CN106602668B - A kind of battery management system and management method of two-way full-time electric quantity balancing - Google Patents
A kind of battery management system and management method of two-way full-time electric quantity balancing Download PDFInfo
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- CN106602668B CN106602668B CN201710042900.6A CN201710042900A CN106602668B CN 106602668 B CN106602668 B CN 106602668B CN 201710042900 A CN201710042900 A CN 201710042900A CN 106602668 B CN106602668 B CN 106602668B
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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
-
- 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
-
- 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
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- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses the battery management system and management method of a kind of two-way full-time electric quantity balancing, the system comprises: sampling module, main control module, for controlling the work of each functional module, according to the state of battery pack, the opportunity of equilibrium calculation is selected, it is balanced synchronous to being carried out from control unit；From control unit, for after the calculating equalization command for receiving main control module sending, starting sampling module work to judge whether there is the battery for needing to carry out electric quantity balancing, stops the work of sampling module, sends Balance route order.Harness of the present invention is simple, and sampling harness and balanced harness are time sharing shared, and cell arrangements are convenient, substantially increase equalization efficiency, save system cost.
Description
Technical field
The present invention relates to solar power silicon core cleaning, drying apparatus fields, more particularly to a kind of electricity of two-way full-time electric quantity balancing
Pond management system and management method.
Background technique
Monomer voltage sampling is the most basic function of battery management system, and battery management system passes through sampling battery voltage,
Data are analyzed and processed, and then realize the defencive function of battery；It can be said that monomer voltage sampling functions are management systems
Most of function on basis, management system is all built upon on this basis；When battery after a period of use, due to battery
Manufacturing process generates inconsistent, causes battery to generate the inconsistent of remaining capacity, needs through charge/discharge both of which weighing apparatus side
Battery more than electricity, is released certain electricity by formula, and the few battery of electricity is charged into certain electricity, so that whole group battery be made to protect
Consistency is held, the utilization rate of battery is improved；
Lithium battery is due to manufacture material, the difference of the production factors such as production technology, and it is inconsistent to show as ohmic internal resistance, causes
It is had differences from power consumption；Electricity sorting is carried out before battery factory, charging error leads to initial quantity of electricity difference；Battery use process
In cause the electricity for being charged into or releasing variant since temperature is unbalanced；After a period of use, polarization phenomena lead to electricity to battery
The ability that pond receives energy is broken up, in conjunction with all of above factor, when multiple batteries are connected in use, since electricity is different
It causes, and battery has using section, during the charging process, the high battery of electricity can reach overcharge a little first, need to stop to fill
Electricity, during discharge, the low battery of electricity reach over-discharge point first, need to stop to discharge；Therefore in entire charge and discharge process
In, the high battery of electricity and electricity it is low battery difference electricity can not just utilize；Therefore, management system is necessary when electric quantity balancing
The important function of one kind.
Generally there are two types of modes for existing battery capacity equilibrium at present, first is that it is passively balanced, pass through one small resistance of parallel connection
The battery high to electricity carries out power consumption, achievees the effect that equilibrium, and advantage is reliably that the disadvantage is that electric current is small, effect is unobvious, passes through
Fever consumes energy, influences the service efficiency of electric energy, and fever will increase the heat burden of system；Another way is actively equal
Weighing apparatus, by the high battery of electricity to vehicle-mounted level " charging ", the vehicle-mounted level battery " charging " low to electricity reaches balanced mesh
's；Advantage is to remove the influence of efficiency by energy transfer, and energy does not lose, and electric current is typically designed bigger, and effect is bright
It is aobvious；Disadvantage realizes that such scheme needs to design a switch arrays, and each battery can pass through switch selection and other electricity
Pond parallel charge-discharge (multi-to-multi), and so more switches once fails, it is more likely that generate short circuit；High current shifts energy,
A set of balanced harness must be increased, harness and balanced harness is sampled for distinguishing, prevent sampling error, and made using two sets of harness
It is excessively high to obtain system cost.
Summary of the invention
The purpose of the present invention is in view of the above-mentioned drawbacks of the prior art, providing a kind of electricity of two-way full-time electric quantity balancing
Pond management system and management method.
The battery management system of two-way full-time electric quantity balancing provided by the invention includes:
Sampling module, the voltage for each single battery of scan round sampling battery group within the sampling time；
Main control module, for controlling the work of each functional module, according to the state of battery pack, select equilibrium calculation when
Machine, it is balanced synchronous to being carried out from control module, and error correction is carried out to system according to mechanism for correcting errors；
From control module, for after the calculating equalization command for receiving main control module sending, starting sampling module to work, root
The residual voltage of each single battery sampled according to sampling module judges whether it needs to carry out electric quantity balancing, and if it exists, then right
The single battery for needing to carry out electric quantity balancing carries out the division of active/passive equilibrium, and calculates the position of the single battery, according to one
Fixed computing mechanism calculates the time that each single battery needs to carry out charge/discharge equilibrium, stops the work of sampling module, sends
Balance route order；
Active equalization module, for basis from the Balance route order of module is controlled to by being divided into active equalization from control module
The battery in section carries out active equalization；
Passive equilibrium execution module, for basis from the Balance route order of module is controlled to by being divided into passively from control module
The battery of Equilibrium Interval carries out passive balanced.
It is described from control module further include each single battery of dynamic memory remaining time for balance；After the reset from control module,
If not receiving new calculating equalization command, the time for balance of last computation is obtained, continues to complete the equalization task of last time, if connecing
It receives new calculating equalization command and then executes calculating equalization task.
The opportunity of the main control module selection equilibrium calculation included: battery sufficient standing up to one hour, and polarization phenomena are to electricity
After the influence factor of cell voltage is eliminated；Or booting pressure difference is very big, and under no equilibrium state, battery standing 5min or more, electricity
When pressure difference being pressed to be more than certain value；Or without under equilibrium state, charge/discharge is in plateau and continues for some time.
It is described to calculate the computing mechanism for the time that each single battery needs to carry out charge/discharge equilibrium from control module and include:
Linear interpolation calculating is carried out according to the time for balance table of comparisons of the cell voltage table of comparisons and different voltages platform, obtains each battery
Need to carry out the time of charge/discharge equilibrium.
The mechanism for correcting errors includes: that main control module generates log to the operation conditions of system, when a certain batteries warp of discovery
When the short of electricity or electricity overfill of perseverance, and from when controlling the equilibrium calculation algorithm of module there is no to the galvanic action, this is reported
When the position of battery, communication link carry out charge/discharge to the battery and control error correction, resetting or the certain equilibrium of the preset battery
Between.
The mechanism for correcting errors further include: main control module finds that in charge or discharge, the monomer of battery pack ceiling voltage is electric
The pressure difference of the single battery of pond and minimum voltage is greater than certain threshold value, and system charges to ceiling voltage, to minimum voltage into
Row electric discharge, then report the position of the battery, and communication link carries out charge/discharge to the battery and controls error correction, resetting or the preset electricity
The certain time for balance in pond.
The mechanism for correcting errors further include: main control module discovery system have battery occur capacity attenuation it is bigger when, report
When the position of the battery, communication link carry out charge/discharge to the battery and control error correction, resetting or the certain equilibrium of the preset battery
Between.
The active equalization includes that the high single battery of electricity charges to vehicle-mounted level, the vehicle-mounted level monomer low to electricity
Battery charging；The passive equilibrium includes consuming it to the battery in the high battery both ends of an electricity small resistance in parallel
Electricity.
The present invention also provides a kind of battery management methods of two-way full-time electric quantity balancing, including Balance route:
Step S100: the state of battery pack is detected；
Step S110: judging whether the opportunity for reaching equilibrium calculation according to the state of battery pack, carries out if reaching next
Step, otherwise return step S100；
Step S120: the voltage of each single battery of scan round sampling battery group；
Step S130: the residual voltage of each single battery sampled according to sampling module judges whether it needs to carry out electricity
Amount is balanced, if there is single battery to need to carry out electric quantity balancing, carries out next step, otherwise return step S100；
Step S140: the division of active/passive equilibrium is carried out to the single battery for needing to carry out electric quantity balancing, and calculates the list
The position of body battery calculates the time that each single battery needs to carry out charge/discharge equilibrium according to certain computing mechanism；
Step S150: stopping the work of sampling module, sends Balance route order, start active equalization and/or it is passive
Weighing apparatus.
Wherein, the opportunity of equilibrium calculation included: battery sufficient standing up to one hour in step S110, and polarization phenomena are to battery
After the influence factor of voltage is eliminated；Or booting pressure difference is very big, and under no equilibrium state, battery standing 5min or more, voltage
When pressure difference is more than certain value；Or without under equilibrium state, charge/discharge is in plateau and continues for some time；
In step S140, when the computing mechanism includes: the equilibrium according to the cell voltage table of comparisons and different voltages platform
Between the table of comparisons carry out linear interpolation calculating, obtain the time that each battery needs to carry out charge/discharge equilibrium；
In step S150, the active equalization includes that the high single battery of electricity charges to vehicle-mounted level, vehicle-mounted level to
The low single battery charging of electricity；The passive equilibrium includes keeping its right in the high battery both ends of an electricity small resistance in parallel
The battery carries out power consumption.
The method also includes false detections:
Step S200: the voltage and charge/discharge state of detection each single battery of battery pack estimate the capacity of each single battery
Decaying；Log is generated to the operation conditions of system；
Step S210: when detecting a certain section single battery regular short of electricity or electricity overfill, and equilibrium calculation is calculated
When method is there is no to the galvanic action；Or in charge or discharge, the single battery of battery pack ceiling voltage and minimum voltage
The pressure difference of single battery is greater than certain threshold value, and system charges to ceiling voltage, discharges minimum voltage；Or it detects
Have single battery occur capacity attenuation it is bigger when；Next step is then carried out, otherwise return step S200；
Step S220: reporting fault battery location, communication link carry out charge/discharge to the fail battery and control error correction, weight
It sets or time for balance that the preset fail battery is certain.
Compared with prior art, harness of the present invention is simple, and sampling harness and balanced harness are time sharing shared, cell arrangements side
Just, cost is saved.Using the passive balanced and medium current active equalization of low current, switch arrays are reduced, reliability is improved.It is a variety of
Computing mechanism calculates battery capacity, using electricity as balanced unique foundation, is ok within the most of the time that battery uses
Equilibrium substantially increases equalization efficiency.
Detailed description of the invention
Fig. 1 is the functional block diagram of battery management system of the present invention；
Fig. 2 is the flow chart of battery management method Balance route of the present invention；
Fig. 3 is the flow chart of battery management method false detection of the present invention；
Fig. 4 is of the invention from control module Balance route flow chart；
Fig. 5 is of the invention from control module time for balance control flow chart；
Fig. 6 is of the invention from control module equilibrium calculation control flow chart；
Fig. 7 is the balanced opportunity control flow chart of main control module of the present invention.
Specific embodiment
Invention is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the battery management system of two-way full-time electric quantity balancing provided by the invention includes: sampling module, use
In the voltage of scan round sampling each single battery of power battery pack within the sampling time；Main control module, for controlling each function
The work of module selects the opportunity of equilibrium calculation according to the state of battery pack, balanced synchronous to carrying out from control module, and according to
Mechanism for correcting errors carries out error correction to system；From control module, for starting after the calculating equalization command for receiving main control module sending
Sampling module work, it is equal that the residual voltage of each single battery sampled according to sampling module judges whether it needs to carry out electricity
Weighing apparatus, and if it exists, then carry out the division of active/passive equilibrium to the single battery for needing to carry out electric quantity balancing, and calculate monomer electricity
The position in pond calculates the time that each single battery needs to carry out charge/discharge equilibrium according to certain computing mechanism, stops sampling
The work of module sends Balance route order；Active equalization module, for according to from control module Balance route order to by from
The battery that control module is divided into active equalization section carries out active equalization；Passive equilibrium execution module is used for basis from control module
Balance route order the battery by being divided into passive Equilibrium Interval from control module is carried out it is passive balanced.
It wherein, further include the remaining time for balance of each single battery of dynamic memory from control module；After the reset from control module,
If not receiving new calculating equalization command, the time for balance of last computation is obtained, continues to complete the equalization task of last time, if connecing
It receives new calculating equalization command and then executes calculating equalization task.
The opportunity of main control module selection equilibrium calculation included: battery sufficient standing up to one hour, and polarization phenomena are to battery electricity
After the influence factor of pressure is eliminated；Or booting pressure difference is very big, and under no equilibrium state, battery standing 5min or more, voltage pressure
When difference is more than certain value；Or without under equilibrium state, charge/discharge is in plateau and continues for some time.
From control module calculate the time that each single battery needs to carry out charge/discharge equilibrium computing mechanism include: according to
The time for balance table of comparisons of the cell voltage table of comparisons and different voltages platform carries out linear interpolation calculating, obtains each battery needs
Carry out the time of charge/discharge equilibrium.
Mechanism for correcting errors includes: that main control module generates log to the operation conditions of system, when a certain batteries of discovery are regular
Short of electricity or electricity overfill when, and from control module equilibrium calculation algorithm there is no to the galvanic action when, report the battery
Position, communication link carries out charge/discharge to the battery and controls error correction, resetting or the certain time for balance of the preset battery.
Mechanism for correcting errors further include: main control module find in charge or discharge, the single battery of battery pack ceiling voltage and
The pressure difference of the single battery of minimum voltage is greater than certain threshold value, and system charges to ceiling voltage, puts to minimum voltage
Electricity, then report the position of the battery, and communication link carries out charge/discharge to the battery and controls error correction, resetting or the preset battery one
Fixed time for balance.
Mechanism for correcting errors further include: main control module discovery system have battery occur capacity attenuation it is bigger when, report the electricity
The position in pond, communication link carry out charge/discharge to the battery and control error correction, resetting or the certain time for balance of the preset battery.
Active equalization execution module further includes switch matrix and the constant flow module for stabling current.Active equalization it is specific
Implementation method is to design a switch arrays as shown in Figure 1, and each battery can pass through switch selection and other batteries
Parallel charge-discharge achievees the purpose that equilibrium.In the present embodiment, the real-time mode of active equalization be the high single battery of electricity to
Vehicle-mounted level charging, the vehicle-mounted level single battery charging low to electricity, wherein battery pack passes through a DC/DC conversion module pair
The flat shifting savings of vehicle mounted electric.
Passive equilibrium includes so that it is carried out power consumption to the battery in the high battery both ends of an electricity small resistance in parallel.
It is specific to wrap the present invention also provides a kind of battery management method of two-way full-time electric quantity balancing, including Balance route
Include following steps:
Step S100: the state of battery pack is detected；
Step S110: judging whether the opportunity for reaching equilibrium calculation according to the state of battery pack, carries out if reaching next
Step, otherwise return step 100；
Step S120: the voltage of each single battery of scan round sampling battery group；
Step S130: the residual voltage of each single battery sampled according to sampling module judges whether it needs to carry out electricity
Amount is balanced, if there is single battery to need to carry out electric quantity balancing, carries out next step, otherwise return step S100；
Step S140: the division of active/passive equilibrium is carried out to the single battery for needing to carry out electric quantity balancing, and calculates the list
The position of body battery calculates the time that each single battery needs to carry out charge/discharge equilibrium according to certain computing mechanism；
Step S150: stopping the work of sampling module, sends Balance route order, start active equalization and/or it is passive
Weighing apparatus.
Wherein, the opportunity of equilibrium calculation included: battery sufficient standing up to one hour in step S110, and polarization phenomena are to battery
After the influence factor of voltage is eliminated；Or booting pressure difference is very big, and under no equilibrium state, battery standing 5min or more, voltage
When pressure difference is more than certain value；Or without under equilibrium state, charge/discharge is in plateau and continues for some time；
In step S140, when the computing mechanism includes: the equilibrium according to the cell voltage table of comparisons and different voltages platform
Between the table of comparisons carry out linear interpolation calculating, obtain the time that each battery needs to carry out charge/discharge equilibrium；
In step S150, the active equalization includes that the high single battery of electricity charges to vehicle-mounted level, vehicle-mounted level to
The low single battery charging of electricity；The passive equilibrium includes keeping its right in the high battery both ends of an electricity small resistance in parallel
The battery carries out power consumption.
False detection:
Step S200: the voltage and charge/discharge state of detection each single battery of battery pack estimate the capacity of each single battery
Decaying；Log is generated to the operation conditions of system；
Step S210: when detecting a certain section single battery regular short of electricity or electricity overfill, and equilibrium calculation is calculated
When method is there is no to the galvanic action；Or in charge or discharge, the single battery of battery pack ceiling voltage and minimum voltage
The pressure difference of single battery is greater than certain threshold value, and system charges to ceiling voltage, discharges minimum voltage；Or it detects
Have single battery occur capacity attenuation it is bigger when；Next step is then carried out, otherwise return step S200；
Step S220: reporting fault battery location, communication link carry out charge/discharge to the fail battery and control error correction, weight
It sets or time for balance that the preset fail battery is certain.
In system, from control module Balance route process specifically includes the following steps:
Step S300: initiation parameter；
Step S310: each single battery last time remaining time for balance is read；
Step S320: the position of charge balancing and equalization discharge is calculated；
Step S330: the single battery for judging whether there is discharge/charge equilibrium locations needs equilibrium, if then carrying out in next step
Suddenly, S360 is otherwise gone to step；
Step S340: charge/discharge Balance route program is called to carry out electric quantity balancing to battery pack；
Step S350: judging to call whether charge/discharge Balance route program reaches 200ms, if then carrying out next step,
Otherwise return step S340；
Step S360: voltage sample program is called to carry out voltage scanning sampling.
From control module time for balance control specifically includes the following steps:
Step S400: initiation parameter；
Step S410: each battery last time remaining time for balance is read；
Step S420:10s counts primary；
Step S430: judging whether system is carrying out electric quantity balancing, if then carrying out next step, otherwise continues to count
Number；
Step S440: time for balance subtracts 10s and saves certainly.
From control module equilibrium calculation control specifically includes the following steps:
Step S500: initiation parameter；
Step S510: waiting system bus is interrupted, and obtains the calculating equalization command that master control issues；
Step S520: under the cell voltage low mode that is switched on, step S530 is executed；Under the cell voltage height mode that is switched on,
Execute step S540；In battery standby, charging is steady, discharges under steady mode, executes step S550；
Step S530: according to actual pressure differential, the battery of the ratio of cell voltage and battery Full Charge Capacity in 50% ~ 100% section
For equalization discharge, battery of the ratio of cell voltage and battery Full Charge Capacity in 0% ~ 45% section is used for charge balancing, according to electricity
Cell voltage low mode is tabled look-up obtains the time for balance of charging and discharging respectively；Execute step S560；
Step S540: according to actual pressure differential, the battery of the ratio of cell voltage and battery Full Charge Capacity in 50% ~ 100% section
For equalization discharge, battery of the ratio of cell voltage and battery Full Charge Capacity in 0% ~ 45% section is used for charge balancing, according to OCV
Voltage height mode is tabled look-up obtains the time for balance of charging and discharging respectively；Execute step S560；
Step S550: according to actual pressure differential, the battery of the ratio of cell voltage and battery Full Charge Capacity in 50% ~ 100% section
For equalization discharge, is tabled look-up according to steady schema and obtain the time for balance of charging and discharging respectively；Execute step S560；
Step S560: more new record time for balance.
Main control module equilibrium opportunity control specifically includes the following steps:
Step S600: initial configuration parameter；
Step S610: maximum/minimum voltage, electric current, the parameters such as available machine time are read；
Step S620: battery standing 1 hour, turning back on, if ratio < 35% of 0 < cell voltage and the battery Full Charge Capacity,
And pressure difference is greater than preset threshold, then goes to step S630；
It battery standing 1 hour, turns back on, if ratio < 50% of 35 < cell voltage and the battery Full Charge Capacity, and pressure difference
Greater than preset threshold, then S640 is gone to step；
It battery standing 1 hour, turns back on, if pressure difference is greater than 100mV；Or when battery standing 5min or steady charging
Between reach 30S, and pressure difference is greater than given threshold；Go to step S650；
Step S630: booting cell voltage low mode is issued, S660 is gone to step；
Step S640: booting cell voltage height mode is issued, S660 is gone to step；
Step S650: even running mode is issued, S660 is gone to step；
Step S660: the feedback signal for the functional module being respectively carrying out is waited；
Step S670: judging whether to receive all feedback signals, if then terminating, otherwise continues waiting for receiving feedback letter
Number.
Harness of the present invention is simple, and sampling harness and balanced harness are time sharing shared, and cell arrangements are convenient, save cost.Using
The passive balanced and medium current active equalization of low current, reduces switch arrays, improves reliability.A variety of computing mechanisms calculate battery
Electricity can be balanced within the most of the time that battery uses using electricity as balanced unique foundation, substantially increases
Weigh efficiency.
Above-described embodiment is merely to illustrate a specific embodiment of the invention.It should be pointed out that for the general of this field
For logical technical staff, without departing from the inventive concept of the premise, several deformations and variation can also be made, these deformations and
Variation all should belong to protection scope of the present invention.
Claims (9)
1. a kind of battery management system of two-way full-time electric quantity balancing characterized by comprising
Sampling module, the voltage for each single battery of scan round sampling battery group within the sampling time；
Main control module, according to the state of battery pack, selects the opportunity of equilibrium calculation for controlling the work of each functional module, to
It is synchronous that equilibrium is carried out from control module, and error correction is carried out to system according to mechanism for correcting errors；
From control module, for after the calculating equalization command for receiving main control module sending, starting sampling module work, according to adopting
The residual voltage for each single battery that egf block samples judges whether it needs to carry out electric quantity balancing, and if it exists, then to needs
The single battery for carrying out electric quantity balancing carries out the division of active/passive equilibrium, and calculates the position of the single battery, according to certain
Computing mechanism calculates the time that each single battery needs to carry out charge/discharge equilibrium, stops the work of sampling module, sends balanced
Control command；It further include the remaining time for balance of each single battery of dynamic memory from control module；After the reset from control module, if not
New calculating equalization command is received, the time for balance of last computation is obtained, continues to complete the equalization task of last time, if receiving
New calculating equalization command then executes calculating equalization task；
Active equalization module, for basis from the Balance route order of module is controlled to by being divided into active equalization section from control module
Battery carry out active equalization；
Passive equilibrium execution module, for basis from the Balance route order of module is controlled to by being divided into passive equilibrium from control module
The battery in section carries out passive balanced.
2. the battery management system of two-way full-time electric quantity balancing as described in claim 1, which is characterized in that the main control module
The opportunity for selecting equilibrium calculation included: battery sufficient standing up to one hour, and polarization phenomena obtain the influence factor of cell voltage
After elimination；Or booting pressure difference is very big, and under no equilibrium state, battery standing 5min or more, when voltage difference is more than certain value；Or
Without under equilibrium state, charge/discharge is in plateau and continues for some time.
3. the battery management system of two-way full-time electric quantity balancing as described in claim 1, which is characterized in that described from control module
Calculate the time that each single battery needs to carry out charge/discharge equilibrium computing mechanism include: according to the cell voltage table of comparisons and
The time for balance table of comparisons of different voltages platform carries out linear interpolation calculating, obtain each battery need to carry out charge/discharge it is equal
The time of weighing apparatus.
4. the battery management system of two-way full-time electric quantity balancing as described in claim 1, which is characterized in that the mechanism for correcting errors
It include: that main control module generates log to the operation conditions of system, when a certain batteries of discovery regular short of electricity or electricity mistake
Man Shi, and from when controlling the equilibrium calculation algorithm of module there is no to the galvanic action, report the position of the battery, communication link pair
The battery carries out charge/discharge and controls error correction, resetting or the certain time for balance of the preset battery.
5. the battery management system of two-way full-time electric quantity balancing as described in claim 1, which is characterized in that the mechanism for correcting errors
Further include: main control module finds that in charge or discharge, the single battery of battery pack ceiling voltage and the monomer of minimum voltage are electric
The pressure difference in pond is greater than certain threshold value, and system charges to ceiling voltage, discharges minimum voltage, then reports the battery
Position, communication link carry out charge/discharge to the battery and control error correction, resetting or the certain time for balance of the preset battery.
6. the battery management system of two-way full-time electric quantity balancing as described in claim 1, which is characterized in that the mechanism for correcting errors
Further include: main control module discovery system have battery occur capacity attenuation it is bigger when, report the position of the battery, communication link
Charge/discharge is carried out to the battery and controls error correction, resetting or the certain time for balance of the preset battery.
7. the battery management system of two-way full-time electric quantity balancing as described in claim 1, which is characterized in that the active equalization
It charges including the high single battery of electricity to vehicle-mounted level, the single battery charging low to electricity of vehicle-mounted level；It is described passive equal
Weighing apparatus includes so that it is carried out power consumption to the battery in the high battery both ends of an electricity small resistance in parallel.
8. a kind of battery management method of two-way full-time electric quantity balancing characterized by comprising
Step S100: the state of battery pack is detected；
Step S110: judging whether the opportunity for reaching equilibrium calculation according to the state of battery pack, and next step is carried out if reaching,
Otherwise return step S100；
Step S120: the voltage of each single battery of scan round sampling battery group；
Step S130: it is equal that the residual voltage of each single battery sampled according to sampling module judges whether it needs to carry out electricity
Weighing apparatus, if there is single battery to need to carry out electric quantity balancing, carries out next step, otherwise return step S100；
Step S140: carrying out the division of active/passive equilibrium to the single battery for needing to carry out electric quantity balancing, and calculates monomer electricity
The position in pond calculates the time that each single battery needs to carry out charge/discharge equilibrium according to certain computing mechanism；
Step S150: stopping the work of sampling module, sends Balance route order, starts active equalization and/or passive equilibrium；
Wherein, the opportunity of equilibrium calculation included: battery sufficient standing up to one hour in step S110, and polarization phenomena are to cell voltage
Influence factor be eliminated after；Or booting pressure difference is very big, and under no equilibrium state, battery standing 5min or more, voltage difference
When more than certain value；Or without under equilibrium state, charge/discharge is in plateau and continues for some time；
In step S140, the computing mechanism includes: the time for balance pair according to the cell voltage table of comparisons and different voltages platform
Linear interpolation calculating is carried out according to table, obtains the time that each battery needs to carry out charge/discharge equilibrium；
In step S150, the active equalization includes that the high single battery of electricity charges to vehicle-mounted level, and vehicle-mounted level is to electricity
Low single battery charging；The passive equilibrium includes making it to the electricity in the high battery both ends of an electricity small resistance in parallel
Pond carries out power consumption.
9. the battery management method of two-way full-time electric quantity balancing as claimed in claim 8, which is characterized in that the method is also wrapped
Include false detection:
Step S200: the voltage and charge/discharge state of detection each single battery of battery pack estimate that the capacity of each single battery declines
Subtract；Log is generated to the operation conditions of system；
Step S210: when detecting a certain section single battery regular short of electricity or electricity overfill, and equilibrium calculation algorithm is simultaneously
When not to the galvanic action；Or in charge or discharge, the single battery of battery pack ceiling voltage and the monomer of minimum voltage
The pressure difference of battery is greater than certain threshold value, and system charges to ceiling voltage, discharges minimum voltage；Or list is detected
When body battery generation capacity attenuation is bigger；Next step is then carried out, otherwise return step S200；
Step S220: reporting fault battery location, communication link to the fail battery carry out charge/discharge control error correction, resetting or
The certain time for balance of the preset fail battery.
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| CN109435772B (en) * | 2017-08-31 | 2020-12-25 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
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