CN106849282A - A kind of active equalization system of electrokinetic cell - Google Patents
A kind of active equalization system of electrokinetic cell Download PDFInfo
- Publication number
- CN106849282A CN106849282A CN201710242964.0A CN201710242964A CN106849282A CN 106849282 A CN106849282 A CN 106849282A CN 201710242964 A CN201710242964 A CN 201710242964A CN 106849282 A CN106849282 A CN 106849282A
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- Prior art keywords
- unit
- battery
- control unit
- cell
- driving
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
Abstract
The invention discloses a kind of active equalization system of electrokinetic cell, including several equalizing circuit plates, each battery unit of battery pack is correspondingly arranged an equalizing circuit plate, data exchange is carried out by communication network between several equalizing circuit plates, the equalizing circuit plate specifically includes battery voltage acquisition unit, communication unit, control unit, wakeup unit, driving and inversion working cell and balanced unit.It is balanced low current to be not only suitable for during present invention application, it is applied to high current again balanced, ensure electric vehicle in charging process and traveling during can realize each cell between electric quantity balancing, avoid battery capacity loss and service life problem that individual difference between cell present in series battery application process brings, it is ensured that battery pack is long-term, effectively operation.
Description
Technical field
The present invention relates to technical field of battery management, and in particular to a kind of active equalization system of electrokinetic cell.
Background technology
Battery is more and more applied as one kind of power supply in numerous areas, but cell voltage and appearance
Amount is all smaller, in order to obtain larger power capacity, several cells generally is composed in series into battery pack, to meet difference
The need for use occasion.But can cause due to there is individual difference between cell, after long-term use each cell it
Between capacity it is different, aggravate minimum capacity cell burden, so as to shorten the service life of whole battery pack.
In order to solve the problems, such as difference between each cell occurred during series battery use and bring, it is necessary to
Each cell to battery pack during battery pack use carries out power capacity equilibrium.Current equalizing system is only applicable
It is balanced in low current, the electric quantity balancing in achievable battery pack charging process between each cell, but when electric vehicle traveling
During its dynamic current it is larger when do not apply to then.
The content of the invention
The present invention provides a kind of active equalization system of electrokinetic cell, and it is equal that the existing equalizing system of solution is only applicable to low current
Weighing apparatus, can only in battery pack charging process between balanced each cell electricity problem, realize applicable to large and small electric current
Equalizing system, so that between realizing each cell in ensureing electric vehicle traveling process and in battery pack charging process
Electric quantity balancing, so as to extend the service life of battery pack.
The purpose of the present invention is mainly achieved through the following technical solutions：A kind of active equalization system of electrokinetic cell, including
Several equalizing circuit plates, each battery unit of battery pack is correspondingly arranged an equalizing circuit plate, several equalizing circuit plates
Between data exchange is carried out by communication network, the equalizing circuit plate specifically include battery voltage acquisition unit, communication unit,
Control unit, wakeup unit, driving and inversion working cell, balanced unit, wherein,
The battery voltage acquisition unit is electrically connected with battery unit, control unit, for obtaining correspondence battery unit
Information of voltage is sent to control unit；
The communication unit is electrically connected with control unit, while external communication network, for obtaining it by communication network
The information of voltage of his battery unit, and send it to control unit；
Described control unit is electrically connected with wakeup unit, driving with inversion working cell, for according to correspondence battery unit
Information of voltage and the information of voltage of other battery units export corresponding pulse signal, control drives and inversion working cell hair
The turn-on and turn-off of the drive signal for going out；
The wakeup unit is electrically connected with control unit, driving with inversion working cell, is driven and inversion work for waking up
Enter working condition as unit；
The driving is electrically connected with inversion working cell with wakeup unit, balanced unit, for driving balanced unit to work,
The driving includes pwm chip and pwm chip peripheral circuit with inversion working cell, outside the pwm chip
Enclosing circuit includes push-pull circuit；
The balanced unit is electrically connected with driving with inversion working cell, corresponding battery unit, for corresponding battery
Energy transfer and storage between unit and other battery units.The present invention is at non-working condition (inoperative and charged state)
It is stopped, to save electric energy, reduces consumable.
Further, arteries and veins of the control unit according to the voltage difference adjustment output of correspondence battery unit and other battery units
The frequency and/or dutycycle of signal are rushed, control drives the turn-on and turn-off time of the drive signal sent with inversion working cell.
Further, when driving the drive signal sent with inversion working cell to turn on, balanced unit work, electricity are driven
Shifted to corresponding battery unit.
Further, the active equalization system of electrokinetic cell, also including Auxiliary Power Units, the Auxiliary Power Units with
Driving is electrically connected with inversion working cell, for providing the operating voltage for matching with inversion working cell to drive by boosting.
Further, the active equalization system of electrokinetic cell, also including battery temperature collecting unit, the battery temperature is adopted
Collection unit and control unit and corresponding battery unit are electrically connected, the Temperature numerical for obtaining correspondingly battery unit, and by its
Send to control unit.
Further, described control unit includes AVR single chip and its corresponding peripheral circuit.
The present invention compared with prior art, has the following advantages and advantages：
A kind of active equalization system of electrokinetic cell of the present invention, is not only suitable for low current equilibrium, and suitable for big electricity
Stream is balanced, so as to ensure electric vehicle can realize that the electricity between each cell is equal in charging process and during traveling
Weighing apparatus, it is to avoid individual difference brings between cell present in series battery application process battery capacity loss and make
With life problems, it is ensured that battery pack is long-term, effectively operation.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
The active equalization system of the electrokinetic cell that Fig. 1 is provided for the embodiment of the present invention 1 is applied to the circuit structure of battery pack
Block diagram；
Fig. 2 is driving and inversion working cell, balanced unit in the first equalizing circuit plate that the embodiment of the present invention 1 is provided
Circuit diagram；
Control unit, wakeup unit and cell voltage are adopted in the first equalizing circuit plate that Fig. 3 is provided for the embodiment of the present invention 1
Collect the circuit diagram of unit；
Fig. 4 is battery discharge balanced unit circuit diagram in the first equalizing circuit plate that the embodiment of the present invention 1 is provided；
Fig. 5 is communication unit circuit diagram in the first equalizing circuit plate that the embodiment of the present invention 1 is provided；
Fig. 6 is battery temperature collecting unit circuit diagram in the first equalizing circuit plate that the embodiment of the present invention 1 is provided；
Fig. 7 is instruction element circuit figure in the first equalizing circuit plate that the embodiment of the present invention 1 is provided；
Fig. 8 is 3525 power supply unit circuit diagrams in the first equalizing circuit plate that the embodiment of the present invention 1 is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment：
As shown in figure 1, the active equalization system that Fig. 1 is the electrokinetic cell that the embodiment of the present invention 1 is provided is applied to battery pack
Circuit structure block diagram.
The voltage and capacity of cell are all smaller, in order to obtain larger power capacity, generally by several monomers electricity
Pond is composed in series battery pack, to meet different use occasions the need for.The active equalization system of electrokinetic cell described in the present embodiment
Including N number of equalizing circuit plate, N is specially the quantity of the battery unit that battery pack is included, and N is more than or equal to 2, an equalizing circuit
Plate and a battery units in parallel of battery pack, data exchange is carried out between several equalizing circuit plates by communication network.
Weighing apparatus circuit board obtains the information of voltage of other battery units by communication network.
As shown in Fig. 2~8, the present embodiment illustrates the active equalization system of electrokinetic cell by taking the first equalizing circuit plate as an example
Concrete structure.The first equalizing circuit plate of the present embodiment and the first battery units in parallel, specifically include battery voltage acquisition unit,
Communication unit, control unit, wakeup unit, driving and inversion working cell, balanced unit, wherein, battery voltage acquisition unit
One end connects battery unit, and one end connection control unit, the information of voltage for obtaining the first battery unit is sent to control unit.
The present embodiment communication unit one end connection control unit, one end connection external communication network, obtain battery pack its
The information of voltage of his battery unit.The communication unit of each equalizing circuit plate of the electrokinetic cell active equalization system is all connected with
The external communication network, each communication unit sends to communication network the voltage value of each self-corresponding battery unit, while
The voltage value of other battery units of networking is obtained by external communication network, the external communication network can use 485
Communication, CAN communication isotype.
The present embodiment control unit connection drive with inversion working cell, control unit specifically include AVR single chip and
Its peripheral circuit, control unit obtains the voltage value of the first battery unit by battery voltage acquisition unit, single by communicating
Unit obtains the voltage value of other battery units of battery pack, calculates the difference of the first battery unit and other battery cell voltage numerical value
Value, judges whether to charge the first battery unit, and battery pack major loop electricity is shifted to the first battery unit.When
First battery unit electricity is relatively low, and when judgement needs to charge the first battery unit, AVR single chip exports corresponding pulse
Signal, control drives the conducting of the drive signal sent with inversion working cell.Wherein, control unit is according to the first battery unit
With the frequency and/or dutycycle of the pulse signal of the voltage difference adjustment output of other battery units, control to drive and inversion work
The turn-on and turn-off time of the drive signal sent as unit.The present embodiment is preferred embodiment for the AVR single chip has
Body uses ATmega88 chips.
Wakeup unit one end connection control unit of the present embodiment, one end connection drives and inversion working cell, works as control
After the superior instructions system of unit sends work order, control unit control wakeup unit work, wakeup unit then wakes up driving
Enter working condition with inversion working cell.
The driving of the present embodiment is connected wakeup unit with inversion working cell, while connecting battery pack major loop, is waken up
Unit is waken up after entering working condition, i.e., the pulse signal for being exported according to control unit sends drive signal, drives balanced unit
Work, control electricity is shifted from battery pack major loop to the first battery unit.The driving is controlled with inversion working cell including PWM
Coremaking piece and its peripheral circuit, wherein pwm chip peripheral circuit include push-pull circuit, the peripheral circuit of pwm chip
It is connected with output voltage feedback unit.In the present embodiment, the pwm chip specifically uses SG3525 chips, described to recommend
Circuit includes two field-effect transistors, and the pulse signal that SG3525 chips are exported according to control unit controls two field-effect crystalline substances
The conducting shut-off of body pipe, so as to drive balanced unit to work, control electricity is shifted from battery pack major loop to the first battery unit.
Electric vehicle is all in the process of moving heavy-current discharge, and the present embodiment uses field-effect transistor, and driving current is big, is both applicable
It is balanced in low current and balanced suitable for high current, so as to ensure electric vehicle in charging process and can during traveling
Realize the electric quantity balancing between each cell.
Balanced unit one end connection of the present embodiment drives and connects the first battery unit with inversion working cell, one end,
Drive battery pack major loop electricity is shifted to the first battery unit when being worked with inversion working cell, filled to the first battery unit
Electricity.Balanced unit is provided with high frequency transformer, drives and passes through high frequency transformer with two field-effect transistors of inversion working cell
Electric energy is produced to be charged to the first battery unit.
The preferred embodiment of the present embodiment is that the first equalizing circuit plate also includes Auxiliary Power Units, accessory power supply
Unit includes 3525 power supply units and single-chip microcomputer power supply unit, and 3525 power supply units are driving and inversion working cell by boosting
The operating voltage of matching is provided.For the ease of indicating the working condition of the present embodiment, the control unit of the present embodiment to be also associated with
Indicating member.
The preferred embodiment of the present embodiment is that the first equalizing circuit plate also includes battery temperature collecting unit, battery
Temperature collecting cell one end connects the first battery unit, and connection control unit in one end obtains the Temperature numerical of the first battery unit,
And control unit is sent it to, the control unit alarm when battery temperature is too high sends shut-off order, and cut-out battery pack master returns
Road, and report to higher level's module.
The balanced unit of the present embodiment includes battery maximum euqalizing current adjustment unit, balanced benefit electric unit and battery discharge
Balanced unit, wherein, battery maximum euqalizing current adjustment unit is used to control balanced unit to provide the higher limit of electric current so that
The electric current that weighing apparatus unit is given must not exceed the current value of setting.When equilibrium mends electric unit for 3525 start-up operation, electric energy is become
For the electric energy intermediate battery supply that battery can be received, the discharge energy of battery is reduced.Battery discharge balanced unit is used to lead to
This unnecessary electric energy is fed back to the time that major loop extension battery unit reaches full value by overdischarge.
When battery pack is started working, control unit terminates resting state, and 3525 power supply units are also begun in work shape
Cell voltage is fed back to control unit by state, battery voltage acquisition unit immediately, after obtaining needing to mend electric order, opens 3525
Peripheral operating circuit allows 3525 in running order, and sending suitable pwm signal, to allow driving to be operated in inversion working cell suitable
When power.Electric energy is added in small-capacity cells group by equilibrium benefit electric unit helps power, allow it close to or up average
Value, it is to avoid its over-discharge.When charging, capacity battery less than normal can comparatively fast reach full value, at this moment be allowed by equalization discharge
It is slower to reach full value, feeds back to major loop by constantly electric discharge or this unnecessary electric energy and extends it and reaches full value
Time, so as to avoid overcharging during charging.
Technical scheme, the information of voltage of other battery units is obtained by communication unit, by cell voltage
Collecting unit obtains the information of voltage of correspondence battery unit, and be compared for the two voltage value by control unit, and output is corresponding
Pulse signal, wakeup unit wakes up to drive and enters working condition with inversion working cell, and drive signal drives according to pulse signal
Balanced unit works, and realizes the energy transfer between correspondence battery unit and other battery units, drives and inversion working cell
Push-pull circuit is provided with, therefore the active equalization system of the electrokinetic cell is not only suitable for low current equilibrium, and it is equal suitable for high current
Weighing apparatus, it is ensured that electric vehicle in charging process and traveling during can realize each cell between electric quantity balancing, it is to avoid
Individual difference brings between cell present in series battery application process battery capacity loss and service life
Problem, it is ensured that battery pack is long-term, effectively operation.Meanwhile, temperature detection can also obtain the Temperature numerical of correspondence battery unit, enter
And warning reminding can be sent when high temperature failure occur in individual cells, further increase the security of the equalizing system.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (6)
1. a kind of active equalization system of electrokinetic cell, it is characterised in that including several equalizing circuit plates, battery pack each
Battery unit is correspondingly arranged an equalizing circuit plate, and data exchange is carried out by communication network between several equalizing circuit plates,
The equalizing circuit plate specifically includes battery voltage acquisition unit, communication unit, control unit, wakeup unit, driving and inversion
Working cell, balanced unit, wherein,
The battery voltage acquisition unit is electrically connected with battery unit, control unit, the voltage for obtaining correspondence battery unit
Information is sent to control unit；
The communication unit is electrically connected with control unit, while external communication network, for obtaining other electricity by communication network
The information of voltage of pool unit, and send it to control unit；
Described control unit is electrically connected with wakeup unit, driving with inversion working cell, for the electricity according to correspondence battery unit
The information of voltage of pressure information and other battery units exports corresponding pulse signal, and control driving sends with inversion working cell
The turn-on and turn-off of drive signal；
The wakeup unit is electrically connected with control unit, driving with inversion working cell, is driven and inversion job note for waking up
Unit enters working condition；
The driving is electrically connected with inversion working cell with wakeup unit, balanced unit, described for driving balanced unit to work
Drive includes pwm chip and pwm chip peripheral circuit, pwm chip periphery electricity with inversion working cell
Road includes push-pull circuit；
The balanced unit is electrically connected with driving with inversion working cell, corresponding battery unit, for corresponding battery unit
With the energy transfer between other battery units and storage.
2. the active equalization system of electrokinetic cell according to claim 1, it is characterised in that control unit is according to correspondence electricity
The frequency and/or dutycycle of the pulse signal of the voltage difference adjustment output of pool unit and other battery units, control drive with
The turn-on and turn-off time of the drive signal that inversion working cell sends.
3. the active equalization system of electrokinetic cell according to claim 1, it is characterised in that drive and inversion working cell
When the drive signal for sending is turned on, balanced unit work is driven, electricity is shifted to corresponding battery unit.
4. the active equalization system of electrokinetic cell according to claim 1, it is characterised in that also including accessory power supply list
Unit, the Auxiliary Power Units are electrically connected with driving with inversion working cell, for being driving and inversion job note by boosting
Unit provides the operating voltage of matching.
5. the active equalization system of electrokinetic cell according to claim 1, it is characterised in that also gathered including battery temperature
Unit, the battery temperature collecting unit is electrically connected with control unit and corresponding battery unit, for obtaining correspondence battery list
The Temperature numerical of unit, and send it to control unit.
6. the active equalization system of electrokinetic cell according to claim 1, it is characterised in that described control unit includes
AVR single chip and its corresponding peripheral circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242964.0A CN106849282A (en) | 2017-04-14 | 2017-04-14 | A kind of active equalization system of electrokinetic cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710242964.0A CN106849282A (en) | 2017-04-14 | 2017-04-14 | A kind of active equalization system of electrokinetic cell |
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| CN106849282A true CN106849282A (en) | 2017-06-13 |
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| CN201710242964.0A Pending CN106849282A (en) | 2017-04-14 | 2017-04-14 | A kind of active equalization system of electrokinetic cell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233490A (en) * | 2018-03-15 | 2018-06-29 | 江苏本安环保科技有限公司 | It is a kind of that there is the energy-accumulating power station of active equalization |
| CN109274140A (en) * | 2017-07-18 | 2019-01-25 | 矢崎总业株式会社 | Battery monitoring apparatus |
| WO2019042430A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery information acquisition device, battery balancing system, vehicle, method, and storage medium |
| CN116799903A (en) * | 2023-06-16 | 2023-09-22 | 长沙联合电动科技有限公司 | Battery pack and battery replacement cabinet based on active equalization type charging management |
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| CN102496975A (en) * | 2011-11-10 | 2012-06-13 | 许春香 | Energy bus type battery equalizing circuit |
| JP2014166100A (en) * | 2013-02-27 | 2014-09-08 | Toyota Industries Corp | Voltage equalization device |
| CN205544439U (en) * | 2016-03-21 | 2016-08-31 | 南京金龙新能源汽车研究院有限公司 | Battery management system with balanced function of initiative |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496975A (en) * | 2011-11-10 | 2012-06-13 | 许春香 | Energy bus type battery equalizing circuit |
| JP2014166100A (en) * | 2013-02-27 | 2014-09-08 | Toyota Industries Corp | Voltage equalization device |
| CN205544439U (en) * | 2016-03-21 | 2016-08-31 | 南京金龙新能源汽车研究院有限公司 | Battery management system with balanced function of initiative |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274140A (en) * | 2017-07-18 | 2019-01-25 | 矢崎总业株式会社 | Battery monitoring apparatus |
| WO2019042430A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery information acquisition device, battery balancing system, vehicle, method, and storage medium |
| CN108233490A (en) * | 2018-03-15 | 2018-06-29 | 江苏本安环保科技有限公司 | It is a kind of that there is the energy-accumulating power station of active equalization |
| CN116799903A (en) * | 2023-06-16 | 2023-09-22 | 长沙联合电动科技有限公司 | Battery pack and battery replacement cabinet based on active equalization type charging management |
| CN116799903B (en) * | 2023-06-16 | 2024-03-08 | 长沙联合电动科技有限公司 | Battery pack and battery replacement cabinet based on active equalization type charging management |
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Application publication date: 20170613 |
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