Lithium battery charging control method and device, electronic equipment and storage medium

Abstract

The application discloses a lithium battery charging control method, which comprises the following steps: obtaining the battery health degree of a lithium battery pack when the lithium battery pack is in a battery recharging state during the driving of a target electric vehicle, the lithium battery pack being arranged in the target electric vehicle; obtaining the current cell temperature of the lithium battery pack when the battery health degree is less than a set health degree; recharging the lithium battery pack by using a pulse charging mode when the current cell temperature is detected to be within a preset temperature range; and controlling the charging parameter in the recharging process by using the pulse charging mode to be a target charging parameter according to the battery health degree. The lithium battery charging control method, electronic equipment and storage medium disclosed by the application can effectively reduce lithium dendrites in the lithium battery, thereby improving the charging and discharging performance and service life of the lithium battery.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a control method, electronic device, and storage medium for charging lithium batteries. Background Technology

[0002] With the rapid development of new energy technologies, power batteries, especially lithium batteries, have become more widely used. Power batteries are cyclically used, but during this process, lithium plating can occur in the battery cells. This plating leads to the formation of lithium dendrites inside the battery. These dendrites extensively cover the electrode surface, significantly reducing the cell's electrochemical performance, including capacity decay, slower charging speed, and increased internal resistance. In severe cases, they can puncture the separator, causing internal short circuits or even battery explosions. Therefore, a method to reduce lithium dendrite formation in power batteries is urgently needed. Summary of the Invention

[0003] This invention provides a lithium battery charging control method, electronic device, and storage medium, which can effectively reduce lithium dendrites in lithium batteries, thereby improving the charging and discharging performance and service life of lithium batteries.

[0004] The first aspect of this invention provides a control method for charging a lithium battery, the method comprising:

[0005] When the lithium battery pack is in a battery recharge state during the operation of the target electric vehicle, the battery health of the lithium battery pack is obtained, and the lithium battery pack is installed in the target electric vehicle.

[0006] When the battery health level is lower than a set health level, the current cell temperature of the lithium battery pack is obtained;

[0007] When the current cell temperature is detected to be within a preset temperature range, the lithium battery pack is recharged using a pulse charging method.

[0008] Based on the battery health status, the charging parameters during the recharge process using the pulse charging method are controlled to be the target charging parameters.

[0009] Optionally, obtaining the battery health status of the lithium battery pack includes:

[0010] Obtain the current available capacity and the set standard capacity of the lithium battery pack;

[0011] The battery health is obtained based on the current available capacity and the set standard capacity.

[0012] Optionally, controlling the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status includes:

[0013] When the battery health is within a first preset health range, during the recharge process using the pulse charging method, the pulse charging current density of the lithium battery is controlled to be a first preset density and the charging cycle time is controlled to be a first preset time, and the cell temperature of the lithium battery is within a first sub-temperature range of the preset temperature range, wherein the charging parameters include pulse charging current density, charging cycle time and cell temperature.

[0014] Optionally, controlling the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status includes:

[0015] When the battery health is within the second preset health range, during the recharge process using the pulse charging method, the pulse charging current density of the lithium battery is controlled to be the second preset density and the charging cycle time is controlled to be the second preset time, and the cell temperature of the lithium battery is within the second sub-temperature range of the preset temperature range, wherein the second preset density is greater than the first preset density, the second preset time is greater than the first preset time, and the minimum temperature within the second sub-temperature range is not less than the maximum temperature within the first sub-temperature range.

[0016] Optionally, after obtaining the current cell temperature of the lithium battery pack, the method includes:

[0017] If the current cell temperature is lower than the first set temperature, the lithium battery pack is controlled to remain in the battery recharge state, and the lithium battery pack is heated. The first set temperature is not greater than the minimum temperature of the preset temperature range.

[0018] Optionally, after obtaining the current cell temperature of the lithium battery pack, the method includes:

[0019] If the current cell temperature is greater than the second set temperature, the lithium battery pack is controlled to remain in the battery recharge state, and the lithium battery pack is cooled. The second set temperature is not less than the maximum temperature of the preset temperature range.

[0020] Optionally, after heating the lithium battery pack and after cooling the lithium battery pack, the method further includes:

[0021] Real-time monitoring of the actual cell temperature of the lithium battery pack;

[0022] If the actual cell temperature of the lithium battery pack is detected to be within the preset temperature range, the step of recharging the lithium battery pack using pulse charging is executed.

[0023] A second aspect of the present invention also provides a control device for charging a lithium battery, the device comprising:

[0024] A battery health acquisition unit is used to acquire the battery health of the lithium battery pack when the lithium battery pack is in a battery recharge state during the operation of the target electric vehicle, wherein the lithium battery pack is installed in the target electric vehicle;

[0025] A cell temperature acquisition unit is used to acquire the current cell temperature of the lithium battery pack when the battery health is less than a set health level.

[0026] The charging status adjustment unit is used to recharge the lithium battery pack using a pulse charging method when the current cell temperature is detected to be within a preset temperature range.

[0027] The charging control unit is used to control the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status.

[0028] A third aspect of the present invention provides an electronic device, including a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors, the one or more programs containing operation instructions for performing a control method for charging a lithium battery as provided in the first aspect.

[0029] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps corresponding to the lithium battery charging control method provided in the first aspect.

[0030] The above-described one or more technical solutions in the embodiments of this application have at least the following technical effects:

[0031] Based on the above technical solution, when the lithium battery pack is in a recharge state during the operation of the target electric vehicle, the battery health of the lithium battery pack is obtained. When the battery health is less than a set health level and the current cell temperature of the lithium battery pack is within a preset temperature range, the lithium battery pack is recharged using a pulse charging method. Therefore, when the battery health is less than the set health level and the current cell temperature is within the preset temperature range, the lithium battery pack is controlled to be in a pulse charging state. Pulse charging can suppress approximately 96% of lithium dendrite growth and eliminate existing lithium dendrites in the lithium battery pack. Furthermore, the charging parameters during the recharge process using the pulse charging method are controlled to be target charging parameters. These target charging parameters can control the current density during pulse charging to be under low current density conditions, allowing lithium to deposit stably and further suppressing lithium dendrite growth. This effectively reduces lithium dendrites in the lithium battery, thereby improving the charge / discharge performance and lifespan of the lithium battery. Attached Figure Description

[0032] Figure 1 A schematic flowchart illustrating the lithium battery charging control method provided in the embodiments of this application;

[0033] Figure 2 A block diagram of a control device for charging a lithium battery provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0035] The main implementation principles, specific implementation methods, and corresponding beneficial effects of the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] Example

[0037] Please refer to Figure 1 This application provides a method for controlling lithium battery charging, the method comprising:

[0038] S101. When the lithium battery pack is in a battery recharge state during the operation of the target electric vehicle, the battery health of the lithium battery pack is obtained, and the lithium battery pack is installed in the target electric vehicle.

[0039] S102. When the battery health is less than a set health level, obtain the current cell temperature of the lithium battery pack.

[0040] S103. When the current cell temperature is detected to be within the preset temperature range, the lithium battery pack is recharged using a pulse charging method.

[0041] S104. Based on the battery health status, control the charging parameters during the recharge process using the pulse charging method to the target charging parameters.

[0042] The lithium battery charging control method described in the embodiments of this specification is typically used in a battery management system (BMS); furthermore, the target electric vehicle can be a hybrid electric vehicle or a pure electric vehicle, etc.

[0043] Before executing step S101, it can first detect whether the target electric vehicle is in motion. After detecting that the target electric vehicle is in motion, it can continue to detect whether the lithium battery pack of the target electric vehicle is in the battery recharge state. If it is detected that the target electric vehicle is in motion and the lithium battery pack is in the battery recharge state, then step S101 is executed to obtain the battery health of the lithium battery pack.

[0044] When obtaining the battery health status of a lithium battery pack, the current available capacity and the set standard capacity can be obtained. Then, based on the current available capacity and the set standard capacity, the battery health status can be obtained. At this time, the battery health status can be the ratio of the current available capacity to the set standard capacity, or it can be the product of the ratio and a weight. The following example uses the product of the ratio and the weight as a specific case.

[0045] Furthermore, when obtaining the battery health status of a lithium battery pack, the SOH of the lithium battery pack at room temperature can be monitored using BSM as a measure of the battery health status.

[0046] If battery health is represented by SOH, and current usable capacity is represented by Q. now Set the standard capacity using Q. new And with a weight of 100%, then

[0047] After obtaining the battery health status, before executing step S102, it is necessary to determine whether the battery health status is less than the set health status. If it is less than the set health status, then step S102 is executed; if it is not less than the set health status, then no operation is required.

[0048] The health level can be set according to actual needs, or it can be set manually or by the equipment itself. For example, the health level can be set to a value of 85%, 90%, or 92%, which is not less than 80%. Of course, the health level can also be set to a value less than 80%, and this manual does not impose specific restrictions.

[0049] In step S102, when the battery health is less than the set health level, the current cell temperature of the lithium battery pack can be monitored by the BMS and can be represented by T.

[0050] For example, taking electric vehicle A as the target vehicle, when electric vehicle A is traveling downhill, the displacement sensor in electric vehicle A can determine that electric vehicle A is in motion. Then, the BMS can detect whether the lithium battery pack of electric vehicle A is recharging. If the lithium battery pack is detected to be recharging, it is determined that the lithium battery pack is in the recharging state. In this way, the BMS monitors the SOH of the lithium battery pack. If the health level is set to 90%, it is determined whether the SOH is less than 90%. If the SOH is 85% < 90%, the current cell temperature of the lithium battery pack is obtained through the BMS.

[0051] Furthermore, after obtaining the current cell temperature, it is determined whether the current cell temperature is within the preset temperature range. If it is, step S103 is executed; if it is not, it is determined whether the current cell temperature is lower than the first preset temperature and whether the current cell temperature is higher than the second preset temperature.

[0052] The preset temperature range can be set based on the normal operating temperature of the lithium battery pack, or it can be set manually or by equipment. Examples of preset temperature ranges include 40℃~60℃, 38℃~62℃, 42℃~57℃, and 44℃~64℃. Preferably, the preset temperature range is 40℃~60℃. This preset temperature range does not include both extreme values; for example, a preset temperature range of 40℃~60℃ means the range is greater than 40℃ and less than 60℃. The following example uses a preset temperature range of 40℃~60℃.

[0053] In step S103, if the current cell temperature is detected to be within a preset temperature range, the lithium battery pack is recharged using a pulse charging method, thus adjusting the recharge mode of the lithium battery pack to pulse charging. When the lithium battery pack is in recharge mode, it is typically recharged using either constant voltage or constant current charging. However, when the battery health is detected to be lower than a set health level and the current cell temperature is within the preset temperature range, the recharge mode of the lithium battery pack is adjusted to pulse charging. At this time, when the battery health is lower than the set health level, lithium dendrites may be present in the lithium battery pack. Furthermore, when the current cell temperature is within the preset temperature range (which is based on the normal operating temperature of the lithium battery pack), pulse charging effectively avoids the probability of overheating leading to malfunctions such as explosions and fires, ensuring charging safety when using pulse charging.

[0054] For example, taking electric vehicle A as the target vehicle, when electric vehicle A is driving downhill and the lithium battery pack is in the battery recharge state, the BMS monitors that the SOH of the lithium battery pack is 85%. If the health level is set to 90%, since 85% < 90%, the BMS obtains the current cell temperature T of the lithium battery pack. If it is determined that 40℃ < T < 60℃, the battery recharge mode of the lithium battery pack is adjusted to pulse charging mode.

[0055] Because pulse charging can suppress approximately 96% of lithium dendrite growth and eliminate existing lithium dendrites in lithium battery packs, it can effectively reduce lithium dendrites in lithium batteries, thereby improving the charge / discharge performance and lifespan of lithium batteries.

[0056] During the recharging of the lithium battery pack using pulse charging, step S104 also needs to be executed.

[0057] In step S104, during the recharge process of the lithium battery pack using pulse charging, it can be determined whether the battery health is within a first preset health range or a second preset health range. When the battery health is within the first preset health range, during the recharge process using pulse charging, the pulse charging current density of the lithium battery is controlled to a first set density, the charging cycle time is controlled to a first set time, and the cell temperature of the lithium battery is controlled to be within a first sub-temperature range of a preset temperature range. The charging parameters include the pulse charging current density, the charging cycle time, and the cell temperature. When the battery health is within the second preset health range, during the recharge process using pulse charging, the pulse charging current density of the lithium battery is controlled to a second set density, the charging cycle time is controlled to a second set time, and the cell temperature of the lithium battery is controlled to be within a second sub-temperature range of a preset temperature range. The second set density is greater than the first set density, the second set time is greater than the first set time, and the minimum temperature within the second sub-temperature range is not less than the maximum temperature within the first sub-temperature range.

[0058] The first and second preset health ranges can be set according to actual needs. The maximum values ​​of both ranges are not greater than the set health level, and the maximum health level in the first preset range is greater than the maximum health level in the second preset range. Preferably, the minimum health level in the first preset range is not less than the maximum health level in the second preset range. Of course, the maximum health level in the second preset range can also be greater than the minimum health level in the first preset range. For example, the first preset health range can be [78%, 88%), [80%, 90%), and [82%, 90%), etc., and the second preset health range can be [70%, 78%), [70%, 80%), and [70%, 82%). [80%, 90%) refers to a first preset health range that is less than 90% and not less than 80%. Other value ranges are described above. The following example uses a first preset health range of [80%, 90%) and a second preset health range of [70%, 80%).

[0059] Furthermore, both the first and second set times can be set according to actual needs, or can be set manually or by equipment; and the first and second set densities can also be set according to actual needs, or can be set manually or by equipment.

[0060] In one embodiment, the first sub-temperature range may be, for example, (40°C, 50°C], (40°C, 52°C], (38°C, 52°C], etc.; the second sub-temperature range may be, for example, (50°C, 60°C), (52°C, 60°C), and [52°C, 64°C), etc. Of course, the minimum temperature in the second sub-temperature range may also be less than the maximum temperature in the first sub-temperature range. For example, when the first sub-temperature range is (40°C, 52°C], the second sub-temperature range may be (50°C, 60°C), etc. This specification does not impose specific limitations.

[0061] In another embodiment, the charging parameters may further include pulse duration, which is the duration of a charging sequence and can be set according to actual needs. For example, the pulse period could be 10s, 20s, or 30s.

[0062] During the recharge process of the lithium battery pack using pulse charging, if 80% ≤ SOH < 90%, the pulse charging current density of the lithium battery pack is controlled as the first pulse charging current density J1 (A / cm2), the pulse period is 10s or 30s, the charging cycle time is the first set time T1 (s), and the cell temperature is controlled within (40℃, 50℃); if 70% ≤ SOH < 80%, the pulse charging current density of the lithium battery pack is controlled as the second pulse charging current density J2 (A / cm2), the pulse period is 10s or 30s, the charging cycle time is the second set time T2 (s), and the cell temperature is controlled within (50℃, 60℃).

[0063] Where J2 > J1 and T2 > T1, J1 can be 0.05C, J2 can be 0.1C, T1 can be 600s, and T2 can be 1200s; furthermore, J1 and J2 can be calculated by dividing the cell charging and discharging current by the area of ​​the active material of the cell electrode.

[0064] In another embodiment, after obtaining the current cell temperature of the lithium battery pack, it is determined whether the current cell temperature is lower than a first set temperature and whether the current cell temperature is higher than a second set temperature. If it is determined that the current cell temperature is lower than the first set temperature, the lithium battery pack is controlled to remain in the battery recharge state, and the lithium battery pack is heated, wherein the first set temperature is not higher than the minimum temperature of a preset temperature range; and if it is determined that the current cell temperature is higher than the second set temperature, the lithium battery pack is controlled to remain in the battery recharge state, and the lithium battery pack is cooled, wherein the second set temperature is not lower than the maximum temperature of a preset temperature range.

[0065] The first set temperature can be set according to actual needs, or it can be set manually or by the equipment. If the preset temperature range is 40℃ to 60℃, the first set temperature can be no greater than 40℃, for example, it can be 35℃, 38℃, or 40℃. The second set temperature can be set according to actual needs, or it can be set manually or by the equipment. If the preset temperature range is 40℃ to 60℃, the second set temperature can be no less than 60℃, for example, it can be 60℃, 64℃, or 70℃. The following example uses a first set temperature of 40℃ and a second set temperature of 60℃.

[0066] Specifically, when heating a lithium battery pack, a low-density current can be used to charge the lithium battery pack and start the heating system to heat the cells of the lithium battery pack. At the same time, a high-frequency charging and discharging system can be started to allow the cells to heat themselves. The low-density current can be, for example, 0.5C.

[0067] Furthermore, when cooling the lithium battery pack, the liquid cooling system of the target electric vehicle can be activated to cool the lithium battery pack and reduce the temperature of the battery cells.

[0068] In one embodiment, after heating the lithium battery pack and after cooling the lithium battery pack, the actual cell temperature of the lithium battery pack is monitored in real time; if the actual cell temperature of the lithium battery pack is within a preset temperature range, steps S103 and S104 are executed.

[0069] In practical applications, when the target trolley is in the recharging phase during operation, the BMS control flow and logic strategy are as follows:

[0070] Step A1: When the BMS detects that the battery SOH ≥ 90%, the battery self-healing system will not be activated;

[0071] Step A2: When the BMS detects that the SOH of the battery is less than 90% at room temperature, the electric vehicle BMS activates the lithium battery self-healing system.

[0072] Step A21: When the BMS detects that the cell temperature T≤40℃, charge with a set low density current. At this time, start the heating system to heat the cell and start the high frequency charge and discharge system to let the cell heat itself. When the cell temperature 40℃<T<60℃, adjust the battery recharge mode to pulse charging mode and adjust the current density to achieve the effect of eliminating lithium dendrites.

[0073] The operating strategy of the lithium battery self-healing system during the recharge phase is as follows:

[0074] Operating condition 1: When 80%≤SOH<90%, the pulse charging current density is J1 (A / cm2), the pulse time is 10s / 30s, the charging cycle time is T1 (s), and the cell temperature is controlled to 40~50℃;

[0075] Operating Condition 2: When 70%≤SOH<80%, the pulse charging current density is J2 (A / cm2), the pulse time is 10s / 30s, the charging cycle time is T2 (s), and the cell temperature is controlled to 50~60℃, where J2>J1 and T2>T1.

[0076] At this point, the actual SOH of the lithium battery pack can be used to provide feedback on the lithium dendrite elimination effect. When the actual SOH increases, it can be assumed that the lithium dendrites inside the lithium battery pack are decreasing.

[0077] As can be seen from the above, since both J2 and J1 are low current densities, lithium can be deposited stably under low current density conditions, further suppressing the growth of lithium dendrites. This can effectively reduce lithium dendrites in lithium batteries, thereby improving the charge and discharge performance and lifespan of lithium batteries. Moreover, pulse charging with different current densities at different temperatures can eliminate lithium dendrites inside the battery, enabling the battery to achieve a self-healing effect, improving battery performance, extending battery lifespan, and enhancing battery safety.

[0078] The above-described one or more technical solutions in the embodiments of this application have at least the following technical effects:

[0079] Based on the above technical solution, when the lithium battery pack is in a recharge state during the operation of the target electric vehicle, the battery health of the lithium battery pack is obtained. When the battery health is less than a set health level and the current cell temperature of the lithium battery pack is within a preset temperature range, the lithium battery pack is recharged using a pulse charging method. Therefore, when the battery health is less than the set health level and the current cell temperature is within the preset temperature range, the lithium battery pack is controlled to be in a pulse charging state. Pulse charging can suppress approximately 96% of lithium dendrite growth and eliminate existing lithium dendrites in the lithium battery pack. Furthermore, the charging parameters during the recharge process using the pulse charging method are controlled to be target charging parameters. These target charging parameters can control the current density during pulse charging to be under low current density conditions, allowing lithium to deposit stably and further suppressing lithium dendrite growth. This effectively reduces lithium dendrites in the lithium battery, thereby improving the charge / discharge performance and lifespan of the lithium battery.

[0080] In accordance with the above embodiments, a control method for charging a lithium battery is provided. This application also provides a corresponding control device for charging a lithium battery. Please refer to... Figure 2 The device includes:

[0081] The battery health acquisition unit 201 is used to acquire the battery health of the lithium battery pack when the lithium battery pack is in the battery recharge state during the operation of the target electric vehicle. The lithium battery pack is installed in the target electric vehicle.

[0082] The cell temperature acquisition unit 202 is used to acquire the current cell temperature of the lithium battery pack when the battery health is less than a set health level.

[0083] The charging status adjustment unit 203 is used to recharge the lithium battery pack using a pulse charging method when the current cell temperature is detected to be within a preset temperature range.

[0084] The charging control unit 204 is used to control the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status.

[0085] In one optional embodiment, the battery health acquisition unit 201 is used to acquire the current available capacity and the set standard capacity of the lithium battery pack; and to acquire the battery health based on the current available capacity and the set standard capacity.

[0086] In one optional embodiment, the charging control unit 204 is configured to, when the battery health is within a first preset health range, during the recharge process using the pulse charging method, control the pulse charging current density of the lithium battery to a first preset density and the charging cycle time to a first preset time, and the cell temperature of the lithium battery to be within a first sub-temperature range of the preset temperature range, wherein the charging parameters include the pulse charging current density, the charging cycle time, and the cell temperature.

[0087] In one optional embodiment, the charging control unit 204 is configured to, when the battery health is within a second preset health range, during the recharge process using the pulse charging method, control the pulse charging current density of the lithium battery to a second preset density and the charging cycle time to a second preset time, and the cell temperature of the lithium battery to be within a second sub-temperature range of the preset temperature range, wherein the second preset density is greater than the first preset density, the second preset time is greater than the first preset time, and the minimum temperature within the second sub-temperature range is not less than the maximum temperature within the first sub-temperature range.

[0088] In one alternative implementation, it further includes:

[0089] A cell heating unit is used to control the lithium battery pack to remain in the battery recharge state and perform heating treatment on the lithium battery pack if the current cell temperature is less than a first set temperature after obtaining the current cell temperature of the lithium battery pack. The first set temperature is not greater than the minimum temperature of the preset temperature range.

[0090] In one alternative implementation, it further includes:

[0091] A cell cooling unit is used to, after obtaining the current cell temperature of the lithium battery pack, if the current cell temperature is greater than a second set temperature, control the lithium battery pack to remain in the battery recharge state and perform cooling treatment on the lithium battery pack, wherein the second set temperature is not less than the maximum temperature of the preset temperature range.

[0092] In one alternative implementation,

[0093] A cell temperature monitoring unit is used to monitor the actual cell temperature of the lithium battery pack in real time after the lithium battery pack is heated and after the lithium battery pack is cooled.

[0094] The control unit is used to perform a step of recharging the lithium battery pack using a pulse charging method when the actual cell temperature of the lithium battery pack is detected to be within the preset temperature range.

[0095] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0096] Figure 3 This is a block diagram illustrating an electronic device 800 for a control method of charging a lithium battery according to an exemplary embodiment. For example, the electronic device 800 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0097] Reference Figure 3 The electronic device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / display (I / O) interface 812, a sensor component 814, and a communication component 816.

[0098] Processing component 802 typically controls the overall operation of electronic device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0099] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of this data include instructions for any application or method operating on electronic device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0100] Power supply component 806 provides power to various components of electronic device 800. Power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 800.

[0101] Multimedia component 808 includes a screen that provides a display interface between the electronic device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0102] Audio component 810 is configured to display and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when electronic device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for displaying audio signals.

[0103] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0104] Sensor assembly 814 includes one or more sensors for providing state assessments of various aspects of electronic device 800. For example, sensor assembly 814 may detect the on / off state of device 800, the relative positioning of components such as the display and keypad of electronic device 800, changes in position of electronic device 800 or a component of electronic device 800, the presence or absence of user contact with electronic device 800, orientation or acceleration / deceleration of electronic device 800, and temperature changes of electronic device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0105] Communication component 816 is configured to facilitate wired or wireless communication between electronic device 800 and other devices. Electronic device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0106] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0107] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of an electronic device 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0108] Other embodiments of the invention 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 the invention that follow the general principles of the invention 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 the invention are indicated by the following claims.

[0109] It should be understood that the present invention 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 the invention is limited only by the appended claims.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the charging of a lithium battery, characterized in that, The method includes: When the lithium battery pack is in a battery recharge state during the operation of the target electric vehicle, the battery health of the lithium battery pack is obtained, and the lithium battery pack is installed in the target electric vehicle. When the battery health level is lower than a set health level, the current cell temperature of the lithium battery pack is obtained; When the current cell temperature is detected to be within a preset temperature range, the lithium battery pack is recharged using a pulse charging method. Based on the battery health status, the charging parameters during the recharge process using the pulse charging method are controlled as the target charging parameters. The step of controlling the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status includes: When the battery health is within a first preset health range, during the recharge process using the pulse charging method, the pulse charging current density of the lithium battery is controlled to be a first preset density and the charging cycle time is controlled to be a first preset time, and the cell temperature of the lithium battery is within a first sub-temperature range of the preset temperature range. The charging parameters include the pulse charging current density, the charging cycle time, and the cell temperature. The pulse charging current density is calculated by dividing the cell charging and discharging current by the area of ​​the active material of the cell electrode.

2. The control method as described in claim 1, characterized in that, The process of obtaining the battery health status of the lithium battery pack includes: Obtain the current available capacity and the set standard capacity of the lithium battery pack; The battery health is obtained based on the current available capacity and the set standard capacity.

3. The control method as described in claim 1, characterized in that, The step of controlling the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status includes: When the battery health is within the second preset health range, during the recharge process using the pulse charging method, the pulse charging current density of the lithium battery is controlled to be the second preset density and the charging cycle time is controlled to be the second preset time, and the cell temperature of the lithium battery is within the second sub-temperature range of the preset temperature range, wherein the second preset density is greater than the first preset density, the second preset time is greater than the first preset time, and the minimum temperature within the second sub-temperature range is not less than the maximum temperature within the first sub-temperature range.

4. The control method as described in claim 1, characterized in that, After obtaining the current cell temperature of the lithium battery pack, the method includes: If the current cell temperature is lower than the first set temperature, the lithium battery pack is controlled to remain in the battery recharge state, and the lithium battery pack is heated. The first set temperature is not greater than the minimum temperature of the preset temperature range.

5. The control method as described in claim 4, characterized in that, After obtaining the current cell temperature of the lithium battery pack, the method includes: If the current cell temperature is greater than the second set temperature, the lithium battery pack is controlled to remain in the battery recharge state, and the lithium battery pack is cooled. The second set temperature is not less than the maximum temperature of the preset temperature range.

6. The control method as described in claim 5, characterized in that, After heating the lithium battery pack and after cooling the lithium battery pack, the method further includes: Real-time monitoring of the actual cell temperature of the lithium battery pack; If the actual cell temperature of the lithium battery pack is detected to be within the preset temperature range, the step of recharging the lithium battery pack using pulse charging is executed.

7. A control device for charging a lithium battery, characterized in that, The device includes: A battery health acquisition unit is used to acquire the battery health of the lithium battery pack when the lithium battery pack is in a battery recharge state during the operation of the target electric vehicle, wherein the lithium battery pack is installed in the target electric vehicle; A cell temperature acquisition unit is used to acquire the current cell temperature of the lithium battery pack when the battery health is less than a set health level. The charging status adjustment unit is used to recharge the lithium battery pack using a pulse charging method when the current cell temperature is detected to be within a preset temperature range. The charging control unit is used to control the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status. The step of controlling the charging parameters during the recharge process using the pulse charging method to the target charging parameters based on the battery health status includes: When the battery health is within a first preset health range, during the recharge process using the pulse charging method, the pulse charging current density of the lithium battery is controlled to be a first preset density and the charging cycle time is controlled to be a first preset time, and the cell temperature of the lithium battery is within a first sub-temperature range of the preset temperature range. The charging parameters include the pulse charging current density, the charging cycle time, and the cell temperature. The pulse charging current density is calculated by dividing the cell charging and discharging current by the area of ​​the active material of the cell electrode.

8. An electronic device, characterized in that, It includes a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors, containing operation instructions for performing the control methods as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps corresponding to the control method as described in any one of claims 1 to 6.

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