CN208986621U - Battery voltage balancing circuit and power supply device - Google Patents
Battery voltage balancing circuit and power supply device Download PDFInfo
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- CN208986621U CN208986621U CN201821421490.2U CN201821421490U CN208986621U CN 208986621 U CN208986621 U CN 208986621U CN 201821421490 U CN201821421490 U CN 201821421490U CN 208986621 U CN208986621 U CN 208986621U
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Abstract
The utility model discloses a kind of battery voltage balancing circuit, comprising: balance module, including multiple balanced units, multiple balanced units are electrically connected one by one with the output end of multiple battery modules；Switch module, including multiple switch unit, multiple switch unit are electrically connected to one by one between multiple balanced units and multiple battery modules；Control module is electrically connected with each balanced unit and each switch unit, to control the working condition of each balanced unit and the switch state of each switch unit；Wherein, when the voltage of wherein one or more battery modules of battery pack is higher than the voltage of other battery modules, control module controls the switching means conductive connecting with the higher battery module of voltage, and the balanced unit connecting with the higher battery module of voltage is opened simultaneously, Balance route is carried out with the voltage to the higher battery module of voltage.A kind of power supply device is also disclosed in the utility model.The utility model improves balanced safety.
Description
Technical field
The utility model relates to battery voltage balanced technical field more particularly to a kind of battery voltage balancing circuits and power supply
Device.
Background technique
Existing power supply device generallys use multiple single batteries (battery core) concatenated mode and improves output voltage.By
In the long-term use in the battery pack being made of multiple single batteries, with the otherness of use environment, it will cause monomer
Capacity between battery, internal resistance and self-discharge rate it is inconsistent, it is unequal so as to cause the voltage between single battery.In order to reduce
The inconsistency of voltage between single battery, it will usually electric voltage equalization is carried out to multiple single batteries using balanced method, with
Improve the output performance of battery pack.
However, being connected directly balanced unit with corresponding single battery in existing equalization methods, and then cause when equal
When weighing apparatus unit exception, corresponding single battery meeting over-discharge influences balanced safety.
Utility model content
The utility model embodiment discloses a kind of battery voltage balancing circuit and power supply device, when can be improved battery balanced
Safety, and can to battery module carry out duplicate protection.
A kind of battery voltage balancing circuit disclosed in the utility model embodiment, for multiple battery modules to battery pack
Voltage carry out Balance route, the battery voltage balancing circuit includes:
Balance module, including multiple balanced units, the output end of the multiple balanced unit and the multiple battery module
It is electrically connected one by one；
Switch module, including multiple switch unit, the multiple switch unit are electrically connected to the multiple balanced single one by one
It is first between the multiple battery module；
Control module is electrically connected with each balanced unit and each switch unit, for controlling each balanced unit
The switch state of working condition and each switch unit；
Wherein, when the voltage of wherein one or more battery modules of the battery pack is higher than the voltage of other battery modules
When, the control module controls the switching means conductive connecting with the higher battery module of voltage, and opens and the electricity simultaneously
The balanced unit for pressing higher battery module connection, carries out Balance route with the voltage to the higher battery module of the voltage.
Power supply device disclosed in the utility model embodiment, comprising: battery pack, the battery pack include multiple battery modules
And battery voltage balancing circuit as described above, the battery voltage balancing circuit are connected with the battery pack, for institute
The voltage for stating multiple battery modules of battery pack carries out Balance route.
The battery voltage balancing circuit and power supply device of the utility model, by the way that switch unit setting is balanced accordingly
Between unit and corresponding battery module, can break down in corresponding balanced unit and when failing to stop balanced operation in time,
Control module can disconnect the electricity between balanced unit and corresponding battery module by controlling corresponding switch unit cut-off
Connection, so that corresponding battery module stopping continues to discharge to corresponding balanced unit, to be the equilibrium of battery module
Duplicate protection is provided, the safety of battery voltage balancing circuit and power supply device is improved.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is the functional block diagram of the battery voltage balancing circuit in an embodiment of the present invention.
Fig. 2 is the functional block diagram of the battery voltage balancing circuit in another embodiment of the utility model.
Fig. 3 is the functional block diagram of the battery voltage balancing circuit in another embodiment of the utility model.
Fig. 4 is the circuit diagram of the battery voltage balancing circuit in an embodiment of the present invention.
Fig. 5 is the functional block diagram of the power supply device in an embodiment of the present invention.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
When an element was considered with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all technical and scientific terms used herein and belong to this reality
It is identical with the novel normally understood meaning of those skilled in the art.Made in the specification of the utility model herein
Term, which is only for the purpose of describing specific embodiments, to be not intended to limit the utility model.
Referring to Fig. 1, its functional block diagram for the battery voltage balancing circuit 100 in an embodiment of the present invention.Institute
Battery voltage balancing circuit 100 is stated for carrying out voltage balance control to battery pack 900.Wherein, the battery pack 900 includes more
A connected battery module 910, in the present embodiment, the multiple battery module 910 form battery pack 10 after connecting, in turn
Improve the output voltage of battery pack 10.
It is appreciated that different according to specific design, the quantity for the battery module 910 that battery pack 900 includes is not also identical,
For example, greater number of battery module 910 can then be connected, if desired when the voltage that if desired battery pack 900 exports is higher
When battery pack 900 exports lower voltage, then the battery module of negligible amounts 910 is connected, specific battery module 11
Quantity it is not limited here.
Further, each battery module 910 may include a single battery, can also be in parallel by more piece single battery
Composition, and then the output electric current of battery pack 900 can be improved.In the present embodiment, the single battery is preferably weight
Gently, the lithium ion battery of energy conservation and environmental protection.
The voltage balance circuit 100 includes balance module 10, switch module 20 and control module 30.The equilibrium model
Block 10 includes multiple balanced units 11, and the output end of the multiple balanced unit 11 and the multiple battery module 910 is electric one by one
Connection.Also it that is, the quantity of the balanced unit 11 is identical as the quantity of the battery module 910, and corresponds.
The switch module 20 includes multiple switch unit 21, and the multiple switch unit 21 is electrically connected to described more one by one
Between a balanced unit 11 and the multiple battery module 910.Also that is, the quantity of the switch unit 21 respectively with the battery
Module 910 and the quantity of the balanced unit 11 it is identical and correspond.
The control module 30 is electrically connected with each balanced unit 11 and each switch unit 21, to control each equilibrium
The switch state of the working condition of unit 11 and each switch unit 21.Wherein, the switch state includes switch unit 21
Conducting and off state.It, can when the balanced unit 11 work, and when corresponding switch unit 21 is in the conductive state
Balance route is carried out to corresponding battery module 910.
Specifically, when the voltage of wherein one or more battery modules 910 of the battery pack 900 is higher than other battery moulds
When the voltage of block 910, the control module 30 controls the switch unit 21 connecting with the higher battery module 910 of voltage and is connected,
And the balanced unit 11 connecting with the higher battery module 910 of the voltage is opened simultaneously, to the higher battery of the voltage
The voltage of module 910 carries out Balance route.Wherein, corresponding when the balanced unit 11 is at unlatching (in running order)
Battery module 910 discharges.
Further, in the present embodiment, the control module 30 is used in the charging process of the battery pack 900
It controls the balance module 10 and Balance route is carried out to the voltage of the higher battery module of voltage 910.For example, when to battery pack
900 when being charged, if the voltage of some battery module 910 is higher, is controlled corresponding balanced unit 11 and is started to work, directly
To high voltage battery module 11 it is equal with the voltage of other battery modules 11 when, control corresponding balanced unit 11 and stop work
Make.Also that is, being discharged in charging the higher battery module of voltage 910, make the charging rate of the higher battery module 910 of voltage
Lower than the charging rate of other battery modules 910, to reach the electricity of the higher battery module 910 of voltage during the charging process
Pressure adjusts the state being consistent to the voltage with other battery modules 910.
It should be noted that the individual due to lithium-ions battery has differences, in addition its use environment is also not quite similar,
The imbalance of each 910 electricity of battery module is caused, this imbalance can become more next with the increase of the service life of battery
It is bigger, it will seriously affect the service life of battery pack 900.Therefore, in order to extend the service life of battery pack 900, lithium ion stores
Battery in use, needs to carry out Balance route, keeps the electricity of each battery as identical as possible.
Therefore, the battery voltage balancing circuit 100 disclosed in the present embodiment works as control due to being provided with balance module 10
When molding block 30 detects that the voltage of some or multiple battery modules 910 is unbalanced, corresponding balanced unit 11 can control
Work can be improved the consistency between multiple battery modules 910 to carry out equilibrium to corresponding battery module 910, from
And improve the service life of battery pack 900.
It is appreciated that the control module 30 can be MCU (Microcontroller Unit, micro-control unit).
Battery voltage balancing circuit 100 disclosed in the utility model, by the way that the setting of switch unit 21 is equal accordingly
It weighs between unit 11 and corresponding battery module 910, can break down in corresponding balanced unit 11 and fails to stop in time equal
When weighing apparatus work, control module 30 can disconnect balanced unit 11 and corresponding electricity by controlling the corresponding cut-off of switch unit 21
Electrical connection between pond module 910, so that the corresponding stopping of battery module 910 continues to put to corresponding balanced unit 11
Electricity improves the safety of battery voltage balancing circuit 100 so that the electric voltage equalization for battery module 910 provides duplicate protection
Property.
Referring again to Fig. 2, for the principle frame for the battery voltage balancing circuit 100 that another embodiment of the utility model provides
Figure.Unlike previous embodiment, battery voltage balancing circuit 100 disclosed in the present embodiment further includes division module 40.
The division module 40 include concatenated multiple partial pressure units 41, wherein one end of the multiple partial pressure unit 41 also respectively with institute
The output end for stating multiple battery modules 910 is electrically connected one by one, and the multiple switch unit 21 is also electrically connected to the multiple one by one
Between partial pressure unit 41 and the multiple battery module 910；The control module 30 is also and in multiple partial pressure units 41
Wherein one end of one of partial pressure unit 41 is electrically connected, and the control module 30 by each partial pressure unit 41 for being acquired respectively
The voltage of a respective battery modules 910.
Further, each balanced unit 11 is electrically connected between corresponding switch unit 21 and corresponding partial pressure unit 41
Connecting node.
Specifically, the multiple partial pressure unit 41 successively joins end to end to form division module 40, also that is, multiple partial pressures are single
Member 41 is series relationship.One end of each switch unit 21 and corresponding battery module 910 are connected, and the other end with corresponding point
Unit 41 is pressed to be connected.Wherein, the control module 30 is single by controlling the conducting of some switch unit 21 and controlling other switches
Member 21 is ended, and passes through 21 phase of switch unit of corresponding with the switch unit 21 of conducting partial pressure unit 41 acquisition and conducting
The voltage of corresponding battery module 910.In this way, the control module 30, which passes through, successively controls the different conductings of switch unit 21,
And then successively detect the voltage of each battery module 910.
Battery voltage balancing circuit 100 disclosed in the utility model embodiment includes multiple switch unit by setting
21 switch module 20 and division module 40 including multiple multiple partial pressure units 41 being sequentially connected, so that control mould
Block 30 detects the corresponding voltage of each battery module 910 by controlling the on or off of corresponding switch unit 21, by
Pass through division module 40 in the voltage acquisition of each battery module 910, so that detecting the voltage of each battery module 910
When partial pressure deviation it is identical with direction, thus by each battery module 910 detect when error counteracting, improve detection essence
Degree.
Referring again to Fig. 3, for the principle frame for the voltage battery detection circuit 100 that another embodiment of the utility model provides
Figure.The battery voltage balancing circuit 100 further includes filter module 50.The filter module 50 is connected to one of them described point
Between the wherein one end and the control module 30 for pressing unit 41, for the cell voltage after the division module 40 partial pressure
It is filtered, so that the control module 30 receives pure stable voltage, and then is conducive to further increase voltage inspection
The precision of survey.
It is the circuit theory of battery voltage balancing circuit 100 disclosed in an embodiment of the present invention referring again to entering 4
Figure.Each battery module 910 includes single battery (battery core), and the single battery includes anode and cathode.Wherein, monomer electricity
The anode in pond corresponds to the output end of the battery module 910.In the present embodiment, single battery is lithium ion battery, and electricity
It is pressed in 3.7V or so.It should be noted that in other embodiments, the type and voltage of single battery are not limited thereto.
Each switch unit 21 includes the first electronic switch Q1, the second electronic switch Q2, third electronic switch Q3, the first electricity
The control terminal for hindering R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, the first electronic switch Q1 passes through described first
Resistance R1 is connected with the control module 40, and the control terminal of the first electronic switch Q1 is also connect by the second resistance R2
Ground；The first connecting pin of the first electronic switch Q1 is grounded；The second connection end of the first electronic switch Q1 passes through described
3rd resistor R3 is connected with the control terminal of the control terminal of the second electronic switch Q2 and the third electronic switch Q3 respectively；Institute
The first connecting pin for stating the second electronic switch Q2 is connected with the anode of corresponding single battery, and the second electronic switch Q2
Second connection end is connected with the first connecting pin of the third electronic switch Q3；The second connection end of the third electronic switch Q3
It is connected respectively with corresponding partial pressure unit 31 and corresponding balanced unit 11；The control terminal of the 4th resistance R4 respectively with it is described
The first connecting pin of the second connection end of second electronic switch Q2 and the third electronic switch Q3 are connected, and the 4th resistance
The first connecting pin of R4 control terminal phase with the control terminal of the second electronic switch Q2 and the third electronic switch Q3 respectively
Even.
It should be noted that the resistance R4 of first resistor R1~the 4th disclosed in the present embodiment is it is not necessary to existing,
Specifically can according to circuit design requirement and omit, for example, 3rd resistor R3 can be omitted, so that first electronic cutting
Close the control terminal of the direct and described second electronic switch Q2 of second connection end of Q1 and the control terminal of the third electronic switch Q3
It is connected.
In addition, the switch unit 21 can also only include an electronic switch, for example, when the switch unit 21 packets
When including the first electronic switch Q1, the control terminal of the first electronic switch Q1 is connected with the control module 30, first electricity
The first connecting pin of sub switch Q1 is connected with the output end of corresponding battery module 910, and the second of the first electronic switch Q1
Connecting pin is connected with corresponding balanced unit 11.At this point, the first electronic switch Q1 is configurable to metal-oxide-semiconductor field effect transistor.
Specifically, in one embodiment, the control terminal of the first electronic switch Q1, the first connecting pin and the second connection
End respectively corresponds base stage, emitter and the collector of NPN type triode.The control terminal of the second electronic switch Q2, first connect
It connects end and second connection end respectively corresponds grid, drain electrode and the source electrode of p-type metal-oxide-semiconductor field effect transistor.The third electronic switch Q3's
Control terminal, the first connecting pin and second connection end respectively correspond the grid, source electrode and drain electrode of p-type metal-oxide-semiconductor field effect transistor.In other realities
It applies in mode, the first electronic switch Q1~third electronic switch Q3 can also be other electronic cuttings for including three ends
It closes, for example, IGBT (insulated gate bipolar transistor), BJT (double pole triode) and relay etc..
In addition, in one embodiment, each switch unit 21 further includes first diode D1 and the second diode D2.Institute
The anode for stating first diode D1 is connected with the first connecting pin of the second electronic switch Q2, and the first diode D1
Cathode is connected with the second connection end of the second electronic switch Q2.The anode and the third electronics of the second diode D2
The second connection end of switch Q3 is connected, and the cathode of the second diode D2 is connect with the first of the third electronic switch Q3
End is connected.Therefore, in this embodiment, the switch unit 21 is two-way blocking-up switch, further improves the safety of circuit
Property.
It is appreciated that in other embodiments, the second diode D1 can also be with the second diode D2
The second electronic switch Q2 and third electronic switch Q3 parasitic/included diode.
In one embodiment, the partial pressure unit 40 includes divider resistance RF.The control terminal of the divider resistance RF with
The second connection end of the third electronic switch Q3 is connected, and the first connecting pin ground connection of the divider resistance RF or with it is previous
The control terminal of grade divider resistance RF is connected.
It should be noted that being located in series circuit when multiple single batteries are connected near total cathode (battery pack 900
Cathode) single battery be the first order, and so on, when there is N section single battery series connection, near total positive (battery pack
900 anode) single battery be N grades.It is first order monomer in concatenated single battery when divider resistance RF is corresponding
When battery, the first connecting pin of the divider resistance RF is grounded, when it is described when divider resistance RF is corresponding be other grade of monomer electricity
The first connecting pin of Chi Shi, the divider resistance RF are connected with the control terminal of previous stage divider resistance RF, and then by multiple partial pressures
Resistance RF is sequentially connected and forms division module 40.
In some embodiments, each balanced unit 11 includes the 4th electronic switch Q4, the 5th electronic switch Q5, the 5th electricity
Hinder R5, the 6th resistance R6, the 7th resistance R7 and equalizing resistance RJ.The control terminal of the 4th electronic switch Q4 passes through described the
Five resistance R5 are connected with the control module 40, and the control terminal of the 4th electronic switch Q4 also passes through the 6th resistance R6
Ground connection；The first connecting pin of the 4th electronic switch Q4 is grounded；The second connection end of the 4th electronic switch Q4 passes through institute
It states the 7th resistance R7 and corresponding switch unit 21 to be connected, and the second connection end of the 4th electronic switch Q4 is also with described the
The control terminal of five electronic switch Q5 is connected；The first connecting pin of the 5th electronic switch Q5 is grounded by the equalizing resistance RJ
Or be connected with the second connection end of the 5th electronic switch Q5 of the balanced unit 11 of previous stage, the 5th electronic switch Q5's
Second connection end is connected with the switch unit 21.
It should be noted that the connection type of multiple balanced units 11 in present embodiment is with multiple divider resistance RF's
Connection type is similar, and details are not described herein, therefore, is sequentially connected composition balance module 10 by multiple balanced units 11.
In some embodiments, the balanced unit 11 further includes third diode D3, the third diode D3's
Anode is connected with the first connecting pin of the 5th electronic switch Q5, the cathode and the 5th electronics of the third diode D3
The second connection end of switch Q5 is connected.
Specifically, in one embodiment, the control terminal of the 4th electronic switch Q4, the first connecting pin and second connect
Connect base stage, emitter and collector that end respectively corresponds NPN type triode.The control terminal of the 5th electronic switch Q5, first
Connecting pin and second connection end respectively correspond grid, drain electrode and the source electrode of p-type metal-oxide-semiconductor field effect transistor.
It is appreciated that in other embodiments, seven resistance R7 of the 5th resistance R5~the can according to specific design and
It omits.In addition, when the corresponding first order single battery of balanced unit 11, the 4th electronic switch Q4 in balanced unit 11 can also be with
It omits, at this point, being configured to N-type metal-oxide-semiconductor field effect transistor for the 5th electronic switch Q5 is corresponding.
In addition, in one embodiment, the filter module 60 includes filter resistance RL and filter capacitor C.The filtering
The first link ends of resistance RL are connected with the switch unit 21, the second connection end of the filter resistance RL and the control mould
Block 40 is connected, and is also grounded by the filter capacitor C.
Specifically, the working principle of the battery voltage balancing circuit 100 is as follows:
When needing to detect the voltage of first order single battery, the control module 30 exports the first level signal to control
The first electronic switch Q1 conducting, so that the grid of the second electronic switch Q2 and the third electronic switch Q3 are
Low level so that the second electronic switch Q2 and the third electronic switch Q3 conducting, also that is, at this time with first order list
The corresponding switch unit 21 of body battery is connected, in the voltage output to corresponding partial pressure unit 31 of first order single battery, control
Module 40 carries out voltage acquisition by division module 40 and the voltage of corresponding single battery is calculated in foundation.And so on,
Control module 40 successively controls the corresponding switch unit 21 of other monomers battery and is connected, and the corresponding switch of other monomers battery is single
Member 21 is ended, and then realizes the detection to every level-one monomer battery voltage.In the present embodiment, the first level signal is high electricity
Ordinary mail number, it will be understood that in other embodiments, first level signal can also be low level signal, specifically, can
To be determined according to circuit design.
When control module 40 detects that the excessively high needs of certain level-one monomer battery voltage are balanced, the control module 40 is exported
First level signal controls the 4th electronic switch Q4 conducting, so that the 5th electronic switch Q5 is connected, it is corresponding
Single battery is discharged by equalizing resistance RJ, also that is, the voltage of single battery is converted into heat by corresponding equalizing resistance RJ
Consume, when control module 40 detects that corresponding single battery equilibrium finishes (voltage of balanced single battery and other
Voltage is identical), second electrical level signal is issued, so that the 5th electronic switch Q5 ends.
It should be noted that balanced unit 11 is set to switch unit 21 and partial pressure is single in the utility model embodiment
Member 31 between, when in balanced unit 11 the 4th electronic switch Q4 or the 5th electronic switch Q5 can not be turned off because of failure when, also
It can be disconnected by control switch unit 21 to prevent corresponding single battery from continuing to discharge, and then avoided because of balanced unit 11
Failure and the case where causing the electricity of single battery all to discharge, free, and protect again to more than circuit one.
Referring again to Fig. 5, an embodiment of the present invention also provides a kind of power supply device 200, and the power supply device includes
Battery voltage balancing circuit 100 described in battery pack 900 and any of the above-described embodiment.The battery pack 900 and the battery electricity
Equalizing circuit 100 is pressed to be connected to carry out Balance route to battery pack 900.
Power supply device 200 provided by the utility model, due to the battery voltage balanced using any of the above-described embodiment
Circuit 100, can be avoided the case where causing the electricity of battery module 910 all to discharge due to 11 failure of balanced unit frees, right
Circuit more one is protected again, improves safety.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications
Also it is considered as the protection scope of the utility model.
Claims (10)
1. a kind of battery voltage balancing circuit, the voltage for multiple battery modules to battery pack carries out Balance route, special
Sign is that the battery voltage balancing circuit includes:
The output end of balance module, including multiple balanced units, the multiple balanced unit and the multiple battery module is one by one
Electrical connection；
Switch module, including multiple switch unit, the multiple switch unit be electrically connected to one by one the multiple balanced unit with
Between the multiple battery module；
Control module is electrically connected with each balanced unit and each switch unit, for controlling the work of each balanced unit
The switch state of state and each switch unit；
Wherein, when the voltage of wherein one or more battery modules of the battery pack is higher than the voltage of other battery modules,
The control module controls switching means conductive connect with voltage higher battery module, and unlatching simultaneously and the voltage compared with
The balanced unit of high battery module connection, carries out Balance route with the voltage to the higher battery module of the voltage.
2. battery voltage balancing circuit as described in claim 1, which is characterized in that the balanced unit is when opening to corresponding
Battery module discharge.
3. battery voltage balancing circuit as described in claim 1, which is characterized in that the control module is used in the battery
The balance module is controlled in the charging process of group, and Balance route is carried out to the voltage of the higher battery module of voltage.
4. battery voltage balancing circuit as described in claim 1, which is characterized in that the battery voltage balancing circuit further includes
Division module, the division module include concatenated multiple partial pressure units, and wherein one end of the multiple partial pressure unit is also distinguished
It is electrically connected one by one with the output end of the multiple battery module, the multiple switch unit is also electrically connected to the multiple point one by one
It presses between unit and the multiple battery module；
The control module is also electrically connected with wherein one end of one of partial pressure unit in multiple partial pressure units, described
Control module is used to acquire the voltage of each respective battery modules by each partial pressure unit.
5. battery voltage balancing circuit as described in claim 4, which is characterized in that each partial pressure unit includes one
Divider resistance, multiple divider resistance series connection, wherein one end of each divider resistance are also electric with the output end of corresponding battery module
It connects, described wherein one end of one of divider resistance in multiple divider resistances is also electrically connected with the control module, institute
Control module is stated by controlling some switching means conductive and controlling the cut-off of other switch units, and passes through the switch with conducting
The corresponding divider resistance of unit acquires the voltage of battery module corresponding with the switch unit of conducting.
6. battery voltage balancing circuit as described in claim 4 or 5, which is characterized in that each balanced unit is electrically connected to pair
Connecting node between the switch unit answered and corresponding partial pressure unit.
7. the battery voltage balancing circuit as described in claim 1-4 any one, which is characterized in that when the control module is examined
Measure the higher battery module of the voltage voltage it is equal with the voltage of other battery modules when, control module control pair
The balanced unit answered stops working.
8. battery voltage balancing circuit as claimed in claim 5, which is characterized in that the battery voltage balancing circuit further includes
Filter module；
The filter module is connected between described wherein one end of one of partial pressure unit and the control module, is used
It is filtered in the cell voltage after division module partial pressure.
9. battery voltage balancing circuit as described in claim 1, which is characterized in that each switch unit includes the first electronic cutting
The control terminal for closing first electronic switch is connected with the control module, the first connecting pin of first electronic switch with it is right
The output end for the battery module answered is connected, and the second connection end of first electronic switch is connected with corresponding balanced unit.
10. a kind of power supply device characterized by comprising
Battery pack, the battery pack include multiple battery modules；And
Battery voltage balancing circuit described in any one of claim 1-9, the battery voltage balancing circuit and the electricity
Pond group is connected, and the voltage for multiple battery modules to the battery pack carries out Balance route.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821421490.2U CN208986621U (en) | 2018-08-30 | 2018-08-30 | Battery voltage balancing circuit and power supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821421490.2U CN208986621U (en) | 2018-08-30 | 2018-08-30 | Battery voltage balancing circuit and power supply device |
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| CN208986621U true CN208986621U (en) | 2019-06-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245198A (en) * | 2018-08-30 | 2019-01-18 | 深圳市华思旭科技有限公司 | Battery voltage balancing circuit and power supply device |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245198A (en) * | 2018-08-30 | 2019-01-18 | 深圳市华思旭科技有限公司 | Battery voltage balancing circuit and power supply device |
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