CN114537165B - Lithium battery system, lithium battery control method, readable storage medium, and control device - Google Patents
Lithium battery system, lithium battery control method, readable storage medium, and control device Download PDFInfo
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- CN114537165B CN114537165B CN202210147808.7A CN202210147808A CN114537165B CN 114537165 B CN114537165 B CN 114537165B CN 202210147808 A CN202210147808 A CN 202210147808A CN 114537165 B CN114537165 B CN 114537165B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The embodiment of the application discloses a lithium battery system, a lithium battery control method, a readable storage medium and a control device, and the lithium battery system provided by the embodiment of the application comprises: a first battery module including a plurality of first unit batteries arranged in series; a second battery module including a plurality of second unit cells arranged in series; a first path through which the second battery module is connected in series with the first battery module; and the second battery module is connected with the first battery module in parallel through the second passage. The lithium battery system can improve the overall power output performance of the lithium battery system.
Description
Technical Field
The embodiment of the application relates to the technical field of vehicles, in particular to a lithium battery system, a lithium battery control method, a computer readable storage medium and a control device.
Background
Compared with the power performance of the fuel oil automobile, the power performance of the pure electric automobile gradually decreases along with the decrease of the battery pack capacity, for example, when the battery pack capacity is only 10% of full electric capacity, the output peak power of the pure electric automobile is reduced by about 30% -40%. The power performance of the power battery gradually decreases along with the residual electric quantity, and the influence on the acceleration performance of the whole vehicle is more obvious.
One of the main causes of the decrease in output power is that the capacity and voltage of the power battery gradually decrease from the full-power state to the power feeding state. The power is the product of the battery capacity and the battery voltage, so the power drop of the battery pack is an essential attribute of the current lithium ion power battery.
One of the current solutions is to increase the power of a battery pack, and to increase the number or capacity of individual cells in the battery pack to achieve a large power, thereby improving the power performance over the entire SOC (state of charge) range. The other scheme is to improve the whole vehicle efficiency, including motor efficiency, energy utilization efficiency and the like. The third aspect is to greatly reduce the weight of the whole vehicle, and to reduce the weight of the vehicle body to improve the load on the power battery. However, the current lithium battery system still cannot solve the problem that the power performance of the power battery is reduced when the battery pack capacity is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the present invention provides a lithium battery system.
A second aspect of the present invention provides a lithium battery control method.
A third aspect of the present invention provides a computer-readable storage medium.
A fourth aspect of the present invention provides a control apparatus.
In view of this, there is provided, according to a first aspect of an embodiment of the present application, a lithium battery system including:
a first battery module including a plurality of first unit batteries arranged in series;
a second battery module including a plurality of second unit cells arranged in series;
a first path through which the second battery module is connected in series with the first battery module;
and the second battery module is connected with the first battery module in parallel through the second passage.
In one possible embodiment, the volume ratio of the first battery module to the second battery module is 2 to 50.
In one possible embodiment, the lithium battery system further includes: a control unit, the control unit comprising:
a controller;
the first switch is connected with the controller and arranged on the first passage and used for controlling the opening and closing of the first passage;
and the second switch is connected with the controller and arranged on the second passage and used for controlling the opening and closing of the second passage.
In one possible embodiment, the lithium battery system further includes:
a third battery module;
a third path through which the second battery module is connected in series to the third battery module;
and a fourth passage through which the second battery module is connected in parallel with the third battery module.
In one possible embodiment, the third battery module has a capacity of 100Ah to 200Ah and an electrical quantity of 40kWh to 100kWh.
In a possible embodiment, the first battery module has a capacity of 140Ah to 300Ah and an electrical quantity of 60kWh to 150kWh;
the capacity of the second battery module is 1Ah to 50Ah, and the electric quantity is 5kWh to 30kWh;
according to a second aspect of embodiments of the present application, a lithium battery control method is provided and applied to the lithium battery system described in any one of the foregoing technical solutions, where the lithium battery control method includes:
obtaining the peak power of a lithium battery system;
acquiring power output performance based on the peak power;
discharging through the second battery module in the case that the power output performance is less than a preset value;
discharging through the first battery module in the case where the power output performance is greater than or equal to a preset value.
In a possible embodiment, the preset value is less than or equal to 50%.
According to a third aspect of embodiments of the present application there is provided a computer readable storage medium,
the computer readable storage medium stores a computer program for implementing the lithium battery control method according to any one of the above technical solutions.
According to a fourth aspect of the embodiments of the present application, there is provided a control device, including:
a memory storing a computer program;
a processor executing the computer program;
the processor implements the lithium battery control method according to any one of the above technical solutions when executing the computer program.
Compared with the prior art, the invention at least comprises the following beneficial effects: according to the lithium battery system, the first battery module, the second battery module, the first passage and the second passage are included, when the lithium battery system is used as a power source of a vehicle, electric energy can be output through one of the first battery module and the second battery module, along with the use of the lithium battery system, the electric quantity of the first battery module or the second battery module in a power supply state can be reduced, the power performance of the first battery module or the second battery module in the power supply state is gradually reduced along with the residual electric quantity, and in this case, the other one of the first battery module or the second battery module can be used as a power source of the vehicle, so that kinetic energy is provided for the vehicle through the battery module with low battery power performance, kinetic energy is provided for the vehicle through the battery module with higher electric quantity, and excellent acceleration performance of the vehicle can be guaranteed. Through the setting of first passageway and second passageway for possess between first battery module and the second battery module and establish ties, connect in parallel and disconnect three kinds of communication modes, and then can provide multiple power supply mode through first battery module and second battery module.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural view of a lithium battery system according to an embodiment provided herein;
FIG. 2 is a schematic step flow diagram of a lithium battery control method according to one embodiment provided herein;
FIG. 3 is a block diagram of the architecture of a computer readable storage medium of one embodiment provided herein;
fig. 4 is a block diagram of a control device according to an embodiment of the present application.
The correspondence between the reference numerals and the component names in fig. 1 is:
100 first battery module, 200 second battery module, 300 third battery module, 400 first pass, 500 second pass, 600 third pass.
Detailed Description
In order to better understand the technical solutions described above, the technical solutions of the embodiments of the present application are described in detail below through the accompanying drawings and the specific embodiments, and it should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and not limit the technical solutions of the present application, and the embodiments of the present application and the technical features in the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1, according to a first aspect of an embodiment of the present application, there is provided a lithium battery system, including: the first battery module 100, the first battery module 100 including a plurality of first unit cells arranged in series; the second battery module 200, the second battery module 200 includes a plurality of second unit cells arranged in series; the first path 400, and the second battery module 200 is connected in series to the first battery module 100 through the first path 400; the second passage 500 connects the second battery module 200 to the first battery module 100 in parallel through the second passage 500.
The lithium battery system provided by the embodiment of the application includes the first battery module 100, the second battery module 200, the first path 400 and the second path 500, when the lithium battery system is used as a power source of a vehicle, electric energy can be output through one of the first battery module 100 and the second battery module 200, and as the lithium battery system is used, the electric quantity of the first battery module 100 or the second battery module 200 in a power supply state can be reduced, and as the residual electric quantity, the power performance of the first battery module 100 or the second battery module 200 in the power supply state can be gradually reduced, in this case, the other one of the first battery module 100 or the second battery module 200 can be used as the power source of the vehicle, so that kinetic energy can be provided for the vehicle through the battery module with low battery power performance, and kinetic energy can be provided for the vehicle through the battery module with higher electric quantity, so that the vehicle can be ensured to have excellent acceleration performance. Through the arrangement of the first passage 400 and the second passage 500, three communication modes of series connection, parallel connection and disconnection are provided between the first battery module 100 and the second battery module 200, and then various power supply modes can be provided through the first battery module 100 and the second battery module 200.
In one possible embodiment, the volume ratio of the first battery module 100 to the first battery module 100 is 2 to 50.
The volume ratio of the first battery module 100 to the second battery module 200 is 2 to 50, that is, the volume of the first battery module 100 is larger than the volume of the second battery module 200, and the total electric quantity of the second battery module 200 is lower than the total electric quantity of the first battery module 100, so that the first passage 400 and the second passage 500 are in a disconnection state when the lithium battery system is fully charged in the use process of the lithium battery system, that is, the first battery module 100 and the second battery module 200 are independently arranged at the initial stage of vehicle driving. The first battery module 100 with a large capacity and a long duration outputs energy to a front motor, a rear motor, or both of the motors of the vehicle to drive the vehicle. As the usage time of the first battery module 100 increases, the power output performance of the first battery module 100 decreases as well, and when the power output performance decreases to less than 50% of the initial state, a command may be issued through the controller to require the low-capacity high-power second battery module 200 to enter the operating state and discharge to the driving motor, thereby improving the overall power output performance.
The lithium battery system provided by the embodiment of the application is used as a power source of the electric automobile, so that the high-power output performance in the whole charging and discharging window is realized, and the defect that the power output of the current lithium ion battery gradually drops in the process from a full-power state to a feeding state is overcome;
in the lithium battery system provided by the embodiment of the application, the second battery module 200 has small capacity and small required space, the high-performance power supplementing capability is not realized, and the driving performance of the electric automobile is improved.
In one possible embodiment, the lithium battery system further includes: a control unit including: a controller; the first switch is connected to the controller, is arranged on the first passage 400 and is used for controlling the opening and closing of the first passage 400; and the second switch is connected to the controller, is arranged on the second passage 500 and is used for controlling the opening and closing of the second passage 500.
The lithium battery system further comprises a control unit, the control unit comprises a controller, a first switch and a second switch, the control unit is matched with the first passage 400 and the second passage 500 for use, three connection modes of series connection, parallel connection and disconnection are arranged between the first battery module 100 and the second battery module 200, the first battery module 100 and the second battery module 200 are convenient to charge, and the first battery module 100 and the second battery module 200 are convenient to discharge in various modes.
In one possible embodiment, the lithium battery system further includes: a third battery module 300; a third path 600 through which the second battery module 200 is connected in series to the third battery module 300; the fourth path, through which the second battery module 200 is connected in parallel to the third battery module 300.
The lithium battery system further includes a third battery module 300, a third path 600, and a fourth path. That is, the lithium battery system may include the first battery module 100, the second battery module 200 and the third battery module 300 at the same time, when the lithium battery system is fully charged, kinetic energy may be provided to the vehicle through the first battery module 100 and/or the third battery module 300, and when the electric quantity of the first battery module 100 and/or the third battery module 300 is reduced, power may be provided to the vehicle through the second battery module 200, so that the lithium battery system may always provide kinetic energy to the vehicle through the battery module with more electric quantity in the use process, thereby guaranteeing the overall power output performance.
In some examples, the third battery module 300 may be a super-fast-charged battery module, i.e., the super-fast-charged battery module may charge electrical energy of 30kWh to 70kWh for 2min to 10 min.
In some examples, in the case where the lithium battery system provided in the embodiment of the present application includes the third battery module 300, the volume ratio of the third battery module 300 to the second battery module 200 may be greater than or equal to 10. When the battery system is fully charged, the two battery modules are in an off state, and the third battery module 300 having the super fast charge function outputs energy to the front motor, the rear motor, or both the front and rear motors to drive the vehicle. When the power output performance is reduced below 50% of the initial state, the controller issues a command, and the low-capacity high-power second battery module 200 enters the operating state to discharge the power to the driving motor, thereby improving the overall power output performance.
In one possible embodiment, the capacity of the third battery module 300 is 100Ah to 200Ah, and the amount of electricity is 40kWh to 100kWh.
The capacity of the third battery module 300 is 100Ah to 200Ah, and the electric quantity is 40kWh to 100kWh, so that the third battery module 300 has a strong driving capability, and in the case that the lithium battery system includes the third battery module 300, energy can be provided to the driving system of the vehicle through the third battery module 300 under most conditions, so that the working time of the second battery module 200 is reduced, and the driving performance and the overall power output performance are better.
In one possible embodiment, the capacity of the first battery module 100 is 140Ah to 300Ah, and the amount of electricity is 60kWh to 150kWh; the capacity of the second battery module 200 is 1Ah to 50Ah, and the electric quantity is 5kWh to 30kWh.
The capacity of the first battery module 100 is 140Ah to 300Ah, and the electric quantity is 60kWh to 150kWh, so that the first battery module 100 has strong driving capability, and the lithium battery system can provide energy for the driving system of the vehicle through the first battery module 100 under most conditions, so that the working time of the second battery module 200 is reduced, and the driving performance and the overall power output performance are better. The capacity of the second battery module 200 is 1Ah to 50Ah, the electric quantity is 5kWh to 30kWh, and the capacity and the electric quantity of the second battery module 200 are low, which is beneficial to reducing the volume of the second battery module 200.
It is understood that the amounts of electricity of the first, second and third battery modules 100, 200 and 300 refer to the amounts of electricity when the first, second and third battery modules 100, 200 and 300 are full.
As shown in fig. 2, according to a second aspect of the embodiments of the present application, a lithium battery control method is provided, which is applied to the lithium battery system of any one of the above-mentioned technical solutions, and the lithium battery control method includes:
step 201: and obtaining the peak power of the lithium battery system. It can be understood that the electric quantity of the first battery module in the working state can be obtained, and the electric quantity of the first battery module and the peak power are in a negative correlation relationship, so that the peak power of the lithium battery system can be obtained based on the electric quantity of the first battery module, and the peak power of the lithium battery system is obtained through the electric quantity of the first battery module, so that the obtaining of the peak power is simpler and faster.
Step 202: power output performance is obtained based on the peak power. It is understood that the power output performance refers to a ratio of a peak power obtained based on a current amount of power of the first battery module to a peak power when the first battery module is at full power.
Step 203: in case the power output performance is less than the preset value, discharging is performed through the second battery module. When the power output performance is smaller than the preset value, the power output performance is lower when the electric energy is output through the first battery module, and the power output performance of the whole lithium battery system can be improved through discharging of the second battery module.
Step 204: in the case where the power output performance is greater than or equal to a preset value, discharging is performed through the first battery module. When the power output performance is greater than or equal to the preset value, the power output performance is higher when the electric energy is output through the first battery module, and the power output performance of the whole lithium battery system can be improved through discharging of the first battery module.
In some examples, in the event that the power output performance is less than the preset value, discharging by the second battery module may include: acquiring a first current electric quantity of a second battery module; acquiring a first ratio of the first current electric quantity to the total electric quantity of the second battery module; obtaining a second current electric quantity of the first battery module, obtaining a second ratio of the second current electric quantity to the total electric quantity of the first battery module, discharging through the second battery module when the first ratio is greater than or equal to the second ratio, and continuing discharging through the first battery module when the first ratio is less than the second ratio. The battery module with higher electric quantity can always output electric energy.
In one possible embodiment, the preset value is less than or equal to 50%.
By selecting the preset value, the overall power output performance of the lithium battery system can be improved. If the preset value is greater than 50%, the lithium battery system may use the second battery module to output electric energy at a high frequency, and the volume ratio and the total electric quantity of the second battery module are lower than those of the first battery module, so that the service life of the second battery module will be influenced by discharging through the second battery module for a long time.
As shown in fig. 3, a third aspect according to an embodiment of the present application proposes a computer readable storage medium 301, where the computer readable storage medium 301 stores a computer program 302, to implement a lithium battery control method according to any of the above-mentioned aspects.
The computer readable storage medium 301 provided in the embodiment of the present application realizes the lithium battery control method according to the above technical scheme, so that the computer readable storage medium has all the beneficial effects of the lithium battery control method according to the above technical scheme.
Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.), and includes several instructions for causing a computer device (may be a personal computer, a server, or a network device, etc.) to perform the methods described in various implementation scenarios of the present application.
As shown in fig. 4, a fourth aspect according to an embodiment of the present application proposes a control device, including: a memory 401 storing a computer program; a processor 402 executing a computer program; wherein the processor 402, when executing the computer program, implements the lithium battery control method according to any of the above-mentioned aspects.
The control device provided by the embodiment of the application realizes the lithium battery control method of the technical scheme, so that the control device has all the beneficial effects of the lithium battery control method of the technical scheme.
In some examples, the control device may also include a user interface, a network interface, a camera, radio Frequency (RF) circuitry, sensors, audio circuitry, WI-FI modules, and so forth. The user interface may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), etc.
In an exemplary embodiment, the control apparatus may further include an input-output interface and a display device, wherein the respective functional units may communicate with each other through a bus. The memory stores a computer program, and a processor is configured to execute the program stored in the memory to perform the method in the above embodiment.
The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the physical device hardware and software resources of the above-described methods, supporting the execution of information handling programs and other software and/or programs. The network communication module is used for realizing communication among all components in the storage medium and communication with other hardware and software in the information processing entity equipment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the present application may be implemented by means of software plus necessary general hardware platforms, or may be implemented by hardware.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The lithium battery control method is characterized by being applied to a lithium battery system, wherein the lithium battery system comprises a first battery module, and the first battery module comprises a plurality of first single batteries which are arranged in series; a second battery module including a plurality of second unit cells arranged in series; a first path through which the second battery module is connected in series with the first battery module; a second passage through which the second battery module is connected in parallel to the first battery module,
the lithium battery control method comprises the following steps:
obtaining the peak power of a lithium battery system;
acquiring power output performance based on the peak power, wherein the power output performance refers to the ratio of the peak power acquired based on the current electric quantity of the first battery module to the peak power of the first battery module when the first battery module is at full power;
discharging through the second battery module in the case that the power output performance is less than a preset value;
and discharging through the second battery module when the power output performance is smaller than a preset value, comprising:
in the case where the power output performance is less than the preset value, discharging by the second battery module includes: acquiring a first current electric quantity of a second battery module; acquiring a first ratio of the first current electric quantity to the total electric quantity of the second battery module; acquiring a second current electric quantity of the first battery module, acquiring a second ratio of the second current electric quantity to the total electric quantity of the first battery module, and discharging through the second battery module under the condition that the first ratio is greater than or equal to the second ratio;
discharging through the first battery module in the case where the power output performance is greater than or equal to a preset value.
2. The method for controlling a lithium battery according to claim 1, wherein,
the value of the preset value is less than or equal to 50%.
3. A lithium battery system employing the lithium battery control method according to claim 1 or 2, the system comprising:
a first battery module including a plurality of first unit batteries arranged in series;
a second battery module including a plurality of second unit cells arranged in series;
a first path through which the second battery module is connected in series with the first battery module;
and the second battery module is connected with the first battery module in parallel through the second passage.
4. The lithium battery system of claim 3, wherein the battery system further comprises a battery module,
the volume ratio of the first battery module to the second battery module is 2 to 50.
5. The lithium battery system of claim 3, further comprising: a control unit, the control unit comprising:
a controller;
the first switch is connected with the controller and arranged on the first passage and used for controlling the opening and closing of the first passage;
and the second switch is connected with the controller and arranged on the second passage and used for controlling the opening and closing of the second passage.
6. The lithium battery system according to any one of claims 3 to 5, further comprising:
a third battery module;
a third path through which the second battery module is connected in series to the third battery module;
and a fourth passage through which the second battery module is connected in parallel with the third battery module.
7. The lithium battery system of claim 6, wherein the battery system further comprises a battery module,
the capacity of the third battery module is 100Ah to 200Ah, and the electric quantity is 40kWh to 100kWh.
8. The lithium battery system according to any one of claim 3 to 5, wherein,
the capacity of the first battery module is 140Ah to 300Ah, and the electric quantity is 60kWh to 150kWh;
the capacity of the second battery module is 1Ah to 50Ah, and the electric quantity is 5kWh to 30kWh.
9. A computer-readable storage medium comprising,
the computer-readable storage medium stores a computer program for implementing the lithium battery control method according to claim 1 or 2.
10. A control apparatus, characterized by comprising:
a memory storing a computer program;
a processor executing the computer program;
wherein the processor, when executing the computer program, implements the lithium battery control method according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147808.7A CN114537165B (en) | 2022-02-17 | 2022-02-17 | Lithium battery system, lithium battery control method, readable storage medium, and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210147808.7A CN114537165B (en) | 2022-02-17 | 2022-02-17 | Lithium battery system, lithium battery control method, readable storage medium, and control device |
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