CN206041528U - Balanced battery management system of initiative - Google Patents
Balanced battery management system of initiative Download PDFInfo
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- CN206041528U CN206041528U CN201620604872.3U CN201620604872U CN206041528U CN 206041528 U CN206041528 U CN 206041528U CN 201620604872 U CN201620604872 U CN 201620604872U CN 206041528 U CN206041528 U CN 206041528U
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Abstract
The utility model provides a balanced battery management system of initiative, includes host computer, CAN communication module, the host computer pass through CAN communication module, send control command to battery management system, battery management system passes through CAN communication module, to host computer transmitting data, is connected with vehicle control system, the machine that charges through CAN communication module, battery management system still be connected with voltage acquisition module, electric current collection module, temperature collection module through RS232, acquire the AD sample data of battery voltage, electric current, temperature. The utility model provides a neotype SOC computing mode has been solved prior art and has been calculated the unsafe problem of battery capacity precision. Setting up battery capacity's bound through the host computer, filling discharge current and set for, battery temperature isoparametric is effectually protected the battery, the utility model provides a novel charge mode standard, can more effectually carry out the battery and charge.
Description
Technical field
This utility model is related to New-energy electric vehicle field of lithium, is related specifically to a kind of active equalization cell tube
Reason system, it is adaptable to lithium battery equilibrium treatment.
Background technology
Increasing electric automobile, is had mainly due to lithium ion battery as main power source using lithium ion battery
Small volume, energy density are high, memory-less effect, and cycle life is high, the low advantage of self-discharge rate.
The performance and safety problem of lithium battery is controlled by BMS battery management systems.BMS battery management systems are electricity
Tie between electrical automobile and set of cells, is mainly used in battery parameter setting, battery charging and discharging management, battery balanced and battery
The display of state.
Do and the capacity of lithium battery, platform, internal resistance, self discharge etc. when the enterprise set of cells of battery PACK is matched, can be considered
Parameter；Battery in the early stage combo when relevant parameter can be controlled in certain interval（Parameter is allowed to be close to as far as possible identical）, but set of cells
Using after a period of time, between each cell, concordance just changes and (differs particularly through monomer parameter after high current charge-discharge
The problem of cause is infinitely amplified, and the set of cells various parameters later stage changes more greatly, and bucket short -board effect is more projected, and causes set of cells to be filled
Discharge capacity is more used fewer)；The mismatch of battery capacity includes charged state mismatch and capacity/energy mismatch.In two kinds of situations
Under, the total capacity of battery bag all can only achieve the capacity of most weak battery.
In order to break set of cells bucket short -board effect, prior art typically takes passive battery balanced mode, but passive battery
Equilibrium has the disadvantage that：
1, passive battery balanced efficiency comparison is low, and battery balanced speed is slow, obtains repeatedly and battery balanced can be only achieved effect.
2, high-voltage battery module electric discharge when battery balanced, off-energy, resistance heating, battery-heating cause to damage to battery
It is bad, affect battery life.
The battery balanced mode that prior art is adopted mainly adopts electric capacity, inductance, resistance to do including isolation DC-DC modes
It is battery balanced.
Capacitor batteries are balanced；That high-tension monomer is charged to electric capacity, then by electric capacity to low-voltage monomer, can be with
It is battery balanced, but effect is too poor, because capacitor charge and discharge capacity is too low every time, but also will do dipole inversion.
Inductive battery is balanced；It is high to inductive discharge to be that two neighboring monomer compares voltage, then the filling to low-voltage by inductance
Electricity, if first monomer height will be transferred to, last monomer is bad with regard to effect, although reason be it is adjacent between monomer it is poor
Different little but cumulative, the voltage differences of first monomer and last monomer are very big.
Battery is balanced, is, come equilibrium monomer voltage, to have the disadvantage necessary the ceiling voltage in set of cells by conductive discharge
Could discharge etc. there are in set of cells one or several monomers to be charged to protection voltage, the monomer of low-voltage has no idea to improve electricity
Pressure, temperature are high, and effect is also not all right.
DC-DC is battery balanced for isolation；It is that the monomer of ceiling voltage is boosted to the public mother of high voltage by isolating DC-DC module
Line, is supplied to isolation DC-DC module to do blood pressure lowering by common bus, then inputs to the monomer of minimum voltage and charge, this mode
Current range can be amplified, but the 2nd, 3,4,5 grade sub-high pressure cannot be balanced with the 2nd, 3,4,5 grade low tension battery, waits most
It is high battery balanced good with minimum, then after battery balanced other highests and minimum monomer, it may be found that original highest and
It is minimum to also need to battery balanced, so can ceaselessly shift energy in set of cells, effect nor very well, even if per a string all
Boosting is installed and DC-DC module is isolated in blood pressure lowering, size is big, high cost, and temperature is very high to be needed to do radiating treatment.
Typically can be reached 2000-3000 time or so according to the cycle-index of cell（Also more than 80% appearance
Amount）If, 1 year consider 200 times the one Battery pack life-span of circulation should in 10-15 or so, circulation primary 200-400 kilometer,
One Battery pack should more than ten thousand kilometers of 40-60, it is and even with the battery management system of above-mentioned battery balanced way, electronic
Auto vendor only promise to undertake 5 years 100000 kilometers, service life is longer, and capacity still can decline to a great extent.That is adopt above-mentioned electricity
The battery management system of the battery balanced mode in pond, Distance Theory numerical value have a long way to go, and system battery equilibrium is still reached to less than ideal
Effect, and need client to return again to producer for a period of time afterwards using lithium battery to do hand-operated battery equilibrium treatment.
The content of the invention
The purpose of this utility model seeks to the problem above for overcoming prior art to exist, and the purpose of this utility model is this
What sample was realized, a kind of active equalization battery management system, including host computer, CAN communication module, it is characterised in that：Described is upper
Position machine sends control instruction by CAN communication module to battery management system；Described battery management system passes through CAN communication
Module, to host computer transmission data, is connected with vehicle control syetem, charger by CAN communication module；Described cell tube
Reason system is also connected with voltage acquisition module, current acquisition module, temperature collect module by RS232 interfaces, obtains battery electricity
Pressure, electric current, the AD sampled datas of temperature；Using digital form, monitor in real time battery status, monitor in real time keep the standard of data
Really property, relaxes battery cell capacity, platform, internal resistance, the scope of self discharge parameter tolerance value, after set of cells use
Phase various parameters have change play the latent capacity of set of cells to greatest extent, and the deviation range of battery cell capacity is
3%-5%, platform are 100 millivolts, and internal resistance is 1-2 milliohms, and self discharge is 28 days 1 ampere-hours；Using active equalization battery management system
According to the particular capacity of the discharge and recharge of each measuring point in the set of cells for detecting, the voltage of each cell is obtained, can be accurate
To 0.1mV.
Described host computer be provided with protective current value, battery balanced current value, the battery balanced time, charging and discharging currents,
Electric discharge early warning electrical voltage system when overcharging early warning voltage, discharging when alarm temperature, the protection voltage of discharge and recharge, charging；Pass through
GPS is communicated, and all data is sent in server is preserved in real time, gathers the current status data of battery,
Show on host computer, and according to the current state of battery, judge whether to need to carry out it is battery balanced, and battery balanced result
Dynamic is presented on host computer；Described protective current value, refers to battery set charge/discharge electric current, reaches and sets in host computer
Protective current value when, that is, carry out battery protection, stop discharge and recharge；The protection voltage of described charging, early warning voltage is overcharged, be
Refer to when the current voltage that active equalization battery management system detects a certain battery of set of cells reaches and overcharges early warning voltage, enter
Row early warning；If it exceeds overcharging early warning voltage, when still providing for charging, then, when charge protection voltage is reached, system is automatic
Protection is charged, stops the charging of the single battery, carry out battery balanced, the cell voltage is declined, is evenly distributed to
On set of cells other batteries, it is battery balanced continue later to charge reach charge protection voltage until all batteries；Described electric discharge
Protection voltage, and electric discharge early warning voltage；Refer to that the current voltage of a certain battery when system detectio to set of cells as little as discharges
During early warning voltage, early warning is carried out；If less than electric discharge early warning voltage, when still providing for electric discharge, referring to ought as little as discharge prevention
During voltage, active equalization battery management system carries out discharge prevention automatically, stops the electric discharge of the single battery, carries out battery equal
Weighing apparatus, the cell voltage is risen, and equalized rear continuation electric discharge is charged to discharge prevention voltage until all batteries；Described warning temperature
Degree, refers to when the temperature of a certain battery in the set of cells that active equalization battery management system is detected reaches alarm temperature value,
The charge/discharge operation of set of cells can be automatically stopped.
User is operated manually on host computer, set of cells is carried out according to currently used situation and the needs of battery
It is balanced.
Described voltage acquisition module, during monitoring cell voltage, any group of battery open circuit failure in set of cells is found
When, less than the battery cell of average voltage 15mV, control the dead battery by energy transfer it is battery balanced from set of cells its
He is more than the high-voltage battery monomer of average voltage difference 15mV, obtains maximum compensation electric current；When discovery is when any one in set of cells
Battery pack voltage be more than average voltage when, by energy transfer release part electricity to other less than average voltage monomer.
This utility model advantage compared with prior art is as follows：
1. battery balanced efficiency high；By this utility model active equalization battery management system it is battery balanced after, battery
Electricity can reach the 90% of Full Charge Capacity, and the balancing battery management system of prior art can only achieve 60-70%, and this practicality
The almost no temperature rise of Novel work process.Parameter self-coordination balance between the monomer allowed in set of cells and monomer.Realize
The lossless synchronous transfer of active energy truly is battery balanced.Active equalization battery management system is monitored to battery
When, the scope of the parameter tolerance value such as battery cell capacity, platform, internal resistance, self discharge is relaxed, after set of cells use
Phase various parameters have change play the latent capacity of set of cells, compared with currently existing technology, battery list to greatest extent
The deviation range of body capacity, is loosened to 3%-5% by 1%, and platform is loosened to 100 millivolts by 20-50 millivolts, and internal resistance is by 0.1-0.5 millis
Europe is loosened to 1-2 milliohms, and self discharge is loosened to 28 days 1 ampere-hours by 28 days 10-20 MAHs, equal through active energy transfer battery
After weighing apparatus effect, each monomer can be fully charged to greatest extent（Battery balanced rear set of cells measurement capacity and actual capacity error
No more than 5%, it is poor with average voltage to be not more than 0.015V）, capacity and the cycle-index of set of cells is played to greatest extent, is solved
Set of cells affects the problem of battery whole group work because the Parameters variation of some monomer is big.
2. the set of cells of prior art BMS management system, after 2 years, charge/discharge capacity cannot reach regulation will
Ask, using 10--50% can be improved after this utility model active cell equalizing system or more high charge-discharge capacity, and set of cells
Capacity restoration is more to use better.
3. this utility model is by the way of active cell euqalizing current, during monitoring cell voltage, in set of cells is found
Any group of battery open circuit fails（Less than the monomer of average voltage 15mV）When, the dead battery is controlled by energy transfer battery
Equilibrium other high voltage monomers from set of cells（It is poor with average voltage to be more than 15mV）The maximum compensation electric current being obtained in that.When send out
Now when in set of cells, any a string of cell voltages are more than average voltage（It is poor with average voltage to be more than 15mV）By energy transfer
Releasing part electricity is less than the monomer of average voltage to other（Voltage difference is more than 15mV）Maximum current.
4. the battery balanced ability of this utility model is strong：Jing is tested, when the voltage of a certain Battery pack in control set of cells and electricity
When the difference of the average voltage of pond group reaches 100mV, the Battery pack is obtained in that or exports the battery balanced electric currents of 1A.Voltage difference
Bigger, battery balanced electric current is bigger, is 3A to the maximum（Control maximum, it is impossible to for unlimited high current）, moment current limliting 6A.
5. this utility model adopts digital form, monitor in real time battery status not to adopt prior art cell voltage etc.
Simulator, it is not necessary to by actual acquisition to data contrasted with simulator, monitor in real time can keep the accuracy of data.
6. host computer of the present utility model can be to protective current, battery balanced electric current, battery balanced time, discharge and recharge
Electric discharge early warning voltage when overcharging alarm voltage, electric discharge when electric current, temperature alarming, the protection voltage of discharge and recharge, charging etc. enters
Row is arranged.
7. host computer of the present utility model can show to battery types, cell constant, cycle-index, real-time voltage etc.
Show.
8. the conventional SOC computational methods of prior art, are to be changed according to the voltage curve of battery cell, compare and calculate
The capacity of battery cell, but the voltage curve of battery cell is not fixed, and with the value of voltage and current, curve chart also can
Change, so the battery capacity calculated with the voltage curve is inaccurate.
The SOC computational methods that this utility model is adopted, are discharge and recharge of the system according to each measuring point in the set of cells for detecting
Particular capacity, is calculated the voltage of each cell, can be as accurate as 0.1mV.
9. this utility model active equalization battery management system is communicated by GPS, it is possible to achieve be wirelessly transferred, by system
The battery data for detecting is preserved in being synchronized to server, and is shown in host computer.
10. set of cells can be attached across case, prior art BMS management system such as 12 passages, it is necessary to which 12 passages are complete
Portion connects, and this utility model can arbitrarily connect the passage of more than 4, without consideration order.
This utility model is effectively controlled to BMS battery management systems, effectively carry out in real time flexibly it is battery balanced,
Extend the service life of battery, this utility model can ensure that the cycle-index of cell reaches the 80% of theoretical circulation number of times,
And prior art can only ensure to reach the 50% of theoretical circulation number of times.Dependable performance, low cost, efficiency high, using lithium battery actively
Battery balanced mode, in industry opens and has reached the lossless synchronous transfer of energy and improve battery so that great current cell is balanced
The purpose of group counterbalance effect.The potential capacity of current battery, normal discharge and recharge can be recovered.It is completely superior to of the prior art
All battery management systems, are not required to do at hand-operated battery equilibrium allowing client to return again to producer for a period of time afterwards using lithium battery
Reason.Battery system management report is provided simultaneously, for each battery for being monitored and the situation of whole set of cells, there is provided system
Analysis, allows users to the continuation of the journey state of the convenient current electric automobile of understanding.The utility model proposes it is a kind of new
Charge mode standard, significantly more efficient can carry out battery charging, the standard is it has been proposed that give source appliance association of state and low speed
Electric automobile bid committee, modification formulate technical draft.
Description of the drawings
Technical solutions of the utility model are described further below in conjunction with accompanying drawing；
Fig. 1 is this utility model and the battery balanced scheme works comparison diagram of prior art；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is battery management system flow chart of steps of the present utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings；
As shown in Figure 1, the new battery of identical capacity using it is passive it is battery balanced after, battery cell capacity volume variance is brighter
Aobvious, because battery short -board effect, active volume is reduced.After using active cell equilibrium, the battery Active Compensation of high power capacity is given
The battery of low capacity, total capacity of the total capacity of set of cells than brand-new set of cells after charging reduce limited, and a battery
Battery capacity difference very little in group, has been really achieved battery balanced effect.
This utility model actively issues control command by display, and it is balanced that control battery carries out active cell.
This utility model concrete function is as follows：
1. can free initialization system password.
2. battery cell dormancy condition, such as monomer and average voltage difference scope are set, when monomer and average voltage difference scope
When reaching dormancy condition, system battery is balanced to be stopped.
3. the battery balanced time is freely set.According to the battery balanced time of setting, carry out battery balanced.
4. battery balanced electric current is set, and cut-off current carries out power-off protection according to the condition for arranging, equal according to the battery of setting
Weighing apparatus electric current is balanced to carry out system battery.
5. battery protection temperature is set, is somebody's turn to do when system detectio to certain battery cell temperature or battery pack temperature exceed
During temperature, system start-up battery protection.
6. arrange and overcharge alarming value, when battery cell voltage exceedes alarming value, system provides early warning.
7. charge protection magnitude of voltage is set, and when battery cell voltage reaches the protection magnitude of voltage, system actively carries out electricity
Pond is balanced, and the monomer voltage is declined, and compensation is gone on other batteries.
8. arrange and recover charging voltage, when the recovery charging voltage is dropped to by battery balanced monomer battery voltage,
The battery is continued to charge.
9. in charging process, carry out in charging it is battery balanced, until all cell voltages be close to protection voltage.
10. arranged and put early warning value, when battery cell voltage is less than early warning value, system provided early warning.
11. arrange Cross prevention magnitude of voltage, and when battery cell voltage reaches the protection magnitude of voltage, system actively carries out electricity
Pond is balanced, other battery capacities in set of cells is declined, is compensated on the monomer.
12. arrange recovery discharge voltage, when the recovery charging voltage is risen to by battery balanced monomer battery voltage,
Electric discharge is continued to the battery.
In 13. discharge processes while electric discharge while carry out it is battery balanced, until all cell voltages be close to protection voltage.
14. battery management systems are accurately calculated in real time, and show the current remaining capacity of set of cells（SOC is not adopted to obscure
Calculating method）.
15. battery management system intelligence computations simultaneously preserve battery set charge/discharge cycle-index.Battery management system shows electricity
The ceiling voltage of pond group, minimum voltage, average voltage, cell temperature.
16. battery management systems freely set charge and discharge protecting electric current.
17. battery management systems show set of cells current operating state；Each group of voltage can be checked simultaneously.
18. battery management systems freely set set of cells group number, it is only necessary to 4 passage batteries, you can activation system.12 passages
When, it is not necessary to 12 passages are all connected, arbitrarily connection 4 is with upper channel.
19. battery management systems can detect the working condition of multigroup battery in battery pack simultaneously, to every Battery pack group shape
State split screen display available.
20. battery management systems are provided with active cell equalizer button in host computer, when user is needed to battery balanced
When, actively to battery balanced, and just carry out when being not limited to only discharge and recharge battery balanced.
21. battery management systems adopt GB CAN communication pattern, and charger, instrumental panel to be communicated.
22. battery management systems are designed as quiescent dissipation for zero-power, offer 12V, 800mA when requiring to charge during work
Power supply, work of discharging is also required to the power supply of 12V, 800mA（Do not include that control relay closes driving current）, this utility model
When monitoring that client can not provide the power supply of 12V, 800mA, control system will enter semidormancy state with lowest power consumption.
As shown in Figure 2；A kind of active equalization battery management system, comprising host computer, CAN communication module, battery management
System, voltage acquisition module, current acquisition module, temperature collect module.
Host computer sends control instruction by CAN communication module to battery management system.
Battery management system passes through CAN communication module, to host computer transmission data, by CAN communication module and vehicle-mounted control
System processed, charger connection.
Battery management system is connected with voltage acquisition module, current acquisition module, temperature collect module by RS232 interfaces
Connect, obtain cell voltage, electric current, the AD sampled datas of temperature.
As shown in Figure 3；
This utility model battery management system is comprised the steps of：
Step 1：Activation system.
Step 2：Into system initialization module, respectively to depositor unblock, I/0 initialization modules, peripheral hardware initialization mould
Block, power down storage chip initialization module, initialization of (a) serial ports module, AD sampling initialization modules, intervalometer initialization are grasped
Make；
Step 3：Reading last time preservation battery information, such as battery types, temperature, charging capacity, discharge capacity, circulate secondary
Number, cell voltage coefficient can be checked history discharge and recharge, battery balanced record and save as file；
Step 4：AD reference value acquisition modules:The sampled data on AD reference value acquisition modules is read, is recorded during system compensation
Enter；
Step 5：Battery protection module：Monitor the battery capacity of each battery cell, and the temperature on battery cell；Root
According to battery temperature information, judge whether to need to carry out battery protection；
Step 6：According to each monomer current voltage of set of cells, if certain monomer voltage is excessive, step 7 is put into electric
Pond balance module carries out discharge battery equilibrium treatment；If no voltage is excessive, into step 8；
Step 7：Battery balanced module：By Digital Circuit Control, the capacity point of the battery of average voltage is will be above automatically
Flow in the battery less than average voltage；Simultaneously discharge and recharge setting can be individually carried out to certain battery, other in set of cells
Battery is unaffected.Except by monitor battery present case carry out automatically it is battery balanced in addition to, electricity can also be set manually
Pond is balanced.During battery balanced, the state of the current all batteries of BMS battery management systems monitor in real time, and in screen display
Module is shown；
Step 8：When certain monomer voltage it is too low, then into step 7, the battery balanced process being charged；Otherwise enter
Step 9；
Step 9：Using residual capacity is calculated, the residual capacity and current battery of set of cells each battery cell are calculated
Total battery capacity；
Step 10：The real-time battery status condition that user is monitored according to active equalization battery management system in step 9, handss
It is dynamic to decide whether to carry out battery balanced, each battery capacity of set of cells is intended to unanimously；Carry out battery balanced, enter
Step 7, is not carried out battery balanced then into step 5；The current capacities of each battery cell enter in real time in screen display module
Row shows.
This utility model active equalization battery management system is charged using stair step current, so as to avoid charger or charging pile
Start impact of the instantaneous large-current to battery.
1）First stage arranges 15 seconds charging intervals, and charging current is 5A.
2）Second stage arranges 5 seconds charging intervals, and charging current is 10A.
3）After second stage, every five seconds for example increases 5A, and final stage electric current rises to the charging current of setting by that analogy.
4), when charging to 0.05V before setting protection voltage, the electric current of every liter of 0.01V drop 1/5 charges to protection voltage x current
It is zero.
5) battery balanced recovery charging voltage, starts to charge up electric current for 1/5（Set the 1/5 of battery balanced electric current）Often walk
Enter once, the time is 5 seconds.
Below by embodiment, the battery balanced experiment effect of this utility model is described in detail；
This example 1：
8 batteries are selected, set of cells is constituted, is measured through circuit tester, 8 economize on electricity tankages are respectively from 1-8 batteries
2.50V, 2.92V, 3.30V, 3.29V, 3.13V, 3.53V,
3.75V,3.28V.The charge protection voltage for setting as 3.75V, discharge prevention voltage be 2.50V, battery balanced electricity
Flow for 6A, protective current 25A, charging current 6A, recovery charging voltage 3.65V, recovery discharge voltage 2.8V, battery balanced time
1 hour.
When unused this utility model battery management system carries out battery balanced, charge protection is set by charging/discharging apparatus
Voltage is 3.75V, and set of cells is charged, and is measured by circuit tester, and set of cells each cell does not change, because
No. 7 battery, itself has been filled with, and causes the battery connected charge.
When unused this utility model battery management system carries out battery equilibrium, arranged by charging/discharging apparatus and discharged
Protection voltage is 2.5V, and set of cells is discharged, and is measured by circuit tester, and set of cells each cell does not change,
Because No. 1 battery, itself has arrived minimum electric discharge, causes the battery connected discharge.
Being charged using this utility model battery management system, it is battery balanced to carry out simultaneously, and No. 7 full cell voltages decline, remaining
7 cell voltages rise, wherein No. 1 battery, because battery is minimum, the compensation obtained from No. 7 batteries is maximum, and voltage rises most
Hurry up.When No. 7 cell voltages are down to 3.65V, No. 7 batteries are started to charge up, and proceed battery full of rear battery management system equal
Weighing apparatus.Now, because other seven batteries pass through long period charging, and the voltage difference of No. 7 batteries reduces, battery balanced
Effect not substantially, 8 batteries it is continuous charge, it is battery balanced overcharge, voltage difference further reduces each other, Jing Guoban
Hour it is battery balanced after, 8 economize on electricity tankages, be followed successively by 3.74V, 3.74V, 3.73V, 3.75V, 3.74V from No. 1-8,
3.75V,3.75V,3.75V.8 batteries are close to and are full of.During battery management system counts the charging process simultaneously, set of cells is obtained
The all capacity for obtaining, are shown in host computer.
Then, set of cells is discharged, No. 1 battery is first close to 2.50V discharge prevention voltages, battery management system battery
Balanced to start, current average voltage is 3.01V, and No. 1 cell voltage rises, and the cell voltage decline for being less than 3.01V slows down, because
Be battery capacity supplement higher than 3.01V to power less than average voltage battery, but battery still provides for electric discharge.When No. 1 battery reaches
To 2.8V recovery discharge voltage when, No. 1 battery starts electric discharge, and voltage declines.Through 20 minutes battery balanced time, 8 economize on electricitys
Cell voltage tends to 2.5V.After discharge process terminates, battery management system record circulating battery number of times is 1, is shown on host computer
Show.Open the preservation file in host computer, pack total capacities, battery current before and after file record discharge and recharge, cell
The information such as capacity.
Claims (5)
1. a kind of active equalization battery management system, including host computer, CAN communication module, it is characterised in that：Described host computer
By CAN communication module, control instruction is sent to battery management system；Described battery management system passes through CAN communication module,
To host computer transmission data, it is connected with vehicle control syetem, charger by CAN communication module；Described battery management system
Also it is connected with voltage acquisition module, current acquisition module, temperature collect module by RS232 interfaces, obtains cell voltage, electricity
Stream, the AD sampled datas of temperature；Using digital form, monitor in real time battery status, monitor in real time keep the accuracy of data,
Allow battery cell capacity, single lithium battery voltage platform, lithium battery monomer internal resistance, lithium battery monomer capacity self discharge parameter
The scope of deviation is relaxed, and has change play the latent of set of cells to greatest extent including set of cells using later stage various parameters
In capacity, the deviation range of battery cell capacity is 3%-5%, and single lithium battery voltage platform is 100 millivolts, in lithium battery monomer
Hinder for 1-2 milliohms, the self discharge of lithium battery monomer capacity is 28 days 1 ampere-hours；Using active equalization battery management system according to detection
To set of cells in each measuring point discharge and recharge particular capacity, obtain the voltage of each cell, 0.1mV can be accurate to.
2. a kind of active equalization battery management system according to claim 1, it is characterised in that：Described host computer is arranged
There is the protection electricity of protective current value, battery balanced current value, battery balanced time, charging and discharging currents, alarm temperature, discharge and recharge
Electric discharge early warning electrical voltage system when overcharging early warning voltage, discharging when pressure, charging；Communicated by GPS, in real time all
Data are preserved in being sent to server, gather the current status data of battery, are shown on host computer, and according to battery
Current state, judge whether to need to carry out battery balanced, and battery balanced result dynamic presented on host computer；Institute
The protective current value stated, refers to battery set charge/discharge electric current, reaches in the protective current value of host computer setting, that is, carries out battery
Protection, stops discharge and recharge；The protection voltage of described charging, early warning voltage is overcharged, referred to when active equalization battery management system
The current voltage for detecting a certain battery of set of cells is reached when overcharging early warning voltage, carries out early warning；If it exceeds overcharging
Early warning voltage, when still providing for charging, then, when charge protection voltage is reached, system is charged protection automatically, stops this single
The charging of battery, carries out battery balanced, and the cell voltage is declined, and is evenly distributed on set of cells other batteries, and battery is equal
Continue to charge after weighing apparatus charge protection voltage is reached until all batteries；Described discharge prevention voltage, and electric discharge early warning electricity
Pressure；Refer to a certain battery when system detectio to set of cells current voltage as little as discharge early warning voltage when, carry out early warning；
If less than electric discharge early warning voltage, when still providing for electric discharge, referred to when as little as discharge prevention voltage, active equalization battery management system
System carries out discharge prevention automatically, stops the electric discharge of the single battery, carries out battery balanced, and the cell voltage is risen, equalized
Continue electric discharge afterwards until all batteries are charged to discharge prevention voltage；Described alarm temperature, refers to when active equalization battery management
System detectio to set of cells in the temperature of a certain battery reach alarm temperature value when, the charge and discharge electrician of set of cells can be automatically stopped
Make.
3. a kind of active equalization battery management system according to claim 1 and 2, it is characterised in that：Described host computer
Battery types, cell constant, cycle-index, real-time voltage can be shown；Described cycle-index, can make cell
Cycle-index reaches the 80% of theoretical circulation number of times, and user is carried out on host computer according to currently used situation and the needs of battery
Manual operation, carries out equilibrium to set of cells.
4. a kind of active equalization battery management system according to claim 1, it is characterised in that：Described battery management system
System is one electronics clear passage of connection on set of cells is per group, monitors the voltage per all monomers in Battery pack group, monitoring
When all monomers of average voltage 15mV are more than, control monomer can release electricity automatically, and can stay the surplus of 15mV；Monitor
Less than the monomer of average voltage 15mV, monomer absorption electricity can be controlled, not unnecessary charging can stay the surplus of 15mV, Er Qie electricity
Pressure reduction it is bigger absorption and release electric current it is bigger, energy transfer it is battery balanced to voltage difference be less than 15mV auto sleeps；Work as control
When in set of cells, the difference of the average voltage of the voltage of a certain Battery pack and set of cells reaches 100mV, the Battery pack is obtained in that
Or the battery balanced electric currents of output 1A；Voltage difference is bigger, and battery balanced electric current is bigger, is 3A, moment current limliting 6A to the maximum；It is described
It is battery balanced after, battery electric quantity can reach the 90% of Full Charge Capacity.
5. a kind of active equalization battery management system according to claim 1, it is characterised in that：Set of cells can be entered across case
Row connection, only need to arbitrarily connect the passage of more than 4, without consideration order.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100022A (en) * | 2016-06-20 | 2016-11-09 | 江苏瀚海芯云网络科技有限公司 | Active equalization battery management system |
| CN113629810A (en) * | 2021-08-10 | 2021-11-09 | 湖北亿纬动力有限公司 | Battery management system matching method and device |
| CN114013300A (en) * | 2021-12-06 | 2022-02-08 | 国网智慧能源交通技术创新中心(苏州)有限公司 | Power supply system |
| CN114583781A (en) * | 2022-02-22 | 2022-06-03 | 深圳市嘉锂智控科技有限公司 | Battery operation control-based battery charging and discharging protection method and battery management system |
| CN115848222A (en) * | 2022-12-21 | 2023-03-28 | 南通泰平同人电子科技有限公司 | Battery management system |
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2016
- 2016-06-20 CN CN201620604872.3U patent/CN206041528U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100022A (en) * | 2016-06-20 | 2016-11-09 | 江苏瀚海芯云网络科技有限公司 | Active equalization battery management system |
| CN113629810A (en) * | 2021-08-10 | 2021-11-09 | 湖北亿纬动力有限公司 | Battery management system matching method and device |
| CN113629810B (en) * | 2021-08-10 | 2023-09-01 | 湖北亿纬动力有限公司 | Battery management system matching method and device |
| CN114013300A (en) * | 2021-12-06 | 2022-02-08 | 国网智慧能源交通技术创新中心(苏州)有限公司 | Power supply system |
| CN114583781A (en) * | 2022-02-22 | 2022-06-03 | 深圳市嘉锂智控科技有限公司 | Battery operation control-based battery charging and discharging protection method and battery management system |
| CN114583781B (en) * | 2022-02-22 | 2024-04-26 | 深圳市嘉锂智控科技有限公司 | Battery charge and discharge protection method based on battery operation control and battery management system |
| CN115848222A (en) * | 2022-12-21 | 2023-03-28 | 南通泰平同人电子科技有限公司 | Battery management system |
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