A battery pre-charging method, system, device and readable storage medium

Abstract

The application discloses a battery pre-charging method, system, device and readable storage medium. The method comprises the following steps: monitoring the OCV voltage of a battery to be started in real time; if the OCV voltage meets preset first-stage conditions, entering a first charging stage, charging the battery to be started with a first charging current until the OCV voltage of the battery to be started reaches preset second-stage conditions; when the OCV voltage of the battery to be started reaches the preset second-stage conditions, entering a second charging stage, charging the battery to be started with a second charging current, and starting the battery to be started when the monitored OCV voltage reaches a constant-current stage voltage, wherein the second charging current is adjusted according to the real-time monitored OCV voltage. The pre-charging stage is subdivided into two stages, and the pre-charging current is dynamically adjusted based on the capacity of the battery to be started and the monitored OCV voltage of the battery to be started, so that the charging time of the battery pre-charging stage is optimized and shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery charging, in particular to a battery pre-charging method, system, device and readable storage medium. BACKGROUND

[0002] With the continuous development of artificial intelligence, PDA, mobile phones and other intelligent devices gradually integrate into all aspects of people's life, and people's demand for PDA, mobile phones and other intelligent devices is increasing, and the demand for endurance time is getting longer and longer. When the device is out of power, it is urgent to start working quickly.

[0003] At present, when PDA, mobile phones and other intelligent devices are not used for a long time, the battery carried in them will be in a low-voltage and no-power state due to long-term non-charging storage, and more likely to be in an over-discharged state. At this time, the battery has too low power to start the PDA device, and needs to be connected to an adapter for charging. At present, the device battery is charged by the traditional battery charging method, which will go through four stages, namely Pre-Charge (pre-charging), Constant Current (constant current), Constant Voltage (constant voltage), and Re-charge (re-charging) stage. Among them, the pre-charging stage uses Ipre-chg (pre-charging current), that is, 100mA constant current charging, until the charging reaches the constant current stage, the device can be started. Pre-charging a low-voltage battery to the constant current stage to start up generally takes 20-30 minutes, and the pre-charging stage takes a long time, which seriously affects the use.

[0004] Therefore, the low-voltage battery pre-charging to start up needs too long pre-charging time, which affects the user's use, and becomes a technical problem that needs to be solved at present. SUMMARY

[0005] The present application aims to at least solve one of the above technical defects, and in view of this, the present application provides a battery pre-charging method, system, device and readable storage medium, which is used to solve the technical defect that the low-voltage battery pre-charging to start up needs too long pre-charging time, thereby affecting the user's use.

[0006] In order to achieve the above purpose, the present scheme is as follows:

[0007] A battery pre-charging method, comprising:

[0008] real-time monitoring the OCV voltage of the battery to be started;

[0009] If the OCV voltage meets the preset first stage condition, enter the first charging stage, and charge the battery to be started with a first charging current until the OCV voltage of the battery to be started reaches the preset second stage condition;

[0010] When the OCV voltage of the battery to be started reaches a preset second stage condition, a second charging stage is entered, and the battery to be started is charged at a second charging current until the monitored OCV voltage reaches a constant current stage voltage, and the battery to be started is started, wherein the second charging current is adjusted according to the real-time monitored OCV voltage.

[0011] Preferably, the second charging current is adjusted according to the real-time monitored OCV voltage, comprising:

[0012] At the starting moment of the second stage, the second charging current is a second initial charging current calculated based on the battery capacity of the battery to be started.

[0013] During the pre-charging process of the second stage, according to the real-time monitored OCV voltage, when the OCV voltage increases by a preset voltage step size, the second charging current is increased by a preset current step size.

[0014] Preferably, the first stage condition is that the OCV voltage is less than 2.8V, and the second stage condition is that the OCV voltage is in the range of 2.8V-3.2V.

[0015] Preferably, the first charging current is 0.05C, wherein C is the battery capacity of the battery to be started.

[0016] Preferably, the second initial charging current is 0.1C, wherein C is the battery capacity of the battery to be started.

[0017] Preferably, the preset voltage step size is 50mV, and the preset current step size is 50mA.

[0018] Preferably, the constant current stage voltage is 3.2V.

[0019] A battery pre-charging system can realize each step of the battery pre-charging method described above, comprising a terminal controller and a battery to be started.

[0020] The terminal controller comprises a PMIC control chip and a battery connector.

[0021] The battery to be started comprises an electric quantity meter, a battery cell, and a battery contact.

[0022] The battery connector is connected with the battery contact.

[0023] A battery pre-charging device comprises a memory and a processor.

[0024] The memory is used to store programs.

[0025] The processor is configured to execute the program to implement each step of the battery pre-charging method.

[0026] A readable storage medium having a computer program stored thereon, the computer program, when executed by a processor, implements each step of the battery pre-charging method.

[0027] From the above technical solution, it can be seen that the battery pre-charging method, system, device and readable storage medium provided by the embodiment of the application can realize the acceleration of pre-charging by subdividing the pre-charging stage into two stages, and if the OCV voltage meets the preset first-stage condition, the first charging stage is entered, and the pre-charging current is dynamically adjusted according to the capacity of the battery, so that the pre-charging time is shortened in the first charging stage compared with the original pre-charging method.

[0028] When the OCV voltage of the pre-starting battery reaches the preset second-stage condition, the second charging stage is entered, and the pre-starting battery is charged with the second charging current until the OCV voltage monitored reaches the constant-current stage voltage, and the pre-starting battery is started, wherein the second charging current is adjusted according to the real-time monitored OCV voltage. In the second pre-charging stage, as the OCV voltage of the pre-starting battery rises, the second charging current is dynamically increased according to the increase of the OCV voltage of the pre-starting battery, so that the pre-charging time is further shortened in the second charging stage compared with the original pre-charging method.

[0029] The application mainly optimizes the pre-charging stage of the battery, subdivides the pre-charging stage into two stages, and dynamically adjusts the pre-charging current based on the capacity of the pre-starting battery and the monitored OCV voltage of the pre-starting battery, so as to optimize and shorten the pre-charging time of the battery, so that the battery can enter the constant-current charging stage as soon as possible, and then the starting work of the device can be carried out. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0031] Figure 1 A flowchart of the battery pre-charging method disclosed by the application;

[0032] Figure 2A schematic diagram of an example of a battery pre-charging method provided by an embodiment of the present application is shown in the following figure;

[0033] Figure 3 A structural schematic diagram of a battery pre-charging system disclosed by the present application is shown in the following figure;

[0034] Figure 4 A hardware structural block diagram of a battery pre-charging device disclosed by the present application is shown in the following figure. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] The present application provides a battery pre-charging method, which can be applied to various smart devices such as mobile phones, tablet computers, smart watches, etc. The method is used to optimize and shorten the charging time in the battery pre-charging stage when the device battery voltage is too low to start up, so that the battery can enter the constant current charging stage as soon as possible, and then the device can start up.

[0037] Next, the technical solutions of the present application are introduced. The present application proposes the following technical solutions, which are described in detail below.

[0038] In the existing charging scheme, the battery is pre-charged by a fixed original pre-charging current of 100 mA in the pre-charging stage. The original pre-charging current is small, and the pre-charging stage time is long. Until the battery voltage meets the voltage of the constant current charging stage, the battery has not been fully charged, but its battery voltage can already achieve normal start-up. Therefore, to make the device start up and work as soon as possible, the main problem to be solved is to shorten the pre-charging stage time and make the battery voltage reach the voltage of the constant current charging stage as soon as possible.

[0039] The present application improves the charging process in the pre-charging stage. The original pre-charging current is changed from the fixed 100 mA limit. The pre-charging stage is divided into two stages, and the corresponding charging current is intelligently adjusted by real-time monitoring of the read battery voltage value. The charging efficiency of the pre-charging stage is improved, the battery voltage meets the requirements of the constant current charging stage as soon as possible, and the battery enters the constant current charging stage, which can be normally started up and used.

[0040] Figure 1 A flowchart of a battery pre-charging method disclosed by an embodiment of the present application is shown in the following figure, Figure 1 The method can include the following steps:

[0041] Step S1, real-time monitoring of the OCV voltage of the battery to be started.

[0042] Specifically, the OCV voltage is also called open circuit voltage, which refers to the terminal voltage of the battery in an open circuit state. The OCV voltage value of the battery to be started can be obtained by real-time monitoring of the built-in power meter in the battery. According to the OCV voltage value of the battery to be started, it is determined which of the two stages after the refinement of the pre-charging stage the current battery to be started is in, and the pre-charging current of the corresponding stage is configured. At the same time, in the second charging stage, in order to further improve the charging speed, the charging current can also be adjusted according to the real-time monitored OCV voltage.

[0043] Step S2, if the OCV voltage meets the preset first stage condition, enter the first charging stage, and charge the battery to be started with the first charging current until the OCV voltage of the battery to be started reaches the preset second stage condition.

[0044] Specifically, when the OCV voltage of the battery to be started is monitored to meet the preset first stage condition, the first charging stage is entered at this time. The first stage condition can be that when the detected OCV voltage of the battery to be charged is less than the first preset value, the battery is configured to charge in the first charging stage with the first charging current calculated based on the size of the battery capacity. In the first charging stage, since the voltage in the battery is very small or 0, the first charging stage is a small current charging mode, which prevents the problem of battery capacity and life attenuation caused by the loss of lithium electrolyte active material in the negative electrode of the battery due to the use of large current charging on the battery to be started in over-discharged state.

[0045] The first charging stage stops when the OCV voltage of the battery to be started is monitored to reach the preset second stage condition, and the battery to be started enters the second charging stage at this time.

[0046] Step S3, when the OCV voltage of the battery to be started reaches the preset second stage condition, enter the second charging stage, and charge the battery to be started with the second charging current until the monitored OCV voltage reaches the constant current stage voltage, and start the battery to be started, wherein the second charging current is adjusted according to the real-time monitored OCV voltage.

[0047] Specifically, when the OCV voltage of the battery to be started reaches the preset second stage condition, the battery to be started enters the second charging stage. There are two cases that meet the second charging stage. The first is that the voltage of the battery to be started is very low, and after charging in the first charging stage, the OCV voltage is raised to the second stage condition, so as to enter the second charging stage. The other is that the battery to be charged still retains a certain amount of power, and its OCV voltage directly meets the second stage condition at this time, so the battery to be charged does not need to go through the first charging stage and can directly enter the second charging stage process.

[0048] In the charging process of the second charging stage, the second charging current is dynamically adjusted according to the real-time monitored OCV voltage, so as to further improve the charging speed and charging efficiency. It can be understood that in the second charging stage, as the OCV voltage of the battery to be started rises, the activity of the pole piece and the electrolyte is improved, the polarization resistance is reduced, and the lithium intercalation capacity of the negative electrode is enhanced, so that a larger charging current than that in the first charging stage can be introduced in the second charging stage, but the charging current is not prone to be too large.

[0049] In the present application, the battery is charged with a first charging current calculated based on the capacity size of the battery and the first rate in the first stage, and a second charging current calculated based on the capacity size of the battery and the second rate larger than the first rate is used to charge the battery to be started in the second charging stage.

[0050] Meanwhile, in the second charging stage, the second charging current can also be dynamically adjusted with the increase of the OCV voltage of the battery to be started, specifically, it increases with the increase of the OCV voltage, and the OCV voltage and the second charging current are adjusted to the most suitable state for the equipment charging without generating lithium precipitation and shortening the charging time, so as to shorten the pre-charging time to the greatest extent, greatly reduce the time from battery over-discharge to the start-up stage, and increase the use experience of the customer.

[0051] As can be seen from the above technical solution, the battery pre-charging method provided by the embodiments of the present application subdivides the pre-charging stage into two stages by real-time monitoring the OCV voltage of the battery to be started. If the OCV voltage meets the preset first stage condition, the first charging stage is entered, and the battery to be started is charged with the first charging current until the OCV voltage of the battery to be started reaches the preset second stage condition. The first charging current can break through the original pre-charging current limit of 100 mA, and is dynamically adjusted according to the capacity of the battery, so that the charging speed is improved in the first charging stage compared with the original pre-charging method.

[0052] When the OCV voltage of the battery to be started reaches the preset second stage condition, the second charging stage is entered, and the battery to be started is charged with the second charging current until the monitored OCV voltage reaches the constant current stage voltage, and the battery to be started is started. The second charging current is adjusted according to the real-time monitored OCV voltage. In the second pre-charging stage, as the OCV voltage of the battery to be started rises, the second charging current is dynamically increased according to the increase of the OCV voltage of the battery to be started, so that the charging speed is improved again in the second charging stage compared with the original pre-charging method.

[0053] The application mainly aims at optimizing the pre-charging stage of the battery, subdivides the pre-charging stage into two stages, dynamically adjusts the pre-charging current size based on the capacity of the battery to be started and the monitored OCV voltage of the battery to be started, thereby optimizes and shortens the charging time of the battery pre-charging stage, makes the battery enter the constant current charging stage as soon as possible, and then performs the starting work of the equipment.

[0054] In some embodiments of the application, the process of adjusting the second charging current according to the real-time monitored OCV voltage in step S3 is introduced, which can specifically include:

[0055] In step S31, at the starting moment of the second stage, the second charging current is a second initial charging current calculated based on the battery capacity of the battery to be started.

[0056] Specifically, in the second charging stage, the OCV voltage of the battery to be started itself meets the second stage condition, compared with the first charging stage, the activity of the battery pole and the electrolyte is improved, the polarization resistance is reduced, and the lithium intercalation capacity of the negative electrode is enhanced, so the second initial charging current is introduced for charging at the beginning of the second charging stage, and the second initial charging current is larger than the first charging current.

[0057] In the application, the battery is charged with the first charging current calculated based on the battery capacity size and the first rate in the first stage, and the second charging current calculated based on the battery capacity size and the second rate is used to charge the battery to be started in the second charging stage. The first rate and the second rate are both non-fixed values that can be set by humans, and can be adjusted according to the characteristics of different batteries, but for most batteries, the first rate and the second rate are determined based on the empirical safety value measured by experiments, and considering the actual situation, the set first rate should be less than the second rate.

[0058] In step S32, during the pre-charging process in the second stage, the second charging current is increased by a preset gear current size according to the real-time monitored OCV voltage increased by a preset gear voltage size.

[0059] Specifically, in the pre-charging process in the second stage, the second charging current can be further dynamically adjusted, that is, the second charging current is increased according to the increase of the OCV voltage. Among them, the gear voltage and the gear current can be preset, and every time the gear voltage is increased by one gear, the second charging current is increased by one gear based on the current size.

[0060] For example, if the preset voltage level is 20mV and the preset current level is 20mA, and the OCV voltage of the battery to be charged is 2.5V when the second charging stage begins, charging starts with the calculated second initial charging current of 300mA. When the OCV voltage is detected to increase to 2.52V, the preset voltage level is increased, and the second charging current also increases from the second initial charging current of 300mA to 320mA, continuing to charge the battery at 320mA. When the OCV voltage is detected to increase to 2.54V, the preset voltage level is increased again, and the second charging current also increases from the current 320mA to 340mA, continuing to charge the battery at 340mA.

[0061] Compared to using a fixed charging current, the method of intelligently adjusting the second charging current based on the real-time monitored OCV voltage can always keep the battery under charging in the most suitable state for the device, where the OCV voltage and charging current do not produce lithium plating and the charging time is shortened, thus minimizing the pre-charging time.

[0062] In some embodiments of this application, based on any of the above embodiments, the first stage condition can be that the OCV voltage is less than 2.8V, and the second stage condition can be that the OCV voltage is in the range of 2.8V to 3.2V.

[0063] Optionally, the first charging current can be 0.05C, where C is the battery capacity of the battery to be started.

[0064] Optionally, the second initial charging current is 0.1C, where C is the battery capacity of the battery to be started.

[0065] Optionally, the preset voltage setting can be 50mV, and the preset current setting can be 50mA.

[0066] Optionally, the voltage during the constant current stage can be 3.2V.

[0067] The following is combined Figure 2 The provided schematic diagram illustrates an example of a battery pre-charging method, using a 5000mAh battery as an example to illustrate this application.

[0068] In this example, the OCV voltage of the battery to be charged is acquired in real time using a fuel gauge. If the detected OCV voltage meets the first stage condition (i.e., the detected OCV voltage is less than 2.8V), the battery enters the first charging stage. If the detected OCV voltage is within the range of 2.8V to 3.2V, then the battery meets the second stage condition and directly enters the second charging stage.

[0069] In this example, the OCV voltage of the battery to be charged is less than 2.8V, meeting the first stage condition, and entering the first charging stage. In the first charging stage, the first charging current is 0.05C, i.e. 250mA, and the battery to be charged is charged at 250mA until the OCV voltage of the battery to be charged is monitored to reach 2.8V, meeting the second stage condition, and the first charging stage ends and enters the second charging stage.

[0070] After entering the second charging stage, the battery to be charged is first charged at a second initial charging current of 0.1C, i.e. 500mA, and when the OCV voltage is monitored to increase to 2.85V, at this time a preset voltage of 50mV is increased by one, then the second charging current is also increased by one current step size of 550mA on the basis of the second initial charging current of 500mA, and the battery to be charged is continuously charged at 550mA.

[0071] When the OCV voltage is monitored to increase to 2.90V, at this time a preset voltage is increased by one, then the second charging current is also increased from the current second charging current of 550mA to 600mA, and the battery to be charged is continuously charged at 600mA.

[0072] Thereafter, when the OCV voltage is monitored to increase to 2.95V, the second charging current is synchronously increased to 650mA, and when the OCV voltage is monitored to increase to 3V, the second charging current is synchronously increased to 700mA.

[0073] In the process of charging the battery to be charged at 700mA, the OCV voltage of the battery to be charged is monitored to reach the constant current stage voltage of 3.2V, at this time the battery enters the constant current charging stage, and the device can be started.

[0074] Experimental tests show that the pre-charging method provided in the present application can be shortened from the original 20-30 minutes to less than 5 minutes, greatly reducing the time from battery over-discharge to reaching the constant current voltage stage, so that the battery enters the constant current charging stage as soon as possible, and then the device is started.

[0075] Next, a battery pre-charging system provided by an embodiment of the present application is described. The battery pre-charging system described below can be mutually corresponding to the battery pre-charging method described above, and can implement each step of the battery pre-charging method described above.

[0076] Referring to Figure 3 , Figure 3 FIG. 1 is a structural schematic diagram of a battery pre-charging system according to an embodiment of the present application.

[0077] As shown in Figure 3 , the system can include a terminal controller and a battery to be started.

[0078] The terminal controller comprises a PMIC control chip and a battery connector.

[0079] The battery to be started comprises an electric quantity meter, an electric core and a battery contact point.

[0080] The battery connector is connected with the battery contact point.

[0081] From the above technical solution, it can be seen that the battery pre-charging system provided by the embodiment of the application subdivides the pre-charging stage into two stages by monitoring the OCV voltage of the battery to be started in real time. If the OCV voltage meets the preset first-stage condition, the first charging stage is entered, and the battery to be started is charged with the first charging current until the OCV voltage of the battery to be started reaches the preset second-stage condition. The first charging current can break through the limitation of the original pre-charging current fixed at 100 mA, and is dynamically adjusted according to the capacity of the battery, so that the first charging stage realizes speed-up of one-time charging compared with the original pre-charging mode.

[0082] When the OCV voltage of the battery to be started reaches the preset second-stage condition, the second charging stage is entered, and the battery to be started is charged with the second charging current until the OCV voltage monitored reaches the constant-current stage voltage, and the battery to be started is started. The second charging current is adjusted according to the OCV voltage monitored in real time. In the second pre-charging stage, as the OCV voltage of the battery to be started rises, the second charging current is dynamically increased step by step according to the increase of the OCV voltage of the battery to be started, so that the second charging stage realizes speed-up of charging again compared with the original pre-charging mode.

[0083] The application mainly optimizes the pre-charging stage of the battery, subdivides the pre-charging stage into two stages, dynamically adjusts the pre-charging current according to the capacity of the battery to be started and the OCV voltage of the battery to be started monitored, so as to optimize and shorten the charging time of the pre-charging stage of the battery, make the battery enter the constant-current charging stage as soon as possible, and then start the work of the equipment.

[0084] The battery pre-charging system provided by the embodiment of the application can be applied to a battery pre-charging device. Optionally, Figure 4 A hardware structure block diagram of a battery pre-charging device is shown, and the hardware structure of the battery pre-charging device can comprise at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4. Figure 4

[0085] ​In the embodiments of the present application, the number of the processor 1, the communication interface 2, the memory 3 and the communication bus 4 is at least one, and the processor 1, the communication interface 2 and the memory 3 complete the communication with each other through the communication bus 4;

[0086] The processor 1 can be a central processing unit CPU, or an application specific integrated circuit ASIC, or one or more integrated circuits configured to implement the embodiments of the present application, etc.

[0087] The memory 3 can include a high-speed RAM memory, and can also include a non-volatile memory, such as at least one disk memory, etc.

[0088] The memory stores a program, and the processor can call the program stored in the memory, and the program is used for:

[0089] Real-time monitoring of the OCV voltage of the battery to be started;

[0090] If the OCV voltage meets the preset first stage condition, a first charging stage is entered, and the battery to be started is charged with a first charging current until the OCV voltage of the battery to be started reaches a preset second stage condition;

[0091] When the OCV voltage of the battery to be started reaches the preset second stage condition, a second charging stage is entered, and the battery to be started is charged with a second charging current until the monitored OCV voltage reaches a constant current stage voltage, and the battery to be started is started, wherein the second charging current is adjusted according to the real-time monitored OCV voltage.

[0092] Optionally, the detailed functions and extended functions of the program can refer to the description above.

[0093] The embodiments of the present application also provide a readable storage medium which can store a program suitable for the processor to execute, and the program is used for:

[0094] Real-time monitoring of the OCV voltage of the battery to be started;

[0095] If the OCV voltage meets the preset first stage condition, a first charging stage is entered, and the battery to be started is charged with a first charging current until the OCV voltage of the battery to be started reaches a preset second stage condition;

[0096] When the OCV voltage of the battery to be started reaches a preset second stage condition, a second charging stage is entered, and the battery to be started is charged with a second charging current until the monitored OCV voltage reaches a constant current stage voltage, and the battery to be started is started, wherein the second charging current is adjusted according to the real-time monitored OCV voltage.

[0097] Optionally, the refinement function and the extension function of the program can refer to the above description.

[0098] Finally, it should be noted that the terms such as first and second are used herein only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0099] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0100] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of battery pre-charging, the method comprising: The method comprises the following steps: monitoring the OCV voltage of the battery to be started in real time; if the OCV voltage meets the preset first-stage condition, entering the first charging stage to charge the battery to be started with a first charging current until the OCV voltage of the battery to be started reaches the preset second-stage condition; when the OCV voltage of the battery to be started reaches the preset second-stage condition, entering the second charging stage to charge the battery to be started with a second charging current until the monitored OCV voltage reaches the constant-current stage voltage, and starting the battery to be started, wherein the second charging current is adjusted according to the real-time monitored OCV voltage; the second charging current is adjusted according to the real-time monitored OCV voltage, comprising: at the starting moment of the second stage, the second charging current is a second initial charging current calculated based on the battery capacity of the battery to be started; in the second-stage pre-charging process, the second charging current is increased by a preset step current size in synchronization with the increase of the real-time monitored OCV voltage by a preset step voltage size.

2. The method of claim 1, wherein, The first-stage condition is that the OCV voltage is less than 2.8V, and the second-stage condition is that the OCV voltage is within the range of 2.8V-3.2V.

3. The method of claim 1, wherein, The first charging current is 0.05C, wherein C is the battery capacity of the battery to be started.

4. The method of claim 1, wherein, The second initial charging current is 0.1C, wherein C is the battery capacity of the battery to be started.

5. The method of claim 1, wherein, The preset step voltage is 50mV, and the preset step current is 50mA.

6. The method of claim 1, wherein, The constant-current stage voltage is 3.2V.

7. A battery pre-charge system characterized by, The terminal controller and the battery to be started can realize each step of the battery pre-charging method according to any one of claims 1-6. The terminal controller comprises a PMIC control chip and a battery connector. The battery to be started comprises a power gauge, a battery cell, and a battery contact point. The battery connector is connected with the battery contact point.

8. A battery pre-charge apparatus, characterized by, The computer program is executed by the processor to realize each step of the battery pre-charging method according to any one of claims 1-6. The computer program is executed by the processor to realize each step of the battery pre-charging method according to any one of claims 1-6. ​ 9. A readable storage medium, having stored thereon a computer program, characterized in that, ​

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