CN107359671A - A kind of space high-voltage batteries charge and discharge balancing control system and control method - Google Patents
A kind of space high-voltage batteries charge and discharge balancing control system and control method Download PDFInfo
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- CN107359671A CN107359671A CN201710719724.5A CN201710719724A CN107359671A CN 107359671 A CN107359671 A CN 107359671A CN 201710719724 A CN201710719724 A CN 201710719724A CN 107359671 A CN107359671 A CN 107359671A
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- voltage
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- battery cell
- batteries
- control system
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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
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of space high-voltage batteries charge and discharge balancing control system, the control system includes：Single battery voltage sampling circuit, it gathers the information of voltage of cell in real time；Batteries balancer, it receives the information of voltage of cell；When some battery cell electricity is more than the first power threshold in charging process, by battery cell energy transmission to whole battery pack；When some battery cell electricity is less than the second power threshold in discharge process, battery pack power is delivered to battery cell；Flyback transformer, its transmitted in both directions energy between battery cell and battery pack.The present invention disclosure satisfy that the equalization request under 800V and the high common-mode voltage of above high voltage power supply, carry the monitoring of battery cell voltage, cope with various failure situations, can reach 1mV to the sampling precision of battery cell voltage.
Description
Technical field
The present invention relates to a kind of technology of space power lithium-ions battery balancing energy in charging, discharge process, sheet
Invention is specifically related to a kind of space high-voltage batteries charge and discharge balancing control system and control method.
Background technology
Space exploration is the Disciplinary Frontiers of world today's development in science and technology, have it is very strong basic, perspective, innovative and
Drive property.Mankind's solar-system operation generally can be divided into three big field of earth applied satellite, manned space flight and survey of deep space, carry out space
Activity, it is the inevitable choice of space technology development.One of the important subsystem of power subsystem as spacecraft, it will thus provide
Aircraft performs verification experimental verification required by task energy source.Currently, with the progress of spatial overlay technology, lithium ion electric power storage
Pond group is responsible for being powered for platform load in the shade phase for task.Connected by lithium ion series connection single battery and form battery
Group, although the preferable uniformity of lithium-ions battery is can guarantee that by the control of the strict technologies such as screening, it is contemplated that battery sheet
Body self discharge effect, load flash-over characteristic and repetitive cycling requirement so that high-power lithium ion storage battery group is using
During the unbalanced of monomer voltage unavoidably occurs, if taking no action to, it is this it is unbalanced can drastically deteriorate, it is therefore right
It is significant that with high tension battery group balanced management is carried out in space.
Space batteries, when some battery cell overtension, pass through opening using passive equilibrium at present
With the switch of respective battery monomer parallel resistance, to realize the release of energy, so as to reach each battery cell energy in battery pack
The equilibrium of amount.But with the progress of space loading technology, power output and output voltage requirement to power-supply system are increasingly
Height, for lithium-ions battery energy-storage system, it is desirable to connected using more monomers, thus can be to lithium
The balanced management of ion accumulator group proposes higher requirement.At this moment substantial amounts of heat can be produced according to passive equilibrium, equalizer set
Amount, the efficiency of batteries become lower.From improve batteries power-on time, heat caused by reduction system considers, it is necessary to
Batteries are carried out with active equalization, the present invention is i.e. based on this proposition.
The content of the invention
The present invention provides a kind of space high-voltage batteries charge and discharge balancing control system and control method, realizes that high pressure stores
The high accuracy of battery voltage is balanced, and improves the speed of equilibrium, realizes the highly integrated design of system.
To achieve the above object, the present invention provides a kind of space high-voltage batteries charge and discharge balancing control system, and it is special
Point is that the control system includes：
Single battery voltage sampling circuit, it gathers the information of voltage of cell in real time；
Batteries balancer, it receives the information of voltage of the cell of single battery voltage sampling circuit output；Charging
During be more than the first power threshold when some battery cell electricity, by battery cell energy transmission to whole battery pack；Electric discharge
During be less than the second power threshold when some battery cell electricity, battery pack power is individually delivered to the battery cell；
Flyback transformer, its circuit connection batteries balancer, battery cell and battery pack, according to batteries balancer
Instruction transmitted in both directions energy between battery cell and battery pack.
The primary side connecting single batteries of above-mentioned flyback transformer, secondary connection battery pack.
Above-mentioned flyback transformer is the flyback transformer of Multiple coil, and primary side, which is provided with several and corresponded with battery cell, to be connected
The primary side winding connect, secondary are provided with a vice-side winding.
Above-mentioned single battery voltage sampling circuit uses LTC6811 chips.
Above-mentioned batteries balancer uses LTC3300 chips.
Above-mentioned control system also includes controller unit, and it receives the voltage letter of single battery voltage sampling circuit output
Breath, output operational order to batteries balancer.
A kind of control method of above-mentioned space high-voltage batteries charge and discharge balancing control system, is characterized in, the control
Method includes：
Single battery voltage sampling circuit gathers the information of voltage of battery cell；
When some battery cell electricity is more than the first power threshold in charging process, batteries balancer is by the battery cell energy
Amount is delivered to whole battery pack by flyback transformer；
When some battery cell electricity is less than the second power threshold in discharge process, batteries balancer leads to battery pack power
Cross flyback transformer and be delivered to the battery cell.
A kind of space high-voltage batteries charge and discharge balancing control system of the present invention and control method compared to the prior art,
It the advantage is that, active equalization integration module of the present invention is realized based on LTC3300 and LTC6811 chip cores, disclosure satisfy that
Equalization request under 800V and the high common-mode voltage of above high voltage power supply, carries the monitoring of battery cell voltage, copes with
Various failure situations, 1mV can be reached to the sampling precision of battery cell voltage, the present invention is applied to the storage of high-tension high-power
Battery pack balancing, self-discharge rate and rate of charge during batteries are applicable can be greatly improved；
The present invention can carry out two-way using integrated flyback transformer design, an integrated flyback transformer to 12 batteries
Active equalization, substantially improve the efficiency of Traditional Space equalizing circuit, be favorably improved the system equalization time and reduce balanced
During heat；
Circuit topology disclosed by the invention and design method are also applied for the occasion of other batteries series connection simultaneously.
Brief description of the drawings
Fig. 1 is single battery voltage sampling circuit in space high-voltage batteries charge and discharge balancing control system of the present invention
With the connection diagram of batteries balancer and 12 batteries monomers；
Fig. 2 is the connection diagram of flyback transformer and 12 batteries monomers；
Fig. 3 is that 192 string battery transformers are cross-linked figure；
Fig. 4 is the active equalization system topology schematic diagram of space high-voltage batteries charge and discharge balancing control system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the invention is further illustrated.
The present invention discloses a kind of space high-voltage batteries charge and discharge balancing control system, and the control system includes：Electric power storage
Pond monomer voltage sample circuit, batteries balancer, flyback transformer and controller unit.
Single battery voltage sampling circuit circuit connects battery, gathers the information of voltage of cell in real time.
Batteries balancer receives the information of voltage of the cell of single battery voltage sampling circuit output；Charging
During be more than the first power threshold when some battery cell electricity, by battery cell energy transmission to whole battery pack；Electric discharge
During be less than the second power threshold when some battery cell electricity, battery pack power is individually delivered to the battery cell.
Flyback transformer circuit connection batteries balancer, battery cell and battery pack, according to batteries balancer
Instruction between battery cell and battery pack transmitted in both directions energy.
Controller unit receives the information of voltage of single battery voltage sampling circuit output, output operational order to electric power storage
Pond group balancer.
As shown in figure 1, it is single battery voltage sampling circuit and the connection side of batteries balancer and battery cell
Formula.
Single battery voltage sampling circuit realizes that wherein LTC6811 is special battery pack prison by chip LTC6811
Visual organ, it can complete the measurement to 12 economize on electricity cell voltages in 290 μ s, there is two ADC, built-in ISOSPI interfaces, sampling essence
Degree enters row information by ISOSPI communications and microprocessor and exchanged up to 1mV or so.
Batteries balancer realizes that it can be protected to the over-pressed and under-voltage of batteries using chip LTC3300
Shield, the battery pack to be made up of 6 section series-connected cells, which is connected, to be designed, it is possible to achieve the efficient transfer of electric charge in battery pack.Charging
During, when some battery cell electricity is more than the first power threshold, by controlling LTC3300 sides MOSFET switch,
Battery cell energy transmission is to whole battery pack；In discharge process, when the second power threshold that some battery cell electricity is less than
When, by controlling the switch mosfet of battery pack side, battery pack power is delivered to battery cell.
As shown in figure 1, a piece of LTC6811 and two panels LTC3300 can connect 12 batteries.
As shown in Fig. 2 the connection for flyback transformer.In the present embodiment, flyback transformer is become using integrated Multiple coil
Depressor, i.e., one drags more forms, the transmission for battery energy.The direction of energy stream is：In charging process, when some list
When body electricity is excessive, by controlling LTC3300 sides MOSFET switch, battery cell energy transmission to whole battery pack；
In discharge process, when some battery cell electricity is too small, the switch of the MOSFET by controlling battery pack side, battery pack
Energy transmission is to battery cell.
The transformer for defining connecting single batteries side is primary side, and the transformer of connection batteries side is secondary, is become
The primary side of depressor is 12 windings, and the secondary of transformer is 1 winding, and an integrated flyback transformer can enter to 12 batteries
Row active equalization.
By Fig. 2 it can be seen that the secondary of transformer has two MOSFET parallel connections, when transformer secondary only has a transformation
During device, CELL11 batteries are operated, it can be seen that the MOSFET of the primary and secondary side of transformer drive signal is by two
LTC3300 is controlled, but the same time can only gate LTC3300 work, therefore two MOSFET in parallel here, unused
G2S-G6S it is floating, I2S-I6S is connected to V-.
As shown in figure 3, it is the connection of 192 string battery flyback transformers, when needs are carried out actively to the battery more than 24 string
, it is necessary to make transformer secondary output wiring interlock to realize the equilibrium of whole battery pack when balanced, while limit primary and secondary power
MOSFET breakdown voltage requirement, realizes that the encapsulation of active equalization module integrates using existing encapsulating structure housing.With 24 strings
Battery is one group, and 192 string batteries are divided into 16 groups, and it is public to have 12 batteries monomers between every group, and first battery pack is
CELL1-CELL24, second battery pack are CELL13-CELL36, and the 3rd battery pack is CELL25-CELL48, with such
Push away.
It is balanced in the group of flyback transformer：Set balanced threshold value（Second power threshold）For 20mV, with a certain batteries
Monomer is illustrated, when battery cell CELL2 electricity less than first battery pack average voltage 20mV when, close corresponding flyback and become
The secondary-side switch of depressor, first battery pack are then shut off flyback transformer secondary-side switch, control electricity to transformer secondary energy storage
Pond monomer CELL2 switch is closed, and the transmission of energy is carried out to battery cell CELL2, is switched on-off by certain duty
Than controlling.When battery cell CELL2 electricity is more than the average voltage threshold value of first battery pack（First power threshold）
During 20mV, the primary side switch of corresponding flyback transformer is closed, first battery pack is then shut off flyback to transformer primary side energy storage
Transformer primary side is switched, and the switch of first battery transformer secondary of control closes, and energy is carried out to first battery pack
Transmit.
The Homogeneity between groups of flyback transformer：Illustrated with a certain batteries monomer, battery cell CELL13 is both in first electricity
In the group of pond, also in second battery pack, similar to intermediary, energy can be transmitted between two battery packs.Due to battery
The difference of monomer manufacturing process, the average voltage of different battery packs can be caused different, when battery CELL13 voltage is less than first
The threshold value of individual battery pack or second battery pack average voltage, you can to carry out equilibrium in group accordingly.When battery CELL13's
Voltage is both less than the average voltage threshold value of first battery pack, again less than the average voltage threshold value of second battery pack, with for the moment
Between battery pack can only be allowed to carry out the transmission of energy, first can carry out the equilibrium of energy in first battery pack, meet
After voltage threshold requirement, the equilibrium of energy is then carried out in second battery pack, until CELL1-CELL36 battery cell voltages
Difference is in threshold range.When battery CELL13 voltage is both higher than the average voltage threshold value of first battery pack, again higher than the
The average voltage threshold value of two battery packs, and similarly.
As shown in figure 4, for active equalization system topology, wherein LTC6811 adopts as cell voltage monitor, LTC6811
Communicated with twin wire ISOSPI, after being changed by chip LTC6820 chips, by an isolating chip, with controller unit（I.e.
MPU）Carry out four-wire type SPI communication, wherein GPIO [3:5] can be used as SPI communication port.Compared to Fig. 1, omitted in Fig. 4
Resistance.
By LTC3300 and MOSFET combination, two-way active equalization can be carried out to cell voltage, LTC3300 may be used also
To be protected to the battery in balancing procedure, it is ensured that the safe operation of equalizing system, wherein LTC6811 and LTC3300 all may be used
To be communicated by SPI.The running of specific algorithm carries out computing by MPU, and the cell voltage collected is sent to by LTC6811
MPU is compared, and obtains operational order by MPU computings, command signal is sent to LTC3300 by MPU by SPI communication.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. a kind of space high-voltage batteries charge and discharge balancing control system, it is characterised in that the control system includes：
Single battery voltage sampling circuit, it gathers the information of voltage of cell in real time；
Batteries balancer, it receives the information of voltage of the cell of single battery voltage sampling circuit output；Charging
During be more than the first power threshold when some battery cell electricity, by battery cell energy transmission to whole battery pack；Electric discharge
During be less than the second power threshold when some battery cell electricity, battery pack power is delivered to the battery cell；
Flyback transformer, its circuit connection batteries balancer, battery cell and battery pack, according to batteries balancer
Instruction transmitted in both directions energy between battery cell and battery pack.
2. space high-voltage batteries charge and discharge balancing control system as claimed in claim 1, it is characterised in that the flyback
The primary side connecting single batteries of transformer, secondary connection battery pack.
3. space high-voltage batteries charge and discharge balancing control system as claimed in claim 1, it is characterised in that the flyback
Transformer is the flyback transformer of Multiple coil, and primary side is provided with several primary side windings to be connected one to one with battery cell, secondary
Side is provided with a vice-side winding.
4. space high-voltage batteries charge and discharge balancing control system as claimed in claim 1, it is characterised in that the electric power storage
Pond monomer voltage sample circuit uses LTC6811 chips.
5. space high-voltage batteries charge and discharge balancing control system as claimed in claim 1, it is characterised in that the electric power storage
Pond group balancer uses LTC3300 chips.
6. space high-voltage batteries charge and discharge balancing control system as claimed in claim 1, it is characterised in that the control
System also includes controller unit, and it receives the information of voltage of single battery voltage sampling circuit output, exports operational order
To batteries balancer.
7. one kind space high-voltage batteries charge and discharge balancing as described in any one claim in claim 1 to 6 controls
The control method of system, it is characterised in that the control method includes：
Single battery voltage sampling circuit gathers the information of voltage of battery cell；
When some battery cell electricity is more than the first power threshold in charging process, batteries balancer is by the battery cell energy
Amount is delivered to whole battery pack by flyback transformer；
When some battery cell electricity is less than the second power threshold in discharge process, batteries balancer leads to battery pack power
Cross flyback transformer and be individually delivered to the battery cell.
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| Application Number | Priority Date | Filing Date | Title |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710719724.5A CN107359671A (en) | 2017-08-21 | 2017-08-21 | A kind of space high-voltage batteries charge and discharge balancing control system and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270472A (en) * | 2018-12-06 | 2019-01-25 | 北京普莱德新能源电池科技有限公司 | A kind of method and device of lithium battery on-line monitoring |
| CN109765498A (en) * | 2019-03-18 | 2019-05-17 | 无锡商业职业技术学院 | A kind of electric automobile power battery active equalization experimental system and its experimental method |
| CN109980753A (en) * | 2019-05-22 | 2019-07-05 | 南阳天一航天科技有限公司 | A kind of battery management system |
| CN110829530A (en) * | 2019-11-14 | 2020-02-21 | 华中科技大学 | Battery pack performance balancing method and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202856386U (en) * | 2012-07-31 | 2013-04-03 | 刘阶萍 | Charge-discharge active equalizing smart battery module and system |
-
2017
- 2017-08-21 CN CN201710719724.5A patent/CN107359671A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202856386U (en) * | 2012-07-31 | 2013-04-03 | 刘阶萍 | Charge-discharge active equalizing smart battery module and system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270472A (en) * | 2018-12-06 | 2019-01-25 | 北京普莱德新能源电池科技有限公司 | A kind of method and device of lithium battery on-line monitoring |
| CN109765498A (en) * | 2019-03-18 | 2019-05-17 | 无锡商业职业技术学院 | A kind of electric automobile power battery active equalization experimental system and its experimental method |
| CN109765498B (en) * | 2019-03-18 | 2024-02-27 | 无锡商业职业技术学院 | Active equalization experimental system and experimental method for power battery of electric automobile |
| CN109980753A (en) * | 2019-05-22 | 2019-07-05 | 南阳天一航天科技有限公司 | A kind of battery management system |
| CN110829530A (en) * | 2019-11-14 | 2020-02-21 | 华中科技大学 | Battery pack performance balancing method and system |
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Application publication date: 20171117 |