Method and device for determining cut-off voltage of battery and electronic equipment
By obtaining the target data of the battery cell and using the target database to determine the target cutoff voltage of the battery, the problem of actual use capacity reduction caused by the difference in RTC capacity provided by different batteries at the same cutoff voltage is solved, and the actual use capacity of the battery is guaranteed.
Patent Information
- Application Number
- CN202510237633.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-06-27
AI Technical Summary
In the prior art, lithium batteries may lead to a decrease in actual use capacity at the same cutoff voltage, because there are differences in RTC capacity provided by different batteries at the same cutoff voltage.
By obtaining the target data of the battery cell, including the target cathode material, the target capacity, the target energy density platform and the target real-time clock demand capacity, and based on these data and the target database, the target cutoff voltage corresponding to the battery is determined. The target database stores the corresponding relationship between the energy density platform corresponding to the battery cell, the cathode material, the battery capacity, the battery cutoff voltage and the capacity that can be provided to the real-time clock.
By comprehensively considering the impact of the cathode material, capacity and energy density platform of the battery cell on RTC capacity, the target cutoff voltage that matches the target real-time clock demand capacity can be quickly and accurately determined, thereby ensuring the actual use capacity of the battery and avoiding the actual use capacity reduction.
Smart Images
Figure CN120215631A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of batteries, and in particular, to a method, apparatus, and electronic device for determining the cut-off voltage of a battery. Background Art
[0002] Most lithium battery circuit designs are equipped with a hardware protection IC (integrated circuit), and this IC has the function of an RTC (Real-time clock). The RTC has the function of powering the terminal system clock.
[0003] In the related art, for batteries with the same RTC capacity requirement, a fixed voltage point (such as 3.25V) is usually determined as their cut-off voltage. However, since different batteries may have different RTC capacities that can be provided at the same cut-off voltage, some batteries may be able to provide an RTC capacity that exceeds the RTC capacity requirement at this fixed cut-off voltage, which may lead to a reduction in the actual usable capacity of the battery. For example, the RTC capacity requirement is 50 mAh, and the fixed cut-off voltage corresponding to this RTC capacity requirement is 3.25V. Battery A can meet this RTC requirement capacity when the voltage is between 3.0V and 2.5V (i.e., from 3.0V to when the hardware protection IC shuts down), and battery B can meet this RTC requirement capacity when the voltage is between 3.1V and 2.5V (i.e., from 3.1V to when the hardware protection IC shuts down). If 3.25V is used as the cut-off voltage for battery A and battery B, the actual usable capacities of battery A and battery B will be reduced. Summary of the Invention
[0004] This application discloses a method, apparatus, and electronic device for determining the cut-off voltage of a battery, which can avoid reducing the actual usable capacity of the battery.
[0005] To solve the above problems, this application adopts the following technical solutions: In a first aspect, an embodiment of this application discloses a method for determining the cut-off voltage of a battery, including: obtaining target data corresponding to a battery cell, where the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock demand capacity; determining a target cut-off voltage corresponding to the battery based on the target data and a target database, where the target database stores the corresponding relationships among the energy density platform corresponding to the cell, the cathode material of the cell, the cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock.
[0006] Second aspect, an embodiment of the present application discloses a device for determining a battery cut-off voltage, including: an acquisition module, configured to acquire target data corresponding to a battery cell, where the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock demand capacity; a determination module, configured to determine a target cut-off voltage corresponding to the battery based on the target data and a target database, where the target database stores a corresponding relationship among an energy density platform corresponding to the cell, the cathode material of the cell, the cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock.
[0007] Third aspect, an embodiment of the present application provides an electronic device, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.
[0008] Fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.
[0009] Fifth aspect, an embodiment of the present application provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute: the steps of the method described in the first aspect.
[0010] The technical solution adopted by the present application can achieve the following beneficial effects: An embodiment of the present application provides a method for determining a battery cut-off voltage. By acquiring target data corresponding to a battery cell, the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock demand capacity, and then determining a target cut-off voltage corresponding to the battery based on the target data and a target database, where the target database stores a corresponding relationship among an energy density platform corresponding to the cell, the cathode material of the cell, the cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock. Since this solution comprehensively considers the influence of the cathode material of the cell, the cell capacity, and the energy density platform corresponding to the cell on the voltage of the RTC capacity that the battery can provide, therefore, by adopting this solution, the target cut-off voltage matching the target real-time clock demand capacity can be determined quickly and accurately, thereby ensuring the actual use capacity of the battery and avoiding the reduction of the actual use capacity of the battery. Description of the Drawings
[0011] Figure 1Schematic flowchart of a method for determining the cut-off voltage of a battery disclosed in an embodiment of the present application; Figure 2 Partial data schematic diagram of a target database disclosed in an embodiment of the present application; Figure 3 Flowchart of a method for determining the cut-off voltage of a battery disclosed in an embodiment of the present application; Figure 4 Schematic structural diagram of a device for determining the cut-off voltage of a battery disclosed in an embodiment of the present application; Figure 5 Schematic structural diagram of an electronic device disclosed in an embodiment of the present application. Detailed implementation manners
[0012] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.
[0013] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the electrically connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.
[0014] Next, in conjunction with the accompanying drawings, the method, device, and electronic device for determining the cut-off voltage of a battery disclosed in the embodiments of the present application will be described in detail through specific embodiments and their application scenarios.
[0015] The present application discloses a method for determining the cut-off voltage of a battery, Figure 1 which is a schematic flowchart of a method for determining the cut-off voltage of a battery disclosed in an embodiment of the present application. As Figure 1 shown, the method includes the following steps: S120. Obtain target data corresponding to the battery cell, where the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock required capacity.
[0016] It should be noted that the battery in the present application is a battery including an RTC.
[0017] This application obtains the target cathode material of the battery cell, the target capacity of the battery cell, the target energy density (ED) platform corresponding to the battery cell, and the target real-time clock required capacity corresponding to the battery cell.
[0018] S140. Based on the target data and the target database, determine the target cut-off voltage corresponding to the battery, where the target database stores the corresponding relationship among the energy density platform corresponding to the battery cell, the cathode material of the battery cell, the battery cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock.
[0019] In this application, based on the target cathode material, target capacity, target energy density platform, and target real-time clock required capacity of the battery cell, the target cut-off voltage corresponding to the battery can be quickly determined from the target database.
[0020] In this application, the influence of the cathode material of the battery cell, the battery cell capacity, and the energy density platform corresponding to the battery cell on the voltage of the RTC capacity that the battery can provide is comprehensively considered. By adopting the solution of this application, while providing the RTC capacity that meets the requirements, the matching cut-off voltage can be determined to ensure the actual use capacity of the battery and avoid the reduction of the actual use capacity of the battery.
[0021] The embodiment of this application provides a method for determining the battery cut-off voltage. By obtaining the target data corresponding to the battery cell, the target data includes the target cathode material, target capacity, target energy density platform, and target real-time clock required capacity, and then based on the target data and the target database, determine the target cut-off voltage corresponding to the battery. The target database stores the corresponding relationship among the energy density platform corresponding to the battery cell, the cathode material of the battery cell, the battery cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock. Since this solution comprehensively considers the influence of the cathode material of the battery cell, the battery cell capacity, and the energy density platform corresponding to the battery cell on the voltage of the RTC capacity that the battery can provide, therefore, by adopting this solution, the target cut-off voltage matching the target real-time clock required capacity can be determined quickly and accurately, thereby ensuring the actual use capacity of the battery and avoiding the reduction of the actual use capacity of the battery.
[0022] It should be noted that when designing the battery, the more RTC capacity is given, the less the actual use capacity of the battery will be.
[0023] In an embodiment of the present application, determining a target cut-off voltage corresponding to a battery based on target data and a target database may include: determining a target data group from the target database based on a target cathode material, a target energy density platform, and a target capacity, where the target data group includes a corresponding relationship among an energy density platform corresponding to a battery cell, a cathode material of the battery cell, a battery cell capacity, and a corresponding relationship between a battery cut-off voltage and a capacity provided to a real-time clock; and determining a target cut-off voltage corresponding to the battery based on the corresponding relationship between the battery cut-off voltage and the capacity provided to the real-time clock in the target data group and a target real-time clock required capacity.
[0024] Exemplarily, when the target energy density platform is ED700, the target cathode material is LCO, and the target capacity is 5235, by comparing the target energy density platform ED700, the target cathode material LCO, and the target capacity 5235 with the data in the target database as shown in Figure 2 it is possible to determine the second row of data in Figure 2 as the target data group. When the target real-time clock required capacity is 50 mAh, based on the corresponding relationship between the battery cut-off voltage and the capacity provided to the real-time clock in the second row of data in Figure 2 it is possible to determine 3.05 V as the target cut-off voltage corresponding to the battery. Specifically, 25 corresponding to 2.8 V to 2.5 V plus 21.25 corresponding to 3.0 V to 2.8 V plus 5.08 corresponding to 3.05 V to 3.0 V gives 51.33 mAh, which meets the requirement of 50 mAh. Therefore, 3.05 V is determined as the target cut-off voltage corresponding to the battery.
[0025] It should be noted that the corresponding relationship between the battery cut-off voltage and the capacity provided to the real-time clock in the target data group may specifically be the corresponding relationship between each battery cut-off voltage segment and the capacity provided to the real-time clock. Additionally, Figure 2 in the first column, Energy Density is the energy density platform, in the second column, Cathode is the cathode material, in the third column, Cell Vendor is the battery cell vendor, in the fourth column, Cell Mode is the battery cell model, in the fifth column, Capacity to 3.0 V / mAh is the capacity that the battery cell can provide for terminal use when discharging to 3.0 V, and the sixth to twelfth columns are the corresponding relationship between the battery cut-off voltage and the capacity provided to the real-time clock. Figure 2 One row of data in
[0026] In one implementation, the cathode material of the battery cells in the target data group, the energy density platform corresponding to the battery cells, and the battery cell capacity are the same as the target cathode material, the target energy density platform, and the target capacity in the target data, respectively. That is to say, from the target database, a target data group can be determined in which the cathode material of the battery cells is the same as the target cathode material, the battery cell capacity is the same as the target capacity, and the energy density platform is the same as the target energy density platform.
[0027] Exemplarily, when the target energy density platform is ED700, the target cathode material is LCO, and the target capacity is 5235, by comparing the target energy density platform ED700, the target cathode material LCO, and the target capacity 5235 with the data in the target database as shown in Figure 2 it is possible to determine the second row of data in Figure 2 as the target data group, and then based on the correspondence between the battery cut-off voltage and the capacity available for the real-time clock in this target data group, as well as the target real-time clock required capacity, determine the target cut-off voltage corresponding to the battery.
[0028] In one implementation, the cathode material of the battery cells in the target data group is the same as the target cathode material, and the battery cell capacity in the target data group is the capacity in the target battery cell capacities that is closest to the target capacity, where the target battery cell capacities are the battery cell capacities corresponding to the target cathode material in the target database. In the case where there is no battery cell data in the target database in which the cathode material, battery cell capacity, and energy density platform of the battery cells are all the same as the target cathode material, target energy density platform, and target capacity in the target data, the battery cell data closest to them can be determined from the target database in the priority order of the target cathode material, target energy density platform, and target capacity as the target data group.
[0029] Exemplarily, when the target energy density platform is ED700, the target cathode material is LCO, and the target capacity is 3750, by comparing the target cathode material LCO, the target energy density platform ED700, and the target capacity 3750 with the data in the target database as shown in Figure 2 it is possible to determine the third row of data in Figure 2 as the target data group, and then based on the correspondence between the battery cut-off voltage and the capacity available for the real-time clock in this target data group, as well as the target real-time clock required capacity, determine the target cut-off voltage corresponding to the battery.
[0030] For another example, when the target energy density platform is ED800, the target cathode material is LCO, and the target capacity is 3750, by comparing the target cathode material LCO, the target energy density platform ED800, and the target capacity 3750 with the data in the target database as shown in Figure 2Compare the data in the target database shown, and Figure 2 Determine the third row of data in the cell data with the cathode material of LCO in Figure 2 whose cell capacity is closest to 3750 as the target data group. Then, based on the corresponding relationship between the battery cut-off voltage and the capacity available for the real-time clock in the target data group, and the target real-time clock required capacity, determine the target cut-off voltage corresponding to the battery.
[0031] In one implementation, the target data may further include a target supplier. In the target database, there is a corresponding relationship among the energy density platform corresponding to the cell, the cathode material of the cell, the cell supplier, the cell capacity, the battery cut-off voltage, and the capacity available for the real-time clock. That is to say, this application also considers the differences among different suppliers. Based on the target cathode material, target capacity, target energy density platform, target supplier of the battery cell, the target real-time clock required capacity, and the target database, determine the target cut-off voltage corresponding to the battery, which can improve the accuracy of the determined cut-off voltage, and then ensure the actual use capacity of the battery, avoid wasting too much battery capacity for RTC use, and maximize the actual use capacity of the battery as much as possible.
[0032] In the embodiment of this application, before determining the target cut-off voltage corresponding to the battery based on the target data and the target database, it may further include: establishing a target database.
[0033] Moreover, in this application, after establishing the target database, continuously update the target database to improve the accuracy of the determined cut-off voltage.
[0034] As Figure 3 shown, the method for determining the battery cut-off voltage of this application includes the following process: obtain the target data corresponding to the battery cell, where the target data includes the target cathode material, target capacity, target energy density platform, and target real-time clock required capacity. Then, index in the target database whether there is cell data with the same target cathode material, target energy platform, and target capacity. If so, use this cell data as the target data group. Based on the corresponding relationship between the battery cut-off voltage and the capacity available for the real-time clock in the target data group, and the target real-time clock required capacity, determine the target cut-off voltage corresponding to the battery. If not, in the order of priority of the target cathode material, target energy density platform, and target capacity, determine the cell data closest to it in the target database as the target data group. Based on the corresponding relationship between the battery cut-off voltage and the capacity available for the real-time clock in the target data group, and the target real-time clock required capacity, determine the target cut-off voltage corresponding to the battery.
[0035] The method for determining the battery cut-off voltage provided by the embodiments of the present application may be executed by a device for determining the battery cut-off voltage. In the embodiments of the present application, taking the device for determining the battery cut-off voltage executing the method for determining the battery cut-off voltage as an example, the device for determining the battery cut-off voltage provided by the embodiments of the present application is described.
[0036] Figure 4 It is a schematic structural diagram of a device for determining the battery cut-off voltage disclosed in the embodiments of the present application. As Figure 4 shown, the device 400 for determining the battery cut-off voltage includes: an acquisition module 410 and a determination module 420.
[0037] In the present application, the acquisition module 410 is configured to acquire target data corresponding to the battery cell, where the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock required capacity; the determination module 420 is configured to determine a target cut-off voltage corresponding to the battery based on the target data and a target database, where the target database stores the corresponding relationships among the energy density platform corresponding to the cell, the cathode material of the cell, the cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock.
[0038] In one implementation, the determination module 420 determines the target cut-off voltage corresponding to the battery based on the target data and the target database, including: determining a target data group from the target database based on the target cathode material, the target energy density platform, and the target capacity, where the target data group includes the corresponding relationships among the energy density platform corresponding to the cell, the cathode material of the cell, the cell capacity, and the corresponding relationship between the battery cut-off voltage and the capacity that can be provided to the real-time clock; determining the target cut-off voltage corresponding to the battery based on the corresponding relationship between the battery cut-off voltage and the capacity that can be provided to the real-time clock in the target data group and the target real-time clock required capacity.
[0039] In one implementation, the cathode material of the cell in the target data group, the energy density platform corresponding to the cell, and the cell capacity are respectively the same as the target cathode material, the target energy density platform, and the target capacity in the target data.
[0040] In one implementation, the cathode material of the cell in the target data group is the same as the target cathode material, and the cell capacity in the target data group is the capacity in the target cell capacity that is closest to the target capacity, where the target cell capacity is the cell capacity corresponding to the target cathode material in the target database.
[0041] In one implementation, the target data further includes a target supplier, and the target database stores a corresponding relationship among the energy density platform corresponding to the battery cell, the cathode material of the battery cell, the battery cell supplier, the battery cell capacity, the battery cut-off voltage, and the capacity available for the real-time clock, which correspond to each other.
[0042] In one implementation, the above device further includes: a building module, configured to build the target database before determining the target cut-off voltage corresponding to the battery based on the target data and the target database.
[0043] Optionally, as Figure 5 shown, an embodiment of the present application further provides an electronic device 500, including a processor 501 and a memory 502. A program or instruction that can run on the processor 501 is stored on the memory 502. When the program or instruction is executed by the processor 501, it implements each step of the embodiment of the method for determining the battery cut-off voltage as described above, and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.
[0044] It should be noted that the electronic devices in the embodiments of the present application include mobile electronic devices and non-mobile electronic devices.
[0045] An embodiment of the present application further provides a readable storage medium. A program or instruction is stored on the readable storage medium. When the program or instruction is executed by a processor, it implements each process of the embodiment of the method for determining the battery cut-off voltage as described above, and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.
[0046] Among them, the processor is the processor in the electronic device in the above embodiment. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc.
[0047] An embodiment of the present application further provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute: the steps of the method for determining the battery cut-off voltage as described above.
[0048] In the above embodiments of the present application, the differences among the various embodiments are mainly described. As long as the different optimization features among the various embodiments are not contradictory, they can be combined to form a more optimal embodiment. Considering the simplicity of the writing, it will not be elaborated here.
[0049] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.
Claims
1. A method for determining a battery cut-off voltage, characterized in that: include: Obtaining target data corresponding to the battery cell, wherein the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock required capacity; Based on the target data and the target database, a target cutoff voltage corresponding to the battery is determined, wherein the target database stores a correspondence between an energy density platform corresponding to the battery cell, a cathode material of the battery cell, a battery cell capacity, a battery cutoff voltage, and a capacity that can be provided to a real-time clock.
2. The determination method according to claim 1, characterized in that: The step of determining a target cutoff voltage corresponding to the battery based on the target data and a target database includes: Based on the target cathode material, the target energy density platform and the target capacity, a target data group is determined from the target database, wherein the target data group includes a corresponding relationship between an energy density platform corresponding to a battery cell, a cathode material of a battery cell, a battery cell capacity, and a corresponding relationship between a battery cut-off voltage and a capacity that can be provided to a real-time clock; Based on the correspondence between the battery cutoff voltage and the capacity that can be provided to the real-time clock in the target data group and the target real-time clock required capacity, a target cutoff voltage corresponding to the battery is determined.
3. The determination method according to claim 2, characterized in that: The cathode material of the battery cell, the energy density platform corresponding to the battery cell, and the battery cell capacity in the target data group are respectively the same as the target cathode material, the target energy density platform, and the target capacity in the target data.
4. The determination method according to claim 2, characterized in that: The cathode material of the battery cells in the target data group is the same as the target cathode material, and the battery cell capacity in the target data group is the capacity of the target battery cell capacity that is closest to the target capacity, wherein the target battery cell capacity is the battery cell capacity corresponding to the target cathode material in the target database.
5. The determination method according to claim 1, characterized in that: The target data also includes a target supplier, and the target database stores the corresponding relationships among the energy density platform corresponding to the battery cell, the cathode material of the battery cell, the battery cell supplier, the battery cell capacity, the battery cut-off voltage, and the capacity that can be provided to the real-time clock.
6. The determination method according to claim 1, characterized in that: Before determining the target cut-off voltage corresponding to the battery based on the target data and the target database, the method further includes: Create a target database.
7. A device for determining a battery cut-off voltage, characterized in that: include: An acquisition module, used to acquire target data corresponding to the battery cell, wherein the target data includes a target cathode material, a target capacity, a target energy density platform, and a target real-time clock required capacity; A determination module is used to determine a target cutoff voltage corresponding to the battery based on the target data and a target database, wherein the target database stores a corresponding relationship between an energy density platform corresponding to the battery cell, a cathode material of the battery cell, a battery cell capacity, a battery cutoff voltage, and a capacity that can be provided to a real-time clock.
8. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method for determining the cut-off voltage of a battery as claimed in any one of claims 1 to 6 are implemented.
9. A readable storage medium, characterized in that: The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by the processor, the steps of the method for determining the cut-off voltage of a battery as described in any one of claims 1 to 6 are implemented.
10. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute: the steps of the method for determining the battery cut-off voltage as described in any one of claims 1-6.