CN202435086U - Driving equalization circuit arranged between battery pack modules - Google Patents
Driving equalization circuit arranged between battery pack modules Download PDFInfo
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- CN202435086U CN202435086U CN201120568632XU CN201120568632U CN202435086U CN 202435086 U CN202435086 U CN 202435086U CN 201120568632X U CN201120568632X U CN 201120568632XU CN 201120568632 U CN201120568632 U CN 201120568632U CN 202435086 U CN202435086 U CN 202435086U
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Abstract
The utility model provides an equalization circuit, and in particular relates to a driving equalization circuit arranged between battery pack modules. The equalization circuit comprises a detection management module, a gating switch and a constant-current voltage-stabilizing module. In the embodiment of the utility model, when the management module detects that the voltage difference between a certain battery pack module and the other battery pack modules is up to the voltage difference for equalized starting, the equalization circuit is started by the management module, the high-voltage battery pack modules charge the low-voltage battery pack modules so that each battery pack module is up to an ideal full capacity state, or the high-voltage battery pack modules charge the low-voltage battery pack modules in an equalized way during discharging so that the capacities of all batteries are up to the maximum discharging capacities; and therefore, the service life of each battery pack module is prolonged, the efficiency of each battery pack module is increased, power equalizers, electric inductors and the like are reduced, and conduction and radiation are effectively controlled.
Description
Technical field
The utility model provides a kind of equalizing circuit, relates in particular to the active equalizing circuit between a kind of battery module.
Background technology
Lithium battery is accompanied by electric automobile under the major premise of current social development, hybrid vehicle, base station, back-up source, application such as portable power source and electrical network energy storage.The battery series connection is widely used under various application.But this series connected battery pack module has brought to management system that very big trouble---the capacity between cell and the battery module does not match.This problem can be more and more serious with the prolongation of service time, finally causes battery complete failure---and can not charge, can not discharge.
Certainly the way that addresses this is that is exactly a balancing technique.So far; A lot of engineers adopted the resistance consumption formula balanced; Just,, just open the bypass resistance of corresponding battery if the overtension of some or a plurality of battery modules or cell is arranged at each battery all switching device of bypass and a power resistor of series connection; Like this with the power consumption of high-tension battery or battery module to resistance; Quite with unnecessary electric quantity consumption to bypass resistance, the voltage of battery just can not be too high like this, thereby protected the influence that battery do not overcharged and damage.This technology has good effect at the battery that the baby battery pack module perhaps is in floating charge for a long time.Mainly be balanced in charging process, in discharge process, forbid equilibrium.But picture is used in electric automobile, and it is insignificant just to seem in the electrical appliance of other high-power fast charging and dischargings.
Here the solution that also has other can realize initiatively balanced through a series of inductance and switching device like the bq78pl114 chip of TI.Initiatively balanced---exactly module or the unnecessary electric weight of cell are transferred to other module of owing electric weight or monomers; Having compared greatly much of euqalizing current with the deflection type equilibrium; Effect is also obvious; But most importantly this equilibrium is transferred to energy in other battery modules and has been gone, and on-consumable is on resistance, so do not generate heat.Efficient has improved.Certainly owing to used the principle of Switching Power Supply, this makes our whole system very trouble that on EMC (electromagnetic compatibility), seems, the conduction on the whole output line of battery module and all will increase the radiation in space.
Also has a solution in addition; Fly capacitive; On each battery that switches to the series-connected cell pack module of the bigger electric capacity of capacity being rotated with switching device exactly; Can play balanced effect equally like this, the high battery of voltage automatically with power storage in electric capacity, and the low battery of voltage obtains electric energy automatically from electric capacity.This working method is very outstanding in theory, but this mode need switch on each battery of series-connected cell fast, has brought trouble for the selection of relay; If select the standard machinery relay for use; Then the life-span not long, if select the optical semiconductor controlled relay for use, then cost an arm and a leg.
The utility model content
The purpose of the utility model embodiment is to provide the equalizing circuit of the active between a kind of battery module; Be intended to solve existing resistance consumption formula balancing technique and in high-power fast charging and discharging electrical appliance, do not have effect; And existing initiatively balancing technique is owing to used the principle of Switching Power Supply on EMC, to bother very much; And if existing the utilization fly that balancing technique that capacitive realizes is selected common relay for use then useful life is not long, select the then expensive problem of optical semiconductor controlled relay for use.
The utility model embodiment is achieved in that the active equalizing circuit between a kind of battery module, and said equalizing circuit comprises:
Detect the voltage of each battery module,, find out the testing circuit of maximum voltage with the battery module of minimum voltage with the voltage ordering of said each battery module;
Make the maximum voltage module be operated in the constant current Voltage stabilizing module under the constant current voltage stabilizing pattern for the charging of minimum voltage module;
The gating switch that links to each other with the both positive and negative polarity of two inputs of said constant current Voltage stabilizing module and two outputs and said each battery module respectively;
Control end with said testing circuit and said gating switch is connected respectively, controls the administration module that said gating switch charges for the battery module of minimum voltage through said constant current Voltage stabilizing module the battery module of maximum voltage when setting balanced standard pressure difference when the voltage difference between maximum voltage and the minimum voltage battery module reaches.
In the said structure, said administration module is single-chip microcomputer U1, and the input port IN of said single-chip microcomputer U1 is connected with said testing circuit, and the output port OUT of the U1 of said single-chip microcomputer links to each other with the control end of said gating switch.
In the said structure, said constant current Voltage stabilizing module is a DC/DC transducer, and said DC/DC transducer comprises:
The voltage of control input and the DC/DC control module of electric current;
The electrical isolation module that is connected with said DC/DC control module;
Be connected the voltage of feedback output and the DC/DC feedback module of electric current with said electrical isolation module.
In the utility model embodiment, when the voltage difference that detects voltage and other battery modules of certain battery module when administration module reached balanced voltage difference of opening, at this time administration module was opened equalizing circuit; With of the battery module charging of high-tension battery module to low-voltage; The capacity that reaches each battery module is charged to desirable full electricity, or equilibrium is charged high-tension battery module to the low-voltage battery pack module when discharge, makes the capacity of all batteries all reach maximum discharge capacity; Just make battery module reach maximum mode of operation; Thereby improved the life-span and the efficient of battery module, reduced equal power device, inductance component etc., and made conduct radiation all be controlled effectively; Increased initiatively euqalizing current; Improved initiatively balanced efficient, reduced the cost of balance module, and made entire circuit EMC and EMI (electromagnetic interference) controlled.
Description of drawings
The structure chart of the active equalizing circuit between the battery module that Fig. 1 provides for the utility model one embodiment;
The exemplary circuit figure of the active equalizing circuit between the battery module that Fig. 2 provides for the utility model one embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 shows the structure of the active equalizing circuit between the battery module that the utility model one embodiment provides, and for the ease of explanation, only shows the part relevant with the utility model.
Active equalizing circuit between the battery module that provides as the utility model one embodiment is characterized in that said equalizing circuit comprises:
Detect the voltage of each battery module,, find out the testing circuit 140 of maximum voltage with the battery module of minimum voltage with the voltage ordering of said each battery module;
Make the maximum voltage module be operated in the constant current Voltage stabilizing module 130 under the constant current voltage stabilizing pattern for the charging of minimum voltage module;
The gating switch 120 that links to each other with the both positive and negative polarity of two inputs of said constant current Voltage stabilizing module 130 and two outputs and said each battery module respectively;
Control end with said testing circuit 140 and said gating switch 120 is connected respectively, controls the administration module 110 that said gating switch charges for the battery module of minimum voltage through said constant current Voltage stabilizing module the battery module of maximum voltage when setting balanced standard pressure difference when the voltage difference between maximum voltage and the minimum voltage battery module reaches.
Fig. 2 shows the exemplary circuit figure of the active equalizing circuit between the battery module that the utility model one embodiment provides, and for the ease of explanation, only shows the part relevant with the utility model.
As the utility model one embodiment, said administration module 110 is single-chip microcomputer U1, and the input port IN of said single-chip microcomputer U1 is connected with said testing circuit 140, and the output port OUT of the U1 of said single-chip microcomputer links to each other with the control end of said gating switch 120.
As the utility model one embodiment, said constant current Voltage stabilizing module 130 is a DC/DC transducer, and said DC/DC transducer comprises:
DC/DC control module 131, electrical isolation module 132 and DC/DC feedback module 133;
Said DC/DC control module 131 comprises two inputs, and said two inputs are connected with said gating switch 120, and said DC/DC control module 131 is used to control the voltage and the electric current of input;
Said electrical isolation module 132 is connected between said DC/DC control end 131 and the DC/DC feedback end 133;
Said DC/DC feedback module 133 comprises two outputs, and said two outputs are connected with said gating switch 120, and said DC/DC feedback module 133 is used to feed back the voltage and the electric current of output.
As the utility model one embodiment, said electrical equipment isolation module 132 comprises:
Optocoupler OC1 and transformer T1;
Said optocoupler OC1 and said transformer T1 are connected between said DC/DC control module 131 and the said DC/DC feedback module 133; The input of said optocoupler OC1 is connected with said DC/DC feedback module 133, and the output of said optocoupler OC1 is connected with said DC/DC control module 131.
As the utility model one embodiment; The negative pole of battery module BT1 links to each other with the positive pole of battery module BT2; The negative pole of battery module BT2 links to each other with the positive pole of battery module BT3; The both positive and negative polarity of each battery module respectively connects a relay; The positive pole of battery module BT1 links to each other with first end of first controlled switch of first end of first controlled switch of relay K 121 and relay K 122 respectively; The negative pole of battery module BT1 links to each other with first end of second controlled switch of first end of second controlled switch of relay K 121 and relay K 122 respectively, and second end of first controlled switch of relay K 121 links to each other with the first input end of DC/DC control module 131, and second end of second controlled switch of relay K 121 links to each other with second input of DC/DC control module 131; The first end ground connection of the control end of relay K 121; Second end of the control end of relay K 121 links to each other with first end of current-limiting resistance R121, and second end of R121 links to each other with the output port OUT of single-chip microcomputer U1, and second end of first controlled switch of relay K 122 is connected with first output of DC/DC feedback module 133; Second end of second controlled switch of relay K 122 is connected with second output of DC/DC feedback module 133; The first end ground connection of the control end of relay K 122, second end of the control end of relay K 122 links to each other with first end of current-limiting resistance R122, and second end of current-limiting resistance R122 links to each other with the output port OUT of single-chip microcomputer U1; The positive pole of battery module BT2 links to each other with first end of first controlled switch of first end of first controlled switch of relay K 123 and relay K 124 respectively; The negative pole of battery module BT2 links to each other with first end of second controlled switch of first end of second controlled switch of relay K 123 and relay K 124 respectively; Second end of first controlled switch of relay K 123 links to each other with the first input end of DC/DC control module 131; Second end of second controlled switch of relay K 123 links to each other with second input of DC/DC control module 131; The first end ground connection of the control end of relay K 123; Second end of the control end of relay K 123 links to each other with first end of current-limiting resistance R123; Second end of R123 links to each other with the output port OUT of single-chip microcomputer U1; Second end of first controlled switch of relay K 124 is connected with first output of DC/DC feedback module 133, and second end of second controlled switch of relay K 124 is connected with second output of DC/DC feedback module 133, the first end ground connection of the control end of relay K 124; Second end of the control end of relay K 124 links to each other with first end of current-limiting resistance R124, and second end of current-limiting resistance R124 links to each other with the output port OUT of single-chip microcomputer U1; The positive pole of battery module BT3 links to each other with first end of first controlled switch of first end of first controlled switch of relay K 125 and relay K 126 respectively; The negative pole of battery module BT1 links to each other with first end of second controlled switch of first end of second controlled switch of relay K 125 and relay K 126 respectively; Second end of first controlled switch of relay K 125 links to each other with the first input end of DC/DC control module 131; Second end of second controlled switch of relay K 125 links to each other with second input of DC/DC control module 131; The first end ground connection of the control end of relay K 125; Second end of the control end of relay K 125 links to each other with first end of current-limiting resistance R125; Second end of R125 links to each other with the output port OUT of single-chip microcomputer U1; Second end of first controlled switch of relay K 126 is connected with first output of DC/DC feedback module 133, and second end of second controlled switch of relay K 126 is connected with second output of DC/DC feedback module 133, the first end ground connection of the control end of relay K 126; Second end of the control end of relay K 126 links to each other with first end of current-limiting resistance R126, and second end of current-limiting resistance R126 links to each other with the output port OUT of single-chip microcomputer U1.
Embodiment shown in the figure two is a situation of having only three battery modules, if there is more battery module to connect according to the identical mode of connection.
In the utility model embodiment, (battery is not charging or during low discharging current, the voltage of battery itself returns the capacity platform that returns to battery when battery module is in static state; When the static state, no matter battery capacity is 10% or 90% like ferric phosphate lithium cell, and voltage all can be between 3.2～3.35) or battery module when voltage difference is smaller in working order the time; Do not need equilibrium; The administration module 110 initiatively input and output relay control of equalizing circuit breaks off, and promptly K1～Kn controls disconnection, in this case; Because initiatively the power supply of equalizing circuit is the powered battery that input stage is arranged; Under the situation of breaking off, initiatively the power consumption of equalizing circuit is 0, has guaranteed the whole low-power consumption of the administration module 110 under dormancy or holding state.When battery module is in charging or the discharge process and voltage difference between the battery module reaches when setting balanced voltage difference, at this time initiatively equalizing circuit is started working, and mode of operation is following:
Suppose BT1, the voltage of each battery pack of BT2～BTn is respectively V1, V2;～Vn, administration module is found out maximum voltage Vmax and Vmin with V1～Vn ordering; Vmax, Vmin belong to V1～Vn, the corresponding BTmax of Vmax, the corresponding BTmin of Vmin; Administration module 110 can the control relay K min closure corresponding with BTmin be connected 133 with BTmin with the DC/DC feedback module, and the control relay K max closure corresponding with BTmax is connected BTmax with DC/DC control module 131 then.At this time the DC/DC transducer is operated under the constant voltage and current limiting pattern.Output voltage is the voltage of battery module to the maximum, and electric current is balanced effective current.In order to prolong the life-span of relay, can be earlier the output of DC/DC transducer be communicated with, give the power supply of DC/DC transducer again, it is excessive and influence life-span of relay to avoid contact current occurring at powered on moment like this.
In the utility model embodiment, when the voltage difference that detects voltage and other battery modules of certain battery module when administration module reached balanced voltage difference of opening, at this time administration module was opened equalizing circuit; With of the battery module charging of high-tension battery module to low-voltage; The capacity that reaches each battery module is charged to desirable full electricity, or equilibrium is charged high-tension battery module to the low-voltage battery pack module when discharge, makes the capacity of all batteries all reach maximum discharge capacity; Just make battery module reach maximum mode of operation; Thereby improved the life-span and the efficient of battery module, reduced equal power device, inductance component etc., and made conduct radiation all be controlled effectively; Increased initiatively euqalizing current; Improved initiatively balanced efficient, reduced the cost of balance module, and made entire circuit EMC and EMI controlled.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (5)
1. the active equalizing circuit between the battery module is characterized in that said equalizing circuit comprises:
Detect the voltage of each battery module,, find out the testing circuit of maximum voltage with the battery module of minimum voltage with the voltage ordering of said each battery module;
Make the maximum voltage module be operated in the constant current Voltage stabilizing module under the constant current voltage stabilizing pattern for the charging of minimum voltage module;
The gating switch that links to each other with the both positive and negative polarity of two inputs of said constant current Voltage stabilizing module and two outputs and said each battery module respectively;
Control end with said testing circuit and said gating switch is connected respectively, controls the administration module that said gating switch charges for the battery module of minimum voltage through said constant current Voltage stabilizing module the battery module of maximum voltage when setting balanced standard pressure difference when the voltage difference between maximum voltage and the minimum voltage battery module reaches.
2. active equalizing circuit as claimed in claim 1; It is characterized in that; Said administration module is single-chip microcomputer U1, and the input port IN of said single-chip microcomputer U1 is connected with said testing circuit, and the output port OUT of the U1 of said single-chip microcomputer links to each other with the control end of said gating switch.
3. active equalizing circuit as claimed in claim 1 is characterized in that, said constant current Voltage stabilizing module is a DC/DC transducer, and said DC/DC transducer comprises:
The voltage of control input and the DC/DC control module of electric current;
The electrical isolation module that is connected with said DC/DC control module;
Be connected the voltage of feedback output and the DC/DC feedback module of electric current with said electrical isolation module.
4. active equalizing circuit as claimed in claim 3 is characterized in that, said electrical isolation module comprises:
Optocoupler and transformer;
Said optocoupler and said transformer all are connected between said DC/DC control module and the said DC/DC feedback module, and the input of said optocoupler is connected with said DC/DC feedback module, and the output of said optocoupler is connected with said DC/DC control module.
5. active equalizing circuit as claimed in claim 1; It is characterized in that; Said gating switch is a group relay; Each battery module both positive and negative polarity respectively connects a relay; Said relay comprises a control end and two controlled switchs, and the control end of first relay links to each other with said administration module, and first end of first controlled switch of said first relay links to each other with the positive pole of said battery module; Second end of first controlled switch of said first relay links to each other with the input of said constant current Voltage stabilizing module; First end of second controlled switch of said first relay links to each other with the negative pole of said battery module, and second end of second controlled switch of said first relay links to each other with another input of said constant current Voltage stabilizing module, and the control end of second relay links to each other with said administration module; First end of first controlled switch of said second relay links to each other with the positive pole of said battery module; Second end of first controlled switch of said second relay links to each other with the output of said constant current Voltage stabilizing module, and first end of second controlled switch of said second relay links to each other with the negative pole of said battery module, and second end of second controlled switch of said second relay links to each other with another output of said constant current Voltage stabilizing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120568632XU CN202435086U (en) | 2011-12-30 | 2011-12-30 | Driving equalization circuit arranged between battery pack modules |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120568632XU CN202435086U (en) | 2011-12-30 | 2011-12-30 | Driving equalization circuit arranged between battery pack modules |
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| CN202435086U true CN202435086U (en) | 2012-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120568632XU Expired - Fee Related CN202435086U (en) | 2011-12-30 | 2011-12-30 | Driving equalization circuit arranged between battery pack modules |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522798A (en) * | 2011-12-30 | 2012-06-27 | 深圳桑达国际电子器件有限公司 | Method for realizing active equalization among battery pack modules and circuit |
-
2011
- 2011-12-30 CN CN201120568632XU patent/CN202435086U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522798A (en) * | 2011-12-30 | 2012-06-27 | 深圳桑达国际电子器件有限公司 | Method for realizing active equalization among battery pack modules and circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20141230 |
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| EXPY | Termination of patent right or utility model |