Charging methods, devices, computer equipment, and storage media

Abstract

This application relates to a charging method, apparatus, computer device, storage medium, and computer program product. The method includes: responding to a charging command, acquiring the current charging current of a battery to be charged, charging the battery to be charged according to the current charging current, monitoring charging characteristic parameters during the charging process, and, if it is determined based on the charging characteristic parameters that the current charging current needs to be updated, updating the current charging current based on a preset step size until the battery's charge level reaches a preset charge level. This method can maximize the battery's charging capacity, effectively shorten charging time, and improve charging efficiency.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a charging method, apparatus, computer equipment, storage medium, and computer program product. Background Technology

[0002] Lithium-ion batteries, as the power source for electric vehicles and the main energy storage form in power systems, have become a research hotspot. Compared with other types of batteries, lithium-ion batteries have superior performance characteristics such as high energy and power density and low self-discharge rate. Appropriate charging methods can not only improve battery charging performance and extend battery life, but also enhance battery safety. With the widespread application of lithium batteries, research on optimal charging strategies is receiving increasing attention.

[0003] Currently, common charging methods mainly include constant current charging and constant voltage charging. However, when the battery is in a high or low state of charge, excessive charging current can affect the battery's charging performance and prolong the charging time. Using multi-stage constant current charging methods, repeatedly using lower currents can also lead to longer charging times and lower charging efficiency.

[0004] Therefore, a more efficient charging method is needed. Summary of the Invention

[0005] Therefore, it is necessary to provide an efficient charging method, apparatus, computer equipment, computer-readable storage medium, and computer program product to address the aforementioned technical problems.

[0006] Firstly, this application provides a charging method. The method includes:

[0007] Respond to the charging command and obtain the current charging current of the battery to be charged;

[0008] The battery to be charged is charged according to the current charging current, and the charging characteristic parameters during the charging process are monitored.

[0009] If the current charging current needs to be updated based on the charging characteristic parameters, the current charging current is updated based on the preset step size until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0010] The technical solution in this application differs from traditional constant current charging or constant voltage charging. It acquires the current charging current and monitors charging characteristic parameters during the charging process. If the current charging current needs updating based on these parameters, it updates the current charging current and continues charging the battery with the updated current. This process is repeated until the battery is fully charged. This solution, by monitoring charging characteristic parameters and continuously updating the current charging current, can maximize the battery's charging capacity while balancing battery life and safety, minimizing charging time and improving charging efficiency.

[0011] In some embodiments, obtaining the current charging current of the battery to be charged includes:

[0012] Obtain the remaining lifespan of the battery to be charged;

[0013] The current charging current of the battery to be charged is determined based on the remaining lifespan and the preset maximum allowable charging current.

[0014] In the technical solution of this application embodiment, the current charging current of the battery to be charged is determined according to the remaining lifespan and the preset maximum allowable charging current. This fully considers the remaining lifespan and safety of the battery, and can maximize the charging capacity of the battery under different states and lifespans while taking into account both battery lifespan and safety, thereby shortening the charging time as much as possible and improving charging efficiency.

[0015] In some embodiments, obtaining the current charging current of the battery to be charged includes:

[0016] Get the charging current when the battery to be charged was last charged to the preset charge level;

[0017] If the charging current differs from the preset cutoff current, the charging current will be determined as the current charging current of the battery to be charged.

[0018] In the technical solution of this application embodiment, by calling the charging strategy of the previous charge, the charging current of the non-cutoff current when the battery to be charged was charged to the preset charge level in the previous charge is determined as the current charging current. While quickly determining the current charging current, the battery life and safety can also be taken into account, and the battery to be charged is charged with the maximum charging capacity that it can withstand, thereby effectively shortening the charging time and improving the charging efficiency.

[0019] In some embodiments, obtaining the current charging current of the battery to be charged includes:

[0020] The maximum allowable charging current of the battery to be charged is determined as the current charging current of the battery to be charged.

[0021] In the technical solution of this application embodiment, by determining the maximum allowable charging current of the battery to be charged as the current charging current of the battery to be charged, the battery can be charged directly with the maximum charging current that it can withstand, which greatly shortens the charging time and improves the charging efficiency.

[0022] In some embodiments, the charging characteristic parameters include the anode potential;

[0023] The method also includes:

[0024] If the anode potential is not greater than the preset anode potential threshold, reduce the current charging current.

[0025] In the technical solution of this application embodiment, by monitoring the anode potential of the battery to be charged during the charging process, and reducing the charging current when the anode potential is lower than or equal to a preset anode potential threshold, the lithium plating reaction of the battery can be effectively prevented, thereby achieving lithium plating protection for the battery.

[0026] In some embodiments, charging characteristic parameters include local temperature;

[0027] The method also includes:

[0028] If the local temperature is not lower than the preset local temperature threshold, the battery to be charged is cooled.

[0029] In the technical solution of this application embodiment, the local temperature of the battery is used as the monitoring point. During the charging process, if the local temperature of the battery is not lower than the preset local temperature threshold, the battery is cooled down, which can effectively reduce the risk of thermal runaway of the battery.

[0030] In some embodiments, cooling the battery to be charged includes at least one of the following:

[0031] First item:

[0032] Reduce the current charging current;

[0033] Second item:

[0034] The battery to be charged is cooled by a cooling device.

[0035] In the technical solution of this application embodiment, by setting multiple cooling treatment methods, it is possible to flexibly cope with situations where the local temperature of the battery to be charged is higher than a preset local temperature threshold.

[0036] In some embodiments, the method further includes:

[0037] If, after cooling the battery, the local temperature of the battery is still not lower than the preset local temperature threshold, charging is stopped.

[0038] If the duration of the charging stop is greater than or equal to the preset charging stop duration, the battery to be charged is charged according to the current charging current, and the charging characteristic parameters during the charging process are monitored.

[0039] In the technical solution of this application embodiment, if the local temperature of the battery to be charged is still not lower than a preset local temperature threshold after the cooling treatment, stopping charging can ensure that the local temperature of the battery can be effectively reduced, thereby reducing the risk of thermal runaway.

[0040] In some embodiments, charging characteristic parameters include charging voltage;

[0041] The method also includes:

[0042] When the charging voltage reaches the preset cutoff voltage, the battery to be charged is charged under constant voltage until the charge of the battery to be charged reaches the preset charge.

[0043] In the technical solution of this application embodiment, the local temperature of the battery is used as the monitoring point. During the charging process, if the local temperature of the battery is not lower than the preset local temperature threshold, the battery is cooled down, which can effectively reduce the risk of thermal runaway of the battery.

[0044] Secondly, this application also provides a charging device. The device includes:

[0045] The charging current acquisition module is used to respond to charging commands and acquire the current charging current of the battery to be charged.

[0046] The charging module is used to charge the battery to be charged according to the current charging current.

[0047] The current update module is used to update the current charging current when it is determined that the current charging current needs to be updated based on the charging characteristic parameters. It then wakes up the charging module to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0048] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the charging method described above.

[0049] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the charging method described above.

[0050] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of the charging method described above.

[0051] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0052] Figure 1 This is a diagram illustrating the application environment of the charging method in some embodiments of this application;

[0053] Figure 2 This is a flowchart illustrating the charging method in some embodiments of this application;

[0054] Figure 3 This is a flowchart illustrating the charging method in some other embodiments of this application;

[0055] Figure 4 This is a flowchart illustrating the charging method in some embodiments of this application;

[0056] Figure 5 This is a detailed flowchart illustrating the charging method in some embodiments of this application;

[0057] Figure 6 The following is a detailed flowchart illustrating the charging method in other embodiments of this application;

[0058] Figure 7 This is a structural block diagram of the charging device in some embodiments of this application;

[0059] Figure 8 This is a detailed structural block diagram of the charging device in some other embodiments of this application;

[0060] Figure 9 This is a diagram showing the internal structure of a computer device in some embodiments of this application. Detailed Implementation

[0061] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0063] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least some of the embodiments of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] Lithium-ion batteries, as the power source for electric vehicles and the main energy storage form in power systems, have become a research hotspot. Compared with other types of batteries, lithium-ion batteries have superior performance characteristics such as high energy and power density and low self-discharge rate. Appropriate charging methods can not only improve battery charging performance and extend battery life, but also enhance battery safety. With the widespread application of lithium batteries, research on optimal charging strategies is receiving increasing attention.

[0067] Existing charging methods are diverse. For example, when charging lithium batteries, a common approach is to use a two-stage method: constant current (CC) charging and constant voltage (CV) charging. First, a constant current is used to charge the lithium battery until the cell voltage reaches its charging limit voltage. Then, this cell charging limit voltage is used for constant voltage charging, during which the charging current gradually decreases. Charging ends when the charging current decreases to the charging cutoff current, and the lithium battery cell is fully charged.

[0068] For the traditional charging methods mentioned above, the most effective way to shorten charging time is to increase the charging current. However, increasing the charging current can lead to increased polarization, extending the constant voltage charging time, and can also cause lithium plating on the negative electrode. Furthermore, when the battery is in a high or low state of charge, excessive charging current can negatively impact charging performance and prolong charging time. Using a multi-stage constant current charging method, repeatedly applying lower currents can also result in longer charging times and lower charging efficiency.

[0069] In addition to the above, the inventors have also noted that lithium-ion batteries need to balance battery life and safety during fast charging, and also need to consider the fast charging capabilities of cells with varying degrees of use. Therefore, the fast charging strategies provided by the BMS (Battery Management System) are relatively conservative. Thus, for newer batteries (with more remaining lifespan), their charging capacity is relatively surplus. However, according to the BMS's charging strategy, the charging current is relatively low, which cannot truly bring out the battery's fast charging performance.

[0070] To address the issue of low battery charging efficiency, the applicant discovered that a trial current method can be used to charge the battery at its maximum permissible charging current or a current lower than the maximum permissible current, based on the battery's state and remaining lifespan. Simultaneously, by monitoring the battery's SOC (State of Charge), voltage, anode potential, and local temperature during charging, the charging current can be adjusted. This approach balances battery lifespan and safety while maximizing the battery's charging capacity under different states and lifespans, minimizing charging time and improving charging efficiency.

[0071] Based on the above considerations, this application provides a charging method that obtains the current charging current, monitors charging characteristic parameters during the charging process based on the current charging current, and updates the current charging current when the charging characteristic parameters indicate that the current charging current needs to be updated. The updated charging current is then used to continue charging the battery, and this process is repeated until the battery is fully charged. This solution, by monitoring charging characteristic parameters and continuously updating the current charging current during the charging process, can maximize the battery's charging capacity under different charging states and lifespans while balancing battery life and safety, thereby minimizing charging time and improving charging efficiency.

[0072] The charging method provided in this application embodiment can be applied to, for example... Figure 1In the application environment shown, the battery to be charged 102 is connected to the BMS terminal 104. When the BMS terminal 104 receives a charging command from the battery to be charged, it obtains the maximum allowable current of the battery to be charged 102, determines the current charging current of the battery to be charged 102 based on the maximum allowable current, and then charges the battery to be charged 102 according to the current charging current. During the charging process, it monitors whether there are any abnormalities in the charging characteristic parameters and determines whether the current charging current needs to be updated based on the charging characteristic parameters. If the current charging current needs to be updated based on the charging characteristic parameters, it updates the current charging current and returns to the steps of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity, and the charging ends. It can be understood that the charging command for the battery to be charged can be generated by the BMS terminal or by the control unit connected to the BMS terminal, and the control unit sends the charging command to the BMS terminal, depending on the actual situation. Taking the power battery of an electric vehicle as an example, the control unit can be a VCU (Vehicle Control Unit).

[0073] In some embodiments, such as Figure 2 As shown, a charging method is provided, which is applied to Figure 1 Taking the controller in the example, the following steps are included:

[0074] Step S202: Respond to the charging command and obtain the current charging current of the battery to be charged.

[0075] The current charging current refers to the charging current applied to the battery at the current time. In practical applications, when the BMS receives a charging command from the battery, it obtains the maximum allowable current of the battery and determines the current charging current based on this maximum allowable current.

[0076] Step S204: Charge the battery to be charged according to the current charging current, and monitor the charging characteristic parameters during the charging process.

[0077] Charging characteristic parameters refer to the state-related parameters of the battery monitored during the charging process. Specifically, these may include parameters such as the battery's state of charge (SOC), voltage, anode potential, and local temperature. Once the current charging current of the battery to be charged is obtained, a charging current of equal magnitude can be applied to the battery to charge it. Since the magnitude of the charging current is crucial during battery charging, excessively large charging current can lead to increased polarization, increasing the constant-voltage charging time, and can also cause lithium plating on the negative electrode. Conversely, excessively low charging current results in longer charging times and lower efficiency. Therefore, in this embodiment, charging characteristic parameters such as SOC, voltage, anode potential, and local temperature can be monitored during the charging process to determine whether the current charging current is appropriate, whether it needs to be further increased or decreased, update the current charging current, or take other actions, such as temperature protection.

[0078] Step S206: If the current charging current needs to be updated based on the charging characteristic parameters, update the current charging current and return to step S204 until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0079] Following the previous embodiment, if the current charging current is determined to be too high or too low based on parameters such as SOC, voltage, anode potential, and local temperature, and further adjustments are needed, then the current charging current is adjusted and updated, returning to step S204, until the charge capacity of the battery to be charged reaches the preset charge capacity. Specifically, if the battery's SOC has not reached the set SOC value, the voltage has not reached the cutoff voltage, the anode potential is not lower than the preset anode potential, and the local temperature has not reached the set upper temperature limit, then it is determined that the current charging current can continue to increase. The current charging current is then increased, and the battery to be charged is further charged according to the increased charging current. Then, the process returns to step S204, continuing to monitor whether the current charging current needs adjustment and updating, until the SOC of the battery to be charged reaches the preset charge capacity. In this embodiment, the preset charge capacity can be 100%. It is understood that in other embodiments, the preset charge capacity can also be 90% or other values, depending on the actual situation, and is not limited here.

[0080] The technical solution in this application differs from traditional constant current charging or constant voltage charging. It acquires the current charging current and monitors charging characteristic parameters during the charging process. If the current charging current needs updating based on these parameters, it updates the current charging current and continues charging the battery with the updated current. This process is repeated until the battery is fully charged. This solution, by monitoring charging characteristic parameters and continuously updating the current charging current, can maximize the battery's charging capacity while balancing battery life and safety, minimizing charging time and improving charging efficiency.

[0081] like Figure 3 As shown, in some embodiments, step S202 includes: step S222, responding to a charging command, obtaining the remaining lifespan of the battery to be charged, and determining the current charging current of the battery to be charged based on the remaining lifespan and a preset maximum allowable charging current.

[0082] Remaining lifespan refers to the remaining lifespan of the battery, including data such as remaining battery capacity, number of battery cycles, and usable capacity. The maximum allowable charging current is the maximum charging current the battery can withstand. In this embodiment, the maximum allowable charging current is the current maximum charging current of the battery output by the BMS. This can be achieved by the BMS acquiring the remaining lifespan and maximum allowable charging current of the battery, and then determining the current charging current based on the remaining lifespan and the preset maximum allowable charging current. For example, a battery with a nominal capacity of 800mAh and a maximum allowable charging current of 0.5C would have a maximum allowable charging current of 800 * 0.5 = 400mA. If the remaining capacity of the battery is 50%, then considering both battery lifespan and the maximum allowable charging current, the current charging current of the battery can be lower than 400mA, such as 320mA. If the remaining capacity of the battery to be charged is 100%, indicating that the battery has a relatively surplus charging capacity, then, considering both battery life and the maximum allowable charging current, the current charging current of the battery to be charged can be determined to be 400mA, meaning the battery is charged with the maximum charging current. It is understood that in other embodiments, the current charging current can be determined in other ways, depending on the actual situation, and is not limited here.

[0083] In the technical solution of this application embodiment, the current charging current of the battery to be charged is determined according to the remaining lifespan and the preset maximum allowable charging current. This fully considers the remaining lifespan and safety of the battery, and can maximize the charging capacity of the battery under different states and lifespans while taking into account both battery lifespan and safety, thereby shortening the charging time as much as possible and improving charging efficiency.

[0084] like Figure 4 As shown, in some embodiments, obtaining the current charging current of the battery to be charged includes: step S242, responding to a charging command, obtaining the charging current when the battery to be charged was last charged to a preset charge level, and if the charging current is different from the preset cutoff current, determining the charging current as the current charging current of the battery to be charged.

[0085] In practical applications, since the battery needs to be charged multiple times, to improve charging efficiency, in this embodiment, without special charging requirements, the controller can be configured to call the previously used charging strategy each time a charging command is received. Specifically, it can first obtain the charging current when the battery was charged to a preset charge level from the charging record data. Then, it can determine whether the charging current is the cutoff current. If not, this current can be understood as the maximum charging current that the battery can withstand. In this case, the charging current when the battery was charged to the preset charge level can be used as the current charging current. Then, the battery is charged according to the current charging current. Then, the charging characteristic parameters of the battery are monitored during the charging process to determine whether the charging current needs to be adjusted. In other embodiments, the battery can be charged directly according to the previously used charging strategy until the battery reaches the preset charge level.

[0086] In the technical solution of this application embodiment, by calling the charging strategy of the previous charge, the charging current of the non-cutoff current when the battery to be charged was charged to the preset charge level in the previous charge is determined as the current charging current. While quickly determining the current charging current, the battery life and safety can also be taken into account, and the battery to be charged is charged with the maximum charging capacity that it can withstand, thereby effectively shortening the charging time and improving the charging efficiency.

[0087] In some embodiments, obtaining the current charging current of the battery to be charged includes: determining the maximum allowable charging current of the battery to be charged as the current charging current of the battery to be charged.

[0088] In this embodiment, upon receiving a charging command, the maximum allowable charging current of the battery to be charged can be obtained, and this maximum allowable charging current can be determined as the current charging current of the battery. Then, the battery is charged according to the maximum allowable charging current. Simultaneously, during the charging process, the charging characteristic parameters of the battery are monitored to determine whether the charging current needs to be adjusted.

[0089] In the technical solution of this application embodiment, by determining the maximum allowable charging current of the battery to be charged as the current charging current of the battery to be charged, the battery can be charged directly with the maximum charging current that it can withstand, which greatly shortens the charging time and improves the charging efficiency.

[0090] like Figure 5 As shown, in some embodiments, the method further includes: step S226, if the anode potential is not greater than a preset anode potential threshold, reducing the current charging current and returning to step S204 until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0091] As described in the above embodiments, the charging characteristic parameters include the anode potential. In this embodiment, the battery to be charged is a lithium-ion battery, and the preset anode potential threshold can be the lithium plating potential. The lithium plating potential refers to the potential at which the lithium-ion battery undergoes a lithium plating reaction. The potential at which the lithium plating reaction occurs is usually considered to be 0V. Since lithium-ion batteries are based on a lithium intercalation reaction, when the anode potential is lower than the potential of the reference electrode (lithium plating potential), a lithium conversion reaction will occur, producing metallic lithium. In specific implementation, the lithium plating potential can be set to 0V. During the charging process, the anode potential of the battery to be charged is monitored in real time. When the anode potential is less than or equal to 0V, it is determined that the battery to be charged may undergo a lithium plating reaction. At this time, lithium plating protection can be implemented, such as reducing the current charging current, returning to step S204, and then charging the battery to be charged according to the reduced current charging current, monitoring the charging characteristic parameters during the charging process until the charge capacity of the battery to be charged reaches the preset charge capacity. If the anode potential is greater than 0V, the next step is performed.

[0092] In the technical solution of this application embodiment, by monitoring the anode potential of the battery to be charged during the charging process, and reducing the charging current when the anode potential is lower than or equal to a preset anode potential threshold, the lithium plating reaction of the battery can be effectively prevented, thereby achieving lithium plating protection for the battery.

[0093] like Figure 5 As shown, in some embodiments, the method further includes: step S246, when the charging voltage reaches a preset cutoff voltage, performing constant voltage charging on the battery to be charged until the charge capacity of the battery to be charged reaches a preset charge capacity.

[0094] As described in the preceding embodiments, the charging characteristic parameters also include the charging voltage. Taking lithium batteries as an example, the nominal voltage of lithium batteries is 3.7V and 3.8V. In this embodiment, the cutoff voltage of the battery to be charged can be preset to 3.8V. To ensure battery performance, the battery voltage generally needs to be kept above the cutoff voltage. During the charging process of the battery to be charged, the controller monitors the charging voltage of the battery to be charged in real time and compares whether the charging voltage reaches the cutoff voltage of 3.8V. If the charging voltage reaches 3.8V, a constant voltage charging strategy is started to charge the battery to be charged at a constant voltage until the charging current reaches the cutoff current, such as 0.05C. At this time, the charge capacity of the battery to be charged has reached the preset charge capacity, and charging ends. It is understood that in other embodiments, the cutoff voltage and cutoff current of the battery to be charged can also be other values, depending on the actual state of the battery, and are not limited here.

[0095] In the technical solution of this application embodiment, by using the charging voltage as a monitoring point, constant voltage charging is performed on the battery to be charged when the charging voltage reaches the preset cutoff voltage, so as to maintain the battery's performance.

[0096] like Figure 5 As shown, in some embodiments, the method further includes: step S266, where if the local temperature is not less than a preset local temperature threshold, the battery to be charged is cooled down, and the process returns to step S204 until the charge of the battery to be charged reaches a preset charge.

[0097] As described in the above embodiments, charging characteristic parameters include local temperature. In practical applications, the inventors have found that compared to the surrounding lower temperature region, there are obvious temperature hotspots due to the locally enhanced surface exchange current density, which can induce lithium metal growth. Furthermore, local high temperature may be one of the factors leading to internal short circuits in the battery, which will further increase the temperature and increase the risk of thermal runaway. The operating temperature of conventional lithium batteries is between -20℃ and 60℃. When the operating temperature is below 0℃, the performance of lithium batteries will decrease, and the discharge capacity will also decrease accordingly. Generally speaking, the optimal operating temperature for lithium batteries is 0-40℃. Therefore, in this embodiment, the local temperature of the battery is used as the monitoring point, and the local temperature threshold of the battery can be preset to 40℃. During the charging process, the local temperature of the battery to be charged is monitored in real time. If the local temperature is greater than or equal to the preset local temperature threshold, such as 40℃, the battery to be charged is cooled to reduce the local temperature. If the local temperature is less than 40℃, no cooling treatment is performed, and the process proceeds to the next step. It is understood that in other embodiments, the local temperature threshold may be other temperature values ​​such as 50°C or 60°C, depending on the actual state of the battery, and is not limited here.

[0098] In the technical solution of this application embodiment, the local temperature of the battery is used as the monitoring point. During the charging process, if the local temperature of the battery is not lower than the preset local temperature threshold, the battery is cooled down, which can effectively reduce the risk of thermal runaway of the battery.

[0099] In other embodiments, the method further includes: if the local temperature is not less than a preset local temperature threshold, reducing the current charging current and returning to step S204 until the charge capacity of the battery to be charged reaches a preset charge capacity.

[0100] Following the previous embodiment, this embodiment takes reducing the current charging current as an example of cooling. In specific implementation, the current charging current can be reduced when the local temperature is not lower than a preset local temperature threshold. Then, return to step S204, charge the battery to be charged according to the reduced charging current, monitor the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0101] In the technical solution of this application embodiment, by reducing the current charging current when the local temperature is not lower than a preset local temperature threshold, the local temperature of the battery to be charged can be reduced simply and effectively, thereby reducing the risk of thermal runaway of the battery.

[0102] In other embodiments, the method further includes: if the local temperature is not less than a preset local temperature threshold, cooling the battery to be charged is performed by a cooling device, and the process returns to step S204 until the charge of the battery to be charged reaches a preset charge.

[0103] In this embodiment, the cooling process of the battery to be charged is taken as an example. Specifically, when the local temperature is not lower than a preset local temperature threshold, the BMS can activate a cooling device, such as a thermal management system for battery cooling, or a cooling fan to cool the battery. Then, the process returns to step S204 until the battery's charge reaches a preset charge level. Furthermore, if the local temperature is detected to be lower than the preset local temperature threshold, the process can also return to step S204 until the battery's charge reaches the preset charge level. It is understood that in other embodiments, other cooling devices can be used to cool the battery; the specific method depends on the actual configuration of the BMS and is not limited here.

[0104] In the technical solution of this application embodiment, when the local temperature is not lower than a preset local temperature threshold, a cooling device is invoked to cool the battery to be charged, thereby achieving rapid cooling of the battery.

[0105] In other embodiments, the method further includes: if the local temperature is not less than a preset local temperature threshold, reducing the current charging current and cooling the battery to be charged using a cooling device, returning to step S204, until the charge of the battery to be charged reaches a preset charge.

[0106] Following the above embodiments, in this embodiment, when the local temperature is not less than a preset local temperature threshold, the current charging current can be reduced and a cooling device such as a thermal management system for battery cooling or a cooling fan can be activated to cool the battery to be charged. When the local temperature is detected to be lower than the battery temperature, the process returns to step S204 until the charge of the battery to be charged reaches the preset charge.

[0107] In the technical solution of this application embodiment, when the local temperature is not less than a preset local temperature threshold, by reducing the current charging current and calling the cooling device to cool the battery to be charged, the battery can be cooled down more quickly.

[0108] like Figure 6 As shown, in some embodiments, the method further includes: step S268, after cooling the battery to be charged, if the local temperature of the battery to be charged is still not less than a preset local temperature threshold, stop charging; if the duration of stopping charging is greater than or equal to a preset duration of stopping charging, return to step S204 until the charge capacity of the battery to be charged reaches a preset charge capacity.

[0109] In practical applications, when the local temperature of the battery is very high, it may occur that even after reducing the current or using a cooling device, the local temperature of the battery remains higher than a preset local temperature threshold. Therefore, further cooling measures are needed to address this situation. In this embodiment, the relationship between battery temperature and the duration of charging stop can be obtained through cooling tests on the battery to be charged. The charging stop duration can be preset to ensure that the local temperature of the battery is controlled within the optimal operating temperature range. In specific implementation, if the local temperature of the battery to be charged is still not lower than the preset local threshold after cooling treatment, charging can be stopped for a period of time. That is, if the charging stop duration T1 is greater than or equal to the preset charging stop duration T0, then charging of the battery to be charged can continue at the current charging current, and the charging characteristic parameters of the battery can be monitored until the charge capacity of the battery to be charged reaches the preset charge capacity, thus completing the charging process.

[0110] In the technical solution of this application embodiment, if the local temperature of the battery to be charged is still not lower than a preset local temperature threshold after the cooling treatment, stopping charging can ensure that the local temperature of the battery can be effectively reduced, thereby reducing the risk of thermal runaway.

[0111] To provide a clearer explanation of the charging method provided in this application, the following description is provided in conjunction with the appendix. Figure 6 The following specific embodiments will be described:

[0112] Step S242: In response to the charging command, obtain the charging current when the battery to be charged was last charged to a preset charge level. If the charging current is different from the preset cutoff current, determine the charging current as the current charging current of the battery to be charged.

[0113] Step S204: Charge the battery to be charged according to the current charging current, and monitor the charging characteristic parameters during the charging process.

[0114] During the charging process, the monitored charging characteristic parameters include the battery's state of charge (SOC), voltage, anode potential, and local temperature.

[0115] In step S226, if the anode potential is not greater than the preset anode potential threshold, reduce the current charging current and return to step S204 until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0116] During charging, the anode potential of the battery to be charged is monitored in real time. When the anode voltage is less than or equal to 0V, it is determined that lithium plating may occur in the battery. In this case, lithium plating protection can be implemented, such as reducing the current charging current, returning to step S204, and then charging the battery according to the reduced current. The charging characteristic parameters during the charging process are monitored until the battery's charge capacity reaches the preset charge capacity. If the anode potential is greater than 0V, the next step is performed.

[0117] In step S246, when the charging voltage reaches the preset cutoff voltage, the battery to be charged is charged under constant voltage until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0118] The charging voltage of the battery to be charged is monitored in real time, and compared with the cutoff voltage of 3.8V. If the charging voltage reaches 3.8V, the constant voltage charging strategy is started to charge the battery to be charged at a constant voltage until the charging current reaches the cutoff current, such as 0.05C. At this time, the charge capacity of the battery to be charged has reached the preset charge capacity, and the charging ends.

[0119] In step S266, if the local temperature is not lower than the preset local temperature threshold, the battery to be charged is cooled down, and the process returns to step S204 until the charge of the battery to be charged reaches the preset charge.

[0120] During charging, the local temperature of the battery to be charged is monitored in real time. If the local temperature is greater than or equal to a preset local temperature threshold, such as 40°C, cooling treatment is performed on the battery to reduce its local temperature. If the local temperature is less than 40°C, no cooling treatment is performed, and the process proceeds to the next step. In this embodiment, cooling treatment of the battery to be charged includes at least one of the following: First, reducing the current charging current; Second, cooling treatment of the battery to be charged using a cooling device. Specifically, cooling treatment of the battery to be charged using a cooling device can be achieved by the BMS activating an internal cooling device, such as a thermal management system for battery cooling, or by a cooling fan cooling the battery to be charged.

[0121] In step S268, if the local temperature of the battery to be charged is still not lower than the preset local temperature threshold after cooling treatment, charging is stopped. If the duration of the charging stop is greater than or equal to the preset charging stop duration, the process returns to step S204 until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0122] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0123] Based on the same inventive concept, this application also provides a charging device for implementing the charging method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more charging device embodiments provided below can be found in the limitations of the charging method described above, and will not be repeated here.

[0124] In some embodiments, such as Figure 7 As shown, a charging device is provided, including: a charging current acquisition module 710, a charging module 720, and a current update module 730, wherein:

[0125] The charging current acquisition module 710 is used to acquire the current charging current of the battery to be charged in response to a charging command.

[0126] The charging module 720 is used to charge the battery to be charged according to the current charging current.

[0127] The current update module 730 is used to update the current charging current when it is determined that the current charging current needs to be updated based on the charging characteristic parameters, wake up the charging module to perform the operation of charging the battery to be charged according to the current charging current, and monitoring the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0128] The technical solution of this application differs from traditional constant current charging or constant voltage charging. It acquires the current charging current and monitors charging characteristic parameters during the charging process. When the charging characteristic parameters indicate that the current charging current needs updating, the current charging current is updated, and the battery continues to be charged with the updated charging current. This process is repeated until the battery is fully charged. This solution, by monitoring charging characteristic parameters and continuously updating the current charging current during the charging process, can maximize the battery's charging capacity under different charging states and lifespans while balancing battery life and safety, thereby minimizing charging time and improving charging efficiency.

[0129] In some embodiments, the charging current acquisition module 710 is further configured to acquire the remaining lifespan of the battery to be charged, and determine the current charging current of the battery to be charged based on the remaining lifespan and the preset maximum allowable charging current.

[0130] In some embodiments, the charging current acquisition module 710 is further configured to acquire the charging current when the battery to be charged was last charged to a preset charge level, and if the charging current is different from the preset cutoff current, the charging current is determined as the current charging current of the battery to be charged.

[0131] In some embodiments, the charging current acquisition module 710 is further configured to determine the maximum allowable charging current of the battery to be charged as the current charging current of the battery to be charged.

[0132] In some embodiments, the charging characteristic parameters include the anode potential;

[0133] The current update module 730 is also used to reduce the current charging current when the anode potential is not greater than the preset anode potential threshold, wake up the charging module 720 to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0134] In some embodiments, charging characteristic parameters include local temperature;

[0135] The current update module 730 is also used to cool down the battery to be charged when the local temperature is not lower than a preset local temperature threshold, wake up the charging module 720 to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0136] In some embodiments, the current update module 730 is further configured to reduce the current charging current when the local temperature is not less than a preset local temperature threshold, wake up the charging module 720 to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0137] like Figure 8 As shown, in some embodiments, the device further includes a cooling processing module 740 for cooling the battery to be charged using a cooling device.

[0138] In some embodiments, the cooling module 740 is further configured to stop charging when the local temperature of the battery to be charged is still not less than a preset local temperature threshold after the battery to be charged has been cooled, and to wake up the charging module 720 to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity.

[0139] In some embodiments, charging characteristic parameters include charging voltage;

[0140] like Figure 8 As shown, the device also includes a constant voltage charging module 750, which is used to perform constant voltage charging on the battery to be charged when the charging voltage reaches a preset cutoff voltage, until the charge capacity of the battery to be charged reaches a preset charge capacity.

[0141] Each module in the aforementioned charging device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0142] In some embodiments, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 9As shown, the computer device includes a processor, memory, input / output interfaces, a communication interface, a display unit, and an input device. The processor, memory, and input / output interfaces are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interfaces. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interfaces are used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a charging method. The display unit is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0143] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0144] In some embodiments, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the charging method described above.

[0145] In some embodiments, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the charging method described above.

[0146] In some embodiments, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the charging method described above.

[0147] It should be noted that the data involved in this application (including but not limited to data used for analysis, data stored, data displayed, etc.) are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0148] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A charging method, characterized in that, The method includes: Respond to the charging command and obtain the current charging current of the battery to be charged; The battery to be charged is charged according to the current charging current, and the charging characteristic parameters during the charging process are monitored. If the current charging current needs to be updated based on the charging characteristic parameters, the current charging current is updated until the charge capacity of the battery to be charged reaches the preset charge capacity. The step of obtaining the current charging current of the battery to be charged includes: Obtain the charging current when the battery to be charged was last charged to a preset charge level; If the charging current is different from the preset cutoff current, the charging current is determined as the current charging current of the battery to be charged. The charging characteristic parameters include local temperature; The method further includes: If the local temperature is not lower than a preset local temperature threshold, the battery to be charged is subjected to a cooling treatment. The cooling process for the battery to be charged includes at least one of the following: First item: Reduce the current charging current; Second item: The battery to be charged is cooled by a cooling device. The method further includes: If, after cooling the battery to be charged, the local temperature of the battery to be charged is still not lower than the preset local temperature threshold, charging shall be stopped. If the duration of the charging stop is greater than or equal to the preset charging stop duration, the battery to be charged is charged according to the current charging current, and the charging characteristic parameters during the charging process are monitored.

2. The method according to claim 1, characterized in that, The process of obtaining the current charging current of the battery to be charged includes: Obtain the remaining lifespan of the battery to be charged; The current charging current of the battery to be charged is determined based on the remaining lifespan and the preset maximum allowable charging current.

3. The method according to claim 1, characterized in that, The process of obtaining the current charging current of the battery to be charged includes: The maximum allowable charging current of the battery to be charged is determined as the current charging current of the battery to be charged.

4. The method according to claim 1, characterized in that, The charging characteristic parameters include anode potential; The method further includes: If the anode potential is not greater than a preset anode potential threshold, the current charging current is reduced.

5. The method according to any one of claims 1 to 4, characterized in that, The charging characteristic parameters include the charging voltage; The method further includes: When the charging voltage reaches the preset cutoff voltage, the battery to be charged is charged under constant voltage until the charge of the battery to be charged reaches the preset charge.

6. A charging device, characterized in that, The device includes: The charging current acquisition module is used to respond to charging commands and acquire the current charging current of the battery to be charged. A charging module is used to charge the battery to be charged according to the current charging current; The current update module is used to update the current charging current when it is determined that the current charging current needs to be updated based on the charging characteristic parameters, wake up the charging module to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process, until the charge capacity of the battery to be charged reaches the preset charge capacity. The charging current acquisition module is further configured to acquire the charging current when the battery to be charged was last charged to a preset charge level; if the charging current is different from the preset cutoff current, the charging current is determined as the current charging current of the battery to be charged; the charging characteristic parameters include local temperature. The battery update module is also used to cool down the battery to be charged when the local temperature is not lower than a preset local temperature threshold. The battery update module performs a cooling process on the battery to be recharged, including at least one of the following: First item: The battery update module reduces the current charging current; Second item: The device also includes a cooling module for cooling the battery to be charged. The cooling module is further configured to stop charging if, after cooling the battery to be charged, the local temperature of the battery to be charged is still not less than the preset local temperature threshold; and to wake up the charging module to perform the operation of charging the battery to be charged according to the current charging current and monitoring the charging characteristic parameters during the charging process if the duration of the charging stop is greater than or equal to the preset charging stop duration.

7. The apparatus according to claim 6, characterized in that, The charging current acquisition module is further configured to: acquire the remaining lifespan of the battery to be charged; and determine the current charging current of the battery to be charged based on the remaining lifespan and the preset maximum allowable charging current.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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