Battery output current adjusting method and device, vehicle and storage medium

Abstract

The invention provides a battery output current adjusting method and device, a vehicle and a storage medium, the method is applied to the field of vehicles, and the method comprises the steps that the current allowable current of a battery and the temperature associated with an electrical part are obtained; wherein the current allowable current is the maximum current allowed to be output by the battery; acquiring the duration of the current allowable current in a preset current interval; according to the temperature and the duration, the correction multiplying power of the current allowable current is determined; and according to the correction multiplying power, correcting the current allowable current to obtain the corrected allowable current. According to the method, the performance loss of the battery can be reduced, the capacity of the battery can be better exerted, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and more specifically, to a method, device, vehicle, and storage medium for adjusting the output current of a battery in the field of vehicles. Background Art

[0002] Since the current-carrying capacity of current electrical components is affected by various factors such as temperature, material, cross-sectional area, and heat dissipation, and the output capacity of the battery is also affected by the remaining power and the temperature of the battery cells, when the battery charges the electrical components, it may result in a situation of losing some battery performance. Therefore, how to better utilize the capabilities of the battery has become an urgent problem to be solved currently. Summary of the Invention

[0003] The present application provides a method, device, vehicle, and storage medium for adjusting the output current of a battery. This method can reduce the performance loss of the battery, enabling better utilization of the battery's capabilities and extending the service life of the battery.

[0004] In a first aspect, a method for adjusting the output current of a battery is provided. The method includes: obtaining the current allowable current of the battery and the temperature associated with the electrical component; wherein, the current allowable current is the maximum current that the battery is allowed to output; obtaining the duration for which the current allowable current is within a preset current range; determining a correction factor for the current allowable current based on the temperature and the duration; and correcting the current allowable current according to the correction factor to obtain a corrected allowable current.

[0005] The above technical solution combines multiple factors such as the current allowable current of the battery, the temperature associated with the electrical component, and the duration for which the current allowable current is within a preset current range to determine the correction factor for the current allowable current, which can enable the correction factor to more comprehensively reflect the actual working state of the battery and the electrical component. Correcting the current allowable current according to the correction factor to obtain a corrected allowable current can more accurately control the output current of the battery, reduce the performance loss caused by excessive output current of the battery, enable better utilization of the battery's capabilities, and extend the service life of the battery.

[0006] In combination with the first aspect, in some possible implementation manners, after obtaining the current allowable current of the battery and the temperature associated with the electrical component, it further includes: determining whether the current allowable current is greater than the maximum load current of the electrical component; and the determining the correction factor for the current allowable current based on the temperature and the duration includes: if it is determined that the current allowable current is greater than the maximum load current, then determining the correction factor for the current allowable current based on the temperature and the duration.

[0007] In the above technical solution, by determining whether the current allowable current is greater than the maximum carrying current of the electrical component, it can be known whether the battery output current will cause an overload risk to the electrical component. If it is determined that the current allowable current is greater than the maximum carrying current of the electrical component, then further according to the temperature and the duration for which the current allowable current is within the preset current range, the correction factor of the current allowable current is determined, which is beneficial to correcting the battery output current at an appropriate time, so as to ensure that the battery output current will neither exceed the carrying capacity of the electrical component nor affect the normal operation of the electrical component due to too small an output current.

[0008] Combined with the first aspect and the above implementation, in some possible implementations, the determining the correction factor of the current allowable current according to the temperature and the duration includes: querying a preset corresponding relationship according to the temperature and the duration to obtain the correction factor of the current allowable current; wherein, the corresponding relationship is used to describe the relationship between different combinations of the temperature and the duration and the correction factor.

[0009] In the above technical solution, by presetting the corresponding relationship, it is possible to dynamically determine the correction factor according to the temperature associated with the electrical component and the duration for which the current allowable current is within the preset current range. This way of determining the correction factor by querying the corresponding relationship can improve the efficiency of determining the correction factor.

[0010] Combined with the first aspect and the above implementation, in some possible implementations, in the preset corresponding relationship, when the duration remains unchanged, the temperature and the correction factor are negatively correlated, and when the temperature remains unchanged, the duration and the correction factor are negatively correlated.

[0011] Combined with the first aspect and the above implementation, in some possible implementations, after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, it further includes: determining whether the corrected allowable current meets a preset recovery condition; if the preset recovery condition is met, then controlling the corrected allowable current to be restored to the allowable current before correction.

[0012] In the above technical solution, on the basis of correcting the current allowable current according to the correction factor to obtain the corrected allowable current, the judgment of the preset recovery condition is further introduced, so that it is possible to automatically determine whether the corrected allowable current meets the recovery condition after the corrected allowable current is applied for a period of time. If the condition is met, the corrected allowable current is restored to the allowable current before correction, so as to ensure that the battery can restore its original current output capacity.

[0013] Combined with the first aspect and the above implementation manners, in some possible implementation manners, determining whether the corrected allowable current meets a preset recovery condition includes: obtaining the duration for which the correction factor is maintained; determining whether the duration is greater than or equal to a preset duration threshold; if it is determined that the duration is greater than or equal to the preset duration threshold, determining that the corrected allowable current meets the preset recovery condition.

[0014] In the above technical solution, when determining whether the corrected allowable current meets the preset recovery condition, the duration for which the correction factor is maintained is introduced as a judgment basis. By obtaining this time period and comparing it with the preset duration threshold, it can be determined whether the corrected allowable current has been stable and continuous for a sufficient time, so as to decide whether it meets the recovery condition. When it is determined that the duration is greater than or equal to the preset duration threshold, it is determined that the corrected allowable current meets the preset recovery condition, and then the corrected allowable current is controlled to be restored to the allowable current before correction, ensuring that the battery can restore its original current output capacity.

[0015] Combined with the first aspect and the above implementation manners, in some possible implementation manners, after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, it further includes: adjusting the current output power of the battery according to the corrected allowable current to obtain an adjusted output power; controlling the battery to charge the electrical component according to the adjusted output power.

[0016] In the above technical solution, after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, the current output power of the battery is further adjusted according to the corrected allowable current to obtain an adjusted output power, so as to dynamically adjust the output power of the battery according to the magnitude of the corrected allowable current, thereby ensuring that the electrical component can be charged under safe and efficient conditions and avoiding damage to the electrical component due to excessive current during charging.

[0017] In a second aspect, an adjustment device for the output current of a battery is provided. The device includes: a first acquisition module, configured to acquire the current allowable current of the battery and the temperature associated with the electrical component, where the current allowable current is the maximum current allowed to be output by the battery; a second acquisition module, configured to acquire the duration for which the current allowable current is within a preset current range; a determination module, configured to determine the correction factor of the current allowable current according to the temperature and the duration; and a correction module, configured to correct the current allowable current according to the correction factor to obtain the corrected allowable current.

[0018] In combination with the second aspect, in some implementations of the second aspect, the device further includes a first determination module, specifically configured to: after obtaining the current allowable current of the battery and the temperature associated with the electrical component, further include: determining whether the current allowable current is greater than the maximum carrying current of the electrical component; the step of determining the correction factor of the current allowable current according to the temperature and the duration includes: if it is determined that the current allowable current is greater than the maximum carrying current, then determining the correction factor of the current allowable current according to the temperature and the duration.

[0019] In combination with the second aspect and the above implementation, in some implementations of the second aspect, the determination module is specifically configured to: the step of determining the correction factor of the current allowable current according to the temperature and the duration includes: querying a preset correspondence according to the temperature and the duration to obtain the correction factor of the current allowable current; wherein, the correspondence is used to describe the relationship between different combinations of the temperature and the duration and the correction factor.

[0020] In combination with the second aspect and the above implementation, in some implementations of the second aspect, in the preset correspondence, when the duration remains unchanged, the temperature is negatively correlated with the correction factor, and when the temperature remains unchanged, the duration is negatively correlated with the correction factor.

[0021] In combination with the second aspect and the above implementation, in some implementations of the second aspect, the device further includes a second determination module, specifically configured to: after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, further include: determining whether the corrected allowable current meets a preset recovery condition; if the preset recovery condition is met, then controlling the corrected allowable current to be restored to the allowable current before correction.

[0022] In combination with the second aspect and the above implementation, in some implementations of the second aspect, the second determination module is specifically configured to: the step of determining whether the corrected allowable current meets a preset recovery condition includes: obtaining the duration for which the correction factor is maintained; determining whether the duration is greater than or equal to a preset duration threshold; if it is determined that the duration is greater than or equal to the preset duration threshold, then determining that the corrected allowable current meets the preset recovery condition.

[0023] Combined with the second aspect and the above implementation manners, in some implementation manners of the second aspect, the control module is specifically configured to: after correcting the current allowable current according to the correction magnification to obtain the corrected allowable current, further include: adjusting the current output power of the battery according to the corrected allowable current to obtain the adjusted output power; controlling the battery to charge the electrical component according to the adjusted output power.

[0024] In a third aspect, a vehicle is provided, including a memory and a processor. The memory is used to store executable program codes, and the processor is used to call and run the executable program codes from the memory, so that the vehicle executes the method in the first aspect or any possible implementation manner of the first aspect.

[0025] In a fourth aspect, a computer program product is provided, including: computer program codes, when the computer program codes are run on a computer, enabling the computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

[0026] In a fifth aspect, a computer-readable storage medium is provided, storing computer program codes, when the computer program codes are run on a computer, enabling the computer to execute the method in the first aspect or any possible implementation manner of the first aspect. Description of the Drawings

[0027] Figure 1 is a schematic flowchart of a method for adjusting the output current of a battery provided by an embodiment of the present application;

[0028] Figure 2 is a schematic diagram for determining the corrected output current provided by an embodiment of the present application;

[0029] Figure 3 is a schematic flowchart of another method for adjusting the output current of a battery provided by an embodiment of the present application;

[0030] Figure 4 is a schematic flowchart of a third method for adjusting the output current of a battery provided by an embodiment of the present application;

[0031] Figure 5 is a schematic structural diagram of a device for adjusting the output current of a battery provided by an embodiment of the present application;

[0032] Figure 6 is a schematic structural diagram of a vehicle provided by an embodiment of the present application. Detailed Embodiments

[0033] The technical solutions in the present application will be clearly and elaborately described below in conjunction with the accompanying drawings. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B. The "and / or" in the text is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0034] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] For the convenience of understanding the embodiments of the present application, the technical terms involved in the embodiments of the present application will be explained below first.

[0036] Currently, when selecting electrical components, various factors such as the maximum power requirement of the entire vehicle and cost usually need to be considered, and the output capacity of the battery is usually obtained through experimental tests based on battery performance. However, for the same type of battery without adjusting the hardware, there is a lack of a strategy for dynamically matching the output capacity of the battery with the selection of electrical components.

[0037] Specifically, the current-carrying capacity of current electrical components is affected by various factors such as temperature, material, cross-sectional area, and heat dissipation conditions, and the output capacity of the battery is also affected by the remaining power and the temperature of the battery cells. Therefore, when the battery charges the electrical components, there is usually a situation where the maximum current output by the battery is lower than the current-carrying capacity of the electrical components, and at this time, the battery will lose some performance. Therefore, how to better utilize the capabilities of the battery cells has become an urgent problem to be solved currently.

[0038] To at least solve the above problems, the embodiments of the present application provide a method for adjusting the output current of a battery, which is applied to a vehicle. This method can reduce the performance loss of the battery, enabling better utilization of the battery's capabilities and extending the service life of the battery.

[0039] Figure 1 is a schematic flowchart of a method for adjusting the output current of a battery provided by the embodiments of the present application.

[0040] Exemplarily, as Figure 1 shown, the method 100 includes:

[0041] Step 101, obtain the current allowable current of the battery and the temperature associated with the electrical component; where the current allowable current is the maximum current that the battery is allowed to output.

[0042] Step 102: Obtain the duration for which the current allowable current is within a preset current range.

[0043] Step 103: Determine the correction factor of the current allowable current according to the temperature and the duration.

[0044] Step 104: Correct the current allowable current according to the correction factor to obtain the corrected allowable current.

[0045] In the embodiment of the present application, by combining multiple factors such as the current allowable current of the battery, the temperature associated with the electrical component, and the duration for which the current allowable current is within the preset current range, the correction factor of the current allowable current is determined, which can enable the correction factor to more comprehensively reflect the actual working state of the battery and the electrical component. Correcting the current allowable current according to the correction factor to obtain the corrected allowable current can more accurately control the output current of the battery, reduce the performance loss caused by the excessive output current of the battery, enable the battery to better exert its capabilities, and extend the service life of the battery.

[0046] The following specifically describes Figure 1 the implementation manners of each step in the embodiments shown.

[0047] For step 101, it can be understood that the current allowable current of the above battery refers to the maximum current that the battery allows to output. Generally, this value will change with various factors such as the working state of the battery, the ambient temperature, and the health state of the battery.

[0048] The maximum current that the above battery allows to output can usually be obtained by referring to the battery specification provided by the battery manufacturer. Since the maximum current that the battery allows to output will change with factors such as the chemical reaction inside the battery and the temperature, professional devices such as ammeters or Hall effect sensors can be considered to continuously monitor the change of the maximum current. For the convenience of description below, C0 will be used to represent the current allowable current.

[0049] The temperature associated with the above electrical component may include the ambient temperature at which the electrical component is located during operation, which directly affects the current-carrying capacity of the electrical component. In order to more accurately evaluate and adjust the current-carrying capacity of the electrical component, the Battery Management System (BMS) will continuously monitor the ambient temperature data and use it as an important reference for adjusting the output power of the battery. In addition, the temperature associated with the above electrical component may also include the ambient temperature where the electrical component is located, the temperature of the battery cell of the battery charging the electrical component, the temperature of the charging socket supplying power to the electrical component, and the temperature of the coolant inside the electrical component. The above temperatures can all be obtained through temperature sensors.

[0050] For step 102, it can be understood that multiple current thresholds are preset, and the above-mentioned multiple current thresholds are monotonically decreasing. By comparing the magnitude relationship between the current allowable current C0 and the multiple current thresholds, the current interval where the current allowable current is located is determined, which is the preset current interval mentioned above.

[0051] In some embodiments, multiple current intervals are pre-constructed according to multiple preset current thresholds. After obtaining the current allowable current, the magnitude of the current allowable current is compared with the multiple current thresholds to determine the current interval where the current allowable current is located. The above-mentioned multiple current intervals cover all possible current values of the current allowable current to ensure that the current allowable current must be in one of the multiple current intervals.

[0052] Exemplarily, it is assumed that 3 current thresholds are preset, which are A1, A2, and A3 respectively, and A1 > A2 > A3. The current intervals formed by the above 3 current thresholds are: [A1, +∞), [A2, A1), [A3, A2), and (0, A3).

[0053] When determining the preset current interval where C0 is located, it can be determined by the following method:

[0054] If A1 ≤ C0, it is determined that C0 is in the current interval of [A1, +∞), and at this time the preset current interval mentioned above is [A1, +∞);

[0055] If A2 ≤ C0 < A1, it is determined that C0 is in the current interval of [A2, A1), and at this time the preset current interval mentioned above is [A2, A1);

[0056] If A3 ≤ C0 < A2, it is determined that C0 is in the current interval of [A3, A2), and at this time the preset current interval mentioned above is [[A3, A2);

[0057] If C0 < A3, it is determined that C0 is in the current interval of (0, A3), and at this time the preset current interval mentioned above is (0, A3).

[0058] Considering that the current allowable current changes with the remaining battery power and battery temperature, in this case, if the duration of the current allowable current is directly obtained, even a slight current change will trigger an adjustment of the current allowable current. There may be a situation where the duration is frequently determined and the duration is short, resulting in multiple determinations of the correction factor and thus multiple adjustments to the current allowable current. For example, assume the current allowable current is 200A. When the current allowable current changes from 200A to 200.1A, at this time, a short duration of the current allowable current (i.e., the duration of 200A) will be obtained, thereby triggering an adjustment of the current allowable current. To avoid frequent adjustments of the current allowable current caused by slight current changes, it is possible to consider pre-constructing current intervals. When determining the current interval where the current allowable current is located, obtain the duration of the current allowable current within the current interval. At this time, the duration is relatively long, so the number of times of determining the duration can be reduced, and the situation of short duration can be reduced, thus avoiding multiple determinations of the correction factor and further reducing the number of adjustments to the current allowable current. However, if only a single current interval is constructed, there will be a situation where the current allowable current is not within the single current interval or the current allowable current remains in the single current interval for a long time, resulting in the problem of difficult timely correction. For example, when the current allowable current is not within the single current interval and the current allowable current is large, the duration of the current allowable current within the single current interval cannot be obtained, so the correction factor cannot be determined, and thus the current allowable current cannot be corrected in time, affecting the service life of the battery. Therefore, it is considered to construct multiple current intervals so that the above multiple current intervals can cover as many current values of the current allowable current as possible, which can not only avoid frequent adjustments of the current allowable current but also avoid difficult timely adjustments of the current allowable current to ensure correction at an appropriate time and extend the service life of the battery.

[0059] In addition, take the moment when the preset current interval where C0 is located is determined as the start moment, and calculate the duration of C0 in the preset current interval starting from the start moment. For the sake of convenience of narration below, T0 will be used to refer to the above start moment.

[0060] Regarding step 103, it can be understood that the correction factor of C0 is determined according to the temperature associated with the electrical component and the duration of C0 in the preset current interval.

[0061] Before determining the correction factor of C0, to avoid frequent acquisition of the correction factor, it is possible to consider setting limiting conditions. When the limiting conditions are met, then determine the correction factor of C0 according to the temperature associated with the electrical component and the duration of C0 in the preset current interval.

[0062] The above-mentioned limiting conditions can be determined by the magnitude relationship between the current allowed currently and the maximum current-carrying capacity of the electrical component, specifically including: determining whether the current allowed currently is greater than the maximum current-carrying capacity of the electrical component, or determining whether the absolute value of the difference between the current allowed currently and the maximum current-carrying capacity is less than or equal to a preset current threshold. That is to say, when the current allowed currently is greater than the maximum current-carrying capacity, or when the current allowed currently is close to the maximum current-carrying capacity, the above-mentioned limiting conditions are satisfied.

[0063] In some embodiments, after obtaining the current allowed current of the battery and the temperature associated with the electrical component, it further includes: determining whether the current allowed currently is greater than the maximum current-carrying capacity of the electrical component; determining the correction factor of the current allowed currently according to the temperature and the duration, including: if it is determined that the current allowed currently is greater than the maximum current-carrying capacity, then determining the correction factor of the current allowed currently according to the temperature and the duration.

[0064] It can be understood that the maximum current-carrying capacity of the above-mentioned electrical component refers to the maximum current value that the electrical component can withstand, and this maximum current value can usually be obtained through experimental tests. At the same time, this value is also an important basis for the design and selection of electrical components, and is also one of the key factors that need to be considered when the BMS dynamically adjusts the output current of the battery. In practical applications, the BMS will dynamically adjust the output of the current allowed by the battery according to the maximum current-carrying capacity of the electrical component and other relevant factors to ensure the safety and performance of the battery.

[0065] If it is determined that the current allowed currently is greater than the maximum current-carrying capacity, it means that the output ability of the battery is higher than the current-carrying ability of the electrical component. At this time, it is necessary to correct the current allowed currently so that the output ability of the battery is lower than the current-carrying ability of the electrical component, which can avoid damage to the electrical component and reduce the performance loss of the battery at the same time.

[0066] If it is determined that the current allowed currently is less than or equal to the maximum current-carrying capacity, it means that the output ability of the battery is lower than or exactly meets the current-carrying ability of the electrical component. At this time, there is no need to correct the current allowed currently, and the output can continue according to the current allowed currently.

[0067] The above technical solution can correct the output current of the battery at an appropriate time, so as to ensure that the output current of the battery neither exceeds the carrying capacity of the electrical component nor affects the normal operation of the electrical component due to too small output current.

[0068] In some other embodiments, if it is determined that the current allowable current is greater than the maximum carrying current, the correction factor of the current allowable current is determined according to the temperature and the duration, including: when it is determined that the current allowable current is greater than the maximum carrying current, the duration for which the current allowable current is greater than the maximum carrying current is obtained; if the duration for which the current allowable current is greater than the maximum carrying current is greater than a preset duration, the correction factor of the current allowable current is determined according to the temperature and the duration.

[0069] It can be understood that the above preset duration can be pre-calibrated and used to measure whether the correction factor can be determined according to the temperature and the duration. Optionally, the above preset duration can be pre-calibrated to 2 seconds.

[0070] When the current allowable current is greater than the maximum carrying current and lasts for more than 2 seconds, determining the correction factor of the current allowable current according to the temperature and the duration can avoid determining unnecessary correction factors.

[0071] In some embodiments, determining the correction factor of the current allowable current according to the temperature and the duration includes: querying a preset correspondence according to the temperature and the duration to obtain the correction factor of the current allowable current; wherein the correspondence is used to describe the relationship between different combinations of temperature and duration and the correction factor.

[0072] It can be understood that the above preset correspondence is pre-set and used to describe the relationship between different combinations of temperature and duration and the correction factor. According to each combination of temperature and duration, querying the above preset correspondence can obtain a correction factor of the current allowable current.

[0073] By the above technical solution, determining the correction factor by querying the preset correspondence can improve the efficiency of determining the correction factor.

[0074] In some embodiments, in the preset correspondence, when the duration remains unchanged, the temperature and the correction factor are negatively correlated; when the temperature remains unchanged, the duration and the correction factor are negatively correlated.

[0075] It can be understood that in the above preset correspondence, when the duration remains unchanged, as the temperature continuously increases, the heat dissipation capacity of the electrical component will continuously decrease, resulting in a corresponding decrease in the current-carrying capacity of the electrical component. Therefore, it can be considered to reduce the output current of the battery, that is, reduce the correction factor, to improve the heat dissipation capacity of the electrical component. Therefore, when the duration remains unchanged, the higher the temperature, the smaller the correction factor.

[0076] In the above preset correspondence, when the temperature remains unchanged, as the duration increases, the heat generated during the operation of the electrical component gradually increases, resulting in a decrease in the current-carrying capacity of the electrical component. To reduce the heat, it is possible to consider reducing the output current of the battery, that is, reducing the correction factor, to restore the current-carrying capacity of the electrical component. Therefore, when the temperature remains unchanged, the longer the duration, the smaller the correction factor.

[0077] In some embodiments, the above preset correspondence can be represented by a preset correspondence table, which can be pre-calibrated. The above preset correspondence table is shown in Table 1 below.

[0078] Table 1

[0079]

[0080] The data in the above preset correspondence table are all exemplary explanations for easy understanding and do not represent real data. For example, the above X11 represents the correction factor X in the first row and the first column of Table 1, that is, the correction factor X11 when the duration t is in (0, T1] and the temperature is -20°C. The above X94 represents the correction factor X in the ninth row and the fourth column of Table 1, that is, the correction factor X94 when the duration t is in [T3, +∞) and the temperature is 20°C.

[0081] In the process of establishing the above preset correspondence table, a mathematical model of the current-carrying capacity, duration, and temperature of the electrical component can be established. In practical applications, the correction factor under different combinations of temperature and duration can be obtained through this mathematical model. This method can achieve dynamic adjustment of the allowable current of the battery, help improve the safety and performance of the battery, and extend the service life of the battery.

[0082] When establishing the mathematical model, the following steps need to be executed:

[0083] First, simulate the charge and discharge processes of the battery at different temperatures and different durations through a series of designed experiments, and monitor and record the output current of the battery in real time.

[0084] Second, for each experimental data point, divide the recorded output current by the current allowable current to obtain a ratio. This ratio reflects the relative relationship between the actual output current and the allowable current of the battery at the current temperature and duration. Since multiple data points are obtained during the experiment, multiple ratios will be obtained, and these ratios can be used to establish a mathematical model to describe the relationship between the current-carrying capacity, duration, temperature, and correction factor of the electrical component.

[0085] Third, use statistical software or mathematical tools to fit the experimental data to obtain a mathematical model that describes the relationship among the current-carrying capacity, duration, temperature, and correction factor of the electrical component; this mathematical model can be presented in the form of a table or in the form of a functional relationship.

[0086] The above preset correspondence table includes three duration thresholds, namely T1, T2, and T3, and T1 < T2 < T3. The duration intervals composed of the above three duration thresholds are: (0, T1], (T1, T2], (T2, T3], and (T3, +∞).

[0087] When determining the duration interval in which the duration t is located, it can be determined by the following method:

[0088] If 0 < t ≤ T1, it is determined that the duration t is in the duration interval of (0, T1];

[0089] If T1 < t ≤ T2, it is determined that the duration t is in the duration interval of (T1, T2];

[0090] If T2 < t ≤ T3, it is determined that the duration t is in the duration interval of (T2, T3];

[0091] If t > T3, it is determined that the duration t is in the duration interval of (T3, +∞).

[0092] In Table 1 above, the correction factor X is obtained by looking up the table according to the temperature and duration. Exemplarily, when the temperature is 3°C and the duration t is in the interval (0, T1], since the correction factor for a temperature of 3°C and a duration t in the interval (0, T1] is not directly stated in Table 1, at this time, the table can be looked up nearby. Among the temperatures in Table 1, since the absolute value of the difference between 3°C and 5°C is the smallest, the correction factor for a temperature of 5°C and a duration t in the interval (0, T1] is determined as the correction factor for a temperature of 3°C and a duration t in the interval (0, T1]. That is to say, when the temperature is 3°C and the duration t is in the interval (0, T1], the correction factor is X61, and the above X61 refers to the correction factor in the 6th row and 1st column of Table 1.

[0093] When the temperature is 5°C and the duration t is in the interval (T1, T2], since the correction factor for a temperature of 5°C and a duration t in the interval (T1, T2] is directly stated in Table 1, there is no need to look up the table nearby at this time, and the correction factor for a temperature of 5°C and a duration t in the interval (T1, T2] can be directly queried from Table 1. This correction factor is X62, and the above X62 refers to the correction factor in the 6th row and 2nd column of Table 1.

[0094] In Table 1 above, when the duration remains unchanged, the temperature is negatively correlated with the correction factor. For example, when the duration t is in the range of (T2, T3], as the temperature continuously increases, the correction factor X gradually decreases, that is, it gradually decreases from X13 to X93. When the temperature remains unchanged, the duration is negatively correlated with the correction factor. For example, when the temperature is 0 °C, as the duration continuously increases, the correction factor X gradually decreases, that is, it gradually decreases from X51 to X54.

[0095] Regarding step 104, it can be understood that the product of the current allowable current C0 and the correction factor X is calculated to obtain the corrected allowable current.

[0096] Figure 2 It is a schematic diagram for determining the corrected output current provided by an embodiment of the present application. As Figure 2 shown, first, the current allowable current C0 is determined according to the remaining battery charge (State of Charge, SOC) and the battery cell temperature.

[0097] Secondly, when C0 is greater than or equal to 180 A and lasts for more than 2 s, the preset current interval where C0 is located is determined; the calibration value of 180 A can be used to represent the maximum load current of the electrical component. C0 being greater than or equal to 180 A means that C0 is greater than or equal to the maximum load current of the electrical component. At this time, determining the current interval where C0 is located can effectively avoid frequent determination of the current interval.

[0098] Then, the Real-Time Clock (RTC) is used to record the duration of C0 in the preset current interval, and the correction factor X is determined according to the preset corresponding relationship.

[0099] Finally, the product of the correction factor X and C0 is calculated to obtain the corrected allowable current.

[0100] In some embodiments, after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, it further includes: adjusting the current output power of the battery according to the corrected allowable current to obtain the adjusted output power; controlling the battery to charge the electrical component according to the adjusted output power.

[0101] It can be understood that after obtaining the corrected allowable current, the output power of the battery is adjusted according to the corrected allowable current to obtain the adjusted output power, and the battery is controlled to charge the electrical component according to the adjusted output power, so that the output ability of the battery matches the current-carrying ability of the electrical component.

[0102] However, if the battery outputs current according to the corrected allowable current for a long time, not only can the current output ability of the battery not be exerted, but also the working efficiency of the electrical components will be affected. Therefore, it is possible to consider setting a recovery condition. When the recovery condition is met, the original current output ability of the battery is restored to ensure that the working efficiency of the electrical components is not affected.

[0103] The above technical solution can dynamically adjust the output power of the battery according to the magnitude of the corrected allowable current, thereby ensuring that the electrical components can be charged under safe and efficient conditions and avoiding damage to the electrical components due to excessive current during the charging process.

[0104] In some embodiments, after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, it further includes: determining whether the corrected allowable current meets a preset recovery condition; if the preset recovery condition is met, controlling the corrected allowable current to be restored to the allowable current before correction.

[0105] It can be understood that the above preset recovery condition is intended to measure whether to restore the corrected allowable current to the allowable current before correction to restore the original current output ability of the battery.

[0106] In some embodiments, determining whether the corrected allowable current meets a preset recovery condition includes: obtaining the duration for which the correction factor is maintained; determining whether the duration is greater than or equal to a preset duration threshold; if it is determined that the duration is greater than or equal to the preset duration threshold, it is determined that the corrected allowable current meets the preset recovery condition.

[0107] It can be understood that the above preset duration threshold can be calibrated in advance and is used to determine whether the preset recovery condition is met. Starting from the moment when the correction factor is determined, the duration for which the correction factor is maintained is determined. If the duration is greater than or equal to the preset duration threshold, it means that the battery has output current according to the corrected allowable current for a long time. At this time, in order to restore the corrected allowable current to the allowable current before correction, it can be determined that the corrected current meets the preset recovery condition to restore the original current output ability of the battery.

[0108] If the duration is less than the preset duration threshold, the current is still output according to the corrected allowable current, and it is continuously determined whether the duration is greater than or equal to the preset duration threshold.

[0109] The above preset recovery condition is determined by judging the magnitude relationship between the duration for which the correction factor is maintained and the preset duration threshold. In practical applications, it can also be determined by other means, specifically including:

[0110] In some embodiments, determining whether the corrected allowable current meets the preset recovery condition includes: if the corrected allowable current is less than or equal to the minimum operating current of the electrical component, it is determined that the corrected current meets the preset recovery condition.

[0111] It can be understood that the minimum operating current of the above electrical component refers to the lowest current that meets the operating requirements of the electrical component, and this minimum operating current can usually be obtained by referring to the specification sheet of the electrical component.

[0112] If the corrected allowable current is less than or equal to the minimum operating current of the electrical component, the corrected allowable current needs to be immediately restored to the allowable current before correction to avoid affecting the operation of the electrical component; however, if the corrected allowable current is greater than the minimum operating current of the electrical component, it means that the corrected allowable current can meet the operating requirements of the electrical component, and at this time, there is no need to immediately perform the restoration, and the battery can continue to be controlled to output according to the corrected allowable current.

[0113] Figure 3 It is a schematic flowchart of another method for adjusting the output current of the battery provided by the embodiments of the present application.

[0114] Exemplarily, as Figure 3 shown, the method 300 includes:

[0115] Step 301, obtain the current allowable current of the battery and the temperature associated with the electrical component.

[0116] Step 302, determine whether the current allowable current is greater than the maximum carrying current of the electrical component. If so, execute step 303, otherwise execute step 308.

[0117] Step 303, obtain the duration for which the current allowable current is within the preset current range.

[0118] Step 304, query the preset correspondence according to the temperature and the duration to determine the correction factor of the current allowable current.

[0119] It can be understood that in the case where the current allowable current of the battery is greater than the maximum carrying current of the electrical component, in order to reduce the current allowable current of the battery, the correction factor needs to be set to a number greater than 0 and less than 1. And, when the duration remains unchanged, as the temperature continuously increases, the output current of the battery needs to be continuously reduced. Since the correction factors are all numbers greater than 0 and less than 1, the correction factor needs to be continuously reduced. Therefore, when the duration remains unchanged, the higher the temperature, the smaller the correction factor; and when the temperature remains unchanged, as the duration increases, the output current of the battery also needs to be continuously reduced. Since the correction factors are all numbers greater than 0 and less than 1, the correction factor also needs to be continuously reduced. Therefore, when the temperature remains unchanged, the longer the duration, the smaller the correction factor.

[0120] Step 305, obtain the maintenance duration of the correction magnification.

[0121] Step 306, determine whether the maintenance duration is greater than or equal to a preset maintenance duration threshold. If so, execute Step 307; otherwise, continue to execute Step 306.

[0122] Step 307, control the corrected allowable current to recover to the current allowable current.

[0123] It can be understood that when the corrected allowable current recovers to the current allowable current, Step 302 can be continued to readjust the output current of the battery.

[0124] Step 308, control the battery to output according to the current allowable current.

[0125] Hereinafter, taking C0 to represent the current allowable current, T0 to represent the moment when C0 is determined to be in the current range, t to represent the duration of C0 in the preset current range, the current thresholds including A1, A2, A3, and A1 > A2 > A3, the duration thresholds including T1, T2, T3, and T1 < T2 < T3, and the temperature associated with the electrical component being 0°C as an example, the embodiments of the present application will be introduced in more detail:

[0126] Figure 4 It is a schematic flowchart of the third method for adjusting the output current of the battery provided by the embodiments of the present application.

[0127] Exemplarily, as Figure 4 shown, the method 400 includes:

[0128] Step 401, obtain C0 and the temperature associated with the electrical component.

[0129] Step 402, determine whether C0 is greater than the maximum carrying current of the electrical component. If so, execute Step 404; otherwise, execute Step 403.

[0130] Step 403, control the battery to output according to C0.

[0131] Step 404, determine whether C0 is greater than or equal to A1. If so, execute Step 408; otherwise, execute Step 405.

[0132] Step 405, determine whether C0 is greater than or equal to A2 and less than A1. If so, execute Step 408; otherwise, execute Step 406.

[0133] Step 406, determine whether C0 is greater than or equal to A3 and less than A2. If so, execute Step 408; otherwise, execute Step 407.

[0134] Step 407: Determine that C0 is greater than 0 and less than A3.

[0135] Step 408: Start timing at time T0 to obtain a duration t.

[0136] It can be understood that for steps 404 to 406, the above-mentioned time T0 refers to the time when the judgment result is yes. For step 407, the time T0 refers to the time when it is determined that C0 is greater than 0 and less than A3.

[0137] Step 409: Determine whether t is greater than 0 and less than or equal to T1. If so, execute step 413; otherwise, execute step 410.

[0138] Step 410: Determine whether t is greater than T1 and less than or equal to T2. If so, execute step 414; otherwise, execute step 411.

[0139] Step 411: Determine whether t is greater than T2 and less than or equal to T3. If so, execute step 415; otherwise, execute step 412.

[0140] Step 412: Determine that t is greater than T3.

[0141] Step 413: Determine that the correction factor is X51.

[0142] Step 414: Determine that the correction factor is X52.

[0143] Step 415: Determine that the correction factor is X53.

[0144] Step 416: Determine that the correction factor is X54.

[0145] It can be understood that the correction factors involved in steps 413 to 416 are all the data in Table 1 above, and the temperature associated with the electrical components is 0°C.

[0146] Step 417: Determine whether the duration for maintaining the correction factor is greater than or equal to T4. If so, execute step 418; otherwise, continue to execute step 417.

[0147] Step 418: Restore the corrected allowable current to C0.

[0148] In summary, the method for adjusting the output current of a battery provided by the embodiments of the present application has the following beneficial effects:

[0149] By dynamically adjusting the current output capacity of the battery according to factors such as the current-carrying capacity of the electrical component (i.e., the maximum current that the electrical component can carry) and the temperature characteristics (i.e., the temperature associated with the electrical component), and accordingly adjusting the current output power of the battery, it is possible to improve the charge and discharge capacity of the battery without changing the hardware. This not only improves the usage efficiency of the battery but also reduces the battery performance loss, enabling the battery to fully utilize the capabilities of the battery cell.

[0150] Figure 5 It is a schematic structural diagram of an adjustment device for the output current of a battery provided by an embodiment of the present application.

[0151] Exemplarily, as Figure 5 shown, the device 500 includes:

[0152] A first acquisition module 501, configured to acquire the current allowable current of the battery and the temperature associated with the electrical component; wherein, the current allowable current is the maximum current that the battery is allowed to output.

[0153] A second acquisition module 502, configured to acquire the duration for which the current allowable current is within a preset current range.

[0154] A determination module 503, configured to determine a correction factor for the current allowable current according to the temperature and the duration.

[0155] A correction module 504, configured to correct the current allowable current according to the correction factor to obtain a corrected allowable current.

[0156] In a possible implementation manner, the device further includes a first determination module, specifically configured to: after acquiring the current allowable current of the battery and the temperature associated with the electrical component, further include: determining whether the current allowable current is greater than the maximum current-carrying capacity of the electrical component; determining the correction factor for the current allowable current according to the temperature and the duration, including: if it is determined that the current allowable current is greater than the maximum current-carrying capacity, then determining the correction factor for the current allowable current according to the temperature and the duration.

[0157] In a possible implementation manner, the determination module is specifically configured to: determine the correction factor for the current allowable current according to the temperature and the duration, including: querying a preset corresponding relationship according to the temperature and the duration to obtain the correction factor for the current allowable current; wherein, the corresponding relationship is used to describe the relationship between different combinations of temperature and duration and the correction factor.

[0158] In a possible implementation manner, in the preset corresponding relationship, when the duration remains unchanged, the temperature and the correction factor are negatively correlated, and when the temperature remains unchanged, the duration and the correction factor are negatively correlated.

[0159] In a possible implementation, the device further includes a second determination module, which is specifically configured to: after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, further include: determining whether the corrected allowable current meets a preset recovery condition; if the preset recovery condition is met, controlling the corrected allowable current to be restored to the allowable current before correction.

[0160] In a possible implementation, the second determination module is specifically configured to: determine whether the corrected allowable current meets a preset recovery condition, including: obtaining the maintenance duration of the correction factor; determining whether the maintenance duration is greater than or equal to a preset maintenance duration threshold; if it is determined that the maintenance duration is greater than or equal to the preset maintenance duration threshold, determining that the corrected allowable current meets the preset recovery condition.

[0161] In a possible implementation, the control module is specifically configured to: after correcting the current allowable current according to the correction factor to obtain the corrected allowable current, further include: adjusting the current output power of the battery according to the corrected allowable current to obtain the adjusted output power; controlling the battery to charge the electrical component according to the adjusted output power.

[0162] Figure 6 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application.

[0163] Exemplarily, as Figure 6 shown, the vehicle 600 includes: a memory 601 and a processor 602, wherein, an executable program code 6011 is stored in the memory 601, and the processor 602 is configured to call and execute the executable program code 6011 to execute a method for adjusting the output current of a battery.

[0164] In addition, an embodiment of the present application also protects a device, which may include a memory and a processor, wherein, an executable program code is stored in the memory, and the processor is configured to call and execute the executable program code to execute a method for adjusting the output current of a battery provided by an embodiment of the present application.

[0165] In this embodiment, the device can be divided into functional modules according to the above method examples. For example, it can correspond to each functional module, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0166] In the case where each functional module is divided corresponding to each function, the device may further include a first acquisition module, a second acquisition module, a determination module, a correction module, etc. It should be noted that all relevant contents of each step involved in the above method embodiment can be cited in the function description of the corresponding functional module, and will not be elaborated here.

[0167] It should be understood that the device provided in this embodiment is used to execute the above method for adjusting the output current of a battery, so the same effect as the above implementation method can be achieved.

[0168] In the case of adopting an integrated unit, the device may include a processing module and a storage module. Among them, when the device is applied to a vehicle, the processing module can be used to control and manage the actions of the vehicle. The storage module can be used to support the vehicle to execute relevant program codes, etc.

[0169] Among them, the processing module can be a processor or a controller, which can implement or execute various exemplary logic blocks, modules, and circuits shown in combination with the disclosure content of the present application. The processor can also be a combination that realizes computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module can be a memory.

[0170] In addition, the device provided in the embodiment of the present application can specifically be a chip, a component, or a module. The chip may include a processor and a memory connected thereto; among them, the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute the method for adjusting the output current of a battery provided in the above embodiment.

[0171] This embodiment also provides a computer-readable storage medium, in which computer program code is stored. When the computer program code runs on a computer, the computer is caused to execute the above relevant method steps to implement the method for adjusting the output current of a battery provided in the above embodiment.

[0172] This embodiment also provides a computer program product. When the computer program product runs on a computer, the computer is caused to execute the above relevant steps to implement the method for adjusting the output current of a battery provided in the above embodiment.

[0173] Among them, the device, computer-readable storage medium, computer program product, or chip provided in this embodiment is all used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be elaborated here.

[0174] Through the description of the above embodiments, those skilled in the art can understand that, for the convenience and brevity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0175] In the embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0176] The above content is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for adjusting battery output current, characterized in that: The method comprises: Acquire the current allowable current of the battery and the temperature associated with the electrical component; wherein the current allowable current is the maximum current allowed to be output by the battery; Obtaining a duration during which the current allowable current is in a preset current range; Determining a correction factor of the current allowable current according to the temperature and the duration; The current allowable current is corrected according to the correction factor to obtain a corrected allowable current.

2. The method according to claim 1, characterized in that After obtaining the current allowable current of the battery and the temperature associated with the electrical component, the method further includes: Determining whether the current allowable current is greater than the maximum carrying current of the electrical component; The step of determining the correction factor of the current allowable current according to the temperature and the duration includes: If it is determined that the current allowable current is greater than the maximum carrying current, a correction factor of the current allowable current is determined according to the temperature and the duration.

3. The method according to claim 1 or 2, characterized in that: The step of determining the correction factor of the current allowable current according to the temperature and the duration includes: According to the temperature and the duration, a preset corresponding relationship is queried to obtain the correction factor of the current allowable current; wherein the corresponding relationship is used to describe the relationship between different combinations of the temperature and the duration and the correction factor.

4. The method according to claim 3, characterized in that In the preset corresponding relationship, when the duration is unchanged, the temperature is negatively correlated with the correction factor; when the temperature is unchanged, the duration is negatively correlated with the correction factor.

5. The method according to claim 1, characterized in that After the current allowable current is corrected according to the correction factor to obtain the corrected allowable current, the method further includes: Determining whether the corrected allowable current meets a preset recovery condition; If the preset recovery condition is met, the corrected allowable current is controlled to be restored to the allowable current before correction.

6. The method according to claim 5, characterized in that The determining whether the corrected allowable current meets a preset recovery condition includes: Obtaining the maintenance time of the correction ratio; Determining whether the maintenance time is greater than or equal to a preset maintenance time threshold; If it is determined that the maintenance time is greater than or equal to the preset maintenance time threshold, it is determined that the corrected allowable current meets the preset recovery condition.

7. The method according to claim 1, characterized in that After the current allowable current is corrected according to the correction factor to obtain the corrected allowable current, the method further includes: According to the corrected allowable current, adjusting the current output power of the battery to obtain an adjusted output power; The battery is controlled to charge the electrical component according to the adjusted output power.

8. A battery output current adjustment device, characterized in that: The device comprises: A first acquisition module is used to acquire a current allowable current of the battery and a temperature associated with the electrical component; wherein the current allowable current is a maximum current allowed to be output by the battery; A second acquisition module is used to acquire the duration of the current allowable current being in a preset current range; A determination module, used to determine a correction factor of the current allowable current according to the temperature and the duration; The correction module is used to correct the current allowable current according to the correction factor to obtain a corrected allowable current.

9. A vehicle, characterized in that: The vehicle comprises: A memory for storing executable program codes; A processor, configured to call and run the executable program code from the memory, so that the vehicle executes the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 7 is implemented.

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