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

Abstract

The invention is suitable for the technical field of electric power, and provides an intelligent management method of a lithium battery, terminal equipment and a computer readable storage medium, and the intelligent management method comprises the steps: collecting voltages at the two ends of N lithium batteries; whether the N sampling voltages are located in the corresponding first preset voltage ranges or not is judged; carrying out capacity testing on each lithium battery of which the sampling voltage is within a first preset voltage range; and charging the lithium battery of which the actual battery capacity is greater than a preset capacity threshold. The lithium battery intelligent management method provided by the invention is used for the intelligent charging and discharging system, the use and maintenance process of the lithium battery is optimized through intelligent voltage detection, capacity test and charging decision, especially for the used lithium battery, accurate management and optimal utilization of the lithium battery are realized, and the lithium battery management efficiency is improved. And the maximum utilization of resources is realized while the safety and the reliability of the battery are ensured.

Description

Technical Field

[0001] The present application belongs to the field of electric power technology, and in particular, relates to an intelligent management method for lithium batteries, a terminal device, and a computer-readable storage medium. Background Art

[0002] In today's society, the popularity of electronic products and people's dependence on them are increasing day by day. As one of the core components supporting these high-tech devices, the importance of batteries is self-evident. Since the advent of lithium-ion batteries in 1980, this technology has perfectly met the high requirements of electronic products for power performance with 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 a leader in the field of rechargeable batteries, the charging and discharging technology of lithium batteries as their supporting equipment has also undergone profound changes and continuous optimization. However, how to efficiently and flexibly manage batteries of different usage states and specifications is still a technical problem that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present application provide a smart management method for lithium batteries, a terminal device, and a computer-readable storage medium, which can solve the following technical problem, namely, how to efficiently and flexibly manage batteries of different usage states and specifications.

[0004] In a first aspect, an embodiment of the present application provides an intelligent management method for a lithium battery, the intelligent management method being applied to an intelligent charging and discharging system, the intelligent management method comprising:

[0005] Collecting voltages at both ends of the N lithium batteries to obtain N sampled voltages;

[0006] Determine whether the N sampled voltages are within the corresponding first preset voltage range respectively;

[0007] Performing a capacity test on each lithium battery whose sampling voltage is within the first preset voltage range to obtain an actual battery capacity of each lithium battery;

[0008] Determine whether the actual battery capacity of each lithium battery is greater than the corresponding preset capacity threshold;

[0009] Charge the lithium battery whose actual battery capacity is greater than the preset capacity threshold.

[0010] In a possible implementation, performing a capacity test on each lithium battery whose sampled voltage is within the first preset voltage range to obtain an actual battery capacity of each lithium battery includes:

[0011] Charging each of the lithium batteries according to a charging instruction issued by the electronic device;

[0012] Determining whether the charging current of each lithium battery is less than the corresponding first preset current value;

[0013] For a lithium battery whose charging current is less than the corresponding first preset current value, discharging the battery according to the discharge instruction issued by the electronic device;

[0014] If the voltage across the lithium battery is less than a first preset voltage value, discharging is stopped, and the discharge current and discharge duration of the discharge process are recorded;

[0015] The actual capacity of the corresponding lithium battery is determined according to the discharge current and the discharge time.

[0016] In a possible implementation, the charging instruction includes a first charging instruction and a second charging instruction, and charging the lithium battery according to the charging instruction includes:

[0017] Performing constant current charging on the lithium battery according to the first charging instruction;

[0018] Determining whether the voltage across the lithium battery reaches a second preset voltage value;

[0019] If so, constant voltage charging is performed according to the second charging instruction.

[0020] In a possible implementation, the first charging instruction includes multiple first charging sub-instructions, each first charging sub-instruction corresponds to controlling a constant current charging process of a lithium battery; the second charging instruction includes multiple second charging sub-instructions, each second charging sub-instruction corresponds to controlling a constant voltage charging process of a lithium battery.

[0021] In a possible implementation, before performing a capacity test on the lithium battery whose sampling voltage is within the first preset voltage range, the intelligent management method further includes: determining that the lithium battery has been connected to the intelligent charging and discharging system.

[0022] In a possible implementation, charging a lithium battery whose actual battery capacity is greater than a preset capacity threshold includes:

[0023] Performing constant current charging on the lithium battery according to a third charging instruction issued by an electronic device;

[0024] Determining whether the voltage across the lithium battery reaches a third preset voltage value;

[0025] If yes, perform constant voltage charging according to a fourth charging instruction issued by the electronic device;

[0026] Determining whether the charging current of the lithium battery is less than a second preset current value;

[0027] If yes, stop charging.

[0028] In one possible implementation, the third charging instruction includes multiple third charging sub-instructions, and each third charging sub-instruction corresponds to controlling a constant current charging process of a lithium battery; the fourth charging instruction includes multiple fourth charging sub-instructions, and each third charging sub-instruction corresponds to controlling a constant voltage charging process of a lithium battery.

[0029] In a possible implementation, the intelligent management method further includes: issuing a replacement reminder for lithium batteries whose actual battery capacity is not greater than a preset capacity threshold.

[0030] In a second aspect, an embodiment of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described above when executing the computer program.

[0031] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0032] Beneficial effects of this application

[0033] The present application provides a lithium battery intelligent management method, terminal equipment and computer-readable storage medium, which optimizes the use and maintenance process of lithium batteries through intelligent voltage detection, capacity testing and charging decisions, especially for used lithium batteries, to achieve accurate management and optimized utilization of lithium batteries, while ensuring battery safety and reliability, and maximizing resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is one of the structural schematic diagrams of the intelligent charging and discharging circuit provided in the embodiment of the present application;

[0036] Figure 2 This is the second structural diagram of the intelligent charging and discharging circuit provided in the embodiment of the present application;

[0037] Figure 3is a schematic diagram of the structure of a charging unit provided in an embodiment of the present application;

[0038] Figure 4 is a schematic diagram of the structure of a discharge unit provided in an embodiment of the present application;

[0039] Figure 5 This is one of the structural schematic diagrams of the current sampling unit provided in the embodiment of the present application;

[0040] Figure 6 This is the second structural diagram of the current sampling unit provided in the embodiment of the present application;

[0041] Figure 7 is a schematic diagram of the structure of a power module provided in an embodiment of the present application;

[0042] Figure 8 This is one of the flow charts of the intelligent control method provided in the embodiment of the present application;

[0043] Fig. 9 This is the second flow chart of the intelligent control method provided in the embodiment of the present application;

[0044] Fig.10 This is the third flow chart of the intelligent control method provided in the embodiment of the present application;

[0045] Fig.11 is a schematic diagram of a terminal device provided in an embodiment of the present application;

[0046] Figure numerals: communication module 100, control module 200, charge and discharge control unit 201, power-on control unit 202, charge and discharge 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 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. DETAILED DESCRIPTION

[0047] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0048] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0049] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0050] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

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

[0052] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0053] In today's society, the popularity of electronic products and people's dependence on them are increasing day by day. As one of the core components supporting these high-tech devices, the importance of batteries is self-evident. Since the advent of lithium-ion batteries in 1980, this technology has perfectly met the high requirements of electronic products for power performance with 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 a leader in the field of rechargeable batteries, the charging and discharging technology of lithium batteries as their supporting equipment has also undergone profound changes and continuous optimization. However, how to efficiently and flexibly manage batteries of different usage states and specifications is still a technical problem that needs to be solved urgently.

[0054] Therefore, the present application proposes an intelligent management method, terminal device and computer-readable storage medium for lithium batteries, which optimize the use and maintenance process of lithium batteries through intelligent voltage detection, capacity testing and charging decisions, especially for used lithium batteries, to achieve accurate management and optimized utilization of lithium batteries, while ensuring battery safety and reliability, and maximizing resource utilization.

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

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

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

[0058] See also Figure 1 The circuit structure diagram of an embodiment of the intelligent charging and discharging circuit shown is, by way of example and not limitation, comprising:

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

[0060] A control module 200, which 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 instructions received by the communication module 100;

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

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

[0063] The intelligent charging and discharging circuit provided in the embodiment of the present application realizes intelligent charging and discharging management of N lithium batteries through the cooperation among 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 communicating with the electronic device, can receive control instructions from the electronic device, and can send circuit status information to the electronic device.

[0065] Exemplarily, the electronic device may be a PC (Personal Computer), such as a desktop, a laptop, a small laptop, a tablet, and an ultrabook, etc. It should be noted that any device with the function of sending control instructions and receiving information can be used as the electronic device mentioned in this application, and this application does not limit this.

[0066] Exemplarily, the circuit status information includes: circuit temperature, voltage and current of the charge and discharge module 300 .

[0067] Exemplarily, the communication module 100 may be an RS485 interface circuit, and the control module 200 communicates with the electronic device via 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] Exemplarily, the control module 200 can accurately control various parameters of the charge and discharge module 300 according to the control instructions, such as: charging target voltage, maximum charging current, charging cutoff current, discharge target voltage, maximum discharge current, etc. The control module 200 can flexibly control the charge and discharge process according to the control instructions, and ensure the safety and efficiency of the charge and discharge process, and can also be compatible with different models of lithium batteries.

[0070] Under the control of the control module 200 , the charge and discharge module 300 is responsible for charging or discharging N lithium batteries.

[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 the voltage sampling data to obtain the voltage sampling value and the current sampling value. The sampling data can be used to understand the charging and discharging status in real time, so as to perform precise control and avoid the occurrence of problems such as overcharging and over-discharging.

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

[0073] In other possible embodiments, 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 control instructions to the control module 200 based on the analysis results, and the control module 200 then controls the charging and discharging process of the charging and discharging module 300 according to the control instructions.

[0074] It should also be noted that the control module 200 can adjust the charge and discharge strategy in real time according to the voltage and current data fed back by the sampling module 400 to ensure that each lithium battery can be charged and discharged under safe and stable conditions. This intelligent control mechanism helps prevent the occurrence of problems such as overcharging and over-discharging, thereby enhancing the stability and reliability of the entire system.

[0075] The following is explained in conjunction with specific usage scenarios. Taking the charging and discharging of POS machines as an example, lithium batteries, as one of the important components of POS machines, are particularly important in the daily use of POS machines. For machines returned after sales, their power is usually partially consumed or even completely consumed. At this time, the lithium battery of the POS machine needs to be charged first. However, for the case where the number of returned machines is large, charging each battery one by one takes a lot of time. The intelligent charging and discharging circuit proposed in this application can charge multiple lithium batteries at the same time. Compared with charging one by one, the parallel charging method can significantly reduce the overall charging and discharging time and effectively improve the charging and discharging efficiency; and, the present application manages the charging process of N lithium batteries through a unified intelligent charging and discharging circuit, which greatly simplifies the management operation. It only needs to send control instructions through electronic devices to achieve centralized control of all lithium batteries, without operating each lithium battery one by one, improving management efficiency and reducing errors and delays that may be caused by cumbersome operations; in addition, as demand grows, it can support a larger number of lithium batteries by adding a charging and discharging module 300 without major modifications to the existing circuit, and has good scalability.

[0076] In one possible implementation, see Figure 2 The control module 200 includes N charge and discharge control units 201 , and the charge and discharge control units 201 correspond to the charge and discharge modules 300 one by one. The charge and discharge control units 201 are used to control the charge and discharge process of the corresponding charge and discharge modules 300 .

[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 entire system and is responsible for managing the charging and discharging process of each lithium battery according to the control instructions. In order to achieve this function, N charging and discharging control units 201 are set inside the control module 200, and the N charging and discharging control units 201 correspond to the N charging and discharging modules 300 one by one, forming a precise control system, ensuring that each lithium battery can be managed independently and accurately, that is, the parameter adjustment during the charging and discharging process (such as charging current, discharging current, charging and discharging cut-off voltage, etc.) can be performed independently for different states of each lithium battery.

[0078] It should also be noted that the control instruction also includes the address of the charge and discharge control unit 201 , so the control instruction can be accurately transmitted to each charge and discharge control unit 201 , and individual control of each charge and discharge control unit 201 can be achieved.

[0079] In one possible implementation, see Figure 2 , the intelligent charging and discharging circuit also includes:

[0080] The lithium battery in-place detection module 500 is coupled to the control module 200 and each charge and discharge module 300 , and is used to detect whether the lithium battery is connected to the charge and discharge module 300 , and to 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 and discharge module 300, which can prevent safety problems such as short circuit and overcurrent caused by improper battery installation. In addition to safety detection, the lithium battery in-place detection module 500 can also provide real-time feedback of the battery connection status to the control module 200, and the control module 200 can then adjust the charge and discharge strategy or issue a corresponding warning signal according to the actual connection status of the battery.

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

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

[0084] For example, the presence of the battery can be detected by a mechanical switch that is triggered when the battery is inserted; or the presence of the battery can be detected by using a change in the magnetic field, that is, when the battery is close to the sensor, it will change the magnetic field around the sensor, thereby triggering a detection signal; or the presence of the battery can be detected by reflecting or blocking light, that is, when the battery is inserted, it will block or reflect specific light, thereby triggering a detection signal. This application does not limit the specific method of battery presence detection.

[0085] In addition, it should be noted that the lithium battery in-place detection module 500 can detect the battery in-place status of each charging and discharging module 300 and give the detection results one by one; in the case of a large number of charging and discharging modules 300, a detection result can also be given for the battery in-place status of multiple charging and discharging modules 300. For example, in the case of N being 288, a comprehensive detection result can be given for the battery in-place status of the 1st to 48th charging and discharging modules 300, that is, if all of 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 out-of-place signal is given; for the 49th to 96th, 97th to 144th, 145th to 192nd, 193th to 240th and 241st to 288th charging and discharging modules 300, the above-mentioned method can also be adopted to give the detection results. In this way, the number of transmitted signals can be reduced, and the burden of system data transmission can be reduced.

[0086] In one possible implementation, see Figure 2 The control module 200 includes a power-on control unit 202, and the intelligent charging and discharging circuit also includes:

[0087] A power module 600, the power module 600 is coupled to the charge and discharge module 300, and is used to provide power to the charge and discharge module 300;

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

[0089] The power-on control unit 202 has an input terminal coupled to the lithium battery presence detection module 500 and an output terminal coupled to the switch module 700 . The power-on control unit 202 is used to control the switch module 700 according to the detection result of the lithium battery presence detection module 500 .

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

[0091] In some possible implementations, the power module 600 can provide voltages of +12V, -12V, +5V, and +3.3V. Among them, +12V and +5V use a DC-DC step-down method; +3.3V uses a linear voltage regulator; -12V is a negative voltage circuit based on the switching characteristics of the transistor, and when used, a square wave of about 1KHz is required to switch the transistor. Figure 7When PWM is at a low level, transistor Q72 is turned on, transistor Q71 is turned off, VCC charges capacitor C71 through transistor Q72, and the charging circuit is VCC-transistor Q72-capacitor C71-diode D72-GND, with capacitor C71 being positive on the left and negative on the right. When PWM is at a high level, transistor Q72 is turned off, transistor Q71 is turned on, capacitor C71 starts to discharge, and the discharge circuit is: capacitor C71-capacitor C72-diode D1, which is also the process of charging capacitor C72. After capacitor C72 is charged, it is positive at the bottom and negative at the top.

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

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

[0094] In some possible implementations, the switch module 700 can be an AC contactor, which is an automatic switching device that connects or disconnects the load main circuit. It uses electromagnetic force to close or disconnect the switch. It is suitable for frequent operation and remote control of high-voltage circuits, and has low-voltage release protection performance.

[0095] It should also be noted that during use, based on the detection result of the lithium battery presence detection module 500, the power-on control unit 202 will 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 will instruct the switch module 700 to turn on, allowing the AC power supply to power the power module 600; if the lithium battery is not in place, the power-on control unit 202 will instruct the switch module 700 to turn off to ensure system safety.

[0096] The overall workflow of powering on the circuit is described below. When the system is powered on, the lithium battery presence detection module 500 first detects the status of the lithium battery. If the lithium battery is in place, the detection result will be sent to the power-on control unit 202; the power-on control unit 202 controls the switch module 700 to turn on according to the detection result, allowing the AC power supply to power the power module 600; after receiving the electrical energy, the power module 600 converts it into current and voltage specifications suitable for the charge and discharge module 300, and provides electrical energy for the charge and discharge process of the lithium battery; finally, the charge and discharge module 300 charges or discharges the lithium battery. If it is found that the lithium battery is not in place during the detection, the power-on control unit 202 will control the switch module 700 to disconnect the power module 600 from the AC power supply.

[0097] In one possible implementation, see Figure 2 , the circuit status information includes: circuit temperature, the intelligent charging and discharging circuit also includes:

[0098] The temperature detection module 800 is coupled to the electronic device and is used 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 used to monitor the temperature of the circuit in real time. Through a high-precision temperature sensor, the module can accurately obtain the current temperature value of the circuit. In addition, the temperature detection module 800 can transmit the detected temperature information to the electronic device so that the electronic device can perform further processing or response.

[0100] Exemplarily, when the electronic device determines that the temperature value obtained by the sampling module 400 exceeds the preset temperature threshold, it will output a power-off instruction to the control module 200, and the control module 200 will control the switch module 700 to cut off the connection between the power module 600 and the charging and discharging module 300. It should be noted that the preset temperature threshold is determined based on factors such as the design requirements of the circuit, the heat resistance of the materials used, and safety standards. Once the circuit temperature reaches or exceeds this threshold, it means that the circuit may be in an overheated state, and there is a safety risk such as damage or fire.

[0101] In some possible implementations, the intelligent charging and discharging circuit also includes a cooling fan. The fan keeps running when the power is on. Even after the circuit temperature is too high and the power is cut off, the fan will continue to work until the temperature drops to a preset level and then automatically powers on.

[0102] In one possible implementation, see Figure 2 , the charge and discharge module 300 includes:

[0103] A charging unit 301, which is coupled to the control module 200 and is used to charge the lithium battery under the control of the control module 200;

[0104] The discharge unit 302 is coupled to the control module 200 and is used 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 charge the lithium battery safely and effectively. The charging unit 301 is connected to the control module 200 and receives control signals from the control module 200, including instructions such as starting charging, stopping charging, and adjusting charging parameters. By communicating with the control module 200, the charging unit 301 can flexibly respond to different charging needs.

[0106] The main function of the discharge unit 302 is to control the lithium battery to release electrical energy outward. Similar to the charging unit 301, the discharge unit 302 is also connected to the control module 200 and receives discharge instructions from the control module 200, including starting discharge, stopping discharge, adjusting discharge power, etc.

[0107] In one possible implementation, see Figure 3 , the charging unit 301 includes:

[0108] A first control switch K1, wherein an input terminal of the first control switch K1 is coupled to a voltage output terminal, and a control terminal of the first control switch K1 is coupled to the control module 200;

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

[0110] A capacitor, one end of which is coupled to the other end of the inductor L, and the other end of which is 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 below. The charging unit 301 provided in the embodiment of the present application adopts a BUCK type DC step-down switching power supply mode, uses a single-chip microcomputer to generate a 47KHZ PWM pulse signal, and controls the first control switch K1 through IR2104, thereby controlling the entire BUCK (step-down conversion) circuit. When the first control switch K1 is turned on, the inductor L converts the current flowing through it 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 transmitted to the load through the voltage output end and forms a loop with the freewheeling diode D, and the capacitor C converts the charge into current to supply power to the load. After continuously turning on and off the first control switch K1, VCC generates a pulsating voltage, and the pulsating voltage is converted into a more stable DC voltage through the LC filter circuit and transmitted to the load. The voltage value of the output voltage is proportional to the time when the first control switch K1 is turned on in one cycle. When external factors cause the output voltage or current to change, the output voltage and current are collected in real time by the 12-bit ADC of the microcontroller, and the duty cycle of the first control switch K1 is adjusted in real time, thereby forming a closed-loop voltage control circuit to achieve the purpose of constant current and constant voltage output.

[0113] In one possible implementation, see Figure 4 , the discharge unit 302 includes:

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

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

[0116] A load resistor RL, one end of the load resistor RL is coupled to the lithium battery, and the other end of the load resistor RL is coupled to the input end of the second control switch K2;

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

[0118] The principle and working process of the discharge unit 302 are introduced below. The discharge unit 302 is mainly composed of an operational amplifier OP and a second control switch K2, and is a constant current source circuit with adjustable current. The constant current source circuit designed with the operational amplifier OP introduces feedback. Compared with the triode constant current source, the operational amplifier OP constant current source has sufficient accuracy and adjustability. Utilizing the "virtual short" characteristic of the operational amplifier OP, the in-phase voltage Vin+ is equal to the inverted voltage Vin-. At the same time, the inverting input terminal of the circuit is also 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 unchanged, so no matter how the external circuit changes, the current flowing through the sampling resistor R1 is unchanged; the current of the RL load is equal to the current of the sampling resistor R1, so even if the power supply of the RL load is a variable voltage power supply, the current of the RL load is also kept fixed and unchanged, achieving the effect of constant current; the output current can be controlled by controlling the Vin+ input using the DAC function of the microcontroller.

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

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

[0121] A voltage sampling unit 401 , one end of which is coupled to the charge and discharge module 300 , and the other end of which is coupled to the control module 200 ;

[0122] The current sampling unit 402 has one end coupled to the charge and discharge module 300 , and the other end coupled to the control module 200 .

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

[0124] The voltage sampling unit 401 is responsible for measuring the voltage of the charge and discharge 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 passing through the charge and discharge module 300 and transmitting the collected current data to the control module 200.

[0125] In one possible implementation, see Figure 5 and Figure 6 , the current sampling unit 402 includes:

[0126] The switching chip U1 includes a plurality of output interfaces. The input of the switching chip U1 is coupled to the charging and discharging module 300 to obtain the sampling current of the charging and discharging module 300 and switch different output interfaces according to the size of the sampling current.

[0127] The signal amplifier chip U2 has an input end coupled to the output interface of the switching chip U1 and an output end coupled to the control module 200 . The signal amplifier chip U2 is used to amplify the sampling current output by the switching chip U1 and output the amplified sampling current to the control module 200 .

[0128] It should be noted that the charge and discharge module 300 requires the maximum charge and discharge current to reach 3A, and the current sampling range is relatively large. In order to ensure the sampling accuracy, the current sampling unit 402 provided in the embodiment of the present application adopts a graded sampling method, that is, it is divided into 4 levels according to the current size: 0~250mA, 251~500mA, 501~1000mA and 1001~3000mA. The function of the switching chip U1 is switch switching, that is, according to the current gear range, the actual current is switched to different input pins of the signal amplifier chip U2, and then the signal amplifier chip U2 amplifies the sampled current in proportion and outputs it to the control module 200.

[0129] The above are the execution entities of the various methods provided in this application.

[0130] The intelligent management method of lithium batteries provided by the present application is described below through specific embodiments.

[0131] The present application embodiment provides a method for intelligent management of lithium batteries. Figure 8 The intelligent management method is applied to an intelligent charging and discharging system, and the intelligent management method includes:

[0132] Step S100: collecting voltages at both ends of the N lithium batteries to obtain N sampled voltages;

[0133] Step S200: determining whether N sampled voltages are within a corresponding first preset voltage range;

[0134] Step S300: performing a capacity test on each lithium battery whose sampling voltage is within the first preset voltage range to obtain an actual battery capacity of each lithium battery;

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

[0136] Step S500: charging a lithium battery whose actual battery capacity is greater than a preset capacity threshold.

[0137] It should be noted that in step S100, the system collects voltages across N lithium batteries to obtain N sampled 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 sampled voltage is within the corresponding first preset voltage range. The first preset voltage range is usually set according to the safe operating voltage range of the battery. This step is basic battery status monitoring, which is used to preliminarily evaluate the safety of the battery and whether it 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, over-discharging or short circuit.

[0139] In some possible embodiments, the judgment 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 at both ends of the lithium battery, the sampled voltage is output to the control module, which is processed by the control module and sent to the electronic device via the communication module. The electronic device performs a range judgment on the sampled voltage in combination with the first preset voltage range.

[0140] In step S300, for lithium batteries whose sampled voltage is within the first preset voltage range, the system further performs a capacity test. Capacity testing is a key step in evaluating the actual electrical energy storage capability of a battery.

[0141] In some possible embodiments, the charging and discharging steps included in the capacity test process 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 an electronic device. It should be noted that the charging and discharging module performs charging and discharging operations on the lithium battery under the control instructions issued by the electronic device.

[0142] After obtaining the actual battery capacity of each lithium battery, the system compares the actual battery capacity with the preset capacity threshold. The capacity threshold is a value set based on battery performance, usage requirements or safety standards to determine whether the battery still has sufficient capacity to meet 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 batteries whose actual battery capacity is greater than the preset capacity threshold. This step is based on the comprehensive judgment results of all the previous steps, and is intended to ensure that only 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 instruction issued by the electronic device.

[0145] The lithium battery intelligent management method provided in the embodiment of the present application can avoid charging or discharging batteries with abnormal voltages through voltage range detection, thereby reducing the risks of safety accidents such as battery short circuits and fires and improving safety; and, through capacity testing, batteries that still have sufficient capacity can be identified to avoid premature elimination of batteries that can still be used, thereby maximizing resource utilization; and, the battery intelligent management method provided in the present application only charges batteries that meet specific voltage and capacity conditions, which can reduce unnecessary charge and discharge cycles of the battery and save resources.

[0146] In addition, it should be noted that the intelligent management method of lithium batteries provided in the present application realizes intelligent management of lithium batteries, that is, the entire process is automatically completed based on the intelligent charging and discharging system, which reduces manual intervention, improves management efficiency and accuracy, and can also manage multiple lithium batteries at the same time, flexibly controlling the charging and discharging process of each lithium battery.

[0147] In summary, the lithium battery intelligent management method provided in the embodiment of the present application optimizes the use and maintenance process of lithium batteries through intelligent voltage detection, capacity testing and charging decisions, while ensuring the safety and reliability of the battery, and realizing the precise management of lithium batteries and the maximum utilization of resources. Especially in the process of battery recycling and secondary utilization, the solution of the present application can be used to identify which batteries still have sufficient capacity and can continue to be used instead of being directly scrapped, which helps to reduce resource waste and promote the development of the circular economy.

[0148] In one possible implementation, see 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 is performed according to the discharge instruction issued by the electronic device;

[0151] Step S303: If the voltage across the lithium battery is less than a first preset voltage value, discharging is stopped, and the discharge current and discharge duration of the discharge process are recorded;

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

[0153] It should be noted that this embodiment introduces a battery capacity test process, which utilizes an intelligent charging and discharging system to perform steps such as charging, discharging, and recording relevant data, and obtains the actual capacity of the battery by calculation. In order to better understand this application, the principle of the battery capacity test proposed in this application is first explained.

[0154] The capacity of a lithium battery refers to the amount of electricity it can hold, and the unit is usually "ampere-hour" or "milliampere-hour". For example, if the capacity of a lithium battery is 500mAh, it means that if the working current is 10mA, the battery 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 as parameters. Because the minimum discharge voltage of a lithium battery is 2.75V, a voltage less than 3V is meaningless for lithium battery capacity testing, so the termination voltage is generally set to 3V.

[0155] The battery capacity test process includes two stages: battery charging and battery discharging. The battery needs to be fully charged first, 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 a termination voltage of 3V. First, the battery is charged until the voltage across it reaches 4.2V. Then, a constant-current discharge with a discharge current of 1300mA is performed on it, and the discharge duration is recorded as 1.8 hours. The actual capacity of the battery is 1300mA*1.8h=2340mAh.

[0157] After understanding the above capacity test principle, an implementation method of step S300 in the embodiment of the present application is introduced below, including steps S301 to S304.

[0158] Specifically, in step S301, first, each lithium battery within a first preset voltage range is charged according to a charging instruction issued by an electronic device.

[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, and charging cut-off current. Exemplarily, the charging instruction includes: 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 may be performed by a charging and discharging 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 means that the battery has approached or reached its charging limit, and the charging process should be stopped at this time.

[0162] In some possible embodiments, the above current monitoring process may be performed by a 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. Different first preset current values ​​can be set for different lithium batteries to flexibly cope with lithium batteries of different specifications.

[0164] Furthermore, for lithium batteries whose charging current is 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 the discharge process, which is conducive to precise control of the discharge process and avoiding 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 discharge process of each lithium battery, such as the discharge target voltage and the maximum discharge current.

[0166] During the discharge process, the intelligent charge and discharge circuit will continuously monitor the voltage across the lithium battery. If the voltage across the lithium battery drops to a value lower than the first preset voltage, the system will immediately stop discharging. This is because the voltage of a lithium battery is closely related to its remaining power. As the discharge progresses, the battery voltage will gradually decrease. When the battery voltage drops to the preset voltage value, it means that the battery has approached or reached its lower discharge limit. Continuing to discharge may damage 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 lithium batteries of more specifications.

[0168] In addition, the system will record the discharge current and discharge duration, which are the key data for calculating the actual capacity of the battery. Based on the recorded discharge current and discharge time, the system can calculate the total amount of electricity released by the battery during the discharge process (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 temperature effect.

[0170] It should also be noted that the lithium battery intelligent management method provided in the embodiment of the present application relies on the aforementioned intelligent charging and discharging system. The intelligent management method is described below in combination with the composition of the aforementioned intelligent charging and discharging system. First, the charging instruction is transmitted from 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 correspondingly, so as to realize flexible parameter control of each charging and discharging module; during the charging process, the sampling module 400 continuously collects the charging current of each lithium battery and outputs it to the control module 200, which is then transmitted to the electronic device after being processed by the control module 200; when the electronic device determines that the charging current of a 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 performs constant current discharge on the lithium battery; during the constant current discharge process, the sampling module 400 collects the voltage at both ends of the lithium battery. If the voltage at both ends of the lithium battery is less than the first preset voltage value, the discharge is stopped, and the discharge current and discharge duration of the discharge process are recorded, and the actual capacity of the battery is determined accordingly.

[0171] It should also be noted that since the intelligent charging and discharging circuit provided in the present application can charge and discharge up to N batteries at the same time, and calculate the actual battery capacity of N batteries by recording the discharge current and discharge duration of N batteries, the battery capacity testing 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 charging the lithium battery according to the charging instruction includes:

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

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

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

[0176] In step A100, the intelligent charging and discharging circuit performs constant current charging on the lithium battery according to the first charging instruction. The constant current charging stage is to quickly increase the battery power when the battery power is low, because in this stage the relationship between the battery voltage and the charging current is relatively linear, and electrical energy can be absorbed quickly.

[0177] During the constant current charging process, the voltage across the lithium battery is continuously obtained. When the sampled voltage value reaches a second preset voltage value, it indicates that the battery is close to being fully charged. At this time, the charging strategy needs to be adjusted to avoid overcharging, because overcharging may damage the battery.

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

[0179] The lithium battery intelligent control method provided in the embodiment of the present application combines constant current charging and constant voltage charging, and dynamically adjusts the charging strategy according to the changes in the lithium battery voltage and charging current, thereby ensuring the efficiency and safety of the lithium battery charging process. In addition, the intelligent control method provided in the embodiment of the present application can set different charging parameters for each battery, and can control the charging process of each battery individually, with high flexibility.

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

[0181] It should be noted that in the embodiment of the present application, the charging process of each lithium battery is controlled by an independent charging sub-instruction. For example, for lithium battery No. 1, the first charging instruction includes a first charging sub-instruction corresponding thereto, which is specifically used to control the constant current charging process of lithium battery No. 1. The second charging instruction also includes a second charging sub-instruction corresponding to lithium battery No. 1, which is specifically used to control the constant voltage charging process of lithium battery No. 1. Such a setting has many advantages.

[0182] First, the 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 at the same time, realizing the parallelization of the charging process. This greatly improves the charging efficiency, especially in scenarios where a large number of lithium batteries need to be charged quickly.

[0183] In addition, the flexibility of the charging process is improved. Independent charging sub-instructions can customize the charging strategy for each lithium battery, such as different charging currents, voltage limits or charging times. This flexibility enables the system to adapt to different types of lithium batteries or meet different charging requirements, improving the applicability of the system.

[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 promptly detect and deal with potential charging problems, such as overcharging or battery overheating, and further adjust the charging parameters to protect the lithium battery from damage and improve the safety of the overall system.

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

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

[0187] In a possible implementation, before performing a capacity test on the lithium battery whose sampling voltage is within the first preset voltage range, the intelligent management method further includes:

[0188] Step B100: Determine whether the lithium battery is connected to the intelligent charging and discharging system.

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

[0190] In addition, it should be noted that step B100 can be executed by the lithium battery in-place detection module 500 to determine whether 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, see Fig.10 , step S500, comprising:

[0192] Step S501: performing constant current charging on the lithium battery according to a third charging instruction issued by an electronic device;

[0193] Step S502: determining 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 the fourth charging instruction issued by the electronic device;

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

[0196] Step S505: If yes, stop charging.

[0197] It should be noted that for batteries that meet the capacity test conditions, it can be considered that they can continue to be used, but after the capacity test is completed, their power has been discharged. In order to continue to use them, the lithium battery that has undergone capacity testing needs to be charged again. The charging process adopts a constant current and then constant voltage charging method.

[0198] Specifically, in step S501, the intelligent charging and discharging circuit performs constant current charging on the lithium battery according to the third charging instruction. The constant current charging stage is to quickly increase the battery power when the battery power is low. During the constant current charging process, the voltage across the lithium battery is continuously obtained. When the sampled voltage value reaches the third preset voltage value, it indicates that the battery is close to its fully charged 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] During the constant voltage charging stage, the charging current needs to be continuously monitored. 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. Instead, it may increase the heat and stress of the battery and shorten the battery life. Therefore, if the charging current is less than the second preset current value, it is judged that the battery is fully charged and the charging process ends.

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

[0201] Therefore, in the above embodiment, the efficiency and safety of the lithium battery charging process are ensured by combining the constant current charging and constant voltage charging stages and dynamically adjusting the charging strategy according to the changes in the lithium battery voltage and charging current.

[0202] Step S500 is explained below in conjunction with the composition of the intelligent charging and discharging system. In step S501, the third charging instruction is transmitted from 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; during the constant current charging process, the sampling module 400 continuously collects the voltage across the lithium battery and outputs it to the control module 200, which is then 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 enable the charging and discharging module 300 to perform constant voltage charging on the lithium battery; during the constant voltage charging process, the sampling module 400 continuously collects the current flowing through the lithium battery and outputs it to the control module 200, which is then 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 one possible implementation, the third charging instruction includes multiple third charging sub-instructions, and each third charging sub-instruction corresponds to controlling a constant current charging process of a lithium battery; the fourth charging instruction includes multiple fourth charging sub-instructions, and each third charging sub-instruction corresponds to controlling 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 capacity testing, the charging process of each lithium battery is still flexibly carried out under the corresponding control instructions. For example: for lithium battery No. 1, it has completed the battery capacity test process, and after judgment, its battery capacity is suitable for continued use, so it needs to be charged. The charging process includes two processes: constant current charging and constant voltage charging. The constant current charging process is carried out under the corresponding third charging sub-instruction, and the constant voltage charging process is carried out under the corresponding fourth charging sub-instruction. The benefits of such a setting are the same as the settings of the aforementioned 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 discharge process, and having high scalability. Please refer to the previous text for specific details, which will not be repeated here.

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

[0206] It should be noted that lithium batteries with a battery capacity greater than the preset capacity threshold can be reused, but lithium batteries with a battery capacity not greater than the preset capacity threshold will have many problems if they are continued to be used. The most direct impact is that the battery life of the device using the lithium battery is shortened, and users need to charge the device frequently; in addition, the reduction in battery capacity may cause the device to respond more slowly and fail to operate at optimal performance; it may also cause the device to unexpectedly shut down or restart, which not only affects the user experience, but may also cause data loss or damage. Therefore, for batteries whose battery capacity does not meet the preset capacity threshold, a replacement prompt should be given, and continued use is not recommended.

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

[0208] The terminal device 1000 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device may include, but is not limited to, a processor 1001 and a memory 1002. Those skilled in the art will appreciate that Fig.11 It is only an example of the terminal device 1000 and does not constitute a limitation on the terminal device 1000 , and may include more or fewer components than shown in the figure, or a combination of certain components, or different components, for example, it may also include input and output devices, network access devices, etc.

[0209] The processor 1001 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

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

[0211] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0212] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0213] An embodiment of the present application provides a computer program product. When the computer program product runs on a mobile terminal, the mobile terminal can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0214] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium can at least include: any entity or device that can carry the computer program code to the camera / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), electric carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0215] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

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

[0217] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0218] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0219] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A lithium battery intelligent management method, characterized in that: The intelligent management method is applied to an intelligent charging and discharging system, which includes an intelligent charging and discharging circuit and an electronic device. The intelligent charging and discharging system is used to manage the charging and discharging process of N lithium batteries, where N is a positive integer of 1 or greater than 1. The intelligent management method includes: Collecting voltages at both ends of the N lithium batteries to obtain N sampled voltages; Determine whether the N sampled voltages are within the corresponding first preset voltage range respectively; Performing a capacity test on each lithium battery whose sampling voltage is within the first preset voltage range to obtain an actual battery capacity of each lithium battery; Determine whether the actual battery capacity of each lithium battery is greater than the corresponding preset capacity threshold; Charge the lithium battery whose actual battery capacity is greater than the preset capacity threshold.

2. The intelligent management method according to claim 1, characterized in that: The performing a 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: Charging each of the lithium batteries according to a charging instruction issued by the electronic device; Determining whether the charging current of each lithium battery is less than the corresponding first preset current value; For a lithium battery whose charging current is less than the corresponding first preset current value, discharging the battery according to the discharge instruction issued by the electronic device; If the voltage across the lithium battery is less than a first preset voltage value, discharging is stopped, and the discharge current and discharge duration of the discharge process are recorded; The actual capacity of the corresponding lithium battery is determined according to the discharge current and the discharge time.

3. The intelligent management method according to claim 2, characterized in that: The charging instruction includes a first charging instruction and a second charging instruction, and charging the lithium battery according to the charging instruction includes: Performing constant current charging on the lithium battery according to the first charging instruction; Determining whether the voltage across the lithium battery reaches a second preset voltage value; If so, constant voltage charging is performed according to the second charging instruction.

4. The intelligent management method according to claim 3, characterized in that: The first charging instruction includes multiple first charging sub-instructions, each of which corresponds to controlling a constant current charging process of a lithium battery; the second charging instruction includes multiple second charging sub-instructions, each of which corresponds to controlling a constant voltage charging process of a lithium battery.

5. The intelligent management method according to claim 2, characterized in that: Before performing a capacity test on the lithium battery whose sampling voltage is within the first preset voltage range, the intelligent management method further includes: determining that the lithium battery has been connected to the intelligent charging and discharging system.

6. The intelligent management method according to claim 1, characterized in that: The charging of a lithium battery whose actual battery capacity is greater than a preset capacity threshold comprises: Performing constant current charging on the lithium battery according to a third charging instruction issued by an electronic device; Determining whether the voltage across the lithium battery reaches a third preset voltage value; If yes, perform constant voltage charging according to a fourth charging instruction issued by the electronic device; Determining whether the charging current of the lithium battery is less than a second preset current value; If yes, stop charging.

7. The intelligent management method according to claim 6, characterized in that: The third charging instruction includes multiple third charging sub-instructions, each of which corresponds to controlling a constant current charging process of a lithium battery; the fourth charging instruction includes multiple fourth charging sub-instructions, each of which corresponds to controlling a constant voltage charging process of a lithium battery.

8. The intelligent management method according to claim 1, characterized in that: The intelligent management method further includes: issuing a replacement reminder for lithium batteries whose 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: When the processor executes the computer program, the intelligent management method according to any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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