CN110224184A - Power battery, electric car and the control method to charge to the power battery - Google Patents
Power battery, electric car and the control method to charge to the power battery Download PDFInfo
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- CN110224184A CN110224184A CN201810172467.2A CN201810172467A CN110224184A CN 110224184 A CN110224184 A CN 110224184A CN 201810172467 A CN201810172467 A CN 201810172467A CN 110224184 A CN110224184 A CN 110224184A
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- Prior art keywords
- battery modules
- voltage
- battery
- relay
- power
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
This application involves charging technique field more particularly to a kind of power batteries, electric car and the control method to charge to the power battery.The application specifically includes that the first end for being respectively used to connection power supply unit anode and the second end for connecting the power supply unit cathode, at least two battery modules between the first end and the second end are set, the first relay is connected at least two battery modules between adjacent cell mould group, each battery modules are separately connected the first end and the second end by least one second relay.To, realize the compatibility to high and low supply voltage, it does not need additionally to configure transformation system, reduce the power battery even cost of Rechargeable vehicle, and when being charged by the power battery of the application, it can automatically switch series and parallel mode according to the different of supply voltage, thus, promote the flexibility and convenience of charging.
Description
Technical field
This application involves charging technique field more particularly to a kind of power battery, electric car and to the power battery into
The control method of row charging.
Background technique
With popularizing for New-energy electric vehicle, the development of direct current rapid nitriding is become more and more important.Especially
In order to adapt to the continual mileage increasingly grown, the capacity requirement of the power battery of electric car is also increasing.
Correspondingly, the high supply voltage of 800V or so is proposed, at present to meet the charge requirement of great-capacity power battery.But
It is that the charging voltage (generally 400V or so) and charging modes of the power battery of existing major part Rechargeable vehicle are fixed,
It can not be compatible with high supply voltage and low suppling voltage, need additionally to configure transformation system adjustment pressure drop for electric car to match confession
Piezoelectric voltage, thus, increase charging cost and victory inconvenient for use.
It needs to find a kind of new power battery and charging scheme as a result,.
Summary of the invention
The embodiment of the present application provides a kind of power battery, electric car and the controlling party to charge to the power battery
Method, to solve the problems, such as that power battery existing in the prior art can not be compatible with high and low supply voltage.
In order to solve the above-mentioned technical problem, the embodiment of the present application adopts the following technical solutions:
A kind of power battery, comprising: be respectively used to the first end of connection power supply unit anode and connect the power supply unit
The second end of cathode, is arranged at least two battery modules between the first end and the second end, and described at least two
The first relay is connected in battery modules between adjacent cell mould group, each battery modules pass through at least one second relay
It is separately connected the first end and the second end.
Optionally, the battery modules, specifically include: battery module, and, connect the relay of described battery module one end
Device mould group.
Optionally, the battery core quantity that the battery module includes is identical, and battery core connection type is identical.
Optionally, when the power battery includes two battery modules, wherein the first battery modules and the second battery mould
Intermediate relay is connected between group, first battery modules are separately connected the of power battery by the first auxiliary relay
One end and second end, second battery modules are separately connected the first end and second of power battery by the second auxiliary relay
End.
Optionally, the threshold voltage ranges of first battery modules and second battery modules are 250V-450V.
A kind of electric car, including the power battery.
A kind of control method to charge to the power battery, comprising:
When supply voltage is first voltage, it is closed the first relay connected between adjacent cell mould group, is disconnected all
Second relay, so that at least two battery modules serial connection charges of power battery；Wherein, the first voltage be it is described extremely
The sum of the threshold voltage of few two battery modules；
When supply voltage is second voltage, judge whether the voltage of each battery modules is identical；If so, disconnecting adjacent
The first relay connected between battery modules is closed all second relays, so that at least two batteries of power battery
Modules in parallel charging；If it is not, then disconnecting the first relay connected between adjacent cell mould group, and control all battery moulds of adjustment
The voltage of group is identical, so that at least two battery modules in parallel of power battery charge；Wherein, the second voltage is described
The threshold voltage of battery modules.
Optionally, the voltage of all battery modules of control adjustment is identical, specifically includes:
Determine the maximum battery modules of voltage and the smallest battery modules of voltage at least two battery modules；
Charged in parallel is successively carried out to other battery modules other than the maximum battery modules of voltage, until with voltage maximum
Battery modules voltage it is identical.
Optionally, charged in parallel is successively carried out to other battery modules other than the maximum battery modules of voltage, it is specific to wrap
It includes:
Corresponding second relay of the smallest battery modules of sealing voltage；
When the voltage of the smallest battery modules of the voltage reaches the voltage of the small battery modules of voltage time, successively to electricity
Other battery modules other than maximum battery modules are pressed to carry out charged in parallel.
Optionally, when the power battery includes two battery modules, supply voltage is monitored；
If the supply voltage be first voltage, be closed connection the first battery modules and the second battery modules centre after
Electric appliance disconnects the first auxiliary relay and the second auxiliary relay, so that the first battery modules and the series connection of the second battery modules
Charging, wherein the first voltage is the sum of the threshold voltage of first battery modules and second battery modules；
If the supply voltage is second voltage, the voltage and the second battery mould of first battery modules are judged
Whether the voltage of group is identical；If they are the same, then the intermediate relay is disconnected, the first auxiliary relay and the second auxiliary relay are closed
Device, so that the first battery modules and the second battery modules in parallel charge；If the voltage of the first battery modules is greater than the second battery
The voltage of mould group, then disconnect the intermediate relay, and corresponding second auxiliary relay of the second battery modules of closure disconnects first
Corresponding first auxiliary relay of battery modules, to charge to second battery modules, when second battery modules
Voltage when reaching the voltage of first battery modules, corresponding first auxiliary relay of the first battery modules of closure so that
It obtains the first battery modules and the second battery modules in parallel charges.
The embodiment of the present application use at least one above-mentioned technical solution can reach it is following the utility model has the advantages that
By the technical solution, at least two battery modules are set in the inside of power battery, and be respectively these batteries
Series connection mode and parallel is arranged in mould group, thus, enable the power battery to carry out high pressure in a series arrangement
Charging also can carry out low pressure charging with parallel way.In turn, it realizes to the compatibility of high and low supply voltage, does not need additionally to match
Transformation system is set, when reducing the power battery even cost of Rechargeable vehicle, and being charged by the power battery of the application,
It can automatically switch series and parallel mode according to the different of supply voltage, thus, promote the flexibility and convenience of charging.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 a is one of the structural schematic diagram of power battery provided by the present application；
Fig. 1 b is the schematic diagram of internal structure of battery modules in power battery provided by the present application；
Fig. 2 is the inner connecting structure schematic diagram of battery module provided by the present application；
Fig. 3 is the second structural representation of power battery provided by the present application；
Fig. 4 is one of the step schematic diagram of the control method provided by the present application to charge to power battery；
Fig. 5 a is the electrical block diagram that power battery provided by the present application charges in a series arrangement；
Fig. 5 b is the electrical block diagram that power battery provided by the present application is charged with parallel way；
Fig. 6 a- Fig. 6 d be power battery provided by the present application include three battery modules when charging work principle signal
Figure；
Fig. 7 a is the operation principle schematic diagram of serial connection charge when power battery provided by the present application includes two battery modules；
Fig. 7 b is the two of the step schematic diagram of the control method provided by the present application to charge to power battery；
Fig. 7 c- Fig. 7 e is respectively that the work of charged in parallel when power battery provided by the present application includes two battery modules is former
Manage schematic diagram.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Below in conjunction with attached drawing, the technical scheme provided by various embodiments of the present application will be described in detail.
It should be noted that power battery involved in the application can be adapted for electric car or other use power
The electric mechanical product of battery, equipment, the application are not defined the usage scenario of power battery and suitable device, only
If voltage and installation matching.And the power battery in the application is still to supply based on electric car, i.e., it is following real
Example is applied to be illustrated by taking the power battery being useful on electric car as an example.
It is the structural schematic diagram of power battery provided by the present application referring to Fig.1 shown in a, which specifically includes that
It is respectively used to the first end A of connection power supply unit anode and connects the second end B of the power supply unit cathode, setting
At least two battery modules 11 between first end A and second end B, adjacent cell mould group 11 at least two battery modules 11
Between be connected with the first relay 12, each battery modules 11 are separately connected first end A by least one second relay 13
With second end B.In this application, power supply unit had both included the direct-current charging post with positive and negative electrode, also included that can fill exchange
The alternating current of electric stake is converted to the Vehicular charger of direct current, it is however generally that, either AC charging or DC charging, power supply
The electric energy of equipment can charge to power battery by direct current after high voltage distribution box.The application does not set power supply
Standby current work principle is defined.
By the technical solution, at least two battery modules are set in the inside of power battery, and be respectively these batteries
Series connection mode and parallel is arranged in mould group, thus, enable the power battery to carry out high pressure in a series arrangement
Charging also can carry out low pressure charging with parallel way.In turn, it realizes to the compatibility of high and low supply voltage, does not need additionally to match
Transformation system is set, when reducing the power battery even cost of Rechargeable vehicle, and being charged by the power battery of the application,
It can automatically switch series and parallel mode according to the different of supply voltage, thus, promote the flexibility and convenience of charging.
Wherein, referring to Fig.1 shown in b, battery modules 11 are specifically included: battery module 111, and, connect the battery mould
The relay mould group 112 of 111 one end of block.And the relay mould group 112 further comprises: main relay 112a, preliminary filling relay
112b and preliminary filling resistance 112c.It is illustrated by taking the anode connection relay mould group 112 of battery module 111 as an example: main relay
The anode of one end connection battery module 111 of device 112a, the other end connect the first end A of power battery；Preliminary filling relay 112b
One end connect preliminary filling resistance 112c, the other end connect power battery first end A；One end of preliminary filling resistance 112c connects preliminary filling
Relay 112b, the other end connect the anode of battery module 111.To which preliminary filling relay 112b and preliminary filling resistance 112c be gone here and there
It is linked togather, meanwhile, the series circuit of preliminary filling relay 112b and preliminary filling resistance 112c are in parallel with main relay 112a.
It should be noted that above description be only by battery module 111 anode connection relay mould group 112 for,
It is real, the scheme of the cathode connection relay mould group 112 of battery module 111 can also be included.In at least two battery modules 11,
The internal structure of each battery modules 11 can be consistent, can also be with slight difference.For example, the internal structure of all battery modules 11
It can be the anode connection relay mould group 112 of battery module 111；Alternatively, the internal structure of all battery modules 11 can be with
It is the cathode connection relay mould group 112 of battery module 111；Alternatively, the internal structure of percentage of batteries mould group 11 is battery mould
The anode connection relay mould group 112 of block 111, the internal structure of percentage of batteries mould group 11 are that the cathode of battery module 111 connects
Relay mould group 112.
It should be understood that in the case where the place-exchange of battery module 111 and relay mould group 112, in relay mould group 112
Main relay 112a, preliminary filling relay 112b and preliminary filling resistance 112c series and parallel relationship it is constant, it is understood that there may be connection position
It sets and changes, should be adjusted flexibly.
Optionally, in this application, the battery core quantity that battery module includes is identical, and battery core connection type is identical.It considers
The technique and technical restriction of cell device, cannot achieve the cell device of single large capacity.It therefore, generally can be by will be multiple
Battery core is combined into the battery module of required capacity.The battery core quantity for including in each battery module in the application is identical, Er Qieduo
A battery core connection type is identical.For example, each battery module 111 may include 15 identical capacity referring to shown in Fig. 2
Battery core is denoted as battery core 1- battery core 15；Wherein, battery core 1- battery core 5 is connected, and battery core 6- battery core 10 is connected, concatenated by two later
Structure is in parallel, connects with battery core 11- battery core 15, the battery module 111 of capacity needed for being formed.Wherein, it shows, defines for convenience
Lateral connection relationship indicates in parallel, and longitudinally connected relationship indicates series connection.The embodiment is only to illustrate, the practical packet of each battery module
The battery core quantity contained is not limited to 15, can arbitrarily set according to demand.
In the above scheme, related power battery can be useful in institute according to the update of actual demand and technology
The charging field of voltage range that there may be or occur.And in view of current power supply voltage range is 400V or so, it should
Low-voltage possibly can not well adapt to the demand of current quick charge, therefore, the high voltage supply voltage of 800V or so meet the tendency of and
It is raw.So, when the supply voltage of the supply voltage and 800V or so that only provide 400V or so on the market, power electric in the application
Pond can be used with flowering structure:
Referring to shown in Fig. 3, which includes two battery modules, wherein the first battery modules 21 and the second battery mould
Intermediate relay 23 is connected between group 22, the first battery modules 21 are separately connected power battery by the first auxiliary relay 24
First end A and second end B, the second battery modules 22 are separately connected the first end of power battery by the second auxiliary relay 25
A and second end B.Wherein, the internal structure of the first battery modules 21 and the second battery modules 22 is the same as above-mentioned Fig. 1 introduction, including electricity
Pond module, relay mould group.
Optionally, in the structure of power battery shown in Fig. 3, the threshold of the first battery modules 21 and the second battery modules 22
Threshold voltage range is 250V-450V.In this way, when the first battery modules 21 are connected with the second battery modules 22, power battery
Threshold voltage ranges be 500V-900V.When the first battery modules 21 are in parallel with the second battery modules 22, the threshold of power battery
Threshold voltage range is 250V-450V.
The application provides a kind of electric car, including power battery involved in any of the above-described embodiment.In addition, further including
Other automobile parts etc., this will not be repeated here.
It, can be by the way that battery modules be carried out with the switching of series and parallel come real in the structure of the above-mentioned power battery referred to
It is now compatible with the purpose of different power voltage, still, it is contemplated that in the actual use process, especially power battery uses (logical
Cross power battery supply vehicle power traveling or supply other equipment power operation) after a period of time, these battery modules
Residual voltage situation is inconsistent, if carrying out charged in parallel, the moment of auxiliary relay closure, electricity to these battery modules at this moment
Press higher battery modules that can charge to the lower battery modules of voltage, and very due to the internal resistance of battery module in battery modules
It is small, very big electric current can be generated in moment, and battery modules and circuit structure are caused to damage.
For this purpose, the application also provides the control method that power battery mentioned by a kind of couple of the application charges, reference
Shown in Fig. 4, specifically include that
Step 31: when supply voltage is first voltage, being closed the first relay connected between adjacent cell mould group, break
All second relays are opened, so that at least two battery modules serial connection charges of power battery；Wherein, the first voltage is
The sum of the threshold voltage of at least two battery modules.
In this application, it the range of first voltage and is not construed as limiting, generally 800V or so or 800V or more, to adapt to
High-voltage charge demand.Similarly, the application is also not construed as limiting the range of second voltage, generally 800V or less.First electricity
Pressure is higher than second voltage.
Referring to shown in Fig. 5 a, which includes battery modules C1, battery modules C2 ... battery modules Cn, wherein
It is connected with the first relay D1 between battery modules C1 and battery modules C2, is connected between battery modules C2 and battery modules C3
Second relay D2 ..., in this way, battery modules C1- battery modules Cn can be closed by multiple first relays of connection
Shi Shixian series connection.The second all at this time relays disconnect.When supply voltage is first voltage, power battery can be controlled automatically
The first relay closure is made, the second all relays, this n battery modules of battery modules C1- battery modules Cn are then turned off
It charges in series.
Step 32: when supply voltage is second voltage, judging whether the voltage of each battery modules is identical；If so,
The first relay connected between adjacent cell mould group is disconnected, all second relays are closed, so that power battery is at least
Two battery modules in parallel chargings；If it is not, then disconnecting the first relay connected between adjacent cell mould group, and control adjustment institute
There is the voltage of battery modules identical, so that at least two battery modules in parallel of power battery charge；Wherein, second electricity
Pressure is the threshold voltage of the battery modules.
Referring to shown in Fig. 5 b, battery modules C1 is respectively connected to first end A by the second relay E1 in the power battery
First end A and second end B ..., battery mould are respectively connected to by second relay E2, E2 ' with second end B, battery modules C2
Group Cn by the second relay En is respectively connected to first end A and second end B, in this way, battery modules C1- battery modules Cn can be with
It is realized by the second relay respectively connected in closure in parallel.When supply voltage is second voltage and each battery modules
When voltage is identical, all first relays are disconnected, are closed all second relays, this n electricity of battery modules C1- battery modules Cn
Chi Mo group charges in parallel.When supply voltage is second voltage and there are when different voltages, then disconnect all the
One relay, and control adjust all battery modules voltage it is identical so that the battery modules C1- battery modules of power battery
Cn charged in parallel.
Optionally, step 32 is specific to execute when the voltage that control adjusts all battery modules is identical are as follows:
The first step determines the maximum battery modules of voltage and the smallest battery mould of voltage at least two battery modules
Group.
Second step successively carries out charged in parallel to other battery modules other than the maximum battery modules of voltage, until with
The voltage of the maximum battery modules of voltage is identical.
Further, charged in parallel is successively carried out to other battery modules other than the maximum battery modules of voltage, it is specific to wrap
It includes:
Corresponding second relay of the smallest battery modules of sealing voltage；
When the voltage of the smallest battery modules of the voltage reaches the voltage of the small battery modules of voltage time, successively to electricity
Other battery modules other than maximum battery modules are pressed to carry out charged in parallel.
It is second voltage and battery modules to above-mentioned supply voltage so that power battery includes three battery modules as an example below
There is different be illustrated in voltage.
Referring to shown in Fig. 6 a, which includes battery modules C1, battery modules C2 and battery modules C3；Battery modules
It is connected with the first relay D1 between C1 and battery modules C2, the first relay is connected between battery modules C2 and battery modules C3
Device D2；Battery modules C1 is respectively connected to the first end A and second end B of power battery, battery modules by the second relay E1
C2 is respectively connected to the first end A and second end B of power battery by the second relay E2, and battery modules C3 passes through the second relay
Device E3 divides the first end A and second end B for being half connected to power battery.
When supply voltage is the voltage difference of second voltage and battery modules, first, it is determined that the maximum battery mould of voltage
Group and the smallest battery modules of voltage, it is assumed that the voltage of battery modules C1 therein is maximum, and the voltage of battery modules C2 takes second place, electricity
The voltage of Chi Mo group C3 is minimum.So, it according to shown in Fig. 6 b, can first charge to battery modules C3, i.e. closure battery mould
Second relay E3 of group C3 connection, disconnects the second relay E1 and second relay E2, E2 '；Referring to shown in Fig. 6 c, work as battery
When the voltage of mould group C3 charges to identical as the voltage of battery modules C2, the second relay E2 of closure battery modules C2 connection,
E2 ' still keeps the second relay E1 to disconnect, and then battery modules C1 and battery modules C2 charged in parallel；Referring to shown in Fig. 6 d,
When the voltage of battery modules C2 and battery modules C3 are charged to it is identical as the voltage of battery modules C1 when, closure battery modules C1 connect
The the second relay E1 connect, and then battery modules C1, battery modules C2 and battery modules C3 charging parallel with one another.To avoid
The voltage being likely to occur due to charged in parallel it is inconsistent and lead to that momentary charge electric current is larger and the problem of damage circuit element,
Improve charge efficiency and safety.
It should be understood that in existing power supply unit, largely or based on the supply voltage of 400V or so, in order to adapt to
The demand of fast-speed direct current charging, has gradually appeared the supply voltage of 800V or so, below just to be mainly used for adaptation 400V or so
Low-voltage power supply equipment and 800V or so high voltage work order equipment power battery for describe in detail.
Referring to shown in Fig. 7 a, which mainly includes first end A and second end B, battery module 41 and battery module
Intermediate relay 43 is provided between 42, the other end of battery module 41 is connected with main positive relay 44, the main positive relay
Device 44 is in parallel with positive preliminary filling relay 45, meanwhile, there are also a preliminary filling resistance and positive preliminary filling relay 45 to be connected in series；Accordingly
Ground, the other end of battery module 42 are connected with main cathode relay 46, the main cathode relay 46 and cathode preliminary filling relay 47
Parallel connection, meanwhile, there are also another preliminary filling resistance and cathode preliminary filling relay 47 to be connected in series.The other end of battery module 41 also passes through
Auxiliary negative relay 49 is connected to second end B, and the other end of battery module 42 also passes through auxiliary positive relay 48 and is connected to
First end A.Wherein, battery module 41, main positive relay 44 and positive preliminary filling relay 45 and preliminary filling resistance collectively form
First battery modules M1, battery module 42, main cathode relay 46 and cathode preliminary filling relay 47 and the common structure of preliminary filling resistance
At the second battery modules M2.
Under normal circumstances, the voltage of battery module 41 and battery module 42 is identical, battery module 41 and battery mould
The threshold voltage ranges of block 42 all can be 250V-450V.When being powered using power battery, battery module 41 and battery
Module 42 is in series connection, output voltage range 500V-900V.
It is illustrated so that power battery is electric car power supply as an example, when vehicle needs normally travel, in power battery
Portion can first be closed main cathode relay 46 and intermediate relay 43, be closed positive preliminary filling relay 45, then to avoid direct
Power supply is damaged caused by power supply circuit.After resistance after connect with positive preliminary filling relay 45 is connected, reaches preliminary filling threshold value, close
Main positive relay 44 is closed, and disconnects positive preliminary filling relay 45；And cathode preliminary filling relay 47, auxiliary negative relay 49,
All in off-state, power battery passes through the sum of battery module 41 and the voltage of battery module 42 and is auxiliary positive relay 48
Electric car supply of electrical energy.
When power battery after a period of use, be not enough to continue a journey, therefore, it is necessary to be the power battery charging.Due to
In actual use process, each battery does not ensure that absolute consistency, leads to the electricity of each battery module real surplus
Amount, voltage are inconsistent, in order to avoid the damage to element each in battery charger, can be filled in the following ways
Electricity.
Referring to shown in Fig. 7 b, which be may comprise steps of:
Step 51: monitoring supply voltage.
Step 52: judging whether supply voltage is more than or equal to first voltage, if so, thening follow the steps 53, otherwise, execute step
Rapid 54.
Step 53: the intermediate relay 43 of closure connection the first battery modules M1 and the second battery modules M2 disconnect auxiliary
Cathode relay 49, auxiliary positive relay 48, so that the first battery modules M1 and the second battery modules M2 serial connection charge.Its
In, first voltage is the sum of the threshold voltage of the first battery modules M1 and the second battery modules M2.
Referring now still to shown in Fig. 7 a, dotted portion is circuit route in the conductive state, to reaching the shape since charging
State, intermediate closure, the disconnection process that can pass through the elements such as preliminary filling relay, auxiliary relay, this will not be repeated here.
Step 54: judge whether the voltage of the first battery modules M1 is identical as the voltage of the second battery modules M2, if they are the same,
55 are thened follow the steps, otherwise, executes step 56.
Step 55: intermediate relay 43 is disconnected, auxiliary negative relay 49, auxiliary positive relay 48 are closed, so that
First battery modules M1 and the second battery modules M2 charged in parallel, until being full of.
Specific charging conducting route is referring to shown in Fig. 7 c.
Step 56: intermediate relay 43 is disconnected, if the voltage of the first battery modules M1 is greater than the electricity of the second battery modules M2
Pressure is then closed the corresponding auxiliary negative relay 49 of the second battery modules M2, disconnects the corresponding auxiliary of the first battery modules M1 just
Pole relay 48, to charge to the second battery modules M2；
If the voltage of the first battery modules M1 is closed M1 pairs of the first battery modules less than the voltage of the second battery modules M2
The auxiliary positive relay 48 answered disconnects the corresponding auxiliary negative relay 49 of the second battery modules M2, to the first battery mould
Group M1 charges.
Specific charging conducting route is referring to Fig. 7 d and Fig. 7 e.
Step 57: when the voltage of the second battery modules M2 reaches the voltage of the first battery modules M1, alternatively, working as institute
When stating the voltage of the first battery modules M1 and reaching the voltage of the second battery modules M2,55 are gone to step.
As a result, by above-mentioned charge control scheme, difference can be adapted to according to power battery structure provided by the present application
The power supply unit of voltage realizes the charging compatibility to high-low voltage power supply unit.It does not need additionally to increase transformation system,
Flexibility and convenience are improved, cost and vehicle weight are reduced.Moreover, it is also possible to each battery modules voltage not
With in the case where, individually charges to the lower battery modules of voltage, then successively carry out charged in parallel again, parallel connection is avoided to fill
Battery modules voltage is different and cause to damage to cell device when electric, and improves charge efficiency and safety.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (10)
1. a kind of power battery characterized by comprising described in the first end and connection for being respectively used to connection power supply unit anode
At least two battery modules between the first end and the second end are arranged in the second end of power supply unit cathode, described
Be connected with the first relay at least two battery modules between adjacent cell mould group, each battery modules by least one the
Two relays are separately connected the first end and the second end.
2. power battery as described in claim 1, which is characterized in that the battery modules specifically include:
Battery module, and, connect the relay mould group of described battery module one end.
3. power battery as claimed in claim 2, which is characterized in that the battery core quantity that the battery module includes is identical, electricity
Core connection type is identical.
4. power battery as described in any one of claims 1-3, which is characterized in that when the power battery includes two batteries
When mould group, wherein being connected with intermediate relay between the first battery modules and the second battery modules, first battery modules are logical
The first end and second end that the first auxiliary relay is separately connected power battery is crossed, second battery modules pass through the second auxiliary
Relay is separately connected the first end and second end of power battery.
5. power battery as claimed in claim 4, which is characterized in that first battery modules and second battery modules
Threshold voltage ranges be 250V-450V.
6. a kind of electric car, which is characterized in that including the described in any item power batteries of claim 1-5.
7. the control method that a kind of pair of described in any item power batteries of claim 1-5 charge, which is characterized in that packet
It includes:
When supply voltage is first voltage, it is closed the first relay connected between adjacent cell mould group, disconnects all second
Relay, so that at least two battery modules serial connection charges of power battery；Wherein, the first voltage is described at least two
The sum of the threshold voltage of a battery modules；
When supply voltage is second voltage, judge whether the voltage of each battery modules is identical；If so, disconnecting adjacent cell
The first relay connected between mould group is closed all second relays, so that at least two battery modules of power battery
Charged in parallel；If it is not, then disconnecting the first relay connected between adjacent cell mould group, and control all battery modules of adjustment
Voltage is identical, so that at least two battery modules in parallel of power battery charge；Wherein, the second voltage is the battery
The threshold voltage of mould group.
8. control method as claimed in claim 7, which is characterized in that the voltage that control adjusts all battery modules is identical, tool
Body includes:
Determine the maximum battery modules of voltage and the smallest battery modules of voltage at least two battery modules；
Charged in parallel is successively carried out to other battery modules other than the maximum battery modules of voltage, until with the maximum electricity of voltage
The voltage of Chi Mo group is identical.
9. control method as claimed in claim 8, which is characterized in that other batteries other than the maximum battery modules of voltage
Mould group successively carries out charged in parallel, specifically includes:
Corresponding second relay of the smallest battery modules of sealing voltage；
When the voltage of the smallest battery modules of the voltage reaches the voltage of the small battery modules of voltage time, successively most to voltage
Other battery modules other than big battery modules carry out charged in parallel.
10. such as the described in any item control methods of claim 7-9, which is characterized in that when the power battery includes two electricity
When Chi Mo group, supply voltage is monitored；
If the supply voltage is first voltage, it is closed the intermediate relay of connection the first battery modules and the second battery modules
Device disconnects the first auxiliary relay and the second auxiliary relay, so that the first battery modules and the series connection of the second battery modules are filled
Electricity, wherein the first voltage is the sum of the threshold voltage of first battery modules and second battery modules；
If the supply voltage is second voltage, judge first battery modules voltage and second battery modules
Whether voltage is identical；If they are the same, then the intermediate relay is disconnected, the first auxiliary relay and the second auxiliary relay are closed,
So that the first battery modules and the second battery modules in parallel charge；If the voltage of the first battery modules is greater than the second battery modules
Voltage, then disconnect the intermediate relay, corresponding second auxiliary relay of the second battery modules of closure disconnects the first battery
Corresponding first auxiliary relay of mould group, to charge to second battery modules, when the electricity of second battery modules
When pressure reaches the voltage of first battery modules, corresponding first auxiliary relay of the first battery modules of closure, so that the
One battery modules and the second battery modules in parallel charge.
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| CN201810172467.2A CN110224184A (en) | 2018-03-01 | 2018-03-01 | Power battery, electric car and the control method to charge to the power battery |
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Application publication date: 20190910 |