Intelligent management method for lithium batteries, and terminal device and computer-readable storage medium

Abstract

The present application is applicable to the technical field of electric power. Provided are an intelligent management method for lithium batteries, and a terminal device and a computer-readable storage medium. The intelligent management method comprises: collecting voltages at two ends of each lithium battery from among N lithium batteries; separately determining whether N sampled voltages fall within a corresponding first preset voltage range; performing a capacity test on each lithium battery having a sampled voltage falling within the first preset voltage range; and charging an lithium battery, the actual battery capacity of which is greater than a preset capacity threshold value. The intelligent management method for lithium batteries provided in the present application is applied to an intelligent charge and discharge system, and by means of intelligent voltage measurement, capacity tests and charge decision-making, the use and maintenance processes of lithium batteries, especially of lithium batteries that have been used, are optimized, such that the lithium batteries are accurately managed and the use of same is optimized, thereby realizing the maximum utilization of resources while ensuring the safety and reliability of the batteries.

Description

Intelligent management method of lithium battery, terminal device and computer readable storage medium

[0001] The present application claims priority to the Chinese patent application No. 202411134942.9, filed on August 16, 2024 in the China Patent Office and entitled "Intelligent management method of lithium battery, terminal device and computer readable storage medium", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of electric power, and in particular relates to an intelligent management method of lithium battery, a terminal device and a computer readable storage medium. BACKGROUND

[0003] In today's fast-paced society, the popularity of electronic products and people's dependence on them are increasing, and the importance of batteries as one of the core components supporting these high-tech devices is self-evident. Since the advent of lithium-ion batteries in 1980, this technology has perfectly met the high requirements of electronic products on power supply performance due to its unique advantages - compact size, the lightest body among all metal materials, high energy storage density, and low redox potential, thus promoting the rapid development of lithium battery technology. As the leader in the field of rechargeable batteries, the charging and discharging technology for its supporting equipment has also undergone profound changes and continuous optimization. However, for batteries of different use states and different specifications, how to efficiently and flexibly manage them is still a technical problem that needs to be solved. TECHNICAL PROBLEM

[0004] The present application provides an intelligent management method of lithium battery, a terminal device and a computer readable storage medium, which can solve the technical problem of how to efficiently and flexibly manage batteries of different use states and different specifications. TECHNICAL SOLUTION

[0005] In a first aspect, the present application provides an intelligent management method of lithium battery, which is applied to an intelligent charging and discharging system, and the intelligent management method comprises:

[0006] Collecting voltages across the N lithium batteries to obtain N sampling voltages;

[0007] Respectively determining whether the N sampling voltages are located in corresponding first preset voltage ranges;

[0008] For each lithium battery whose sampling voltage is located in the first preset voltage range, performing capacity test to obtain an actual battery capacity of the each lithium battery;

[0009] determining whether the actual battery capacity of each lithium battery is greater than a corresponding preset capacity threshold value;

[0010] charging the lithium battery whose actual battery capacity is greater than the preset capacity threshold value.

[0011] In a possible implementation, the capacity test on each lithium battery whose sampling voltage is within the first preset voltage range to obtain the actual battery capacity of each lithium battery comprises:

[0012] charging each lithium battery according to the charging instruction issued by the electronic device;

[0013] determining whether the charging current of each lithium battery is less than a corresponding first preset current value;

[0014] discharging the lithium battery whose charging current is less than the corresponding first preset current value according to the discharging instruction issued by the electronic device;

[0015] if the voltage across the lithium battery is less than the first preset voltage value, stopping discharging and recording the discharging current and the discharging duration of the discharging process;

[0016] determining the actual capacity of the corresponding lithium battery according to the discharging current and the discharging duration.

[0017] In a possible implementation, the charging instruction comprises a first charging instruction and a second charging instruction, and the charging of the lithium battery according to the charging instruction comprises:

[0018] charging the lithium battery at a constant current according to the first charging instruction;

[0019] determining whether the voltage across the lithium battery reaches a second preset voltage value;

[0020] if yes, charging the lithium battery at a constant voltage according to the second charging instruction.

[0021] In a possible implementation, the first charging instruction comprises a plurality of first charging sub-instructions, each first charging sub-instruction corresponding to control of a constant current charging process of a lithium battery; and the second charging instruction comprises a plurality of second charging sub-instructions, each second charging sub-instruction corresponding to control of a constant voltage charging process of a lithium battery.

[0022] In a possible implementation, before the capacity test on the lithium battery whose sampling voltage is within the first preset voltage range, the intelligent management method further comprises: determining that the lithium battery has been connected to the intelligent charging and discharging system.

[0023] In a possible implementation, the charging the lithium battery whose actual battery capacity is greater than the preset capacity threshold comprises:

[0024] performing constant current charging on the lithium battery according to a third charging instruction issued by the electronic device;

[0025] determining whether the voltage across the lithium battery reaches a third preset voltage value;

[0026] if yes, performing constant voltage charging according to a fourth charging instruction issued by the electronic device;

[0027] determining whether the charging current of the lithium battery is less than a second preset current value;

[0028] if yes, stopping charging.

[0029] In a possible implementation, the third charging instruction comprises a plurality of third charging sub-instructions, each of which corresponds to a constant current charging process of a lithium battery; and the fourth charging instruction comprises a plurality of fourth charging sub-instructions, each of which corresponds to a constant voltage charging process of a lithium battery.

[0030] In a possible implementation, the intelligent management method further comprises issuing a replacement prompt for a lithium battery whose actual battery capacity is not greater than the preset capacity threshold.

[0031] In a second aspect, an embodiment of the present application provides a terminal device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method described above when executing the computer program.

[0032] In a third aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method described above. Advantageous effects

[0033] The present application provides an intelligent management method of a lithium battery, a terminal device, and a computer readable storage medium, which optimizes the use and maintenance process of the lithium battery through intelligent voltage detection, capacity testing, and charging decision, and particularly for the lithium battery that has been used, realizes precise management and optimized use of the lithium battery, and maximizes the use of resources while ensuring the safety and reliability of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0035] Fig. 1 is a structural schematic diagram of the intelligent charging and discharging circuit provided by the embodiments of the present application;

[0036] Fig. 2 is a structural schematic diagram of the intelligent charging and discharging circuit provided by the embodiments of the present application;

[0037] Fig. 3 is a structural schematic diagram of the charging unit provided by the embodiments of the present application;

[0038] Fig. 4 is a structural schematic diagram of the discharging unit provided by the embodiments of the present application;

[0039] Fig. 5 is a structural schematic diagram of the current sampling unit provided by the embodiments of the present application;

[0040] Fig. 6 is a structural schematic diagram of the current sampling unit provided by the embodiments of the present application;

[0041] Fig. 7 is a structural schematic diagram of the power supply module provided by the embodiments of the present application;

[0042] Fig. 8 is a flow schematic diagram of the intelligent control method provided by the embodiments of the present application;

[0043] Fig. 9 is a flow schematic diagram of the intelligent control method provided by the embodiments of the present application;

[0044] Fig. 10 is a flow schematic diagram of the intelligent control method provided by the embodiments of the present application;

[0045] Fig. 11 is a schematic diagram of the terminal device provided by the embodiments of the present application;

[0046] Reference signs: communication module 100, control module 200, charging and discharging control unit 201, power-on control unit 202, charging and discharging module 300, charging unit 301, discharging unit 302, sampling module 400, voltage sampling unit 401, current sampling unit 402, lithium battery in-place detection module 500, power supply module 600, switch module 700, temperature detection module 800, first control switch K1, inductor L, diode D, operational amplifier OP, second control switch K2, load resistor RL, sampling resistor R1, switching chip U1, signal amplification chip U2. Embodiments of the present application

[0047] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0048] It is to be understood that the terminology "includes", "has", "holds", "contains" or "comprising", "including", "having" and the like, when used in the present specification and in the accompanying claims, are used in the sense of "including but not limited to", "including but not limited to", "including but not limited to" and "including but not limited to" respectively, and should be construed as specifically setting forth the stated features, integers, steps or components but not precluding one or more additional features, integers, steps, components and / or groups thereof.

[0049] It is also to be understood that the terminology "and / or" when used in the present specification and in the accompanying claims, refers to one and / or all possible combinations of one or more of the associated listed items.

[0050] As used in the present specification and in the accompanying claims, the term "if" can be interpreted as meaning "when" or "once" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "once it is determined" or "in response to a determination" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0051] In addition, the terms "first", "second", "third", etc. in the description of the present specification and the accompanying claims are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0052] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "comprising", "including", "having" and the like are meant to be interpreted as "including but not limited to" unless otherwise specifically noted.

[0053] In the high-speed forward of today's society, the popularity of electronic products and people's dependence on them is increasing, and the importance of batteries as one of the core components supporting these high-tech devices is self-evident. Since the advent of lithium-ion batteries in 1980, this technology has been driven by its unique advantages - compact size, the lightest body among all metal materials, high energy storage density, and low redox potential, which perfectly meets the high requirements of electronic products for power performance, thus promoting the rapid development of lithium battery technology. As the leader in the field of rechargeable batteries, the charging and discharging technology of its supporting equipment has also undergone profound changes and continuous optimization. However, for batteries of different use states and different specifications, how to efficiently and flexibly manage them is still a technical problem that needs to be solved.

[0054] Therefore, the present application proposes an intelligent management method for lithium batteries, a terminal device and a computer readable storage medium, which optimizes the use and maintenance process of lithium batteries through intelligent voltage detection, capacity testing and charging decision, especially for used lithium batteries, realizes precise management and optimized utilization of lithium batteries, while ensuring the safety and reliability of the battery, and realizing the maximum utilization of resources.

[0055] In order to better understand the present application, first of all, the intelligent charging and discharging system, the subject of the present application, is introduced.

[0056] First of all, it should be noted that the intelligent charging and discharging system includes an intelligent charging and discharging circuit and an electronic device.

[0057] For example, the electronic device can be a PC (Personal Computer), such as a desktop computer, a notebook computer, a small notebook computer, a tablet computer, and an ultrabook, etc. It should be noted that any device with the functions of sending control instructions, receiving information and certain processing capabilities can be used as the electronic device mentioned in the present application, and the present application does not limit this.

[0058] Referring to the circuit structure diagram of one embodiment of the intelligent charging and discharging circuit shown in FIG. 1, as an example but not limitation, it includes:

[0059] The communication module 100 is coupled to an electronic device for communication with the electronic device;

[0060] The control module 200 is coupled to the communication module 100, and is used to control the charging and discharging process of the lithium battery according to the control instruction received by the communication module 100;

[0061] N charging and discharging modules 300, the N charging and discharging modules 300 are coupled to the control module 200, and each charging and discharging module 300 is configured to charge and discharge the lithium battery connected thereto under the control of the control module 200;

[0062] a sampling module 400, the sampling module 400 is coupled to each charging and discharging module 300 and the control module 200, and the sampling module 400 is configured to sample the voltage and current of the charging and discharging module 300 to obtain voltage sampling data and current sampling data and output to the control module 200.

[0063] The intelligent charging and discharging circuit provided by the embodiment of the present application realizes intelligent charging and discharging management of N lithium batteries through mutual cooperation between the communication module 100, the control module 200, the charging and discharging module 300 and the sampling module 400.

[0064] Specifically, the communication module 100 is responsible for communication with the electronic device, can receive control instructions from the electronic device, and can send circuit state information to the electronic device.

[0065] For example, the electronic device can be a PC (Personal Computer, personal computer), such as a desktop computer, a notebook computer, a small notebook computer, a tablet computer, and an ultrabook, etc. It should be noted that any device with control instruction sending and information receiving functions can be used as the electronic device mentioned in the present application, and the present application does not limit this.

[0066] For example, the circuit state information includes: circuit temperature, voltage and current of the charging and discharging module 300.

[0067] For example, the communication module 100 can be an RS485 interface circuit, and the control module 200 communicates with the electronic device through the RS485 interface circuit.

[0068] The control module 200 receives the control instructions from the communication module 100 and manages the charging and discharging process of the N lithium batteries according to the control instructions.

[0069] For example, the control module 200 can accurately control various parameters of the charging and discharging module 300 according to the control instructions, such as: charging target voltage, maximum charging current, charging cutoff current, discharging target voltage, maximum discharging current, etc. The control module 200 can flexibly control the charging and discharging process according to the control instructions, and can ensure the safety and efficiency of the charging and discharging process, and can also be compatible with different models of lithium batteries.

[0070] The charging and discharging module 300 is responsible for charging or discharging the N lithium batteries under the control of the control module 200.

[0071] The sampling module 400 is responsible for real-time monitoring of the voltage and current of the charging and discharging module 300, and feeding back these data to the control module 200. The control module 200 processes the current sampling data and voltage sampling data to obtain the voltage sampling value and the current sampling value. Through the sampling data, the charging and discharging state can be understood in real time, so as to perform accurate control and avoid overcharging, overdischarging and other problems.

[0072] In some possible embodiments, the control module 200 can analyze the voltage sampling value and the current sampling value, and control the charging and discharging module 300 according to the analysis result. For example, the voltage sampling value can be compared with a preset voltage threshold value, and when the voltage sampling value is greater than the preset voltage threshold value, the control module 200 controls the charging and discharging module 300 to stop the charging and discharging process.

[0073] In another possible embodiment, after obtaining the voltage sampling value and the current sampling value, the control module 200 can send them to the electronic device through the communication module 100, so that the electronic device analyzes the voltage sampling value and the current sampling value, and issues a control instruction to the control module 200 according to the analysis result, and then the control module 200 controls the charging and discharging process of the charging and discharging module 300 according to the control instruction.

[0074] In addition, it should be noted that the control module 200 can adjust the charging and discharging strategy in real time according to the voltage and current data fed back by the sampling module 400, so as to ensure that each lithium battery can be charged and discharged under safe and stable conditions. This intelligent control mechanism helps to prevent overcharging, overdischarging and other problems, thereby enhancing the stability and reliability of the entire system.

[0075] The following will be described in combination with a specific use scenario. Taking the charging and discharging of a POS machine as an example, a lithium battery is one of the important components of a POS machine and is particularly important in the daily use of the POS machine. For a machine returned after sale, the power thereof has usually been consumed by a part or even completely consumed. At this time, the lithium battery of the POS machine needs to be charged first. However, in the case that a large number of returned machines, it needs to consume a large amount of time to charge each battery one by one. The intelligent charging and discharging circuit proposed in the present application can charge multiple lithium batteries at the same time. Compared with charging one by one, the parallel charging mode can significantly reduce the overall charging and discharging time and effectively improve the charging and discharging efficiency. Moreover, the present application manages the charging process of N lithium batteries through a unified intelligent charging and discharging circuit, greatly simplifying the management operation. Only by sending a control instruction through an electronic device, centralized control of all lithium batteries can be realized without operating each lithium battery one by one, improving the management efficiency and reducing errors and delays that may be caused by complicated operations. In addition, as the demand grows, more lithium batteries can be supported by increasing the charging and discharging module 300 without major modification of the existing circuit, having good scalability.

[0076] In a possible implementation, referring to FIG. 2, the control module 200 includes N charging and discharging control units 201, and the charging and discharging control unit 201 corresponds to the charging and discharging module 300 one by one. The charging and discharging control unit 201 is configured to control the charging and discharging process of the charging and discharging module 300 corresponding thereto.

[0077] It should be noted that in the intelligent charging and discharging circuit of the lithium battery, the control module 200 is the core of the whole system and is responsible for managing the charging and discharging process of each lithium battery according to the control instruction. In order to realize this function, the control module 200 is internally provided with N charging and discharging control units 201, and the N charging and discharging control units 201 correspond to the N charging and discharging modules 300 one by one, forming an accurate control system and ensuring that each lithium battery can be independently and accurately managed, that is, the parameter adjustment (such as charging current, discharging current, charging and discharging cutoff voltage, etc.) in the charging and discharging process can be independently performed according to the different states of each lithium battery.

[0078] It should also be noted that the control instruction further includes the address of the charging and discharging control unit 201, so that the control instruction can be accurately transmitted to each charging and discharging control unit 201 and individually control each charging and discharging control unit 201.

[0079] In a possible implementation, referring to FIG. 2, the intelligent charging and discharging circuit further includes:

[0080] The lithium battery in-place detection module 500 is coupled to the control module 200 and each of the charge-discharge modules 300, and is configured to detect whether the lithium battery is connected to the charge-discharge module 300 and feed back the detection result to the control module 200.

[0081] It should be noted that the main function of the lithium battery in-place detection module 500 is to detect whether each lithium battery is correctly connected to the corresponding charge-discharge module 300, so as to prevent short circuit, overcurrent and other safety problems caused by incorrect installation of the battery. In addition to safety detection, the lithium battery in-place detection module 500 can also provide real-time feedback of the battery connection state to the control module 200, and the control module 200 can further adjust the charge-discharge strategy or send a corresponding warning signal according to the actual connection state of the battery.

[0082] For example, during use, if a battery is not correctly installed, the lithium battery in-place detection module 500 can feed back to the control module 200, and the control module 200 can send a warning signal to the electronic device through the communication module 100 to remind the user to find and solve the problem in time.

[0083] It should be further noted that the lithium battery in-place detection module 500 can be implemented by using various technologies, including but not limited to mechanical switches, Hall sensors, contact sensors or optical sensors, etc. These sensors can detect the physical connection state between the battery and the charge-discharge module 300, or detect whether the battery is in place by detecting the unique electrical characteristics (such as resistance, capacitance, etc.) of the battery.

[0084] For example, the presence of the battery can be detected by a mechanical switch triggered when the battery is inserted; or the presence of the battery can be detected by using the change of the magnetic field, i.e. when the battery is close to the sensor, the magnetic field around the sensor will change, thereby triggering a detection signal; or the presence of the battery can be detected by using the reflection or shielding of light, i.e. when the battery is inserted, it will shield or reflect a specific light, thereby triggering a detection signal. The specific method of detecting the presence of the battery is not limited in the present application.

[0085] It should be further noted that the lithium battery in place detection module 500 can detect the battery in place condition of each charging and discharging module 300 and give the detection result one by one; for the case that there are many charging and discharging modules 300, a detection result of the battery in place condition of multiple charging and discharging modules 300 can also be given, for example, for the case that N is 288, a comprehensive detection result of the battery in place condition of the first to 48th charging and discharging modules 300 can be given, that is, if all the 48 batteries are in place, a battery in place signal is given, and if any of the batteries is not in place, a battery not in place signal is given; for the 49th to 96th, 97th to 144th, 145th to 192nd, 193rd to 240th and 241st to 288th charging and discharging modules 300, the detection result can also be given in the above manner. In this way, the number of transmission signals can be reduced, and the burden of system data transmission can be reduced.

[0086] In a possible implementation, referring to FIG. 2, the control module 200 includes a power-on control unit 202, and the intelligent charging and discharging circuit further includes:

[0087] A power supply module 600, the power supply module 600 is coupled to the charging and discharging module 300, and is used to provide power for the charging and discharging module 300;

[0088] A switch module 700, one end of the switch module 700 is coupled to the power supply module 600, and the other end is coupled to an alternating current power supply, and the switch module 700 is used to control the connection between the alternating current power supply and the power supply module 600;

[0089] The power-on control unit 202, the input end of the power-on control unit 202 is coupled to the lithium battery in place detection module 500, and the output end is coupled to the switch module 700, and the power-on control unit 202 is used to control the switch module 700 according to the detection result of the lithium battery in place detection module 500.

[0090] It should be noted that the power supply module 600 can convert the power from other energy sources (such as mains or other power sources) into the voltage and current specifications required by the charging and discharging module 300, and provide the necessary power for the charging and discharging module 300. Moreover, the power supply module 600 also provides power for other modules and units in the intelligent charging and discharging circuit.

[0091] In some possible implementation manners, the power module 600 can provide voltages of +12V, -12V, +5V and +3.3V. Among them, +12V and +5V adopt a DC-DC step-down mode; +3.3V adopts a linear voltage stabilizing mode; -12V is a negative voltage circuit based on the switching characteristics of a triode, and a square wave of about 1KHz needs to be provided to switch the triode when in use. Referring to FIG. 7, when the PWM is at a low level, the triode Q72 is turned on, the triode Q71 is turned off, and the VCC charges the capacitor C71 through the triode Q72. The charging loop is VCC-triode Q72-capacitor C71-diode D72-GND, and the capacitor C71 is left positive and right negative. When the PWM is at a high level, the triode Q72 is turned off, the triode Q71 is turned on, and the capacitor C71 begins to discharge. The discharging loop is capacitor C71-capacitor C72-diode D1, and this process is also a process of charging the capacitor C72. After the capacitor C72 is fully charged, the lower end is positive and the upper end is negative.

[0092] It should be noted that the -12V power supply provided by the embodiment of the present application is designed based on a triode, and such design can save a negative voltage power supply chip and reduce the circuit cost.

[0093] It should be further noted that the power module 600 further includes the resistor R71 and the resistor R72.

[0094] In some possible implementation manners, the switch module 700 can be an AC contactor. The AC contactor is an automatic switching electric appliance for turning on or turning off a load main circuit, is an electric appliance for turning on or turning off a load main circuit by using electromagnetic force, is suitable for frequently operating, remotely controlling a strong current circuit, and has a low-voltage release protection performance.

[0095] It should be further noted that, in the use process, based on the detection result of the lithium battery in-place detection module 500, the power-on control unit 202 can send a corresponding control signal to the switch module 700. For example, if the lithium battery is in place, the power-on control unit 202 can instruct the switch module 700 to turn on and allow the AC power supply to supply power to the power module 600; if the lithium battery is not in place, the power-on control unit 202 can instruct the switch module 700 to turn off to ensure system safety.

[0096] The overall working process of the circuit power-on is described as follows. When the system is powered on, the lithium battery in-place detection module 500 first detects the state of the lithium battery. If the lithium battery is in place, the detection result is sent to the power-on control unit 202. The power-on control unit 202 controls the switch module 700 to be turned on according to the detection result, allowing the alternating current power supply to supply power to the power supply module 600. After the power supply module 600 receives the power, it converts it into a current and voltage specification suitable for the charging and discharging module 300 and provides power for the charging and discharging process of the lithium battery. Finally, the charging and discharging module 300 charges or discharges the lithium battery. If the lithium battery is found to be not in place during detection, the power-on control unit 202 controls the switch module 700 to disconnect the power supply module 600 from the alternating current power supply.

[0097] In a possible implementation, referring to FIG. 2, the circuit state information includes: a circuit temperature, and the intelligent charging and discharging circuit further includes:

[0098] The temperature detection module 800 is coupled to the electronic device and is configured to detect the circuit temperature of the intelligent charging and discharging circuit and output the temperature detection result to the electronic device.

[0099] It should be noted that the temperature detection module 800 is configured to monitor the temperature of the circuit in real time. By using a high-precision temperature sensor, the module can accurately obtain the current temperature value of the circuit. Moreover, the temperature detection module 800 can transmit the detected temperature information to the electronic device, so that the electronic device can further process or respond.

[0100] For example, when the electronic device determines that the temperature value obtained by the sampling module 400 exceeds a preset temperature threshold, the electronic device outputs a power-off instruction to the control module 200, and the control module 200 controls the switch module 700 to disconnect the power supply module 600 from the charging and discharging module 300. It should be noted that the preset temperature threshold is determined according to the design requirements of the circuit, the heat resistance of the materials used, and the safety standards and other factors. Once the circuit temperature reaches or exceeds this threshold, it means that the circuit may be in an overheated state, which may cause damage or cause a fire and other safety risks.

[0101] In some possible implementations, the intelligent charging and discharging circuit further includes a cooling fan. The fan is always on, even after the circuit is powered off due to overheating. The fan continues to work until the temperature drops to a certain preset value and then automatically powers on.

[0102] In a possible implementation, referring to FIG. 2, the charging and discharging module 300 includes:

[0103] The charging unit 301 is coupled to the control module 200 and is configured to charge the lithium battery under the control of the control module 200.

[0104] The discharging unit 302 is coupled to the control module 200, and is configured to discharge the lithium battery under the control of the control module 200.

[0105] It should be noted that the main function of the charging unit 301 is to safely and effectively charge the lithium battery. The charging unit 301 is connected to the control module 200 and receives control signals from the control module 200, including start charging, stop charging, and adjust charging parameters. Through communication with the control module 200, the charging unit 301 can flexibly respond to different charging requirements.

[0106] The main function of the discharging unit 302 is to control the lithium battery to release electrical energy to the outside. Similar to the charging unit 301, the discharging unit 302 is also connected to the control module 200 and receives discharge instructions from the control module 200, including start discharging, stop discharging, and adjust discharging power.

[0107] In one possible implementation, referring to FIG. 3, the charging unit 301 includes:

[0108] The first control switch K1 has an input end coupled to a voltage output end and a control end coupled to the control module 200;

[0109] The inductor L has one end coupled to the output end of the first control switch K1 and the other end coupled to the lithium battery;

[0110] The capacitor has one end coupled to the other end of the inductor L and the other end grounded;

[0111] The diode D has one end coupled to the output end of the first control switch K1 and the other end grounded.

[0112] The principle and working process of the charging unit 301 are introduced as follows. The charging unit 301 provided in the embodiment of the application adopts a BUCK type direct current step-down switching power supply mode, uses a single-chip microcomputer to generate a 47 KHZ PWM pulse signal, controls the first control switch K1 through an IR2104, and thus controls the entire BUCK (step-down conversion) circuit. When the first control switch K1 is turned on, the inductor L converts the current flowing therethrough into magnetic energy for energy storage, and the capacitor C converts part of the current flowing through the inductor L into charge storage; when the first control switch K1 is turned off, the inductor L generates a reverse electromotive force, which is delivered to the load through a voltage output terminal and forms a loop with the freewheeling diode D, and at the same time, the capacitor C converts the charge into a current to supply power to the load. The first control switch K1 is turned on and turned off continuously, so that the VCC generates a pulsating voltage, which is converted into a relatively stable direct current voltage through an LC filter circuit to deliver the voltage to the load. The voltage value of the output voltage is proportional to the time during which the first control switch K1 is turned on in a period. When external factors cause the output voltage or current to change, the 12-bit ADC of the single-chip microcomputer collects the output voltage and current in real time, adjusts the duty cycle of the first control switch K1 in real time, and thus forms a closed-loop voltage control circuit, so as to achieve the purpose of constant current and constant voltage output.

[0113] In a possible implementation, referring to FIG. 4, the discharging unit 302 includes:

[0114] an operational amplifier OP, a non-inverting input terminal of the operational amplifier OP being coupled to the control module 200;

[0115] a second control switch K2, a control terminal of the second control switch K2 being coupled to an output terminal of the operational amplifier OP;

[0116] a load resistor RL, one end of the load resistor RL being coupled to the lithium battery, and the other end being coupled to an input terminal of the second control switch K2;

[0117] a sampling resistor R1, one end of the sampling resistor R1 being coupled to an output terminal of the second control switch K2 and an inverting input terminal of the operational amplifier OP, and the other end being grounded.

[0118] The principle and working process of the discharging unit 302 are described as follows. The discharging unit 302 mainly consists of an operational amplifier OP and a second control switch K2, and is a current-adjustable constant current source circuit. The constant current source circuit designed by using the operational amplifier OP introduces feedback, and the constant current source of the operational amplifier OP has sufficient precision and adjustability compared with the constant current source of a triode. By using the "virtual short" characteristic of the operational amplifier OP, the in-phase voltage Vin+ is equal to the anti-phase voltage Vin-. Meanwhile, the anti-phase input end is connected to the sampling resistor R1 and then grounded. When the voltage VIN is stable, the voltage across the sampling resistor R1 is also VIN and does not change, so the current flowing through the sampling resistor R1 does not change regardless of the changes of the external circuit. The current of the RL load is equal to the current of the sampling resistor R1, so the current of the RL load remains unchanged even if the power supply of the RL load is a variable voltage power supply, achieving the effect of constant current. The size of the output current can be controlled by using the DAC function of the single-chip microcomputer to control the Vin+ input.

[0119] It should be noted that the discharging unit 302 further includes resistors R1, R2, R3 and R5.

[0120] In a possible implementation, the sampling module 400 includes:

[0121] The voltage sampling unit 401 is coupled to the charging and discharging module 300 at one end and coupled to the control module 200 at the other end.

[0122] The current sampling unit 402 is coupled to the charging and discharging module 300 at one end and coupled to the control module 200 at the other end.

[0123] It should be noted that the main function of the sampling module 400 is to monitor the voltage and current in the charging and discharging process in real time or periodically, so as to adjust the charging and discharging strategy according to these parameters and ensure the safe and efficient operation of the system. Specifically, the sampling module 400 includes the voltage sampling unit 401 and the current sampling unit 402.

[0124] The voltage sampling unit 401 is responsible for measuring the voltage of the charging and discharging module 300 and transmitting the collected voltage data to the control module 200 for processing and analysis. The current sampling unit 402 is responsible for measuring the current through the charging and discharging module 300 and transmitting the collected current data to the control module 200.

[0125] In a possible implementation, referring to FIGS. 5 and 6, the current sampling unit 402 includes:

[0126] Switch chip U1, the switch chip U1 includes a plurality of output interfaces, the input of the switch chip U1 is coupled with the charge-discharge module 300, for obtaining the sampling current of the charge-discharge module 300, and different output interfaces are switched according to the size of the sampling current;

[0127] Signal amplification chip U2, the input end of the signal amplification chip U2 is coupled with the output interface of the switch chip U1, and the output end is coupled with the control module 200, and the signal amplification chip U2 is used for amplifying the sampling current output by the switch chip U1, and outputting the amplified sampling current to the control module 200.

[0128] It should be noted that the maximum charge-discharge current of the charge-discharge module 300 reaches 3A, and the current sampling range is large, in order to ensure the sampling accuracy, the current sampling unit 402 provided by the embodiment of the application adopts a hierarchical sampling mode, that is, according to the current size, it is divided into four grades: 0-250mA, 251-500mA, 501-1000mA and 1001-3000mA, and the function of the switch chip U1 is switching, that is, according to the current gear interval, the actual current is switched to different input pins of the signal amplification chip U2, and then the signal amplification chip U2 amplifies the sampled current in proportion and outputs to the control module 200.

[0129] The above is the execution subject of various methods provided by the application.

[0130] The intelligent management method of the lithium battery provided by the application will be described below through specific embodiments.

[0131] The embodiment of the application provides a kind of intelligent management method of lithium battery, refer to figure 8, the intelligent management method is applied to a intelligent charge-discharge system, the intelligent management method includes:

[0132] Step S100: the voltage of the N lithium batteries is collected, and N sampling voltages are obtained;

[0133] Step S200: whether N sampling voltages is located in corresponding first preset voltage range is judged respectively;

[0134] Step S300: for each lithium battery, the sampling voltage is located in the first preset voltage range, capacity test is carried out, and the actual battery capacity of each lithium battery is obtained;

[0135] Step S400: whether the actual battery capacity of each lithium battery is greater than corresponding preset capacity threshold is judged;

[0136] Step S500: for the lithium battery, the actual battery capacity is greater than the preset capacity threshold, and is charged.

[0137] It should be noted that in step S100, the system collects the voltage across each lithium battery to obtain N sampling voltages. In some possible embodiments, the sampling process in step S100 is performed by a sampling module in the intelligent charging and discharging system.

[0138] Next, the system determines whether each sampling voltage is within the corresponding first preset voltage range. The first preset voltage range is usually set according to the safe working voltage range of the battery. This step is a basic battery state monitoring, which is used to preliminarily evaluate the safety of the battery and whether the battery is in a working state, to ensure that the battery is in a safe state before charging or discharging, and to avoid potential dangers such as overcharging, overdischarging or short circuit.

[0139] In some possible embodiments, the determination process in step S200 is performed by an electronic device in the intelligent charging and discharging system. Specifically, after the sampling module samples the voltage across the lithium battery, the sampling voltage is output to the control module, processed by the control module, and sent to the electronic device via the communication module. The electronic device determines the range of the sampling voltage in combination with the first preset voltage range.

[0140] In step S300, for the lithium battery whose sampling voltage is within the first preset voltage range, the system further performs a capacity test. The capacity test is a key step for evaluating the actual storage capacity of the battery.

[0141] In some possible embodiments, the charging and discharging steps in the capacity test in step S300 are performed by a charging and discharging module in the intelligent charging and discharging system, and the capacity calculation process is performed by the electronic device. It should be noted that the charging and discharging module performs charging and discharging operations on the lithium battery under the control of the control instruction issued by the electronic device.

[0142] After obtaining the actual battery capacity of each lithium battery, the system compares the actual battery capacity with a preset capacity threshold. The capacity threshold is a value set based on the performance, usage demand or safety standard of the battery, and is used to determine whether the battery still has sufficient capacity to meet the usage requirements. For example, the capacity threshold can be set to 80% of the nominal capacity of the battery.

[0143] Finally, in step S500, the system charges the lithium battery whose actual battery capacity is greater than the preset capacity threshold. This step is based on the comprehensive judgment result of all the previous steps, and aims to ensure that only the batteries that are both safe and have sufficient capacity are charged, thereby avoiding unnecessary charging operations on damaged or low-performance batteries, and maximizing the effective use of resources.

[0144] In some possible embodiments, the charging process in step S500 is performed by the charging and discharging module under the control of the control instruction issued by the electronic device.

[0145] The lithium battery intelligent management method provided in the embodiments of the present application can avoid charging or discharging the battery with abnormal voltage, reduce the risk of safety accidents such as battery short circuit and fire, and improve safety. Moreover, the battery with sufficient capacity can be identified through capacity testing, so that the battery that can still be used is not discarded too early, and the maximum utilization of resources is achieved. Furthermore, the battery intelligent management method provided in the present application can charge only the battery that meets the specific voltage and capacity conditions, so that unnecessary charging and discharging cycles of the battery can be reduced, and resources can be saved.

[0146] In addition, it should be further pointed out that the lithium battery intelligent management method provided in the present application realizes intelligent management of lithium batteries, that is, the entire process is automatically completed based on an intelligent charging and discharging system, manual intervention is reduced, management efficiency and accuracy are improved, and multiple lithium batteries can be managed at the same time, and the charging and discharging process of each lithium battery can be flexibly controlled.

[0147] In summary, the lithium battery intelligent management method provided in the embodiments of the present application optimizes the use and maintenance process of lithium batteries through intelligent voltage detection, capacity testing and charging decision, while ensuring the safety and reliability of the battery, precise management of the lithium battery and maximum utilization of resources are achieved. In particular, in the process of battery recycling and secondary use, the present application can identify which batteries still have sufficient capacity and can be used, rather than being directly discarded, which helps to reduce resource waste and promote the development of circular economy.

[0148] In a possible implementation manner, referring to FIG. 9, step S300 includes:

[0149] Step S301: charging each lithium battery according to the charging instruction issued by the electronic device;

[0150] Step S302: if the charging current of the lithium battery is less than the first preset current value, discharging according to the discharging instruction issued by the electronic device;

[0151] Step S303: if the voltage across the lithium battery is less than the first preset voltage value, stopping discharging and recording the discharging current and discharging duration of the discharging process;

[0152] Step S304: determining the actual capacity of the corresponding lithium battery according to the discharging current and the discharging time.

[0153] It should be noted that the present embodiment introduces the battery capacity testing process, which utilizes the intelligent charging and discharging system to perform charging, discharging, recording of relevant data and other steps, and calculates the actual capacity of the battery. In order to better understand the present application, the principle of the battery capacity testing provided in the present application is first described.

[0154] The capacity of a lithium battery refers to the amount of electricity it can hold, usually measured in "ampere-hours" or "milliampere-hours". For example: a lithium battery with a capacity of 500mAh means that if the working current of the battery is 10mA, it can work continuously for 50 hours. In addition, the lithium battery capacity test is based on the full charge voltage and the set termination voltage, because the minimum discharge voltage of the lithium battery is 2.75V, so the voltage less than 3V is meaningless for the lithium battery capacity test, so the termination voltage is generally set to 3V.

[0155] The process of battery capacity test includes two stages of battery charging and battery discharging. The battery needs to be fully charged first, and then fully discharged, and the discharge current and discharge time are recorded. Finally, the battery capacity is obtained by multiplying the discharge duration of constant current discharge by the discharge current.

[0156] For example, a battery with a nominal capacity of 2600mah has a full charge voltage of 4.2V, and the termination voltage is set to 3V. First, charge the battery until the voltage across the battery reaches 4.2V. Then use a discharge current of 1300mA to discharge it at a constant current, and record the discharge duration as 1.8 hours. The actual capacity of the battery is 1300mA*1.8h=2340mAh.

[0157] After understanding the above capacity test principle, the following introduces an implementation of step S300 in the embodiment of the application, including steps S301-S304.

[0158] Specifically, in step S301, first, according to the charging instruction issued by the electronic device, charge each lithium battery located in the first preset voltage range.

[0159] It should be noted that the charging instruction can accurately control various parameters of the charging process, such as: charging target voltage, charging maximum current, charging cutoff current. For example, the charging instruction contains the following contents: start bit, address, command, voltage, capacity, target voltage, internal resistance and end bit, for example: FFFF 01 01 420 3000 410 300FFFE.

[0160] In some possible embodiments, the above charging process can be performed by the charge and discharge module.

[0161] During the charging process, the system will continuously monitor the charging current of each lithium battery. If the charging current is less than the corresponding first preset current value, it indicates that the battery has approached or reached its charging limit, at which point the charging process should be stopped.

[0162] In some possible embodiments, the above current monitoring process can be performed by the sampling module.

[0163] It should be noted that the first preset current value is set based on factors such as battery characteristics and charging efficiency, and different first preset current values can be set for different lithium batteries to flexibly cope with lithium batteries of different specifications.

[0164] Further, for lithium batteries with a charging current less than the corresponding first preset current value, the system will perform constant-current discharge according to the discharge instruction issued by the electronic device. Constant-current discharge can ensure that the current remains relatively stable during discharging, which is beneficial to accurately control the discharging process and avoid adverse effects on battery performance due to current fluctuations.

[0165] It should be noted that the discharge instruction can accurately control various parameters of the discharging process of each lithium battery, such as the discharge target voltage and the maximum discharge current.

[0166] During discharging, the intelligent charging and discharging circuit will continuously monitor the voltage across the lithium battery. If the voltage across the lithium battery drops to a value less than the corresponding first preset voltage value, the system will immediately stop discharging. This is because the voltage of a lithium battery is closely related to its remaining capacity. As discharging proceeds, the battery voltage will gradually decrease. When the battery voltage decreases to a preset voltage value, it means that the battery has approached or reached its lower limit of discharge, and continuing to discharge may cause damage to the battery or affect subsequent use.

[0167] It should be noted that the first preset voltage value can also be flexibly set for different lithium batteries to accommodate more specifications of lithium batteries.

[0168] In addition, the system will record the discharge current and the duration of discharging, which are key data for calculating the actual capacity of the battery. According to the recorded discharge current and discharge time, the system can calculate the total amount of electricity released by the battery during discharging (i.e., the actual capacity of the lithium battery).

[0169] In some preferred embodiments, the calculated actual capacity of the lithium battery can also be corrected according to factors such as the internal resistance of the battery and the temperature effect.

[0170] It should be further noted that the intelligent management method of the lithium battery provided in the embodiments of the present application relies on the aforementioned intelligent charging and discharging system, and the intelligent management method will be described in combination with the components of the aforementioned intelligent charging and discharging system. First, the charging instruction is transmitted by the electronic device to the control module 200 through the communication module 100; then, the charging and discharging module 300 charges each lithium battery under the control of the control module 200; it should be noted that the charging instruction can control each charging and discharging module, that is, flexible parameter control of each charging and discharging module can be realized; in the charging process, the sampling module 400 continuously collects the charging current of each lithium battery and outputs to the control module 200, which is processed by the control module 200 and then transmitted to the electronic device; when the electronic device determines that the charging current of a certain lithium battery is less than the corresponding first preset current value, a new control instruction is issued to it, so that the charging and discharging module discharges the lithium battery at a constant current; in the constant current discharging process, the sampling module 400 collects the voltage across the lithium battery, and if the voltage across the lithium battery is less than the first preset voltage value, the discharging is stopped, and the discharging current and discharging duration of the discharging process are recorded, and the actual capacity of the battery is determined accordingly.

[0171] In addition, it should be further noted that since the intelligent charging and discharging circuit provided in the present application can simultaneously charge and discharge up to N batteries, and the actual capacity of the N batteries is calculated by recording the discharging current and discharging duration of the N batteries, the battery capacity test method provided in the present application can conveniently and efficiently obtain the actual capacity of multiple batteries.

[0172] In a possible implementation, the charging instruction includes a first charging instruction and a second charging instruction, and the charging of the lithium battery according to the charging instruction includes:

[0173] Step A100: constant current charging the lithium battery according to the first charging instruction;

[0174] Step A200: determining whether the voltage across the lithium battery reaches a second preset voltage value;

[0175] Step A300: if yes, constant voltage charging according to the second charging instruction.

[0176] In step A100, the intelligent charging and discharging circuit charges the lithium battery at a constant current according to the first charging instruction. The constant current charging stage is to quickly increase the battery capacity when the battery capacity is low, because the relationship between the battery voltage and the charging current is relatively linear at this stage, and the battery can quickly absorb electric energy.

[0177] During the constant current charging process, the voltage across the lithium battery is continuously obtained. When the sampled voltage value reaches the second preset voltage value, it indicates that the battery has approached its full charge state, at which time the charging strategy needs to be adjusted to avoid overcharging, as overcharging can damage the battery.

[0178] Next, in step A300, the constant current charging mode is switched to the constant voltage charging mode according to the new control instruction, the second charging instruction. During the constant voltage charging phase, the voltage across the lithium battery is maintained at a constant voltage value, while allowing the charging current to gradually decrease. The reason for this is that as the battery's charge increases, the internal resistance of the battery increases, and in order to maintain a constant voltage, the charging current will naturally decrease. Constant voltage charging helps to ensure that the battery can be safely and stably charged when it is close to full charge.

[0179] The intelligent control method for lithium batteries provided by the embodiments of the present application combines the constant current charging and constant voltage charging stages, and dynamically adjusts the charging strategy according to the changes in the voltage and charging current of the lithium battery, ensuring the efficiency and safety of the lithium battery charging process. Moreover, the intelligent control method provided by the embodiments of the present application can set different charging parameters for each battery and individually control the charging process of each battery, providing high flexibility.

[0180] In one possible implementation, the first charging instruction includes a plurality of first charging sub-instructions, each of which corresponds to controlling the constant current charging process of a lithium battery; and the second charging instruction includes a plurality of second charging sub-instructions, each of which corresponds to controlling the constant voltage charging process of a lithium battery.

[0181] It should be noted that in the embodiments of the present application, the charging process of each lithium battery is controlled by independent charging sub-instructions. For example, for No. 1 lithium battery, the first charging instruction contains a corresponding first charging sub-instruction, which is specifically used to control the constant current charging process of No. 1 lithium battery, and the second charging instruction also contains a corresponding second charging sub-instruction for No. 1 lithium battery, which is specifically used to control the constant voltage charging process of No. 1 lithium battery. Such a setup has many benefits.

[0182] Firstly, parallelization of the charging process is achieved. By assigning independent charging sub-instructions to each lithium battery, multiple lithium batteries can be controlled to charge simultaneously, achieving parallelization of the charging process. This greatly improves the charging efficiency, especially in scenarios where a large number of lithium batteries need to be quickly charged.

[0183] Moreover, the flexibility of the charging process is improved. Independent charging sub-instructions can customize charging strategies for each lithium battery, such as different charging currents, voltage limits, or charging times. This flexibility allows the system to adapt to different types of lithium batteries or meet different charging needs, improving the system's applicability.

[0184] In addition, the safety of the charging process is improved. The charging process of each lithium battery is independently monitored and controlled, which helps to discover and handle potential charging problems such as overcharging or battery overheating in a timely manner, and further adjusts the charging parameters, thereby protecting the lithium battery from damage and improving the overall system safety.

[0185] Moreover, the intelligent charging circuit has high scalability. As the number of lithium batteries increases, only the number of charging sub-commands needs to be increased accordingly, without major modifications to the overall architecture. This enables the system to easily adapt to future changes in demand, such as expanding the charging station scale.

[0186] Finally, the control of the charging process is also more accurate. Independent charging sub-commands enable the system to more accurately control the charging process of each lithium battery. By monitoring and adjusting charging parameters in real time, the system can ensure that each lithium battery is charged according to the optimal charging curve, thereby prolonging the service life of the lithium battery and improving the charging efficiency.

[0187] In one possible implementation, before the lithium battery with the sampling voltage within the first preset voltage range is subjected to the capacity test, the intelligent management method further comprises:

[0188] Step B100: Determine that the lithium battery has been connected to the intelligent charging and discharging system.

[0189] It should be noted that before the capacity test, a confirmation step is first required, i.e., after confirming that the lithium battery has been safely and correctly connected to the intelligent charging and discharging circuit, the subsequent process will be continued to ensure the safety of the capacity test process.

[0190] In addition, it should be noted that step B100 can be performed by the above-mentioned lithium battery in-place detection module 500 to determine that the lithium battery to be charged has been connected to the charging and discharging module 300 of the intelligent charging and discharging circuit.

[0191] In one possible implementation, referring to FIG. 10, step S500 comprises:

[0192] Step S501: According to a third charging instruction issued by an electronic device, constant current charging is performed on the lithium battery;

[0193] Step S502: Determine whether the voltage across the lithium battery reaches a third preset voltage value;

[0194] Step S503: If yes, constant voltage charging is performed according to a fourth charging instruction issued by the electronic device;

[0195] Step S504: judging whether the charging current of the lithium battery is less than a second preset current value;

[0196] Step S505: if yes, stopping charging.

[0197] It should be noted that for the battery meeting the capacity test condition, it can be considered that it can continue to be used, but after the capacity test is completed, its power has been emptied, and in order to continue to be used, the lithium battery subjected to the capacity test needs to be charged again. The charging process adopts the charging mode of constant current first and constant voltage later.

[0198] Specifically, in step S501, the intelligent charging and discharging circuit charges the lithium battery according to the third charging instruction in a constant current mode. The constant current charging stage is to quickly increase the power of the battery when the power of the battery is low. During the constant current charging process, the voltage across the lithium battery is continuously obtained. When the sampled voltage value reaches a third preset voltage value, it indicates that the battery has approached its full power state. At this time, the charging strategy needs to be adjusted to avoid overcharging, so the charging mode is switched from constant current charging to constant voltage charging mode.

[0199] In the constant voltage charging stage, it is necessary to continuously monitor the size of the charging current. When the charging current decreases to the second preset current value, it indicates that the battery has approached or reached its maximum charging capacity. At this time, it is not meaningful to continue charging, but it may increase the heat and stress of the battery and shorten the service life of the battery. Therefore, if the charging current is less than the second preset current value, it is judged that the battery has been fully charged, and the charging process is ended.

[0200] It should be noted that the above charging process can be executed by the charging and discharging module 300, and the detection process of the above current and voltage can be executed by the sampling module 400.

[0201] Therefore, in the above embodiment, through the combination of the two stages of constant current charging and constant voltage charging, and the dynamic adjustment of the charging strategy according to the changes of the voltage of the lithium battery and the charging current, the efficiency and safety of the charging process of the lithium battery are guaranteed.

[0202] The step S500 is described below in combination with the composition of the intelligent charging and discharging system. In step S501, the third charging instruction is transmitted by the electronic device to the control module 200 through the communication module 100, and the charging and discharging module 300 performs constant-current charging on the lithium battery under the control of the control module 200; in the process of constant-current charging, the sampling module 400 continuously collects the voltage across the lithium battery and outputs to the control module 200, which is processed by the control module 200 and then transmitted to the electronic device; when the electronic device determines that the voltage across the lithium battery reaches the third preset voltage value, a new fourth charging instruction is issued to make the charging and discharging module 300 perform constant-voltage charging on the lithium battery; in the process of constant-voltage charging, the sampling module 400 continuously collects the current flowing through the lithium battery and outputs to the control module 200, which is processed by the control module 200 and then transmitted to the electronic device; when the electronic device determines that the charging current of the lithium battery is less than the second preset current value, an instruction to end charging is issued, and the control module 200 immediately controls the charging and discharging module 300 to stop charging.

[0203] In a possible implementation, the third charging instruction includes a plurality of third charging sub-instructions, each of which corresponds to control of a constant-current charging process of a lithium battery; and the fourth charging instruction includes a plurality of fourth charging sub-instructions, each of which corresponds to control of a constant-voltage charging process of a lithium battery.

[0204] It should be noted that in the process of recharging the lithium battery that has undergone the capacity test, the charging process of each lithium battery is still flexibly performed under the corresponding control instruction, for example: for the No. 1 lithium battery, it has completed the battery capacity test process, and it is determined that its battery capacity is suitable for continued use, so it needs to be charged, and the charging process includes a constant-current charging process and a constant-voltage charging process, the constant-current charging process is performed under the corresponding third charging sub-instruction, and the constant-voltage charging process is performed under the corresponding fourth charging sub-instruction. The benefits of such a setting are the same as those of the first charging sub-instruction and the second charging sub-instruction, including: realizing parallel processing of the charging and discharging process, improving the flexibility, safety and accuracy of the discharging process, and having high scalability. For specific content, refer to the foregoing, which will not be repeated here.

[0205] In a possible implementation, the intelligent management method further includes issuing a replacement prompt for a lithium battery whose actual battery capacity is not greater than a preset capacity threshold.

[0206] It should be noted that for the lithium battery with the battery capacity greater than the preset capacity threshold, the lithium battery can be reused, but for the lithium battery with the battery capacity not greater than the preset capacity threshold, if the lithium battery is continuously used, there are many problems. The most direct impact is that the endurance time of the device using the lithium battery is shortened, and the user needs to frequently charge the device; and the reduction of the battery capacity can cause the device to run slowly and cannot run at the best performance; it can also cause the device to unexpectedly shut down or restart, which not only affects the user experience, but also can cause data loss or damage. Therefore, for the battery with the battery capacity not meeting the preset capacity threshold, a replacement prompt should be given, and it is not recommended to continue using.

[0207] FIG. 11 is a structural schematic diagram of a terminal device provided by an embodiment of the present application. The terminal device 1000 includes at least one processor 1001 (only one processor is shown in FIG. 11), a memory 1002, and a computer program 1003 stored in the memory 1002 and executable on the at least one processor 1001, and the processor 1001 implements the steps in the above-mentioned 11 method embodiments when executing the computer program 1003.

[0208] The terminal device 1000 can be a desktop computer, a notebook computer, a palm computer, a cloud server, and the like. The terminal device can include, but is not limited to, the processor 1001 and the memory 1002. Those skilled in the art can understand that FIG. 11 is only an example of the terminal device 1000, and does not constitute a limitation on the terminal device 1000, and can include more or fewer components than the diagram, or combine certain components, or different components, for example, can also include an input / output device, a network access device, and the like.

[0209] The processor 1001 can be a central processing unit (CPU), and the processor 1001 can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, or the like. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0210] The memory 1002 may, in some embodiments, be an internal storage unit of the terminal device 1000, such as a hard disk or a memory of the terminal device 1000. The memory 1002 may, in other embodiments, also be an external storage device of the terminal device 1000, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like equipped on the terminal device 1000. Further, the memory 1002 may, for example, include both an internal storage unit and an external storage device of the terminal device 1000. The memory 1002 is used to store an operating system, application programs, a boot loader, data, and other programs, and the like, such as program codes of the computer program 1004 and the like. The memory 1002 may also be used to temporarily store data that has been output or is to be output.

[0211] It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, only the division of the above functional units and modules is taken as an example for illustration, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically independently, or two or more units can be integrated in one unit, and the integrated unit can be realized in the form of hardware or in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction, and are not used to limit the protection scope of the present application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0212] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps in each of the method embodiments.

[0213] The embodiments of the present application provide a computer program product. When the computer program product is run on a mobile terminal, the mobile terminal is caused to implement the steps in each of the method embodiments.

[0214] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the present application can implement all or part of the processes in the above-mentioned embodiment methods through a computer program to instruct relevant hardware to complete, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the photographing device / terminal equipment, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, the computer readable medium can not be an electrical carrier signal and a telecommunication signal.

[0215] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0216] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized by electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0217] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / network device and method can be implemented in other ways. For example, the above-described apparatus / network device embodiments are merely schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0218] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiment scheme according to actual needs.

[0219] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for intelligent management of a lithium battery, characterized in that, The intelligent management method is applied to an intelligent charging and discharging system, the intelligent charging and discharging system comprises an intelligent charging and discharging circuit and an electronic device, the intelligent charging and discharging system is used for managing charging and discharging processes of N lithium batteries, N is a positive integer greater than or equal to 1, and the intelligent management method comprises the following steps: Collecting voltages across the N lithium batteries to obtain N sampling voltages; Respectively judging whether the N sampling voltages are located in corresponding first preset voltage ranges; For each lithium battery whose sampling voltage is located in the first preset voltage range, performing capacity testing to obtain an actual battery capacity of the lithium battery; Judging whether the actual battery capacity of the lithium battery is greater than a corresponding preset capacity threshold; Charging the lithium battery whose actual battery capacity is greater than the preset capacity threshold.

2. The intelligent management method of claim 1, wherein, The capacity testing of each lithium battery whose sampling voltage is located in the first preset voltage range comprises the following steps: Charging the lithium battery according to a charging instruction issued by the electronic device; Judging whether a charging current of the lithium battery is less than a corresponding first preset current value; For the lithium battery whose charging current is less than the corresponding first preset current value, discharging the lithium battery according to a discharging instruction issued by the electronic device; If the voltage across the lithium battery is less than a first preset voltage value, stopping discharging and recording a discharging current and a discharging duration of the discharging process; According to the discharging current and the discharging duration, determining an actual capacity of the corresponding lithium battery.

3. The intelligent management method of claim 2, wherein, The charging instruction comprises a first charging instruction and a second charging instruction, and the charging of the lithium battery according to the charging instruction comprises the following steps: According to the first charging instruction, performing constant-current charging on the lithium battery; Judging whether the voltage across the lithium battery reaches a second preset voltage value; If yes, performing constant-voltage charging on the lithium battery according to the second charging instruction.

4. The intelligent management method of claim 3, wherein, The first charging instruction comprises a plurality of first charging sub-instructions, each first charging sub-instruction corresponding to control of a constant-current charging process of one lithium battery; and the second charging instruction comprises a plurality of second charging sub-instructions, each second charging sub-instruction corresponding to control of a constant-voltage charging process of one lithium battery.

5. The intelligent management method of claim 2, wherein, Before the capacity testing of the lithium battery whose sampling voltage is located in the first preset voltage range, the intelligent management method further comprises the following step:

6. The intelligent management method of claim 1, wherein, Determining that the lithium battery has been connected to the intelligent charging and discharging system. The charging of the lithium battery whose actual battery capacity is greater than the preset capacity threshold comprises the following steps: According to a third charging instruction issued by an electronic device, performing constant-current charging on the lithium battery; Judging whether the voltage across the lithium battery reaches a third preset voltage value; If yes, performing constant-voltage charging on the lithium battery according to a fourth charging instruction issued by the electronic device; Judging whether a charging current of the lithium battery is less than a second preset current value; 7. The intelligent management method of claim 6, wherein, If yes, stopping charging. The third charging instruction comprises a plurality of third charging sub-instructions, each third charging sub-instruction corresponding to control of a constant-current charging process of one lithium battery; and the fourth charging instruction comprises a plurality of fourth charging sub-instructions, each third charging sub-instruction corresponding to control of a constant-voltage charging process of one lithium battery.

8. The intelligent management method of claim 1, wherein, The intelligent management method further comprises: issuing a replacement prompt for the lithium battery when the actual battery capacity is not greater than a preset capacity threshold.

9. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor implements the intelligent management method of any one of claims 1 to 8 when executing the computer program.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 8.

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