Method and system for improving service life of battery

Abstract

The embodiment of the invention discloses a method and a system for improving the service life of a battery. The system for improving the service life of the battery comprises a vibration module and a controller, the vibration module is electrically connected with the controller, and the method for improving the service life of the battery is executed by the controller. The battery life improvement method comprises the steps of obtaining a current state and historical charging and discharging data of a target battery; and controlling the vibration module to apply mechanical vibration in a preset direction to the target battery according to the current state and the historical charging and discharging data of the target battery so as to balance the electrolyte concentration gradient of the target battery and prolong the service life of the target battery. According to the method and the system for improving the service life of the battery, the electrolyte concentration gradient of the target battery can be balanced, so that the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to battery management technology, and particularly relate to a battery life improvement method and system. BACKGROUND

[0002] During the charging and discharging process of the battery, the volume change of the negative electrode drives the migration of the electrolyte, and the difference in electrode permeability and the influence of gravity cause the electrolyte in the battery to accumulate at the top and bottom of the battery cell, forming a vertical concentration gradient. This concentration gradient cannot be effectively eliminated and will cause local concentration polarization to intensify and side reactions to accelerate, which is an important factor causing the "dive" of the battery capacity in the later stage and affects the battery life.

[0003] At present, the existing battery life improvement method is usually to improve the battery charging efficiency, shorten the battery charging time, reduce the risk of lithium precipitation, and prolong the battery life, but this way has the problem of unbalanced electrolyte concentration gradient of the battery, and the battery life will still be affected by the unbalanced electrolyte concentration gradient of the battery. SUMMARY

[0004] Embodiments of the present application provide a battery life improvement method and system to balance the electrolyte concentration gradient of the target battery, thereby improving the battery life.

[0005] In a first aspect, embodiments of the present application provide a battery life improvement method, and a battery life improvement system includes a vibration module and a controller, the vibration module is electrically connected with the controller, and the battery life improvement method is executed by the controller; the battery life improvement method includes:

[0006] obtaining the current state and historical charging and discharging data of a target battery;

[0007] According to the current state and historical charging and discharging data of the target battery, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery to balance the electrolyte concentration gradient of the target battery and improve the life of the target battery.

[0008] Optionally, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery according to the current state of the target battery, including:

[0009] When the target battery is in a stationary state and the target battery meets a preset condition according to the historical charging and discharging data of the target battery, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery.

[0010] Optionally, the target battery meets a preset condition according to the historical charging and discharging data of the target battery, including:

[0011] The target battery is determined to meet a preset condition when at least one of the following conditions is met: the target battery completes a high-rate charge-discharge cycle, the target battery completes a deep charge-discharge cycle, and a charge-discharge cycle period of the target battery reaches a preset threshold according to historical charge-discharge data of the target battery.

[0012] Optionally, the high rate is greater than or equal to 3C, the deep charge-discharge cycle is a charge-discharge cycle greater than or equal to 90% depth, and the preset threshold is 50 or 100.

[0013] Optionally, the control of the vibration module to apply the mechanical vibration of the preset direction to the target battery includes:

[0014] When the vibration module applies the mechanical vibration of the preset direction to the target battery for a preset time, the vibration module is controlled to stop working.

[0015] Optionally, the mechanical vibration has a frequency of 1-50 Hz, an amplitude of 0.1-5 mm, a time of 5-30 min, and a waveform of a sine wave.

[0016] Optionally, the preset direction is parallel to the electrode reaction interface of the target battery.

[0017] In a second aspect, an embodiment of the present application provides a battery life improvement system, including a vibration module and a controller, the vibration module being electrically connected to the controller, and the battery life improvement method as described in the first aspect being executed by the controller.

[0018] Optionally, the vibration module is a motor or an actuator.

[0019] Optionally, the vibration module is fixed to the top and the bottom of the target battery.

[0020] The battery life improvement method and system provided by the embodiment of the present application include a vibration module and a controller, the vibration module being electrically connected to the controller, and the battery life improvement method being executed by the controller. The battery life improvement method includes: obtaining a current state and historical charge-discharge data of a target battery; and controlling the vibration module to apply a mechanical vibration of a preset direction to the target battery according to the current state and the historical charge-discharge data of the target battery, so as to balance an electrolyte concentration gradient of the target battery and improve the life of the target battery. The battery life improvement method and system provided by the embodiment of the present application control the vibration module to apply a mechanical vibration of a preset direction, such as a direction parallel to an electrode reaction interface, to the target battery, drive electrolyte convection, promote the balance between the electrolyte concentration of a low-concentration area and the electrolyte concentration of a high-concentration area, balance the electrolyte concentration gradient of the target battery, and improve the battery life. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a flow chart of a battery life improvement method provided by Embodiment One of the present application;

[0022] Figure 2 is a schematic diagram of a charging voltage provided by Embodiment One of the present application;

[0023] Figure 3 is a schematic diagram of a charging current provided by Embodiment One of the present application;

[0024] Figure 4 is a schematic diagram of an electrolyte concentration provided by Embodiment One of the present application;

[0025] Figure 5 is a schematic diagram of an electrolyte concentration difference provided by Embodiment One of the present application;

[0026] Figure 6 is a flow chart of a battery life improvement method provided by Embodiment Two of the present application;

[0027] Figure 7 is a schematic diagram of a capacity retention rate provided by Embodiment Two of the present application;

[0028] Figure 8 is a schematic diagram of a voltage change provided by Embodiment Two of the present application;

[0029] Figure 9 is a schematic diagram of a battery structure provided by Embodiment Two of the present application;

[0030] Figure 10 is a structural block diagram of a battery life improvement system provided by Embodiment Three of the present application;

[0031] Figure 11 is a structural block diagram of a battery life improvement device provided by Embodiment Four of the present application;

[0032] Figure 12 is a schematic diagram of a terminal provided by Embodiment Five of the present application. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and not limiting of the present application. In addition, it should be noted that only those parts of the device pertinent to the present application are shown in the drawings for the sake of brevity.

[0034] Embodiment One

[0035] Figure 1This is a flowchart of a method for improving battery life according to Embodiment 1 of the present invention. This embodiment can be applied to improving battery life, etc. The battery life improvement system includes a vibration module and a controller. The vibration module and the controller are electrically connected. The method for improving battery life is executed by the controller, which can be implemented in software and / or hardware. The method specifically includes the following steps:

[0036] Step 110: Obtain the current status and historical charge / discharge data of the target battery.

[0037] The target battery can be a lithium-ion battery. In one embodiment, the current state of the target battery is either active or idle, and the historical charge / discharge data of the target battery includes the depth of charge / discharge, charge / discharge rate, and number of charge / discharge cycles. The battery management system of the target battery contains the current state and historical charge / discharge data of the target battery. The controller in the battery life improvement system is electrically connected to the battery management system to obtain the current state and historical charge / discharge data of the target battery.

[0038] Step 120: Based on the current state and historical charge and discharge data of the target battery, control the vibration module to apply mechanical vibration in a preset direction to the target battery in order to balance the electrolyte concentration gradient of the target battery and improve the life of the target battery.

[0039] Specifically, when the target battery is currently in a static state, and the target battery meets preset conditions based on its historical charge and discharge data, such as completing a high-rate charge and discharge cycle (e.g., 3C rate), the vibration control module applies mechanical vibration to the target battery in a preset direction, such as perpendicular to the electrolyte concentration gradient direction. This causes the electrolyte in the target battery to vibrate along the direction perpendicular to the electrolyte concentration gradient, thereby balancing the electrolyte concentration gradient of the target battery and improving its lifespan.

[0040] Figure 2 This is a schematic diagram of a charging voltage provided in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of a charging current provided in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of an electrolyte concentration provided in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of an electrolyte concentration difference provided in Embodiment 1 of the present invention. (Reference) Figures 2-5, the battery is a square laminated battery with a capacity of 180 Ah, the ambient temperature of charging and discharging is 45℃, the charging and discharging rate is 1C / 1C, the voltage interval is 2.0-3.8V, the battery core is kept upright, and the life cycle of the battery ends after 1000 cycles of charging and discharging. During the charging process of the battery, the voltage increases with the increase of time, the current remains unchanged, the concentration of the positive electrode electrolyte of the battery gradually increases and remains, the concentration of the negative electrode electrolyte of the battery gradually decreases and remains, and the concentration difference between the positive and negative electrode electrolytes also gradually increases and remains. Taking the high-energy-density large-scale lithium-ion battery of a passenger car as an example, due to the difference in electrolyte permeability caused by factors such as porosity and tortuosity of the positive and negative electrodes (generally, the negative electrode has a larger permeability), as well as the high liquid injection amount and low porosity design under the guidance of high energy density, during the charging and discharging cycle of the battery, the graphite volume continuously expands with the increase of lithium intercalation depth during the lithium intercalation process of the negative electrode, causing the porosity filling rate of the battery core, the ratio of the electrolyte volume to the total volume of the electrode sheet porosity, to be greater than 1; and the lithium salt concentration of the electrolyte on the surface of the negative electrode is lower than that of the positive electrode during the charging process, such as Figure 4 The negative electrode has a larger permeability, and the lithium salt-poor electrolyte on the surface of the negative electrode is squeezed out of the core package, resulting in free electrolyte. Taking a wound core used upright as an example, during the charging and discharging cycle, the lithium salt-poor electrolyte is squeezed out from the top and bottom of the core package during charging, and the graphite volume shrinks during discharging, part of the lithium salt-poor electrolyte is absorbed into the edge area of the core package under the action of capillary force, and the remaining electrolyte is retained at the bottom of the core under the influence of gravity, the electrolyte forms a lithium salt concentration gradient on the centimeter scale, and under the charging and discharging cycle condition, the electrolyte concentration gradient cannot be balanced in time, with the charging and discharging cycle, the electrolyte concentration gradient continues to amplify, causing the concentration polarization of the electrochemical reaction in the edge area of the core package to intensify, the overpotential to increase, the side reaction to intensify, and a series of influences such as electrolyte decomposition, ultimately causing the capacity of the core to plummet. By controlling the vibration module to apply a preset direction of mechanical vibration, such as parallel to the electrode reaction interface, to the target battery, the electrolyte concentration gradient is balanced, the capacity of the core is prevented from plummeting, and the battery life is improved.

[0041] The battery life improvement method provided by the embodiment includes: obtaining the current state and historical charging and discharging data of the target battery; and controlling a vibration module to apply a preset direction of mechanical vibration to the target battery according to the current state and historical charging and discharging data of the target battery, so as to balance the electrolyte concentration gradient of the target battery and improve the life of the target battery. The battery life improvement method provided by the embodiment drives the electrolyte convection by controlling the vibration module to apply a preset direction of mechanical vibration, such as parallel to the electrode reaction interface, to the target battery, promotes the balance of the electrolyte concentration in the low-concentration area and the electrolyte concentration in the high-concentration area, balances the electrolyte concentration gradient of the target battery, and improves the battery life.

[0042] Embodiment two

[0043] Figure 6 This is a flowchart of a method for improving battery life according to Embodiment 2 of the present invention. This embodiment can be applied to improving battery life, etc. The battery life improvement system includes a vibration module and a controller. The vibration module and the controller are electrically connected. The method for improving battery life is executed by the controller, which can be implemented in software and / or hardware. The method specifically includes the following steps:

[0044] Step 210: Obtain the current status and historical charge / discharge data of the target battery.

[0045] The target battery can be a lithium-ion battery. In one embodiment, the current state of the target battery is either active or idle, and the historical charge / discharge data of the target battery includes the depth of charge / discharge, charge / discharge rate, and number of charge / discharge cycles. The battery management system of the target battery contains the current state and historical charge / discharge data of the target battery. The controller in the battery life improvement system is electrically connected to the battery management system to obtain the current state and historical charge / discharge data of the target battery.

[0046] Step 220: When the target battery is in a static state, and the target battery meets the preset conditions based on the historical charge and discharge data of the target battery, control the vibration module to apply mechanical vibration in the preset direction to the target battery.

[0047] The preset direction is parallel to the electrode reaction interface of the target battery. The target battery is determined to meet preset conditions based on its historical charge-discharge data, including: when the target battery completes one high-rate charge-discharge cycle, completes one deep charge-discharge cycle, or reaches a preset charge-discharge cycle number, the target battery is determined to meet the preset conditions. At this point, the negative electrode graphite of the battery has completed delithiation, the battery porosity is large, which is beneficial for electrolyte flow.

[0048] In one implementation, the high-rate is greater than or equal to 3C, the deep charge-discharge cycle is greater than or equal to 90% depth, and the preset threshold is 50 or 100. The frequency of the mechanical vibration is 1-50Hz, the amplitude is 0.1-5mm, the duration is 5-30min, and the waveform is a sine wave to avoid the impact effect of square waves or random vibrations. Specifically, if the target battery is currently in a static state (current is zero) and the target battery's charge-discharge cycle reaches the preset threshold, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery. The charge-discharge cycle value is related to the charge-discharge depth, specifically the sum of the depths of each charge-discharge cycle. For example, if the depths of two charges and two discharges are both 50%, then the charge-discharge cycle corresponding to the two charges and two discharges is 1. Taking a lithium-ion battery as an example, by controlling the vibration module to apply low-frequency mechanical vibration perpendicular to the lithium salt concentration gradient and parallel to the electrode reaction interface (for stacked or wound cells used vertically, the vibration direction is parallel to the direction of gravity), the static stratification of the electrolyte is broken by inertial force, inducing shear thinning and macroscopic convection in the electrolyte inside the lithium-ion battery, so as to mix electrolyte regions with different lithium salt concentrations, achieve rapid homogenization of electrolyte concentration in electrolyte regions with different lithium salt concentrations, and balance the electrolyte concentration gradient.

[0049] Step 230: When the vibration module applies mechanical vibration in a preset direction to the target battery for a preset time, control the vibration module to stop working.

[0050] For example, the preset time is 5-30 minutes, and the specific value of the preset time can be adjusted within 5-30 minutes. Figure 7 This is a schematic diagram of capacity retention provided in Embodiment 2 of the present invention. Figure 8 This is a schematic diagram of a voltage change provided in Embodiment 2 of the present invention. (Reference) Figure 7 and Figure 8 The battery's capacity retention rate decreases with increasing charge-discharge cycle count, while the internal resistance growth rate increases, and the voltage decreases. Around 800 charge-discharge cycles, the battery experiences a significant capacity drop, accompanied by a rapid increase in internal resistance and a rapid decrease in voltage. This indicates that the capacity drop is caused by a rapid increase in polarization. Black areas and lithium plating appear at the edges of the negative electrode, especially at the top and bottom, while the interface in the center of the electrode remains intact. This suggests that the capacity loss during charge-discharge cycles is primarily due to failure at the cell edge region. Therefore, rapidly equalizing the macroscopic lithium salt concentration gradient in the electrolyte formed during charge-discharge cycles can prevent capacity drop caused by failure at the cell edge region and effectively extend the battery's cell charge-discharge cycle life.

[0051] Figure 9 This is a schematic diagram of the structure of a battery provided in Embodiment 2 of the present invention. Figure 9 In the diagram, A1, B1, C, B2, and A2 represent aluminum foil, positive electrode coating, electrolyte, negative electrode coating, and copper foil, respectively. During battery charging and discharging, a macroscopic lithium salt concentration gradient forms in the electrolyte parallel to the electrode reaction interface, resulting in lithium-deficient electrolyte in the edge region of the battery cell, accelerating electrode failure in that area. Applying directional low-frequency vibration perpendicular to this concentration gradient can drive electrolyte convection in the vertical direction through shear inertial force, promoting concentration equilibrium between the lithium-deficient and high-concentration regions. A schematic diagram is shown below. Figure 9 As shown, the formula for calculating the magnitude of inertial force is: F max =m×A×(2×π×f) 2 , of which F max Let m be the maximum inertial force, A be the cell mass, and f be the vibration frequency. The vibration wavelength significantly affects convection in porous media. Based on the relative relationship between wavelength and battery characteristic dimensions, two convection modes can be identified: long-wavelength disturbances (wavelengths approaching or exceeding the cell height) induce macroscopic convection, driving the free electrolyte to form cross-regional circulation within the positive and negative electrode fluid layers, promoting the migration of the lithium-poor electrolyte at the top to the high-concentration region in the middle; and short-wavelength disturbances (wavelengths less than the electrode thickness), where energy is mainly dissipated within the porous medium, forming localized micro-convection. This can only balance micrometer-level concentration differences and cannot eliminate centimeter-level macroscopic concentration gradients. The vibration wavelength is determined by the wave velocity and frequency, while the wave velocity is affected by parameters such as electrolyte viscosity and electrode porosity, typically satisfying the following relationship in batteries: Where λ is the vibration wavelength, μ is the electrolyte viscosity, and ε is the electrode porosity of the battery. To maximize the inertial force and vibration wavelength to achieve optimal concentration gradient equalization, a low-frequency vibration is chosen to increase the wavelength. Simultaneously, to increase the inertial force without structural damage, a relatively large amplitude is selected. The specific magnitude of the vibration wavelength can be determined based on the actual battery requirements and is not limited here.

[0052] It should be noted that the range and magnitude of each parameter in this embodiment are only illustrative and can be determined according to the actual needs for improving battery life, and are not limited here.

[0053] The battery life improvement method provided in this embodiment includes: acquiring the current state and historical charge / discharge data of the target battery; when the target battery is in a static state and it is determined from the historical charge / discharge data that the target battery meets preset conditions, controlling a vibration module to apply mechanical vibration in a preset direction to the target battery; and controlling the vibration module to stop working when the vibration module applies mechanical vibration in the preset direction to the target battery for a preset time. The battery life improvement method provided in this embodiment, when the target battery is in a static state and meets preset conditions, drives electrolyte convection by controlling the vibration module to apply mechanical vibration in a preset direction, such as parallel to the electrode reaction interface, to the target battery. This promotes the equilibrium of electrolyte concentration in low-concentration areas and high-concentration areas, thereby balancing the electrolyte concentration gradient of the target battery and improving battery life.

[0054] Example 3

[0055] Figure 10 This is a structural block diagram of a battery life improvement system provided in Embodiment 3 of the present invention. (Reference) Figure 10 The battery life improvement system includes a vibration module 10 and a controller 20. The vibration module 10 and the controller 20 are electrically connected. The battery life improvement method described in any embodiment of the present invention is executed by the controller. The controller can transmit a drive signal to the vibration module 10 to drive the vibration module 10 to vibrate. When the vibration reaches a preset time, the controller smoothly stops the drive signal, and the vibration stops within 1-3 seconds to avoid sudden braking. The controller can record this vibration event. If the vibration occurs after the number of battery charge / discharge cycles has reached a preset threshold, the number of cycles is reset to zero. The specific execution process of the controller can be referred to in any of the above embodiments, and will not be repeated here.

[0056] Optionally, the vibration module 10 can be a motor or actuator.

[0057] For example, the actuator is a linear resonant actuator or a piezoelectric ceramic actuator, and the motor is an eccentric wheel motor. The linear resonant actuator is an electromagnetic vibration device, including an electromagnetic coil, a spring, a vibrating mass, and a guide structure. The electromagnetic coil is wrapped around an iron core and generates a magnetic field when current flows through it. The spring connects the electromagnetic coil and the vibrating mass, providing support and restoring force so that the vibrating mass returns to its initial position after vibration. The vibrating mass is a movable component that generates mechanical vibration under the drive of the current. The guide structure is used to limit the movement trajectory of the vibrating mass, ensuring that it vibrates along a specific linear direction. When current passes through the electromagnetic coil, a magnetic field is generated. This magnetic field interacts with the permanent magnet on the vibrating mass, subjecting the vibrating mass to an electromagnetic force. When the external excitation frequency matches the natural vibration frequency of the vibrating mass, resonance occurs, achieving the maximum amplitude mechanical vibration effect. Changes in the current cause changes in the electromagnetic force, causing the vibrating mass to vibrate linearly under the action of the spring. By controlling the magnitude, frequency, and waveform of the current, different vibration modes and intensities can be achieved. Linear resonant actuators are characterized by high efficiency, low power consumption, and fast response speed, typically 20-30ms, enabling more precise vibration control.

[0058] Piezoelectric ceramic actuators are driving devices that utilize the piezoelectric effect to achieve precise micro-displacement control. Internally, a piezoelectric ceramic is integrated, encapsulated in a metal housing. Typically, the upper end is the moving end for mounting the load, while the lower end has a threaded base for self-fixation. The internal structure varies depending on the type. For example, a ring-shaped piezoelectric ceramic actuator is driven by a stack of ring-shaped piezoelectric ceramics with a central through-hole; a direct-drive mechanism piezoelectric ceramic actuator integrates stacked piezoelectric ceramics and applies preload to the stack through a mechanical housing. Based on the piezoelectric effect, when an electric field is applied to the piezoelectric ceramic, it deforms, thus producing displacement. By controlling the strength and direction of the electric field, the deformation and direction of the piezoelectric ceramic can be precisely controlled, thereby achieving precise control of the actuator's output displacement. Piezoelectric ceramic actuators are classified into high-voltage and low-voltage types according to voltage. High-voltage actuators are typically 500V or 1000V, while low-voltage actuators are generally 150V. Piezoelectric ceramic actuators come in various shapes, including cylindrical and annular. Cylindrical actuators encapsulate a stack of square piezoelectric ceramics internally; annular actuators are driven by a stack of annular piezoelectric ceramics with a central through-hole. Sensors can be configured into piezoelectric ceramic actuators to eliminate hysteresis and creep, improving accuracy and stability. The displacement resolution of piezoelectric ceramic actuators can reach the nanometer level, for example, 0.1 nm. The thrust output can reach the kilonewton level, with stiffness and output density superior to traditional electromagnetic actuators, enabling them to adapt to high-load scenarios. Piezoelectric ceramic actuators have short electromechanical response times, such as as short as 80 ms, and resonant frequencies greater than 125 Hz, supporting real-time vibration control and dynamic compensation. Some piezoelectric ceramic actuators can operate stably in complex media environments such as vacuum, oil, and high humidity.

[0059] An eccentric wheel motor, also known as a vibration motor, is a device that converts electrical energy into mechanical energy and generates vibration through an eccentric wheel. An eccentric wheel motor consists of an electric motor, an eccentric wheel, a fixed shaft, and a housing. The electric motor, such as a DC motor or AC motor, is the power source that provides power for the rotation of the eccentric wheel. The eccentric wheel, usually mounted on the motor's shaft, has its center of gravity offset from the shaft's center and is the key component generating vibration. The fixed shaft supports the eccentric wheel, allowing it to rotate around the shaft. The housing protects and secures the internal components, including the electric motor and eccentric wheel. When the motor is powered on, the shaft drives the eccentric wheel to rotate. Because the eccentric wheel's center of gravity is not on the shaft, centrifugal force is generated during rotation. The direction of this centrifugal force changes continuously with the rotation of the eccentric wheel, thus causing the motor to vibrate. Eccentric wheel motors have a simple structure, low cost, and are easy to manufacture and maintain. They can generate large vibration amplitudes and strong vibration forces. The intensity, frequency, and direction of the vibration can be changed by adjusting parameters such as the position, angle, and mass of the eccentric wheel.

[0060] The specific components used in the vibration module 10 in this embodiment can be determined according to the actual battery requirements, and are not limited here.

[0061] Optionally, the vibration module is fixed to the top and bottom of the target battery.

[0062] Specifically, the vibration module can be rigidly fixed to the top and bottom of the target battery to provide vibration perpendicular to the electrolyte concentration gradient and parallel to the electrode reaction interface, so as to balance the electrolyte concentration gradient and improve battery life.

[0063] The battery life improvement system provided in this embodiment belongs to the same inventive concept as the battery life improvement method provided in any embodiment of the present invention, and has corresponding beneficial effects. For technical details not covered in this embodiment, please refer to the battery life improvement method provided in any embodiment of the present invention.

[0064] Example 4

[0065] Figure 11 This is a structural block diagram of a battery life improvement device provided in Embodiment 4 of the present invention. The battery life improvement device is integrated into the controller of the battery life improvement system; the battery life improvement device includes: a data acquisition module 310 and a vibration control module 320; wherein, the data acquisition module is used to acquire the current state and historical charge and discharge data of the target battery; the vibration control module is used to control the vibration module to apply mechanical vibration in a preset direction to the target battery according to the current state and historical charge and discharge data of the target battery, so as to balance the electrolyte concentration gradient of the target battery and improve the life of the target battery.

[0066] Based on the above implementation, the vibration control module 320 is specifically used to control the vibration module to apply mechanical vibration in a preset direction to the target battery when the target battery is in a static state and the target battery meets the preset conditions based on the historical charge and discharge data of the target battery.

[0067] In one embodiment, the vibration control module 320 is specifically used to determine, based on the historical charge and discharge data of the target battery, that the target battery meets a preset condition when it completes at least one of the following: a high-rate charge and discharge cycle, a deep charge and discharge cycle, or a charge and discharge cycle period reaching a preset threshold. The high-rate charge and discharge cycle is defined as a charge and discharge cycle with a depth greater than or equal to 3C; the deep charge and discharge cycle is defined as a charge and discharge cycle with a depth greater than or equal to 90%; and the preset threshold is 50 or 100.

[0068] Optionally, the vibration control module 320 is also used to control the vibration module to stop working when the vibration module applies mechanical vibration in a preset direction to the target battery for a preset time.

[0069] The battery life improvement device provided in this embodiment belongs to the same inventive concept as the battery life improvement method provided in any embodiment of the present invention, and has corresponding beneficial effects. For technical details not covered in this embodiment, please refer to the battery life improvement method provided in any embodiment of the present invention.

[0070] Example 5

[0071] Figure 12 This is a schematic diagram of the structure of a terminal provided in Embodiment 5 of the present invention. Figure 12 A block diagram of an exemplary device 412 suitable for implementing embodiments of the present invention is shown. Figure 12 The device 412 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0072] like Figure 12 As shown, device 412 is represented as a general-purpose device. Components of device 412 may include, but are not limited to: one or more processors 416, storage device 428, and bus 418 connecting different system components (including storage device 428 and processor 416).

[0073] Bus 418 represents one or more of several bus architectures, including a memory device bus or memory device controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. Examples of these architectures include, but are not limited to, the Industry Subversive Alliance (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0074] Device 412 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by device 412, including volatile and non-volatile media, removable and non-removable media.

[0075] Storage device 428 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 430 and / or cache memory 432. Device 412 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 434 may be used to read and write non-removable, non-volatile magnetic media (… Figure 12 Not shown; usually referred to as a "hard drive"). Although Figure 12 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disc drive for reading and writing to a removable non-volatile optical disc, such as a Compact Disc Read-Only Memory (CD-ROM), a Digital Video Disc Read-Only Memory (DVD-ROM), or other optical media. In these cases, each drive may be connected to bus 418 via one or more data media interfaces. Storage device 428 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0076] A program / utility 440 having a set (at least one) of program modules 442 may be stored in, for example, a storage device 428. Such program modules 442 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 442 typically perform the functions and / or methods described in the embodiments of the present invention.

[0077] Device 412 can also communicate with one or more external devices 414 (e.g., keyboard, pointing terminal, display 424, etc.), and with one or more terminals that enable a user to interact with device 412, and / or with any terminal that enables device 412 to communicate with one or more other computing terminals (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 422. Furthermore, device 412 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 420. Figure 12As shown, network adapter 420 communicates with other modules of device 412 via bus 418. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with device 412, including but not limited to: microcode, terminal drivers, redundant processors, external disk drive arrays, Redundant Arrays of Independent Disks (RAID) systems, tape drives, and data backup storage systems.

[0078] The processor 416 executes various functional applications and data processing by running programs stored in the storage device 428 (the processor 416 can be considered as a controller in a battery life improvement system), and performs, for example, the battery life improvement method provided in the embodiments of the present invention, which includes:

[0079] Obtain the current status and historical charge / discharge data of the target battery;

[0080] Based on the current state and historical charge / discharge data of the target battery, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery in order to balance the electrolyte concentration gradient of the target battery and improve the battery life.

[0081] Example 6

[0082] Embodiment 6 of the present invention provides a computer-readable storage medium having a computer program stored thereon. When executed by a controller, the program implements the battery life improvement method provided in the embodiments of the present invention, the method comprising:

[0083] Obtain the current status and historical charge / discharge data of the target battery;

[0084] Based on the current state and historical charge / discharge data of the target battery, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery in order to balance the electrolyte concentration gradient of the target battery and improve the battery life.

[0085] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0086] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0087] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0088] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or terminal. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0089] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, rearrangements, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for improving battery life, characterized in that, The battery life improvement system includes a vibration module and a controller, the vibration module being electrically connected to the controller, and the battery life improvement method being executed by the controller; the battery life improvement method includes: Obtain the current status and historical charge / discharge data of the target battery; Based on the current state and historical charge / discharge data of the target battery, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery in order to balance the electrolyte concentration gradient of the target battery and improve the lifespan of the target battery.

2. The method for improving battery life according to claim 1, characterized in that, The step of controlling the vibration module to apply mechanical vibration in a preset direction to the target battery based on the current state of the target battery includes: When the target battery is in a static state, and the target battery meets the preset conditions based on the historical charge and discharge data of the target battery, the vibration module is controlled to apply mechanical vibration in a preset direction to the target battery.

3. The method for improving battery life according to claim 2, characterized in that, The step of determining that the target battery meets the preset conditions based on the historical charge and discharge data of the target battery includes: Based on the historical charge and discharge data of the target battery, it is determined that the target battery meets the preset conditions when it completes at least one of the following: a high-rate charge and discharge cycle, a deep charge and discharge cycle, or a charge and discharge cycle period reaches a preset threshold.

4. The method for improving battery life according to claim 3, characterized in that, The high rate is a rate greater than or equal to 3C, the deep charge-discharge cycle is a charge-discharge cycle greater than or equal to 90% depth, and the preset threshold is 50 or 100.

5. The method for improving battery life according to any one of claims 1-4, characterized in that, The method of controlling the vibration module to apply mechanical vibration in a preset direction to the target battery includes: When the vibration module applies mechanical vibration in a preset direction to the target battery for a preset time, the vibration module is controlled to stop working.

6. The method for improving battery life according to any one of claims 1-4, characterized in that, The frequency of the mechanical vibration is 1-50Hz, the amplitude is 0.1-5mm, the duration is 5-30min, and the waveform is a sine wave.

7. The method for improving battery life according to any one of claims 1-4, characterized in that, The preset direction is parallel to the electrode reaction interface of the target battery.

8. A system for improving battery life, characterized in that, include: A vibration module and a controller, wherein the vibration module is electrically connected to the controller, and the method for improving battery life as described in any one of claims 1-7 is executed by the controller.

9. The battery life improvement system according to claim 8, characterized in that, The vibration module is a motor or actuator.

10. The battery life improvement system according to claim 8 or 9, characterized in that, The vibration module is fixed to the top and bottom of the target battery.

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