CN114537165A - 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 PDF

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Publication number
CN114537165A
CN114537165A CN202210147808.7A CN202210147808A CN114537165A CN 114537165 A CN114537165 A CN 114537165A CN 202210147808 A CN202210147808 A CN 202210147808A CN 114537165 A CN114537165 A CN 114537165A
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China
Prior art keywords
battery module
lithium battery
battery
lithium
battery system
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CN202210147808.7A
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Chinese (zh)
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CN114537165B (en
Inventor
朱金鑫
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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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
    • 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]
    • 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
    • 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
    • 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)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (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 cells arranged in series; a second battery module including a plurality of second unit batteries arranged in series; a first path through which the second battery module is connected in series to the first battery module; a second path through which the second battery module is connected in parallel to the first battery module. The lithium battery system can improve the overall power output performance of the lithium battery system.

Description

Lithium battery system, lithium battery control method, readable storage medium and control device
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 a fuel automobile, the power performance of the pure electric automobile is gradually reduced along with the reduction of the electric quantity of the battery pack, for example, when the electric quantity of the battery pack is only 10% of the full electric quantity, the peak power output by the pure electric automobile is reduced by about 30% -40%. The power performance of the power battery is gradually reduced 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 output power reduction is that the capacity and voltage of the power battery are gradually reduced from a full-power state to a power-feeding state. The power is the product of the battery capacity and the battery voltage, so that the power drop of the battery pack is the essential property of the current lithium ion power battery.
One of the current solutions is to increase the electric quantity of a battery pack, and increase the number or capacity of individual electric cores in the battery pack to achieve a large electric quantity, so as to improve the power performance in the whole SOC interval (SOC) range. The other scheme is to improve the efficiency of the whole vehicle, including the efficiency of a motor, the utilization efficiency of energy and the like. The third proposal is to greatly reduce the weight of the whole vehicle, and reduce the weight of the vehicle body to improve the demand load of the power battery. However, the conventional lithium battery system cannot solve the problem that the power performance of the power battery is reduced when the electric quantity of the battery pack is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a lithium battery system.
The second aspect of the invention provides a lithium battery control method.
A third aspect of the invention provides a computer-readable storage medium.
A fourth aspect of the invention provides a control apparatus.
In view of this, according to a first aspect of embodiments of the present application, there is provided a lithium battery system, including:
a first battery module including a plurality of first cells arranged in series;
a second battery module including a plurality of second unit batteries arranged in series;
a first path through which the second battery module is connected in series to the first battery module;
a second path through which the second battery module is connected in parallel to the first battery module.
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 to the controller, arranged on the first passage and used for controlling the opening and closing of the first passage;
and the second switch is connected to the controller, 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 passage through which the second battery module is connected in series to the third battery module;
and a fourth path through which the second battery module is connected in parallel to the third battery module.
In one possible embodiment, the third battery module has a capacity of 100Ah to 200Ah and a charge of 40kWh to 100 kWh.
In one possible embodiment, the first battery module has a capacity of 140Ah to 300Ah, and a charge of 60kWh to 150 kWh;
the capacity of the second battery module is 1Ah to 50Ah, and the electric quantity is 5kWh to 30 kWh;
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 according to any one of the above technical solutions, and the lithium battery control method includes:
acquiring the peak power of the lithium battery system;
obtaining a power output performance based on the peak power;
discharging through the second battery module when the power output performance is less than a preset value;
and discharging through the first battery module when the power output performance is greater than or equal to a preset value.
In a possible embodiment, the value of the preset value is less than or equal to 50%.
According to a third aspect of embodiments herein there is provided a computer readable storage medium,
the computer-readable storage medium stores a computer program to implement the lithium battery control method according to any one of the above technical solutions.
According to a fourth aspect of an embodiment of the present application, there is provided a control apparatus including:
a memory storing a computer program;
a processor executing the computer program;
wherein, 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: the lithium battery system provided by the embodiment of the application comprises a first battery module, a second battery module, a first passage and a second passage, 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, the electric quantity of the first battery module or the second battery module in a power supply state is reduced along with the use of the lithium battery system, the battery 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, in this case it is possible to use the other of the first battery module or the second battery module as a power source of the vehicle, the vehicle is prevented from being provided with kinetic energy through the battery module with low battery power performance, and kinetic energy is provided for the vehicle through the battery module with high electric quantity, so that the excellent acceleration performance of the vehicle can be guaranteed. Through the arrangement of the first passage and the second passage, three communication modes of series connection, parallel connection and disconnection are realized between the first battery module and the second battery module, and then multiple power supply modes can be provided through the first battery module and the 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 refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a lithium battery system according to an embodiment provided herein;
FIG. 2 is a flow chart illustrating exemplary steps of a lithium battery control method according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of a computer-readable storage medium according to an embodiment provided herein;
fig. 4 is a block diagram of a control device according to an embodiment of the present disclosure.
Wherein, the corresponding relation between the reference numbers and the part 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 with reference to the drawings and the specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present application are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and 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 embodiments of the present application, there is provided a lithium battery system, including: a first battery module 100, the first battery module 100 including a plurality of first unit cells arranged in series; a second battery module 200, the second battery module 200 including a plurality of second unit cells arranged in series; a first path 400 through which the second battery module 200 is connected in series to the first battery module 100; and a second path 500 through which the second battery module 200 is connected in parallel to the first battery module 100.
The lithium battery system provided by the embodiment of the present application includes a first battery module 100, a second battery module 200, a first passage 400 and a second passage 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, the electric quantity of the first battery module 100 or the second battery module 200 in the power supply state will decrease along with the use of the lithium battery system, the battery power performance of the first battery module 100 or the second battery module 200 in the power supply state gradually decreases along with the residual electric quantity, in this case it is possible to use the other of the first or second battery modules 100 or 200 as a power source of the vehicle, the vehicle is prevented from being provided with kinetic energy through the battery module with low battery power performance, and kinetic energy is provided for the vehicle through the battery module with high electric quantity, so that the excellent acceleration performance of the vehicle can be guaranteed. 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 a plurality of 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 greater than that of the second battery module 200, and the total electric quantity of the second battery module 200 is lower than that of the first battery module 100, so that when the lithium battery system is fully charged during the use of the lithium battery system, the first passage 400 and the second passage 500 are in an off state, that is, the first battery module 100 and the second battery module 200 are independently arranged, and are in the initial driving stage of the vehicle. The first battery module 100 having a large capacity and a long endurance outputs energy to a front motor, a rear motor, or a front and rear motor of the vehicle to drive the vehicle. As the service time of the first battery module 100 increases, the electric quantity of the first battery module 100 decreases, and the power output performance of the first battery module 100 also decreases, and when the power output performance decreases to less than 50% of the initial state, the controller may send an instruction to request the second battery module 200 with small capacity and high power to enter a working state, and discharge power 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 charge and discharge window is realized, and the defect that the power output of the current lithium ion battery is gradually reduced in the process from a full-charge state to a feed state is overcome;
the lithium battery system provided by the embodiment of the application has the advantages that the capacity of the second battery module 200 is small, the required space is small, the high-performance power supplement 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, the control unit comprising: a controller; a first switch connected to the controller, disposed on the first path 400, and configured to control opening and closing of the first path 400; and a second switch, connected to the controller, disposed on the second path 500, for controlling the opening and closing of the second path 500.
The lithium battery system further comprises a control unit, the control unit comprises a controller, a first switch and a second switch, and the control unit is matched with the first passage 400 and the second passage 500 for use, so that three connection modes of series connection, parallel connection and disconnection are realized between the first battery module 100 and the second battery module 200, the first battery module 100 and the second battery module 200 can be conveniently charged, and the first battery module 100 and the second battery module 200 can be conveniently discharged in multiple 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; and a 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 simultaneously include the first battery module 100, the second battery module 200, and the third battery module 300, after 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 a large electric quantity in the use process, thereby ensuring the overall power output performance.
In some examples, the third battery module 300 may be a super fast-charge battery module, i.e., the super fast-charge battery module may be charged with electric energy of 30kWh to 70kWh for 2min to 10 min.
In some examples, where the lithium battery system provided in the embodiments 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 rapid charging function outputs energy to the front motor, the rear motor, or the front and rear motors to drive the vehicle. When the power output performance is reduced to less than 50% of the initial state, the controller sends an instruction, and the second battery module 200 with small capacity and high power enters a working state to discharge to the driving motor, thereby improving the overall power output performance.
In one possible embodiment, the third battery module 300 has a capacity of 100Ah to 200Ah and a capacity of 40kWh to 100 kWh.
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 when 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 circumstances, thereby reducing the working time of the second battery module 200, and the driving performance and the overall power output performance are better.
In one possible embodiment, the first battery module 100 has a capacity of 140Ah to 300Ah, and a charge of 60kWh to 150 kWh; the capacity of the second battery module 200 is 1Ah to 50Ah, and the capacity is 5kWh to 30 kWh.
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 a strong driving capability, and the lithium battery system can provide energy to a driving system of a vehicle through the first battery module 100 under most circumstances, thereby reducing the working time of the second battery module 200, and having better driving performance and overall power output performance. The capacity of the second battery module 200 is 1Ah to 50Ah, the capacity of the second battery module 200 is 5kWh to 30kWh, and the capacity of the second battery module 200 are low, which is advantageous for reducing the volume of the second battery module 200.
It is understood that the charge amounts of the first, second, and third battery modules 100, 200, and 300 refer to charge amounts of the first, second, and third battery modules 100, 200, and 300 when they are fully charged.
As shown in fig. 2, according to a second aspect of the embodiment of the present application, a lithium battery control method is provided, which is applied to the lithium battery system in any of the above technical solutions, and the lithium battery control method includes:
step 201: and acquiring 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 acquired, the electric quantity of the first battery module is in a negative correlation with the peak power, so that the peak power of the lithium battery system can be acquired based on the electric quantity of the first battery module, and the peak power of the lithium battery system is acquired through the electric quantity of the first battery module, so that the acquisition of the peak power is simpler and quicker.
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 electricity of the first battery module to a peak power of the first battery module when the first battery module is fully charged.
Step 203: and discharging through the second battery module under the condition that the power output performance is less than the preset value. Under the condition that the power output performance is smaller than the preset value, the power output performance is lower when the first battery module outputs electric energy, and under the condition, the power output performance of the whole lithium battery system can be improved through the discharge of the second battery module.
Step 204: and discharging through the first battery module when the power output performance is greater than or equal to a preset value. When the power output performance is greater than or equal to the preset value, the power output performance is higher when the first battery module outputs electric energy, and the overall power output performance of the lithium battery system can be improved by discharging through the first battery module under the condition.
In some examples, in the case where the power output performance is less than the preset value, discharging through the second battery module may include: acquiring 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; the method comprises the steps of obtaining second current electric quantity of a first battery module, obtaining a second ratio of the second current electric quantity to total electric quantity of the first battery module, discharging through the second battery module when the first ratio is larger than or equal to the second ratio, and continuing discharging through the first battery module when the first ratio is smaller than the second ratio. So set up can be all the time through the battery module output electric energy of higher electric quantity.
In a possible embodiment, the preset value takes a value less than or equal to 50%.
Through the selection of 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 frequently use the second battery module to output electric energy, 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 long-term discharge through the second battery module will affect the service life of the second battery module.
As shown in fig. 3, according to a third aspect of the embodiment of the present application, a computer-readable storage medium 301 is provided, where the computer-readable storage medium 301 stores a computer program 302, and implements the method for controlling a lithium battery according to any of the above technical solutions.
The computer-readable storage medium 301 provided in the embodiment of the present application implements the lithium battery control method in the foregoing technical solution, so that the computer-readable storage medium has all the beneficial effects of the lithium battery control method in the foregoing technical solution.
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 (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the implementation scenarios of the present application.
As shown in fig. 4, according to a fourth aspect of the embodiment of the present application, there is provided a control apparatus including: a memory 401 storing a computer program; a processor 402 executing a computer program; when executing the computer program, the processor 402 implements the lithium battery control method according to any of the above technical solutions.
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, a WI-FI module, 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 computer programs, and the processor is used for executing the programs stored in the memory and executing the method in the embodiment.
The storage medium may further 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 method, supporting the execution of information processing programs and other software and/or programs. The network communication module is used for realizing communication among components in the storage medium and communication with other hardware and software in the information processing entity device.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus a necessary general hardware platform, and can also 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 invention. In this specification, the schematic representations of the terms used above 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, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A lithium battery system, comprising:
a first battery module including a plurality of first cells arranged in series;
a second battery module including a plurality of second cells arranged in series;
a first path through which the second battery module is connected in series to the first battery module;
a second path through which the second battery module is connected in parallel to the first battery module.
2. The lithium battery system as recited in claim 1,
the volume ratio of the first battery module to the second battery module is 2 to 50.
3. The lithium battery system as claimed in claim 1, further comprising: a control unit, the control unit comprising:
a controller;
the first switch is connected to the controller, arranged on the first passage and used for controlling the opening and closing of the first passage;
and the second switch is connected to the controller, arranged on the second passage and used for controlling the opening and closing of the second passage.
4. A lithium battery system as claimed in any one of claims 1 to 3, characterized in that it further comprises:
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 path through which the second battery module is connected in parallel to the third battery module.
5. Lithium battery system according to claim 4,
the capacity of the third battery module is 100Ah to 200Ah, and the electric quantity is 40kWh to 100 kWh.
6. Lithium battery system according to any of claims 1 to 3,
the capacity of the first battery module is 140Ah to 300Ah, and the electric quantity is 60kWh to 150 kWh;
the capacity of the second battery module is 1Ah to 50Ah, and the electric quantity is 5kWh to 30 kWh.
7. A lithium battery control method applied to the lithium battery system according to any one of claims 1 to 6, the lithium battery control method comprising:
acquiring the peak power of the lithium battery system;
obtaining a power output performance based on the peak power;
discharging through the second battery module when the power output performance is less than a preset value;
and discharging through the first battery module when the power output performance is greater than or equal to a preset value.
8. The lithium battery control method as claimed in claim 7,
the value of the preset value is less than or equal to 50%.
9. A computer-readable storage medium, comprising,
the computer-readable storage medium stores a computer program implementing the lithium battery control method according to claim 7 or 8.
10. A control device, 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 of claim 7 or 8.
CN202210147808.7A 2022-02-17 2022-02-17 Lithium battery system, lithium battery control method, readable storage medium, and control device Active CN114537165B (en)

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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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