Method, device and system for adjusting SOP (State of Power) value of battery and storage medium

Abstract

The invention discloses a method, a device and a system for adjusting a battery power state SOP value and a storage medium. The method comprises the following steps: determining a minimum single voltage corresponding to each battery cell in a battery pack; when the voltage drop rate of the minimum single voltage of the battery pack is smaller than or equal to a preset rate, determining a target voltage interval where the minimum single voltage is located; calculating allowable power corresponding to the target voltage interval by using the working parameters of the battery pack to obtain target allowable power of the battery pack; and adjusting the real-time SOP value of the battery pack to the target allowable power of the battery. By adopting the scheme provided by the invention, under-voltage of the battery under the condition that the actual electric quantity is relatively high can be prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, and particularly relates to a battery power state SOP value adjustment method, device, system and storage medium. BACKGROUND

[0002] The power state SOP (State of Power) value of a power battery reflects the peak power that can be used by the power battery during charging and discharging. The driving motor and generator power are mainly controlled by referring to the SOP value during vehicle operation. The SOP value in the prior art is mainly obtained by querying a pre-stored power table according to the temperature and SOC (State Of Charge) of the battery. However, the SOP value in the power table is measured under the condition of full rest and no polarization, while the vehicle use is cumulative polarization. Therefore, the real capacity of the battery state is not completely matched with the power table. In general, the SOP value recorded in the power table is higher than the actual SOP value of the battery under the same temperature and SOC. If the SOP value recorded in the power table is used as the SOP value of the battery, the battery may be under-voltage in the case of sufficient actual power.

[0003] Therefore, how to provide a battery power state SOP value adjustment method to dynamically adjust the SOP value in real time and prevent the battery from being under-voltage in the case of sufficient actual power. SUMMARY

[0004] The present application provides a battery power state SOP value adjustment method, device, system and storage medium to dynamically adjust the SOP value in real time and prevent the battery from being under-voltage in the case of sufficient actual power.

[0005] The present application provides a battery power state SOP value adjustment method, comprising:

[0006] determining the minimum single cell voltage corresponding to each battery cell in a battery pack;

[0007] when the voltage drop rate of the minimum single cell voltage of the battery pack is less than or equal to a preset rate, determining a target voltage interval in which the minimum single cell voltage is located;

[0008] performing allowable power calculation corresponding to the target voltage interval by using the working parameters of the battery pack to obtain the target allowable power of the battery pack;

[0009] adjusting the real-time SOP value of the battery pack to the target allowable power of the battery.

[0010] The application has the beneficial effect that when the voltage drop rate of the minimum single cell voltage of the battery pack is less than or equal to the preset rate, the target voltage interval in which the minimum single cell voltage is located is determined, the allowable power corresponding to the target voltage interval is calculated by using the working parameter of the battery pack, and the target allowable power of the battery pack is obtained. The case that the voltage drop rate is less than or equal to the preset rate is usually the case that the battery pack has sufficient power, and therefore, the application can match the actual allowable power of the battery pack with the actual capacity of the battery pack when the battery pack has sufficient power, and prevent the battery from being under-voltage in the case that the actual power is relatively large.

[0011] In one embodiment, the target voltage interval is an interval greater than or equal to a first voltage threshold, and the working parameter includes a maximum discharge current and a rated voltage.

[0012] The target allowable power of the battery pack is obtained by using the working parameter of the battery pack to calculate the allowable power corresponding to the target voltage interval.

[0013] The target peak power of the battery pack is obtained by using the maximum discharge current and the rated voltage to calculate the power.

[0014] The target peak power is taken as the target allowable power.

[0015] In one embodiment, the target voltage interval is an interval less than a first voltage threshold and greater than or equal to a second voltage threshold, and the working parameter includes a voltage parameter and a power parameter of the battery.

[0016] The target allowable power of the battery pack is obtained by using the working parameter of the battery pack to calculate the allowable power corresponding to the target voltage interval.

[0017] A voltage following value of the allowable power is calculated based on the voltage parameter and the power parameter.

[0018] The voltage following value is taken as the target allowable power.

[0019] In one embodiment, the target voltage interval is an interval less than a second voltage threshold and greater than or equal to an under-voltage protection voltage, and the working parameter includes a voltage parameter, a current parameter and a power parameter of the battery.

[0020] The target allowable power of the battery pack is obtained by using the working parameter of the battery pack to calculate the allowable power corresponding to the target voltage interval.

[0021] A voltage following value of the allowable power is calculated based on the voltage parameter and the power parameter, and a current following value of the allowable power is calculated based on the current parameter and the power parameter.

[0022] taking the minimum value of the voltage follow value and the current follow value as the target allowable power.

[0023] In one embodiment, the method further comprises:

[0024] when the voltage drop rate of the minimum single cell voltage is greater than or equal to a preset rate, obtaining a preset power value, wherein the preset power value is a power value obtained through pre-experiment to make the battery pack voltage rebound;

[0025] adjusting the allowable power of the battery pack to the preset power value at the preset rate.

[0026] In one embodiment, the voltage parameters include an initial voltage, an under-voltage protection voltage, and a real-time voltage, and the power parameters include an initial power and an under-voltage power.

[0027] wherein the voltage follow value of the allowable power calculated based on the voltage parameters and the power parameters comprises:

[0028] performing current calculation using the initial power, the under-voltage power, the initial voltage, and the under-voltage protection voltage to obtain a current adjustment amount;

[0029] calculating a voltage change amount between the initial voltage and the real-time voltage;

[0030] performing power calculation using the current adjustment amount and the voltage change amount to obtain a first power change amount;

[0031] taking the difference between the initial power and the first power change amount as the voltage follow value of the allowable power.

[0032] In one embodiment, the current parameters include an initial current, an under-voltage current, and a real-time current, and the power parameters include an initial power and an under-voltage power.

[0033] wherein the current follow value of the allowable power calculated based on the current parameters and the power parameters comprises:

[0034] performing voltage calculation using the initial power, the under-voltage power, the initial current, and the under-voltage current to obtain a voltage adjustment amount;

[0035] calculating a current change amount between the initial current and the real-time current;

[0036] performing power calculation using the voltage adjustment value and the current change amount to obtain a second power change amount;

[0037] The difference between the initial power and the second power variation is taken as a current following value of the allowable power.

[0038] The application further provides a battery power state SOP value adjusting device, comprising:

[0039] A first determining module is configured to determine minimum single cell voltages corresponding to each battery cell in a battery pack;

[0040] A second determining module is configured to determine a target voltage interval in which the minimum single cell voltage is located when a voltage drop rate of the minimum single cell voltage is less than or equal to a preset rate;

[0041] A calculating module is configured to perform allowable power calculation corresponding to the target voltage interval by using working parameters of the battery pack, and obtain a target allowable power of the battery pack;

[0042] An adjusting module is configured to adjust a real-time SOP value of the battery pack to the target allowable power of the battery.

[0043] The application further provides a battery power state SOP value adjusting system, comprising:

[0044] at least one processor; and

[0045] a memory in communication connection with the at least one processor; wherein

[0046] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the battery power state SOP value adjusting method described in any of the above embodiments.

[0047] The application further provides a computer readable storage medium, when instructions in the storage medium are executed by a processor corresponding to a battery power state SOP value adjusting system, the battery power state SOP value adjusting system can implement the battery power state SOP value adjusting method described in any of the above embodiments.

[0048] Other features and advantages of the application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0049] The technical solutions of the application will be further described in detail below with the aid of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:

[0051] Figure 1 This is a flowchart of a method for adjusting the state of power (SOP) value of a battery according to an embodiment of this application;

[0052] Figure 2 This is a schematic diagram of a battery power state of operation (SOP) adjustment device according to an embodiment of this application;

[0053] Figure 3 This is a schematic diagram of the hardware structure of a battery power state of operation (SOP) adjustment system according to an embodiment of this application. Detailed Implementation

[0054] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0055] Figure 1 This is a flowchart of a method for adjusting the state of power (SOP) value of a battery according to an embodiment of this application, as follows: Figure 1 As shown, the method can be implemented as follows: S101-S104:

[0056] In step S101, the minimum single-cell voltage corresponding to each cell in the battery pack is determined;

[0057] In step S102, when the voltage drop rate of the minimum single cell voltage of the battery pack is less than or equal to a preset rate, the target voltage range of the minimum single cell voltage is determined.

[0058] In step S103, the allowable power corresponding to the target voltage range is calculated using the operating parameters of the battery pack to obtain the target allowable power of the battery pack.

[0059] In step S104, the real-time SOP value of the battery pack is adjusted to the target allowable power of the battery.

[0060] In the present application, the minimum single cell voltage corresponding to each cell in the battery pack is determined. The preset parameters of the battery pack are collected, wherein the battery pack comprises at least one cell, and the preset parameters at least include the single cell voltage corresponding to each cell. That is, at least the voltage corresponding to each cell in the battery pack is collected. In order to realize the high efficiency of the motor drive, the working voltage of the general electric device is set to be high, therefore, a plurality of cells are often connected in series to form a battery pack. In order to fully utilize the battery capacity and avoid under-voltage, the single cell voltage of each cell in the battery pack is obtained in the present application. In addition, the collected preset parameters can also include the temperature, SOC and current of each cell, etc. Then the voltages corresponding to each cell are compared to determine the minimum value in the voltages corresponding to each cell; the minimum value in the voltages corresponding to each cell is determined as the minimum single cell voltage corresponding to each cell in the battery pack. In addition, the minimum single cell voltage of the battery can also be read from a specific functional unit or microprocessor, which can be connected with the sensor for collecting the voltage of each cell of the battery, for obtaining the voltage of each cell of the battery, obtaining the minimum value from the voltage of each cell as the minimum single cell voltage corresponding to each cell in the battery pack, and storing the minimum single cell voltage.

[0061] When the voltage drop rate of the minimum single cell voltage of the battery pack is less than or equal to the preset rate, the target voltage interval in which the minimum single cell voltage is located is determined. Specifically, after determining the minimum single cell voltage in the single cell voltage corresponding to each cell in the battery pack, the voltage drop rate of the minimum single cell voltage is compared with the preset rate. Since the voltage gradually decreases as the power consumption, and the voltage drop rate is generally inversely proportional to the remaining power, that is, the less the remaining power, the faster the voltage drop rate. As shown in Table 1, it is the relationship between a certain single cell voltage and the battery consumption. As can be seen from the table, when the battery capacity is less than 20%, the battery voltage drops rapidly. Therefore, in order to prevent the battery from being under-voltage, the voltage drop rate of the minimum single cell voltage is compared with the preset rate.

[0062] Table 1: Corresponding relationship table of certain battery remaining capacity and battery voltage

[0063]

[0064] When the voltage drop rate of the minimum single cell voltage is less than or equal to the preset rate, it means that the battery capacity is sufficient, the initial voltage setting is relatively appropriate, and the polarization degree of the battery is small, at this time, the battery will not exist under-voltage risk. Therefore, in order to fully release the capacity of the battery, the target voltage interval in which the minimum single cell voltage is located is determined at this time.

[0065] The working parameters of the battery pack are used to calculate the allowable power corresponding to the target voltage interval, to obtain the target allowable power of the battery pack. Specifically, a corresponding relationship table can be set to record the corresponding relationship between the battery voltage and the target allowable power calculation method of the battery pack. The corresponding relationship table is shown in Table 2:

[0066] Table 2: Corresponding relationship table of battery voltage and target allowable power calculation method of battery pack

[0067]

[0068] (1) When the target voltage interval is greater than or equal to the first voltage threshold, the working parameters include the maximum discharge current and the rated voltage. The target allowable power of the battery pack can be calculated by using the working parameters of the battery pack corresponding to the target voltage interval, which can be implemented as follows: ① Calculate the target peak power of the battery pack by using the maximum discharge current and the rated voltage; ② Take the target peak power as the target allowable power.

[0069] As shown in Table 2, when the target voltage interval of the minimum single cell voltage is greater than or equal to the first voltage threshold recorded in the corresponding relationship table, the target allowable power calculation strategy corresponding to the target voltage interval is determined as follows: the peak power of the battery pack is determined, and the peak power of the battery pack is taken as the target allowable power of the battery pack. The peak power refers to the maximum power that the battery can reach in a short time. When the minimum single cell voltage is greater than or equal to the first voltage threshold, it means that the battery has sufficient power at this time, so the target allowable power of the battery pack is set to the peak power, thereby ensuring sufficient release of power and providing utilization efficiency of the battery. Specifically, when calculating the peak power, the rated voltage of the battery pack and the maximum discharge current of the battery pack can be used for calculation. In addition, the peak power of the battery pack is recorded in the BMS (Battery Management System), and the peak power is a certain value, so the peak power can also be read from the BMS.

[0070] (2) When the target voltage interval is less than the first voltage threshold and greater than or equal to the second voltage threshold, the working parameters include the voltage parameter and the power parameter of the battery. The target allowable power of the battery pack can be calculated by using the working parameters of the battery pack corresponding to the target voltage interval, which can be implemented as follows: ① Calculate the voltage following value of the allowable power based on the voltage parameter and the power parameter; ② Take the voltage following value as the target allowable power.

[0071] As shown in Table 2, when the minimum single cell voltage is less than the first voltage threshold value recorded in the correspondence table and greater than or equal to the second voltage threshold value recorded in the correspondence table, at this time, in order to prevent the voltage from suddenly dropping due to continuous discharge at a high power, at this time, the target allowable power of the battery is adjusted following the voltage.

[0072] (3) When the target voltage interval is an interval less than the second voltage threshold value and greater than or equal to the undervoltage protection voltage, the operating parameters include the voltage parameter, the current parameter, and the power parameter of the battery; the step of calculating the allowable power corresponding to the target voltage interval using the operating parameters of the battery pack to obtain the target allowable power of the battery pack can be implemented as follows: calculating a voltage following value of the allowable power based on the voltage parameter and the power parameter, and calculating a current following value of the allowable power based on the current parameter and the power parameter; taking the minimum value of the voltage following value and the current following value as the target allowable power.

[0073] As shown in Table 2, due to the influence of voltage polarization when the battery is insufficient, it is not easy to control the stability of the voltage, when the target voltage interval of the minimum single cell voltage is an interval less than the second voltage threshold value recorded in the correspondence table and greater than or equal to the undervoltage protection voltage recorded in the correspondence table, the current control is increased, and the minimum value of the voltage following value and the current following value of the allowable power is taken as the target allowable power of the battery pack.

[0074] In addition, as can be seen from Table 1, when the battery is insufficient, the voltage drops rapidly. Therefore, in the present application, when the voltage drop rate of the minimum single cell voltage is greater than or equal to a preset rate, a preset power value is obtained, wherein the preset power value is a power value obtained by pre-experiment to make the battery pack voltage rebound; then, the allowable power of the battery pack is adjusted to the preset power value at the preset rate. Even if the voltage rebounds, the allowable power still needs to be reduced to the preset power value. Specifically, when the voltage drop rate is greater than or equal to the preset rate, the allowable power of the battery pack is adjusted to the preset power value, and since the preset power value is a power value obtained by pre-experiment to make the battery pack voltage rebound, adjusting the allowable power of the battery pack to the preset power value can make the battery pack voltage rebound, avoiding the voltage value of the battery pack reaching the undervoltage protection voltage.

[0075] Finally, the real-time SOP value of the battery pack is adjusted to the target allowable power of the battery to release the power to the greatest extent while preventing the battery from being undervoltage.

[0076] Further, the preset parameter of the battery pack is monitored, the target allowable power corresponding to the battery state is determined through the voltage parameter, the current parameter and the power parameter, the power is released to the maximum extent through the closed-loop correction method, the reported power is corrected in real time, and the voltage is stabilized.

[0077] The application has the beneficial effect that when the voltage drop rate of the minimum single cell voltage of the battery pack is less than or equal to the preset rate, the target voltage interval in which the minimum single cell voltage is located is determined, the allowable power corresponding to the target voltage interval is calculated by using the working parameter of the battery pack, and the target allowable power of the battery pack is obtained. Since the case that the voltage drop rate is less than or equal to the preset rate is usually the case that the battery pack has sufficient power, the application can match the actual allowable power of the battery pack with the actual capacity of the battery pack when the battery pack has sufficient power, and prevent the battery from being under-voltage in the case that the actual power is relatively large.

[0078] In one embodiment, the target voltage interval is an interval greater than or equal to a first voltage threshold, and the working parameter includes a maximum discharge current and a rated voltage; the above step S103 can be implemented as steps A1-A2 as follows:

[0079] In step A1, the maximum discharge current and the rated voltage are used for power calculation to obtain the target peak power of the battery pack;

[0080] In step A2, the target peak power is taken as the target allowable power.

[0081] In this embodiment, when the minimum single cell voltage is greater than or equal to the first voltage threshold, it indicates that the battery has sufficient power at this time, and therefore the allowable power of the battery pack is set to the peak power, so as to ensure sufficient release of power and improve the utilization efficiency of the battery. The peak power refers to the maximum power that the battery can reach in a short time.

[0082] The beneficial effect of this embodiment is that in the case of sufficient power, the allowable power of the battery pack is set to the peak power, so as to ensure sufficient release of power and improve the utilization efficiency of the battery.

[0083] In one embodiment, the target voltage interval is an interval less than a first voltage threshold and greater than or equal to a second voltage threshold, and the working parameter includes a voltage parameter and a power parameter of the battery; the above step S103 can be implemented as steps B1-B2 as follows:

[0084] In step B1, a voltage following value of the allowable power is calculated based on the voltage parameter and the power parameter;

[0085] In step B2, the voltage following value is taken as the target allowable power.

[0086] In the embodiment, when the minimum single-cell voltage is less than the first voltage threshold and greater than or equal to the second voltage threshold, the target allowable power of the battery is adjusted to follow the voltage to prevent voltage drop caused by continuous discharge at a high power. First, the voltage parameters of the battery are obtained, wherein the voltage parameters of the battery include a starting voltage, an under-voltage protection voltage, and a voltage at a current time; then, a voltage following value of the allowable power is calculated based on the voltage parameters and power parameters of the battery; and the voltage following value of the allowable power is determined as the target allowable power of the battery pack.

[0087] For example, the voltage following value of the battery allowable power is determined by the following formula:

[0088]

[0089] wherein P1 is the voltage following value, P 起始 is the initial power of the battery pack, P 目标 is the under-voltage power of the battery pack, V 起始 is the initial voltage of the battery pack, V 目标 is the under-voltage protection voltage of the battery pack, V 实时 is the real-time voltage of the battery pack.

[0090] The embodiment has the effect that, in the case of insufficient power, the voltage is not easy to control due to voltage polarization, and at this time, the control of the current can be realized by setting the allowable power as the voltage following value.

[0091] The embodiment has the beneficial effect that the voltage following value of the power changes with the change of the voltage following value of the power in the battery pack, that is, the change amount of the power is positively correlated with the change amount of the voltage, thereby avoiding the sudden increase of the current caused by excessive power and too small voltage. By taking the voltage following value as the target allowable power, the current can be controlled to avoid under-voltage when the voltage is not easy to control due to excessive polarization of the battery.

[0092] In one embodiment, the target voltage range is a range less than the second voltage threshold and greater than or equal to the under-voltage protection voltage, and the working parameters include voltage parameters, current parameters and power parameters of the battery; and the step S103 can be further implemented as steps C1-C2 as follows:

[0093] In step C1, a voltage following value of the allowable power is calculated based on the voltage parameters and the power parameters, and a current following value of the allowable power is calculated based on the current parameters and the power parameters;

[0094] In step C2, the minimum value between the voltage following value and the current following value is taken as the target allowable power.

[0095] In the embodiment, the minimum of the voltage following value and the current following value of the allowable power is taken as the target allowable power of the battery pack by calculating the voltage following value and the current following value of the allowable power. Specifically, the voltage parameter, the current parameter and the power parameter of the battery are acquired, i.e. the voltage, the current and the power at the starting moment and the under-voltage protection are acquired respectively.

[0096] The voltage following value of the allowable power is calculated based on the voltage parameter and the power parameter of the battery, and the current following value of the allowable power is calculated based on the current parameter and the power parameter of the battery.

[0097] For example, the voltage following value of the battery allowable power is determined by the following formula:

[0098]

[0099] Wherein, P1 is the voltage following value, P 起始 is the initial power of the battery pack, P 目标 is the under-voltage power of the battery pack, V 起始 is the initial voltage of the battery pack, V 目标 is the under-voltage protection voltage of the battery pack, V 实时 is the real-time voltage of the battery pack.

[0100] The beneficial effect of the embodiment is that the minimum of the voltage following value and the current following value is taken as the target allowable power, so that the battery pack is operated with a more conservative target allowable power in this way of taking the smaller one from the two following values, and the risk of under-voltage of the battery is further reduced.

[0101] In addition, the battery pack is usually provided with a current sensor (such as a Hall sensor, a flux gate current sensor, an optical current sensor, etc.), so the voltage following value of the battery allowable power can also be determined in the following way:

[0102] When the event triggering the voltage following value calculation occurs, the current value of the battery pack at the current moment is acquired by the current sensor, and the current value at the current moment is substituted into the following formula to calculate the voltage following value of the battery allowable power:

[0103] P3=P 起始 -I 起始 (V 起始 -V 实时 )

[0104] Wherein, P3 is the voltage following value, I 起始 is the current of the battery pack when the event triggering the voltage following value calculation occurs.

[0105] The current following value of the battery allowable power is calculated by the following formula:

[0106]

[0107] P2 is the allowable power of the battery pack, P 起始 P1 is the initial power of the battery pack, P 目标 P3 is the under-voltage power of the battery pack, P 起始 I1 is the initial current of the battery pack, I 目标 I3 is the under-voltage current of the battery pack, I 实时 I2 is the real-time current of the battery pack.

[0108] In addition, the battery pack is usually provided with a voltage sensor, so the voltage following value of the battery allowable power can also be determined in the following manner:

[0109] At the event of triggering the current following value calculation, the voltage value of the battery pack at the current time is obtained through the voltage sensor, and the voltage value at the current time is substituted into the following formula to calculate the current following value of the battery allowable power:

[0110] P4 = P 起始 -V 起始 (I 起始 -I 实时 )

[0111] P4 is the current following value, V 起始 is the voltage of the battery pack at the event of triggering the current following value calculation.

[0112] After the voltage following value and the current following value are calculated, the minimum value between the voltage following value and the current following value is taken as the target allowable power.

[0113] In the above two voltage following value calculation schemes, the coefficients corresponding to the voltage variation amount are values related to the current value. It can be seen from the present scheme that the greater the current value, the greater the coefficient, thereby causing the greater the power reduction rate. When the coefficient is greater than 1, the power reduction rate is greater than the voltage reduction rate, thereby reducing the current. The principle of adjusting the output power through the current following value is similar to that of adjusting the output power through the voltage following value, which is not described here.

[0114] In an embodiment, the method can also be implemented as steps D1-D2 as follows:

[0115] In step D1, when the voltage reduction rate of the minimum single cell voltage is greater than or equal to a preset rate, a preset power value is obtained, wherein the preset power value is a power value obtained through a pre-test to make the battery pack voltage rebound.

[0116] In step D2, the allowable power of the battery pack is adjusted to the preset power value at the preset rate.

[0117] In the embodiment, when the voltage drop rate of the minimum single cell voltage is greater than or equal to the preset rate, to prevent the battery from being discharged with a large power to cause the battery under-voltage, a preset power value is obtained, which can be a power value making the battery pack voltage rebound through a pre-trial, and can be obtained through a pre-trial or a pre-stored data query.

[0118] Then the allowable power of the battery pack is controlled to drop to the preset power value according to the preset rate. At this time, the allowable power of the battery is locked to the preset power value, and even if the voltage rebounds, the allowable power is still kept to drop to the preset power value.

[0119] The embodiment has the beneficial effect that when the voltage drop rate is greater than or equal to the preset rate, the allowable power of the battery pack is adjusted to the preset power value, and since the preset power value is a power value making the battery pack voltage rebound through a pre-trial, adjusting the allowable power of the battery pack to the preset power value can make the battery pack voltage rebound and avoid the voltage value of the battery pack reaching the under-voltage protection voltage.

[0120] In an embodiment of the application, the voltage parameters include an initial voltage, an under-voltage protection voltage and a real-time voltage, and the power parameters include an initial power and an under-voltage power. The voltage following value of the allowable power calculated based on the voltage parameters and the power parameters in the steps B1 and C1 can be implemented as steps E1-E4 as follows:

[0121] In step E1, current calculation is performed using the initial power, the under-voltage power, the initial voltage and the under-voltage protection voltage to obtain a current adjustment amount;

[0122] In step E2, a voltage change amount between the initial voltage and the real-time voltage is calculated;

[0123] In step E3, power calculation is performed using the current adjustment amount and the voltage change amount to obtain a first power change amount;

[0124] In step E4, the difference between the initial power and the first power change amount is taken as the voltage following value of the allowable power.

[0125] In the embodiment, the voltage following value of the allowable power is determined in the following manner:

[0126] The voltage following value is calculated according to the following formula:

[0127]

[0128] wherein P1 is the voltage following value, P 起始 is the initial power of the battery pack, and P目标 V is an initial voltage of the battery pack, V 起始 V is an initial voltage of the battery pack, V 目标 V is an initial voltage of the battery pack, V 实时 V is an initial voltage of the battery pack, V

[0129] It can be seen that when the current value is large, the value of is large, and when the current is large enough, the value of is not less than 1, which will cause to be greater than V 起始 -V 实时 , so the beneficial effects of the embodiment are that the power decrease rate can be not less than the voltage decrease rate, and since the current is equal to the quotient of power and voltage, and the power decrease rate is not less than the voltage decrease rate, the current can be stabilized at the current value or controlled to decrease, thereby achieving current control.

[0130] In an embodiment of the present application, the current parameters include an initial current, an under-voltage current and a real-time current, and the power parameters include an initial power and an under-voltage power. The step C1 of calculating the current following value of the allowable power based on the current parameters and the power parameters can be real-time as follows:

[0131] In step F1, the initial power, the under-voltage power, the initial current and the under-voltage current are used to calculate the voltage to obtain a voltage adjustment value;

[0132] In step F2, the current change value between the initial current and the real-time current is calculated;

[0133] In step F3, the voltage adjustment value and the current change value are used to calculate the power to obtain a second power change value;

[0134] In step F4, the difference between the initial power and the second power change value is taken as the current following value of the allowable power.

[0135] In the embodiment, the current following value of the allowable power is determined as follows:

[0136] The current following value is calculated according to the following formula:

[0137]

[0138] Wherein, P2 is the current following value of the allowable power of the battery pack, P 起始 is the initial power of the battery pack, P 目标 is the initial power of the battery pack, P 起始 is the initial current of the battery pack, I 目标I is an under-voltage current of the battery pack 实时 I is a real-time current of the battery pack.

[0139] The embodiment has the beneficial effect that the current following value of the power refers to a power value that changes with the current, and thus the power of the battery pack can change with the current, so that the power of the battery pack is positively correlated with the current, and the situation of excessive power and insufficient current is avoided, thereby avoiding excessive voltage of the battery pack.

[0140] Figure 2 FIG. 1 is a structural schematic diagram of a battery power state SOP value adjustment device according to an embodiment of the present application, as shown in the figure, the device comprises: Figure 2

[0141] A first determination module 201 is configured to determine minimum single-cell voltages corresponding to each battery cell in the battery pack.

[0142] A second determination module 202 is configured to determine a target voltage interval in which the minimum single-cell voltage is located when a voltage drop rate of the minimum single-cell voltage is less than or equal to a preset rate.

[0143] A calculation module 203 is configured to perform allowable power calculation corresponding to the target voltage interval by using working parameters of the battery pack, to obtain a target allowable power of the battery pack.

[0144] An adjustment module 204 is configured to adjust a real-time SOP value of the battery pack to the target allowable power of the battery.

[0145] In an embodiment, the calculation module comprises:

[0146] A first calculation sub-module is configured to perform power calculation by using the maximum discharge current and the rated voltage, to obtain a target peak power of the battery pack.

[0147] A first determination sub-module is configured to take the target peak power as the target allowable power.

[0148] In an embodiment, the calculation module further comprises:

[0149] A second calculation sub-module is configured to calculate a voltage following value of the allowable power based on the voltage parameter and the power parameter.

[0150] A second determination sub-module is configured to take the voltage following value as the target allowable power.

[0151] In an embodiment, the calculation module further comprises:

[0152] ​a third calculation sub-module, configured to calculate a voltage following value of the allowable power based on the voltage parameter and the power parameter, and calculate a current following value of the allowable power based on the current parameter and the power parameter;

[0153] a third determination sub-module, configured to take a minimum value of the voltage following value and the current following value as the target allowable power.

[0154] In an embodiment, the apparatus further comprises:

[0155] an acquisition module, configured to acquire a preset power value when a voltage drop rate of the minimum single-cell voltage is greater than or equal to a preset rate, wherein the preset power value is a power value obtained through a pre-test to enable the battery pack voltage to rebound;

[0156] an adjustment module, further configured to adjust the allowable power of the battery pack to the preset power value at the preset rate.

[0157] In an embodiment, in the second calculation sub-module and the third calculation sub-module, the voltage following value of the allowable power calculated based on the voltage parameter and the power parameter comprises:

[0158] a current calculation is performed by using the initial power, the under-voltage power, the initial voltage and the under-voltage protection voltage, to obtain a current adjustment amount;

[0159] a voltage variation amount between the initial voltage and the real-time voltage is calculated;

[0160] a first power variation amount is calculated by using the current adjustment amount and the voltage variation amount;

[0161] a difference between the initial power and the first power variation amount is taken as the voltage following value of the allowable power.

[0162] In an embodiment, in the third calculation sub-module, the current following value of the allowable power calculated based on the current parameter and the power parameter comprises:

[0163] a voltage calculation is performed by using the initial power, the under-voltage power, the initial current and the under-voltage current, to obtain a voltage adjustment amount;

[0164] a current variation amount between the initial current and the real-time current is calculated;

[0165] a second power variation amount is calculated by using the voltage adjustment value and the current variation amount;

[0166] a difference between the initial power and the second power variation amount is taken as the current following value of the allowable power.

[0167] Figure 3 FIG. 1 shows a schematic diagram of a hardware structure of a battery state of power (SOP) value adjustment system according to an embodiment of the present application. As shown, the system includes: Figure 3

[0168] at least one processor 320; and

[0169] a memory 304 connected with the at least one processor 320; wherein

[0170] the memory 304 stores instructions executable by the at least one processor 320, and the instructions are executed by the at least one processor 320 to implement the battery state of power (SOP) value adjustment method described in any of the above embodiments.

[0171] Referring to Figure 3 , the battery state of power (SOP) value adjustment system 300 can include one or more of the following components: a processing component 302, a memory 304, a power supply component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.

[0172] The processing component 302 generally controls the overall operations of the battery state of power (SOP) value adjustment system 300. The processing component 302 can include one or more processors 320 to execute instructions to complete all or part of steps of the above methods. In addition, the processing component 302 can include one or more modules to facilitate the interaction between the processing component 302 and other components. For example, the processing component 302 can include a multimedia module to facilitate the interaction between the multimedia component 308 and the processing component 302.

[0173] The memory 304 is configured to store various types of data to support the operation of the battery state of power (SOP) value adjustment system 300. Examples of these data include instructions for any application or method operating on the battery state of power (SOP) value adjustment system 300, such as text, pictures, videos, etc. The memory 304 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0174] ​The power component 306 provides power to various components of the battery power state SOP value adjustment system 300. The power component 306 can include a power management system, one or more power sources, and other components associated with generating, managing and distributing power for the battery power state SOP value adjustment system 300.

[0175] The multimedia component 308 includes a screen providing an output interface between the battery power state SOP value adjustment system 300 and a user. In some embodiments, the screen includes a liquid crystal display (LCD) and a touch panel (TP). If the screen includes the touch panel, the screen can be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, slide and gesture on the touch panel. The touch sensor can not only sense a boundary of a touch or slide action, but also detect duration and pressure related to the touch or slide action. In some embodiments, the multimedia component 308 can further include a front camera and / or a rear camera. The front camera and / or the rear camera can receive external multimedia data when the battery power state SOP value adjustment system 300 is in an operation mode, such as a shooting mode or a video mode. Each of the front and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0176] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) configured to receive external audio signals when the battery power state SOP value adjustment system 300 is in an operation mode, such as an alarm mode, a recording mode, a voice recognition mode, and a voice output mode. The received audio signals can be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0177] The I / O interface 312 provides an interface between the processing component 302 and peripheral interface modules, which can be a keyboard, a click wheel, buttons, and the like. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0178] The sensor component 314 includes one or more sensors for providing various aspects of state assessment for the battery power status SOP value adjustment system 300. For example, the sensor component 314 can include a sound sensor. In addition, the sensor component 314 can detect an on / off state of the battery power status SOP value adjustment system 300, relative positioning of components, such as a display and keypad of the battery power status SOP value adjustment system 300, the sensor component 314 can also detect an operational state of the battery power status SOP value adjustment system 300 or a component of the battery power status SOP value adjustment system 300, an orientation or acceleration / deceleration of the battery power status SOP value adjustment system 300, and a temperature change of the battery power status SOP value adjustment system 300. The sensor component 314 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 314 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 314 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, a material build-up thickness sensor, or a temperature sensor.

[0179] The communication component 316 is configured to enable the battery power status SOP value adjustment system 300 to provide wired or wireless communication capabilities with other devices and cloud platforms. The battery power status SOP value adjustment system 300 can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an example embodiment, the communication component 316 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 316 also includes a near-field communication (NFC) module to facilitate short-range communications. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0180] In an example embodiment, the battery power status SOP value adjustment system 300 can be implemented using one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements, for performing the battery power status SOP value adjustment methods described in any of the embodiments above.

[0181] The application further provides a computer readable storage medium, when instructions in the storage medium are executed by a processor of a battery state of power (SOP) value adjustment system, the battery state of power (SOP) value adjustment system is enabled to implement the battery state of power (SOP) value adjustment method described in any one of the embodiments.

[0182] Those skilled in the art should understand that embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk memory and optical memory, etc.) containing computer-usable program code.

[0183] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus generate a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0184] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0185] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide a process for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0186] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method of regulating a state of power, SOP, value of a battery, characterized by, The method comprises: determining the minimum single cell voltage corresponding to each cell in the battery pack; when the voltage drop rate of the minimum single cell voltage of the battery pack is less than or equal to a preset rate, determining a target voltage interval in which the minimum single cell voltage is located; performing allowable power calculation corresponding to the target voltage interval by using the working parameters of the battery pack to obtain the target allowable power of the battery pack; adjusting the real-time SOP value of the battery pack to the target allowable power of the battery.

2. The method of claim 1, wherein, The target voltage interval is an interval greater than or equal to a first voltage threshold, and the working parameters include a maximum discharge current and a rated voltage; wherein, the allowable power calculation corresponding to the target voltage interval by using the working parameters of the battery pack to obtain the target allowable power of the battery pack comprises: performing power calculation by using the maximum discharge current and the rated voltage to obtain the target peak power of the battery pack; the target peak power is taken as the target allowable power.

3. The method of claim 1, wherein, The target voltage interval is an interval less than a first voltage threshold and greater than or equal to a second voltage threshold, and the working parameters include voltage parameters and power parameters of the battery; wherein, the allowable power calculation corresponding to the target voltage interval by using the working parameters of the battery pack to obtain the target allowable power of the battery pack comprises: calculating a voltage following value of the allowable power based on the voltage parameters and the power parameters; the voltage following value is taken as the target allowable power.

4. The method of claim 1, wherein, The target voltage interval is an interval less than a second voltage threshold and greater than or equal to an under-voltage protection voltage, and the working parameters include voltage parameters, current parameters and power parameters of the battery; wherein, the allowable power calculation corresponding to the target voltage interval by using the working parameters of the battery pack to obtain the target allowable power of the battery pack comprises: calculating a voltage following value of the allowable power based on the voltage parameters and the power parameters, and calculating a current following value of the allowable power based on the current parameters and the power parameters; the minimum value of the voltage following value and the current following value is taken as the target allowable power.

5. The method of claim 1, wherein, The method further comprises: when the voltage drop rate of the minimum single cell voltage is greater than or equal to a preset rate, obtaining a preset power value, wherein the preset power value is a power value obtained through pre-experiment to make the battery pack voltage rebound; adjusting the allowable power of the battery pack to the preset power value at a preset rate.

6. The method of claim 3 or 4, wherein, The voltage parameters include an initial voltage, an under-voltage protection voltage and a real-time voltage, and the power parameters include an initial power and an under-voltage power; wherein, the calculation of the voltage following value of the allowable power based on the voltage parameters and the power parameters comprises: performing current calculation by using the initial power, the under-voltage power, the initial voltage and the under-voltage protection voltage to obtain a current adjustment amount; calculating a voltage change amount between the initial voltage and the real-time voltage; performing power calculation by using the current adjustment amount and the voltage change amount to obtain a first power change amount; the difference between the initial power and the first power change amount is taken as the voltage following value of the allowable power.

7. The method of claim 4, wherein, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, 8. An apparatus for regulating a state of power, SOP, value of a battery, characterized by The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, 9. A system for adjusting the state of power (SOP) value of a battery, characterized in that, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, 10. A computer-readable storage medium, characterized in that, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage current and real-time current, and the power parameters include initial power and under-voltage power, The current parameters include initial current, under-voltage

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