Control method, device, electronic device and storage medium for wireless battery charging

Abstract

The present invention provides a control method, device, electronic device and storage medium for wireless charging of a battery, and relates to the field of charging technology. The control method for wireless charging of a battery includes: detecting the real-time charging temperature of a battery to be charged; when the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is the first state, predicting the cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged within a historical time period, obtaining a target cooling efficiency, and the duration of the preset time period is a preset value; determining a target current according to the target cooling efficiency, and when the target current is less than the original charging current, controlling the wireless charging device to charge the battery to be charged using the target current. The present invention slows down the temperature rise rate of the battery to be charged, avoids excessive battery temperature during wireless charging, and improves the safety of the battery charging process.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and in particular to a control method, device, electronic device and storage medium for wireless charging of a battery. Background Art

[0002] When using a wireless charging device to charge an electric bicycle, the current flowing into the battery through the charging circuit is the charging current, and the magnitude of the charging current has a significant impact on the battery temperature and charging speed of the electric bicycle.

[0003] During the control process of wireless charging of the battery, the charging current will cause the battery to generate more heat, which may cause the battery temperature to rise. The greater the charging current, the faster the battery temperature rises. If it continues to run at a high temperature, it may cause the battery performance to decline, and even cause the battery to swell, leak or short-circuit, and in severe cases, cause a fire.

[0004] Therefore, in the related art, there is a problem that the battery temperature is too high during the wireless charging process, thereby causing a safety accident. Summary of the invention

[0005] The problem solved by the present invention is how to prevent the battery temperature from being too high during wireless charging.

[0006] In order to solve the above problems, the present invention provides a control method, device, electronic device and storage medium for wireless charging of a battery.

[0007] In a first aspect, the present invention provides a method for controlling wireless charging of a battery, comprising:

[0008] Detecting a real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device;

[0009] When the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is the first state, the cooling efficiency of the battery to be charged within a preset time period after the current moment is predicted according to the heat value generated and the heat value released by the battery to be charged within a historical time period, and a target cooling efficiency is obtained, wherein the duration of the preset time period is a preset value;

[0010] Determine a target current according to the target cooling efficiency, and control the wireless charging device to charge the battery to be charged using the target current when the target current is less than the original charging current;

[0011] Wherein, determining the target current according to the target cooling efficiency includes: determining the target current by the following formula:

[0012]

[0013] in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, and the second preset threshold is greater than the first preset threshold.

[0014] Optionally, the predicting the cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged within a historical time period to obtain a target cooling efficiency includes:

[0015] Respectively determining a heat value generated and a heat value released by the battery to be charged in a first historical time period to obtain a first generated heat and a first released heat;

[0016] Determine a cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain a first cooling efficiency, wherein the start time of the first historical time period is a first time, and the end time of the first historical time period is a second time;

[0017] Respectively determining a heat value generated and a heat value released by the battery to be charged in a second historical time period to obtain a second generated heat value and a second released heat value;

[0018] determining a cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat, to obtain a second cooling efficiency, wherein the start time of the first historical time period is the second time, and the end time of the first historical time period is the current time;

[0019] The target cooling efficiency is determined based on the first cooling efficiency and the second cooling efficiency.

[0020] Optionally, the respectively determining the heat value generated and the heat value released by the battery to be charged in the first historical time period to obtain a first generated heat and a first released heat includes:

[0021] Obtaining the charging current of the battery to be charged in the first historical time period and the duration of the first historical time period to obtain a first current and a first duration; obtaining the resistance value of the battery to be charged; and determining the first generated heat based on the first current, the first duration and the resistance value;

[0022] Obtaining the charging temperatures of the battery to be charged at the first moment and the second moment respectively, to obtain a first charging temperature and a second charging temperature; determining the amount of heat absorbed by the battery to be charged in the first historical time period according to the first charging temperature and the second charging temperature, to obtain a first absorbed heat; determining the first released heat based on the first generated heat and the first absorbed heat;

[0023] The first heat generation is expressed by the following formula:

[0024]

[0025] The first absorbed heat is expressed by the following formula:

[0026] in, For the first to generate heat, is the first current, is the resistance value of the battery to be charged, is the first duration, For the first absorbed heat, is the mass of the battery to be charged, is the specific heat capacity of the battery to be charged, is a temperature variation, and the temperature variation is a difference between the second charging temperature and the first charging temperature.

[0027] Optionally, the respectively determining the heat value generated and the heat value released by the battery to be charged in the second historical time period to obtain a second generated heat and a second released heat includes:

[0028] Obtaining the charging current of the battery to be charged in the second historical time period and the duration of the second historical time period to obtain a second current and a second duration; obtaining the resistance value of the battery to be charged; and determining the second generated heat based on the second current, the second duration and the resistance value;

[0029] Obtain the charging temperatures of the battery to be charged at the second moment and the current moment respectively, and obtain the second charging temperature and the real-time charging temperature; determine the heat absorbed by the battery to be charged in the second historical time period according to the second charging temperature and the real-time charging temperature, and obtain the second absorbed heat; determine the second released heat based on the second generated heat and the second absorbed heat.

[0030] Optionally, determining the cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain a first cooling efficiency includes: determining a ratio of the first released heat to the first generated heat as the first cooling efficiency;

[0031] Optionally, determining the cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat to obtain the second cooling efficiency includes: determining the ratio of the second released heat to the second generated heat as the second cooling efficiency.

[0032] Optionally, determining the target cooling efficiency based on the first cooling efficiency and the second cooling efficiency includes:

[0033] determining a change rate of a cooling efficiency of the battery to be charged according to the first cooling efficiency and the second cooling efficiency;

[0034] The target cooling efficiency is determined according to the change rate and the second cooling efficiency, wherein a ratio of the target cooling efficiency to the second cooling efficiency is equal to a ratio of the second cooling efficiency to the first cooling efficiency.

[0035] Optionally, before detecting the real-time charging temperature of the battery to be charged, the battery wireless charging control method further includes:

[0036] When it is detected that the wireless charging device starts to charge the battery to be charged, obtaining the battery capacity and the maximum charging rate of the battery to be charged;

[0037] Determine the original charging current according to the battery capacity and the maximum charging rate;

[0038] The wireless charging device is controlled to charge the battery to be charged using the original charging current.

[0039] In a second aspect, the present invention provides a control device for wireless charging of a battery, comprising:

[0040] A detection module, used to detect the real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device;

[0041] a prediction module, configured to predict, when the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is a first state, a cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged within a historical time period, and obtain a target cooling efficiency, wherein the duration of the preset time period is a preset value;

[0042] a determination module, configured to determine a target current according to the target cooling efficiency, and, when the target current is less than the original charging current, control the wireless charging device to charge the battery to be charged using the target current;

[0043] The determination module is used to determine the target current by the following formula:

[0044]

[0045] in, For the first to generate heat, is the first current, is the resistance value of the battery to be charged, is the first duration, For the first absorbed heat, is the mass of the battery to be charged, is the specific heat capacity of the battery to be charged, is a temperature variation, and the temperature variation is a difference between the second charging temperature and the first charging temperature.

[0046] In a third aspect, the present invention provides an electronic device, including a memory and a processor;

[0047] The memory is used to store computer programs;

[0048] The processor is used to implement the control method for wireless charging of a battery as described in the first aspect when executing the computer program.

[0049] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the control method for wireless charging of a battery as described in the first aspect is implemented.

[0050] The control method, device, electronic device and storage medium of wireless charging of a battery of the present invention have the following beneficial effects: the real-time temperature of the rechargeable battery is monitored during the charging process; when the temperature of the battery to be charged rises to a first preset threshold value and the wireless charging device is in a first state, a target current is determined according to a target cooling efficiency of the battery to be charged, and the wireless charging device is controlled to charge the battery to be charged using a target current that is smaller than the original charging current. Firstly, the charging current of the charging device is reduced, and the temperature rise rate of the battery to be charged is slowed down. Secondly, the setting of the target current is combined with the target cooling efficiency, so that the temperature change within a preset time period when charging with the target current is predictable and will not be higher than a second preset threshold value within the preset time period, thereby avoiding excessive battery temperature during wireless charging and improving the safety of the battery charging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A flowchart of a method for controlling wireless charging of a battery according to an embodiment of the present invention;

[0052] Figure 2 A schematic diagram of a temperature variation curve of a battery to be charged according to an embodiment of the present invention;

[0053] Figure 3 This is a schematic structural diagram of a control device for wireless charging of a battery according to an embodiment of the present invention;

[0054] Figure 4 The figure is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0056] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0057] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0058] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0059] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0060] This embodiment provides a control method, device, electronic device and storage medium for wireless charging of a battery.

[0061] Figure 1 A flowchart of a method for controlling wireless charging of a battery provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, an embodiment of the present invention provides a method for controlling wireless charging of a battery, comprising:

[0062] S100, detecting a real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device.

[0063] Specifically, the wireless charging device is a charger that can provide a wireless charging function, the battery to be charged is a battery that needs to be charged using the wireless charging device, and the battery to be charged is a battery in an electric bicycle. The wireless charging device is configured to charge the battery to be charged in a first state when the battery power is low at the beginning of charging the battery to be charged. After a period of wireless charging in the first state, when the battery power reaches a preset threshold (for example, 80%), the charging state of the wireless charging device switches from the first state to a second state, and the battery to be charged is charged in the second state until the charging is completed; when the battery power starts to be charged, if the battery power is greater than or equal to the preset threshold, the wireless charging device directly charges the battery to be charged in the second state, and the second state is a constant voltage charging state. In this state, the charging voltage is maintained at a first relatively stable level, and the output voltage of the wireless charging device is controlled, that is, the output voltage is maintained constant. The charging current of the wireless charging device will gradually decrease with the charging time, and will not cause the battery temperature to be too high. The probability of a safety accident caused by excessive temperature is low. When the wireless charging device starts to charge the battery to be charged, if the power of the battery to be charged is low (lower than a preset threshold), the charging device will charge the battery to be charged in the first state. At this time, the charging current is the original charging current. The wireless charging device uses the original charging current to charge the battery to be charged, wherein the original charging current is a current value that can be pre-set or determined based on the battery properties of the battery to be charged.

[0064] The first state is the constant current charging state, in which the charging current is maintained at a relatively stable level. The original charging current is used to perform constant current charging on the battery to be charged. While the battery power increases rapidly, the temperature of the battery to be charged also rises rapidly due to the large charging current.

[0065] In order to avoid safety problems caused by a continuous and rapid increase in the temperature of the battery to be charged, the temperature of the battery to be charged is monitored in real time during the constant current charging process, that is, when the wireless charger is charging the battery to be charged, the real-time charging temperature of the battery to be charged is detected.

[0066] S200, when the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is a first state, predict the cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged in a historical time period, and obtain a target cooling efficiency, wherein the duration of the preset time period is a preset value.

[0067] Specifically, when the real-time charging temperature rises to the first preset threshold, it is necessary to determine whether the charging state of the wireless charging device is the first state or the second state, that is, whether the wireless charging device adopts constant current charging or constant voltage charging. At this time, if the wireless charging device adopts the constant current charging state, the cooling efficiency within a period of time (preset time period) after the current moment is predicted to obtain the target cooling efficiency.

[0068] The target cooling efficiency is the ability of the battery to effectively dissipate the heat generated at the current moment, usually expressed as a percentage. For example, a cooling efficiency of 90% means that 90% of the heat generated by the charging current can be effectively dissipated, and only 10% of the heat is absorbed by the battery to be charged, which causes the temperature to increase.

[0069] The target cooling efficiency can be used to predict the cooling efficiency in the next time period (preset time period) based on the heat dissipation of the battery to be charged in the historical time period before the current moment (ie, the heat value generated and the heat value released in the historical time period).

[0070] After the target cooling efficiency is determined, if the charging current in a preset time period is known, the temperature change of the battery to be charged in the preset time period can be effectively predicted.

[0071] S300, determining a target current according to the target cooling efficiency, and controlling the wireless charging device to charge the battery to be charged using the target current when the target current is less than the original charging current;

[0072] Wherein, determining the target current according to the target cooling efficiency includes: determining the target current by the following formula:

[0073]

[0074] in, For the first to generate heat, is the first current, is the resistance value of the battery to be charged, is the first duration, For the first absorbed heat, is the mass of the battery to be charged, is the specific heat capacity of the battery to be charged, is a temperature variation, and the temperature variation is a difference between the second charging temperature and the first charging temperature.

[0075] Specifically, the target current can be determined according to the target cooling efficiency through the above calculation formula. When the determined target current is less than the original charging current, the charging current of the wireless charging device is adjusted from the original charging current to the target current. The wireless charging device uses the target current to charge the battery to be charged, and most of the heat generated by the charging current during charging can be effectively dissipated. The charging current is adjusted from the original charging current to a target current that is smaller than the original charging current, that is, the charging current of the wireless charging device with a rechargeable battery is reduced to slow down the rise in battery temperature.

[0076] In this embodiment, the real-time temperature of the rechargeable battery is monitored during the charging process. When the temperature of the battery to be charged rises to a first preset threshold value and the wireless charging device is in a first state, the target current is determined according to the target cooling efficiency of the battery to be charged, and the wireless charging device is controlled to charge the battery to be charged with a target current that is smaller than the original charging current. Firstly, the charging current of the charging device is reduced, and the temperature rise rate of the battery to be charged is slowed down. Secondly, the setting of the target current is combined with the target cooling efficiency, so that the temperature change within a preset time period when charging with the target current is predictable and will not be higher than the second preset threshold value within the preset time period, thereby avoiding excessive battery temperature during wireless charging and improving the safety of the battery charging process.

[0077] Optionally, predicting the cooling efficiency of the battery to be charged in a preset time period after a current moment according to the heat value generated and the heat value released by the battery to be charged in a historical time period to obtain a target cooling efficiency includes: respectively determining the heat value generated and the heat value released by the battery to be charged in a first historical time period to obtain a first generated heat and a first released heat; determining the cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain the first cooling efficiency, wherein the start moment of the first historical time period is the first moment, and the end moment of the first historical time period is the second moment;

[0078] Respectively determining the heat value generated and the heat value released by the battery to be charged in the second historical time period to obtain a second generated heat and a second released heat; determining the cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat to obtain a second cooling efficiency, wherein the start time of the first historical time period is the second time, and the end time of the first historical time period is the current time;

[0079] The target cooling efficiency is determined based on the first cooling efficiency and the second cooling efficiency.

[0080] Specifically, the target cooling efficiency is determined based on the heat dissipation conditions of a period of time before the current moment, i.e., a historical time period. The historical time period is divided into a first historical time period and a second historical time period. The cooling efficiency corresponding to the first historical time period and the second historical time period is determined respectively, i.e., the first cooling efficiency and the second cooling efficiency, the cooling efficiency corresponding to the battery to be charged in the preset time period is predicted.

[0081] In this embodiment, the cooling efficiency corresponding to the battery to be charged at the current moment is predicted by the cooling efficiency in different time periods in the historical time, so as to improve the accuracy of the target cooling efficiency.

[0082] The first historical time period and the second historical time period may be selected according to a fixed duration (preset value), that is, the first historical time period, the second historical time period and the preset time period are equal in duration.

[0083] The selection of the first historical time period and the second historical time period can also be selected according to the fixed rising temperature, that is, the temperature rise of the battery to be charged in the first historical time period is equal to the temperature rise of the battery to be charged in the second historical time period, the first historical time period corresponds to the time period between the first moment and the second moment, the second historical time period corresponds to the time period between the second moment and the current moment, the temperature of the battery to be charged at the first moment is the first temperature value (corresponding to the first charging temperature), the temperature of the battery to be charged at the second moment is the second temperature value (corresponding to the second charging temperature), the temperature of the battery to be charged at the current moment is the first preset threshold, the difference between the second temperature value and the first temperature value is equal to the difference between the first preset threshold and the second temperature value, which is equal to the fixed rising temperature, and the fixed rising temperature can be the difference between the preset second preset threshold and the first preset threshold. For example, the temperature change curve of the battery to be charged, such as Figure 2As shown, the battery to be charged rises to the first preset threshold value T0 at the current moment t0. Before the current moment, the real-time temperature at the first moment t1 is the first temperature value T1, and the real-time temperature at the second moment t2 is the second temperature value T2. The first historical time period corresponds to the first moment t1 to the second moment t2. During this time period, the temperature of the battery to be charged rises from the first temperature value T1 to the second temperature T2. The second historical time period corresponds to the second moment t2 to the current moment t0. During this time period, the temperature of the battery to be charged rises from the second temperature value T2 to the first preset threshold value T0. The temperature difference rising in the first historical time period is equal to the temperature difference rising in the second historical time period, that is, the difference between the first temperature value and the second temperature value is equal to the difference between the first preset threshold value and the second temperature value. The second preset threshold value is also a pre-set temperature value, which is the maximum temperature of the battery to be charged in a safe state. When the real-time temperature of the battery to be charged rises to the second preset threshold value, the charging device stops charging the battery to be charged, that is, the charging current of the wireless charging of the battery is controlled to zero.

[0084] The cooling efficiency corresponding to each time period can be calculated based on the heat value generated by the charging current and the heat value released by the battery to be charged in the time period. Specifically, the cooling efficiency of the first historical time period is determined based on the heat value generated (first generated heat) and the heat value released (first released heat) in the first historical time period, and the cooling efficiency of the second historical time period is determined based on the heat value generated (second generated heat) and the heat value released (second released heat) in the second historical time period.

[0085] Optionally, the respectively determining the heat value generated and the heat value released by the battery to be charged in the first historical time period to obtain a first generated heat and a first released heat includes:

[0086] Obtaining the charging current of the battery to be charged in the first historical time period and the duration of the first historical time period to obtain a first current and a first duration; obtaining the resistance value of the battery to be charged; and determining the first generated heat based on the first current, the first duration and the resistance value;

[0087] Obtain the charging temperatures of the battery to be charged at the first moment and the second moment respectively, to obtain a first charging temperature and a second charging temperature; determine the amount of heat absorbed by the battery to be charged in the first historical time period according to the first charging temperature and the second charging temperature, to obtain a first absorbed heat; determine the first released heat based on the first generated heat and the first absorbed heat.

[0088] Specifically, in the first historical time period, a total of three heat values ​​are involved: the heat value released by the battery to be charged, the heat value absorbed by the battery to be charged, and the heat value generated by the charging current. Part of the heat generated by the charging current during the charging process is absorbed by the battery to be charged, causing the temperature of the battery to be charged to rise, and the other part can be dissipated and will not cause the temperature of the battery to be charged to rise. Therefore, the sum of the heat value released by the battery to be charged and the heat value absorbed by the battery to be charged is equal to the heat value generated by the charging current.

[0089] The heat generated by the charging current in the first historical time period is determined according to the magnitude of the charging current (first current) in the time period, the resistance value of the battery to be charged, and the charging duration, i.e., the duration in the first historical time period (first duration). Specifically, the heat generated by the charging current in the first historical time period is expressed by the following formula:

[0090]

[0091] in, To generate heat first, is the first current, is the resistance value of the battery to be charged, For the first duration.

[0092] The heat value absorbed by the battery to be charged in the first historical time period can be determined by the temperature change in the first historical time period, that is, the heat absorbed by the battery to be charged in the first historical time period is determined according to the first charging temperature and the second charging temperature to obtain the first absorbed heat. Specifically, the heat value absorbed by the battery to be charged in the first historical time period can be expressed by the following formula:

[0093]

[0094] in, For the first absorption of heat, is the mass of the battery to be charged, is the specific heat capacity of the battery to be charged, is the temperature change.

[0095] The temperature change is the difference between the initial temperature and the final temperature in the first historical time period, that is, the difference between the second charging temperature and the first charging temperature.

[0096] The heat generated by the first current minus the heat added by the battery to be charged is obtained to obtain the heat dissipated by the battery to be charged in the first historical time period, namely, the first released heat.

[0097] Optionally, the respectively determining the heat value generated and the heat value released by the battery to be charged in the second historical time period to obtain a second generated heat and a second released heat includes:

[0098] Obtaining the charging current of the battery to be charged in the second historical time period and the duration of the second historical time period to obtain a second current and a second duration; obtaining the resistance value of the battery to be charged; and determining the second generated heat based on the second current, the second duration and the resistance value;

[0099] Obtain the charging temperatures of the battery to be charged at the second moment and the current moment respectively, and obtain the second charging temperature and the real-time charging temperature; determine the heat absorbed by the battery to be charged in the second historical time period according to the second charging temperature and the real-time charging temperature, and obtain the second absorbed heat; determine the second released heat based on the second generated heat and the second absorbed heat.

[0100] Specifically, the corresponding calorie values ​​generated and released in the second historical time period are similar to the corresponding calorie values ​​generated and released in the first historical time period, and are not repeated here.

[0101] Optionally, determining the cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain a first cooling efficiency includes: determining a ratio of the first released heat to the first generated heat as the first cooling efficiency;

[0102] Optionally, determining the cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat to obtain the second cooling efficiency includes: determining the ratio of the second released heat to the second generated heat as the second cooling efficiency.

[0103] Optionally, determining the target cooling efficiency based on the first cooling efficiency and the second cooling efficiency includes: determining the rate of change of the cooling efficiency of the battery to be charged according to the first cooling efficiency and the second cooling efficiency; determining the target cooling efficiency according to the rate of change and the second cooling efficiency, wherein the ratio of the target cooling efficiency to the second cooling efficiency is equal to the ratio of the second cooling efficiency to the first cooling efficiency.

[0104] Specifically, the change rate of the cooling efficiency is considered to remain unchanged, and the target cooling efficiency can be calculated according to the cooling efficiencies of the first historical time period and the second historical time period (the first cooling efficiency and the second cooling efficiency), which can be specifically expressed by the following formula:

[0105]

[0106] Specifically, the ratio of the second cooling efficiency to the first cooling efficiency may be determined to obtain a first ratio; and the product of the first ratio and the first cooling efficiency may be determined as the target cooling efficiency.

[0107] Optionally, before detecting the real-time charging temperature of the battery to be charged, the battery wireless charging control method also includes: when it is detected that the wireless charging device starts to charge the battery to be charged, obtaining the battery capacity and the maximum charging rate of the battery to be charged; determining the original charging current according to the battery capacity and the maximum charging rate; and controlling the wireless charging device to charge the battery to be charged using the original charging current.

[0108] Specifically, before detecting the real-time charging temperature of the battery to be charged, when starting constant-current charging for the battery to be charged, it is necessary to determine the original charging current. The original charging current is determined according to the battery properties (maximum charging rate and battery capacity) of the battery to be charged. Specifically, the product of the maximum charging rate and the battery capacity can be the original charging current. For example, if the maximum charging rate of the battery is 2C and the battery capacity is 2000mAh, then the first charging current is 4000mA, i.e., 4A. The charging current (original charging current or first current) determined by the maximum charging rate is the maximum safe charging current that the battery can withstand within a safe range. Using the original charging current to charge the battery to be charged can increase the battery charge to a higher level in a shorter time, i.e., achieve fast charging.

[0109] Optionally, determining the target current according to the target cooling efficiency includes: predicting the amount of heat absorbed by the battery to be charged when the real-time temperature of the battery to be charged rises from the first preset threshold to the second preset threshold, and obtaining a third absorbed heat, wherein the second preset threshold is greater than the first preset threshold; predicting, according to the first absorbed heat and the target cooling efficiency, the amount of heat generated by the charging current of the charging device in the process of the real-time temperature of the battery to be charged rising from the first preset threshold to the second preset threshold, and obtaining a third generated heat; determining the target current according to the third generated heat and the duration of the preset time period.

[0110] At the current moment, the temperature of the battery to be charged is the first preset threshold value. Assuming that the temperature of the battery to be charged continues to rise, after a preset time period, the temperature of the battery to be charged just rises to the second preset threshold value, wherein the heat absorbed by the battery to be charged when the first preset threshold value rises to the second preset threshold value is the third absorbed heat, and according to the target cooling efficiency and the third absorbed heat, the heat generated by the charging current in the time period corresponding to this temperature rise is calculated, which is the third generated heat.

[0111] Specifically, the third absorbed heat can be expressed by the following formula:

[0112]

[0113] in, For the third to absorb heat, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the first preset threshold, is the second preset threshold.

[0114] The third heat generation can be expressed by the following formula:

[0115]

[0116] in, Generates heat for the third For the third to absorb heat, The target cooling efficiency.

[0117] The charging current during this period, that is, the target current, can be determined based on the heat generated during the time period corresponding to the rise from the first preset threshold to the second preset threshold (the third generated heat) and the duration corresponding to the time period (corresponding to the above preset value).

[0118] Specifically, the target current can be calculated by the following formula:

[0119]

[0120] in, is the target current, is the resistance value of the battery to be charged, is the preset value, Generates heat for the third.

[0121] In summary, the target current is determined by the following formula:

[0122]

[0123] in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, and the second preset threshold is greater than the first preset threshold.

[0124] In addition, after calculating the target current, it is determined whether the calculated target current is less than the first charging current. If the second charging current is less than the first charging current, the charging current of the wireless charging device is adjusted from the original charging current to the target current. If the target current is greater than or equal to the original charging current, the target time is increased and the target current is recalculated until the calculated target current is less than the original charging current.

[0125] Optionally, after controlling the wireless charging device to use the target current to charge the battery to be charged, it includes: detecting the battery voltage of the battery to be charged in real time, and when the battery voltage reaches a target voltage threshold, controlling the wireless charging device to maintain a fixed charging voltage to charge the battery to be charged.

[0126] Specifically, when the battery voltage reaches or exceeds the target voltage threshold, the wireless charging device switches from the first state to the second state, that is, from the constant current charging mode to the constant voltage charging mode, that is, the charging device is controlled to maintain a fixed charging voltage to charge the battery to be charged.

[0127] like Figure 3 As shown, a battery wireless charging control device 300 provided in an embodiment of the present invention includes:

[0128] The detection module 310 is used to detect the real-time charging temperature of the battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device;

[0129] The prediction module 320 is used to predict the cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged within a historical time period when the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is the first state, and obtain a target cooling efficiency, wherein the duration of the preset time period is a preset value;

[0130] A determination module 330 is used to determine a target current according to the target cooling efficiency, and when the target current is less than the original charging current, control the wireless charging device to charge the battery to be charged using the target current;

[0131] The determination module is used to determine the target current by the following formula:

[0132]

[0133] in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, and the second preset threshold is greater than the first preset threshold.

[0134] The battery wireless charging control device of this embodiment is used to implement the battery wireless charging control method as described above. Its advantages over the prior art are the same as the advantages of the battery wireless charging control method as described above over the prior art, and will not be repeated here.

[0135] Optionally, the control device for wireless charging of the battery is also used to predict the cooling efficiency of the battery to be charged within a preset time period after the current moment in the following manner: respectively determine the heat value generated and the heat value released by the battery to be charged in a first historical time period to obtain a first generated heat and a first released heat; determine the cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain a first cooling efficiency, wherein the start time of the first historical time period is the first moment, and the end time of the first historical time period is the second moment; respectively determine the heat value generated and the heat value released by the battery to be charged in the second historical time period to obtain a second generated heat and a second released heat; determine the cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat to obtain a second cooling efficiency, wherein the start time of the first historical time period is the second moment, and the end time of the first historical time period is the current moment; determine the target cooling efficiency based on the first cooling efficiency and the second cooling efficiency.

[0136] Optionally, the battery wireless charging control device is further used to respectively determine the heat value generated and the heat value released by the battery to be charged in the first historical time period in the following manner to obtain a first generated heat and a first released heat:

[0137] Obtaining the charging current of the battery to be charged in the first historical time period and the duration of the first historical time period to obtain a first current and a first duration; obtaining the resistance value of the battery to be charged; and determining the first generated heat based on the first current, the first duration and the resistance value;

[0138] Obtain the charging temperatures of the battery to be charged at the first moment and the second moment respectively, to obtain a first charging temperature and a second charging temperature; determine the amount of heat absorbed by the battery to be charged in the first historical time period according to the first charging temperature and the second charging temperature, to obtain a first absorbed heat; determine the first released heat based on the first generated heat and the first absorbed heat.

[0139] Optionally, the battery wireless charging control device is further used to respectively determine the heat value generated and the heat value released by the battery to be charged in the second historical time period in the following manner to obtain the second generated heat and the second released heat:

[0140] Obtaining the charging current of the battery to be charged in the second historical time period and the duration of the second historical time period to obtain a second current and a second duration; obtaining the resistance value of the battery to be charged; and determining the second generated heat based on the second current, the second duration and the resistance value;

[0141] Obtain the charging temperatures of the battery to be charged at the second moment and the current moment respectively, and obtain the second charging temperature and the real-time charging temperature; determine the heat absorbed by the battery to be charged in the second historical time period according to the second charging temperature and the real-time charging temperature, and obtain the second absorbed heat; determine the second released heat based on the second generated heat and the second absorbed heat.

[0142] Optionally, the control device for wireless charging of the battery is also used to determine the cooling efficiency of the battery to be charged during the first historical time period according to the first heat generation and the first heat release in the following manner: the ratio of the first heat release to the first heat generation is determined as the first cooling efficiency.

[0143] Optionally, the control device for wireless charging of the battery is also used to determine the cooling efficiency of the battery to be charged in the second historical time period according to the second heat generation and the second heat release, to obtain the second cooling efficiency: the ratio of the second heat release to the second heat generation is determined as the second cooling efficiency.

[0144] Optionally, the battery wireless charging control device is further used to determine the target cooling efficiency based on the first cooling efficiency and the second cooling efficiency in the following manner:

[0145] determining a change rate of a cooling efficiency of the battery to be charged according to the first cooling efficiency and the second cooling efficiency;

[0146] The target cooling efficiency is determined according to the change rate and the second cooling efficiency, wherein a ratio of the target cooling efficiency to the second cooling efficiency is equal to a ratio of the second cooling efficiency to the first cooling efficiency.

[0147] Optionally, the battery wireless charging control device is further used for obtaining the battery capacity and the maximum charging rate of the battery to be charged before detecting the real-time charging temperature of the battery to be charged, when detecting that the wireless charging device starts to charge the battery to be charged;

[0148] Determine the original charging current according to the battery capacity and the maximum charging rate;

[0149] The wireless charging device is controlled to charge the battery to be charged using the original charging current.

[0150] like Figure 4 As shown, an electronic device 400 provided by an embodiment of the present invention includes a memory 410 and a processor 420; the memory 410 is used to store a computer program; the processor 420 is used to implement the control method of wireless battery charging as described above when executing the computer program.

[0151] In other words, an electronic device 400 includes a memory 410 and a processor 420 coupled to the memory 410; the memory 410 is configured to store a computer program; and the processor 420 is configured to perform the following operations when executing the computer program:

[0152] Detecting a real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device;

[0153] When the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is the first state, the cooling efficiency of the battery to be charged within a preset time period after the current moment is predicted according to the heat value generated and the heat value released by the battery to be charged within a historical time period, and a target cooling efficiency is obtained, wherein the duration of the preset time period is a preset value;

[0154] Determine a target current according to the target cooling efficiency, and control the wireless charging device to charge the battery to be charged using the target current when the target current is less than the original charging current;

[0155] Wherein, determining the target current according to the target cooling efficiency includes: determining the target current by the following formula:

[0156]

[0157] in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, and the second preset threshold is greater than the first preset threshold.

[0158] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned control method for wireless charging of a battery is implemented.

[0159] In other words, a non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor performs the following operations:

[0160] Detecting a real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device;

[0161] When the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is the first state, the cooling efficiency of the battery to be charged within a preset time period after the current moment is predicted according to the heat value generated and the heat value released by the battery to be charged within a historical time period, and a target cooling efficiency is obtained, wherein the duration of the preset time period is a preset value;

[0162] Determine a target current according to the target cooling efficiency, and control the wireless charging device to charge the battery to be charged using the target current when the target current is less than the original charging current;

[0163] Wherein, determining the target current according to the target cooling efficiency includes: determining the target current by the following formula:

[0164]

[0165] in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, and the second preset threshold is greater than the first preset threshold.

[0166] An electronic device 400 that can be used as a server or client of the present invention will now be described, which is an example of a hardware device that can be applied to various aspects of the present invention. The electronic device 400 is intended to represent various forms of digital electronic computer equipment, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device 400 can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples, and are not intended to limit the implementation of the present invention described and / or required herein.

[0167] The electronic device 400 includes a computing unit, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) or a computer program loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for the operation of the device can also be stored. The computing unit, ROM, and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0168] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. In the present application, the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention. In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0169] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A control method for wireless charging of a battery, characterized in that: include: Detecting a real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device; When the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is the first state, the cooling efficiency of the battery to be charged within a preset time period after the current moment is predicted according to the heat value generated and the heat value released by the battery to be charged within a historical time period, and a target cooling efficiency is obtained, wherein the duration of the preset time period is a preset value; Determine a target current according to the target cooling efficiency, and control the wireless charging device to charge the battery to be charged using the target current when the target current is less than the original charging current; Wherein, determining the target current according to the target cooling efficiency includes: determining the target current by the following formula: in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, the second preset threshold represents the highest safe temperature value of the battery to be charged, and the second preset threshold is greater than the first preset threshold.

2. The control method for wireless charging of a battery according to claim 1, characterized in that: The step of predicting the cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged within a historical time period to obtain a target cooling efficiency includes: Respectively determining a heat value generated and a heat value released by the battery to be charged in a first historical time period to obtain a first generated heat and a first released heat; Determine a cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain a first cooling efficiency, wherein the start time of the first historical time period is a first time, and the end time of the first historical time period is a second time; Respectively determining a heat value generated and a heat value released by the battery to be charged in a second historical time period to obtain a second generated heat value and a second released heat value; determining a cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat, to obtain a second cooling efficiency, wherein the start time of the second historical time period is the second moment, and the end time of the second historical time period is the current moment; The target cooling efficiency is determined based on the first cooling efficiency and the second cooling efficiency.

3. The control method for wireless charging of a battery according to claim 2, characterized in that: The step of respectively determining the heat value generated and the heat value released by the battery to be charged in the first historical time period to obtain a first generated heat and a first released heat includes: Obtaining the charging current of the battery to be charged in the first historical time period and the duration of the first historical time period to obtain a first current and a first duration; obtaining the resistance value of the battery to be charged; determining the first generated heat based on the first current, the first duration and the resistance value; obtaining the charging temperatures of the battery to be charged at the first moment and the second moment respectively to obtain a first charging temperature and a second charging temperature; determining the heat absorbed by the battery to be charged in the first historical time period according to the first charging temperature and the second charging temperature to obtain a first absorbed heat; determining the first released heat based on the first generated heat and the first absorbed heat; The first heat generation is expressed by the following formula: The first absorbed heat is expressed by the following formula: in, For the first to generate heat, is the first current, is the resistance value of the battery to be charged, is the first duration, For the first absorbed heat, is the mass of the battery to be charged, is the specific heat capacity of the battery to be charged, is a temperature variation, and the temperature variation is a difference between the second charging temperature and the first charging temperature.

4. The method for controlling wireless charging of a battery according to claim 3, characterized in that: The step of respectively determining the heat value generated and the heat value released by the battery to be charged in the second historical time period to obtain a second generated heat and a second released heat comprises: Obtaining the charging current of the battery to be charged in the second historical time period and the duration of the second historical time period to obtain a second current and a second duration; obtaining the resistance value of the battery to be charged; and determining the second generated heat based on the second current, the second duration and the resistance value; Obtain the charging temperatures of the battery to be charged at the second moment and the current moment respectively, and obtain the second charging temperature and the real-time charging temperature; determine the heat absorbed by the battery to be charged in the second historical time period according to the second charging temperature and the real-time charging temperature, and obtain the second absorbed heat; determine the second released heat based on the second generated heat and the second absorbed heat.

5. The control method for wireless charging of a battery according to claim 3 or 4, characterized in that: The step of determining the cooling efficiency of the battery to be charged in the first historical time period according to the first generated heat and the first released heat to obtain a first cooling efficiency includes: determining a ratio of the first released heat to the first generated heat as the first cooling efficiency; Determining the cooling efficiency of the battery to be charged in the second historical time period according to the second generated heat and the second released heat to obtain the second cooling efficiency includes: determining the ratio of the second released heat to the second generated heat as the second cooling efficiency.

6. The method for controlling wireless charging of a battery according to claim 3, characterized in that: The determining the target cooling efficiency based on the first cooling efficiency and the second cooling efficiency includes: determining a change rate of a cooling efficiency of the battery to be charged according to the first cooling efficiency and the second cooling efficiency; The target cooling efficiency is determined according to the change rate and the second cooling efficiency, wherein a ratio of the target cooling efficiency to the second cooling efficiency is equal to a ratio of the second cooling efficiency to the first cooling efficiency.

7. The method for controlling wireless charging of a battery according to claim 1, characterized in that: Before detecting the real-time charging temperature of the battery to be charged, the battery wireless charging control method further includes: When it is detected that the wireless charging device starts to charge the battery to be charged, obtaining the battery capacity and the maximum charging rate of the battery to be charged; Determine the original charging current according to the battery capacity and the maximum charging rate; The wireless charging device is controlled to charge the battery to be charged using the original charging current.

8. A control device for wireless charging of a battery, characterized in that: include: A detection module, used to detect the real-time charging temperature of a battery to be charged, wherein the battery to be charged is a battery being charged by a wireless charging device; a prediction module, configured to predict, when the real-time charging temperature rises to a first preset threshold value and the charging state of the wireless charging device is a first state, a cooling efficiency of the battery to be charged within a preset time period after the current moment according to the heat value generated and the heat value released by the battery to be charged within a historical time period, and obtain a target cooling efficiency, wherein the duration of the preset time period is a preset value; a determination module, configured to determine a target current according to the target cooling efficiency, and, when the target current is less than the original charging current, control the wireless charging device to charge the battery to be charged using the target current; Wherein, the determination module is used to determine the target current by the following formula: in, is the target current, is the resistance value of the battery to be charged, is the preset value, is the specific heat capacity of the rechargeable battery, is the mass of the battery to be charged, is the target cooling efficiency, is the first preset threshold, is a second preset threshold, the second preset threshold represents the highest safe temperature value of the battery to be charged, and the second preset threshold is greater than the first preset threshold.

9. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the battery wireless charging control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the control method for wireless charging of a battery as claimed in any one of claims 1 to 7 is implemented.

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