CN107554345A - Double source battery bag, management method and system and electric automobile - Google Patents
Double source battery bag, management method and system and electric automobile Download PDFInfo
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- CN107554345A CN107554345A CN201710842524.9A CN201710842524A CN107554345A CN 107554345 A CN107554345 A CN 107554345A CN 201710842524 A CN201710842524 A CN 201710842524A CN 107554345 A CN107554345 A CN 107554345A
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- 238000007726 management method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims description 70
- 238000007599 discharging Methods 0.000 claims description 33
- 230000009191 jumping Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 11
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 208000019901 Anxiety disease Diseases 0.000 description 3
- 230000036506 anxiety Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000003862 health status Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
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- 229910001416 lithium ion Inorganic materials 0.000 description 1
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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
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Abstract
The present invention, which provides a kind of double source battery bag, management method and system and electric automobile, double source battery bag, to be included：Main battery bag storehouse and auxiliary battery bag storehouse；Main battery bag storehouse is fixed in the electric automobile, including main battery bag and first switch unit；Auxiliary battery bag storehouse is removably mounted in electric automobile, including auxiliary battery bag and second switch unit.Main battery bag and auxiliary battery bag are connected in parallel the discharge and recharge path for including main path, bypass footpath and common path with formation.Also, main battery bag is different with the standard of auxiliary battery bag.The present invention can neatly select the auxiliary battery bag storehouse with different electricity, so that double source battery bag can be with flexible combination, to meet different continual mileages, adaptively meet the continual mileage demand of driver, the holistic cost of the electrokinetic cell system of electric automobile is reduced, enhances vehicle competitiveness.
Description
Technical Field
The invention relates to the field of power batteries of electric automobiles, in particular to a dual-source battery pack with a range extending function, a management method and a management system of the dual-source battery pack, and an electric automobile.
Background
At present, a pure Electric Vehicle (EV) (Electric Vehicle) is rapidly developed in the world, and is influenced by the driving habits of a traditional Vehicle, the requirement on the long driving range of the EV gradually becomes a mainstream trend, for example, the highest pure Electric driving range of a Tesla Model-S long driving range version is nearly 500 kilometers, and people also claim that the EV exceeding 400km is proposed in the future.
To meet the long driving range requirement, a power Battery system (Battery Pack) configured for an electric vehicle requires a larger capacity, typically exceeding 50 kWh. The cost of the battery system and the space occupied by the battery pack in the whole vehicle installation all present considerable challenges to the manufacture of the electric vehicle.
At present, electric vehicles generally adopt two modes to meet the requirements of a high-power battery pack:
firstly, the capacity of a single battery cell is increased, for example, a 96Ah ternary lithium ion battery is released by samsung. Although the capacity of monomer electricity core has been increased, the increase of its capacity will bring the increase of space occupancy certainly, so also can restrict the utilization ratio in whole car battery space greatly to, when designing the battery package, the free combination of being not convenient for of monomer electricity core of large capacity, this makes the expansibility variation of battery package, can't adapt to the different mileage demands of continuing to go.
Secondly, a large number of small-capacity monomer battery cores are adopted: for example, the battery pack scheme of tesla is based on the small-capacity cells 18650, and tens of thousands of the small-capacity cells are combined to meet the requirement of the large-capacity battery pack. Although the random combination of tens of thousands of single battery cells solves the problems of large capacity and convenient combination, the adoption of a large number of single battery cells inevitably causes the reduction of the overall safety and reliability of the battery pack.
In addition, no matter which of the above two schemes is adopted, in order to ensure the service life of the whole vehicle, the requirement on the reliability of the single battery cell is extremely high, and thus the cost of the whole battery pack of the electric vehicle is difficult to control.
In the whole cost of the electric vehicle EV, the cost of the power battery pack system accounts for 40-70%. Calculated according to the current battery cell price, the cost of the power battery pack mostly exceeds 50% of the whole cost of the electric vehicle EV. Compared with the traditional fuel-based automobile, the EV has no cost advantage, thereby greatly restricting the market acceptance of the EV.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a dual-source battery pack, a management method and system, and an electric vehicle, which are used for solving the problem of the prior art that the cost of the battery pack of the electric vehicle is too high.
In order to achieve the above and other related objects, the present invention provides a dual-source battery pack for an electric vehicle, including: the main battery pack bin and the auxiliary battery pack bin; the main battery pack bin comprises a main battery pack and a first switch unit; the auxiliary battery pack bin comprises an auxiliary battery pack and a second switch unit; the auxiliary battery pack bin is detachably arranged in the electric automobile through a mechanical quick-change structure and is connected with the main battery pack bin; the main battery pack and the auxiliary battery pack are connected in parallel to form a charging and discharging path of the main battery pack and/or the auxiliary battery pack; the charging and discharging path consists of a main path special for charging and discharging the main battery pack, an auxiliary path special for charging and discharging the auxiliary battery pack and a common path for charging and discharging the main battery pack and the auxiliary battery pack together; a first switching unit disposed on the main path and controlling charging and discharging of the main battery pack; a second switch unit disposed on the auxiliary path and controlling charging and discharging of the auxiliary battery pack; and the battery cell standards of the main battery pack and the auxiliary battery pack are different.
In an embodiment of the invention, the cell standard includes: shape, material, rated voltage, capacity, production time.
In an embodiment of the invention, the auxiliary battery pack compartment including the auxiliary battery pack and the second switch unit is selectively installed according to an actual driving range requirement.
In an embodiment of the present invention, the main battery pack further includes a first detection unit, a third switch unit, a common detection unit, and a first storage unit; the first detection unit is connected with the main battery pack and used for detecting the temperature, the voltage and/or the current of the main battery pack and the working state of the first switch unit; the third switch unit is arranged on the common path and is used for simultaneously controlling the charging and discharging of the main battery pack and the auxiliary battery pack; the common detection unit is positioned on the common path and used for detecting the voltage and the current of the common path and the working state of the third switching unit; the first storage unit is used for storing relevant data of the main battery pack; the auxiliary battery pack bin also comprises a second detection unit and a second storage unit; the second detection unit is connected with the auxiliary battery pack and is used for detecting the temperature, the voltage and/or the current of the auxiliary battery pack and the working state of the second switch unit; and the second storage unit is connected with the auxiliary battery pack and used for storing the related data of the auxiliary battery pack.
In an embodiment of the invention, the first switch unit, the second switch unit and the third switch unit adopt soft switches and/or hard switches.
In an embodiment of the present invention, the main battery compartment further includes: a control unit; the control unit is respectively connected with the first switch unit, the second switch unit and the third switch unit and used for receiving control instructions through a CAN network and controlling the first switch unit, the second switch unit and/or the third switch unit to be switched on and off according to the control instructions.
In an embodiment of the present invention, the main battery compartment further includes: a control unit; the control unit is respectively connected with the first detection unit, the second detection unit, the common detection unit, the first switch unit, the second switch unit, the third switch unit, the first storage unit and the second storage unit, and is used for controlling the opening and closing of the first switch unit, the second switch unit and/or the third switch unit according to the detection results of the first detection unit, the second detection unit and/or the common detection unit and/or the storage data of the first storage unit and the second storage unit.
The invention also discloses an electric automobile which adopts the double-source battery pack.
The invention also discloses a management method of the double-source battery pack, which is applied to a vehicle control unit of an electric vehicle, and an auxiliary battery pack bin of the double-source battery pack is detachably arranged in the electric vehicle through a mechanical quick-change structure; the management method of the dual-source battery pack comprises the following steps: step S41, receiving a driving range requirement of a driver; step S42, evaluating the driving range requirement: when the driving range requirement is smaller than a preset first range threshold value, the auxiliary battery pack bin is not prompted to be installed, and the step S44 is skipped; when the driving range requirement is larger than the first range threshold value, prompting to install the auxiliary battery pack bin; step S43, detecting whether the auxiliary battery pack bin is well installed by using the control unit of the dual-source battery pack: if yes, go to step S44; if not, prompting early warning; and step S44, adjusting the power output of the dual-source battery pack.
In an embodiment of the invention, the step S42 further includes: continuously judging whether the driving range requirement is greater than a preset second range threshold value, if so, prompting to install the auxiliary battery pack bin with high electric quantity, and then jumping to the step S43; if not, prompting to install the auxiliary battery pack bin with low electric quantity, and then jumping to the step S43.
In an embodiment of the present invention, the step S44 includes: adjusting the power output of a main battery pack bin of the double-source battery pack; or adjusting the power output of the main battery pack of the double-source battery pack and the power output of the auxiliary battery pack bin.
In an embodiment of the invention, the first mileage threshold and the second mileage threshold are preset according to an average daily mileage of a driver.
The invention also discloses a management system of the double-source battery pack, which is applied to a vehicle control unit of an electric vehicle, and an auxiliary battery pack bin of the double-source battery pack is detachably arranged in the electric vehicle through a mechanical quick-change structure; the dual-source battery pack management system includes: the receiving module is used for receiving the driving range requirement provided by the driver; the evaluation control module is used for evaluating and controlling the driving range requirement according to a preset first range threshold and a preset second range threshold; the detection module is used for detecting whether the auxiliary battery pack bin is well installed or not by using the control unit of the double-source battery pack; the prompt early warning module is used for giving a prompt or early warning to a driver according to the judgment control result of the judgment control module and/or the detection result of the detection module; the adjusting module is used for adjusting the power output of the dual-source battery pack; and the storage module is used for storing the first mileage threshold value and the second mileage threshold value.
In an embodiment of the present invention, the adjusting module is configured to adjust a power output of a main battery pack in a main battery pack compartment of the dual-source battery pack or adjust power outputs of an auxiliary battery pack in the main battery pack and the auxiliary battery pack compartment.
As described above, according to the dual-source battery pack, the management method and system and the electric vehicle of the present invention, the battery packs with different cell standards are respectively used as the main battery pack and the auxiliary battery pack, the main battery pack and the auxiliary battery pack are respectively disposed in the corresponding battery pack compartments, and the auxiliary battery pack compartments are detachably mounted in the electric vehicle. Because the auxiliary battery pack bin is detachable, the double-source battery pack is managed according to the driving range requirement of a driver, and the auxiliary battery pack bins of the auxiliary battery packs with different electric quantities are prompted to be installed according to different driving range requirements, so that the main battery pack bin of the double-source battery pack can be flexibly combined with different auxiliary battery pack bins to meet different driving ranges, the driving range requirement of the driver is met in a self-adaptive manner, the anxiety of automobile electric energy supply is eliminated, the overall cost of a power battery system of the electric automobile is reduced, and the overall competitiveness of the whole automobile is enhanced. In addition, main battery package and supplementary battery package carry out the charge-discharge with corresponding switch unit to make main battery package and supplementary battery package supply power for electric automobile more rationally, strengthened the safety redundancy, even a battery package breaks down, the driver also can be with the car to the destination or 4S maintenance.
Drawings
Fig. 1 is a schematic structural diagram of a dual-source battery pack according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a dual-source battery pack using a hard switch according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a dual-source battery pack using a soft switch according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating a method for managing a dual-source battery pack according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram illustrating a management system of a dual-source battery pack according to an embodiment of the present invention.
Description of the element reference numerals
110 main battery bag
120 first switch unit
130 first detection unit
140 main battery pack bin
150 first memory cell
210 auxiliary battery pack
220 second switch unit
230 second detection unit
240 auxiliary battery compartment
250 second memory cell
310 third switching unit
320 common detection unit
400 control unit
S41-S44
510 receiving module
520 judging module
530 detection module
540 adjusting module
550 prompt early warning module
560 memory module
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
Please refer to the attached drawings. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The invention provides a double-source battery pack, a management method and a management system as well as an electric automobile, which are provided based on the statistics of the average driving mileage of most drivers (excluding operation services, such as the taxi industry) per day, wherein the average driving mileage of a common driver per day is about 70-80 kilometers, and the driving requirement of more than 150 kilometers accounts for less than 10% of the whole life cycle of automobile driving. That is, in order to meet the market target requirement of high driving range, the real practical significance of the battery pack is less than 10%, and meanwhile, a great part of the design requirements of the performance and reliability of the whole battery pack is over-designed. Therefore, the main battery pack bin and the auxiliary battery pack bin of the double-source battery pack are designed in a separated mode, so that the main battery pack and the auxiliary battery pack can adopt different battery cells, and the auxiliary battery pack bin can be selected according to requirements and then can be detachably installed in the electric automobile. Therefore, the requirements of different driving ranges of a driver are met to a greater extent, the over-design of the whole battery pack is avoided, and the cost of the whole vehicle is reduced. In addition, aiming at the detachable auxiliary battery pack bin, a method and a system for managing the double-source battery pack by using the whole vehicle controller are disclosed.
Example 1
The embodiment discloses a dual-source battery pack applied to an electric vehicle, as shown in fig. 1, including: a main battery compartment 140 and an auxiliary battery compartment 240. Wherein, the main battery pack bin 140 includes: a main battery pack 110, a first switching unit 120, a first detection unit 130, a third switching unit 310, a common detection unit 320, and a control unit 400. The auxiliary battery pack storage 240 includes: an auxiliary battery pack 210, a second switching unit 220, and a second detection unit 230. Wherein,
the main battery pack bin 140 is a main source of electric energy of the electric automobile, is fixedly installed on the electric automobile, and is unchangeable and replaceable; the auxiliary battery compartment 240 is a range-extending source of electric energy for the electric vehicle, is detachably mounted on the electric vehicle, and is connected to the main battery compartment 140. Preferably, the replacement between the auxiliary battery pack storage 240 and the electric vehicle is performed by a mechanical quick-change structure. That is, the auxiliary battery pack 240 can be replaced according to the health status of the battery of the auxiliary battery pack 210 and/or the driving range requirement of the entire vehicle, so that the main battery pack and the auxiliary battery pack can supply power to the electric vehicle more reasonably to meet different requirements of the driver.
The main battery pack 110 and the auxiliary battery pack 210 are connected in parallel, and form charge and discharge paths of the main battery pack 110 and the auxiliary battery pack 210, as indicated by chain lines and solid lines in fig. 1. The charging and discharging path comprises a main path, an auxiliary path and a public path. The main path (a solid line where the main battery pack 110 is located in fig. 1) refers to a branch path where the main battery pack 110 is located in the charging and discharging path, and the branch path is dedicated to the main battery pack 110; the auxiliary path (a solid line where the auxiliary battery pack 210 is located in fig. 1) is a branch path where the auxiliary battery pack 210 is located in the charge and discharge path, and the branch path is dedicated to the auxiliary battery pack 210; the common path (a dotted line in fig. 1) is a path that the main battery pack 110 and the auxiliary battery pack 210 use in common during charging and discharging in the charging and discharging path.
The main battery pack 110 and the auxiliary battery pack 210 may adopt battery packs of the same electric core standard or battery packs of different electric core standards. However, the rated voltages provided by the main battery pack 110 and the auxiliary battery pack 210 are the same or similar, and the voltage provided by the auxiliary battery pack 210 is less than the voltage provided by the main battery pack 110, so as to ensure the normal use of the entire vehicle. Moreover, the cell standards of the battery pack mentioned in this embodiment include, but are not limited to: shape, material, rated voltage, capacity, production time.
Preferably, the main battery pack 110 of the present embodiment employs a power energy hybrid battery cell, which meets the requirements of vehicle dynamic performance, economy, and service life not less than 8 years or 12 kilometers. In general, the main battery pack 110 selects a power energy hybrid battery cell with a monomer cycle life of more than 2000 times, and the electric quantity is preferably the 150km driving range under the entire vehicle NEDC working condition. The auxiliary battery pack 210 employs high energy ratio cells. As mentioned above, the auxiliary battery pack 210 is mainly used to meet the requirement of longer driving range, and the proportion of the driving range in the whole life cycle of the vehicle is not more than 10%, so that the auxiliary battery pack 210 can meet the requirement by selecting a high energy ratio battery cell with a monomer cycle life of more than 500 times. Therefore, the main battery pack 110 and the auxiliary battery pack 210 can meet the requirements of a driver on traveling, the mileage anxiety is eliminated, the overall cost of the power battery system can be reduced, and the overall vehicle competitiveness is enhanced.
The first switch unit 120 is disposed on the main path, and is used to control charging and discharging of the main battery pack 110; the second switch unit 220 is disposed on the auxiliary path, and is configured to control charging and discharging of the auxiliary battery pack 210; the third switching unit 310 is disposed on the common path and is used to control the operating condition of the entire dual-source battery pack. When the first switch unit 120 is closed and the third switch unit 310 is closed, the main battery pack 110 is charged and discharged; the auxiliary battery pack 210 is charged and discharged with the second switching unit 220 and the third switching unit 310 closed. That is, if the main battery pack 110 and/or the auxiliary battery pack 210 is to perform charging and discharging operations, the third switching unit 310 located on the main path must be closed, otherwise, the main battery pack 110 and/or the auxiliary battery pack 210 cannot be charged and discharged. That is, the third switch unit 130 performs a double protection function for charging and discharging the main battery pack 110 and the auxiliary battery pack 210, and also makes a charging and discharging path safer. It should be noted that the first switch unit 120 and the second switch unit 220 are not closed at the same time, so as to ensure the high-voltage safety of the entire vehicle.
Further, in the present embodiment, the first switch unit 120, the second switch unit 220, and the third switch unit 310 may adopt hard switches or soft switches, and are controlled by the control unit 400.
Preferably, the hard switch of the present embodiment employs contactors, as shown in fig. 2 (the drawing only identifies the control unit 400, the first switch unit 120, the second switch unit 220, the third switch unit 310, the main battery pack 110, the auxiliary battery pack 210, and the like), and the first switch unit 120, the second switch unit 220, and the third switch unit 310 are all implemented using contactors: the first switching unit 120 includes switches K11 and K12 composed of contactors; the second switching unit 220 includes switches K21 and K22 composed of contactors; and the third switching unit 310 includes a switch K31 composed of a contactor. The switch K11 controls the opening and closing of the charging and discharging circuit of the main battery pack 110; k12 controls the opening and closing of the pre-charging circuit of the main battery pack 110; the switch K21 controls the opening and closing of the charge and discharge circuit of the auxiliary battery pack 210; the switch K22 controls the opening and closing of the pre-charge circuit of the secondary battery pack 210. The switch K31 is a main switch of a common path, controls charging and discharging of the main battery pack or the auxiliary battery pack, and ensures high-voltage safety of the main battery pack 110 and the auxiliary battery pack 210 under abnormal conditions.
Preferably, the soft switch of the present embodiment employs an IGBT or silicon carbide or the like. As shown in fig. 3 (the drawing only identifies the control unit 400, the first switch unit 120, the second switch unit 220, the third switch unit 310, the main battery pack 110, the auxiliary battery pack 210, and the like), the first switch unit 120 and the second switch unit 220 are implemented by using IGBTs or silicon carbide and cooperating with a current storage diode, and the third switch unit 310 is implemented by using a contactor: the first switching unit 120 includes switches S11 and S12; the second switching unit 220 includes switches S21 and S22; and the third switching unit 310 includes a switch K31. Wherein, the switch S11 controls the opening and closing of the charge and discharge circuit of the main battery pack 110; s12 controls opening and closing of the precharge circuit of the main battery pack 110; the switch S21 controls the opening and closing of the charge and discharge circuit of the auxiliary battery pack 210; the switch S22 controls the opening and closing of the pre-charge circuit of the secondary battery pack 210.
The first detecting unit 130 is used for detecting relevant information of the main battery pack 110 and/or the first switch unit 120, including but not limited to: temperature, voltage, current, insulation resistance of the main battery pack 110, and an operating state of the first switching unit 120, etc.
The second detecting unit 230 is used for detecting the related information of the auxiliary battery pack 210 and/or the second switch unit 220, including but not limited to: temperature, voltage, current, insulation resistance of the auxiliary battery pack 210, and an operation state of the second switching unit 220, etc.
The common detection unit 320 is used for detecting the related information of the common path, including but not limited to: voltage, current of the common path, and operation state of the third switching unit 310.
It should be noted that the first detecting unit 130, the second detecting unit 230, and the common detecting unit 320 in this embodiment are not a single device or a chip, and are implemented by combining a plurality of chips, and the detection of the voltage and the current and the detection of the operating state of the switch unit are well known to those skilled in the art, and will not be described herein again. In addition, for the main battery pack 110 and the auxiliary battery pack 210, according to the temperature conditions detected by the first detection unit 130 and the second detection unit 230, when the temperature is too high, corresponding cooling treatment is performed on the main battery pack 110 and/or the auxiliary battery pack 210 to ensure the normal operation of the main battery pack 110 and/or the auxiliary battery pack 210.
The control unit 400 is connected to the first switching unit 120, the second switching unit 220, the third switching unit 310, the first detection unit 130, the second detection unit 230, and the common detection unit 320, and is used to detect the auxiliary battery pack 210 and control the opening and closing of the first switching unit 120, the second switching unit 220, and the third switching unit 310. Transmission lines for the control signal and the data signal of the present embodiment are shown by dotted lines in fig. 1. In addition, the control unit 400 can calculate the electric quantity, the remaining electric quantity, the health status, the remaining energy, and the like of the main battery pack 110 and/or the auxiliary battery pack through the detection data provided by the first detection unit 130 and the second detection unit 230, and based on this, precisely control the first switch unit 120 and the second switch unit 220, so as to precisely manage the charging and discharging of the main battery pack 110 or the auxiliary battery pack 210.
In the dual-source battery pack of the present embodiment, since the auxiliary battery pack compartment 240 is replaceable, the auxiliary battery pack compartment 240 is checked at the time of starting operation to ensure whether the auxiliary battery pack compartment 240 is well installed. Moreover, for the accuracy of detection, each secondary battery pack compartment 240 is also provided with a second storage unit 250 for storing the related data of the corresponding secondary battery pack 210 for reference by the control unit 400. The related data is divided into permanent data and real-time data; by permanent data is meant intrinsic parameter data of the battery pack including, but not limited to: production time of the battery pack, battery pack number, battery type, maximum allowed charging voltage, minimum allowed discharging voltage, maximum allowed charging current, maximum allowed discharging power, and the like; by real-time data is meant data of the battery pack prior to the last power outage, including but not limited to: power-off time, fault information, remaining capacity, battery health, total voltage, cell voltage, etc.
The detection of the auxiliary battery pack 240 by the control unit 400 depends on the detection result of the voltage of the auxiliary battery pack 210 by the second detection unit 230 and the detection result of the voltage of the common path by the common detection unit 320, in addition to the relevant data stored in the second storage unit 250. Only when the voltage of the auxiliary battery pack 210 of the auxiliary battery pack compartment 240 is detected to be the same as the voltage of the common path, it is determined that the auxiliary battery pack compartment 240 is well mounted, otherwise, the control unit 400 prompts an early warning.
The control of the first switching unit 120, the second switching unit 220, and the third switching unit 310 by the control unit 400 is achieved by the following two ways:
first, the control unit 400 further comprises a communication subunit (not shown in the figures). Sending related detection information to external equipment by using a communication subunit under a CAN (controller area Network); receive the control command transmitted from the external device, and then control the first switch unit 120, the second switch unit 220, and the third switch unit 310 according to the control command.
Second, the control unit 400 determines itself according to the detection results of the first detection unit 130, the second detection unit 230, and the common detection unit 320 to control the first switch unit 120, the second switch unit 220, and the third switch unit 310. In this way, in order to cooperate with the control unit 400, a first storage unit 150 connected to the control unit 400 and the main battery pack 110 is further configured in the main battery compartment 140, and is used for storing preset parameters and related data of the main battery pack 110. The related data of the main battery pack 110 is the same as the related data of the auxiliary battery pack 210. The control unit 400 is a chip having a data processing function, and processes and judges the detection results of the first detection unit 130, the second detection unit 230, and the common detection unit 320, and/or the data stored in the first storage unit 150 and the second storage unit 250, thereby further controlling the first switch unit 120, the second switch unit 220, and the third switch unit 310. For example:
in the discharging process, when the first detecting unit 130 detects that the remaining capacity of the main battery pack 110 is smaller than the remaining capacity preset threshold (pre-stored in the first storage unit 150) or the main battery pack 110 fails, the control unit 400 controls the first switch unit 120 to be turned off and the second switch unit 220 to be turned on, so that the auxiliary battery pack 210 takes over the main battery pack 110 to continue discharging until the discharging cut-off voltage;
in the intelligent charging process, when the first detection unit 130 detects that the remaining capacity of the main battery pack 110 reaches the main battery pack intelligent charging threshold (pre-stored in the first storage unit 150), and if the remaining capacity is 85%, the control unit 400 controls the first switch unit 120 to be turned off, and the second switch unit 220 to be turned on, the main battery pack 110 ends the charging state, and the auxiliary battery pack 210 enters the charging state; when the second detection unit 230 detects that the remaining power of the auxiliary battery pack 210 reaches the auxiliary battery pack intelligent charging threshold (pre-stored in the first storage unit 150), and if it is 80%, the control unit 400 controls the second switch unit 220 to be turned off, the first switch unit 120 to be turned on, the charging state of the auxiliary battery pack 210 is ended, the main battery pack 110 is continuously charged, and so on, until the power of the main battery pack 110 and the power of the auxiliary battery pack 210 are completely charged;
in the using process, if the control unit 400 reads that the battery health status stored in the second storage unit 250 is in problem, it will control the second switch unit 220 to be turned off, and stop using the auxiliary battery pack 210.
In addition, in order to highlight the innovative part of the present invention, a unit which is not so closely related to solve the technical problem proposed by the present invention is not introduced in the present embodiment, but this does not indicate that there is no other unit in the present embodiment.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example 2
The embodiment discloses a management method of a dual-source battery pack, which is applied to a Vehicle Control Unit (Vehicle Control Unit) of an electric Vehicle using the dual-source battery pack in embodiment 1 to manage a main battery pack bin and an auxiliary battery pack bin of the dual-source battery pack.
As shown in fig. 4, the management method of the dual-source battery pack of the present embodiment includes:
step S41, receiving a driving range demand of the driver:
the driver inputs his predicted driving range requirement through the panel of the vehicle control unit. For example, drivers today intend to drive themselves to and from suzhou from shanghai, that is, the driving range requirement is around 220 km. It should be noted that, the receiving of the driving range requirement of the driver disclosed in the embodiment is not limited to the case where the driver directly inputs the driving range requirement, and the driver may also input a corresponding destination address, count the required driving range requirement by the navigation device, and provide the required driving range requirement to the vehicle control unit. Therefore, any way that can provide the vehicle control unit with the corresponding driving range requirement is within the protection scope of the present invention.
Step S42, evaluating the driving range requirement of the driver:
when the driving range requirement is smaller than the first range threshold value, prompting that the auxiliary battery pack is not installed, and jumping to the step S44;
when the driving range requirement is larger than the first range threshold value, prompting the installation of an auxiliary battery pack, and jumping to the step S43;
preferably, in order to achieve a more precise management of the dual-source battery pack, therefore, after the driving range requirement and the first range threshold are evaluated, the driving range requirement and the second range threshold are evaluated again, namely:
when the driving range requirement is smaller than a second range threshold value, prompting to install an auxiliary battery compartment with low electric quantity; and jumps to step S42;
when the driving range requirement is larger than a second range threshold value, prompting to install an auxiliary battery compartment with high electric quantity; and jumps to step S42.
In the present embodiment, the first mileage threshold value and the second mileage threshold value are preset based on the average mileage statistic value of the electric vehicle per day. Preferably, the first mile threshold is 150 kilometers and the second mile threshold is 250 kilometers.
Since the auxiliary battery compartment of the separated dual-source battery pack of embodiment 1 is detachable, and the main battery pack can generally meet the driving range requirement of 150km, when the driving range is less than the first range threshold, the auxiliary battery compartment does not need to be additionally installed. And, according to the mileage requirement of traveling of difference, can indicate the battery package storehouse that the installation possesses different electric quantities as supplementary battery package storehouse. For example, since the driving range is required to be 220 km when the vehicle is driven to and fro Suzhou in Shanghai, the requirement can be met only by a low-battery auxiliary battery pack.
Step S43, detecting whether the auxiliary battery pack bin is well installed by using the control unit of the double-source battery pack:
if the installation is good, jumping to step S44;
and if the installation is not good, prompting early warning.
The detection of the auxiliary battery compartment by the control unit of the dual-source battery pack is described in detail in embodiment 1 and will not be written herein.
And step S44, adjusting the power output of the double-source battery pack, wherein different auxiliary battery pack bins have different weights, and when the auxiliary battery pack bin is not installed or the auxiliary battery pack bin with low electric quantity is installed, the system can reduce the output power in a self-adaptive manner, reduce the energy loss under the condition of not influencing the dynamic property and increase the driving range. .
The adjusting of the power output of the dual-source battery pack comprises adjusting the power output of the main battery pack and the power output of the auxiliary battery pack.
The steps of the above method are divided for clarity of description, and may be combined into one step or split into some steps, and the steps are decomposed into multiple steps, so long as the steps contain the same logical relationship, which is within the protection scope of the patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
Example 3
The embodiment discloses a management system of a dual-source battery pack, which is applied to a vehicle control unit of an electric vehicle using the dual-source battery pack according to embodiment 1. And the management system of the dual-source battery pack is connected with the dual-source battery pack.
As shown in fig. 5, the management system of the battery pack of the present embodiment includes: the system comprises a receiving module 510, a judging control module 520, an installation detection module 530, an adjusting module 540, a prompt early warning module 550 and a storage module 560.
The receiving module 510 is configured to receive a driving range requirement provided by a driver;
the evaluation control module 520 is configured to evaluate the driving range requirement:
when the driving range requirement is smaller than the first range threshold value, the auxiliary battery pack bin is not installed;
when the driving range requirement is between the first range threshold and the second range threshold, the installation of the auxiliary battery compartment with low electric quantity is prompted through the prompt early warning module 550;
when the driving range requirement is greater than the second range threshold, the installation of the auxiliary battery compartment with high electric quantity is prompted through the prompt early warning module 550.
The detection module 530 is configured to detect whether the auxiliary battery pack compartment is installed well by using the control unit of the dual-source battery pack, and perform an early warning through the prompt early warning module 550 when it is detected that the auxiliary battery pack compartment is not installed well.
The adjusting module 540 is used for adjusting the power output of the dual-source battery pack.
The prompt and early warning module 550 is used for providing corresponding prompts and early warnings for the driver. For example; and prompting the installation of the auxiliary battery pack with low electric quantity, the non-installation of the auxiliary battery pack, and the like.
The storage module 560 is used for saving a preset first mileage threshold and a preset second mileage threshold.
In addition, in order to highlight the innovative part of the present invention, a unit which is not so closely related to solve the technical problem proposed by the present invention is not introduced in the present embodiment, but this does not indicate that there is no other unit in the present embodiment.
It should be noted that the present embodiment is a system embodiment corresponding to the second embodiment, and the present embodiment and the second embodiment can be implemented in cooperation. The related technical details mentioned in the second embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the second embodiment.
In summary, according to the dual-source battery pack, the management method and the system, and the electric vehicle, the battery packs with different electric core standards are respectively used as the main battery pack and the auxiliary battery pack, the main battery pack and the auxiliary battery pack are respectively arranged in the corresponding battery pack bins, and the auxiliary battery pack bins are detachably mounted in the electric vehicle. Because the auxiliary battery pack bin is detachable, the double-source battery pack is managed according to the driving range requirement of a driver, and the auxiliary battery pack bins of the auxiliary battery packs with different electric quantities are prompted to be installed according to different driving range requirements, so that the main battery pack bin of the double-source battery pack can be flexibly combined with different auxiliary battery pack bins to meet different driving ranges, the driving range requirement of the driver is met in a self-adaptive manner, the anxiety of automobile electric energy supply is eliminated, the overall cost of a power battery system of the electric automobile is reduced, and the overall competitiveness of the whole automobile is enhanced. In addition, main battery package and supplementary battery package carry out the charge-discharge with corresponding switch unit to make main battery package and supplementary battery package supply power for electric automobile more rationally, strengthened the safety redundancy, even a battery package breaks down, the driver also can be with the car to the destination or 4S maintenance. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (14)
1. The utility model provides a dual-source battery package which characterized in that is applied to electric automobile, dual-source battery package includes: the main battery pack bin and the auxiliary battery pack bin;
the main battery pack bin comprises a main battery pack and a first switch unit; the auxiliary battery pack bin comprises an auxiliary battery pack and a second switch unit; the auxiliary battery pack bin is detachably arranged in the electric automobile through a mechanical quick-change structure and is connected with the main battery pack bin;
the main battery pack and the auxiliary battery pack are connected in parallel to form a charging and discharging path of the main battery pack and/or the auxiliary battery pack; the charging and discharging path consists of a main path special for charging and discharging the main battery pack, an auxiliary path special for charging and discharging the auxiliary battery pack and a common path for charging and discharging the main battery pack and the auxiliary battery pack together;
a first switching unit disposed on the main path and controlling charging and discharging of the main battery pack;
a second switch unit disposed on the auxiliary path and controlling charging and discharging of the auxiliary battery pack;
and the battery cell standards of the main battery pack and the auxiliary battery pack are different.
2. The dual source battery pack of claim 1, wherein: the cell standard comprises: shape, material, rated voltage, capacity, production time.
3. The dual source battery pack of claim 1, wherein: the auxiliary battery pack bin comprising the auxiliary battery pack and the second switch unit is selectively installed according to actual driving range requirements.
4. The dual source battery pack of claim 1, wherein:
the main battery pack further comprises a first detection unit, a third switch unit, a common detection unit and a first storage unit; the first detection unit is connected with the main battery pack and used for detecting the temperature, the voltage and/or the current of the main battery pack and the working state of the first switch unit; the third switch unit is arranged on the common path and is used for simultaneously controlling the charging and discharging of the main battery pack and the auxiliary battery pack; the common detection unit is positioned on the common path and used for detecting the voltage and the current of the common path and the working state of the third switching unit; the first storage unit is used for storing relevant data of the main battery pack;
the auxiliary battery pack bin also comprises a second detection unit and a second storage unit; the second detection unit is connected with the auxiliary battery pack and is used for detecting the temperature, the voltage and/or the current of the auxiliary battery pack and the working state of the second switch unit; and the second storage unit is connected with the auxiliary battery pack and used for storing the related data of the auxiliary battery pack.
5. The dual source battery pack of claim 4, wherein: the first switch unit, the second switch unit and the third switch unit adopt soft switches and/or hard switches.
6. The dual source battery pack of claim 4, wherein: the main battery packet storehouse still includes: a control unit;
the control unit is respectively connected with the first switch unit, the second switch unit and the third switch unit and used for receiving control instructions through a CAN network and controlling the first switch unit, the second switch unit and/or the third switch unit to be switched on and off according to the control instructions.
7. The dual source battery pack of claim 4, wherein: the main battery packet storehouse still includes: a control unit;
the control unit is respectively connected with the first detection unit, the second detection unit, the common detection unit, the first switch unit, the second switch unit, the third switch unit, the first storage unit and the second storage unit, and is used for controlling the opening and closing of the first switch unit, the second switch unit and/or the third switch unit according to the detection results of the first detection unit, the second detection unit and/or the common detection unit and/or the storage data of the first storage unit and the second storage unit.
8. An electric vehicle, characterized in that: the electric automobile adopts the double-source battery pack as claimed in any one of claims 1 to 7.
9. A management method of a dual-source battery pack is characterized by comprising the following steps: the auxiliary battery pack bin of the double-source battery pack is detachably mounted in the electric automobile through a mechanical quick-change structure; the management method of the dual-source battery pack comprises the following steps:
step S41, receiving a driving range requirement of a driver;
step S42, evaluating the driving range requirement:
when the driving range requirement is smaller than a preset first range threshold value, the auxiliary battery pack bin is not prompted to be installed, and the step S44 is skipped;
when the driving range requirement is larger than the first range threshold value, prompting to install the auxiliary battery pack bin;
step S43, detecting whether the auxiliary battery pack bin is well installed by using the control unit of the dual-source battery pack: if yes, go to step S44; if not, prompting early warning;
and step S44, adjusting the power output of the dual-source battery pack.
10. The management method of the dual source battery pack according to claim 9, wherein: the step S42 further includes:
continuously judging whether the driving range requirement is greater than a preset second range threshold value, if so, prompting to install the auxiliary battery pack bin with high electric quantity, and then jumping to the step S43; if not, prompting to install the auxiliary battery pack bin with low electric quantity, and then jumping to the step S43.
11. The management method of the dual source battery pack according to claim 9, wherein: the step S44 includes:
adjusting the power output of a main battery pack bin of the double-source battery pack; or,
and adjusting the power output of the main battery pack of the double-source battery pack and the power output of the auxiliary battery pack bin.
12. The management method of the dual source battery pack according to claim 9, wherein: the first mileage threshold value and the second mileage threshold value are preset according to the average daily mileage of the driver.
13. A management system of a dual-source battery pack is characterized in that: the auxiliary battery pack bin of the double-source battery pack is detachably mounted in the electric automobile through a mechanical quick-change structure; the dual-source battery pack management system includes:
the receiving module is used for receiving the driving range requirement provided by the driver;
the evaluation control module is used for evaluating and controlling the driving range requirement according to a preset first range threshold and a preset second range threshold;
the detection module is used for detecting whether the auxiliary battery pack bin is well installed or not by using the control unit of the double-source battery pack;
the prompt early warning module is used for giving a prompt or early warning to a driver according to the judgment control result of the judgment control module and/or the detection result of the detection module;
the adjusting module is used for adjusting the power output of the dual-source battery pack;
and the storage module is used for storing the first mileage threshold value and the second mileage threshold value.
14. The system for managing a dual source battery pack according to claim 13, wherein the adjusting module is configured to adjust a power output of a main battery pack in a main battery pack compartment of the dual source battery pack or adjust power outputs of an auxiliary battery pack in the main battery pack and the auxiliary battery pack compartment.
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