece machine controls third field-effect tube Qn3 and the 4th field-effect tube Qn4 on or off；
When needing to stop the voltage balancing function of battery pack 10, single-chip microcontroller is to the grid of third field-effect tube Qn3 and
Electricity needed for grid of the grid output higher than third field-effect tube Qn3 of four field-effect tube Qn4 and the 4th field-effect tube Qn4 conducting
Pressure, keeps the grid of third field-effect tube Qn3 and the 4th field-effect tube Qn4 in the conductive state, thus the first field-effect tube Qn1
Grid and the second field-effect tube Qn2 gate turn-on to single battery 11 cathode so that the first field-effect tube Qn1 and second
Field-effect tube Qn2 is constantly in off state, to close the voltage balancing function of battery pack 10.
Preferably, each electric voltage equalization unit 20 further includes filter circuit；The filter circuit includes the first filtered electrical
Hold Cn1, the second filter capacitor Cn2, third filter capacitor Cn3, filter inductance Ln1 and third diode Dn1；Described 3rd 2
The anode of pole pipe Dn1 is connected with the different name end of the Same Name of Ends of first armature winding and second armature winding, institute
The cathode for stating third diode Dn1 is connected with the anode of corresponding single battery 11；The filter inductance Ln1 and the described 3rd 2
Pole pipe Dn1 is connected in parallel, and after the first filter capacitor Cn1 and second filter capacitor are connected in parallel, is connected in series in institute
It states between one end of filter inductance Ln1 and the cathode of corresponding single battery 11；The third filter capacitor Cn3 is connected in series in institute
It states between the other end of filter inductance Ln1 and the cathode of corresponding single battery 11.
When it is implemented, as shown in Fig. 2, further including filter circuit in each electric voltage equalization unit 20, filter circuit includes
First filter capacitor Cn1, the second filter capacitor Cn2, third filter capacitor Cn3, filter inductance Ln1 and third diode Dn1；
The anode of third diode Dn1 is connected with the different name end of the Same Name of Ends of the first armature winding and the second armature winding, third
The cathode of diode Dn1 is connected with the anode of corresponding single battery 11；Filter inductance Ln1 is in parallel with third diode Dn1 to be connected
It connects, after the first filter capacitor Cn1 and the second filter capacitor are connected in parallel, is connected in series in one end of filter inductance Ln1 and corresponding
Between the cathode of single battery 11；Third filter capacitor Cn3 is connected in series in the other end and corresponding monomer electricity of filter inductance Ln1
Between the cathode in pond 11.Wherein the first filter capacitor Cn1 be used for High frequency filter；Second filter capacitor Cn2, third filter capacitor
Cn3, filter inductance Ln1 composition pi type filter play the role of stable input and output voltage.
Preferably, the turn ratio of the secondary windings in each transformer 21 and the armature winding is 1~5:1.
When it is implemented, the turn ratio of secondary windings and armature winding in each transformer 21 is 1~5:1, by the way that transformer 21 is arranged
Secondary winding coil turn ratio armature winding coil turn it is some more, the induced electricity on each secondary windings is amplified with this
It is low to voltage to can be achieved with the high single battery 11 of voltage so that each single battery 11 is in lesser pressure difference for the difference of pressure
Single battery 11 carry out energy transfer charging；Meanwhile voltage amplification coefficient also should not be too large, and otherwise incude in transformer 21
Under the premise of energy estimate methods, the voltage of transfer is higher, not only higher to the resistance to pressure request of device, the electric current of transfer be it is smaller,
It is equivalent to that euqalizing current is smaller, is unfavorable for the balancing energy of battery pack 10.Preferably, the secondary in each transformer 21
The turn ratio of winding and the armature winding is 3:1.
Preferably, the transformer 21 is the transformer 21 of nanocrystalline toroidal core coiling.When it is implemented, utilizing high property
The transformer 21 of the nanocrystalline toroidal core coiling of energy, has splendid temperature characterisitic, and high magnetic permeability reduces low excitation function
Rate reduces copper loss and iron loss, to reduce the loss in energy transfer process, improve electric voltage equalization efficiency.
Although more herein used such as single battery, electric voltage equalization unit, transformer, armature winding, secondary
The terms such as winding, turn ratio, field-effect tube, divider resistance, current-limiting resistance, filter capacitor, diode, but be not precluded and use it
A possibility that its term.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；It
To be construed to any additional limitation all be contrary to the spirit of the present invention.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (8)
1. a kind of battery voltage equalizing circuit based on transformer, it is characterised in that: including battery pack and voltage balancing module；
The battery pack includes the single battery of several series connections；
The voltage balancing module includes electric voltage equalization unit identical with the single battery quantity；The electric voltage equalization unit
It is connected with single battery one-to-one correspondence；
Each electric voltage equalization unit includes transformer and switching circuit；
The transformer includes the first armature winding, the second armature winding and secondary windings；First armature winding and described
The coil turn of second armature winding is identical；The direction of winding of the coil of first armature winding and second armature winding
On the contrary；
The different name end of the Same Name of Ends of first armature winding and second armature winding is connected to corresponding single battery
Anode；
The Same Name of Ends of the different name end of first armature winding and second armature winding is alternately led by the switching circuit
Pass to the cathode of corresponding single battery；
The secondary windings of transformer is connected in parallel in each electric voltage equalization unit.
2. the battery voltage equalizing circuit according to claim 1 based on transformer, it is characterised in that: the switch electricity
Road includes the first field-effect tube, the second field-effect tube, field-effect tube driving circuit；First field-effect tube is connected in series in institute
It states between the different name end of the first armature winding and the cathode of corresponding single battery；Second field-effect tube is connected in series in described
Between the Same Name of Ends of second armature winding and the cathode of corresponding single battery；The field-effect tube driving circuit control described first
Field-effect tube and the second field-effect tube alternate conduction.
3. the battery voltage equalizing circuit according to claim 2 based on transformer, it is characterised in that: the field-effect
Tube drive circuit include the first divider resistance, the second divider resistance, the first current-limiting resistance, the second current-limiting resistance, first diode,
Second diode, first capacitor and the second capacitor；
First divider resistance, the second divider resistance are connected in series between the first input power and single battery cathode；
One end of first current-limiting resistance is connected to the common end of first divider resistance and second divider resistance；Institute
State the other end of the first current-limiting resistance and one end of the first capacitor, positive and described first of the first diode
The grid of effect pipe is connected；The other end of the first capacitor and the cathode of the first diode are connected to described first
The Same Name of Ends of armature winding；
One end of second current-limiting resistance is connected to the common end of first divider resistance and second divider resistance；Institute
State the other end of the second current-limiting resistance and one end of second capacitor, positive and described second of second diode
The grid of effect pipe is connected；The cathode of the other end of second capacitor and second diode is connected to described second
The different name end of armature winding.
4. the battery voltage equalizing circuit according to claim 3 based on transformer, it is characterised in that: the described 1st
Pole pipe and second diode are common-cathode dual-diode.
5. the battery voltage equalizing circuit according to claim 4 based on transformer, it is characterised in that: the switch electricity
Road further includes driving protective switch circuit；The driving protective switch circuit include third field-effect tube, the 4th field-effect tube and
Single-chip microcontroller；
The drain electrode of the third field-effect tube is connected with the grid of first field-effect tube；The source of the third field-effect tube
Pole is connected with the cathode of corresponding single battery；
The drain electrode of 4th field-effect tube is connected with the grid of second field-effect tube；The source of 4th field-effect tube
Pole is connected with the cathode of corresponding single battery；
The grid of the third field-effect tube and the grid of the 4th field-effect tube are connected with the single-chip microcontroller；The list
Piece machine controls the third field-effect tube and the 4th field-effect tube on or off.
6. the battery voltage equalizing circuit according to claim 1 based on transformer, it is characterised in that: each voltage
Balanced unit further includes filter circuit；The filter circuit includes the first filter capacitor, the second filter circuit, third filtered electrical
Appearance, filter inductance and third diode；The anode of the third diode and the Same Name of Ends of first armature winding and
The different name end of second armature winding is connected, and the cathode of the third diode is connected with the anode of corresponding single battery
It connects；The filter inductance is connect with the third diodes in parallel, and first filter capacitor and second filter capacitor are simultaneously
After connection connection, it is connected in series between one end of the filter inductance and the cathode of corresponding single battery；The third filtered electrical
Appearance is connected in series between the other end of the filter inductance and the cathode of corresponding single battery.
7. the battery voltage equalizing circuit according to claim 1 based on transformer, it is characterised in that: each transformation
The turn ratio of the secondary windings and the armature winding in device is 1~5:1.
8. described in any item battery voltage equalizing circuits based on transformer according to claim 1~7, it is characterised in that:
The transformer is the transformer of nanocrystalline toroidal core coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835035.0U CN208209591U (en) | 2018-05-31 | 2018-05-31 | A kind of battery voltage equalizing circuit based on transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835035.0U CN208209591U (en) | 2018-05-31 | 2018-05-31 | A kind of battery voltage equalizing circuit based on transformer |
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| Publication Number | Publication Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509791A (en) * | 2019-01-30 | 2020-08-07 | 广达电脑股份有限公司 | Battery automatic regulating unit and battery automatic balancing system |
| CN114156981A (en) * | 2021-12-03 | 2022-03-08 | 傲普(上海)新能源有限公司 | Battery module equalization control circuit and method based on transformer |
-
2018
- 2018-05-31 CN CN201820835035.0U patent/CN208209591U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509791A (en) * | 2019-01-30 | 2020-08-07 | 广达电脑股份有限公司 | Battery automatic regulating unit and battery automatic balancing system |
| CN111509791B (en) * | 2019-01-30 | 2021-10-26 | 广达电脑股份有限公司 | Battery automatic regulating unit and battery automatic balancing system |
| CN114156981A (en) * | 2021-12-03 | 2022-03-08 | 傲普(上海)新能源有限公司 | Battery module equalization control circuit and method based on transformer |
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