Cut-off voltage control method, system and electronic equipment

Abstract

The present application discloses a cut-off voltage control method, system and electronic device, belonging to the field of battery technology, including: determining that the battery cell temperature is in a first temperature range, and the remaining capacity of the battery is less than or equal to the capacity threshold; in response to the discharge rate of the battery being less than or equal to the first discharge threshold, adjusting the battery cut-off voltage to a first voltage value; in response to the discharge rate being greater than the second discharge threshold, adjusting the cut-off voltage to a second voltage value; wherein the second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature range is characterized as the range of the rated operating temperature of the battery. The method provided in the present application adjusts the battery cut-off voltage according to the battery cell temperature and the discharge rate when it is determined that the remaining capacity of the battery reaches a certain range, so that the battery can discharge more electricity at a high discharge rate, thereby extending the battery life and improving the battery endurance.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a cut-off voltage control method, system and electronic device. Background Art

[0002] Electronic devices encounter a variety of different discharge modes during daily use, such as standby mode and high-load mode. In standby mode, the battery uses a low-rate current to discharge, the battery discharges a lot of electricity, and the rebound voltage is small; while in high-load mode, the battery uses a high-rate current to discharge, the battery discharges less electricity, and the rebound voltage is high. Since the battery's cut-off voltage cannot be adjusted according to different discharge modes, when the battery is discharged at a high-rate current, there is a large amount of available reserved capacity that cannot be released, thereby reducing the battery's capacity utilization and shortening the battery's battery life. Summary of the invention

[0003] The purpose of an embodiment of the present application is to provide a cut-off voltage control method to solve the technical problem that the cut-off voltage of a battery cannot be adjusted according to different discharge modes in the prior art, thereby reducing the capacity utilization rate of the battery. Another purpose of an embodiment of the present application is to provide a cut-off voltage control system to solve the technical problem that the cut-off voltage of a battery cannot be adjusted according to different discharge modes in the prior art, thereby reducing the capacity utilization rate of the battery.

[0004] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In a first aspect, a cut-off voltage control method is provided, comprising:

[0006] Determining that a cell temperature of the battery is in a first temperature range and that a remaining capacity of the battery is less than or equal to a capacity threshold;

[0007] In response to a discharge rate of the battery being less than or equal to a first discharge threshold, adjusting a cutoff voltage of the battery to a first voltage value;

[0008] In response to the discharge rate being greater than a second discharge threshold, adjusting the cut-off voltage to a second voltage value;

[0009] The second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature interval is characterized as a rated operating temperature range of the battery.

[0010] In combination with the first aspect, the method further includes:

[0011] In response to the discharge rate being greater than a first discharge threshold and less than or equal to a second discharge threshold, adjusting the cut-off voltage to a third voltage value;

[0012] The third voltage value is greater than the second voltage value and less than the first voltage value.

[0013] In combination with the first aspect, the method further includes:

[0014] In response to the discharge rate being greater than the first discharge threshold and less than or equal to the third discharge threshold, adjusting the cut-off voltage to a third voltage value;

[0015] The third discharge threshold is greater than the first discharge threshold and less than the second discharge threshold, and the third voltage value is greater than the second voltage value and less than the first voltage value.

[0016] In combination with the first aspect, the method further includes:

[0017] In response to the discharge rate being greater than a third discharge threshold and less than or equal to the second discharge threshold, adjusting the cut-off voltage to a fourth voltage value;

[0018] The third discharge threshold is greater than the first discharge threshold and less than the second discharge threshold, and the fourth voltage value is greater than the second voltage value and less than the third voltage value.

[0019] In combination with the first aspect, the method further includes:

[0020] Determining that the battery cell temperature is in a second temperature range and the remaining capacity of the battery is less than or equal to a capacity threshold, and adjusting the cut-off voltage to a third voltage value;

[0021] The third voltage value is greater than the second voltage value and less than the first voltage value, and the second temperature interval is characterized as a range of non-rated operating temperatures of the battery.

[0022] In combination with the first aspect, the range of the first temperature interval includes 15~60°C, and the range of the second temperature interval includes 0~15°C.

[0023] In combination with the first aspect, the cut-off voltage includes at least one of a discharge end voltage, an over-discharge protection voltage and a shutdown voltage.

[0024] In combination with the first aspect, the capacity threshold value has a value range of 5% to 15%.

[0025] In a second aspect, a cut-off voltage control system is provided, the system comprising:

[0026] a first monitoring module, the first monitoring module being configured to determine whether the remaining capacity of the battery is less than or equal to a capacity threshold;

[0027] a second monitoring module, the second monitoring module being configured to determine whether a cell temperature of the battery is within a first temperature range;

[0028] a first regulating module, the first regulating module being configured to regulate a cut-off voltage of the battery to a first voltage value in response to a discharge rate of the battery being less than or equal to a first discharge threshold;

[0029] a second regulating module, the second regulating module being configured to regulate the cut-off voltage to a second voltage value in response to the discharge rate being greater than a second discharge threshold;

[0030] The second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature interval is characterized as a rated operating temperature range of the battery.

[0031] In a third aspect, an electronic device is provided, comprising a memory and a processor; the memory is used to store a computer program; the processor is used to implement a cutoff voltage control method as described in any one of the first aspects when executing the computer program.

[0032] One of the above technical solutions has the following advantages or beneficial effects:

[0033] The embodiment of the present application provides a cut-off voltage control method, including: determining that the remaining capacity of the battery is less than or equal to the capacity threshold, and the battery cell temperature is in a first temperature range, in response to the discharge rate of the battery being less than or equal to the first discharge threshold, adjusting the battery cut-off voltage to a first voltage value; in response to the discharge rate being greater than the second discharge threshold, adjusting the cut-off voltage to a second voltage value; wherein the second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature range is characterized as the rated operating temperature range of the battery. The cut-off voltage control method provided by the present application adjusts the battery cut-off voltage according to the battery cell temperature and the discharge rate when it is determined that the remaining capacity of the battery reaches a certain range, so that the battery can discharge more electricity at a high discharge rate, thereby extending the battery life and improving the battery endurance.

[0034] The embodiment of the present application also provides a cut-off voltage control system, the system includes: a first monitoring module, the first monitoring module is configured to determine that the remaining capacity of the battery is less than or equal to the capacity threshold; a second monitoring module, the second monitoring module is configured to determine that the battery cell temperature is in a first temperature range; a first regulating module, the first regulating module is configured to adjust the battery cut-off voltage to a first voltage value in response to the discharge rate of the battery being less than or equal to the first discharge threshold; a second regulating module, the second regulating module is configured to adjust the cut-off voltage to a second voltage value in response to the discharge rate being greater than the second discharge threshold; wherein the second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature range is characterized as the range of the rated operating temperature of the battery. The cut-off voltage control system provided in the present application determines that the remaining capacity of the battery reaches a certain range through the first monitoring module, and then determines that the battery cell temperature is in the first temperature range according to the second monitoring module, and finally adjusts the battery cut-off voltage according to the discharge rate of the battery through the first regulating module or the second regulating module, so that the battery can discharge more electricity at a high discharge rate, thereby extending the battery life and improving the battery endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0036] Figure 1 A schematic diagram of the steps of the cut-off voltage control method provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a module of a cut-off voltage control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. In the description of the present application, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In some embodiments of the present application, during the battery discharge process, due to different user habits of using the device, the battery has different discharge rates and discharge temperatures, and the power-consuming device will not adjust the cut-off voltage according to the battery usage, resulting in large differences in the battery capacity released by different users when using the device. Usually, when discharging at a high rate current, the capacity released by the battery is low, but the rebound voltage is high, resulting in low battery capacity utilization, and a large amount of available reserved capacity inside the battery that cannot be released, thereby shortening the battery life. As shown in Table 1 below:

[0040] Table 1

[0041]

[0042] It can be seen from Table 1 that when the discharge rate is less than 0.2C, the battery capacity utilization rate reaches 100%, and the battery capacity can be fully utilized at this time; when the discharge rate is greater than 0.2C and less than or equal to 0.5C, the battery capacity utilization rate is not less than 97%, that is, 3% of the battery capacity is not utilized; when the discharge rate is greater than 0.5C and less than or equal to 1.0C, the battery capacity utilization rate is not less than 95%, that is, 5% of the battery capacity is not utilized; when the discharge rate is greater than 1.0C, the battery capacity utilization rate is not less than 93%, that is, 7% of the battery capacity is not utilized. It can be seen that when the cut-off voltage remains unchanged, the greater the discharge rate of the battery, the lower the battery capacity utilization rate, and the battery life is significantly shortened.

[0043] The end of discharge voltage (EDV) provided in the embodiment of the present application is also called the end of discharge voltage. During the discharge process of the battery, as the remaining capacity decreases, the battery voltage gradually decreases. When the battery is discharged to less than or equal to the cut-off voltage, the battery will no longer continue to discharge, and the remaining capacity of the battery is set to 0%.

[0044] In some embodiments of the present application, the cut-off voltage may also include an over-discharge protection voltage and a shutdown voltage, wherein the over-discharge protection voltage refers to the minimum allowable voltage value reached by the battery during the discharge process. When the battery voltage drops to or below the set over-discharge protection voltage, the battery protection circuit will automatically cut off the connection between the battery and the load to protect the battery from damage caused by over-discharge. The setting of the over-discharge protection voltage can help extend the service life of the battery and avoid the negative effects of over-discharge on the battery. The shutdown voltage refers to the voltage threshold at which the electrical device will automatically shut down or enter the standby state when the battery voltage drops to a certain level. When the battery voltage drops to or below the set shutdown voltage, the electrical device will automatically stop running to avoid abnormal operation of the electrical device or data loss due to low battery power. The shutdown voltage is set to protect the device and data and remind the user to charge or replace the battery.

[0045] The embodiment of the present application proposes that when the remaining capacity of the battery approaches a certain level, the changes in current and temperature are detected to adjust the cut-off voltage point, thereby increasing the available capacity of the battery, extending the battery life of the electrical equipment, solving the user's extra usage time in an emergency situation, improving the utilization rate of the retained capacity, and meeting the user's discharge capacity requirements in emergency mode.

[0046] The batteries mentioned in the embodiments of the present application are classified by shape, including battery packs, cylindrical batteries, square batteries, blade batteries, etc. The batteries are classified by the internal components, including lithium-ion batteries, lithium polymer batteries, lead-acid batteries, lithium manganese oxide batteries, lithium manganese oxide polymer batteries, and fuel cells, etc.

[0047] The specific implementation methods of the present application are described below by way of examples:

[0048] like Figure 1 As shown, an embodiment of the present application provides a cut-off voltage control method, comprising:

[0049] S1: Determine whether the remaining capacity of the battery is less than or equal to a capacity threshold.

[0050] Specifically, the remaining capacity of a battery refers to the amount of electrical energy currently available from the battery, usually measured in the form of charge or energy. The unit of the remaining capacity of a battery is usually ampere-hour (Ah) or milliampere-hour (mAh), which indicates the duration of current that the battery can provide under specific conditions. For example, a 1Ah battery can provide 1A of current for 1 hour, while a 2000mAh battery can provide 2A of current for 1 hour.

[0051] Specifically, the remaining capacity of the battery can be monitored and displayed by a battery management system or a battery charge indicator. These systems can use sensors and algorithms inside the battery to estimate the remaining capacity of the battery and display it as a percentage or other form.

[0052] In the embodiment of the present application, the capacity threshold is used to determine whether the remaining capacity of the battery is about to be exhausted, so as to facilitate the adjustment of the battery cut-off voltage. When the remaining capacity of the battery is greater than the capacity threshold, there is still a large amount of charge in the battery. At this time, the battery is sufficient and the user does not need to worry about the battery life; when the battery is about to be exhausted, the battery life can be extended by adjusting the cut-off voltage.

[0053] In the embodiment of the present application, the value range of the capacity threshold includes 5% to 15%, and the capacity thresholds that can be obtained include but are not limited to 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, and 14%. When the remaining capacity of the battery is within this value range, there is a certain amount of electricity inside the battery. At this time, adjusting the cut-off voltage can be enough for the user to use for a longer time. Of course, this value range does not mean that other values ​​are not desirable, because most electrical devices have unstable voltage when the remaining capacity of the battery is less than 5%, and there is a situation of instant shutdown; when it is greater than 15%, the remaining capacity of the battery is relatively large, and the user has enough time to deal with emergencies.

[0054] S2: Determine that the battery cell temperature is in a first temperature range.

[0055] Specifically, the cell temperature of a battery is an important indicator that affects battery discharge. An increase in the cell temperature increases the resistance inside the battery, causing the flow of current inside the battery to be hindered, thereby reducing the battery's discharge capacity. An increase in internal resistance will also cause the battery's own power consumption to increase, causing the battery to discharge faster. In addition, an increase in the cell temperature will reduce the effective capacity of the battery, that is, the amount of electricity that the battery can store is reduced. This is because the battery will have a greater self-discharge phenomenon at high temperatures, resulting in energy loss when the battery is not in use. At the same time, an increase in the cell temperature will accelerate the rate of chemical reactions inside the battery, resulting in an increase in the battery discharge rate. This means that under the same load, the battery will run out of power faster in a high temperature environment. An increase in the cell temperature will increase the battery's self-discharge rate, that is, the energy loss of the battery when it is not in use. This will result in a decrease in the battery discharge efficiency and a shorter storage time.

[0056] In an embodiment of the present application, when it is determined that the remaining capacity of the battery is close to exhaustion, it is determined whether the current battery cell temperature is in a first temperature interval. The temperature range of the first temperature interval includes 15~60℃, which is the rated operating temperature range of the battery, that is, in this temperature range, the discharge efficiency of the battery is higher and is less affected by temperature.

[0057] In some embodiments of the present application, after determining that the current battery cell temperature is in the first temperature interval, it is determined whether the remaining capacity of the battery is less than or equal to the capacity threshold. The temperature range of the first temperature interval includes 15~60°C, the value range of the capacity threshold includes 5%~15%, and the capacity thresholds that can be obtained include but are not limited to 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, and 14%.

[0058] S31: In response to a discharge rate of the battery being less than or equal to a first discharge threshold, adjusting a cut-off voltage of the battery to a first voltage value.

[0059] Specifically, the discharge rate of a battery refers to the ability of the battery to continuously provide current, usually expressed in multiples. The discharge rate indicates the proportional relationship between current and battery capacity. For example, a battery with a capacity of 1000mAh can be discharged at a current of 2000mA (or 2A) if its discharge rate is 2C. Similarly, if the discharge rate is 0.5C, it can only be discharged at a current of 500mA (or 0.5A). The unit of the discharge rate is usually C, which is a multiple of the battery capacity.

[0060] In the embodiment of the present application, the first discharge threshold is used to determine the discharge rate of the battery, and the cut-off voltage of the battery is adjusted according to the discharge rate of the battery.

[0061] In the embodiment of the present application, the discharge rate of the first discharge threshold is 0.2C, and the first voltage value is 3.25V / cell, where cell represents a single cell in the battery, that is, the voltage of a single cell in the battery needs to be monitored. When the discharge rate of the battery during discharge is less than 0.2C, the discharge rate of the battery is small, and the electrical equipment is usually in standby mode, indicating that the user is not in a hurry to use the electrical equipment. Therefore, the cut-off voltage of the battery can be left unchanged or reduced to a smaller value, thereby ensuring that the battery retains a higher starting voltage and saving charging time.

[0062] S32: In response to the discharge rate being greater than the second discharge threshold, adjusting the cut-off voltage to a second voltage value.

[0063] Specifically, the discharge rate of the second discharge threshold is 1.0C, and the second voltage value is 2.6V / cell. When the discharge rate of the battery during discharge is greater than 1.0C, the discharge rate of the battery is large, and the electrical equipment is usually in a high-power operation state, indicating that the user is using a relatively large software, or using a lot of software at the same time. In order to meet the user's usage needs, the battery cut-off voltage can be adjusted to the lowest value, so that the battery can release more power and improve the battery life.

[0064] S33: In response to the discharge rate being greater than the first discharge threshold and less than or equal to the second discharge threshold, adjusting the cut-off voltage to a third voltage value; wherein the third voltage value is greater than the second voltage value and less than the first voltage value.

[0065] Specifically, the discharge rate of the first discharge threshold is 0.2C, the discharge rate of the second discharge threshold is 1.0C, and the third voltage value is 3.0~2.7V / cell. It can be understood that when the discharge rate of the battery is greater than 0.2C and less than or equal to 1.0C, the discharge rate of the battery is in the daily office range, which means that it is used to process online work meetings, work emails, documents and work reports. Therefore, the cut-off voltage of the battery can be reduced to 3.0~2.7V / cell, so that the battery can release more power than in standby mode, extending the battery life to ensure that users have enough time to handle work matters.

[0066] S34: In response to the discharge rate being greater than the first discharge threshold and less than or equal to the third discharge threshold, adjusting the cutoff voltage to a third voltage value; wherein the third discharge threshold is greater than the first discharge threshold and less than the second discharge threshold, and the third voltage value is greater than the second voltage value and less than the first voltage value.

[0067] Specifically, the discharge rate of the first discharge threshold is 0.2C, the discharge rate of the third discharge threshold is 0.5C, and the third voltage value is 3.0V / cell. When the discharge rate of the battery is greater than 0.2C and less than or equal to 0.5C, the discharge rate of the battery is within the daily office range, and the number of office software used is relatively small. In order to ensure that users have more time to handle work matters, the battery cut-off voltage can be reduced to 3.0V / cell, so that the battery can release more power than in standby mode, which can not only extend the battery life and allow users to have enough time to handle work, but also ensure that the battery has a higher starting voltage, saving battery charging time.

[0068] S35: In response to the discharge rate being greater than the third discharge threshold and less than or equal to the second discharge threshold, adjusting the cutoff voltage to a fourth voltage value; wherein the third discharge threshold is greater than the first discharge threshold and less than the second discharge threshold, and the fourth voltage value is greater than the second voltage value and less than the third voltage value.

[0069] Specifically, the discharge rate of the third discharge threshold is 0.5C, the discharge rate of the second discharge threshold is 1.0C, and the third voltage value is 2.8V / cell. When the discharge rate of the battery is greater than 0.5C and less than or equal to 1.0C, the discharge rate of the battery is within the daily office range, and a large number of office software are used. In order to ensure that users have enough time to handle work matters, the battery cut-off voltage can be reduced to 2.8V / cell, so that the battery can release more power than when the cut-off voltage is 3.0V / cell, thereby extending the battery life and giving users more time to handle work matters.

[0070] S4: Determine that the battery cell temperature is in the second temperature range and the remaining capacity of the battery is less than or equal to the capacity threshold, and adjust the cut-off voltage to a third voltage value; wherein the third voltage value is greater than the second voltage value and less than the first voltage value, and the second temperature range is characterized as a range of non-rated operating temperatures of the battery.

[0071] Specifically, the non-rated operating temperature of the battery refers to the temperature range in which the internal resistance of the battery increases and the discharge efficiency is low. Usually, the second temperature range includes 0~15℃. When it is determined that the temperature of the battery cell is in the range of 0~15℃, the cut-off voltage of the battery is adjusted to 3.0V / cell regardless of the discharge rate of the battery. At this time, due to the low discharge efficiency of the battery itself, if the cut-off voltage is reduced too much, it will cause irreversible damage to the battery, thereby reducing the battery life and affecting the battery life. Therefore, adjusting the battery cut-off voltage to 3.0V / cell can not only extend the battery life, so that users have enough time to handle work, but also ensure that the battery has a higher starting voltage, save battery charging time, and avoid damage to the battery.

[0072] It should be noted that the temperature range in which the battery can work is 0~60℃. When the battery cell temperature drops to below zero, the battery capacity decreases significantly, which will greatly shorten the battery life. At the same time, the internal resistance of the battery increases, which will reduce the discharge capacity of the battery, causing the working voltage of the battery to drop too much, affecting the normal operation of the electrical equipment. When the battery cell temperature exceeds 60℃, it will affect the increase of the internal chemical reaction rate of the battery, reduce the battery capacity, increase the resistance, accelerate the self-discharge rate, and the battery will not be able to provide current output and power storage normally, seriously affecting the performance of the battery; and when the battery cell temperature exceeds 60℃, the working voltage of the battery is unstable and fluctuates greatly. At this time, using the battery will increase the internal pressure and gas generation of the battery, thereby causing the risk of battery expansion, leakage, rupture, and even fire and explosion. It is worth noting that in some embodiments of the present application, the temperature range suitable for the battery to work can be lower than 0℃, or higher than 60℃. The specific situation is different according to the design of the material or characteristic structure used by the battery. The embodiments of the present application do not make too many restrictions on this.

[0073] It can be understood that when the cut-off voltage control method provided in the embodiment of the present application determines that the remaining capacity of the battery reaches a certain range, it can take into account the battery cell temperature and the discharge rate to adjust the cut-off voltage of the battery, so that the battery can discharge more electricity at a high discharge rate, thereby extending the battery life, improving the battery endurance, and providing users with more time to process work.

[0074] like Figure 2As shown, an embodiment of the present application also provides a cut-off voltage control system, the system comprising: a first monitoring module, a second monitoring module, a first regulating module and a second regulating module; the first monitoring module is configured to determine that the remaining capacity of the battery is less than or equal to a capacity threshold; the second monitoring module is configured to determine that the battery cell temperature is in a first temperature range; the first regulating module is configured to adjust the cut-off voltage of the battery to a first voltage value in response to a discharge rate of the battery being less than or equal to a first discharge threshold; the second regulating module is configured to adjust the cut-off voltage to a second voltage value in response to a discharge rate being greater than a second discharge threshold; wherein the second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature range is characterized as the range of the rated operating temperature of the battery.

[0075] Specifically, the cut-off voltage control system of the present application monitors the remaining capacity of the battery at all times through the first monitoring module to determine whether the remaining capacity of the battery is less than or equal to the capacity threshold, and the value range of the capacity threshold includes 5%~15%; the battery cell temperature is constantly monitored by the second monitoring module to determine whether the battery cell temperature is in the first temperature range, and the temperature range of the first temperature range includes 15~60℃; when all the above conditions are met, if the discharge rate of the battery is less than or equal to the first discharge threshold, the cut-off voltage of the battery is adjusted to the first voltage value, the discharge rate of the first discharge threshold is 0.2C, and the first voltage value is 3.25V / cell; and when the discharge rate of the battery is greater than the second discharge threshold, the cut-off voltage of the battery is adjusted to the second voltage value, the discharge rate of the second discharge threshold is 1.0C, and the size of the second voltage value is 2.6V / cell. By adjusting the cut-off voltage of the battery, the battery can release more power than in the standby state, extending the battery life to ensure that the user has enough time to handle work matters.

[0076] In the embodiment of the present application, the cut-off voltage control system further includes a third regulating module, a fourth regulating module and a fifth regulating module; wherein the third regulating module is configured to adjust the cut-off voltage to a third voltage value in response to a discharge rate greater than the first discharge threshold and less than or equal to the second discharge threshold; wherein the third voltage value is greater than the second voltage value and less than the first voltage value; and the magnitude of the third voltage value is 3.0~2.7V / cell. The fourth regulating module is configured to adjust the cut-off voltage to a third voltage value in response to a discharge rate greater than the first discharge threshold and less than or equal to the third discharge threshold; wherein the third discharge threshold is greater than the first discharge threshold, the third discharge threshold is less than the second discharge threshold, the third voltage value is greater than the second voltage value and less than the first voltage value; and the discharge rate of the third discharge threshold is 0.5C. The fifth regulating module is configured to adjust the cut-off voltage to a fourth voltage value in response to a discharge rate greater than the third discharge threshold and less than or equal to the second discharge threshold; wherein the third discharge threshold is greater than the first discharge threshold, the third discharge threshold is less than the second discharge threshold, and the fourth voltage value is greater than the second voltage value and less than the first voltage value.

[0077] The third regulating module, the fourth regulating module and the fifth regulating module provided by the cut-off voltage control system of the present application can adjust the cut-off voltage of the battery to different values ​​according to different discharge rates of the battery when it is determined that the battery cell temperature is in the first temperature range, so that the battery can release more electricity, thereby extending the battery life to ensure that the user has enough time to handle work matters.

[0078] The cut-off voltage control system of the present application also provides a sixth adjustment module, which is configured to determine that the battery cell temperature is in the second temperature range and adjust the cut-off voltage to a third voltage value; wherein the third voltage value is greater than the second voltage value and less than the first voltage value, and the second temperature range is characterized as a range of non-rated operating temperatures of the battery. The range of the second temperature range includes 0~15°C. When it is determined that the temperature of the battery cell is in the range of 0~15°C, regardless of the discharge rate of the battery, the cut-off voltage of the battery is adjusted to 3.0V / cell. At this time, due to the low discharge efficiency of the battery itself, if the cut-off voltage is reduced too much, it will cause irreversible damage to the battery, thereby reducing the battery life and affecting the battery life.

[0079] It can be understood that the cut-off voltage control system provided in the embodiment of the present application can adjust different cut-off voltages for the battery according to the temperature range of the battery cell and the battery discharge rate during the battery discharge process, so that the battery can release more power, improve the battery life, and provide users with more time to handle work.

[0080] An embodiment of the present application also provides an electronic device, including a memory and a processor; the memory is used to store a computer program; the processor is used to implement a cutoff voltage control method provided in any of the above embodiments when executing the computer program.

[0081] The electronic devices referred to in this application include laptop computers, mobile phones, tablet computers, etc. When these electronic devices use the cut-off voltage control method provided in the embodiments of this application, the electronic devices can adjust different cut-off voltages for the battery according to the temperature range of the battery cell during battery discharge and the battery discharge rate, so that the battery can release more power, improve the battery life, and provide users with more time to handle work.

[0082] The above is a detailed introduction to a cut-off voltage control method, system and electronic device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cut-off voltage control method, characterized in that: include: Determining that a cell temperature of the battery is in a first temperature range and that a remaining capacity of the battery is less than or equal to a capacity threshold; In response to a discharge rate of the battery being less than or equal to a first discharge threshold, adjusting a cutoff voltage of the battery to a first voltage value; In response to the discharge rate being greater than a second discharge threshold, adjusting the cut-off voltage to a second voltage value; The second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature interval is characterized as a rated operating temperature range of the battery.

2. The cut-off voltage control method according to claim 1, characterized in that: The method further comprises: In response to the discharge rate being greater than a first discharge threshold and less than or equal to a second discharge threshold, adjusting the cut-off voltage to a third voltage value; The third voltage value is greater than the second voltage value and less than the first voltage value.

3. The cut-off voltage control method according to claim 1, characterized in that: The method further comprises: In response to the discharge rate being greater than the first discharge threshold and less than or equal to the third discharge threshold, adjusting the cut-off voltage to a third voltage value; The third discharge threshold is greater than the first discharge threshold and less than the second discharge threshold, and the third voltage value is greater than the second voltage value and less than the first voltage value.

4. The cut-off voltage control method according to claim 3, characterized in that: The method further comprises: In response to the discharge rate being greater than a third discharge threshold and less than or equal to the second discharge threshold, adjusting the cut-off voltage to a fourth voltage value; The third discharge threshold is greater than the first discharge threshold and less than the second discharge threshold, and the fourth voltage value is greater than the second voltage value and less than the third voltage value.

5. The cut-off voltage control method according to claim 1, wherein: The method further comprises: Determining that the battery cell temperature is in a second temperature range and the remaining capacity of the battery is less than or equal to a capacity threshold, and adjusting the cut-off voltage to a third voltage value; The third voltage value is greater than the second voltage value and less than the first voltage value, and the second temperature interval is characterized as a range of non-rated operating temperatures of the battery.

6. The cut-off voltage control method according to claim 5, characterized in that: The first temperature range includes 15-60°C, and the second temperature range includes 0-15°C.

7. The cut-off voltage control method according to claim 1, characterized in that: The cut-off voltage includes at least one of a discharge end voltage, an over-discharge protection voltage and a shutdown voltage.

8. The cut-off voltage control method according to claim 1, wherein: The capacity threshold value ranges from 5% to 15%.

9. A cut-off voltage control system, characterized in that: The system comprises: a first monitoring module, the first monitoring module being configured to determine whether the remaining capacity of the battery is less than or equal to a capacity threshold; a second monitoring module, the second monitoring module being configured to determine whether a cell temperature of the battery is within a first temperature range; a first regulating module, the first regulating module being configured to regulate a cut-off voltage of the battery to a first voltage value in response to a discharge rate of the battery being less than or equal to a first discharge threshold; a second regulating module, the second regulating module being configured to regulate the cut-off voltage to a second voltage value in response to the discharge rate being greater than a second discharge threshold; The second discharge threshold is greater than the first discharge threshold, the first voltage value is greater than the second voltage value, and the first temperature interval is characterized as a rated operating temperature range of the battery.

10. An electronic device, characterized in that: The invention comprises a memory and a processor; the memory is used to store a computer program; the processor is used to implement the cut-off voltage control method according to any one of claims 1 to 8 when executing the computer program.

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