Battery charging control method, device and storage medium

Abstract

The application provides a battery charging control method, device and storage medium, including: a controller acquires a charging parameter of a battery, if the charging parameter meets a first charging state, controls a charging device to charge the battery in a first charging mode. If the charging parameter meets a second charging state, controls the charging device to charge the battery in a second charging mode. The application divides the charging process of the battery into different charging states, and the controller can determine the charging state of the battery according to the charging parameter of the battery, so as to determine the charging mode of the battery, and control the charging device to charge the battery in different charging modes. While improving the charging speed of the battery, the electrochemical polarization phenomenon is reduced, the damage to the battery is reduced, the charging safety of the battery is ensured, and the user's fast charging experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical automation, and in particular to a battery charging control method, device and storage medium. BACKGROUND

[0002] With the wide application of electric vehicles, customers have higher and higher requirements for the charging experience of electric vehicles. Too slow charging makes users wait for a long time, which seriously affects the further popularization and application of electric vehicles.

[0003] In the prior art, a constant current charging method can be used to charge the vehicle battery. During constant current charging, the voltage of the battery has a smooth process. Under the premise that the power and voltage platform of the vehicle battery are certain, the charging time needs to be reduced, which can only be achieved by increasing the charging current.

[0004] That is, the current fast charging method is to increase the charging current. However, too large current can easily cause safety problems such as battery fire and explosion, and too large current can cause serious electrochemical polarization, resulting in incomplete charging of the battery and prolonging the charging time. Severe electrochemical polarization can cause serious heating of the battery and metal crystallization on the negative electrode surface, affecting the cycle life of the battery and even the safety of the battery. SUMMARY

[0005] The present application provides a battery charging control method, device and storage medium to improve the charging speed of the battery while reducing the damage to the battery.

[0006] In a first aspect, the present application provides a battery charging control method, which is applied to a controller, and the method comprises:

[0007] obtaining a charging parameter of the battery;

[0008] if the charging parameter meets a first charging state, controlling a charging device to charge the battery in a first charging mode; wherein in the first charging mode, the battery is periodically charged, each period includes a first charging period and a first pressure release period, the battery is charged with a first constant current in the first charging period, the battery is stopped charging in the first pressure release period, and the length of the first charging period in each period shows an increasing trend;

[0009] if the charging parameter satisfies a second charging state, controlling the charging device to charge the battery in a second charging mode, wherein in the second charging mode, the battery is periodically charged, each period including a second charging period, a third charging period and a second pressure release period, the battery is charged at a second constant current in the second charging period, the battery is charged at a first constant voltage in the third charging period, and the battery is not charged in the second pressure release period, the amplitude of the second constant current corresponding to each period presents a decreasing trend, the length of the second charging period in each period presents an increasing trend, and the amplitude of the first constant voltage corresponding to each period presents an increasing trend.

[0010] In an embodiment, the charging state includes an end voltage of the battery and a state of charge of the battery.

[0011] The charging parameter satisfying the first charging state specifically includes that the end voltage of the battery is greater than a first voltage threshold, and the state of charge is greater than a first state of charge threshold.

[0012] The charging parameter satisfying the second charging state specifically includes that the end voltage of the battery is greater than a second voltage threshold, and the state of charge is greater than a second state of charge threshold.

[0013] The first voltage threshold is less than the second voltage threshold, and the first state of charge threshold is less than the second state of charge threshold.

[0014] In an embodiment, the length of the third charging period in each period presents a decreasing trend, and the length of the second pressure release period in each period is constant; or,

[0015] The length of the third charging period in each period is constant, and the length of the second pressure release period in each period presents a decreasing trend.

[0016] In an embodiment, the method further includes:

[0017] if the charging parameter satisfies a third charging state, controlling the charging device to charge the battery in a third charging mode, wherein in the third charging mode, the battery is periodically charged, each period including a fourth charging period and a third pressure release period, the battery is charged at a second constant voltage in the fourth charging period, and the battery is not charged in the third pressure release period, the amplitude of the second constant voltage corresponding to each period presents an increasing trend, and the length of the fourth charging period in each period presents an increasing trend.

[0018] In an embodiment, the charging parameter satisfying the third charging state specifically includes:

[0019] The end voltage of the battery is greater than a third voltage threshold, and the state of charge is greater than a third state of charge threshold.

[0020] The third voltage threshold is greater than the second voltage threshold, and the third state of charge threshold is greater than the second state of charge threshold.

[0021] In an embodiment, the method further comprises:

[0022] If the charging parameter satisfies a fourth charging state, controlling the charging device to charge the battery in a fourth charging mode, wherein the battery is charged with a third constant current in the fourth charging mode;

[0023] If the charging parameter satisfies a fifth charging state, controlling the charging device to charge the battery in a fifth charging mode, wherein the battery is charged with a fourth constant current in the fifth charging mode;

[0024] The first constant current is greater than the second constant current;

[0025] The second constant current is greater than the fourth constant current;

[0026] The fourth constant current is greater than the third constant current.

[0027] In an embodiment,

[0028] The charging parameter satisfies a fourth charging state, specifically comprising: the terminal voltage of the battery is less than a first voltage threshold, and the state of charge is less than a first state of charge threshold;

[0029] The charging parameter satisfies a fifth charging state, specifically comprising: the terminal voltage of the battery is greater than a fourth voltage threshold, and the state of charge is greater than a fourth state of charge threshold;

[0030] The fourth voltage threshold is greater than the third voltage threshold, and the fourth state of charge threshold is greater than the third state of charge threshold.

[0031] In a second aspect, the application provides a battery charging control device, which comprises:

[0032] An acquisition module, configured to acquire a charging parameter of the battery;

[0033] If the charging parameter satisfies a first charging state, a processing module is configured to control a charging device to charge the battery in a first charging mode; wherein the battery is periodically charged in the first charging mode, each period comprising a first charging period and a first pressure relief period, the battery is charged with a first constant current in the first charging period, the battery is stopped charging in the first pressure relief period, and the length of the first charging period in each period shows an increasing trend;

[0034] If the charging parameter satisfies a second charging state, the processing module is further configured to control the charging device to charge the battery in a second charging mode, wherein in the second charging mode, the battery is periodically charged, each period including a second charging period, a third charging period and a second pressure releasing period, the battery is charged with a second constant current in the second charging period, the battery is charged with a first constant voltage in the third charging period, and the battery is not charged in the second pressure releasing period, the amplitude of the second constant current corresponding to each period decreases in a decreasing trend, the length of the second charging period in each period increases in an increasing trend, and the amplitude of the first constant voltage corresponding to each period increases in an increasing trend.

[0035] In a third aspect, the present application provides a controller, comprising: a processor, and a memory connected with the processor in communication;

[0036] The memory stores computer-executable instructions.

[0037] The processor executes the computer-executable instructions stored in the memory to implement the method of any one of the first aspect.

[0038] In a fourth aspect, the present application provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by a processor to implement the method of any one of the first aspect.

[0039] In a fifth aspect, the present application provides a computer program product, comprising a computer program, and the computer program is executed by a processor to implement the method of any one of the first aspect.

[0040] The application provides a battery charging control method, device and storage medium. In the application, a controller acquires a charging parameter of a battery. If the charging parameter meets a first charging state, the controller controls a charging device to charge the battery in a first charging mode. In the first charging period, the constant current charging time gradually increases, and the battery is rapidly charged to the maximum limit at the optimal period when the battery can receive a larger current. In the first pressure relief period, the resistance polarization of the battery disappears, and the concentration polarization and the electrochemical polarization gradually weaken, and no gas is generated in the first pressure relief period. Compared with a charging method without pressure relief, the application generates less gas in the first charging mode, the electrochemical polarization is weaker, the electrochemical polarization has a smaller effect on the extension of the charging time, the battery charging speed is improved, and the damage to the battery is reduced. If the charging parameter meets a second charging state, the controller controls the charging device to charge the battery in a second charging mode. Since the electrochemical polarization phenomenon of the battery is not obvious at this time, the electrochemical polarization phenomenon gradually strengthens along with the continuous charging, and therefore, the second constant current amplitude corresponding to each period presents a decreasing trend. In order to improve the charging speed, the length of the second charging period in each period presents an increasing trend. In order to improve the charging speed, the amplitude of the first constant voltage corresponding to each period presents an increasing trend. In the second pressure relief period, the resistance polarization of the battery disappears, and the concentration polarization and the electrochemical polarization also gradually weaken, and no gas is generated in the second pressure relief period, so that the battery charging speed is improved, and the damage to the battery is reduced. The application divides the charging process of the battery into different charging states, the controller can determine the charging state of the battery according to the charging parameter of the battery, so as to determine the charging mode of the battery, and the charging device is controlled to charge the battery in different charging modes. In this way, the electrochemical polarization phenomenon is reduced, the damage to the battery is reduced, the charging safety of the battery is ensured, and the user's fast charging experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0042] Figure 1 The application provides an application scenario diagram of the battery charging control method.

[0043] Figure 2 The application provides a flowchart of the battery charging control method embodiment one.

[0044] Figure 3 The application provides a flowchart of the battery charging control method embodiment two.

[0045] Figure 4 A schematic flowchart of Embodiment 3 of the battery charging control method provided in this application;

[0046] Figure 5 A schematic diagram of the structure of an embodiment of the battery charging control device provided in this application;

[0047] Figure 6 A schematic diagram of the structure of a controller provided in this application;

[0048] Figure 7 A schematic diagram of the charging curve of the battery provided in this application. Detailed Implementation

[0049] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0050] In today's world, the environment and energy are two major challenges facing humanity. Electric vehicles (EVs) are vehicles powered by onboard electricity, using electric motors to drive the wheels, and meeting all road traffic and safety regulations. Compared to traditional cars, EVs have a smaller environmental impact, and their prospects are widely viewed as promising. However, with the widespread adoption of EVs, customers have increasingly higher demands for the charging experience. Slow charging times result in excessively long waiting periods for users, seriously hindering the further promotion and application of EVs.

[0051] In existing technologies, constant current charging can be used to charge vehicle batteries. During constant current charging, the voltage stabilizes. Given a fixed battery capacity and voltage plateau, reducing charging time can only be achieved by increasing the charging current. In other words, current fast charging methods involve increasing the charging current. However, excessive current can easily cause battery fires, explosions, and other safety issues. Furthermore, excessive current can lead to severe electrochemical polarization, resulting in incomplete charging and prolonged charging time. Severe electrochemical polarization can cause excessive battery heating and metal crystallization on the negative electrode surface, affecting the battery's cycle life and even its safety.

[0052] To address the problems existing in the prior art, the inventors, during their research on battery charging methods, discovered that if a battery charging control method existed that divided the battery charging process into different charging states, the controller could determine the battery's charging state based on its charging parameters and control the charging device to charge the battery in different charging modes. In different charging modes, the battery's charging duration and the amplitude of its charging current or voltage would differ. This would increase the battery's charging speed while reducing electrochemical polarization and the amount of gas generated during electrolysis, thereby minimizing damage to the battery, ensuring charging safety, and improving the user's fast charging experience. Based on the above inventive concept, the battery charging control scheme described in this application was designed.

[0053] The battery charging control scheme of this application will be described in detail below.

[0054] Figure 1 This is a schematic diagram illustrating an application scenario of the battery charging control method provided in this application, such as... Figure 1 As shown, the application scenario may include: a controller 101, a charging device 102, and at least one charging battery 103.

[0055] For example, in Figure 1 In the application scenario shown, when the user needs to charge the battery 103, the charging device 102 is connected to the battery 103, the controller 101 is connected to the battery 103, and the controller 101 is connected to the charging device 102.

[0056] The controller 101 can acquire the charging parameters of the battery 103. Based on these parameters, the controller 101 determines the charging state of the battery 103. If the charging parameters meet the first charging state, the controller 101 controls the charging device 102 to charge the battery 103 in a first charging mode; if the charging parameters meet the second charging state, the controller 101 controls the charging device 102 to charge the battery 103 in a second charging mode; if the charging parameters meet the third charging state, the controller 101 controls the charging device 102 to charge the battery in a third charging mode; if the charging parameters meet the fourth charging state, the controller 101 controls the charging device 102 to charge the battery in a fourth charging mode; and if the charging parameters meet the fifth charging state, the controller 101 controls the charging device 102 to charge the battery in a fifth charging mode.

[0057] The charging device 102 charges the battery 103 according to the charging state determined by the controller 101. When the charging device 102 charges the battery 103 in a first charging mode, it periodically charges the battery 103 in the first charging mode. Each cycle includes a first charging period and a first decompression period. During the first charging period, the battery 103 is charged with a first constant current. During the first decompression period, charging stops. The duration of the first charging period in each cycle increases. When the charging device 102 charges the battery 103 in a second charging mode, it periodically charges the battery 103 in the second charging mode. Each cycle includes a second charging period, a third charging period, and a second decompression period. During the second charging period, the battery 103 is charged with a second constant current. During the third charging period, the battery 103 is charged with a first constant voltage. During the second decompression period, charging stops. The amplitude of the second constant current in each cycle decreases. The duration of the second charging period in each cycle increases. The amplitude of the first constant voltage in each cycle also increases. When the charging device 102 charges the battery 103 in the third charging mode, it periodically charges the battery 103 in this mode. Each cycle includes a fourth charging period and a third decompression period. During the fourth charging period, the battery 103 is charged with a second constant voltage, and charging stops during the third decompression period. The amplitude of the second constant voltage increases with each cycle, and the duration of the fourth charging period also increases with each cycle. When the charging device 102 charges the battery 103 in the fourth charging mode, it charges the battery with a third constant current. When the charging device 102 charges the battery 103 in the fifth charging mode, it charges the battery with a fourth constant current.

[0058] Based on the above process, the controller can determine the battery's charging state according to the battery's charging parameters and control the charging equipment to charge the battery in different charging modes. In different charging modes, the battery's charging period duration and the amplitude of the charging current or voltage vary. This increases the battery's charging speed while reducing electrochemical polarization and the amount of gas generated during electrolysis, thus minimizing damage to the battery, ensuring charging safety, and enhancing the user's fast charging experience.

[0059] It should be noted that, Figure 1 This is merely a schematic diagram illustrating one application scenario provided by an embodiment of this application. This embodiment does not necessarily represent... Figure 1 The document does not limit the actual form of the various devices included, nor does it specify the form of the devices. Figure 1 The interaction methods between devices are limited, and can be set according to actual needs in the specific application of the solution.

[0060] The technical solution of this application will now be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0061] Figure 2 A schematic flowchart illustrating an embodiment of the battery charging control method provided in this application. See also... Figure 2 The battery charging control method specifically includes the following steps:

[0062] Step S201: The controller acquires the battery charging parameters.

[0063] When the battery is connected to the controller, the controller acquires the battery's charging parameters. These charging parameters are used to determine the battery's state of charge. The battery's charging parameters may include the battery's terminal voltage and its state of charge (SOC), where SOC refers to the available state of the remaining charge in the battery, typically expressed as a percentage.

[0064] Specifically, battery charging parameters may also include a battery identifier, which indicates the battery type. When the battery is connected to the controller, the controller acquires the battery type. The controller stores a correspondence between battery types and their charging curves. Based on the acquired battery type and the stored correspondence, the controller filters and adapts the battery to determine its appropriate charging curve. The controller can determine the battery's state of charge based on its terminal voltage, state of charge, and charging curve. Understandably, different battery types correspond to different charging curves. Understandably, during battery charging, the controller can optimize the charging curve based on the charging results to better serve the user.

[0065] Step S202: If the charging parameters meet the first charging state, control the charging device to charge the battery in the first charging mode.

[0066] The controller determines that the battery's charging state meets the first charging state based on the battery's charging parameters. Based on this charging state, the controller determines the charging mode of the charging device to be the first charging mode. The controller then controls the charging device to charge the battery using the first charging mode.

[0067] Specifically, the state of charge of a battery includes the battery's terminal voltage and the battery's state of charge.

[0068] The charging parameters that satisfy the first charging state specifically include: the battery terminal voltage is greater than the first voltage threshold, and the state of charge is greater than the first state of charge threshold.

[0069] For example, the first voltage threshold can be 80% or 75% of the nominal voltage, the first charge threshold can be 10% or 15%. This embodiment does not limit the magnitude of the first voltage threshold, the first charge threshold and the nominal voltage, and can be selected according to the actual situation.

[0070] For example, Figure 7 This is a schematic diagram of the charging curve of the battery provided in this application. Each type of battery corresponds to a charging curve, and this battery's charging curve is the charging curve of one type of battery among multiple battery types, combined with... Figure 7 It can be seen that:

[0071] If the charging parameters meet the first charging state, the charging device is controlled to charge the battery in the first charging mode; wherein, in the first charging mode, the battery is charged periodically, each cycle includes a first charging period and a first decompression period, the battery is charged with a first constant current during the first charging period, and the charging of the battery is stopped during the first decompression period, and the duration of the first charging period in each cycle shows an increasing trend.

[0072] Specifically, the controller controls the charging device to charge the battery with a first constant current, in the form of a% of the first charging period in each cycle, increasing by b% according to the number of cycles. For example, in the Nth cycle, the percentage of the first charging period is a% + N*b%, until it is maintained at 100%. This embodiment does not specifically limit the value of a% for the percentage of the first charging period; it can be 45% or 50%, depending on the actual situation. This embodiment also does not specifically limit the increment value of the percentage of the first charging period; it can be 0.9% or 1.0%, depending on the actual situation. This embodiment does not limit the magnitude of the first constant current in the first charging period; the first constant current can be the maximum current that the battery can currently receive, and can be selected according to the actual situation.

[0073] Optionally, the controller can determine the first constant current amplitude of the battery based on the battery's first charging mode and the battery's charging parameters.

[0074] Specifically, when the battery is connected to the controller, the controller acquires the battery type. The controller stores a correspondence between battery types and their charging curves. Based on the acquired battery type and the stored correspondence, the controller filters and adapts the battery to determine its charging curve. The controller can determine that the battery's charging state meets a first charging state based on the battery's terminal voltage, state of charge (SBC), and charging curve. Based on the SBC, the controller determines the charging mode of the charging device to be the first charging mode. Based on the charging mode, the battery's terminal voltage, and SBC, the controller determines the point on the charging curve corresponding to the current SBC. Finally, the controller determines the battery's first constant current amplitude based on the corresponding point on the charging curve.

[0075] Optionally, when the controller determines that the battery is in the first decompression period based on the battery's first charging mode and the battery's charging parameters, the controller controls the charging equipment to stop charging the battery until the first decompression period ends, and then enters the first charging period of the next cycle.

[0076] During the first charging phase, the constant current charging time gradually increases, maximizing rapid charging during the optimal period when the battery can accept a large current. During the first decompression phase, the battery's resistive polarization disappears, and concentration polarization and electrochemical polarization gradually weaken. No gas is generated during this phase, thus increasing the charging speed while minimizing damage to the battery. If the battery's charging parameters meet the second charging state, the controller directs the charging equipment to charge the battery in the second charging mode.

[0077] Step S203: If the charging parameters meet the second charging state, control the charging device to charge the battery in the second charging mode.

[0078] The controller determines that the battery's charging state meets the second charging state based on the battery's charging parameters. Based on this state, the controller determines the charging mode of the charging device to be the second charging mode and controls the charging device to charge the battery in this second charging mode.

[0079] The charging parameters that satisfy the second charging state specifically include: the battery terminal voltage is greater than the second voltage threshold, and the state of charge is greater than the second state of charge threshold;

[0080] Wherein, the first voltage threshold is less than the second voltage threshold, and the first charge threshold is less than the second charge threshold.

[0081] For example, the second charge threshold can be 70% or 75%. This embodiment does not limit the size of the second charge threshold and can be selected according to the actual situation.

[0082] For example, Figure 7This is a schematic diagram of the charging curve of the battery provided in this application. Each type of battery corresponds to a charging curve, and this battery's charging curve is the charging curve of one type of battery among multiple battery types, combined with... Figure 7 It can be seen that:

[0083] If the charging parameters meet the second charging state, the charging device is controlled to charge the battery in the second charging mode. In the second charging mode, the battery is charged periodically. Each cycle includes a second charging period, a third charging period, and a second decompression period. During the second charging period, the battery is charged with a second constant current. During the third charging period, the battery is charged with a first constant voltage. During the second decompression period, the charging of the battery stops. The amplitude of the second constant current corresponding to each cycle shows a decreasing trend, and the duration of the second charging period within each cycle shows an increasing trend. The amplitude of the first constant voltage corresponding to each cycle also shows an increasing trend.

[0084] Specifically, the controller controls the charging device to perform constant current charging of the battery using a second constant current, with the second charging period accounting for c% of each cycle. The amplitude of the second constant current decreases with the number of cycles, and the duration of the second charging period increases by d% with the number of cycles. For example, in the Nth cycle, the proportion of the second charging period is c% + N*d%, until it is maintained at 90%. In the third charging period, the controller controls the charging device to perform constant voltage charging of the battery using a first constant voltage, and the amplitude of the second constant voltage increases with the number of cycles.

[0085] Optionally, the duration of the third charging period in each cycle decreases, while the duration of the second decompression period in each cycle remains unchanged.

[0086] Optionally, the duration of the third charging period in each cycle remains unchanged, while the duration of the second decompression period in each cycle decreases.

[0087] Optionally, the controller can determine the second constant current amplitude and the second constant voltage amplitude of the battery based on the battery's second charging mode and the battery's charging parameters.

[0088] It should be noted that the controller determines the second constant current amplitude and the second constant voltage amplitude of the battery based on the battery's second charging mode and battery charging parameters in a similar way to determining the first constant current amplitude, and will not be repeated here.

[0089] Optionally, when the controller determines that the battery is in the second decompression period based on the battery's second charging mode and the battery's charging parameters, the controller controls the charging equipment to stop charging the battery until the second decompression period ends, and then enters the second charging period of the next cycle.

[0090] Because the electrochemical polarization of the battery is not significant at this stage, it gradually intensifies as charging progresses. Therefore, the amplitude of the second constant current corresponding to each cycle decreases. To improve charging speed, the duration of the second charging period within each cycle increases. To further improve charging speed, the amplitude of the first constant voltage corresponding to each cycle is also set to increase. During the second decompression period, the resistive polarization of the battery disappears, and both concentration polarization and electrochemical polarization gradually weaken. No gas is generated during the second decompression period, thus reducing damage to the battery while improving charging speed.

[0091] Understandably, in this embodiment, steps S202 and S203 are different steps determined according to the charging parameters, and steps S202 and S203 are not executed in sequence.

[0092] The battery charging control method provided in this embodiment involves a controller acquiring the battery's charging parameters. If the charging parameters meet the first charging state, the charging device is controlled to charge the battery in a first charging mode. During the first charging period, the constant current charging time gradually increases, maximizing rapid charging during the optimal period when the battery can receive a large current. During the first decompression period, the battery's resistive polarization disappears, and concentration polarization and electrochemical polarization gradually weaken. No gas is generated during the first decompression period. Compared to charging methods without a decompression period, the battery charging control method of this application improves the battery charging speed while reducing damage to the battery. If the charging parameters meet the second charging state, the charging device is controlled to charge the battery in a second charging mode. Because the battery's electrochemical polarization is not obvious at this time, and gradually increases as charging continues, the amplitude of the second constant current corresponding to each cycle decreases. To improve the charging speed, the duration of the second charging period within each cycle increases. To further improve the charging speed, the amplitude of the first constant voltage corresponding to each cycle is set to increase. During the second decompression period, the battery's resistive polarization disappears, and concentration polarization and electrochemical polarization gradually weaken. No gas is generated during this period, thus increasing the battery charging speed while reducing damage to the battery. This application divides the battery charging process into different charging states. The controller can determine the battery's charging state based on its charging parameters, thereby determining the charging mode and controlling the charging equipment to charge the battery using different modes. This increases the battery charging speed while reducing electrochemical polarization, minimizing battery damage, ensuring charging safety, and enhancing the user's fast charging experience.

[0093] Figure 3 A schematic flowchart illustrating Embodiment 2 of the battery charging control method provided in this application. See also... Figure 3 The battery charging control method specifically includes the following steps:

[0094] Step S301: The controller acquires the battery charging parameters.

[0095] It should be noted that step S301 is similar to step S201 in Embodiment 1, and will not be described again here.

[0096] Step S302: If the charging parameters meet the third charging state, control the charging device to charge the battery in the third charging mode.

[0097] The controller determines that the battery's charging state meets the third charging state based on the battery's charging parameters. Based on this state, the controller determines the charging mode of the charging device to be the third charging mode and controls the charging device to charge the battery in this third charging mode.

[0098] Specifically, the charging parameters that satisfy the third charging state include: the battery terminal voltage is greater than the third voltage threshold, and the state of charge is greater than the third state of charge threshold.

[0099] Among them, the third voltage threshold is greater than the second voltage threshold, and the third charge threshold is greater than the second charge threshold.

[0100] For example, the third charge threshold can be 85% or 90%. This embodiment does not limit the size of the third charge threshold and can be selected according to the actual situation.

[0101] For example, Figure 7 This is a schematic diagram of the charging curve of the battery provided in this application. Each type of battery corresponds to a charging curve, and this battery's charging curve is the charging curve of one type of battery among multiple battery types, combined with... Figure 7 It can be seen that:

[0102] If the charging parameters meet the third charging state, the charging device is controlled to charge the battery in the third charging mode. In the third charging mode, the battery is charged periodically. Each cycle includes a fourth charging period and a third decompression period. The battery is charged with a second constant voltage during the fourth charging period and charging stops during the third decompression period. The amplitude of the second constant voltage corresponding to each cycle increases, and the duration of the fourth charging period in each cycle also increases.

[0103] Specifically, the controller controls the charging device to perform constant-voltage charging of the battery at a second constant voltage, with the fourth charging period accounting for e% of each cycle. The amplitude of the second constant voltage increases with the number of cycles, and the duration of the fourth charging period increases by f% with the number of cycles. For example, in the Nth cycle, the fourth charging period percentage is e% + N*f%, until it is maintained at 100%. This application embodiment does not specifically limit the value of e% for the fourth charging period percentage; it can be 45% or 50%, depending on the actual situation. This application embodiment does not specifically limit the increment value f% for the fourth charging period percentage; it can be 0.9% or 1.0%, depending on the actual situation. This application does not specifically limit the increment ratio of the second constant voltage amplitude; it can be 110%, depending on the actual situation.

[0104] Furthermore, the controller determines the second constant voltage amplitude of the battery based on the battery's third charging mode and the battery's charging parameters.

[0105] It should be noted that the controller determines the second constant voltage amplitude of the battery based on the third charging mode and the battery charging parameters in a similar way to determining the first constant current amplitude, which will not be elaborated here.

[0106] Furthermore, when the controller determines that the battery is in the third decompression period based on the battery's third charging mode and charging parameters, the controller controls the charging equipment to stop charging the battery until the third decompression period ends, and then enters the fourth charging period of the next cycle.

[0107] The battery charging control method provided in this embodiment is executed through the following steps: the controller acquires the battery's charging parameters. If the charging parameters meet the third charging state, the charging device is controlled to charge the battery in the third charging mode. In this application, in the third charging mode, the battery is not yet fully charged, and the electrochemical polarization phenomenon is relatively severe. At this time, a constant voltage charging method is used. As the battery terminal voltage gradually increases, the current gradually decreases, and the enhancing effect on electrochemical polarization becomes smaller. Therefore, as charging continues, the fourth charging period can be set to continuously increase. In order to further improve the charging voltage, the amplitude of the second constant voltage corresponding to each cycle is set to increase. In the third decompression period, the resistive polarization of the battery disappears, and the concentration polarization and electrochemical polarization also gradually weaken. No gas is generated in the third decompression period. Compared with the charging method without a decompression period, the battery charging control method of this application improves the battery charging speed while reducing damage to the battery. This application charges the battery while ensuring safe charging and not accelerating electrochemical polarization to affect the battery cycle life, thus improving the user's fast charging experience.

[0108] Figure 4 A schematic flowchart illustrating Embodiment 3 of the battery charging control method provided in this application. See also... Figure 4 The battery charging control method specifically includes the following steps:

[0109] Step S401: The controller acquires the battery charging parameters.

[0110] It should be noted that step S401 is similar to step S201 in Embodiment 1, and will not be described again here.

[0111] Step S402: If the charging parameters meet the fourth charging state, control the charging device to charge the battery in the fourth charging mode.

[0112] The controller determines that the battery's charging state meets the fourth charging state based on the battery's charging parameters. Based on this state, the controller determines the charging mode of the charging device to be the fourth charging mode. The controller then controls the charging device to charge the battery using this fourth charging mode.

[0113] For example, Figure 7 This is a schematic diagram of the charging curve of the battery provided in this application. Each type of battery corresponds to a charging curve, and this battery's charging curve is the charging curve of one type of battery among multiple battery types, combined with... Figure 7 It can be seen that:

[0114] In the fourth charging mode, the controller controls the charging device to charge the battery with a third constant current.

[0115] Furthermore, the controller determines the third constant current amplitude of the battery based on the battery's fourth charging mode and the battery's charging parameters.

[0116] It should be noted that the controller determines the third constant current amplitude of the battery based on the fourth charging mode and the battery charging parameters in a similar way to determining the first constant current amplitude, which will not be repeated here.

[0117] Specifically, the charging parameters satisfy the fourth charging state, including: the battery terminal voltage is less than the first voltage threshold, and the state of charge is less than the first charge threshold.

[0118] Step S403: If the charging parameters meet the fifth charging state, control the charging device to charge the battery in the fifth charging mode.

[0119] The controller determines that the battery's charging state meets the fifth charging state based on the battery's charging parameters. Based on this state, the controller determines the charging mode of the charging device to be the fifth charging mode. The controller then controls the charging device to charge the battery using this fifth charging mode.

[0120] For example, Figure 7This is a schematic diagram of the charging curve of the battery provided in this application. Each type of battery corresponds to a charging curve, and this battery's charging curve is the charging curve of one type of battery among multiple battery types, combined with... Figure 7 It can be seen that:

[0121] In the fifth charging mode, the controller controls the charging device to charge the battery with a fourth constant current.

[0122] Specifically, the charging parameters satisfy the fifth charging state, including: the battery terminal voltage is greater than the fourth voltage threshold, and the state of charge is greater than the fourth charge threshold.

[0123] Among them, the fourth voltage threshold is greater than the third voltage threshold, and the fourth charge threshold is greater than the third charge threshold.

[0124] For example, the fourth charge threshold can be 95% or 97%. This embodiment does not limit the size of the fourth charge threshold and can be selected according to the actual situation.

[0125] Specifically, the first constant current is greater than the second constant current;

[0126] The second constant current is greater than the fourth constant current;

[0127] The fourth constant current is greater than the third constant current.

[0128] Optionally, the controller can determine the fourth constant current amplitude of the battery based on the battery's fifth charging mode and the battery's charging parameters.

[0129] It should be noted that the controller determines the fourth constant current amplitude of the battery based on the fifth charging mode and the battery charging parameters in a similar way to determining the first constant current amplitude, which will not be repeated here.

[0130] The battery charging control method provided in this embodiment is executed through the following steps: The controller determines whether the battery's charging state meets the fourth charging state or the fifth charging state based on the battery's charging parameters. The controller determines the charging mode of the charging device based on the charging state met by the battery's charging parameters. The controller controls the charging device to charge the battery according to the determined charging mode. In this application, in the fourth charging mode, the battery's SOC and voltage are extremely low, making it unsuitable for initial high-current charging because the battery has just undergone a discharge or even over-discharge process and needs a recovery process for the internal chemical substances. Therefore, a relatively small current is required to charge the battery. In the fifth charging mode, the battery is in the stage of being almost fully charged. Charging the battery with a small constant current ensures that the electrolyte does not generate bubbles, saving energy and protecting the battery plates. This is beneficial for battery health maintenance, extends battery life, and improves the user's fast charging experience.

[0131] Figure 5 This is a schematic diagram of the structure of an embodiment of the battery charging control device provided in this application; as shown below. Figure 5 As shown, the battery charging control device 50 includes:

[0132] The acquisition module 51 is used to acquire the charging parameters of the battery;

[0133] The processing module 52 is used to control the charging device to charge the battery in a first charging mode if the charging parameters meet the first charging state. In the first charging mode, the battery is charged periodically, and each cycle includes a first charging period and a first decompression period. During the first charging period, the battery is charged with a first constant current, and the charging of the battery is stopped during the first decompression period. The duration of the first charging period in each cycle increases.

[0134] The processing module 52 is further configured to control the charging device to charge the battery in a second charging mode if the charging parameters meet the second charging state. In the second charging mode, the battery is charged periodically, and each cycle includes a second charging period, a third charging period, and a second decompression period. During the second charging period, the battery is charged with a second constant current. During the third charging period, the battery is charged with a first constant voltage. During the second decompression period, the charging of the battery is stopped. The amplitude of the second constant current corresponding to each cycle decreases, and the duration of the second charging period within each cycle increases. The amplitude of the first constant voltage corresponding to each cycle also increases.

[0135] Furthermore, the state of charging includes the battery's terminal voltage and the battery's state of charge.

[0136] The charging parameters that satisfy the first charging state specifically include: the battery terminal voltage is greater than the first voltage threshold, and the state of charge is greater than the first state of charge threshold.

[0137] The charging parameters that satisfy the second charging state specifically include: the battery terminal voltage is greater than the second voltage threshold, and the state of charge is greater than the second state of charge threshold;

[0138] The first voltage threshold is less than the second voltage threshold, and the first charge threshold is less than the second charge threshold.

[0139] Furthermore, the duration of the third charging period within each cycle decreases, while the duration of the second decompression period remains unchanged within each cycle; or,

[0140] The duration of the third charging period in each cycle remains unchanged, while the duration of the second decompression period in each cycle shows a decreasing trend.

[0141] Furthermore, the processing module 52 is also configured to control the charging device to charge the battery in a third charging mode if the charging parameters meet the third charging state. In the third charging mode, the battery is charged periodically, and each cycle includes a fourth charging period and a third decompression period. The battery is charged with a second constant voltage during the fourth charging period and charging is stopped during the third decompression period. The amplitude of the second constant voltage corresponding to each cycle increases, and the duration of the fourth charging period in each cycle also increases.

[0142] Furthermore, the charging parameters meet the requirements of the third charging state, specifically including:

[0143] The battery's terminal voltage is greater than the third voltage threshold, and its state of charge is greater than the third state of charge threshold.

[0144] The third voltage threshold is greater than the second voltage threshold, and the third charge threshold is greater than the second charge threshold.

[0145] Furthermore, the processing module 52 is also configured to control the charging device to charge the battery in a fourth charging mode if the charging parameters meet the fourth charging state, wherein the battery is charged with a third constant current in the fourth charging mode.

[0146] Furthermore, the processing module 52 is also configured to control the charging device to charge the battery in a fifth charging mode if the charging parameters meet the fifth charging state, wherein the battery is charged with a fourth constant current in the fifth charging mode.

[0147] The first constant current is greater than the second constant current;

[0148] The second constant current is greater than the fourth constant current;

[0149] The fourth constant current is greater than the third constant current.

[0150] Furthermore, the charging parameters satisfy the fourth charging state, specifically including: the battery terminal voltage is less than the first voltage threshold, and the state of charge is less than the first charge threshold.

[0151] The charging parameters meet the fifth charging state, specifically including: the battery terminal voltage is greater than the fourth voltage threshold, and the state of charge is greater than the fourth charge threshold.

[0152] The fourth voltage threshold is greater than the third voltage threshold, and the fourth charge threshold is greater than the third charge threshold.

[0153] The battery charging control device provided in this embodiment is used to execute the technical solution in any of the foregoing method embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0154] Figure 6 This is a schematic diagram of the structure of a controller provided in this application. Figure 6 As shown, the controller 60 includes a memory 61 and a processor 62.

[0155] Among them, memory 61 is used to store computer instructions that can be executed by the processor;

[0156] The processor 62 implements the various steps of the method in the above embodiments when executing computer instructions. For details, please refer to the relevant descriptions in the foregoing method embodiments.

[0157] Optionally, the memory 61 can be either standalone or integrated with the processor 62. When the memory 61 is set up independently, the controller also includes a bus for connecting the memory 61 and the processor 62.

[0158] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the various steps in the methods described above.

[0159] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the various steps in the methods described above.

[0160] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0161] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery charging control method, characterized in that, The method is applied to a controller, and the method includes: Obtain the charging parameters of the battery; If the charging parameters meet the first charging state, the charging device is controlled to charge the battery in the first charging mode; wherein, in the first charging mode, the battery is charged periodically, each cycle includes a first charging period and a first decompression period, the battery is charged with a first constant current during the first charging period, and the charging of the battery is stopped during the first decompression period, and the duration of the first charging period in each cycle shows an increasing trend. If the charging parameters meet the second charging state, the charging device is controlled to charge the battery in a second charging mode. In the second charging mode, the battery is charged periodically. Each cycle includes a second charging period, a third charging period, and a second decompression period. During the second charging period, the battery is charged with a second constant current. During the third charging period, the battery is charged with a first constant voltage. During the second decompression period, charging of the battery is stopped. The amplitude of the second constant current corresponding to each cycle decreases, and the duration of the second charging period within each cycle increases. The amplitude of the first constant voltage corresponding to each cycle also increases.

2. The method according to claim 1, characterized in that, The charging state includes the battery's terminal voltage and the battery's state of charge; The charging parameters satisfying the first charging state specifically include: the battery terminal voltage being greater than a first voltage threshold, and the state of charge being greater than a first charge threshold; The charging parameters satisfying the second charging state specifically include: the battery terminal voltage being greater than a second voltage threshold, and the state of charge being greater than a second charge threshold; The first voltage threshold is less than the second voltage threshold, and the first charge threshold is less than the second charge threshold.

3. The method according to claim 1, characterized in that, The duration of the third charging phase within each cycle decreases, while the duration of the second decompression phase remains constant within each cycle; or, The duration of the third charging period in each cycle remains unchanged, while the duration of the second decompression period in each cycle shows a decreasing trend.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: If the charging parameters meet the third charging state, the charging device is controlled to charge the battery in the third charging mode. In the third charging mode, the battery is charged periodically. Each cycle includes a fourth charging period and a third decompression period. During the fourth charging period, the battery is charged with a second constant voltage. During the third decompression period, the charging of the battery is stopped. The amplitude of the second constant voltage corresponding to each cycle increases, and the duration of the fourth charging period in each cycle also increases.

5. The method according to claim 4, characterized in that, The charging parameters satisfy the third charging state, specifically including: The battery's terminal voltage is greater than a third voltage threshold, and its state of charge is greater than a third state of charge threshold. The third voltage threshold is greater than the second voltage threshold, and the third charge threshold is greater than the second charge threshold.

6. The method according to any one of claims 1-3, characterized in that, The method further includes: If the charging parameters satisfy the fourth charging state, control the charging device to charge the battery in the fourth charging mode, wherein the battery is charged with a third constant current in the fourth charging mode; If the charging parameters meet the fifth charging state, the charging device is controlled to charge the battery in the fifth charging mode, wherein the battery is charged with a fourth constant current in the fifth charging mode; The first constant current is greater than the second constant current; The second constant current is greater than the fourth constant current; The fourth constant current is greater than the third constant current.

7. The method according to claim 6, characterized in that, The charging parameters satisfy the fourth charging state, specifically including: the battery terminal voltage is less than the first voltage threshold, and the state of charge is less than the first state of charge threshold. The charging parameters satisfy the fifth charging state, specifically including: the battery terminal voltage is greater than the fourth voltage threshold, and the state of charge is greater than the fourth state of charge threshold. The fourth voltage threshold is greater than the third voltage threshold, and the fourth charge threshold is greater than the third charge threshold.

8. A controller, comprising: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method of any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method described in any one of claims 1 to 7.

10. A computer program product comprising a computer program that, when executed by a processor, implements the method of any one of claims 1 to 7.

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