Ternary lithium-ion battery preheating charging method, device, equipment and storage medium

Abstract

The present invention relates to the field of vehicle charging technology, and discloses a method, device, equipment, and storage medium for preheating and charging a ternary lithium-ion battery. The method comprises: collecting current data of the ternary lithium-ion battery and the current external ambient temperature; analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery; and determining the optimal preheating method and optimal charging temperature of the ternary lithium-ion battery under the current circumstances based on the health status of the ternary lithium-ion battery and the current external ambient temperature. The present invention collects the current data of the ternary lithium-ion battery and the current external ambient temperature to determine the health status of the battery, and determines the optimal preheating method and optimal charging temperature based on the health status and the current external ambient temperature. This solves the problem that existing preheating methods cause waste of resources and affect the health status of the battery, improves battery preheating efficiency, reduces power consumption, reduces the adverse effects of high-rate preheating, and increases battery life.

Description

Technical Field

[0001] The present invention relates to the field of vehicle charging technology, and in particular to a method, device, equipment and storage medium for preheating and charging a ternary lithium-ion battery. Background Art

[0002] As the number of electric vehicles continues to rise, various safety and technical issues are becoming increasingly prominent. Batteries are a core component of electric vehicles and are crucial to their development. However, a large number of safety incidents in recent years have necessitated the increased attention paid to the safety management of power batteries. Ternary lithium-ion batteries, with their superior power performance, high energy density, low self-discharge rate, and long shelf life, have become the primary power battery for new energy vehicles. Despite their numerous advantages, low temperatures can degrade the kinetic performance of the battery's positive and negative electrodes. This increases electrolyte viscosity, decreases conductivity, and reduces Li+ migration activity between the positive and negative electrodes, significantly reducing the battery's available capacity and power, making charging difficult. Consequently, extremely cold conditions can result in low charging currents and slower charging speeds. my country's winters are long and cold, making charging in freezing conditions unavoidable. This has significantly limited the development of new energy vehicles in Northeast China.

[0003] Preheating batteries at low temperatures is an effective way to improve battery performance. However, existing preheating methods often involve installing preheating and insulation devices around the battery. This not only wastes energy but also affects battery health, resulting in unnecessary power consumption during charging and increasing safety risks. Summary of the Invention

[0004] The main purpose of the present invention is to provide a method, device, equipment and storage medium for preheating and charging a ternary lithium-ion battery, aiming to solve the technical problem that the preheating method of the existing technology causes waste of resources and affects the health status of the battery.

[0005] To achieve the above object, the present invention provides a method for preheating and charging a ternary lithium-ion battery, the method comprising the following steps:

[0006] Collect the current data of the ternary lithium-ion battery and the current external ambient temperature;

[0007] Analyzing current data of the ternary lithium-ion battery to determine a health status of the ternary lithium-ion battery;

[0008] The optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances are determined according to the health status of the ternary lithium-ion battery and the current external ambient temperature.

[0009] Optionally, the current data of the ternary lithium-ion battery includes a current voltage, a current temperature, and a current charge of the ternary lithium-ion battery, and analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery includes:

[0010] Obtaining the rated capacity of the ternary lithium-ion battery;

[0011] Determining the current capacity of the ternary lithium-ion battery according to the current voltage, current temperature, and current power of the ternary lithium-ion battery;

[0012] The health state of the ternary lithium-ion battery is calculated according to the rated capacity of the ternary lithium-ion battery and the current capacity of the ternary lithium-ion battery.

[0013] Optionally, determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current external ambient temperature includes:

[0014] Determining an initial preheating method according to the health status of the ternary lithium-ion battery;

[0015] Determining an optimal preheating method according to the current external ambient temperature and the initial preheating method;

[0016] The optimal charging temperature is determined according to the health status of the ternary lithium-ion battery and the optimal preheating method.

[0017] Optionally, the initial preheating mode includes external preheating, internal preheating, and combined preheating, and determining the optimal preheating mode according to the current external ambient temperature and the initial preheating mode includes:

[0018] When the current external ambient temperature is greater than or equal to a first preset temperature, internal preheating is used as the optimal preheating method;

[0019] When the current external ambient temperature is less than or equal to a second preset temperature, external preheating is used as the optimal preheating method;

[0020] When the current external environment temperature is greater than the second preset temperature and less than the first preset temperature, composite preheating is used as the optimal preheating method, wherein the first preset temperature is greater than the second preset temperature.

[0021] Optionally, before analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery, the method further includes:

[0022] Determining whether the ternary lithium-ion battery needs preheating and charging according to current data of the ternary lithium-ion battery;

[0023] If necessary, the step of analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery is performed.

[0024] Optionally, after analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery, the method further includes:

[0025] Determining whether the ternary lithium-ion battery is healthy according to whether the health status of the ternary lithium-ion battery reaches a preset threshold;

[0026] If so, it is determined that the ternary lithium-ion battery is healthy and the step of determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery is performed.

[0027] Optionally, after determining whether the ternary lithium-ion battery is healthy based on whether the health status of the ternary lithium-ion battery reaches a preset threshold, the method further includes:

[0028] If not, determining that the ternary lithium-ion battery is unhealthy and predicting the remaining life of the ternary lithium-ion battery according to the health status of the ternary lithium-ion battery;

[0029] The health status of the ternary lithium-ion battery and the remaining life of the ternary lithium-ion battery are sent to a host computer for display.

[0030] In addition, to achieve the above-mentioned purpose, the present invention also proposes a ternary lithium-ion battery preheating and charging device, the ternary lithium-ion battery preheating and charging device comprising:

[0031] The acquisition module is used to collect the current data of the ternary lithium-ion battery and the current external ambient temperature;

[0032] an analysis module, configured to analyze current data of the ternary lithium-ion battery to determine a health status of the ternary lithium-ion battery;

[0033] The determination module is used to determine the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current external ambient temperature.

[0034] In addition, to achieve the above-mentioned purpose, the present invention also proposes a ternary lithium-ion battery preheating and charging device, which includes: a memory, a processor, and a ternary lithium-ion battery preheating and charging program stored in the memory and executable on the processor, wherein the ternary lithium-ion battery preheating and charging program is configured to implement the steps of the ternary lithium-ion battery preheating and charging method described above.

[0035] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a ternary lithium-ion battery preheating and charging program is stored. When the ternary lithium-ion battery preheating and charging program is executed by a processor, the steps of the ternary lithium-ion battery preheating and charging method described above are implemented.

[0036] The present invention collects current data of a ternary lithium-ion battery and the current ambient temperature; analyzes the current data to determine the health status of the ternary lithium-ion battery; and determines the optimal preheating method and optimal charging temperature for the ternary lithium-ion battery under the current circumstances based on the health status of the ternary lithium-ion battery and the current ambient temperature. The present invention collects current data of a ternary lithium-ion battery and the current ambient temperature to determine the health status of the battery, and determines the optimal preheating method and optimal charging temperature based on the health status and the current ambient temperature. This solves the problem of existing preheating methods causing waste of resources and affecting the health status of the battery, improves battery preheating efficiency, reduces power consumption, mitigates the adverse effects of high-rate preheating, and increases battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural diagram of a ternary lithium-ion battery preheating and charging device in the hardware operating environment involved in an embodiment of the present invention;

[0038] Figure 2 This is a schematic flow chart of a first embodiment of a method for preheating and charging a ternary lithium-ion battery according to the present invention;

[0039] Figure 3 This is a flow chart of an implementation of a method for preheating and charging a ternary lithium-ion battery according to an embodiment of the present invention;

[0040] Figure 4 This is a decision flow chart in an embodiment of a method for preheating and charging a ternary lithium-ion battery according to the present invention;

[0041] Figure 5 This is a flow chart of a second embodiment of the method for preheating and charging a ternary lithium-ion battery according to the present invention;

[0042] Figure 6 This is a flow chart of a third embodiment of the method for preheating and charging a ternary lithium-ion battery according to the present invention;

[0043] Figure 7 This is a structural block diagram of the first embodiment of the ternary lithium-ion battery preheating and charging device of the present invention.

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] Reference Figure 1 , Figure 1 This is a structural diagram of a ternary lithium-ion battery preheating and charging device in the hardware operating environment involved in an embodiment of the present invention.

[0047] like Figure 1 As shown, the ternary lithium-ion battery preheating and charging device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and optionally the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) or a stable non-volatile memory (NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure shown in does not constitute a limitation on the ternary lithium-ion battery preheating and charging device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0049] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a ternary lithium-ion battery preheating and charging program.

[0050] exist Figure 1In the ternary lithium-ion battery preheating and charging device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the ternary lithium-ion battery preheating and charging device of the present invention can be set in the ternary lithium-ion battery preheating and charging device, and the ternary lithium-ion battery preheating and charging device calls the ternary lithium-ion battery preheating and charging program stored in the memory 1005 through the processor 1001, and executes the ternary lithium-ion battery preheating and charging method provided by the embodiment of the present invention.

[0051] The embodiment of the present invention provides a method for preheating and charging a ternary lithium-ion battery, referring to Figure 2 , Figure 2 1 is a flow chart of the first embodiment of the preheating and charging method for a ternary lithium-ion battery according to the present invention.

[0052] In this embodiment, the ternary lithium-ion battery preheating and charging method includes the following steps:

[0053] Step S10: Collect current data of the ternary lithium-ion battery and the current external ambient temperature.

[0054] It should be noted that the executor of this embodiment is a ternary lithium-ion battery preheating and charging device, and it can also be other devices that can achieve the same or similar functions. This embodiment does not limit this. This embodiment uses a ternary lithium-ion battery preheating and charging device as an example for explanation.

[0055] It is understandable that the current data of the ternary lithium-ion battery includes the current voltage, current temperature, current power level, etc., and this embodiment does not impose any specific restrictions on this.

[0056] In a specific implementation, the current voltage, current temperature, current power level of the battery and the current external ambient temperature are collected and processed. For example, the current temperature can be collected by a high-precision and high-sensitivity temperature collector PT100. This embodiment does not impose any specific restrictions on this.

[0057] Step S20: Analyze the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery.

[0058] It should be noted that a ternary lithium-ion battery refers to a lithium battery whose positive electrode material uses a ternary positive electrode material of lithium nickel cobalt manganese or lithium nickel cobalt aluminum oxide. There are many kinds of positive electrode materials for lithium-ion batteries, mainly lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. This embodiment does not impose specific restrictions on this.

[0059] It can be understood that the algorithm written in MATLAB performs a preliminary analysis on the current data of the collected ternary lithium-ion battery, evaluates the health status of the battery, and transmits the health status of the battery to the host computer.

[0060] Furthermore, before step S20, the method further includes: judging whether the ternary lithium-ion battery needs preheating and charging based on the current data of the ternary lithium-ion battery; if so, performing the step of analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery.

[0061] It should be noted that the current capacity of the ternary lithium-ion battery is determined based on the current data of the ternary lithium-ion battery, and whether preheating charging is required is determined based on whether the ratio of the current capacity of the ternary lithium-ion battery to the rated capacity of the ternary lithium-ion battery is greater than a preset ratio. If it is greater, preheating charging is not required; if it is not greater, preheating charging is required.

[0062] Furthermore, after step S20, the step further includes: judging whether the ternary lithium-ion battery is healthy based on whether the health status of the ternary lithium-ion battery reaches a preset threshold; if so, determining that the ternary lithium-ion battery is healthy and executing the step of determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances based on the health status of the ternary lithium-ion battery.

[0063] It should be noted that whether the ternary lithium-ion battery is healthy is determined based on whether the health status of the ternary lithium-ion battery reaches a preset threshold. If so, the ternary lithium-ion battery is determined to be healthy and can be preheated and charged. The preset threshold can be 30%, 40%, etc. This embodiment does not impose specific restrictions on this. For example, when the health status of the ternary lithium-ion battery is greater than 30%, it indicates that the ternary lithium-ion battery is healthy.

[0064] Furthermore, after determining whether the ternary lithium-ion battery is healthy based on whether the health status of the ternary lithium-ion battery reaches a preset threshold, the method further includes: if not, determining that the ternary lithium-ion battery is unhealthy and predicting the remaining life of the ternary lithium-ion battery based on the health status of the ternary lithium-ion battery; and sending the health status of the ternary lithium-ion battery and the remaining life of the ternary lithium-ion battery to a host computer for display.

[0065] It should be noted that the "host computer" refers to the computer that directly issues control commands, typically a PC / hostcomputer / master computer / upper computer. The screen displays various signal changes (hydraulic pressure, water level, temperature, etc.). The "slave computer" directly controls the equipment and obtains its status. It is typically a PLC / microcontroller / slave computer / lower computer. Commands from the host computer are first transmitted to the slave computers, which then interpret these commands as corresponding timing signals to directly control the corresponding equipment. The slave computers periodically read equipment status data (usually analog), convert it into digital signals, and feed it back to the host computer.

[0066] It can be understood that if the health status of the ternary lithium-ion battery is not reached, it indicates that the battery is unhealthy. The remaining life of the ternary lithium-ion battery is predicted based on the health status of the ternary lithium-ion battery, and the health status of the ternary lithium-ion battery and the remaining life of the ternary lithium-ion battery are sent to the host computer software for display, wherein the host computer software can be labview, and this embodiment does not impose specific restrictions on this.

[0067] It's worth noting that the host computer can communicate with the system and perform real-time operations through a human-computer interaction interface. The host computer software can be LabVIEW, a graphical programming language that intuitively expresses the developer's design and offers strong compatibility. The host computer can be programmed using LabVIEW. After preliminary data analysis and verification using MATLAB, information needs to be extracted and transmitted from the resulting data. For example, if the assessed battery health status is low, the predicted remaining battery life will also be low. In this case, the driver needs to be alerted and human-computer interaction needs to be established through the host computer.

[0068] Step S30: determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current external ambient temperature.

[0069] It should be noted that battery preheating means raising the battery temperature to the optimal operating temperature. Since the battery is in a low temperature environment, the active substances and electrolytes in the battery will be affected, which will make the charging time longer and even difficult to fully charge. Therefore, the battery needs to be preheated. By preheating the battery, the battery temperature can be adjusted to reduce the impact of the environment on the battery temperature.

[0070] It is understandable that the battery preheating methods include external preheating, internal preheating and composite preheating. Different preheating methods have different optimal charging temperatures. The corresponding optimal charging temperature is determined according to the preset method.

[0071] In a specific implementation, the determination of the preheating method includes: when it is determined that the ambient temperature is low, selecting a high-rate preheating method, i.e., external preheating, to increase the preheating efficiency of the battery; when it is determined that the ambient temperature is high, selecting a low-rate preheating method, i.e., internal preheating, to reduce unnecessary power consumption. This can be achieved through the interaction between the upper computer and the lower computer. The upper computer sends a control instruction to the lower computer according to the optimal preheating method and the optimal charging temperature. The lower computer controls the preheating circuit according to the control instruction, executes the optimal preheating method, and controls the battery temperature to maintain the optimal preheating temperature.

[0072] like Figure 3 As shown, Figure 3 This is an implementation flow chart of the preheating and charging method for a ternary lithium-ion battery in this embodiment. The control and data acquisition system uses MATLAB to write an algorithm to analyze and process the collected data. The upper computer software LabVIEW is then used to write relevant programs for the upper computer to enable it to perform relevant functions and transmit relevant instructions to the lower computer. The lower computer then controls the preheating circuit, executes the optimal preheating method, and controls the battery temperature to maintain the optimal preheating temperature.

[0073] like Figure 4 As shown, Figure 4 This is a decision flow chart of the preheating and charging method for a ternary lithium-ion battery in this embodiment. After collecting battery data and obtaining the external ambient temperature, it is determined whether the battery is healthy. If it is healthy, an algorithm is written in MATLAB to test the preheating method, and the preheating method is sent to the host computer software LabVIEW. The host computer software LabVIEW sends a control instruction to the lower computer based on the preheating method. The lower computer controls the preheating circuit and executes the optimal preheating method. If it is unhealthy, the driver needs to be reminded, and human-computer communication is carried out through the host computer.

[0074] This embodiment collects current data of the ternary lithium-ion battery and the current ambient temperature; analyzes the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery; and determines the optimal preheating method and optimal charging temperature for the ternary lithium-ion battery under the current circumstances based on the health status of the ternary lithium-ion battery and the current ambient temperature. The present invention collects current data of the ternary lithium-ion battery and the current ambient temperature to determine the health status of the battery, and determines the optimal preheating method and optimal charging temperature based on the health status and the current ambient temperature. This solves the problem that existing preheating methods waste resources and affect the health status of the battery, improves battery preheating efficiency, reduces power consumption, reduces the adverse effects of high-rate preheating, and increases battery life.

[0075] refer to Figure 5 , Figure 51 is a flow chart of a second embodiment of a method for preheating and charging a ternary lithium-ion battery according to the present invention.

[0076] Based on the first embodiment described above, step S20 in the method for preheating and charging a ternary lithium-ion battery in this embodiment includes:

[0077] Step S201: Obtain the rated capacity of the ternary lithium-ion battery.

[0078] It's important to note that battery capacity is one of the most important indicators for measuring battery performance. It represents the amount of electricity a battery can discharge under certain conditions. Depending on the conditions, battery capacity is divided into actual capacity and rated capacity. The rated capacity is the battery capacity specified by national standards and reflects the amount of electricity a battery can store. The larger the value, the more electricity it can store. The actual capacity reflects the amount of electricity the battery can actually store. The larger the actual capacity, the longer the electric vehicle's range. During use, the actual capacity of the battery gradually decreases.

[0079] Step S202: determining the current capacity of the ternary lithium-ion battery according to the current voltage, current temperature and current power level of the ternary lithium-ion battery.

[0080] It should be noted that the definition of battery state of health (SOH) is mainly reflected in several aspects, such as capacity, charge, internal resistance, cycle number, and peak power. The definition of capacity and charge is highly operational, as capacity is the external manifestation of the battery. The definition of internal resistance and remaining cycle number is not very operational, and the remaining cycle number and total cycle number cannot be accurately predicted. Therefore, battery capacity decay is used as the battery health state.

[0081] It can be understood that the current capacity of the ternary lithium-ion battery is the current actual capacity of the battery, and the current actual capacity of the battery is related to the current voltage, current temperature and current power.

[0082] Step S203: Calculating the health status of the ternary lithium-ion battery according to the rated capacity of the ternary lithium-ion battery and the current capacity of the ternary lithium-ion battery.

[0083] It should be noted that the preset relationship between the health state of the ternary lithium-ion battery and the rated capacity of the ternary lithium-ion battery and the current capacity of the ternary lithium-ion battery is obtained, and the health state of the ternary lithium-ion battery is obtained by calculation according to the preset relationship, wherein the preset relationship between the health state of the ternary lithium-ion battery and the rated capacity of the ternary lithium-ion battery and the current capacity of the ternary lithium-ion battery is:

[0084]

[0085] Among them, SOH is the health state of the ternary lithium-ion battery, Caged is the current capacity of the ternary lithium-ion battery, and Crated is the rated capacity of the ternary lithium-ion battery.

[0086] This embodiment obtains the rated capacity of the ternary lithium-ion battery; determines the current capacity of the ternary lithium-ion battery based on the current voltage, current temperature, and current charge level of the ternary lithium-ion battery; and calculates the health status of the ternary lithium-ion battery based on the rated capacity and current capacity of the ternary lithium-ion battery. By determining the health status of the battery based on the rated capacity and current capacity of the ternary lithium-ion battery, the optimal preheating method is determined, which accelerates battery preheating efficiency and reduces battery damage.

[0087] refer to Figure 6 , Figure 6 1 is a flow chart of a third embodiment of a method for preheating and charging a ternary lithium-ion battery according to the present invention.

[0088] Based on the first embodiment described above, step S30 in the method for preheating and charging a ternary lithium-ion battery in this embodiment includes:

[0089] Step S301: determining an initial preheating method according to the health status of the ternary lithium-ion battery.

[0090] It should be noted that the initial preheating method that meets the current health status is determined according to the health status of the ternary lithium-ion battery. The initial preheating methods include external preheating, internal preheating and composite preheating.

[0091] It is understandable that external preheating requires additional devices to increase the battery temperature. Internal preheating uses alternating current to directly stimulate the chemical substances inside the battery, which can cause the battery itself to generate heat. Composite preheating is a combination of external and internal preheating.

[0092] Step S302: determining an optimal preheating method according to the current external environment temperature and the initial preheating method.

[0093] It should be noted that different current external ambient temperatures correspond to different optimal preset methods, and thus the optimal charging temperature is also different. Preheating the battery in the optimal preheating method can reduce unnecessary power consumption and reduce battery damage.

[0094] It is understandable that the remaining battery power also affects the selection of the optimal preset method. When the remaining battery power is low and charging is urgent, a relatively efficient preheating method should be selected. When the battery is not in urgent need of charging, a relatively energy-saving preheating method should be selected.

[0095] Furthermore, in order to speed up the battery preheating efficiency, the step S302 includes: when the current external ambient temperature is greater than or equal to a first preset temperature, using internal preheating as the optimal preheating method; when the current external ambient temperature is less than or equal to a second preset temperature, using external preheating as the optimal preheating method; when the current external ambient temperature is greater than the second preset temperature and less than the first preset temperature, using composite preheating as the optimal preheating method, wherein the first preset temperature is greater than the second preset temperature.

[0096] It should be noted that, generally, preheating is required when charging when the external ambient temperature is below 0 degrees.

[0097] It can be understood that if the current external ambient temperature is greater than or equal to the first preset temperature, the optimal preheating method is internal preheating; if the current external ambient temperature is less than or equal to the second preset temperature, the optimal preheating method is external preheating; if the current external ambient temperature is greater than the second preset temperature and less than the first preset temperature, the optimal preheating method is composite preheating, wherein the first preset temperature is higher than the second preset temperature, the first preset temperature can be -5°C, -10°C, etc., and the second preset temperature can be -15°C, -20°C, etc. This embodiment does not impose specific restrictions on this.

[0098] Step S303: determining an optimal charging temperature according to the health status of the ternary lithium-ion battery and the optimal preheating method.

[0099] It should be noted that the preheating efficiency is highest when the preheating method is optimal, and the charging speed is fastest when the charging temperature is optimal.

[0100] It is understandable that the health status of the ternary lithium-ion battery is related to the battery temperature. Excessively high temperature will damage the health status of the battery. Therefore, based on the health status of the ternary lithium-ion battery and the optimal preheating method, the charging temperature that is the fastest charging speed without damaging the health status of the battery, that is, the optimal charging temperature, is determined.

[0101] This embodiment determines an initial preheating method based on the health status of the ternary lithium-ion battery; determines an optimal preheating method based on the current ambient temperature and the initial preheating method; and determines an optimal charging temperature based on the health status of the ternary lithium-ion battery and the optimal preheating method. By determining the optimal preheating method and thus the optimal charging temperature based on the battery's health status and the ambient temperature, the efficiency of battery preheating is improved, unnecessary power consumption is reduced, and the adverse effects of high-rate preheating on the battery are minimized, thereby extending battery life.

[0102] Reference Figure 7 , Figure 7 This is a structural block diagram of the first embodiment of the ternary lithium-ion battery preheating and charging device of the present invention.

[0103] like Figure 7 As shown, the ternary lithium-ion battery preheating and charging device proposed in the embodiment of the present invention includes:

[0104] The acquisition module 10 is used to collect the current data of the ternary lithium-ion battery and the current external environment temperature;

[0105] An analysis module 20 is configured to analyze current data of the ternary lithium-ion battery to determine a health status of the ternary lithium-ion battery;

[0106] The determination module 30 is configured to determine the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current ambient temperature.

[0107] This embodiment collects current data of the ternary lithium-ion battery and the current ambient temperature; analyzes the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery; and determines the optimal preheating method and optimal charging temperature for the ternary lithium-ion battery under the current circumstances based on the health status of the ternary lithium-ion battery and the current ambient temperature. The present invention collects current data of the ternary lithium-ion battery and the current ambient temperature to determine the health status of the battery, and determines the optimal preheating method and optimal charging temperature based on the health status and the current ambient temperature. This solves the problem that existing preheating methods waste resources and affect the health status of the battery, improves battery preheating efficiency, reduces power consumption, reduces the adverse effects of high-rate preheating, and increases battery life.

[0108] In one embodiment, the current data of the ternary lithium-ion battery includes the current voltage, current temperature and current charge of the ternary lithium-ion battery. The analysis module 20 is further used to obtain the rated capacity of the ternary lithium-ion battery; determine the current capacity of the ternary lithium-ion battery based on the current voltage, current temperature and current charge of the ternary lithium-ion battery; and calculate the health status of the ternary lithium-ion battery based on the rated capacity of the ternary lithium-ion battery and the current capacity of the ternary lithium-ion battery.

[0109] In one embodiment, the determination module 30 is further used to determine an initial preheating method based on the health status of the ternary lithium-ion battery; determine an optimal preheating method based on the current external ambient temperature and the initial preheating method; and determine an optimal charging temperature based on the health status of the ternary lithium-ion battery and the optimal preheating method.

[0110] In one embodiment, the initial preheating method includes external preheating, internal preheating and composite preheating. The determination module 30 is further used to use internal preheating as the optimal preheating method when the current external ambient temperature is greater than or equal to a first preset temperature; use external preheating as the optimal preheating method when the current external ambient temperature is less than or equal to a second preset temperature; and use composite preheating as the optimal preheating method when the current external ambient temperature is greater than the second preset temperature and less than the first preset temperature, wherein the first preset temperature is greater than the second preset temperature.

[0111] In one embodiment, the analysis module 20 is further used to determine whether the ternary lithium-ion battery needs preheating and charging based on the current data of the ternary lithium-ion battery; if so, the step of analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery is performed.

[0112] In one embodiment, the analysis module 20 is further used to determine whether the ternary lithium-ion battery is healthy based on whether the health status of the ternary lithium-ion battery reaches a preset threshold; if so, the ternary lithium-ion battery is determined to be healthy and the step of determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances based on the health status of the ternary lithium-ion battery is executed.

[0113] In one embodiment, the analysis module 20 is further used to determine that the ternary lithium-ion battery is unhealthy if the condition is not reached, and predict the remaining life of the ternary lithium-ion battery based on the health status of the ternary lithium-ion battery; and send the health status of the ternary lithium-ion battery and the remaining life of the ternary lithium-ion battery to a host computer for display.

[0114] In addition, to achieve the above-mentioned purpose, the present invention also proposes a ternary lithium-ion battery preheating and charging device, which includes: a memory, a processor, and a ternary lithium-ion battery preheating and charging program stored in the memory and executable on the processor, wherein the ternary lithium-ion battery preheating and charging program is configured to implement the steps of the ternary lithium-ion battery preheating and charging method described above.

[0115] Since the present ternary lithium-ion battery preheating and charging device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described one by one here.

[0116] In addition, an embodiment of the present invention further proposes a storage medium on which a ternary lithium-ion battery preheating and charging program is stored. When the ternary lithium-ion battery preheating and charging program is executed by a processor, the steps of the ternary lithium-ion battery preheating and charging method described above are implemented.

[0117] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0118] It should be understood that the above is only an example and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any limitation on this.

[0119] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the embodiment scheme, and no limitation is made here.

[0120] In addition, for technical details not fully described in this embodiment, please refer to the preheating and charging method for a ternary lithium-ion battery provided in any embodiment of the present invention, and will not be repeated here.

[0121] In addition, it should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0122] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0123] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0124] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preheating and charging a ternary lithium-ion battery, characterized in that: The method comprises: Collect the current data of the ternary lithium-ion battery and the current external ambient temperature; Analyzing current data of the ternary lithium-ion battery to determine a health status of the ternary lithium-ion battery; Determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current external ambient temperature; The determining of the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current external ambient temperature includes: Determining an initial preheating method according to the health status of the ternary lithium-ion battery; Determining an optimal preheating method according to the current external ambient temperature and the initial preheating method; Determining an optimal charging temperature based on the health status of the ternary lithium-ion battery and the optimal preheating method; The initial preheating mode includes external preheating, internal preheating and combined preheating. The optimal preheating mode is determined according to the current external ambient temperature and the initial preheating mode, including: When the current external ambient temperature is greater than or equal to a first preset temperature, internal preheating is used as the optimal preheating method; When the current external ambient temperature is less than or equal to a second preset temperature, external preheating is used as the optimal preheating method; When the current external environment temperature is greater than the second preset temperature and less than the first preset temperature, composite preheating is used as the optimal preheating method, wherein the first preset temperature is greater than the second preset temperature.

2. The method according to claim 1, wherein The current data of the ternary lithium-ion battery includes the current voltage, current temperature, and current power of the ternary lithium-ion battery. The analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery includes: Obtaining the rated capacity of the ternary lithium-ion battery; Determining the current capacity of the ternary lithium-ion battery according to the current voltage, current temperature, and current power of the ternary lithium-ion battery; The health state of the ternary lithium-ion battery is calculated according to the rated capacity of the ternary lithium-ion battery and the current capacity of the ternary lithium-ion battery.

3. The method according to claim 1, wherein Before analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery, the method further includes: Determining whether the ternary lithium-ion battery needs preheating and charging according to current data of the ternary lithium-ion battery; If necessary, the step of analyzing the current data of the ternary lithium-ion battery to determine the health status of the ternary lithium-ion battery is performed.

4. The method according to claim 1, wherein After analyzing the current data of the ternary lithium-ion battery and determining the health status of the ternary lithium-ion battery, the method further includes: Determining whether the ternary lithium-ion battery is healthy according to whether the health status of the ternary lithium-ion battery reaches a preset threshold; If so, it is determined that the ternary lithium-ion battery is healthy and the step of determining the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery is performed.

5. The method according to claim 4, wherein After determining whether the health status of the ternary lithium-ion battery reaches a preset threshold value, the method further includes: If not, determining that the ternary lithium-ion battery is unhealthy and predicting the remaining life of the ternary lithium-ion battery according to the health status of the ternary lithium-ion battery; The health status of the ternary lithium-ion battery and the remaining life of the ternary lithium-ion battery are sent to a host computer for display.

6. A ternary lithium-ion battery preheating and charging device, characterized in that: The ternary lithium-ion battery preheating and charging device comprises: The acquisition module is used to collect the current data of the ternary lithium-ion battery and the current external ambient temperature; an analysis module, configured to analyze current data of the ternary lithium-ion battery to determine a health status of the ternary lithium-ion battery; A determination module is used to determine the optimal preheating method and the optimal charging temperature of the ternary lithium-ion battery under the current circumstances according to the health status of the ternary lithium-ion battery and the current external ambient temperature. The determination module is also used to determine the initial preheating method according to the health status of the ternary lithium-ion battery; determine the optimal preheating method according to the current external ambient temperature and the initial preheating method; determine the optimal charging temperature according to the health status of the ternary lithium-ion battery and the optimal preheating method. The initial preheating method includes external preheating, internal preheating and composite preheating. The determination module is also used to use internal preheating as the optimal preheating method when the current external ambient temperature is greater than or equal to a first preset temperature; use external preheating as the optimal preheating method when the current external ambient temperature is less than or equal to a second preset temperature; and use composite preheating as the optimal preheating method when the current external ambient temperature is greater than the second preset temperature and less than the first preset temperature, wherein the first preset temperature is greater than the second preset temperature.

7. A ternary lithium-ion battery preheating and charging device, characterized in that: The ternary lithium-ion battery preheating and charging device includes: a memory, a processor, and a ternary lithium-ion battery preheating and charging program stored in the memory and executable on the processor. The ternary lithium-ion battery preheating and charging program is configured to implement the ternary lithium-ion battery preheating and charging method according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores a ternary lithium-ion battery preheating and charging program, which, when executed by the processor, implements the ternary lithium-ion battery preheating and charging method according to any one of claims 1 to 5.

Images