Method, device and electronic product for calculating battery short circuit current

Abstract

The application discloses a method and device for calculating a short-circuit current of a battery, wherein the method comprises the following steps: acquiring a current state and a current capacity of the battery; determining a first capacity interval according to the current state of the battery; judging whether the current capacity is in the first capacity interval; updating the first capacity as the current capacity when the current capacity is in the first capacity interval; updating a capacity difference value according to the first capacity and an integrated capacity; and calculating the short-circuit current of the battery according to the capacity difference value. According to the method for calculating the short-circuit current of the battery, the change of the first capacity of the battery can be accurately acquired in real time, so that the short-circuit current of the battery can be accurately calculated.

Description

[0001] This application is a divisional application of the invention patent application filed on April 8, 2019, with application number 201910277037.1 and entitled "Method, Apparatus and Electronic Product for Calculating Battery Short-Circuit Current". Technical Field

[0002] This application relates to the field of battery testing technology, and in particular to a method for calculating battery short-circuit current, a device for calculating battery short-circuit current, and an electronic product. Background Technology

[0003] In related technologies, battery short-circuit calculation methods are generally performed under static conditions, where battery parameters (including current, internal resistance, temperature, etc.) are relatively stable. However, during actual use, the battery current often fluctuates depending on changes in output power, making it difficult to accurately calculate the battery short-circuit current using the above methods. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art. Therefore, the first objective of this application is to propose a method for calculating battery short-circuit current, capable of accurately acquiring changes in the battery's initial capacity in real time, thereby enabling accurate calculation of the battery short-circuit current.

[0005] The second objective of this application is to provide a computer-readable storage medium.

[0006] The third objective of this application is to provide a device for calculating the short-circuit current of a battery.

[0007] The fourth objective of this application is to propose an electronic product.

[0008] To achieve the above objectives, a first aspect of this application proposes a method for calculating the short-circuit current of a battery. The method includes: obtaining the current state and current capacity of the battery; determining a first capacity range based on the current state of the battery; determining whether the current capacity is within the first capacity range; updating the first capacity to the current capacity when the current capacity is within the first capacity range; updating the capacity difference based on the first capacity and the integral capacity; and calculating the short-circuit current of the battery based on the capacity difference.

[0009] The method for calculating battery short-circuit current according to embodiments of this application obtains the current state and current capacity of the battery, determines a first capacity range based on the current state of the battery, determines whether the current capacity is within the first capacity range, updates the first capacity to the current capacity when the current capacity is within the first capacity range, updates the capacity difference based on the first capacity and the integral capacity, and calculates the battery short-circuit current based on the capacity difference. Therefore, the change in the battery's first capacity can be obtained accurately in real time, thereby enabling accurate calculation of the battery short-circuit current.

[0010] In addition, the method for calculating the battery short-circuit current according to the above embodiments of this application may also have the following additional technical features:

[0011] According to one embodiment of this application, determining a first capacity range based on the current state of the battery includes: when the battery is currently in a discharging or charging state, determining the first capacity range as a first interval, wherein the first interval is a range in which the impedance change trend of the battery is consistent during discharge.

[0012] According to one embodiment of this application, determining a first capacity range based on the current state of the battery includes: when the battery is currently in a static state, determining the first capacity range as a second range, wherein the second range is a range in which the impedance change trend of the battery is consistent when it is static.

[0013] According to one embodiment of this application, the range of the first interval is [70%, 100%] or [30%, 50%], and the range of the second interval is [0%, 100%].

[0014] According to one embodiment of this application, before updating the capacity difference based on the first capacity and the integrated capacity, the method further includes: detecting the current of the battery and integrating the current of the battery to obtain the integrated capacity of the battery.

[0015] According to one embodiment of this application, updating the capacity difference based on the first capacity and the integral capacity includes: obtaining a current capacity difference based on the first capacity and the integral capacity; and updating the capacity difference to the current capacity difference when the current capacity difference is greater than or equal to a first threshold and the time exceeds a preset time.

[0016] According to one embodiment of this application, calculating the short-circuit current of the battery based on the capacity difference includes: sequentially obtaining a plurality of the capacity differences; calculating an average capacity difference of the plurality of capacity differences; and calculating the short-circuit current of the battery based on the average capacity difference and the corresponding discharge time of the battery.

[0017] To achieve the above objectives, a second aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for calculating battery short-circuit current proposed in the first aspect of this application.

[0018] According to the computer-readable storage medium of the present application embodiment, by executing the above-described method for calculating the battery short-circuit current, the change in the first capacity of the battery can be obtained in real time and accurately, thereby enabling accurate calculation of the battery short-circuit current.

[0019] To achieve the above objectives, a third aspect of this application provides an apparatus for calculating the short-circuit current of a battery, comprising: an acquisition module for acquiring the current state and current capacity of the battery; a determination module for determining a first capacity range based on the current state of the battery; a judgment module for determining whether the current capacity is within the first capacity range; an update module for updating a first capacity to the current capacity when the current capacity is within the first capacity range, and updating a capacity difference based on the first capacity and the integral capacity; and a calculation module for calculating the short-circuit current of the battery based on the capacity difference.

[0020] The apparatus for calculating battery short-circuit current according to embodiments of this application acquires the current state and current capacity of the battery through an acquisition module, determines a first capacity range based on the current state of the battery through a determination module, determines whether the current capacity is within the first capacity range through a judgment module, updates the first capacity to the current capacity if the current capacity is within the first capacity range through an update module, updates the capacity difference based on the first capacity and the integral capacity, and calculates the battery short-circuit current based on the capacity difference through a calculation module. Therefore, the change in the first capacity of the battery can be acquired accurately in real time, thereby enabling accurate calculation of the battery short-circuit current.

[0021] In addition, the apparatus for calculating the short-circuit current of a battery according to the above embodiments of this application may also have the following additional technical features:

[0022] According to one embodiment of this application, when the determining module determines the first capacity range based on the current state of the battery, it is used to determine the first capacity range as a first interval when the battery is currently in a discharging or charging state, wherein the first interval is a range in which the impedance change trend of the battery is consistent during discharge.

[0023] According to one embodiment of this application, when the determining module determines the first capacity range based on the current state of the battery, it is further configured to determine the first capacity range as a second range when the battery is currently in a static state, wherein the second range is a range in which the impedance change trend of the battery is consistent when it is static.

[0024] According to one embodiment of this application, the range of the first interval is [70%, 100%] or [30%, 50%], and the range of the second interval is [0%, 100%].

[0025] According to one embodiment of this application, before the updating module updates the capacity difference based on the first capacity and the integrated capacity, the acquisition module is further configured to: detect the current of the battery and integrate the current of the battery to obtain the integrated capacity of the battery.

[0026] According to one embodiment of this application, when updating the capacity difference based on the first capacity and the integral capacity, the update module is configured to: obtain the current capacity difference based on the first capacity and the integral capacity, and update the capacity difference to the current capacity difference when the current capacity difference is greater than or equal to a first threshold and the time exceeds a preset time.

[0027] According to one embodiment of this application, when the calculation module calculates the short-circuit current of the battery based on the capacity difference, it is used to sequentially obtain a plurality of the capacity differences, calculate the average capacity difference of the plurality of capacity differences, and calculate the short-circuit current of the battery based on the average capacity difference and the corresponding discharge time of the battery.

[0028] To achieve the above objectives, a fourth aspect of this application provides an electronic product, which includes a battery and a device for calculating the short-circuit current of the battery, as proposed in a third aspect of this application.

[0029] The electronic product according to the embodiments of this application can accurately obtain the change in the first capacity of the battery in real time, thereby enabling accurate calculation of the battery short-circuit current. Attached Figure Description

[0030] Figure 1 This is a flowchart of a method for calculating battery short-circuit current according to an embodiment of this application;

[0031] Figure 2a This is a schematic diagram illustrating the impedance variation trend of a battery under different temperature conditions according to a specific embodiment of this application;

[0032] Figure 2b This is a schematic diagram illustrating the impedance variation trend of a battery under different current conditions according to a specific embodiment of this application;

[0033] Figure 2c This is a schematic diagram illustrating the changing trend of battery impedance when the battery cells are different, according to a specific embodiment of this application.

[0034] Figure 3This is a flowchart of a method for calculating battery short-circuit current according to an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of a method for calculating battery short-circuit current according to a specific embodiment of this application;

[0036] Figure 5 This is a block diagram of a device for calculating battery short-circuit current according to an embodiment of this application;

[0037] Figure 6 This is a block diagram of an electronic product according to an embodiment of this application. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0039] The following description, with reference to the accompanying drawings, outlines a method for calculating battery short-circuit current, a computer-readable storage medium, an apparatus for calculating battery short-circuit current, and an electronic product according to embodiments of this application.

[0040] Figure 1 This is a flowchart illustrating a method for calculating battery short-circuit current according to an embodiment of this application. Figure 1 As shown, the method for calculating the battery short-circuit current in this application embodiment may include the following steps:

[0041] S1, obtain the current state and current capacity of the battery.

[0042] Specifically, the battery's state parameters, such as voltage and current, can be obtained, and the current state of the battery can be determined based on the changing trends of these parameters. The current state of the battery can include a discharging state, a charging state, and a resting state. For example, when the battery voltage increases, the current state of the battery can be determined to be a charging state; when the battery voltage decreases, the current state of the battery can be determined to be a discharging state; and when the battery voltage remains constant, the current state of the battery can be determined to be a resting state.

[0043] The current capacity of a battery can be the percentage of its remaining capacity after a period of use or after long-term storage, relative to its total capacity. If the battery capacity is 0, it means that the remaining charge is 0; if the battery capacity is 100%, it means that the battery is fully charged.

[0044] S2, determine the first capacity range based on the current state of the battery.

[0045] According to one embodiment of this application, determining a first capacity range based on the current state of the battery includes: when the battery is currently in a discharging or charging state, determining the first capacity range as a first interval, wherein the first interval is a range in which the impedance change trend of the battery is consistent during discharge.

[0046] According to another embodiment of this application, determining a first capacity range based on the current state of the battery includes: when the battery is currently in a static state, determining the first capacity range as a second range, wherein the second range is a range in which the impedance change trend of the battery is consistent when it is static.

[0047] Preferably, the range of the first interval can be [70%, 100%] or [30%, 50%], and the range of the second interval can be [0%, 100%].

[0048] Specifically, due to the influence of temperature, current and the differences in the battery itself (differences in the cells within the battery), the overall trend of the battery impedance also varies to some extent. However, the local trend of the battery impedance is relatively consistent within a certain range of the battery (i.e., the first capacity range).

[0049] For example, when the battery is currently in a discharging state, such as Figure 2a As shown, the overall trend of battery impedance changes differently under different temperature conditions. However, when the capacity range is [70%, 100%] or [30%, 50%], the local trend of battery impedance change is relatively consistent; for example... Figure 2b As shown, the overall trend of battery impedance changes differently under different current conditions. However, when the capacity range is [70%, 100%] or [30%, 50%], the local trend of battery impedance change is relatively consistent; for example... Figure 2c As shown, when the cells in a battery are different, the overall trend of the battery's impedance change is also different. However, when the capacity range is [70%, 100%] or [30%, 50%], the local trend of the battery's impedance change is relatively stable. Therefore, when the battery is in a discharging state, the first capacity range can be defined as the first interval. The local trend of the battery's impedance change is relatively consistent within this first interval, and the capacity change of the battery can be accurately detected within this first interval. The first interval can be [70%, 100%] or [30%, 50%].

[0050] Furthermore, when the battery is in a static state, the current inside the battery cannot fluctuate. When the capacity range is [0, 100%], the change trend of the battery impedance is relatively consistent. Therefore, the second range can be [0, 100%].

[0051] S3, determine whether the current capacity is within the first capacity range.

[0052] S4, when the current capacity is in the first capacity range, update the first capacity to the current capacity.

[0053] Specifically, when it is determined that the current state of the battery is in a discharging state, if the current capacity of the battery is within the first range, then the first capacity of the battery is updated to the current capacity of the battery. For example, if the current capacity of the battery is 40% and is within the first range [30%, 50%], then the first capacity of the battery is updated to 40%. When it is determined that the current state of the battery is in a resting state, if the current capacity of the battery is within the second range, then the first capacity of the battery is updated to the current capacity of the battery. For example, if the current capacity of the battery is 80% and is within the second range [0%, 100%], then the first capacity of the battery is updated to 80%.

[0054] S5, update the capacity difference based on the first capacity and the integral capacity.

[0055] According to one embodiment of this application, before updating the capacity difference based on the first capacity and the integrated capacity, the method further includes: detecting the current of the battery and integrating the current of the battery to obtain the integrated capacity of the battery.

[0056] The battery current can be detected in real time using a coulomb counter, and the integrated capacity of the battery can be obtained by calculating the integral of the detected battery current over time.

[0057] According to one embodiment of this application, updating the capacity difference based on the first capacity and the integral capacity includes: obtaining the current capacity difference based on the first capacity and the integral capacity; when the current capacity difference is greater than or equal to a first threshold and the time exceeds a preset time, updating the capacity difference to the current capacity difference.

[0058] Specifically, after determining a first capacity range based on the battery's current state and updating the battery's first capacity according to this range, the battery's integral capacity can be obtained. The difference between the battery's integral capacity and the first capacity is then calculated to obtain the current capacity difference. Finally, a determination is made based on the magnitude of this current capacity difference to determine whether to update the capacity difference. If the current capacity difference is greater than or equal to a first threshold (e.g., 10mAh) and the duration exceeds a preset time (e.g., 300s), the capacity difference can be updated to the current capacity difference.

[0059] According to one embodiment of this application, before obtaining the integral capacity, it is also necessary to determine whether the battery meets the conditions for assigning an initial value, that is, to determine whether the battery is in a reset / charge cut-off state, or to determine whether the average current of the battery fluctuates within 50 seconds (i.e., to determine whether the current change amplitude is greater than 150mA), or to determine whether the first capacity of the battery has been updated. If the battery is in a reset / charge cut-off state, or the average current of the battery fluctuates within 50 seconds (i.e., the average current of the battery is not in a steady state within 50 seconds), or the first capacity of the battery has not been updated (the first capacity is not updated in the interval), then an initial value is assigned to the battery as a reference value for obtaining the current capacity and integral capacity of the battery.

[0060] It should be noted that before updating the capacity difference, the decision to update the capacity difference can be made based on the steady-state of the battery's average current within 50 seconds, or the updated state of the battery's first capacity. If the steady-state of the battery's average current within 50 seconds changes from a steady state to an unsteady state (i.e., I-50s steady state-unsteady state) and the duration exceeds a preset time (e.g., 300 seconds); or if the updated state of the battery's first capacity changes from an updated state to an unupdated state (i.e., first capacity update-unupdated state) and the duration exceeds a preset time (e.g., 300 seconds), then the capacity difference will be updated.

[0061] S5 calculates the short-circuit current of the battery based on the capacity difference.

[0062] Specifically, the battery capacity difference ΔSOC is related to the battery's short-circuit current I, that is, Where I is the short-circuit current of the battery, Δt is the discharge time of the battery, and ΔSOC is the capacitance difference of the battery. Therefore, in practical applications, the short-circuit current of the battery can be obtained based on the change in the first capacity of the battery (i.e., the capacity difference of the battery). The accuracy of calculating the short-circuit current of the battery depends on the accuracy of the obtained change in the first capacity of the battery.

[0063] Therefore, in this embodiment of the application, the first capacity range of the battery is determined according to the current state of the battery, and the first capacity of the battery is updated in real time according to the first capacity range and the current capacity, so as to ensure the accuracy of the obtained changes in the first capacity of the battery, that is, to ensure the accuracy of the obtained capacity difference of the battery, so that the short-circuit current of the battery can be accurately calculated based on the capacity difference of the battery.

[0064] Based on the above embodiments, in order to calculate the battery short-circuit current more accurately, one embodiment of this application also proposes a method for calculating the battery short-circuit current based on the battery capacity difference, such as... Figure 3 As shown, the method may include the following steps:

[0065] S301, in turn, obtains multiple capacity differences.

[0066] Specifically, after updating the capacity difference, the updated capacity difference, the corresponding integral capacity, and the first capacity can be stored as a set of data in the difference register. The multiple sets of data in the difference register follow the first-in-first-out principle. That is, the multiple sets of data stored earlier can be retrieved from the difference register in sequence, and the capacity difference corresponding to each set of data can be calculated in sequence to obtain multiple capacity differences.

[0067] For example, such as Figure 4 As shown, the multiple sets of data stored in the difference register in chronological order are data set a, data set b, data set c, and data set d. According to the first-in-first-out principle, the four sets of data stored first, namely data set a, data set b, data set c, and data set d, can be retrieved from the difference register in sequence, and the capacity differences corresponding to these four data sets can be calculated, namely the capacity differences ΔSOC1, ΔSOC2, ΔSOC3, and ΔSOC4.

[0068] S302, calculate the average capacity difference of multiple capacity differences.

[0069] Specifically, after obtaining multiple capacity differences sequentially from the difference register, the smallest and largest capacity differences can be removed, and the remaining capacity differences can be averaged to obtain the average capacity difference.

[0070] For example, suppose the four capacity differences obtained from the difference register are ΔSOC1, ΔSOC2, ΔSOC3, and ΔSOC4, where ΔSOC1 is the largest and ΔSOC4 is the smallest. Then, after removing ΔSOC1 and ΔSOC4, the average capacity difference of the four differences can be calculated. Right now

[0071] S303 calculates the short-circuit current of the battery based on the average capacity difference and the corresponding battery discharge time.

[0072] The battery capacity difference ΔSOC is related to the battery's short-circuit current I, that is, Where I is the short-circuit current of the battery, Δt is the discharge time of the battery, and ΔSOC is the capacity difference of the battery. Therefore, the average capacity difference is calculated from multiple capacity differences. Then, based on the average capacity difference Given the corresponding battery discharge time Δt, calculate the corresponding battery short-circuit current Is, i.e.

[0073] Specifically, in practical applications, when calculating the short-circuit current of a battery based on capacity differences, in order to further improve the accuracy of the calculated short-circuit current, multiple capacity differences can be obtained, and the average capacity difference of the multiple capacity differences can be calculated. The short-circuit current of the battery can then be calculated based on the average capacity difference of the multiple capacity differences and the corresponding battery discharge time, thereby enabling a more accurate calculation of the battery's short-circuit current.

[0074] In summary, the method for calculating battery short-circuit current according to the embodiments of this application obtains the current state and current capacity of the battery, determines a first capacity range based on the current state of the battery, determines whether the current capacity is within the first capacity range, updates the first capacity to the current capacity when the current capacity is within the first capacity range, updates the capacity difference based on the first capacity and the integral capacity, and calculates the battery short-circuit current based on the capacity difference. Therefore, the change in the battery's first capacity can be obtained accurately in real time, thereby enabling accurate calculation of the battery short-circuit current.

[0075] In addition, embodiments of this application also propose a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for calculating the battery short-circuit current.

[0076] According to the computer-readable storage medium of the present application embodiment, by executing the above-described method for calculating the battery short-circuit current, the change in the first capacity of the battery can be obtained in real time and accurately, thereby enabling accurate calculation of the battery short-circuit current.

[0077] Figure 5 This is a block diagram of an apparatus for calculating battery short-circuit current according to an embodiment of this application. Figure 5 As shown, the apparatus for calculating the battery short-circuit current in this application embodiment may include an acquisition module 100, a determination module 200, a judgment module 300, an update module 400, and a calculation module 500.

[0078] The acquisition module 100 is used to acquire the current state and current capacity of the battery; the determination module 200 is used to determine the first capacity range based on the current state of the battery; the judgment module 300 is used to determine whether the current capacity is in the first capacity range; the update module 400 is used to update the first capacity to the current capacity when the current capacity is in the first capacity range, and to update the capacity difference based on the first capacity and the integral capacity; the calculation module 500 is used to calculate the short-circuit current of the battery based on the capacity difference.

[0079] According to one embodiment of this application, when determining the first capacity range based on the current state of the battery, the determining module 200 is used to determine the first capacity range as a first interval when the battery is currently in a discharging or charging state, wherein the first interval is a range in which the impedance change trend of the battery is consistent during discharge.

[0080] According to one embodiment of this application, when determining the first capacity range based on the current state of the battery, the determining module 200 is further configured to determine the first capacity range as a second range when the battery is currently in a static state, wherein the second range is a range in which the impedance change trend of the battery is consistent when it is in a static state.

[0081] According to one embodiment of this application, the range of the first interval is [70%, 100%] or [30%, 50%], and the range of the second interval is [0%, 100%].

[0082] According to one embodiment of this application, before the updating module 400 updates the capacity difference based on the first capacity and the integrated capacity, the acquisition module 100 is further configured to: detect the current of the battery and integrate the current of the battery to obtain the integrated capacity of the battery.

[0083] According to one embodiment of this application, when updating the capacity difference based on the first capacity and the integral capacity, the update module 400 is configured to: obtain the current capacity difference based on the first capacity and the integral capacity, and update the capacity difference to the current capacity difference when the current capacity difference is greater than or equal to a first threshold and the time exceeds a preset time.

[0084] According to one embodiment of this application, when calculating the short-circuit current of the battery based on the capacity difference, the calculation module 500 is used to sequentially obtain multiple capacity differences, calculate the average capacity difference of the multiple capacity differences, and calculate the short-circuit current of the battery based on the average capacity difference and the corresponding battery discharge time.

[0085] It should be noted that for details not disclosed in the apparatus for calculating battery short-circuit current in the embodiments of this application, please refer to the details disclosed in the method for calculating battery short-circuit current in the embodiments of this application, which will not be described in detail here.

[0086] The apparatus for calculating battery short-circuit current according to embodiments of this application acquires the current state and current capacity of the battery through an acquisition module, determines a first capacity range based on the current state of the battery through a determination module, determines whether the current capacity is within the first capacity range through a judgment module, updates the first capacity to the current capacity if the current capacity is within the first capacity range through an update module, updates the capacity difference based on the first capacity and the integral capacity, and calculates the battery short-circuit current based on the capacity difference through a calculation module. Therefore, the change in the first capacity of the battery can be acquired accurately in real time, thereby enabling accurate calculation of the battery short-circuit current.

[0087] Figure 6 This is a block diagram of an electronic product according to an embodiment of this application. Figure 6 As shown, the electronic product 1 in this application embodiment may include the device 10 for calculating the battery short-circuit current and the battery 20 described above.

[0088] The electronic product according to the embodiments of this application can accurately obtain the change in the first capacity of the battery in real time, thereby enabling accurate calculation of the battery short-circuit current.

[0089] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0090] Furthermore, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0093] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0095] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for calculating the short-circuit current of a battery, characterized in that, The method includes: Get the current state and current capacity of the battery; A first capacity range is determined based on the current state of the battery, and the first capacity range is the range in which the impedance change trend of the battery is consistent in the current state. Determine whether the current capacity is within the first capacity range; When the current capacity is within the first capacity range, the first capacity is updated to the current capacity; Update the capacity difference based on the first capacity and the integral capacity, and store the capacity difference in the difference register; The short-circuit current of the battery is calculated based on the capacity difference obtained from the difference register.

2. The method according to claim 1, characterized in that, Determining a first capacity range based on the current state of the battery includes: When the battery is currently in a discharging or charging state, the first capacity range is determined as the first range, wherein the first range is the range in which the impedance change trend of the battery is consistent during discharge.

3. The method according to claim 2, characterized in that, Determining a first capacity range based on the current state of the battery includes: When the battery is currently in a static state, the first capacity range is determined as the second range, wherein the second range is the range in which the impedance change trend of the battery is consistent when it is static.

4. The method according to claim 3, characterized in that, The first interval is [70%, 100%] or [30%, 50%], and the second interval is [0, 100%].

5. The method according to claim 1, characterized in that, Before updating the capacity difference based on the first capacity and the integral capacity, the method further includes: The current of the battery is detected, and the current of the battery is integrated to obtain the integrated capacity of the battery.

6. The method according to claim 5, characterized in that, Update the capacity difference based on the first capacity and the integral capacity, including: The current capacity difference is obtained based on the first capacity and the integral capacity; When the current capacity difference is greater than or equal to the first threshold and the time exceeds a preset time, the capacity difference is updated to the current capacity difference.

7. The method according to claim 1, characterized in that, Calculating the short-circuit current of the battery based on the capacity difference obtained from the difference register includes: Multiple capacity differences are obtained sequentially from the difference register; Calculate the average capacity difference among the multiple capacity differences; The short-circuit current of the battery is calculated based on the average capacity difference and the corresponding discharge time of the battery.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for calculating the battery short-circuit current as described in any one of claims 1-7.

9. A device for calculating the short-circuit current of a battery, characterized in that, The device includes: The acquisition module is used to acquire the current state and current capacity of the battery; The determining module is used to determine a first capacity range based on the current state of the battery, wherein the first capacity range is the range in which the impedance change trend of the battery is consistent in the current state; The determination module is used to determine whether the current capacity is within the first capacity range; The update module is used to update the first capacity to the current capacity when the current capacity is within the first capacity range, and to update the capacity difference based on the first capacity and the integral capacity, and store the capacity difference in the difference register. A calculation module is used to calculate the short-circuit current of the battery based on the capacity difference obtained from the difference register.

10. The apparatus according to claim 9, characterized in that, When determining the first capacity range based on the current state of the battery, the determining module is used to determine the first capacity range as a first interval when the battery is currently in a discharging or charging state, wherein the first interval is a range in which the impedance change trend of the battery is consistent during discharge.

11. The apparatus according to claim 10, characterized in that, When determining the first capacity range based on the current state of the battery, the determining module is further configured to determine the first capacity range as a second range when the battery is currently in a static state, wherein the second range is a range in which the impedance change trend of the battery is consistent when it is in a static state.

12. The apparatus according to claim 11, characterized in that, The first interval is [70%, 100%] or [30%, 50%], and the second interval is [0, 100%].

13. The apparatus for calculating the short-circuit current of a battery according to claim 9, characterized in that, Before the update module updates the capacity difference based on the first capacity and the integral capacity, the acquisition module is further configured to: The current of the battery is detected, and the current of the battery is integrated to obtain the integrated capacity of the battery.

14. The apparatus according to claim 13, characterized in that, When updating the capacity difference based on the first capacity and the integral capacity, the update module is used to: obtain the current capacity difference based on the first capacity and the integral capacity, and update the capacity difference to the current capacity difference when the current capacity difference is greater than or equal to a first threshold and the time exceeds a preset time.

15. The apparatus according to claim 9, characterized in that, When calculating the short-circuit current of the battery based on the capacity difference, the calculation module is used to sequentially obtain multiple capacity differences from the difference register, calculate the average capacity difference of the multiple capacity differences, and calculate the short-circuit current of the battery based on the average capacity difference and the corresponding discharge time of the battery.

16. An electronic product, characterized in that, The electronic product includes a battery and a device for calculating the short-circuit current of the battery as described in any one of claims 9-15.

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