CN106160034B - A kind of battery balanced control device and method - Google Patents
A kind of battery balanced control device and method Download PDFInfo
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- CN106160034B CN106160034B CN201510142065.4A CN201510142065A CN106160034B CN 106160034 B CN106160034 B CN 106160034B CN 201510142065 A CN201510142065 A CN 201510142065A CN 106160034 B CN106160034 B CN 106160034B
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Abstract
The invention discloses a kind of battery balanced control device, described device includes master control borad and from control plate, wherein the master control borad includes main Balance route unit, it is described from control plate include voltage acquisition unit, from Balance route unit and discharge cell.When the master control borad with when the board communications mistake from control described in from the slave Balance route unit control corresponding discharge cell realization veneer Balance route on control plate.The invention also discloses a kind of battery balanced control methods, execute step comprising battery information acquisition step, system equalization order generation step, veneer equalization command generation step and equalization command.Battery balanced control device and method of the invention not only more comprehensively considers the actual conditions of battery cell during carrying out battery balanced, also counter-measure is constructed based on a variety of fortuitous events, to realize safer effective battery balanced control, more preferably battery balanced control effect is reached.
Description
Technical field
The present invention relates to electrical equipment and electrical engineering field, a kind of battery balanced control device and side are in particulard relate to
Method.
Background technique
Power lithium-ion battery in use, to improve its voltage platform and increasing capacity, uses in series and parallel more
Multiple battery cells are formed battery modules by method.Battery list after the charge and discharge cycles of certain number, in battery modules
There is the inconsistent situation of voltage in cognition, so as to cause charge and discharge electrical anomaly.Such as some battery cell prematurely reaches in charging
Blanking voltage causes whole group battery that can not be further continued for charging.It is final to influence battery modules capacity and service life.
In the prior art, the inconsistent feelings of the voltage for generalling use cell balancing to solve above-mentioned battery cell
Condition.Lithium ion battery balancing technique is mainly divided to two kinds at present, active equalization and passively equilibrium.Active equalization is turned using energy mostly
The higher battery capacity of monomer voltage is transferred in the lower battery of monomer voltage by the method for shifting.This method structure is more
Complexity, efficiency is lower, higher cost, is not easy to realize.Passive equilibrium is then the lookup higher monomer of monomer voltage, is discharged it,
Reach the consistent purpose of monomer voltage.This method structure is simple, and cost is relatively low, easy to accomplish, and reliability is also higher.
However passive Balance route strategy in the prior art is relatively simple, and voltage is only higher than to the battery of a certain threshold values
Monomer electric discharge, do not fully considered in the selection of threshold values not only the actual conditions of battery cell and also in balancing procedure not yet
In view of generation of certain special circumstances, such as excess temperature, communication loss etc..
Therefore, the problem relatively simple for passive Balance route strategy in the prior art needs a kind of new battery
Equalising control device and method are to reach more preferably battery balanced control effect.
Summary of the invention
For the relatively simple problem of passive Balance route strategy in the prior art, the present invention provides a kind of battery is equal
Weigh control device, described device include master control borad and from control plate, in which:
Described to include voltage acquisition unit from control plate, the voltage acquisition unit is connected with battery cell, to obtain simultaneously
Export the monomer voltage of the battery cell；
The master control borad includes main Balance route unit, all from control plate in the main Balance route unit and described device
On voltage acquisition unit be connected, to receive the monomer voltage and based on the monomer voltage output system equalization command；
It is described from control plate also include from Balance route unit, it is described from Balance route unit be located at it is same from control plate
The voltage acquisition unit and the main Balance route unit are connected, and are used in the master control borad with described from control board communications mistake
It mistakes and veneer equalization command is exported based on the monomer voltage；
It is described from control plate also include discharge cell, the discharge cell be located at it is same from control plate on the voltage acquisition
Unit, it is described be connected from Balance route unit and the corresponding battery cell, for based on the system equalization order or
The veneer equalization command carries out discharge operation to the battery cell.
In one embodiment, the system/veneer equalization command includes equalizing voltage, the master/slave Balance route unit
Comprising equalizing voltage calculator, the equalizing voltage calculator is used for the list received according to the master/slave Balance route unit
Bulk voltage calculates according to ad hoc rules and exports the equalizing voltage.
In one embodiment, the master/slave equalizing voltage calculator includes:
First voltage screening washer, for being screened from all monomer voltages that the master/slave Balance route unit receives
Source is in the monomer voltage in normal acquisition voltage range；
Second voltage screening washer is connected with the first voltage screening washer, for the first voltage screening washer
Postsearch screening is done in output, when the number of voltages of the monomer voltage in normal acquisition voltage range is greater than particular value,
Remove the highest monomer voltage of numerical value from the monomer voltage in normal acquisition voltage range and numerical value is minimum
Monomer voltage simultaneously exports the remaining monomer voltage；
Average calculator is connected with the second voltage screening washer, for calculating and exporting the second voltage screening
The average value of the monomer voltage of device output, the average value are the equalizing voltage.
In one embodiment, described device also includes temperature collecting cell, the temperature collecting cell for obtain and it is defeated
Out in the monomer temperature and/or described device of the battery cell specific components temperature.
In one embodiment, described device also includes battery status judging unit, is used to judge and export the battery
The charging and discharging state of monomer.
In one embodiment, described device also includes interactive module, and the interactive module includes operating unit, the operation
Unit and the master control borad and/or it is described be connected from control plate, for according to the corresponding Balance route order of user's operation output from
And control the master control borad and/or the detailed operation mode from control plate.
In one embodiment, the interactive module also includes display unit, and the display unit is for collecting and showing institute
State the relevant information of device.
The present invention also provides a kind of battery balanced control method, the method is comprised the steps of:
Battery information acquisition step obtains the battery information for being connected to the battery cell of battery balanced control device, described
Battery information includes the monomer voltage of the battery cell；
System equalization order generation step generates simultaneously output system equalization command based on the monomer voltage got；
Veneer equalization command generation step, when master control borad in the battery balanced control device and from control plate between communication
When mistake occurs, accordingly generates from the monomer voltage of the battery cell on control plate based on being connected to and export veneer equalization command；
Equalization command executes step, based on the system equalization order or the veneer equalization command to corresponding battery list
Body executes discharge operation.
In one embodiment, the battery information also includes battery temperature and/or battery charging condition, in the system
In equalization command generation step or the veneer equalization command generation step, it is based on corresponding battery temperature and/or battery charge and discharge
Electricity condition generates and exports the system equalization order or veneer equalization command.
In one embodiment, the method further includes balanced mode setting procedure, are set according to the specific requirements of user
The operating mode of the battery balanced control device, thus raw in the system equalization order generation step or veneer equalization command
The corresponding system equalization order or the veneer equalization command are generated based on the specific operating mode in step.
Compared with prior art, the present invention has the advantage that
Battery balanced control device and method of the invention is not only more comprehensive during carrying out battery balanced
The actual conditions of battery cell are considered, also counter-measure is constructed based on a variety of fortuitous events, more pacifies to realize
Complete effective battery balanced control, has reached more preferably battery balanced control effect.
Other feature or advantage of the invention will illustrate in the following description.Also, Partial Feature of the invention or
Advantage will be become apparent by specification, or be appreciated that by implementing the present invention.The purpose of the present invention and part
Advantage can be realized or be obtained by step specifically noted in the specification, claims and drawings.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is system structure schematic diagram according to an embodiment of the invention；
Fig. 2 is execution flow chart according to an embodiment of the invention.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, implementation personnel of the invention whereby
Can fully understand that how the invention applies technical means to solve technical problems, and reach technical effect realization process and according to
The present invention is embodied according to above-mentioned realization process.As long as each embodiment it should be noted that do not constitute conflict, in the present invention
And each feature in each embodiment can be combined with each other, be formed by technical solution protection scope of the present invention it
It is interior.
In order to obtain more preferably battery balanced control effect.The invention discloses a kind of battery balanced control device,
Battery balanced control device of the invention (discharges to the higher monomer of voltage, makes whole group battery using passive balance policy
Voltage reaches unanimity, to reduce the battery capacity rate of decay, prolongs the service life) and use master slave and distributed structure.
Battery balanced control device of the invention include master control borad and from control plate.The electricity being connected thereto is collected from control plate
The information of pond monomer is simultaneously exported to master control borad, and master control borad generates and sends corresponding balanced life based on the information being collected into from control plate
It enables and achievees the purpose that battery balanced control to from control plate to execute discharge operation to corresponding battery cell.
As shown in Figure 1, the device of the present embodiment includes master control borad 120 and is connected to 2 of master control borad 120 from control plate
130 and 140.It is connected to battery cell 101,102 and 103 from control plate 130, is connected to battery cell 104,105 from control plate 140
And 106.
What needs to be explained here is that in the present embodiment, device includes 2 from control plate, 3 batteries each are connected from control plate
Monomer.But in the device of the invention from control plate and battery cell not limited in this.In the same apparatus, master control borad can
It is one or more from control plate to be connected to, each it may be coupled to one or more battery monomer from control plate.Master control borad connection
The number of number and the battery cell connected from control plate from control plate is actually needed by user and specific hardware environment is determined
It is fixed.
The working principle of the device of the present embodiment is that the battery cell to voltage in battery cell more than specific threshold carries out
Electric discharge, to achieve the purpose that Balance route.It in order to achieve the above objectives, include voltage acquisition unit 134 from control plate 130 (140)
(144).Voltage acquisition unit 134 (144) is connected with battery cell 101,102 and 103 (104,105 and 106), for obtaining
Take the monomer voltage of battery cell.
Master control borad 120 includes main Balance route unit 122, and voltage acquisition unit 134 and 144 is connected to main Balance route
The monomer voltage of unit 122 and the battery cell that will acquire is output to main Balance route unit 122.Main Balance route unit
122 generate simultaneously output system equalization command according to the monomer voltage of all battery cells received.In the present embodiment, system
Equalization command includes equalizer switch order and equalizing voltage.
It include discharge cell 133 (143) from control plate 130 (140).Discharge cell 133 (143) is connected to voltage acquisition unit
On 134 (144) and corresponding battery cell 101,102,103 (104,105,106).Discharge cell 133 (143) is based on coming from
The system equalization order of main Balance route unit 122 carries out discharge operation to corresponding battery cell.
In the present embodiment, switch controller is being based on from the discharge cell 133 (143) in control plate 130 (140) and is being put
Resistance building.Discharge resistance is connected by gathering line and control switch with battery cell.Control switch can be by switch controller
Control on-off.Battery cell is discharged by discharge resistance when control switch is connected, and control switch is not discharged when disconnecting.To prevent from putting
Electric resistance heating amount is excessive, when the battery cell number of balanced discharge is greater than a certain special value to same simultaneously from control plate
(being set as 6 in the present embodiment) takes the highest given number of monomer voltage then to needing balanced monomer voltage to sort by height
(being set as 6 in the present embodiment) battery cell carry out equalization discharge.
In the present embodiment, the system equalization order that main Balance route unit 122 generates is for all from control in system
What plate issued.Master control borad 120 sends system to from control plate 130 and 140 with a certain period of time (for 500 milliseconds in the present embodiment)
System equalization command.In actual use, master control borad 120 and from control plate 130 (140) between exist there is a situation where communication mistakes.
Battery balanced operation cannot be normally executed from control plate (130 or 140) accordingly at this time, to cause cell voltage uneven
Weighing apparatus.
In the present embodiment, communication mistake mainly considers following several situations:
1) system equalization order is lost, i.e., one or more not receive system equalization order from control plate；
2) system equalization order mistake, i.e., from the system equalization order that receives of control plate be it is wrong (format not exclusively with
Cause can not execute)
For above situation, in order to minimize influence of the communication mistake to battery balanced control.The device of the present embodiment
Set both of which weighing apparatus mode, system equalization mode and veneer balanced mode.When device operates normally, device is in system
Balanced mode, i.e., it is all to receive system equalization order from control plate and execute corresponding discharge operation.When generating system equilibrium is ordered
It enables loss or system equalization badcommand mistake, (does not receive system equalization order from control plate accordingly or receive error system
Equalization command from control plate) enter veneer balanced mode, the carry out discharge operation autonomous to the battery cell being connected thereto.
In the present embodiment, when from control plate be more than specific duration (being set as 5 seconds in the present embodiment) be not received by system
It is considered as system equalization order loss when equalization command.When from control plate (be set as 5 seconds in the present embodiment) always in specific duration
The system equalization order for receiving mistake makes to be considered as system equalization order mistake.
It is to be herein pointed out when from control plate be sent to master control borad single battery information occur mistake or can not will
When single battery information is sent to master control borad.The master control borad of the present embodiment will not send system equalization order to accordingly from control
Plate is considered as the case where system equalization order is lost at this time.
In order to realize veneer balanced mode, the present embodiment includes from Balance route unit 132 from plate 130 (140) are controlled
(142), from Balance route unit 132 (142) and main Balance route unit 122, discharge cell 133 (143) and voltage acquisition
Unit 134 (144) is connected.When generating system equalization command is not lost and system equalization order is without mistake, from control plate
Slave Balance route unit the system equalization order received is transmitted to corresponding discharge cell.When generating system equalization command
It loses or system equalization badcommand is mistaken, accordingly from the slave Balance route unit on control plate based on the same voltage from control plate
The monomer voltage that acquisition unit obtains generates veneer equalization command.
Similar system equalization command, veneer equalization command also include equalizer switch order and equalizing voltage.Discharge cell
After 133 (143) receive veneer equalization command, when the equalizer switch order in veneer equalization command is to open, discharge cell base
In same from control plate on voltage acquisition unit 134 (144) it is collected it is all be connected to this from control plate battery cell 101,
The monomer voltage of 102 and 103 (104,105 and 106), to the battery of the equalizing voltage in had more than veneer equalization command
Monomer discharges until it reaches equalizing voltage.
In the normal use of battery in (charge and discharge process) and the balancing procedure of battery, battery cell can generate heat.No
Indigestibility, battery cell overheat the failure that will cause entire battery system.In order to avoid battery cell from overheating as far as possible, the present embodiment
Device construct monitoring temperature.It is more than that a certain specific threshold (is set as 50 to take the photograph in the present embodiment in the temperature of battery cell
Family name's degree) when do not execute discharge operation.
In order to realize that monitoring temperature, the device of the present embodiment include temperature collecting cell 160.Temperature collecting cell 160 connects
It is connected to main Balance route unit 122, monitor the temperature of all battery cells connecting with device and is sent to temperature data
Main Balance route unit 122.Main Balance route unit 122 generates phase according to specific balance policy based on the temperature data of acquisition
The system equalization order answered.It is specific to the present embodiment, when the temperature of battery cell is more than specific threshold, main Balance route
The equalizer switch order in system equalization order that unit 122 generates is set to off.
In order to which monitoring temperature also may be implemented in veneer balanced mode, the temperature collecting cell 160 of the present embodiment also connects
Every piece is connected to from the slave Balance route unit (132 and 142) of control plate (130 and 140).So that any from control plate
(130 or 140) enter available to corresponding battery cell temperature when veneer balanced mode.When the temperature of battery cell is more than
When a certain specific threshold, it is arranged to from the equalizer switch order in the slave equalization command that Balance route unit 132 or 142 generates
It closes.
In the present embodiment, in order to simplify internal system topology layout, temperature collecting cell 160 is divided for multiple portions,
A part of temperature collecting cell 160 is each constructed from control plate.Each it is connected to from the temperature collecting cell monitoring on control plate
This from control plate battery cell temperature.
In the present embodiment, from the switch control of voltage acquisition unit, temperature collecting cell and discharge cell on control plate
Device processed utilizes power management chip to construct.I.e. every piece includes a power management chip from control plate, in power management chip
Construct the switch controller from voltage acquisition unit, temperature collecting cell and the discharge cell controlled on plate.
In view of in actual use, can also generate heat from the power management chip on control plate.In order to avoid electricity as far as possible
Source control chip overheating, in the present embodiment, the temperature collecting cell each constructed from the power management chip on control plate is also
Monitor the temperature of the power management chip of itself.When the temperature of power management chip is more than a certain specific threshold (in the present embodiment
In be set as 85 degrees Celsius) when, the equalizer switch order in master/slave equalization command that master/slave Balance route unit generates is set
It is set to pass.
Charging, electric discharge and vacant, the battery of normal work is generally one in above three state, certain specific
In applicable cases, need to consider the state of battery when executing equalization operation.It such as is to be not necessarily to when battery is in discharge condition
Execute battery balanced (electric discharge) operation.
In view of above situation, the device of the present embodiment also includes battery status judging unit 150, is used to judge and defeated
The charging and discharging state of battery cell out.In the present embodiment, battery status judging unit 150 is connected to main Balance route unit
122 and each from Balance route unit (132 or 142).Main Balance route unit 122 and from Balance route unit (132
Or 142) corresponding master/slave equalization command is exported (by equalizer switch based on the battery status from battery status judging unit 150
Order is set on or off).
Battery status judging unit 150 in the present embodiment is constructed based on Hall current sensor, passes through current acquisition
Judge present battery charging and discharging state, just when same state duration is greater than specific time (being 10 seconds in the present embodiment)
It is confirmed as the state, otherwise it is assumed that being that original state is constant.
In the present embodiment, equalizer switch order of the discharge cell 133 (143) in master/slave equalization command is set on
When, discharge operation is carried out based on the equalizing voltage in master/slave equalization command.Specifically, discharge cell 133 (143) is based on voltage
Acquisition unit 134 and the monomer voltage of 144 collected all battery cells (101,102,103,104,105 and 106),
It discharges the battery cell of had more than equalizing voltage special value (being set as 100 millivolts in the present embodiment) until its list
Bulk voltage reaches equalizing voltage.
Discharge operation is that purpose is that the voltage of the battery cell more than equalizing voltage is dropped to equalizing voltage to realize electricity
The equalization operation of cell voltage.Therefore the value of equalizing voltage directly influences final battery balanced effect.It is ideal in order to reach
Portfolio effect, present invention employs special equalizing voltage calculation methods, comprising the following steps:
It is filtered out from the monomer voltage for generating the corresponding battery cell of system/veneer equalization command in normal
Monomer voltage in acquisition voltage range (0-5 volt)；
When the number of voltages of the monomer voltage in normal acquisition voltage range is greater than particular value (taking 5 in the present embodiment)
When, remove the highest monomer voltage of numerical value and the minimum list of numerical value from the monomer voltage in the normal acquisition voltage range
Bulk voltage and the average value for calculating remaining monomer voltage, finally defining the average value got is equalizing voltage.
In order to realize the acquisition of above-mentioned equalizing voltage, the master (122) of the present embodiment/from (132,142) Balance route unit
Include equalizing voltage calculator.Equalizing voltage calculator be used for according to master (122)/from (132,142) Balance route unit receive
To monomer voltage calculated according to above-mentioned ad hoc rules and export equalizing voltage.
In the present embodiment, equalizing voltage calculator includes:
First voltage screening washer, for all monomers from master (122)/received from (132,142) Balance route unit
The monomer voltage in normal acquisition voltage range is filtered out in voltage；
Second voltage screening washer is connected with first voltage screening washer, does two for the output to first voltage screening washer
Secondary screening is normally adopted when the number of voltages of the monomer voltage in normal acquisition voltage range is greater than particular value from being in
Remove the highest monomer voltage of numerical value and the minimum monomer voltage of numerical value in monomer voltage within the scope of collecting voltage and exports surplus
Under monomer voltage；
Average calculator is connected with second voltage screening washer, for calculating and exporting the output of second voltage screening washer
The average value of monomer voltage, this average value are equalizing voltage.
In order to adapt to the different needs of user, the device of the present embodiment is configured to need to adjust itself based on user
Balanced mode.To realize this function, the device of the present embodiment includes interactive module 110.Interactive module 110 includes that operation is single
Member 112, operating unit 112 is with master control borad 120 (main Balance route unit 122) and from control plate 130 and 140 (from Balance route
Unit 132 and 142) it is connected, for exporting corresponding Balance route order according to user's operation to control 120 He of master control borad
From the detailed operation mode of control plate 130 and 140.In the present embodiment, detailed operation mode includes: with battery cell temperature pair
The threshold value answered；Threshold value corresponding with power management chip temperature；And equilibrium state setting corresponding with battery charging condition
(whether can carry out equalization operation in the case where battery is in charge/discharge/blank state).
Operating unit 112 can also directly control the switch of master control borad 120 and the balanced mode from control plate 130 and 140.
Such as directly setting system equalization mode is closed, then system/veneer equalization command that master/slave Balance route unit generates at this time
In equalizer switch order be set to off.
In the present embodiment, master control borad 120 and between control plate 130 and 140, master control borad 120 and interactive module 110 it
Between, from control plate 130 and 140 and interactive module 110 between be Controller Area Network BUS (Controller Area
Network, CAN) communication.Of course, being simplied system structure in other embodiments of the present invention, operating unit 112 can also be only
It is connected to master control borad 120 or indirect mode is taken to be connected to from control plate 130 and 140.
It is to be herein pointed out the equalizer switch order in system/veneer equalization command in the present embodiment is can be with
Immediate updating.I.e. system can change equalizer switch order in time according to the actual situation to which discharge module be immediately controlled.Example
Such as when discharge module is carrying out discharge operation, change can be passed through if power management chip or battery cell overheat
Equalizer switch order terminates the discharge operation of discharge module at once.
In order to realize a variety of detailed operation modes of the device of the invention.The present embodiment master control borad 120, from control plate
The memory 121,131 and 141 for saving operating mode is configured in 130 and 140.Memory 121,131 and 141
It is connected respectively with main Balance route unit 122, from Balance route unit 132 and 142, so that storage comes from operating unit 112
Balance route order.Main Balance route unit 122, when being worked normally from Balance route unit 132 and 142 from memory
121, corresponding Balance route order is read in 131 and 141.
When needing to change system operating mode, memory 121,131 and 141 can be stored by operating unit 112
Balance route order modify.Operating unit 112 send Balance route order to main Balance route unit 122, from equilibrium
Control unit 132 and 142.Main Balance route unit 122 receives Balance route order from Balance route unit 132 and 142
Memory 121,131 and 141 is written into Balance route order afterwards.
To prevent writing process from malfunctioning, the parameter will be re-read after the completion of write-in, compared with receiving information, if they are the same
Success is then written, otherwise write-in failure.When failure is written, master/slave Balance route unit is attempted to carry out to be written for the second time, if also
Success is not written, then stops write activity.Main Balance route unit 122 will most terminate from Balance route unit 132 and 142
Fruit is reported to interactive module 110.If be written simultaneously successfully, according to new mode of operation, fail if being written, continue by
Former operating mode operation.
Autonomous operation state can be entered after the operating mode of device has been set, interactive module 110 can close at this time
It closes.In other embodiments of the invention, fixation can be set in constructing apparatus from control plate and master control borad in system
Operating mode, so that interactive module can not be constructed in a device.
For the ease of user's operation, interactive module 110 also includes display unit 111.Display unit 111 in the present embodiment
It is connected with the main Balance route unit 122 in master control borad 120.It is collected and the relevant information of display device.In the present embodiment,
Above-mentioned relevant information includes information (monomer voltage, battery cell/power management chip for being connected to all battery cells of device
Temperature or battery status), it is master/slave control plate balanced mode state (balanced mode open/close state, equalizing voltage or temperature threshold
Value).
To sum up, battery balanced control device of the invention consideration not only more comprehensive during carrying out battery balanced
The actual conditions of battery cell have been arrived, have also constructed counter-measure based on a variety of fortuitous events, so that realizing safer has
The battery balanced control of effect, has reached more preferably battery balanced control effect.
Based on the device of the invention, the invention also provides a kind of battery balanced control methods.Below with reference to the present embodiment
System carry out the execution process of detailed description of the present invention method.Description below will be related to specific flow chart, the stream of attached drawing
Step shown in journey figure can execute in the computer system comprising such as a group of computer-executable instructions.Although flowing
The logical order of each step is shown in journey figure, but in some cases, it can be to be different from shown in sequence execution herein
The step of out or describing.
As shown in Fig. 2, first having to execute step S200 it can be appreciated that executing battery balanced control method of the invention,
Weighing apparatus mode setting procedure, the operating mode of battery balanced control device is set according to the specific requirements of user.Specific to this reality
Example is applied, is threshold value corresponding with battery cell temperature；Threshold value corresponding with power management chip temperature；And with battery charge and discharge
Whether the corresponding operation setup of electricity condition (can carry out equalization operation in the case where battery is in charge/discharge/blank state).More into
One step, in the present embodiment, threshold value corresponding with battery cell temperature is 50 degrees Celsius, and power management chip temperature is corresponding
Threshold value is 85 degrees Celsius.
Next can execute battery information acquisition step, obtain be connected in battery balanced control device from control plate
On battery cell battery information.In the present embodiment, battery information includes the monomer voltage of battery cell, battery cell temperature
Degree, power management chip temperature and battery charging condition.That is step S211 (temperature acquisition step), step S212 (voltage
Acquisition step) and step S213 (charging and discharging state judgment step).
Then step S220, system equalization order generation step can be executed.In the step S220 of the present embodiment, press
According to the operating mode obtained in step S200 based on the monomer electricity for being connected to battery cell all in battery balanced control device
Pressure, battery temperature and battery charging condition generate and output system equalization command.
System equalization order is sent to after control plate, executes step S230, communication mistake judgment step, judgement from control plate
Whether communication mistake is occurred.
When communication mistake occurs for judgement in step S230, step S240, veneer equilibrium life are executed from control plate accordingly
Enable generation step, according to the operating mode obtained in step S200 based on be connected to accordingly from control plate battery cell monomer
Voltage, battery temperature and battery charging condition generate and export veneer equalization command.
Step S250 can be finally executed, equalization command executes step, orders based on system equalization order or veneer equilibrium
It enables and discharge operation is executed to corresponding battery cell.
To sum up, battery balanced control device of the invention and method are not only more full during carrying out battery balanced
The considerations of face, has arrived the actual conditions of battery cell, also counter-measure is constructed based on a variety of fortuitous events, to realize more
For safely and effectively battery balanced control, more preferably battery balanced control effect is reached.
While it is disclosed that embodiment content as above but described only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Method of the present invention can also have other various embodiments.Without departing substantially from
In the case where essence of the present invention, those skilled in the art make various corresponding changes or change in accordance with the present invention
Shape, but these corresponding changes or deformation all should belong to scope of protection of the claims of the invention.
Claims (8)
1. a kind of battery balanced control device, which is characterized in that described device include master control borad and from control plate, in which:
Described to include voltage acquisition unit from control plate, the voltage acquisition unit is connected with battery cell, to obtain and export
The monomer voltage of the battery cell；
The master control borad includes main Balance route unit, all from control plate in the main Balance route unit and described device
Voltage acquisition unit is connected, to receive the monomer voltage and based on the monomer voltage output system equalization command；
It is described from control plate also include from Balance route unit, it is described from Balance route unit be located at it is same from control plate described in
Voltage acquisition unit and the main Balance route unit are connected, in the master control borad and the board communications mistake from control
Veneer equalization command is exported based on the monomer voltage；
It is described from control plate also include discharge cell, the discharge cell be located at it is same from control plate on the voltage acquisition list
It is first, described to be connected from Balance route unit and the corresponding battery cell, for being based on the system equalization order or institute
It states veneer equalization command and discharge operation is carried out to the battery cell；
Described device also includes interactive module, and the interactive module includes operating unit, the operating unit and the master control borad
And/or it is described connected from control plate, for exporting corresponding Balance route order according to user's operation to control the master control borad
And/or the detailed operation mode from control plate；The detailed operation mode includes: setting threshold corresponding with battery cell temperature
Value sets threshold value corresponding with power management chip temperature, and setting equilibrium state corresponding with battery charging condition；
The master control borad and it is described be provided with memory from control plate, the memory of the master control borad and the main Balance route list
Member is connected, and the memory from control plate is connected with described from Balance route unit, and the memory of the master control borad is for storing
Balance route order from operating unit, the memory from control plate are used to store the Balance route life from operating unit
It enables；
Wherein, when need to change the master control borad and/or it is described from control plate detailed operation mode when, pass through the operating unit
The Balance route order that memory and/or the memory from control plate to the master control borad store is modified.
2. device as described in claim 1, which is characterized in that the system/veneer equalization command includes equalizing voltage, described
Master/slave Balance route unit includes equalizing voltage calculator, and the equalizing voltage calculator is used for according to the master/slave balanced control
The monomer voltage that unit processed receives calculates according to ad hoc rules and exports the equalizing voltage.
3. device as claimed in claim 2, which is characterized in that the master/slave equalizing voltage calculator includes:
First voltage screening washer, for screening source from all monomer voltages that the master/slave Balance route unit receives
Monomer voltage in normal acquisition voltage range；
Second voltage screening washer is connected with the first voltage screening washer, for the output to the first voltage screening washer
Postsearch screening is done, when the number of voltages of the monomer voltage in normal acquisition voltage range is greater than particular value, from institute
It states and removes the highest monomer voltage of numerical value and the minimum monomer of numerical value in the monomer voltage in the normal acquisition voltage range
Voltage simultaneously exports the remaining monomer voltage；
Average calculator is connected with the second voltage screening washer, defeated for calculating and exporting the second voltage screening washer
The average value of monomer voltage out, the average value are the equalizing voltage.
4. device as described in claim 1, which is characterized in that described device also includes temperature collecting cell, and the temperature is adopted
Collection unit is used to obtain and export the temperature of specific components in the monomer temperature and/or described device of the battery cell.
5. device as described in claim 1, which is characterized in that described device also includes battery status judging unit, is used for
Judge and export the charging and discharging state of the battery cell.
6. device as described in claim 1, which is characterized in that the interactive module also includes display unit, and the display is single
Member is for collecting and showing the relevant information of described device.
7. a kind of battery balanced control method, which is characterized in that the method comprises the steps of:
Battery information acquisition step obtains the battery information for being connected to the battery cell of battery balanced control device, the battery
Information includes the monomer voltage of the battery cell；
System equalization order generation step generates simultaneously output system equalization command based on the monomer voltage got；
Veneer equalization command generation step occurs when master control borad in the battery balanced control device and from the communication between control plate
When mistake, accordingly generates from the monomer voltage of the battery cell on control plate based on being connected to and export veneer equalization command；
Equalization command executes step, is held based on the system equalization order or the veneer equalization command to corresponding battery cell
Row discharge operation；
Balanced mode setting procedure sets the operating mode of the battery balanced control device according to the specific requirements of user,
To be based on the specific operating mode in the system equalization order generation step or veneer equalization command generation step
Generate the corresponding system equalization order or the veneer equalization command；The operating mode includes: setting and battery cell
The corresponding threshold value of temperature sets threshold value corresponding with power management chip temperature, and sets corresponding with battery charging condition
Equilibrium state；
Wherein, the memory of the master control borad stores the system equalization order or the veneer equalization command, described from control plate
Memory store the system equalization order or the veneer equalization command；When needing to change the battery balanced control device
Operating mode when, Balance route order that memory to the master control borad and/or the memory from control plate store into
Row modification.
8. the method for claim 7, which is characterized in that the battery information also includes that battery temperature and/or battery fill
Discharge condition, in the system equalization order generation step or the veneer equalization command generation step, based on corresponding electricity
Pond temperature and/or battery charging condition generate and export the system equalization order or veneer equalization command.
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| CN109435759A (en) * | 2017-08-31 | 2019-03-08 | 比亚迪股份有限公司 | Battery information collector, battery equalization system, vehicle, method and storage medium |
| CN112540301B (en) * | 2020-11-27 | 2023-07-07 | 蜂巢能源科技股份有限公司 | Battery detection method, device and storage medium |
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