Method, device, equipment, and medium for charging storage power source

Abstract

The present application provides a method, device, equipment, and medium for charging a storage power source, the method including the steps of: acquiring the voltages of each of a plurality of cells in a battery pack of a battery module; and selecting a corresponding charging method based on the magnitude of the minimum value among the voltages of the plurality of cells to charge the battery module, the charging method including a first charging method and a second charging method.

Description

[Technical field]

[0001] The present application relates to the field of new energy technology, for example, to a charging method, device, equipment, and medium for a storage power source. [Background technology]

[0002] The charging means of a portable power storage power source is usually a single charging means, which always requires a long charging time, consumes a lot of power due to heat generation, and has low charging efficiency. As a result, not only does it cause a poor user experience, but the long-term heat generation of the battery also increases the internal temperature of the battery, which has serious effects on the safety and cycle life of the battery. In addition, the high low-temperature charging current of the portable power storage power source also poses the risk of lithium precipitation in the battery. Summary of the Invention [Problem to be solved by the invention]

[0003] The present application provides a method, device, equipment and medium for charging a storage power source, so as to solve the problems of low charging efficiency, long charging time and high power consumption due to heat in related art, and further improve the safety and service life of the battery. [Means for solving the problem]

[0004] The present application provides a method for charging a storage power source, obtaining a voltage of each of a plurality of cells in a battery pack of the battery module; The method includes a step of selecting a corresponding charging method based on a minimum value among the voltages of the plurality of cells to charge the battery module, the charging method including a first charging method and a second charging method.

[0005] The present application provides a charging device for a storage power source, a cell voltage acquisition module configured to acquire voltages of each of a plurality of cells in a battery pack of the battery module; and a method selection module configured to select a corresponding charging method to charge the battery module based on a magnitude of a minimum value among the voltages of the plurality of cells, the charging method including a first charging method and a second charging method.

[0006] The present application provides an electronic device, the electronic device comprising: At least one processor; a memory communicatively coupled to the at least one processor; A computer program executable by the at least one processor is stored in the memory, and the computer program is executed by the at least one processor such that the at least one processor can perform the above-mentioned method for charging a storage power source.

[0007] The present application provides a computer-readable storage medium, in which computer instructions are stored, and which, when executed by a processor, are used to realize the above-mentioned method for charging a storage power source. [Brief description of the drawings]

[0008] [Figure 1] 2 is a flow chart illustrating a method for charging a storage power source according to an embodiment of the present application. [Diagram 2] 2 is a schematic diagram of a charging curve when a first charging method is executed among the methods for charging a storage power source according to an embodiment of the present application; FIG. [Diagram 3] 4 is a schematic diagram of a charging curve when a second charging method is executed among the charging methods for the storage power source according to the embodiment of the present application; FIG. [Figure 4] 4 is a schematic diagram showing the effect of a charging method for a storage power source according to an embodiment of the present application; FIG. [Diagram 5] 1 is a block diagram of a charging device for a storage power source according to an embodiment of the present application; [Figure 6] 1 is a structural schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The following describes the technical solutions in the embodiments of the present application in combination with the drawings, and the described embodiments are only a part of the embodiments of the present application.

[0010] The terms "first," "second," and the like in the present specification, claims, and drawings are used to distinguish between similar objects and are not necessarily used to describe a particular order or priority. The data used in this manner may be interchanged under appropriate circumstances to allow the embodiments of the present application described herein to be performed in an order other than that shown or described herein. It is noted that the terms "comprise" and "have" and any variations thereof are intended to cover a non-exclusive inclusion, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those expressly listed and may include other steps or units not expressly listed or inherent to those processes, methods, products, or apparatus.

[0011] 1 is a flow chart of a method for charging a storage power source according to an embodiment of the present application. As shown in FIG. 1, the method for charging a storage power source includes the following steps:

[0012] S101, obtaining the voltages of each of a plurality of cells in a battery pack of a battery module.

[0013] S102, selecting a corresponding charging method according to the magnitude of the minimum value among the voltages of the plurality of cells to charge the battery module, the charging method including a first charging method and a second charging method.

[0014] Before obtaining the voltage of each cell in the battery pack of the battery module, the battery module is first left to stand in an environment of 25°C for 3 hours to ensure that the battery module itself is in a stable state before charging.

[0015] After the battery module is left standing, the battery management system (BMS) device is connected to the battery module, the voltage of each cell in the battery pack of the battery module is obtained by the BMS, the magnitude of the detected voltages of the multiple cells in the battery pack is compared, and the minimum voltage value of the multiple cells in the battery pack is obtained, and a corresponding charging method is selected based on the minimum voltage value, thereby selecting different charging methods according to the minimum voltage value of the cells in the battery pack, which is advantageous to improving the charging efficiency, charging safety, and service life of the battery.

[0016] According to an embodiment of the present application, the step of selecting a corresponding charging method based on the magnitude of the minimum value among the voltages of the plurality of cells includes: The method includes performing a first charging method when the minimum value of the voltages of the plurality of cells is equal to or greater than a first preset value.

[0017] The first preset value is 3.6 V. That is, the first charging method is executed when the minimum value of the voltages of the multiple cells is equal to or greater than 3.6 V. The first charging method may be a charging means for a ternary material in the related art.

[0018] According to an embodiment of the present application, the step of selecting a corresponding charging method based on the magnitude of the minimum value among the voltages of the plurality of cells includes: The method includes discharging the battery module at a first constant power when a minimum value of the voltages of the multiple cells is greater than or equal to a second preset value and less than the first preset value, and obtaining a first discharge time when the minimum value of the voltages of the multiple cells is a third preset value; performing a second charging method when the first discharge time is greater than or equal to the first preset time; and performing the first charging method when the first discharge time is less than the first preset time.

[0019] The first preset value is 3.6V, the second preset value is 3.4V, the third preset value is 3V, the first preset time is 30min, the first constant power is P, and P is the nominal energy value of the battery module.

[0020] That is, when the minimum value of the voltages of the multiple cells is greater than or equal to 3.4V and less than 3.6V, a first constant power P is adopted to discharge the battery module, and the voltage of each cell is detected in real time; when the minimum value of the voltages of the multiple cells reaches 3V, a first discharge time is recorded; when the first discharge time is greater than or equal to 30min, a second charging method is executed; when the first discharge time is less than 30min, the first charging method is executed, and the first charging method may be a charging means for ternary materials in the related art, and the second charging method may be a charging means for lithium iron phosphate materials in the related art.

[0021] Discharge to the battery module is selected, and a long discharge time indicates that the material system of the battery module is low and the amount of power is high, and the second charging method is selected; conversely, a short discharge time indicates that the material system of the battery is high and the amount of power is low, and the first charging method is selected.

[0022] According to an embodiment of the present application, the step of selecting a corresponding charging method based on the magnitude of the minimum value among the voltages of the plurality of cells includes: The method includes: charging the battery module with a second constant power if a minimum value of the voltages of the multiple cells is equal to or greater than a fourth preset value and less than a second preset value, and obtaining a charging time if the minimum value of the voltages of the multiple cells is a fifth preset value; performing a second charging method if the charging time is equal to or greater than the second preset time; discharging the battery module with a first constant power if the charging time is less than the second preset time, and obtaining a second discharging time if the minimum value of the voltages of the multiple cells is a third preset value; performing the second charging method if the second discharging time is equal to or greater than the second preset time; and performing the first charging method if the second discharging time is less than the second preset time.

[0023] The second preset value is 3.4V, the third preset value is 3V, the fourth preset value is 2.0V, the fifth preset value is 3.45V, the second preset time is 10min, and the second constant power is 0.5P, where P is the nominal energy value of the battery module.

[0024] That is, when the minimum value of the voltages of the multiple cells is greater than or equal to 2.0V and less than 3.4V, charge the battery module with a second constant power of 0.5P, detect the minimum value of the voltages of the multiple cells in real time, and when the minimum value of the voltages of the multiple cells reaches 3.45V, obtain the charging time, and when the charging time is greater than or equal to 10min, execute the second charging method; when the charging time is less than 10min, discharge the battery module with a first constant power P, detect the minimum value of the voltages of the multiple cells in real time, and when the minimum value of the voltages of the multiple cells reaches 3V, obtain the second discharge time, and when the second discharge time is greater than or equal to 10min, execute the second charging method; and when the second discharge time is less than 10min, execute the first charging method, wherein the first charging method may be a charging means for ternary materials in the related art, and the second charging method may be a charging means for lithium iron phosphate materials in the related art.

[0025] The length of the charging time is judged according to the charging method, if the charging time is long, it indicates that the material system of the battery module is low and the amount of power is large, and the second charging method is selected. If the charging time is short, the discharge time needs to be judged again, if the discharge time is long, it indicates that the material system of the battery module is low and the amount of power is large, and the second charging method is selected. Conversely, if the discharge time is short, it indicates that the material system of the battery is high and the amount of power is small, and the first charging method is selected.

[0026] The first charging method and the second charging method will be described in detail below.

[0027] According to an embodiment of the present application, both the first charging method and the second charging method include: obtaining a core temperature of the battery module; not charging if the core temperature is lower than 0°C; charging the battery module with a third constant power if the core temperature is equal to or higher than 0°C and lower than 10°C; reducing the charging current to 0.6 times the current when the maximum value of the voltage of the cells in the battery module reaches a sixth preset value; charging the battery module with the third constant power until the current reaches a seventh preset value; reducing the charging current to 0.6 times the current when the maximum value of the voltage of the cells in the battery module reaches a sixth preset value; and repeatedly performing the operation of reducing the charging current to 0.6 times the current, and charging at the seventh preset value until the maximum value of the voltage of the multiple cells in the battery module reaches the cut-off voltage; when the core temperature is greater than or equal to 10° C. and less than 20° C., charging the battery module at the fourth constant power, and when the maximum value of the voltage of the multiple cells in the battery module reaches the eighth preset value, reducing the charging current to 0.6 times the current, and charging the battery module at the fourth constant power until the current reaches the seventh preset value; and repeatedly performing the operation of reducing the charging current to 0.6 times the current current when the maximum value of the voltage of the cells in the battery module reaches an eighth preset value, and charging at the seventh preset value until the maximum value of the voltage of the cells in the battery module reaches a cut-off voltage; when the core temperature is greater than or equal to 20° C. and less than 35° C., charging the battery module at the first constant power, and reducing the charging current to 0.6 times the current current when the maximum value of the voltage of the cells in the battery module reaches a ninth preset value, and charging at the first constant power until the current reaches the seventh preset value. and when the maximum value of the voltage of the multiple cells in the battery module reaches a ninth preset value, repeatedly execute the operation of reducing the charging current to 0.6 times the current current, and charge at the seventh preset value until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage; and when the core temperature is greater than or equal to 35°C and less than 45°C, charge the battery module at a second constant power, and when the maximum value of the voltage of the multiple cells in the battery module reaches a ninth preset value, reduce the charging current to 0.6 times the current current.the charging current is reduced to 0.6 times the current, and charging the battery module at the second constant power until the current reaches a seventh preset value, and when the maximum value of the voltage of the multiple cells in the battery module reaches a ninth preset value, repeatedly execute the operation of reducing the charging current to 0.6 times the current, and charging until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage at the seventh preset value; if the core temperature is greater than or equal to 45°C and less than 50°C, charging the battery module at a fifth constant power, and when the maximum value of the voltage of the multiple cells in the battery module reaches the ninth preset value, repeatedly execute the operation of reducing the charging current to 0.6 times the current, and charging the battery module at the fifth constant power until the current reaches the seventh preset value, and when the maximum value of the voltage of the multiple cells in the battery module reaches the ninth preset value, repeatedly execute the operation of reducing the charging current to 0.6 times the current, and charging until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage at the seventh preset value; and if the core temperature is greater than or equal to 50°C, not charging. .

[0028] The seventh preset value is 0.1C, the first constant power is 1P, the second constant power is 0.5P, the third constant power is 0.15P, the fourth constant power is 0.3P, the fifth constant power is 0.2P, where P is the nominal energy value of the battery module; in the first charging method, the sixth preset value is 3.95V, the eighth preset value is 4.00V, the ninth preset value is 4.10V, and the cut-off voltage is 4.15V; in the second charging method, the sixth preset value is 3.40V, the eighth preset value is 3.45V, the ninth preset value is 3.5V, and the cut-off voltage is 3.6V.

[0029] That is, the core temperature of the battery module is T, and the steps of the first charging method are as follows:

[0030] If T<0° C., charging is not permitted.

[0031] If 0≦T<10℃, charge the battery module with a constant power of 0.15*1P until the maximum voltage of the cells in the battery module reaches 3.95V, then execute the operation of reducing the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.15*1P until the maximum voltage of the cells in the battery module reaches 3.95V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the constant power of 0.15*1P until the maximum voltage of the cells in the battery module reaches 3.95V, and then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 4.15V.

[0032] If 10≦T<20℃, charge the battery module with a constant power of 0.3*1P until the maximum voltage of the cells in the battery module reaches 4.00V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.3*1P until the maximum voltage of the cells in the battery module reaches 4.00V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.3*1P until the maximum voltage of the cells in the battery module reaches 4.00V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 4.15V.

[0033] If 20≦T<35℃, charge the battery module with a constant power of 1P until the maximum voltage of the cells in the battery module reaches 4.10V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 1P until the maximum voltage of the cells in the battery module reaches 4.10V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the constant power of 1P until the maximum voltage of the cells in the battery module reaches 4.10V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 4.15V.

[0034] If 35≦T<45℃, charge the battery module with a constant power of 0.5*1P until the maximum voltage of the cells in the battery module reaches 4.10V, then execute the operation of reducing the charging current to 0.6 times the current (I=0.6I0), and execute the operation of reducing the charging current to 0.6 times the current (I=0.6I0), and execute the operation of charging the battery module with a constant power of 0.5*1P until the maximum voltage of the cells in the battery module reaches 4.10V, and execute the operation of reducing the charging current to 0.6 times the current (I=0.6I0), and execute the operation of charging with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 4.15V.

[0035] If 45≦T<50℃, charge the battery module with a constant power of 0.2*1P until the maximum voltage of the cells in the battery module reaches 4.10V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.2*1P until the maximum voltage of the cells in the battery module reaches 4.10V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.2*1P until the maximum voltage of the cells in the battery module reaches 4.10V, and then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 4.15V.

[0036] If T≧50° C., charging is not permitted.

[0037] The steps of the second charging method are as follows.

[0038] If T<0° C., charging is not permitted.

[0039] If 0≦T<10℃, charge the battery module with a constant power of 0.15*1P until the maximum voltage of the cells in the battery module reaches 3.40V, then execute the operation of reducing the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.15*1P until the maximum voltage of the cells in the battery module reaches 3.40V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the constant power of 0.15*1P until the maximum voltage of the cells in the battery module reaches 3.40V, and then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 3.6V.

[0040] If 10≦T<20℃, charge the battery module with a constant power of 0.3*1P until the maximum voltage of the cells in the battery module reaches 3.45V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.3*1P until the maximum voltage of the cells in the battery module reaches 3.45V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.3*1P until the maximum voltage of the cells in the battery module reaches 3.45V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 3.6V.

[0041] If 20≦T<35°C, charge the battery module with a constant power P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 3.6V.

[0042] If 35≦T<45℃, charge the battery module with a constant power of 0.5*1P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current until the charging current is 0.6 times the current (I=0.6I0), and repeat the cycle of charging the battery module with a constant power of 0.5*1P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current until the charging current is 0.6 times the current (I=0.6I0), and repeat the cycle of charging the battery module with a constant power of 0.5*1P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current until the charging current is 0.6 times the current (I=0.6I0), and repeat the cycle of charging the battery module with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 3.6V.

[0043] If 45≦T<50℃, charge the battery module with a constant power of 0.2*1P until the maximum voltage of the cells in the battery module reaches 3.5V, then execute the operation of reducing the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with a constant power of 0.2*1P until the maximum voltage of the cells in the battery module reaches 3.5V, then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging the battery module with the constant power of 0.2*1P until the maximum voltage of the cells in the battery module reaches 3.5V, and then reduce the charging current to 0.6 times the current (I=0.6I0), and repeat the operation of charging with the current until the maximum voltage of the cells in the battery module reaches the cut-off voltage of 3.6V.

[0044] If T≧50° C., charging is not permitted.

[0045] As shown in Figures 2 and 3, the battery module is charged at different constant powers under different temperatures. When the maximum voltage of the cells in the battery module reaches a certain voltage value, the charging current begins to be reduced, and the charging of the battery module is repeatedly performed. The charging current is reduced until the maximum voltage of the cells in the battery module reaches this voltage value and the charging current reaches a certain current value. Charge at this current value until the maximum voltage of the cells reaches a cut-off voltage, and then stop charging. The charging method of constantly reducing the current is advantageous to improving the performance of the battery module, reducing the risk of lithium precipitation, and extending the service life of the battery.

[0046] In addition, when the core temperature of the battery module is lower than 0°C and higher than 50°C, charging will not be performed to protect the battery module.

[0047] In the above embodiment, the constant power 1P is defined as the battery module discharges to the power magnitude of the cut-off voltage within 1h, which is numerically equal to the nominal energy value of the battery module. The preset values ​​in this application are examples.

[0048] As shown in Fig. 4, the dashed line in Fig. 4 is the battery performance curve of the battery charged by the normal charging method, and the solid line is the battery performance curve of the battery charged by the charging method of the embodiment of the present application, and as can be seen from Fig. 4, the capacity retention rate of the battery charged by the charging method of the embodiment of the present application is much better than that of the battery charged by the normal charging method at the same number of cycles. That is, the charging method of the embodiment of the present application reduces the charging current at a high state of charge (SOC), thereby improving the transport capacity of lithium ions, reducing the polarization internal resistance, and reducing the risk of lithium precipitation. As can be seen from Fig. 4, the charging method of the embodiment of the present application improves cycle performance, extends the service life of the product, and effectively improves safety compared to the method of directly charging to the cutoff voltage.

[0049] Thus, the charging method according to the embodiment of the present application can be adapted to an intelligent detection means, and can intelligently judge the material system and execute the charging method. In addition, the use of multi-temperature band and multi-voltage band monitoring helps to improve the safety of the battery. In this way, the charging efficiency of the battery is improved, the charging time is shortened, and the user experience is improved. The characteristics of the lithium battery are fully utilized, and safety issues such as lithium precipitation are not caused, and the cycle life is improved. The charging method according to the embodiment of the present application improves the charging efficiency, shortens the charging time, and reduces the power consumption due to heat generation, thereby improving the safety and service life of the battery.

[0050] FIG. 5 is a block diagram of a charging device for a storage power source according to an embodiment of the present application. As shown in FIG. 5, the charging device for the storage power source includes: The battery module includes a cell voltage acquisition module 101 configured to acquire the voltages of each of a plurality of cells in a battery pack of the battery module, and a method selection module 102 configured to select a corresponding charging method based on the magnitude of the minimum value among the voltages of the plurality of cells to charge the battery module, where the charging methods include a first charging method and a second charging method.

[0051] According to one embodiment of the present application, the method selection module 102 includes: and a first execution module configured to execute the first charging method when a minimum value among the voltages of the plurality of cells is equal to or greater than a first preset value.

[0052] According to one embodiment of the present application, the method selection module 102 includes: and a second execution module configured to discharge the battery module at a first constant power when a minimum value of the voltages of the plurality of cells is equal to or greater than a second preset value and less than a first preset value, obtain a first discharge time when the minimum value of the voltages of the plurality of cells is a third preset value, execute the second charging method when the first discharge time is equal to or greater than the first preset time, and execute the first charging method when the first discharge time is less than the first preset time.

[0053] According to one embodiment of the present application, the method selection module 102 includes: a third execution module configured to: charge the battery module with a second constant power when a minimum value of the voltages of the plurality of cells is equal to or greater than a fourth preset value and less than a second preset value; obtain a charging time when a minimum value of the voltages of the plurality of cells is a fifth preset value, and perform a second charging method when the charging time is equal to or greater than the second preset time; discharge the battery module with a first constant power when the charging time is less than the second preset time; obtain a second discharging time when a minimum value of the voltages of the plurality of cells is a third preset value, and perform the second charging method when the second discharging time is equal to or greater than the second preset time;

[0054] According to one embodiment of the present application, the method selection module 102 includes: Obtain a core temperature of the battery module, do not charge if the core temperature is lower than 0°C, charge the battery module with a third constant power if the core temperature is equal to or higher than 0°C and lower than 10°C, reduce a charging current to 0.6 times a current current if a maximum value of a voltage of a plurality of cells in the battery module reaches a sixth preset value, charge the battery module with the third constant power until the charging current reaches a seventh preset value, reduce the charging current to 0.6 times a current current if a maximum value of a voltage of a plurality of cells in the battery module reaches a sixth preset value, repeat the operation of reducing the charging current to 0.6 times the current, and charging at the seventh preset value until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage; when the core temperature is greater than or equal to 10°C and less than 20°C, charge the battery module with a fourth constant power; when the maximum value of the voltage of the multiple cells in the battery module reaches an eighth preset value, reduce the charging current to 0.6 times the current, and charge the battery module with the fourth constant power until the charging current reaches the seventh preset value; When the maximum value of the voltage of the cells in the battery module reaches the 8th preset value, repeatedly perform the operation of reducing the charging current to 0.6 times the current current; charging at the 7th preset value until the maximum value of the voltage of the cells in the battery module reaches a cut-off voltage; when the core temperature is greater than or equal to 20° C. and less than 35° C., charging the battery module at a first constant power; when the maximum value of the voltage of the cells in the battery module reaches a 9th preset value, reducing the charging current to 0.6 times the current current; and charging at the first constant power until the charging current reaches the 7th preset value. charge the battery module with a second constant power, and when the maximum value of the voltage of the multiple cells in the battery module reaches the ninth preset value, repeatedly perform the operation of reducing the charging current to 0.6 times the current current; charge with the seventh preset value until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage; when the core temperature is greater than or equal to 35°C and less than 45°C, charge the battery module with a second constant power, and when the maximum value of the voltage of the multiple cells in the battery module reaches the ninth preset value, reduce the charging current to 0.6 times the current current.6 times, charge the battery module with a second constant power until the charging current reaches a seventh preset value, and when the maximum value of the voltage of the multiple cells in the battery module reaches the ninth preset value, repeatedly execute the operation of reducing the charging current to 0.6 times the current, charge the battery module with the seventh preset value until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage, and when the core temperature is greater than or equal to 45° C. and less than 50° C., charge the battery module with a fifth constant power, and when the maximum value of the voltage of the multiple cells in the battery module reaches the ninth preset value, repeatedly execute the operation of reducing the charging current to 0.6 times the current, charge the battery module with the seventh preset value until the maximum value of the voltage of the multiple cells in the battery module reaches a cut-off voltage, and when the core temperature is greater than or equal to 45° C. and less than 50° C. and charging the battery module at the fifth constant power until the charging current reaches a seventh preset value, and repeating the operation of reducing the charging current to 0.6 times the current current when the maximum value of the voltage of the plurality of cells in the battery module reaches the ninth preset value, charging at the seventh preset value until the maximum value of the voltage of the plurality of cells in the battery module reaches a cut-off voltage, and not charging when the core temperature is 50° C. or higher.

[0055] According to an embodiment of the present application, the seventh preset value is 0.1C, the first constant power is 1P, the second constant power is 0.5P, the third constant power is 0.15P, the fourth constant power is 0.3P, and the fifth constant power is 0.2P, where P is the nominal energy value of the battery module; in the first charging method, the sixth preset value is 3.95V, the eighth preset value is 4.00V, the ninth preset value is 4.10V, and the cut-off voltage is 4.15V; and in the second charging method, the sixth preset value is 3.40V, the eighth preset value is 3.45V, the ninth preset value is 3.5V, and the cut-off voltage is 3.6V.

[0056] According to one embodiment of the present application, the first preset value is 3.6V.

[0057] According to one embodiment of the present application, the first preset value is 3.6V, the second preset value is 3.4V, the third preset value is 3V, the first preset time is 30min, and the first constant power is P, where P is the nominal energy value of the battery module.

[0058] According to one embodiment of the present application, the second preset value is 3.4V, the third preset value is 3V, the fourth preset value is 2.0V, the fifth preset value is 3.45V, the second preset time is 10min, and the second constant power is 0.5P, where P is the nominal energy value of the battery module.

[0059] The above device can implement the method for charging a storage power source described in any of the embodiments of the present application, and the contents already described in the above embodiments will not be described again here.

[0060] FIG. 6 is a structural schematic diagram of an electronic device according to an embodiment of the present application. As shown in FIG. 6, the electronic device 10 includes: The present invention comprises at least one processor and a memory communicatively connected to the at least one processor, wherein a computer program executable by the at least one processor is stored in the memory, and the computer program is executed by the at least one processor such that the at least one processor performs a method for charging a storage power source described in any of the embodiments of the present application.

[0061] An embodiment of the present application further provides a computer-readable storage medium, in which computer instructions are stored, and the computer instructions are used to realize the method for charging a storage power source according to any embodiment of the present application when executed by a processor. The storage medium may be a non-transitory storage medium.

[0062] 6 is a structural schematic diagram that can be used to implement an electronic device 10 according to an embodiment of the present application. The electronic device is intended to represent many forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The components, their connections and relationships, and their functions as shown herein are merely examples and are not intended to limit the practice of the present application as described and / or claimed herein.

[0063] As shown in Fig. 6, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which a computer program that can be executed by the at least one processor is stored, and the processor 11 can perform various appropriate operations and processes according to the computer program stored in the ROM 12 or loaded from a storage unit 18 into the RAM 13. The RAM 13 may store various programs and data required for the operation of the electronic device 10. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0064] A number of components in the electronic device 10 are connected to an I / O interface 15, including an input unit 16 such as a keyboard, a mouse, etc., an output unit 17 such as various types of displays, speakers, etc., a storage unit 18 such as a magnetic disk, an optical disk, etc., and a communication unit 19 such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 enables the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or a number of telecommunication networks.

[0065] Processor 11 may be a general-purpose and / or special-purpose processing assembly having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphic Processing Unit (GPU), various special-purpose Artificial Intelligence (AI) computing chips, various processors that execute machine learning model algorithms, a Digital Signal Processor (DSP), or any suitable processor, controller, microcontroller, etc. Processor 11 executes the methods and processes described above, such as the method of charging the storage power source.

[0066] In some embodiments, the method for charging a storage power source can be realized as a computer program and tangibly included in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed in the electronic device 10 via the ROM 12 and / or the communication unit 19. The computer program, when loaded into the RAM 13 and executed by the processor 11, can perform one or more steps of the method for charging a storage power source described above. Alternatively, in other embodiments, the processor 11 can be configured to perform the method for charging a storage power source using any other suitable means (e.g., relying on firmware).

[0067] Various embodiments of the systems and techniques described herein above may be implemented in digital electronic circuitry systems, integrated circuit systems, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Parts (ASSPs), System on Chip (SOCs), Complex Programmable Logic Devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may be implemented in one or more computer programs that may be executed and / or interpreted in a programmable system that includes at least one programmable processor, which may be a special purpose or general purpose programmable processor, and that may receive data and instructions from a storage system, at least one input device, and at least one output device, and that may transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0068] Computer programs for implementing the methods according to the present application can be programmed using any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, a special purpose computer or other programmable data processing apparatus, such that the computer programs, when executed by the processor, perform the functions / operations shown in the flowcharts and / or block diagrams. The computer programs can be entirely executed on a machine, partly executed on a machine, partly executed on a machine as a separate software package and partly executed on a remote machine, or entirely executed on a remote machine or server.

[0069] In the context of this application, a computer-readable storage medium may be a tangible medium, and may contain or store a computer program for use in, or in combination with, an instruction execution system, device, or apparatus. A computer-readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the above. Optionally, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include one or more wire-based electrical connections, portable computer disks, hard disks, RAM, ROM, erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0070] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having a display device (e.g., a Cathode Ray Tube (CRT) or Liquid Crystal Display (LCD) monitor) for displaying information to a user, and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other types of devices can also provide interaction with a user, for example, the feedback provided to the user can be any form of sensing feedback (e.g., visual feedback, auditory feedback, or haptic feedback) and can receive input from the user in any form (including acoustic input, speech input, and haptic input).

[0071] The systems and techniques described herein may be implemented in a computing system including a back-end component (e.g., a data server), a computing system including a middleware component (e.g., an application server), a computing system including a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user interacts with the embodiments of the systems and techniques described herein), or a computing system including any combination of the back-end, middleware, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0072] The computer system may include a client terminal and a server. The client terminal and the server are generally remote from each other and usually interact with each other through a communication network. The relationship between the client terminal and the server is generated by a computer program running on a corresponding computer and having a client terminal-server relationship with each other. The server may be a cloud server, also called a cloud computing server or cloud host, which is a host product in a cloud computing service system, and solves the shortcomings of difficult management and weak business scalability that exist in traditional physical hosts and VPS services (abbreviated as "VirtuaL Private Server", or "VPS").

[0073] As described above, the present invention provides a charging method, device, equipment, and medium for a storage power source, which includes the steps of: acquiring the voltages of the cells in a battery pack of a battery module; and selecting a corresponding charging method based on the minimum value of the voltages of the cells to charge the battery module, the charging method including a first charging method and a second charging method. In this way, the charging efficiency is improved, the charging time is shortened, and the power consumption due to heat generation is reduced, thereby improving the safety and service life of the battery.

[0074] It should be understood that steps can be rearranged, added, or deleted using the various forms of flow shown above. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, but this specification is not limited thereto, as long as the technical solution disclosed in this application can achieve the desired results.

[0075] [CROSS REFERENCE TO RELATED APPLICATIONS]

[0076] This application claims priority to a Chinese patent application filed with the China Patent Office on April 12, 2022, bearing application number 202210382239.4, the entire contents of which are incorporated herein by reference.

Claims

1. A method for charging a storage power source, comprising: obtaining a voltage of each of a plurality of cells in a battery pack of the battery module; selecting a corresponding charging method based on a minimum value among the voltages of the plurality of cells to charge the battery module, the charging method including a first charging method and a second charging method; The step of selecting a corresponding charging method based on the magnitude of the minimum value among the voltages of the plurality of cells includes: a step of discharging the battery module at a first constant power when a minimum value of the voltages of the plurality of cells is equal to or greater than a second preset value and smaller than a first preset value, and a step of obtaining a first discharge time when the minimum value of the voltages of the plurality of cells is a third preset value; a step of performing the second charging method when the first discharge time is equal to or greater than the first preset time; and a step of performing the first charging method when the first discharge time is smaller than the first preset time.

2. The step of selecting a corresponding charging method based on the magnitude of the minimum value of the voltages of the plurality of cells includes:

2. The method of charging a storage power source according to claim 1, further comprising the step of: executing the first charging method when a minimum value among the voltages of the plurality of cells is equal to or greater than the first preset value.

3. The step of selecting a corresponding charging method based on the magnitude of the minimum value of the voltages of the plurality of cells includes:

2. The charging method of claim 1, comprising: charging the battery module with a second constant power when a minimum value of the voltages of the plurality of cells is equal to or greater than a fourth preset value and smaller than the second preset value, and acquiring a charging time when the minimum value of the voltages of the plurality of cells is a fifth preset value; executing the second charging method when the charging time is equal to or greater than the second preset time; discharging the battery module with the first constant power when the charging time is smaller than the second preset time, and acquiring a second discharging time when the minimum value of the voltages of the plurality of cells is the third preset value; executing the second charging method when the second discharging time is equal to or greater than the second preset time; and executing the first charging method when the second discharging time is smaller than the second preset time.

4. Both the first charging method and the second charging method include: obtaining a core temperature of the battery module; not charging if the core temperature is less than 0°C; charging the battery module with a third constant power when the core temperature is greater than or equal to 0° C. and less than 10° C.; when the maximum value of the voltages of the cells in the battery module reaches a sixth preset value, reducing the charging current to 0.6 times the current current; charging the battery module with the third constant power until the charging current reaches a seventh preset value; when the maximum value of the voltages of the cells in the battery module reaches the sixth preset value, reducing the charging current to 0.6 times the current current; repeatedly performing the above operation; charging at the seventh preset value until the maximum value of the voltages of the cells in the battery module reaches a cut-off voltage; charging the battery module with a fourth constant power when the core temperature is greater than or equal to 10° C. and less than 20° C.; when the maximum value of the voltages of the cells in the battery module reaches an eighth preset value, reducing the charging current to 0.6 times the current current; charging the battery module with the fourth constant power until the charging current reaches a seventh preset value; when the maximum value of the voltages of the cells in the battery module reaches the eighth preset value, reducing the charging current to 0.6 times the current current; repeatedly performing the operation; charging with the seventh preset value until the maximum value of the voltages of the cells in the battery module reaches a cut-off voltage; when the core temperature is greater than or equal to 20° C. and less than 35° C., charging the battery module with the first constant power; when the maximum value of the voltages of the cells in the battery module reaches a ninth preset value, reducing the charging current to 0.6 times the current current; charging the battery module with the first constant power until the charging current reaches a seventh preset value; when the maximum value of the voltages of the cells in the battery module reaches the ninth preset value, reducing the charging current to 0.6 times the current current; repeatedly performing the operation; charging with the seventh preset value until the maximum value of the voltages of the cells in the battery module reaches a cut-off voltage; charging the battery module with a second constant power when the core temperature is greater than or equal to 35° C. and less than 45° C.; when the maximum value of the voltages of the cells in the battery module reaches a ninth preset value, reducing the charging current to 0.6 times the current current; charging the battery module with the second constant power until the charging current reaches a seventh preset value; when the maximum value of the voltages of the cells in the battery module reaches the ninth preset value, reducing the charging current to 0.6 times the current current; repeatedly performing the operation; charging with the seventh preset value until the maximum value of the voltages of the cells in the battery module reaches a cut-off voltage; when the core temperature is greater than or equal to 45°C and less than 50°C, charging the battery module with a fifth constant power, when the maximum value of the voltage of the cells in the battery module reaches a ninth preset value, reducing the charging current to 0.6 times the current current, charging the battery module with the fifth constant power until the charging current reaches a seventh preset value, when the maximum value of the voltage of the cells in the battery module reaches the ninth preset value, repeatedly performing the operation of reducing the charging current to 0.6 times the current current, charging with the seventh preset value until the maximum value of the voltage of the cells in the battery module reaches a cut-off voltage; The method for charging a storage power source according to claim 1 , further comprising the step of: not charging if the core temperature is 50° C. or higher.

5. The seventh preset value is 0.1C, the first constant power is 1P, the second constant power is 0.5P, the third constant power is 0.15P, the fourth constant power is 0.3P, and the fifth constant power is 0.2P, where P is a nominal energy value of the battery module; In the first charging method, the sixth preset value is 3.95V, the eighth preset value is 4.00V, the ninth preset value is 4.10V, and the cut-off voltage is 4.15V; 5. The method for charging a storage power source according to claim 4, wherein in the second charging method, the sixth preset value is 3.40V, the eighth preset value is 3.45V, the ninth preset value is 3.5V, and the cut-off voltage is 3.6V.

6. 3. The method of claim 2, wherein said first preset value is 3.6V.

7. 2. The charging method for a storage power source as claimed in claim 1, wherein the first preset value is 3.6V, the second preset value is 3.4V, the third preset value is 3V, the first preset time is 30min, and the first constant power is P, where P is a nominal energy value of the battery module.

8. 4. The charging method for a storage power source as claimed in claim 3, wherein the second preset value is 3.4V, the third preset value is 3V, the fourth preset value is 2.0V, the fifth preset value is 3.45V, the second preset time is 10min, and the second constant power is 0.5P, where P is a nominal energy value of the battery module.

9. A charging device for a storage power source, a cell voltage acquisition module configured to acquire voltages of each of a plurality of cells in a battery pack of the battery module; A method selection module is configured to select a corresponding charging method according to a minimum value among the voltages of the plurality of cells to charge the battery module, the charging method including a first charging method and a second charging method; the method selection module is configured to discharge the battery module at a first constant power when a minimum value of the voltages of the plurality of cells is equal to or greater than a second preset value and less than a first preset value, obtain a first discharge time when the minimum value of the voltages of the plurality of cells is a third preset value, perform the second charging method when the first discharge time is equal to or greater than the first preset time, and perform the first charging method when the first discharge time is less than the first preset time.

10. An electronic device, At least one processor; a memory communicatively coupled to the at least one processor; An electronic device, wherein a computer program executable by the at least one processor is stored in the memory, and the computer program is executed by the at least one processor so that the at least one processor executes the method for charging a storage power source according to any one of claims 1 to 8.

11. A computer-readable storage medium having computer instructions stored therein, the computer instructions being used to realize the method for charging a storage power source according to any one of claims 1 to 8 when executed by a processor.

Images