Method for prolonging cycle life of lithium battery at high temperature

Abstract

The invention relates to the technical field of cycle life, and discloses a method for prolonging the cycle life of a lithium battery at high temperature, comprising the following steps: S1, single-chip microcomputer detection: a single-chip microcomputer is responsible for detecting the ambient temperature, the percentage of the residual capacity of the battery and the access condition of a power adapter; s2, starting a protection mechanism: when the environment temperature is detected to reach 55 DEG C, the residual capacity of the battery is greater than 50% SOC and a power adapter is connected, starting the battery protection mechanism by the single chip microcomputer, preferentially using the battery to supply power and stopping charging the power adapter; and S3, dynamic adjustment: in the battery protection mode, the single-chip microcomputer dynamically adjusts charging and discharging of the battery, so that the residual capacity of the battery is kept between 20% SOC and 50% SOC, the attenuation of the battery is reduced, and the cycle life is prolonged. According to the method for prolonging the cycle life of the lithium battery at the high temperature, the cycle life of the battery is prolonged; the equipment adaptability is improved; the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of cycle life, and in particular to a method for increasing the cycle life of a lithium battery at high temperature. Background Art

[0002] As an important form of energy conversion in chemical power sources, lithium batteries have developed rapidly since their introduction due to their high operating voltage, high energy density, light weight, small size, good safety, excellent cycle life and environmental protection characteristics, and are widely used in mobile electronic devices, communications, energy storage, military, field operations, instrumentation, aerospace and other fields. However, with the continuous expansion of application fields, the performance requirements for lithium batteries are also getting higher and higher, especially the improvement of cycle life has become the focus of industry attention.

[0003] In high temperature environments, the cycle life of lithium batteries is significantly affected. Studies have shown that under high temperature conditions of 55 degrees Celsius, as the battery state of charge (SOC) increases, the cycle life decay of lithium batteries will be significantly aggravated. This phenomenon is particularly prominent in embedded electronic products, because these products often need to work in various complex environments, and most embedded products do not take special battery protection measures in high temperature environments. When these devices are connected to a power adapter, the battery is still charged even in a high temperature environment, which greatly shortens the battery cycle life.

[0004] The prior art has the following disadvantages: Lack of battery protection in high temperature environments: Most embedded electronic products do not implement effective battery protection strategies in high temperature environments, resulting in accelerated battery degradation during high temperature charging.

[0005] Extensive battery management: Lack of a sophisticated battery management system makes it impossible to dynamically adjust the charging strategy according to battery status and temperature conditions, and is unable to effectively extend the battery cycle life.

[0006] In order to solve the above problems, the present application proposes a method for increasing the cycle life of lithium batteries at high temperatures. Summary of the invention

[0007] 1. Purpose of the invention In order to solve the technical problems existing in the background technology, the present invention proposes a method for increasing the cycle life of a lithium battery at high temperature. The present invention prolongs the cycle life of the battery; improves the adaptability of the equipment; and reduces the maintenance cost.

[0008] (II) Technical solution To solve the above problems, the present invention provides a method for increasing the cycle life of a lithium battery at high temperature, comprising the following steps: S1, single chip microcomputer detection: The microcontroller is responsible for detecting the ambient temperature, the percentage of remaining battery capacity, and the connection status of the power adapter; S2, protection mechanism starts: When the ambient temperature reaches 55 degrees Celsius, the remaining battery capacity is greater than 50% SOC, and the power adapter is connected, the MCU starts the battery protection mechanism, giving priority to the battery power supply and stopping the power adapter charging; S3, Dynamic Adjustment: In the battery protection mode, the MCU dynamically adjusts the battery charge and discharge to keep the remaining battery capacity between 20% SOC and 50% SOC to reduce battery attenuation and increase cycle life. S4. Return to normalcy: When the high temperature environment is lower than 55 degrees Celsius and lasts for a period of time (such as 10 minutes) or receives the "disable battery protection" information synchronized by the system / core, the MCU resumes the normal working mode, that is, restores the power supply of the power adapter and the battery charging state; S5. System / kernel settings: In the system / kernel section, the "Enable / Disable Battery Protection" option is provided. After the system / kernel is started, the settings are synchronized to the MCU once. In addition, users can set them according to actual needs and synchronize the settings to the MCU through the system / kernel.

[0009] S6. Default settings and synchronization mechanism: After the MCU is powered on, the normal working mode is set as the default setting, that is, the "battery protection mode" is not enabled. When the operating system is successfully started, or the user modifies the system / kernel "enable / disable battery protection" setting, the system / kernel will synchronize the setting to the MCU. If the MCU receives the "enable battery protection" setting, the "battery protection mode" is enabled. If the MCU receives the "disable battery protection" setting, the "battery protection mode" is disabled, that is, it is restored to normal.

[0010] Preferably, S1 includes: S1.1: Initialize the microcontroller and sensors: Configure the input and output ports of the microcontroller; Initialize the temperature sensor to ensure that it can accurately measure the ambient temperature; Initialize the battery power detection module to obtain the percentage of remaining battery capacity; Check the power adapter access port level to determine whether the power adapter is connected; S1.2. Collect data regularly: Use a temperature sensor to read the ambient temperature value regularly; Obtain the percentage of remaining battery capacity through the battery power detection module; Check the power level of the power adapter access port again to ensure the real-time connection status of the power adapter; S1.3. Data comparison: The collected ambient temperature, battery remaining capacity percentage, and power adapter status are compared with preset thresholds (such as 55 degrees Celsius, 50% SOC) to prepare for the next step.

[0011] Preferably, S2 includes: S2.1. Determine whether the conditions are met: Check whether the stored ambient temperature value reaches or exceeds 55 degrees Celsius; Check whether the remaining battery capacity percentage is greater than 50% SOC; Verify that the power adapter is plugged in; S2.2, start the battery protection mechanism: If the above three conditions are met at the same time, the microcontroller sends instructions to the relevant circuits to stop the charging function of the power adapter; At the same time, adjust the device power management strategy to give priority to battery power; Step 2.3: Status Feedback: The user is informed via an indicator light or a system interface that the battery protection mechanism has been activated.

[0012] Preferably, S3 includes: S3.1. Monitor the remaining battery capacity: In battery protection mode, the percentage of remaining battery capacity is continuously monitored; S3.2, Dynamically adjust the charging and discharging strategy: When the remaining battery capacity is close to 50% SOC, appropriately reduce the discharge current to slow down the rate of battery capacity decline; When the remaining battery capacity drops below 20% SOC, if conditions permit (such as the power adapter is connected), the charging function is gradually restored, but the charging current is kept within a safe range; S3.3. Optimize battery efficiency: The battery charging and discharging process is optimized through algorithms, such as pulse charging and intelligent discharge strategies, to further improve the battery efficiency and cycle life.

[0013] Preferably, in S4, it includes: S4.1. Check the ambient temperature: Regularly check whether the ambient temperature is below 55 degrees Celsius and observe it for a period of time; S4.2, receiving system / kernel instructions: Monitor the "disable battery protection" command sent by the system / kernel; S4.3. Restore normal working mode: When the ambient temperature is lower than 55 degrees Celsius for a period of time, or when receiving instructions from the system / kernel, the microcontroller sends instructions to the relevant circuits to restore the charging function of the power adapter; At the same time, adjust the device power management strategy to return to normal working mode; S4.4, Status Update: The user is informed that the battery protection mechanism has been released through the indicator light or the system interface.

[0014] Preferably, in S5, the method includes: S5.1. Provide setting interface: Added a "Battery protection" option in the system / kernel settings menu, providing two sub-options: "Enable" and "Disable"; S5.2. User operation: Users can select "enable" or "disable" battery protection in the setting interface according to actual needs; S5.3, Synchronous setting to MCU: The system / kernel synchronizes the user's settings to the microcontroller through a communication interface (such as I2C, SPI); The microcontroller updates its internal state based on the received settings to respond to the activation or deactivation of the battery protection mechanism.

[0015] Preferably, in S6, the method includes: S6.1, Default settings: The default setting of the MCU when powered on is normal mode, that is, the "battery protection mode" is not started; S6.1, MCU and system / kernel synchronization mechanism: After the system / core is powered on, the "enable / disable battery protection" option command will be synchronized to the MCU. If the MCU receives the "enable battery protection" command, it will turn on the "battery protection mode". If it receives the "disable battery protection" command, it will turn off the "battery protection mode", that is, restore to the normal mode; In addition to synchronizing the system / kernel once when it is powered on, users can also modify the "enable / disable battery protection" option configuration at any time. After the modification, the new option configuration will also be synchronized to the MCU, and the MCU will adjust the mode immediately.

[0016] Preferably, in S4.1, the observation time is ten minutes.

[0017] Preferably, in S5.3, the communication interface is I2C or SPI.

[0018] The above technical solution of the present invention has the following beneficial technical effects: Extend battery cycle life: By giving priority to using batteries for power supply in high temperature environments and controlling the remaining battery capacity within a reasonable range, battery degradation can be significantly reduced, thereby extending the battery cycle life.

[0019] Improve equipment adaptability: This method enables the equipment to adapt to high temperature environments, ensuring that it can still work normally under high temperature conditions, thereby improving the reliability and durability of the equipment.

[0020] Improve user experience: Users can set the battery protection mode according to actual needs, without having to worry about the battery being damaged due to overcharging in a high temperature environment, which improves the user experience and satisfaction.

[0021] Reduce maintenance costs: By extending the battery cycle life, the frequency and cost of battery replacement are reduced, reducing the overall equipment maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a flow chart of a method for increasing the cycle life of a lithium battery at high temperature. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0024] like Figure 1 As shown, a method for increasing the cycle life of a lithium battery at high temperature proposed by the present invention comprises the following steps: S1, single chip microcomputer detection: The microcontroller is responsible for detecting the ambient temperature, the percentage of remaining battery capacity, and the connection status of the power adapter; include: S1.1: Initialize the microcontroller and sensors: Configure the input and output ports of the microcontroller; Initialize the temperature sensor to ensure that it can accurately measure the ambient temperature; Initialize the battery power detection module to obtain the percentage of remaining battery capacity; Check the power adapter access port level to determine whether the power adapter is connected; S1.2. Collect data regularly: Use a temperature sensor to read the ambient temperature value regularly; Obtain the percentage of remaining battery capacity through the battery power detection module; Check the power level of the power adapter access port again to ensure the real-time connection status of the power adapter; S1.3. Data comparison: The collected ambient temperature, battery remaining capacity percentage, and power adapter status are compared with preset thresholds (such as 55 degrees Celsius, 50% SOC) to prepare for the next step.

[0025] include: S2, protection mechanism starts: When the ambient temperature reaches 55 degrees Celsius, the remaining battery capacity is greater than 50% SOC, and the power adapter is connected, the MCU starts the battery protection mechanism, giving priority to the battery power supply and stopping the power adapter charging; S2.1. Determine whether the conditions are met: Check whether the stored ambient temperature value reaches or exceeds 55 degrees Celsius; Check whether the remaining battery capacity percentage is greater than 50% SOC; Verify that the power adapter is plugged in; S2.2, start the battery protection mechanism: If the above three conditions are met at the same time, the microcontroller sends instructions to the relevant circuits to stop the charging function of the power adapter; At the same time, adjust the device power management strategy to give priority to battery power; Step 2.3: Status Feedback: The user is informed via an indicator light or a system interface that the battery protection mechanism has been activated.

[0026] S3, Dynamic Adjustment: In the battery protection mode, the MCU dynamically adjusts the battery charge and discharge to keep the remaining battery capacity between 20% SOC and 50% SOC to reduce battery attenuation and increase cycle life. include: S3.1. Monitor the remaining battery capacity: In battery protection mode, the percentage of remaining battery capacity is continuously monitored; S3.2, Dynamically adjust the charging and discharging strategy: When the remaining battery capacity is close to 50% SOC, appropriately reduce the discharge current to slow down the rate of battery capacity decline; When the remaining battery capacity drops below 20% SOC, if conditions permit (such as the power adapter is connected), the charging function is gradually restored, but the charging current is kept within a safe range; S3.3. Optimize battery efficiency: The battery charging and discharging process is optimized through algorithms, such as pulse charging and intelligent discharge strategies, to further improve the battery efficiency and cycle life.

[0027] S4. Return to normalcy: When the high temperature environment is lower than 55 degrees Celsius and lasts for a period of time or receives the "disable battery protection" information synchronized by the system / core, the MCU resumes the normal working mode, that is, restores the power supply of the power adapter and the battery charging state; include: S4.1. Check the ambient temperature: Regularly check whether the ambient temperature is below 55 degrees Celsius and observe it for a period of time; S4.2, receiving system / kernel instructions: Monitor the "disable battery protection" command sent by the system / kernel; S4.3. Restore normal working mode: When the ambient temperature is lower than 55 degrees Celsius for a period of time, or when receiving instructions from the system / kernel, the microcontroller sends instructions to the relevant circuits to restore the charging function of the power adapter; At the same time, adjust the device power management strategy to return to normal working mode; S4.4, Status Update: The user is informed that the battery protection mechanism has been released through the indicator light or the system interface.

[0028] S5. System / kernel settings: In the system / kernel section, the "Enable / Disable Battery Protection" option is provided. After the system / kernel is started, the settings are synchronized to the MCU once. In addition, users can set them according to actual needs and synchronize the settings to the MCU through the system / kernel.

[0029] include: S5.1. Provide setting interface: Added a "Battery protection" option in the system / kernel settings menu, providing two sub-options: "Enable" and "Disable"; S5.2. User operation: Users can select "enable" or "disable" battery protection in the setting interface according to actual needs; S5.3, Synchronous setting to MCU: The system / kernel synchronizes the user's settings to the microcontroller through a communication interface (such as I2C, SPI); The microcontroller updates its internal state based on the received settings to respond to the activation or deactivation of the battery protection mechanism.

[0030] S6. Default settings and synchronization mechanism: The MCU works in normal mode at the beginning of power-on, that is, the "battery protection mode" is not turned on. At the same time, it is always synchronized with the operating system during the working process. The operating system will synchronize the working mode once after power-on, and then if the user modifies the settings, it will also be synchronized to the MCU in real time.

[0031] include: S6.1, Default settings: The default setting of the MCU when powered on is normal mode, that is, the "battery protection mode" is not started; S6.1, MCU and system / kernel synchronization mechanism: After the system / core is powered on, the "enable / disable battery protection" option command will be synchronized to the MCU. If the MCU receives the "enable battery protection" command, it will turn on the "battery protection mode". If it receives the "disable battery protection" command, it will turn off the "battery protection mode", that is, restore to the normal mode; In addition to synchronizing the system / kernel once when it is powered on, users can also modify the "enable / disable battery protection" option configuration at any time. After the modification, the new option configuration will also be synchronized to the MCU, and the MCU will adjust the mode immediately.

[0032] In S4.1, the observation time is ten minutes.

[0033] In S5.3, the communication interface is I2C or SPI.

[0034] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A method for increasing the cycle life of a lithium battery at high temperature, characterized in that: The following steps are involved: S1, single chip microcomputer detection: The microcontroller is responsible for detecting the ambient temperature, the percentage of remaining battery capacity, and the connection status of the power adapter; S2, protection mechanism starts: When the ambient temperature reaches 55 degrees Celsius, the remaining battery capacity is greater than 50% SOC, and the power adapter is connected, the MCU starts the battery protection mechanism, giving priority to the battery power supply and stopping the power adapter charging; S3, Dynamic Adjustment: In the battery protection mode, the MCU dynamically adjusts the battery charge and discharge to keep the remaining battery capacity between 20% SOC and 50% SOC to reduce battery attenuation and increase cycle life. S4. Return to normalcy: When the high temperature environment is lower than 55 degrees Celsius and lasts for a period of time or receives the "disable battery protection" information synchronized by the system / core, the MCU resumes the normal working mode, that is, restores the power supply of the power adapter and the battery charging state; S5. System / kernel settings: In the system / kernel section, the "Enable / Disable Battery Protection" option is provided. After the system / kernel is started, the settings are synchronized to the MCU once. In addition, users can set them according to actual needs and synchronize the settings to the MCU through the system / kernel. S6. Default settings and synchronization mechanism: After the MCU is powered on, the normal working mode is set as the default setting, that is, the "battery protection mode" is not started. When the operating system is successfully started, or the user modifies the system / kernel "enable / disable battery protection" setting, the system / kernel will synchronize the setting to the MCU; if the MCU receives the "enable battery protection" setting, it will start the "battery protection mode", if it receives the "disable battery protection" setting, it will turn off the "battery protection mode", that is, restore to normal.

2. A method for increasing the cycle life of a lithium battery at high temperature according to claim 1, characterized in that: In S1, it includes: S1.1: Initialize the microcontroller and sensors: Configure the input and output ports of the microcontroller; Initialize the temperature sensor; Initialize the battery power detection module to obtain the percentage of remaining battery capacity; Check the power adapter access port level to determine whether the power adapter is connected; S1.

2. Collect data regularly: Use a temperature sensor to read the ambient temperature value regularly; Obtain the percentage of remaining battery capacity through the battery power detection module; Check the power level of the port where the power adapter is connected again; S1.3, Data comparison: The collected ambient temperature, battery remaining capacity percentage, and power adapter status are compared with preset thresholds to prepare for the next operation.

3. The method for increasing the cycle life of a lithium battery at high temperature according to claim 1, characterized in that: In S2, it includes: S2.

1. Determine whether the conditions are met: Check whether the stored ambient temperature value reaches or exceeds 55 degrees Celsius; Check whether the remaining battery capacity percentage is greater than 50% SOC; Verify that the power adapter is plugged in; S2.2, start the battery protection mechanism: If the above three conditions are met at the same time, and the MCU has started the "battery protection mode", the MCU sends instructions to the relevant circuits to stop the charging function of the power adapter; At the same time, adjust the device power management strategy to give priority to battery power; Step 2.3: Status feedback: The user is informed via an indicator light or a system interface that the battery protection mechanism has been activated.

4. A method for increasing the cycle life of a lithium battery at high temperature according to claim 3, characterized in that: In S3, this includes: S3.

1. Monitor the remaining battery capacity: In battery protection mode, the percentage of remaining battery capacity is continuously monitored; S3.2, Dynamically adjust the charging and discharging strategy: When the remaining battery capacity is close to 50% SOC, reduce the discharge current appropriately; When the remaining battery capacity drops below 20% SOC, if conditions permit, the charging function will be gradually restored, but the charging current will be kept within a safe range; S3.

3. Optimize battery efficiency: The battery charging and discharging process is optimized through algorithms.

5. The method for increasing the cycle life of a lithium battery at high temperature according to claim 1, characterized in that: In S4, it includes: S4.

1. Check the ambient temperature: Regularly check whether the ambient temperature is below 55 degrees Celsius and observe it for a period of time; S4.2, receiving system / kernel instructions: Monitor the "disable battery protection" command sent by the system / kernel; S4.

3. Restore normal working mode: When the ambient temperature is lower than 55 degrees Celsius for a period of time, or when receiving instructions from the system / kernel, the microcontroller sends instructions to the relevant circuits to restore the charging function of the power adapter; At the same time, adjust the device power management strategy to return to normal working mode; S4.4, Status Update: The user is informed that the battery protection mechanism has been released through the indicator light or the system interface.

6. The method for increasing the cycle life of a lithium battery at high temperature according to claim 1, characterized in that: In S5, it includes: S5.

1. Provide setting interface: Added "Battery protection" option in the system / kernel settings menu, providing two sub-options: "Enable" and "Disable"; S5.

2. User operation: Users can select "enable" or "disable" battery protection in the settings interface according to actual needs; S5.3, Synchronous setting to MCU: The system / kernel synchronizes the user's settings to the microcontroller through the communication interface; The microcontroller updates its internal state based on the received settings to respond to the activation or deactivation of the battery protection mechanism.

7. The method for increasing the cycle life of a lithium battery at high temperature according to claim 1, characterized in that: S6 includes: S6.1, Default settings: The default setting of the microcontroller when powered on is normal mode, that is, the "battery protection mode" is not started; S6.1, MCU and system / kernel synchronization mechanism: After the system / kernel is powered on, the "enable / disable battery protection" option command will be synchronized to the MCU. If the MCU receives the "enable battery protection" command, it will turn on the "battery protection mode". If it receives the "disable battery protection" command, it will turn off the "battery protection mode", that is, restore to the normal mode; In addition to synchronizing the system / kernel once when it is powered on, users can also modify the "enable / disable battery protection" option configuration at any time. After the modification, the new option configuration will also be synchronized to the MCU, and the MCU will adjust the mode immediately.

8. A method for increasing the cycle life of a lithium battery at high temperature according to claim 6, characterized in that: In S4.1, the observation time is ten minutes.

9. The method for increasing the cycle life of a lithium battery at high temperature according to claim 1, characterized in that: In S5.3, the communication interface is I2C or SPI.

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