CN108944510A - The charge control method and electronic equipment of more battery packs - Google Patents
The charge control method and electronic equipment of more battery packs Download PDFInfo
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- CN108944510A CN108944510A CN201810736943.9A CN201810736943A CN108944510A CN 108944510 A CN108944510 A CN 108944510A CN 201810736943 A CN201810736943 A CN 201810736943A CN 108944510 A CN108944510 A CN 108944510A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The present invention provides the charge control method and electronic equipment of a kind of more battery packs, and the charge control method of more battery packs includes: the first battery pack that detection is configured on vehicle and whether the second battery pack meets and preset vehicle-mounted initial conditions in parallel；If so, executing the parallel connection of the first battery pack and the second battery pack, and it is transferred to next step；If it is not, executing the independent electric discharge of the first battery pack or the second battery pack；Judge whether the first battery pack and the second battery pack meet the cut-off condition for presetting vehicle-mounted parallel operation；If so, disconnecting parallel connection, and the step of independent electric discharge of the first battery pack of execution or the second battery pack；If it is not, returning to the step in parallel for executing the first battery pack and the second battery pack.Making battery pack work as far as possible, reduction fever reduces cost to the charge control method and electronic equipment of more battery packs provided by the present invention under parallel connection.
Description
Technical field
The invention belongs to the power technique fields of electric car, are related to a kind of control method, more particularly to a kind of mostly electric
The charge control method and electronic equipment of Chi Bao.
Background technique
Electric car (BEV) refers to using vehicle power supply as power, with motor driven wheels travel, meets road traffic, peace
The vehicle of full regulation requirements.Since effect on environment is smaller with respect to orthodox car, its prospects are considered optimistic wildly, but current skill
Art is still immature.
The type of electric car: pure electric automobile (BEV), hybrid vehicle (HEV), fuel cell car (FCEV).
Pure electric automobile by motor drive automobile.Pure electric automobile, relatively for fuel-engined vehicle, essential difference (different)
It is four big components, driving motor, speed setting controller, power battery, onboard charger.For gas station, it is by public affairs
With ultrafast charging station.The quality discrepancy of pure electric automobile depends on this four big component, and value height also depends on this four big portion
The quality of part.The purposes of pure electric automobile is also directly related in the selection and deployment of four big components.
Serial type hybrid automobile (SHEV): the driving force of vehicle is only derived from the hybrid power of motor (electronic) vapour
Vehicle.It is structurally characterized in that driven by engine electrical power generators, electric energy are conveyed to motor by electric machine controller, by motor drive
Running car.In addition, power battery individually can also provide electrical energy drive running car to motor.
Series-Parallel HEV (CHEV): while there is the hybrid power (electricity of tandem, parallel driving method
It is dynamic) automobile.Being structurally characterized in that can work under series hybrid mode, can also work under parallel hybrid mode, while simultaneous
The characteristics of having cared for series and parallel type.
But there are two big main problems for current electric car, first is that at high cost；Second is that charging is inconvenient, facility it is few and
Charging is slow；Third is that battery pack life time decay is too fast or causes internal short-circuit safety problem.
Therefore, the charge control method and electronic equipment of a kind of more battery packs how are provided, to solve existing electric car
Battery it is at high cost, charging is inconvenient, and facility is few and charging is slow, and battery pack life time decay is too fast or causes internal short-circuit and asks safely
The defects of topic, has become other technical problem urgently to be resolved of art technology in fact.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of charge controls of more battery packs
Method and electronic equipment, the battery for solving existing electric car is at high cost, and charging is inconvenient, and facility is few and charging is slow asks
Topic.
In order to achieve the above objects and other related objects, one aspect of the present invention provides a kind of charge control side of more battery packs
Method, for controlling the control device of more than one battery pack；The control device of more battery packs includes: one first battery pack, with institute
State the relay of the first battery pack electric connection；At least one second battery pack, the relay being electrically connected with second battery pack
Device；Controller is electrically connected with first battery pack, the second battery pack, relay respectively；Wherein, first battery pack
With the parallel connection of the second battery pack；The charge control method of more battery packs includes: the control device for initializing more battery packs；
Whether the first battery pack and the second battery pack that detection is configured on vehicle, which meet, is preset vehicle-mounted initial conditions in parallel；If so, holding
The parallel connection of row the first battery pack and the second battery pack, and it is transferred to next step；If it is not, executing the first battery pack or the second battery pack
Independent electric discharge；Wherein, described to preset vehicle-mounted initial conditions in parallel for judging that the first battery pack and the second battery pack whether
With parallel connection；Continue to judge whether the first battery pack and the second battery pack meet the cut-off condition for presetting vehicle-mounted parallel operation；If so,
Disconnect parallel connection, and the step of independent electric discharge of the first battery pack of execution or the second battery pack；The first battery pack is executed if it is not, returning
With the step in parallel of the second battery pack；Wherein, the cut-off condition for presetting vehicle-mounted parallel operation is for judging the first battery
Whether packet and the parallel operation of the second battery pack can end.
In one embodiment of the invention, described to preset vehicle-mounted initial conditions in parallel include: the first battery pack acceptable the
The time conditions of condition and parallel operation that two battery packs charge to it；And/or second battery pack be subjected to the first battery pack pair
The time conditions of its condition to charge and parallel operation.
In one embodiment of the invention, first battery pack is subjected to the condition packet that the second battery pack charges to it
Include: the open-circuit voltage during the battery discharge of open-circuit voltage during the battery discharge of the second battery pack and the first battery pack is greater than
Equal to 0, less than the chargeable pressure difference of the first battery pack；The operating voltage of second battery pack and the operating voltage of the first battery pack are big
In being equal to 0, less than or equal to the chargeable pressure difference of the first battery pack.
In one embodiment of the invention, second battery pack is subjected to the condition packet that the first battery pack charges to it
Include: the open-circuit voltage during the battery discharge of open-circuit voltage during the battery discharge of the first battery pack and the second battery pack is greater than
Equal to 0, less than the chargeable pressure difference of the second battery pack；The operating voltage of first battery pack and the operating voltage of the second battery pack are big
In being equal to 0, less than or equal to the chargeable pressure difference of the second battery pack.
In one embodiment of the invention, the time conditions of the parallel operation are when meeting the first battery pack acceptable the
When the condition or the second battery pack that two battery packs charge to it are subjected to the condition that the first battery pack charges to it, single parallel connection work
The predicted time of work is greater than the design time of single parallel operation.
In one embodiment of the invention, the cut-off condition for presetting vehicle-mounted parallel operation is the residue of the first battery pack
Electricity and the remaining capacity of the second battery pack are unequal, there are chargeable stream in the first battery pack or the second battery pack, and first
The remaining capacity of battery pack and the remaining capacity of the second battery pack all need to be more than or equal to 0.
In one embodiment of the invention, the cut-off condition for presetting vehicle-mounted parallel operation includes: cut-off condition 1 and cuts
Only condition 3 or cut-off condition 2 and cut-off condition 3；Wherein, cut-off condition 1 is the remaining capacity of the first battery pack less than the second electricity
The remaining capacity of Chi Bao, and there are the chargeable streams of the first battery pack；Cut-off condition 2 is that the remaining capacity of the second battery pack is less than
The remaining capacity of first battery pack, and there are the chargeable streams of the second battery pack；Cut-off condition 3 is the residue electricity of the first battery pack
Amount is more than or equal to 0, and the remaining capacity of the second battery pack is more than or equal to 0.
In one embodiment of the invention, the charge control method of more battery packs further includes executing each step
When, detect the remaining capacity of first battery pack and the second battery pack；To the surplus of first battery pack and the second battery pack
When remaining electricity is respectively less than a remaining capacity threshold value, terminate the charge control method of more battery packs.
Another aspect of the present invention provides a kind of electronic equipment, is installed in the control device of more than one battery pack, comprising: processing
Device and memory；The memory is for storing computer program, and the processor is by executing based on the memory storage
Calculation machine program, so that the electronic equipment executes the charge control method of more battery packs, to control more battery packs
Control device
As described above, the charge control method and electronic equipment of more battery packs of the invention, have the advantages that
The charge control method and electronic equipment of the more battery packs of the present invention make as far as possible battery pack work in parallel connection
Under state, fever is reduced, cost is reduced.
Detailed description of the invention
Fig. 1 is shown as theory structure schematic diagram of the control device of more battery packs of the invention in an embodiment.
Fig. 2A is shown as a kind of schematic diagram of implementation principle structure of controller of the invention.
Fig. 2 B is shown as the schematic diagram of another implementation principle structure of controller of the invention.
Fig. 2 C is shown as the schematic diagram of another implementation principle structure of controller of the invention.
Fig. 3 is shown as flow diagram of the charge control method of more battery packs of the invention in an embodiment.
Component label instructions
The control device of more than 1 battery pack
11 first battery packs
12 second battery packs
13 controllers
14 loads
15 low-tension supplies
16 first current sensors
17 second current sensors
132 second primary control modules
133 primary control modules
134 from control module
135 first from control module
136 second from control module
137 total control modules
138 sub-control units
S31-S36 step
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
Embodiment one
The present embodiment provides a kind of control device of more battery packs, the control device of more battery packs includes:
One first battery pack, the relay being electrically connected with first battery pack；
At least one second battery pack, the relay being electrically connected with second battery pack；
Controller is electrically connected with first battery pack, the second battery pack, relay respectively；
Wherein, first battery pack and the second battery pack are in parallel.
The control device of more battery packs provided by the present embodiment is described in detail below with reference to diagram.Using double
Battery pack scheme, battery pack A reorganize and outfit battery pack as vehicle, and the electricity of battery pack A is able to satisfy the short-distance need of 90% high frequency of user
It asks.Battery pack B is installed on vehicle as expanding packet in high mileage requirement, interim to expand vehicle course continuation mileage.Compared with mesh
Preceding vehicle monocell packet scheme a large amount of on the market, integral vehicle cost is low, and the standing weight of vehicle is low to more environmentally friendly, meets user
Demand of riding instead of walk in urban district or the suburbs；Simultaneously can carry expanding packet, it is interim to expand vehicle course continuation mileage, meet user's low frequency
High mileage trip requirements, realize shared economy；
As expanding packet, the non-carry of B packet can be used as energy-storage battery packet use when on electric car.The function of B packet
Can suitably it simplify, so as to optimize the cost of overall plan.Such as B packet SOC calculate, SOH calculate etc. can be in energy storage station
Complete etc..
B packet carry can work independently on electric car with A packet, can be with A packet tandem working, can also work in parallel with A packet
Make.But when with A packet parallel operation, the output power singly wrapped is small, and battery-heating is few, and heat management is easy to accomplish, and battery life is longer,
It is the cheapest implementation of cost.The present invention devises a kind of simple and practical can realize by relay and control logic
Double-contracting control method, make as far as possible battery pack work under parallel connection, reduce fever, reduce cost.
Double-contracting is in parallel, whether has feasibility in technology, depends primarily on selected battery core and series-parallel quantity.It is double
When packet is in parallel, high-tension battery packet can charge to A-battery packet, or exist and can charge to A-battery packet
Possibility, if charging current be more than A-battery packet chargeable electric current, will lead to A-battery packet life time decay it is too fast or
Person causes internal short-circuit safety problem.Whether batteries of electric automobile packet may be designed as vehicle-mounted used in parallel and meets quality assurance needs, main
To depend on selected battery core and series-parallel quantity.
Referring to Fig. 1, being shown as theory structure schematic diagram of the control device of more battery packs in an embodiment.Such as Fig. 1
Shown, the control device 1 of more battery packs includes the first battery pack 11, and the second battery pack 12, relay, is born controller 13
Carry the 14, first current sensor 16 and the second current sensor 17.The relay includes electrical with first battery pack 11
The relay of connection and the relay being electrically connected with second battery pack, wherein electrically connect with first battery pack 11
The relay connect includes the first relay 111 connecting with the anode of the first battery pack and connect with the cathode of the first battery pack 11
The second relay 112；It include being connect with the anode of the second battery pack 12 with the relay that second battery pack is electrically connected
Third relay 113 and the 4th relay 114 that is connect with the cathode of the second battery pack 12.In the present embodiment, it is described after
Electric appliance further includes the 5th relay 115 being electrically connected with first relay 111 and third relay 113.The load
14 are electrically connected with the 5th relay 115.5th relay 115 indicates the total output relay of double-contracting.Described first
Between first battery pack 11 and the second relay 112, second current sensor 17 is located at current sensor 16
Between the second pond packet 12 and the 4th relay 114.
In the present embodiment, when not considering motor feedback, the disconnection of relay and closure can generate 5 kinds of work shapes
State.Table 1 is please referred to, 5 kinds of working conditions of the control device of more battery packs are shown as.
Table 1: 5 kinds of working condition tables of the control device of more battery packs
In the present embodiment, Fig. 2A, 2B and 2C are please referred to, is respectively indicated as one kind of controller, it is another and another
The schematic diagram of implementation principle structure.
As shown in Figure 2 A, the controller 13 includes the first primary control module being electrically connected with first battery pack
131 and with second battery pack be electrically connected the second primary control module 132.Wherein, first main control module 131
Low-tension supply 15 is electrically connected with the second main control module 132.In the present embodiment, the first primary control module 131 and second
Several sub-control units 138 are all electrically connected under primary control module 132.
Main control module of the first primary control module 131 as the first battery pack, the second primary control module 132 are made
For the main control module of the second battery pack, the institute for having the battery management module of guarantee electric car respectively is functional, and double-contracting is in parallel
The judgement of condition and the function of double-contracting Parallel Control can integrate on any one main control module.
As shown in Figure 2 B, the controller 13 includes the primary control module 133 being electrically connected with first battery pack
And with second battery pack be electrically connected from control module 134.Wherein, the primary control module 133 and described low
Voltage source 15 is electrically connected.The primary control module 133 and from being all electrically connected several sub- control lists under control module 134
Member 138.
In the present embodiment, the primary control module 133 is in addition to having all of the battery management module of electric car
Outside function, also have the function of following new:
It 1) is to power from control module 134；
2) it acquires from the high-voltage signal and alarm signal with control module 134；
3) judgement of double-contracting parallel connection condition；With
4) double-contracting Parallel Control.In addition, for suitable battery chemistries system and complete vehicle structure, the SOC of the second battery pack
Calculating can integrate in primary control module 131.
In the embodiment of second of controller, since the second battery pack is made of more dry cell mould groups.Therefore, institute
It states from control module 134 and, for acquiring each battery modules, detecting to the high-voltage signal of the second battery pack, calculates second
Battery pack SOC (function can be integrated in the second battery pack from in control module 134, also can integrate in the first battery
The primary control module 133 of packet).
As shown in Figure 2 C, the controller 13 includes being electrically connected with first battery pack first from control module
135, second battery pack be electrically connected second from control module 136 and with described first from control module 135 and
Second from the total control module 137 connected with control module 136.The total control module 137 and the low-tension supply 15 are electrical
Connection.First from control module and second from being all electrically connected several sub-control units 138 under control module.The master control
Molding block 137 is the main control module of the first battery pack and the second battery pack, with the following functions:
1) it powers from control module 135 and second from control module 136 for first；
2) acquisition first from control module 135 and second from the high-voltage signal of control module 136 and alarm signal
Acquisition,
3) judgement of double-contracting parallel connection condition；
4) double-contracting Parallel Control, while first can amortize out from control module 135 and second from control module 136
The partial functions such as SOC is checked, SOH is calculated are to total control module 137.
The control device of more battery packs provided by the present embodiment make as far as possible battery pack work in parallel connection
Under, fever is reduced, cost is reduced.
Embodiment two
The present embodiment provides a kind of charge control methods of more battery packs, for controlling the control device of more than one battery pack；
The control device of more battery packs includes: one first battery pack, the relay being electrically connected with first battery pack；At least
One second battery pack, the relay being electrically connected with second battery pack；Controller, respectively with first battery pack,
Two battery packs, relay are electrically connected；Wherein, first battery pack and the second battery pack are in parallel；More battery packs are filled
Electric control method includes:
Initialize the control device of more battery packs；
Whether the first battery pack and the second battery pack that detection is configured on vehicle, which meet, is preset vehicle-mounted initial conditions in parallel；
If so, executing the parallel connection of the first battery pack and the second battery pack, and it is transferred to next step；If it is not, executing the first battery pack or the
The independent electric discharge of two battery packs；Wherein, described to preset vehicle-mounted initial conditions in parallel for judging the first battery pack and the second battery
Whether packet can be in parallel；
Continue to judge whether the first battery pack and the second battery pack meet the cut-off condition for presetting vehicle-mounted parallel operation；If
It is to disconnect parallel connection, and the step of independent electric discharge of the first battery pack of execution or the second battery pack；The first electricity is executed if it is not, returning
The step in parallel of Chi Bao and the second battery pack；Wherein, the cut-off condition for presetting vehicle-mounted parallel operation is for judging first
Whether the parallel operation of battery pack and the second battery pack can end.
It is described in detail below with reference to the control method of diagram offer described in the present embodiment, the present embodiment is provided
The control device based on more battery packs control method technical principle it is as shown in Figure 3:
Each node is explained as follows:
Node 1: since battery pack A is vehicle-mounted main battery packet, user is delivered with vehicle, vehicle-mounted using in life cycle
Carry is on the vehicle always.Battery pack B is reserve battery packet, in the case where battery pack A not enough power supply, and is needed long-distance
In the case where traveling, the entrucking of battery pack B is completed in electrical changing station, therefore the function of battery pack B is equivalent to mobile phone charge pal, and electricity
The original state of pond packet B is generally full power state；
Node 2: judge whether the first battery pack and the second battery pack meet and preset vehicle-mounted initial conditions in parallel；
Node 3: battery pack A and battery pack B execute parallel connection by the on-off of relay SPST1~SPST4 on automobile
Whether；
Node 4: since battery pack A is vehicle-mounted main battery packet, user is delivered with vehicle, vehicle-mounted using in life cycle
Carry is on the vehicle always.Therefore battery pack A original state it is more various, possible temperature is very low, it is also possible to temperature compared with
It is high.Battery pack B is reserve battery packet, in the case where battery pack A not enough power supply and in the case where needing long-distance running,
The entrucking of electrical changing station completion battery pack B.Therefore the initial temperature of battery pack B is often room temperature.Therefore battery pack A and battery pack B
Temperature it is different, or even have a long way to go.
Although being allocated without power electronic class component and component (such as DC-DC converter) to electric current of the double-contracting after in parallel,
But since the temperature of battery pack A and battery pack B are different or even gap is larger, after parallel discharge after a period of time, A
The SOC variation delta SOC of packet and B packetAWith Δ SOCBAlso it can differ larger.Therefore it needs to judge whether to reach cut-off condition in parallel.
Node 5: if after reaching cut-off condition in parallel, individually being discharged by the higher battery pack of OCV, transporting vehicle
Row.
Node 6: if non-parallel operation, and do not reach under initial conditions in parallel, then it is independent by the higher battery pack of OCV
Electric discharge, runs vehicle.
Node 7: parallel connection must be under the premise of battery is surrounded by electricity, if battery pack A or battery pack B electricity in operation
It gives out light, even there are also faint electricity, but are not enough to the time of supports in parallel work, then can not realize parallel connection again.
Specifically, the control method of the control device based on more battery packs specifically includes following steps:
S31 initializes the control device of more battery packs.In the present embodiment, the control device of more battery packs
Refer into init state, the second battery pack carry is in the state being full of, the first relay to the 5th on a vehicle
Relay access failure.The control device of more battery packs is under init state, and first battery pack is as main battery
Packet, second battery pack is as reserve battery packet.
S32, after vehicle enters driving status, real-time monitoring main battery packet (being indicated in the present embodiment with A letter) and standby
With the open-circuit voltage (OCV during the battery discharge of battery pack (being indicated in the present embodiment with B letter)AAnd OCVB), main battery packet
With the real-time operating voltage (U of reserve battery packetAAnd UB), the chargeable stream (I of main battery packet and reserve battery packetA- can fillWith
IB- can fill), chargeable pressure difference (the Δ U of main battery packet and reserve battery packetA- can fillWith Δ UB- can fill)。
S33, whether the first battery pack and the second battery pack that detection is configured on vehicle, which meet, is preset vehicle-mounted starting in parallel
Condition；If so, executing S34, that is, the parallel connection of the first battery pack and the second battery pack is executed, and be transferred to next step S35；If it is not,
Execute S36, that is, execute the first battery pack or the second battery pack independent electric discharge (in the present embodiment, detect main battery packet A with
Open-circuit voltage during the battery discharge of reserve battery packet, if OCVAGreater than OCVB, main battery packet A externally discharges；If OCVAIt is small
In OCVB, reserve battery packet B externally discharges).In the present embodiment, described to preset vehicle-mounted initial conditions in parallel for judging first
Whether battery pack and the second battery pack can be in parallel.
In the present embodiment, described to preset vehicle-mounted initial conditions in parallel and include:
First battery pack is subjected to the time conditions of condition and parallel operation that the second battery pack charges to it；And/or
Second battery pack is subjected to the time conditions of condition and parallel operation that the first battery pack charges to it.
In the present embodiment, when the first battery pack of satisfaction is subjected to the condition or the second battery that the second battery pack charges to it
One in the condition that acceptable first battery pack charges to it is wrapped, double cell packet can be in parallel.When being unsatisfactory for the first battery pack
The condition or the second battery pack that acceptable second battery pack charges to it are subjected to the condition that the first battery pack charges to it, double electricity
Pond packet can not be in parallel.
In the present embodiment, the acceptable second battery pack B of the first battery pack A specifically includes the condition that it charges:
0≤OCVB-OCVA<ΔUA- can fill=IA- can fill*RAB；
0≤UB-UA<ΔUA- can fill=IA- can fill*RAB(wherein, Rab is the resistance value between battery pack A and battery pack B).
Second battery pack is subjected to specifically including for the condition that the first battery pack charges to it:
0≤OCVA-OCVB<ΔUB- can fill=IB- can fill*RAB；
0≤UA-UB<ΔUB- can fill=IB- can fill*RAB。
In the present embodiment, in order to apply on automobile, vehicle-mounted double cell packet also needs to meet the timeline of parallel operation
Part, i.e. TParallel connection _ prediction>TParallel connection _ design,TParallel connection _ predictionTo come out single parallel connection according to the state of battery pack and motoring condition dynamic prediction
The predicted time of work, TParallel connection _ designDesign time for the single parallel operation determined in the design phase.
If TParallel connection _ designIt is defined shorter, it will lead to frequent on-off in parallel, lead to the reliability and component of vehicle
Service life is poor.TParallel connection _ designWhen should be obtain maximum on the basis of meeting control reliability and component service life
Between be worth.If TParallel connection _ designDefined shorter, the meaning of parallel operation would not be apparent.
In the present embodiment, S34 is executed by the on-off of relay SPST1~SPST4.
S35 detects the remaining capacity (SOC of the first battery pack and the second battery packAAnd SOCB), according to the first battery pack and
The remaining capacity of second battery pack, judges whether the first battery pack and the second battery pack meet the cut-off for presetting vehicle-mounted parallel operation
Condition；Disconnect in parallel if so, executing, and execute S36, i.e., the independent electric discharge of the first battery pack or the second battery pack the step of；If
It is no, i.e. return S34；Wherein, the cut-off condition for presetting vehicle-mounted parallel operation is for judging the first battery pack and the second battery
Whether the parallel operation of packet can end.
In the present embodiment, the cut-off condition for presetting vehicle-mounted parallel operation includes: the remaining capacity of main battery packet
Unequal with the remaining capacity of reserve battery packet, main battery packet or reserve battery wrap that there are chargeable streams, and main battery
The remaining capacity of packet and the remaining capacity of reserve battery packet all need to be more than or equal to 0.
The cut-off condition for presetting vehicle-mounted parallel operation specifically:
Cut-off condition 1:SOCA<SOCB, and there are the chargeable stream I of main battery packetA- can fill；
Cut-off condition 2:SOCB<SOCA, and there are the chargeable stream I of reserve battery packetB- can fill；
Cut-off condition 3:SOCA>=0, and SOCB≥0。
In the present embodiment, after double cell packet is in parallel, since the temperature of main battery packet A and reserve battery packet B are different
It causes (such as main battery packet A initial temperature less than 0 DEG C, reserve battery packet B initial temperature room temperature etc.), leads to main battery packet A
It is inconsistent with the internal resistance of reserve battery packet B, therefore the external discharge current of main battery packet A and reserve battery packet B are inconsistent.By
The electric discharge of a period of time is run, the SOC residue variation delta SOC of main battery packet A and reserve battery packet BA≠ΔSOCB, temperature
Lower battery pack SOC variable quantity is small.If the temperature difference of even main battery packet A and reserve battery packet B is larger, primary electricity
The SOC variation delta SOC of pond packet A and reserve battery packet BAWith Δ SOCBAlso it can differ larger.
Therefore battery pack in parallel may no longer meet vehicle-mounted parallel operation requirement through operation after a period of time.Therefore it needs
Want the discharge current of real-time measurement main battery packet A and reserve battery packet B.There is electricity in main battery packet A and reserve battery packet B
In the case where (meet cut-off condition 3), the lower battery pack of SOC occur electric current recharge (meet cut-off condition 1 or cut-off
When condition 2, charging of the high-tension battery packet to A-battery packet), then parallel connection is disconnected, is individually discharged by the higher battery pack of SOC.
In the present embodiment, during S32~S36, detect main battery packet A and reserve battery packet B in vehicle row
It sails middle electricity to give out light, when even only remaining faint electricity, that is, detects the remaining capacity of main battery packet A and reserve battery packet B
When less than a power threshold, terminate above-mentioned control method.
By taking certain well-known battery producer battery core as an example, 25 ° of battery cores shown in the sustainable charging current of battery pack as shown in table 1, table 2
OCV data:
Table 1: the sustainable charging current of battery pack
| T/SOC | 10% | 30% | 40% | 50% | 70% | 80% |
| 0° | 20 | 20 | 20 | 20 | 20 | 10 |
| 10° | 30 | 30 | 30 | 30 | 30 | 20 |
| 25° | 130 | 130 | 120 | 110 | 65 | 30 |
Although temperature reduces in table 1, chargeable electric current IIt can fillReduce, but temperature reduction also can cause internal resistance sharply
Increase.
2:25 ° of battery core OCV data of table
By taking 100Ah battery core as an example, the packet sustainable charging current 30A in the state of 25 DEG C, 80%SoC, when composition 96
Concatenated 35 degree of packets, the AC internal Resistance (impedance) of single battery packet is about 55mOhm, as A packet and B packet, then high pressure
The voltage difference of packet and low pressure packet, which is less than 3.3V, can realize to the charging of low pressure packet；When low pressure packet is in 70%SoC, then high voltage package and
The voltage difference delta U of low pressure packetIt fillsIt can realize less than 7.15V and charge to low pressure packet, high voltage package at this time and low can be calculated by table 2
The remaining capacity difference Δ SoC of briquetting is -7%~8%.When low pressure packet is in 50%SoC, this chargeable pressure differential deltap UIt fillsIncrease
To 12.1V, the remaining capacity difference Δ SOV that high voltage package at this time and low pressure packet can be calculated by table 2 is -14%~22%,
Realization is very easy to control.Chargeable pressure differential deltap U of the high voltage package of certain above-mentioned discussion to low pressure packetIt fills, remaining capacity it is poor
Δ SOV is than more conservative, because battery is in a situation of use, the internal resistance that charge and discharge process is externally embodied is DC internal resistance,
AC internal Resistance is much smaller than DC internal resistance.It is determinant whether can be in parallel, electric current I when in parallel that whether low pressure packet chargeableIt fills?
It should not be too large.
Embodiment three
A kind of electronic equipment provided by the embodiments of the present application is installed on the control device of more battery packs described in embodiment one
In.The electronic equipment with include: processor, memory, transceiver, communication interface and system bus；Memory and communication connect
Mouth connect with processor and transceiver and completes mutual communication by system bus, and memory is for storing computer journey
Sequence, communication interface is used for and other equipment are communicated, and processor and transceiver make electronic equipment for running computer program
Execute each step of the charge control method of more battery packs as described in embodiment two.
System bus mentioned above can be Peripheral Component Interconnect standard
(PeripheralPomponentInterconnect, abbreviation PCI) bus or expanding the industrial standard structure
(ExtendedIndustryStandardArchitecture, abbreviation EISA) bus etc..The system bus can be divided into address
Bus, data/address bus, control bus etc..Communication interface for realizing database access device and other equipment (such as client,
Read and write library and read-only library) between communication.Memory may include random access memory (RandomAccessMemory, letter
Claim RAM), it is also possible to it further include nonvolatile memory (non-volatilememory), a for example, at least magnetic disk storage.
Above-mentioned processor can be general processor, including central processing unit (CentralProcessingUnit, letter
Claim CPU), network processing unit (NetworkProcessor, abbreviation NP) etc.；It can also be digital signal processor
(DigitalSignalProcessing, abbreviation DSP), specific integrated circuit
(ApplicationSpecificIntegratedCircuit, abbreviation ASIC), field programmable gate array (Field-
ProgrammableGateArray, abbreviation FPGA) either other programmable logic device, discrete gate or transistor logic device
Part, discrete hardware components.
In conclusion the charge control method and electronic equipment of more battery packs provided by the present invention are making as far as possible
Battery pack works under parallel connection, reduces fever, reduces cost, and charging is convenient.So the present invention effectively overcomes existing skill
Various shortcoming in art and have high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (9)
1. a kind of charge control method of more battery packs, which is characterized in that for controlling the control device of more than one battery pack；It is described
The control device of more battery packs includes: one first battery pack, the relay being electrically connected with first battery pack；At least 1
Two battery packs, the relay being electrically connected with second battery pack；Controller, respectively with first battery pack, second electricity
Chi Bao, relay are electrically connected；Wherein, first battery pack and the second battery pack are in parallel；The charging control of more battery packs
Method processed includes:
Initialize the control device of more battery packs；
Whether the first battery pack and the second battery pack that detection is configured on vehicle, which meet, is preset vehicle-mounted initial conditions in parallel；If
It is to execute the parallel connection of the first battery pack and the second battery pack, and be transferred to next step；If it is not, executing the first battery pack or second
The independent electric discharge of battery pack；Wherein, described to preset vehicle-mounted initial conditions in parallel for judging the first battery pack and the second battery pack
Whether can be in parallel；
Continue to judge whether the first battery pack and the second battery pack meet the cut-off condition for presetting vehicle-mounted parallel operation；If so, disconnected
Open parallel connection, and the step of independent electric discharge of the first battery pack of execution or the second battery pack；If it is not, return execute the first battery pack and
The step in parallel of second battery pack；Wherein, the cut-off condition for presetting vehicle-mounted parallel operation is for judging the first battery pack
Whether can end with the parallel operation of the second battery pack.
2. the charge control method of more battery packs according to claim 1, which is characterized in that
It is described to preset vehicle-mounted initial conditions in parallel and include:
First battery pack is subjected to the time conditions of condition and parallel operation that the second battery pack charges to it；And/or
Second battery pack is subjected to the time conditions of condition and parallel operation that the first battery pack charges to it.
3. the charge control method of more battery packs according to claim 2, which is characterized in that
First battery pack is subjected to the second battery pack
Open-circuit voltage during the battery discharge of open-circuit voltage during the battery discharge of second battery pack and the first battery pack is big
In being equal to 0, less than the chargeable pressure difference of the first battery pack；
The operating voltage of the operating voltage of second battery pack and the first battery pack is more than or equal to 0, less than or equal to the first battery pack
Chargeable pressure difference.
4. the charge control method of more battery packs according to claim 2, which is characterized in that
Second battery pack is subjected to the first battery pack
Open-circuit voltage during the battery discharge of open-circuit voltage during the battery discharge of first battery pack and the second battery pack is big
In being equal to 0, less than the chargeable pressure difference of the second battery pack；
The operating voltage of the operating voltage of first battery pack and the second battery pack is more than or equal to 0, less than or equal to the second battery pack
Chargeable pressure difference.
5. the charge control method of more battery packs according to claim 2, which is characterized in that the time of the parallel operation
Condition is when the first battery pack of satisfaction is subjected to the condition that the second battery pack charges to it or acceptable first electricity of the second battery pack
When the condition that Chi Bao charges to it, the predicted time of single parallel operation is greater than the design time of single parallel operation.
6. according to right want 1 described in more battery packs charge control method, which is characterized in that
The cut-off condition for presetting vehicle-mounted parallel operation is the remaining capacity of the first battery pack and the residue electricity of the second battery pack
Measure it is unequal, there are chargeable stream in the first battery pack or the second battery pack, and the remaining capacity of the first battery pack and the second electricity
The remaining capacity of Chi Bao all needs to be more than or equal to 0.
7. according to right want 6 described in more battery packs charge control method, which is characterized in that
The cut-off condition for presetting vehicle-mounted parallel operation includes: cut-off condition 1 and cut-off condition 3 or cut-off condition 2 and ends
Condition 3；
Wherein, cut-off condition 1 is remaining capacity of the remaining capacity less than the second battery pack of the first battery pack, and there are the first electricity
The chargeable stream of Chi Bao；
Cut-off condition 2 is remaining capacity of the remaining capacity less than the first battery pack of the second battery pack, and there are the second battery packs
Chargeable stream；
Cut-off condition 3 is that the remaining capacity of the first battery pack is more than or equal to 0, and the remaining capacity of the second battery pack is more than or equal to 0.
8. according to right want 1 described in more battery packs charge control method, which is characterized in that the charging control of more battery packs
Method processed further includes detecting the remaining capacity of first battery pack and the second battery pack when executing each step；To described
When the remaining capacity of first battery pack and the second battery pack is respectively less than a remaining capacity threshold value, terminate the charging of more battery packs
Control method.
9. a kind of electronic equipment, which is characterized in that be installed in the control device of more than one battery pack, comprising: processor and storage
Device；
The memory is used to execute the computer journey of the memory storage for storing computer program, the processor
Sequence, so that the electronic equipment executes the charge control method of more battery packs as described in any one of claims 1 to 8, with control
Make the control device of more battery packs.
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| CN201810736943.9A CN108944510A (en) | 2018-07-06 | 2018-07-06 | The charge control method and electronic equipment of more battery packs |
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| CN109802463A (en) * | 2019-02-28 | 2019-05-24 | 维沃移动通信有限公司 | Charging circuit, electricity acquisition methods and terminal |
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