Battery charging method, device, apparatus and readable storage medium

Abstract

The application discloses a battery charging method, device and equipment and a readable storage medium. The battery charging method comprises the following steps: acquiring the current actual capacity of a battery; and determining the charging current of the battery in a constant current charging stage according to the current actual capacity of the battery. The method can obtain the current actual capacity of the battery through continuous measurement of the battery capacity, continuously adjust the charging current of the constant current charging stage according to the actual capacity, slow down the aging and attenuation speed of the battery to the greatest extent, and improve the service life of the battery.

Description

Technical Field

[0001] This disclosure relates to battery charging technology, and more specifically, to a battery charging method, apparatus, device, and readable storage medium. Background Technology

[0002] With the continuous development of fast charging technology, battery charging speeds are getting faster and faster. However, as the charging speed increases, the impact on battery lifespan also increases, and the aging rate of batteries accelerates accordingly.

[0003] Currently, research on optimizing battery life mainly focuses on optimizing the battery system, such as improving the structural stability of positive and negative electrode materials through technologies like coating or doping. However, the inventors discovered during their research that improving battery life can not only rely on improving the battery system itself, but also on improving the actual usage of the battery, such as the charging process.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of the above, this disclosure provides a battery charging method, apparatus, device, and readable storage medium.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to one aspect of this disclosure, a battery charging method is provided, comprising: obtaining the current actual capacity of the battery; and determining the charging current of the battery during a constant current charging phase based on the current actual capacity of the battery.

[0008] According to one embodiment of this disclosure, the method further includes: controlling the battery to charge using the determined charging current during the constant current charging phase.

[0009] According to one embodiment of this disclosure, determining the charging current of the battery during the constant current charging phase based on the battery's current actual capacity includes: when the battery's current actual capacity is less than the actual capacity measured after the previous charging or before the previous charging, calculating the charging current based on the battery's current actual capacity and using the same rate as that used during the constant current charging phase in the previous charging process.

[0010] According to one embodiment of this disclosure, determining the charging current of the battery during the constant current charging phase based on the current actual capacity of the battery further includes: when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging, the charging current is determined to be the charging current of the battery during the constant current charging phase during the previous charging process.

[0011] According to one embodiment of this disclosure, determining the charging current of the battery during the constant current charging stage based on the current actual capacity of the battery includes: inputting the current actual capacity of the battery into a charging current determination model, and outputting the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.

[0012] According to one embodiment of this disclosure, the method further includes: determining the cutoff current of the battery during the constant voltage charging phase based on the current actual capacity of the battery.

[0013] According to one embodiment of this disclosure, determining the cutoff current of the battery during the constant voltage charging stage based on the current actual capacity of the battery includes: inputting the current actual capacity of the battery into a cutoff current determination model, and outputting the cutoff current according to the cutoff current determination model; wherein, the cutoff current determination model is a model established based on big data learning.

[0014] According to one embodiment of this disclosure, the method further includes: controlling the constant voltage charging process to stop when the charging current of the battery drops to the cutoff current during the constant voltage charging phase.

[0015] According to one embodiment of this disclosure, determining the charging current of the battery during the constant current charging stage based on the current actual capacity of the battery includes: determining the charging current of the battery during different constant current charging stages based on the current actual capacity of the battery.

[0016] According to one embodiment of this disclosure, the cutoff current of the battery during the constant voltage charging stage is determined based on the current actual capacity of the battery: the cutoff current of the battery during different constant voltage charging stages is determined based on the current actual capacity of the battery.

[0017] According to another aspect of this disclosure, a battery charging device is provided, comprising: a battery capacity acquisition module for acquiring the current actual capacity of the battery; and a charging current determination module for determining the charging current of the battery during a constant current charging phase based on the current actual capacity of the battery.

[0018] According to another aspect of this disclosure, a device to be charged is provided, comprising: a battery and a control module; wherein the control module is configured to acquire the current actual capacity of the battery, and determine the charging current of the battery during a constant current charging phase based on the current actual capacity of the battery.

[0019] According to one embodiment of this disclosure, the control module is further configured to control the battery to be charged by the determined charging current during the constant current charging phase.

[0020] According to one embodiment of this disclosure, the control module is further configured to provide the determined charging current to the wireless charging device or the power supply device.

[0021] According to one embodiment of this disclosure, the control module is used to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging or before the previous charging.

[0022] According to one embodiment of this disclosure, the control module is further configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

[0023] According to one embodiment of this disclosure, the control module is used to input the current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein, the charging current determination model is a model established based on big data learning.

[0024] According to one embodiment of this disclosure, the control module is further configured to determine the cutoff current of the battery during the constant voltage charging phase based on the current actual capacity of the battery.

[0025] According to one embodiment of this disclosure, the control module is used to input the current actual capacity of the battery into a cutoff current determination model, so as to output the cutoff current according to the cutoff current determination model; wherein, the cutoff current determination model is a model established based on big data learning.

[0026] According to one embodiment of this disclosure, the control module is further configured to control the constant voltage charging process to stop when the charging current of the battery drops to the cutoff current during the constant voltage charging phase.

[0027] According to one embodiment of this disclosure, the control module is further configured to provide the determined cutoff current to the wireless charging device or the power supply device.

[0028] According to one embodiment of this disclosure, the control module is used to determine the charging current of the battery at different constant current charging stages based on the current actual capacity of the battery.

[0029] According to one embodiment of this disclosure, the control module is used to determine the cutoff current of the battery at different constant voltage charging stages based on the current actual capacity of the battery.

[0030] According to another aspect of this disclosure, a wireless charging device is provided, comprising: a control module, configured to acquire the current actual capacity of a battery, and determine the charging current of the battery during a constant current charging phase based on the current actual capacity of the battery.

[0031] According to one embodiment of this disclosure, the control module is further configured to control the battery to be charged by the determined charging current during the constant current charging phase.

[0032] According to one embodiment of this disclosure, the control module is used to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging or before the previous charging.

[0033] According to one embodiment of this disclosure, the control module is further configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

[0034] According to one embodiment of this disclosure, the control module is used to input the current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein, the charging current determination model is a model established based on big data learning.

[0035] According to one embodiment of this disclosure, the control module is further configured to determine the cutoff current of the battery during the constant voltage charging phase based on the current actual capacity of the battery.

[0036] According to one embodiment of this disclosure, the control module is used to input the current actual capacity of the battery into a cutoff current determination model, so as to output the cutoff current according to the cutoff current determination model; wherein, the cutoff current determination model is a model established based on big data learning.

[0037] According to one embodiment of this disclosure, the control module is further configured to control the constant voltage charging process to stop when the charging current of the battery drops to the cutoff current during the constant voltage charging phase.

[0038] According to one embodiment of this disclosure, the control module is used to determine the charging current of the battery at different constant current charging stages based on the current actual capacity of the battery.

[0039] According to one embodiment of this disclosure, the control module is used to determine the cutoff current of the battery at different constant voltage charging stages based on the current actual capacity of the battery.

[0040] According to another aspect of this disclosure, a power supply device is provided, comprising: a control module, configured to acquire the current actual capacity of a battery, and determine the charging current of the battery during a constant current charging phase based on the current actual capacity of the battery.

[0041] According to one embodiment of this disclosure, the control module is further configured to control the battery to be charged by the determined charging current during the constant current charging phase.

[0042] According to one embodiment of this disclosure, the control module is used to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging or before the previous charging.

[0043] According to one embodiment of this disclosure, the control module is further configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

[0044] According to one embodiment of this disclosure, the control module is used to input the current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein, the charging current determination model is a model established based on big data learning.

[0045] According to one embodiment of this disclosure, the control module is further configured to determine the cutoff current of the battery during the constant voltage charging phase based on the current actual capacity of the battery.

[0046] According to one embodiment of this disclosure, the control module is used to input the current actual capacity of the battery into a cutoff current determination model, so as to output the cutoff current according to the cutoff current determination model; wherein, the cutoff current determination model is a model established based on big data learning.

[0047] According to one embodiment of this disclosure, the control module is further configured to control the constant voltage charging process to stop when the charging current of the battery drops to the cutoff current during the constant voltage charging phase.

[0048] According to one embodiment of this disclosure, the control module is used to determine the charging current of the battery at different constant current charging stages based on the current actual capacity of the battery.

[0049] According to one embodiment of this disclosure, the control module is used to determine the cutoff current of the battery at different constant voltage charging stages based on the current actual capacity of the battery.

[0050] According to another aspect of this disclosure, a computer-readable storage medium is provided that stores computer-executable instructions thereon, which, when executed by a processor, implement any of the battery charging methods described above.

[0051] According to the battery charging method provided in this disclosure, by continuously measuring the battery capacity, the current actual capacity of the battery can be obtained, and the charging current of its constant current charging stage can be continuously adjusted according to the actual capacity, thereby slowing down the aging and degradation rate of the battery to the greatest extent and improving the battery's service life.

[0052] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0053] The above and other objects, features and advantages of this disclosure will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0054] Figure 1 This is a system structure diagram of a wireless charging system according to an exemplary embodiment;

[0055] Figure 2 This is a schematic diagram of another wireless charging system according to an exemplary embodiment;

[0056] Figure 3 This is a system structure diagram of a wired charging system according to an exemplary embodiment;

[0057] Figure 4 This is a system structure diagram of another wired charging system according to an exemplary embodiment;

[0058] Figure 5 This is a system structure diagram of another wired charging system according to an exemplary embodiment;

[0059] Figure 6 This is a flowchart illustrating a battery charging method according to an exemplary embodiment;

[0060] Figure 7 This is a flowchart illustrating another battery charging method according to an exemplary embodiment;

[0061] Figure 8 This is a block diagram illustrating a battery charging device according to an exemplary embodiment;

[0062] Figure 9 This is a schematic diagram illustrating a computer-readable storage medium according to an exemplary embodiment. Detailed Implementation

[0063] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make this disclosure more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0064] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known structures, methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0065] In this disclosure, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to an electrical connection or mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0066] Furthermore, in the description of this invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. "And / or" describes the relationship between related objects, indicating that three relationships can exist, for example, A and / or B, which can represent the existence of A alone, the existence of B alone, and the simultaneous existence of A and B. The symbol " / " generally indicates that the preceding and following related objects are in an "or" relationship. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0067] First, let's describe the current mainstream constant current constant voltage (CCCV) charging method:

[0068] The battery charging process may include: trickle charging stage (or mode), constant current charging stage (or mode), constant voltage charging stage (or mode) and supplementary charging stage (or mode).

[0069] During the trickle charging phase, the fully discharged battery is pre-charged (i.e., recovery charging). The trickle charging current is usually one-tenth of the constant current charging current. When the battery voltage rises above the trickle charging voltage threshold, the charging current is increased to enter the constant current charging phase.

[0070] During the constant current charging phase, the battery is charged with a constant current, causing the charging voltage to rise rapidly. Once the charging voltage reaches the battery's expected charging voltage threshold, the process transitions to the constant voltage charging phase. This constant current is typically a rated charging rate current, such as a high-rate 3C current, where C represents the battery capacity. Assuming a battery capacity of 1700mAh, the constant current would be 3 * 1700mA = 5.1A.

[0071] During the constant voltage charging phase, the battery is charged at a constant voltage, and the charging current gradually decreases. When the charging current drops to a set current threshold, the battery is fully charged. In CCCV charging, this current threshold is typically set to 0.01C, where C is the battery capacity. Assuming the battery capacity is 1700mAh, this current threshold is 0.01 * 1700mA = 17mA.

[0072] Once the battery is fully charged, some current is lost due to self-discharge, at which point it enters the supplementary charging phase. During this phase, the charging current is very small, only enough to keep the battery at full charge.

[0073] It should be noted that the constant current charging stage does not require the charging current to remain completely constant; for example, it can generally refer to the peak or average value of the charging current remaining constant over a period of time. In practice, the constant current charging stage can be performed using a multi-stage constant current charging method.

[0074] Segmented constant current charging can have M constant current stages (M is an integer not less than 2). Segmented constant current charging begins with a predetermined charging current in the first stage. The M constant current stages are executed sequentially from the first stage to the Mth stage. When transitioning from one constant current stage to the next, the current magnitude can decrease. When the battery voltage reaches the charging termination voltage threshold, the previous constant current stage will transition to the next constant current stage. The current transition between two adjacent constant current stages can be gradual or a step-like jump.

[0075] The following sections will introduce wireless charging systems and wired charging systems in the relevant technologies.

[0076] During wireless charging, a power supply device (such as an adapter) is typically connected to a wireless charging device (such as a wireless charging dock). The output power of the power supply device is then wirelessly transmitted to the device to be charged via the wireless charging device in a manner that is either electromagnetic or electromagnetic.

[0077] Based on different charging principles, wireless charging methods are mainly divided into three types: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves. Currently, the mainstream wireless charging standards include the Qi standard, the PowerMatters Alliance (PMA) standard, and the Alliance for Wireless Power (A4WP) standard. Both the Qi and PMA standards use magnetic coupling for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

[0078] Figure 1 This is a system structure diagram of a wireless charging system according to an exemplary embodiment.

[0079] refer to Figure 1 The wireless charging system 1 includes: a power supply device 11, a wireless charging device 12, and a device to be charged 13. The power supply device 11 may be, for example, a power adapter, a power bank, or similar device; the wireless charging device 12 may be, for example, a wireless charging dock; and the device to be charged 13 may be, for example, a terminal device.

[0080] After the power supply device 11 is connected to the wireless charging device 12, it transmits the current it outputs to the wireless charging device 12.

[0081] The wireless charging device 12 includes a wireless transmitting circuit 121 and a first control module 122.

[0082] The wireless transmitting circuit 121 is used to convert the electrical energy output by the power supply device 11 into electromagnetic signals (or electromagnetic waves) for transmission, thereby wirelessly charging the device 13 to be charged. For example, the wireless transmitting circuit 121 may include a wireless transmitting drive circuit and a transmitting coil (or transmitting antenna). The wireless transmitting drive circuit is used to convert the direct current output by the power supply device 11 into high-frequency alternating current, and then convert the high-frequency alternating current into electromagnetic signals (or electromagnetic waves) through the transmitting coil or transmitting antenna for transmission.

[0083] The first control module 122 can be implemented, for example, by a microcontroller unit (MCU). The first control module 122 can be used to wirelessly communicate with the device 13 to be charged during the wireless charging process by the wireless charging device 12. Specifically, the first control module 122 can wirelessly communicate with the second control module 135 in the device 13 to be charged.

[0084] In addition, the wireless charging device 12 may also include a charging interface 123. The wireless transmitting circuit 121 may also be used to receive electrical energy output from the power supply device 11 through the charging interface 123, and generate electromagnetic signals (or electromagnetic waves) according to the electrical energy output from the power supply device 11.

[0085] The charging interface 123 can be, for example, a USB 2.0 interface, a Micro USB interface, or a USB Type-C interface. In some embodiments, the charging interface 123 can also be a Lightning interface, or any other type of parallel or serial port that can be used for charging.

[0086] The wireless charging device 12 can communicate with the power supply device 11, for example, through the charging interface 123, without the need for additional communication interfaces or other wireless communication modules, thus simplifying the implementation of the wireless charging device 12. If the charging interface 123 is a USB interface, the wireless charging device 12 (or the wireless transmitting circuit 121) and the power supply device 13 can communicate based on the data lines (such as D+ and / or D- lines) in the USB interface. Alternatively, if the charging interface 123 is a USB interface supporting the Power Delivery (PD) communication protocol (such as a USB Type-C interface), the wireless charging device 12 (or the wireless transmitting circuit 121) and the power supply device 11 can communicate based on the PD communication protocol.

[0087] In addition, the wireless charging device 12 can also communicate with the power supply device 11 through other communication methods besides the charging interface 123. For example, the wireless charging device 12 can communicate with the power supply device 11 wirelessly, such as through Near Field Communication (NFC).

[0088] The device to be charged 13 may be, for example, a terminal or communication terminal, including but not limited to means configured to receive / transmit communication signals via a wired connection, such as via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and / or another data connection / network and / or via, for example, a wireless interface for a cellular network, wireless local area network (WLAN), digital television network such as a digital video broadcasting handheld (DVB-H) network, satellite network, amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or another communication terminal. A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," a "wireless terminal," and / or a "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiotelephone with data processing, fax, and data communication capabilities; personal digital assistants (PDAs) that may include radiotelephones, pagers, internet / intranet access, web browsers, notepads, calendars, and / or global positioning system (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. Furthermore, the terminal may also include, but is not limited to, rechargeable electronic devices with charging capabilities such as e-book readers, smart wearable devices, power banks (e.g., portable chargers), e-cigarettes, wireless mice, wireless keyboards, wireless headphones, and Bluetooth speakers.

[0089] The device to be charged 13 includes: a wireless receiving circuit 131, a battery 133, a first charging channel 134, a second control module 135, and a detection circuit 136.

[0090] The wireless receiving circuit 131 receives the electromagnetic signals (or electromagnetic waves) emitted by the wireless transmitting circuit 121 and converts them into direct current (DC) output by the wireless receiving circuit 131. For example, the wireless receiving circuit 131 may include a receiving coil or receiving antenna and shaping circuits such as rectifier circuits and / or filter circuits connected to the receiving coil or receiving antenna. The wireless receiving circuit 131 converts the electromagnetic signals (or electromagnetic waves) emitted by the wireless transmitting circuit 121 into alternating current (AC) through the receiving coil or receiving antenna, and then performs rectification and / or filtering operations on the AC power through the shaping circuit, thereby converting the AC power into stable DC power to charge the battery 133.

[0091] It should be noted that the embodiments disclosed herein do not specifically limit the form of the shaping circuit or the form of the output voltage and output current of the wireless receiving circuit 131 obtained after shaping by the shaping circuit.

[0092] In addition, in some embodiments, the device to be charged 13 may further include a first voltage conversion circuit 132. The first voltage conversion circuit 132 is disposed on the first charging channel 134 (e.g., a wire) and between the wireless receiving circuit 131 and the battery 133. When the output voltage of the wireless receiving circuit 131 cannot meet the expected charging voltage requirement of the battery 133, and / or the output current of the wireless receiving circuit 131 cannot meet the expected charging current requirement of the battery 133, the first voltage conversion circuit 132 can be used to convert the voltage to obtain the expected charging voltage and / or charging current of the battery 133. For example, the output voltage and output current of the wireless receiving circuit 131 are input to the first voltage conversion circuit 132 through the first charging channel 134; after the first voltage conversion circuit 132 converts the input voltage, the output voltage and current are applied to both ends of the battery 133 through the first charging channel 134 to meet the expected charging voltage and / or charging current requirements of the battery 133.

[0093] Battery 133 may include a single cell or multiple cells. When battery 133 includes multiple cells, the multiple cells may be connected in series. Therefore, the charging voltage that battery 133 can withstand is the sum of the charging voltages that the multiple cells can withstand, which can improve the charging speed and reduce charging heat generation.

[0094] For example, taking a mobile phone as an example of a device to be charged, when the battery 133 of the device to be charged 13 consists of a single cell, the voltage of the single cell is generally between 3.0V and 4.35V. However, when the battery 133 of the device to be charged 13 consists of two cells connected in series, the total voltage of the two cells is 6.0V-8.7V. Therefore, compared to a single cell, using multiple cells connected in series can increase the output voltage of the wireless receiving circuit 131. Compared to a single cell, to achieve the same charging speed, the charging current required by multiple cells is approximately 1 / N of the charging current required by a single cell (where N is the number of cells connected in series within the device to be charged 13). In other words, under the premise of ensuring the same charging speed (same charging power), using a multi-cell scheme can reduce the charging current, thereby reducing the heat generated by the device to be charged 13 during the charging process. On the other hand, compared to a single-cell scheme, while maintaining the same charging current, using a multi-cell series scheme can increase the charging voltage, thereby increasing the charging speed.

[0095] The second control module 135 can be implemented, for example, by a separate MCU, or by an application processor (AP) inside the device to be charged 13. The second control module 135 communicates with the first control module 122 in the wireless charging device 12, feeding back information such as the detected voltage and / or current value on the first charging channel 134, the remaining battery power of the battery 133, or the preset charging time to the wireless charging device 12. It can also feed back error information and termination information to the first control module 122. Furthermore, the feedback information may include voltage and / or current adjustment instructions determined by the device to be charged 13 based on the detected voltage and / or current value on the first charging channel 134, the remaining battery power, or the preset charging time.

[0096] The detection circuit 136 is used to detect the voltage and / or current value on the first charging channel 134. In some embodiments, when the device to be charged 13 is provided with a first voltage conversion circuit 132, the voltage and / or current value on the first charging channel 134 may refer to the voltage and / or current value between the first voltage conversion circuit 132 and the battery 133, that is, the output voltage and / or output current of the first voltage conversion circuit 132, which is directly applied to the battery 133 to charge the battery 133; or, the voltage and / or current value on the first charging channel 134 may refer to the voltage and / or current value between the wireless receiving circuit 131 and the first voltage conversion circuit 132, that is, the output voltage and / or current value of the wireless receiving circuit 131.

[0097] In some embodiments, the detection circuit 136 may include a voltage detection circuit and a current detection circuit.

[0098] The voltage detection circuit is used to sample the voltage on the first charging channel 134 and transmit the sampled voltage value to the second control module 135. The voltage detection circuit can, for example, sample the voltage on the first charging channel 134 using a series voltage divider method.

[0099] The current detection circuit is used to sample the current on the first charging channel 134 and transmit the sampled current value to the second control module 135. The current detection circuit can, for example, sample the current on the first charging channel 134 using a current-sensing resistor and a galvanometer.

[0100] After receiving the information fed back by the device to be charged 13 through the second control module 135, the first control module 122 can adjust the transmission power of the wireless transmission circuit 121 according to the voltage and / or current value on the first charging channel 134, or according to the voltage and / or current adjustment command mentioned above, so that the voltage and / or current of the DC power output by the first charging channel 134 matches the charging voltage and / or current required by the battery 133.

[0101] It should be understood that the above-mentioned "matching the charging voltage and / or current required by the battery 133" includes: the voltage and / or current of the DC power output by the first charging channel 134 is equal to or fluctuates within a preset range with the expected charging voltage and / or current of the battery 133 (e.g., the voltage value fluctuates by 100 mV to 200 mV).

[0102] Alternatively, after receiving information from the device to be charged 13 via the second control module 135, the first control module 122 can adjust the transmission power of the wireless transmission circuit 121 according to the voltage and / or current value on the first charging channel 134, or according to the aforementioned voltage and / or current adjustment command, so that the voltage and / or current of the DC power output by the first charging channel 134 meets the charging requirements of the battery 133 in at least one of the aforementioned trickle charging stage, constant current charging stage, and constant voltage charging stage.

[0103] Furthermore, as described above, the second control module 135 can also send battery status information to the first control module 122. This battery status information includes the current charge level and / or current voltage of the battery 133 in the device to be charged 13. Upon receiving this battery status information, the first control module 122 first determines the current charging stage of the battery 133 based on the information, and then determines a target output voltage value and / or target charging current that matches the current charging stage. Then, the first control module 122 compares the output voltage and / or output current of the first charging channel 134 sent by the second control module 135 with the determined target output voltage value and / or target charging current for the current charging stage of the battery 133 to determine whether the output voltage and / or output current of the first charging channel 134 matches the determined charging stage of the battery 133. If they do not match, the transmission power of the wireless transmitting circuit 121 is adjusted until the feedback output voltage and / or output current of the first charging channel 134 matches the current charging stage of the battery 133.

[0104] Furthermore, as described above, the second control module 135 can directly feed back the detected output voltage and / or output current of the first charging channel 134 to the first control module 121, or it can feed back an adjustment command determined based on the detected output voltage and / or output current of the first charging channel 134. This adjustment command could, for example, be a command to increase or decrease the transmission power of the wireless transmitting circuit 121. Alternatively, the wireless charging device 12 can also set multiple transmission power levels for the wireless transmitting circuit 121. Each time the first control module 121 receives this adjustment command, it adjusts the transmission power of the wireless transmitting circuit 121 by one level until the feedback output voltage and / or output current of the first charging channel 134 matches the current charging stage of the battery 133.

[0105] This disclosure does not limit the communication method and communication sequence between the wireless charging device 12 and the device to be charged 13 (or the first control module 122 and the second control module 135).

[0106] In some embodiments, the wireless communication between the wireless charging device 12 and the device to be charged 13 (or the first control module 122 and the second control module 135) can be unidirectional wireless communication. Taking the wireless charging process of the battery 133, where the device to be charged 13 is the initiator of communication and the wireless charging device 12 is the receiver, for example, during the constant current charging stage of the battery, the device to be charged 13 can detect the charging current of the battery 133 (i.e., the output current of the first charging channel 134) through the detection circuit 136. When the charging current of the battery 133 does not match the current charging stage, the device to be charged 13 sends feedback information or adjustment information to the wireless charging device 12, instructing the wireless charging device 12 to adjust the transmission power of the wireless transmitting circuit 121.

[0107] In some embodiments, the wireless communication between the wireless charging device 12 and the device to be charged 13 (or the first control module 122 and the second control module 135) can be bidirectional. Bidirectional wireless communication generally requires the receiver to send a response message to the initiator after receiving a communication request. Bidirectional communication also enhances the security of the communication process. During bidirectional wireless communication, either the wireless charging device 12 or the device to be charged 13 can initiate a bidirectional communication session as the master device. Correspondingly, the other device can act as the slave device, responding to the master device's communication with a first response or reply. Furthermore, the master device, upon receiving the first response or reply, issues a targeted second response, thereby completing one communication negotiation process between the master and slave devices.

[0108] The master device's targeted second response after receiving the first response or first reply includes: if the master device does not receive the slave device's first response or first reply regarding the communication session within a preset time, the master device will also make a targeted second response to the slave device's first response or first reply.

[0109] Furthermore, after the slave device responds to the communication session initiated by the master device, the master and slave devices can complete a communication negotiation process without the master device responding to the slave device's first response or reply.

[0110] During the communication process between the wireless charging device 12 and the device to be charged 13, the second control module 135 in the device to be charged 13 can couple the feedback information to the receiving coil of the wireless receiving circuit 131 and send it to the first control module 122 of the wireless charging device 12.

[0111] Alternatively, the device to be charged 13 can also communicate with the wireless charging device 12 via at least one of the following communication methods: Bluetooth, WiFi, mobile cellular network communication (such as 2G, 3G, 4G or 5G), wireless communication (such as IEEE 802.11, 802.15 (WPANs), 802.16 (WiMAX), 802.20, etc.), short-range wireless communication based on a high-frequency antenna (such as 60GHz), optical communication (such as infrared communication), ultrasonic communication, and ultra-wideband (UMB) communication, to send the aforementioned feedback information to the wireless charging device 12. It is understood that when communicating via the above-mentioned communication methods, the device to be charged 13 and the wireless charging device 12 also include corresponding communication modules, such as at least one of a Bluetooth communication module, a WiFi communication module, a 2G / 3G / 4G / 5G mobile communication module, a high-frequency antenna, an optical communication module, an ultrasonic communication module, and an ultra-wideband communication module. It should be understood that the standards that can be used for the above-mentioned wireless communication include conventional and existing standards, and, without departing from the scope of this disclosure, also include future versions and future standards that adopt these standards. Communication via the aforementioned wireless communication method improves communication reliability, thereby enhancing charging safety. Compared to related technologies (e.g., the Qi standard) that use signal modulation to couple feedback information to the receiving coil of the wireless receiving circuit 131, this method improves communication reliability and avoids voltage ripple caused by signal coupling, which could affect the voltage processing of the first voltage conversion circuit 132 of the device to be charged 13. Furthermore, voltage ripple at the output of the wireless receiving coil, if not effectively managed, can lead to wireless charging safety issues and pose certain safety hazards. Communication via the aforementioned wireless communication method eliminates voltage ripple, thereby eliminating the need for circuitry for voltage ripple processing, reducing the complexity of the charging circuitry of the device to be charged 13, improving charging efficiency, saving circuit space, and reducing costs.

[0112] The power supply device 11 can be a power supply device with a fixed output power or a power supply device with an adjustable output power. The power supply device with adjustable output power can be equipped with a voltage feedback loop and a current feedback loop, so that its output voltage and / or output current can be adjusted according to actual needs.

[0113] As described above, the wireless charging device 12 can continuously adjust the transmission power of the wireless transmitting circuit 121 during the charging process so that the output voltage and / or output current of the first charging channel 134 matches the current charging stage of the battery 133.

[0114] In some embodiments, the first control module 122 can adjust the amount of power drawn by the wireless transmitting circuit 121 from the maximum output power provided by the power supply device 11, thereby adjusting the transmission power of the wireless transmitting circuit 121. That is, the control over adjusting the transmission power of the wireless transmitting circuit 121 is assigned to the first control module 122. After receiving feedback information from the device to be charged 13, the first control module 122 can adjust the transmission power of the wireless transmitting circuit 121 by adjusting the amount of power drawn from the maximum output power, which has the advantages of fast adjustment speed and high efficiency.

[0115] For example, a power adjustment circuit can be provided inside the first control module 122, inside the wireless transmission circuit 121, or between the first control module 122 and the wireless transmission circuit 121. This power adjustment circuit may, for example, include a pulse width modulation (PWM) controller and a switching unit. The first control module 122 can adjust the transmission power of the wireless transmission circuit 121 by adjusting the duty cycle of the control signal issued by the PWM controller and / or by controlling the switching frequency of the switching unit.

[0116] Alternatively, in some embodiments, the first control module 122 can communicate with the power supply device 11 to adjust the output voltage and / or output current of the power supply device 11, thereby adjusting the transmission power of the wireless transmission circuit 121. That is, the control over adjusting the transmission power of the wireless transmission circuit 121 is delegated to the power supply device 11, which adjusts the transmission power of the wireless transmission circuit 121 by changing the output voltage and / or output current. The advantage of this adjustment method is that the power supply device 11 provides only the amount of power required by the wireless charging device 12, eliminating power waste.

[0117] It should be understood that, similar to the communication method between the wireless charging device 12 and the device to be charged 13, the communication between the wireless charging device 12 (or the first control module 122) and the power supply device 11 can be one-way communication or two-way communication, and this disclosure does not specifically limit it.

[0118] Figure 2 This is a schematic diagram of another wireless charging system according to an exemplary embodiment.

[0119] See Figure 2 ,and Figure 1The difference between the wireless charging system 1 and the wireless charging system 2 is that the wireless charging device 22 in the wireless charging system 2 further includes a second voltage conversion circuit 224. The second voltage conversion circuit 224 is disposed between the charging interface 123 and the wireless transmitting circuit 121, and can be used to receive the output voltage and output current of the power supply device 11. The wireless transmitting circuit 121 is used to generate electromagnetic signals (or electromagnetic waves) based on the voltage and current converted by the second voltage conversion circuit 224.

[0120] The first control module 122 may adjust the transmission power of the wireless transmission circuit 121 by adjusting the voltage and / or current converted by the second voltage conversion circuit 224 to adjust the transmission power of the wireless transmission circuit 121.

[0121] When the power supply device 11 is a power supply device with a fixed output power, the first control module can adjust the output voltage and / or output current of the second voltage conversion circuit 224, thereby adjusting the transmission power of the wireless transmission circuit 121. This improves the versatility of the wireless charging device 22, making it suitable for existing common power supply devices 11. The second voltage conversion circuit 224 may include, for example, a PWM controller and a switching unit. The first control module can adjust the output voltage and / or output current of the second voltage conversion circuit 224 by adjusting the duty cycle of the control signal issued by the PWM controller and / or by controlling the switching frequency of the switching unit, thereby adjusting the transmission power of the wireless transmission circuit 121.

[0122] Optionally, in some embodiments, the second voltage conversion circuit 224 can receive the output voltage and output current of the power supply device 11 through the charging interface 123. For example, when the power supply device 11 is a common power supply device, the wireless charging device 22 is connected to the common power supply device through the charging interface 123. During wireless charging, the first control module 122 can control the second voltage conversion circuit 224 to start working and adjust the output voltage and / or output current of the second voltage conversion circuit 224 according to the feedback information from the device to be charged 13, so that the transmission power of the wireless transmitting circuit 121 meets the charging requirements of the current battery 133. This adjustment method also assigns the control of adjusting the transmission power of the wireless transmitting circuit 121 to the first control module 122. The first control module 122 can immediately adjust the transmission power of the wireless transmitting circuit 121 after receiving the feedback information from the device to be charged 13, which has the advantages of fast adjustment speed and high efficiency.

[0123] It should also be understood that the output current of the power supply device 11 can be constant direct current, pulsating direct current or alternating current, and this disclosure does not specifically limit it.

[0124] The above description uses the example of a wireless charging device 12 or 22 connected to a power supply device 11 and obtaining power from the power supply device 11 as an example. However, this disclosure is not limited to this. The wireless charging device 12 or 22 can also integrate a function similar to an adapter, thereby directly converting externally input AC power (such as mains power) into the aforementioned electromagnetic signals (or electromagnetic waves). For example, the adapter function can be integrated into the wireless transmitting circuit 121 of the wireless charging device 12 or 22. For instance, a rectifier circuit, a primary filter circuit, and / or a transformer can be integrated into the wireless transmitting circuit 121. In this way, the wireless transmitting circuit 121 can be used to receive externally input AC power (such as 220V AC power, or mains power) and generate electromagnetic signals (or electromagnetic waves) based on the AC power. Integrating a function similar to an adapter inside the wireless charging device 12 or 22 eliminates the need for the wireless charging device 12 or 22 to obtain power from an external power supply device, improving the integration of the wireless charging device 12 or 22 and reducing the number of components required to implement the wireless charging process.

[0125] Furthermore, the aforementioned power supply device 11 includes a fast-charging type power supply device and a normal type power supply device. The fast-charging type power supply device provides a maximum output power greater than or equal to a preset value. The normal type power supply device provides a maximum output power less than this preset value. It should be understood that in this embodiment, the fast-charging type power supply device and the normal type power supply device are classified only by their maximum output power, without distinguishing other characteristics of the power supply device. That is, fast-charging type and normal type can be equivalent to the first type and the second type, respectively. For example, a power supply device with a maximum output power greater than or equal to 20W can be classified as a fast-charging type power supply device, while a power supply device with a maximum output power less than 20W can be classified as a normal type power supply device.

[0126] Accordingly, the wireless charging device 12 or 22 can support a first wireless charging mode and a second wireless charging mode. The wireless charging device 12 or 22 charges the device 13 to be charged faster in the first wireless charging mode than it does in the second wireless charging mode. In other words, compared to the wireless charging device 12 or 22 operating in the second wireless charging mode, the wireless charging device 12 or 22 operating in the first wireless charging mode takes less time to fully charge the battery of the device 13 to be charged with the same capacity.

[0127] The first wireless charging mode can be a fast wireless charging mode. This fast wireless charging mode can refer to a wireless charging mode in which the wireless charging device 12 or 22 has a large transmission power (usually greater than or equal to 15W).

[0128] The second wireless charging mode can be a normal wireless charging mode, which can refer to a wireless charging method with a lower transmission power (usually less than 15W, with 5W or 10W being commonly used) of the wireless charging device 12 or 22. For example, it can be a traditional wireless charging mode based on the Qi standard, PMA standard or A4WP standard.

[0129] In normal wireless charging mode, it usually takes several hours to fully charge a large-capacity battery (such as a 3000 mAh battery); however, in fast wireless charging mode, due to the faster charging speed, the charging time required to fully charge the same capacity battery can be significantly shortened.

[0130] In some embodiments, the first control module 122 and the second control module 135 communicate bidirectionally to control the transmission power of the wireless transmitting circuit 121 in the first wireless charging mode.

[0131] In some embodiments, the process of the first control module 122 and the second control module 135 communicating bidirectionally to control the transmission power of the wireless transmitting circuit 121 in the first wireless charging mode may include: the first control module 122 and the second control module 135 communicating bidirectionally to negotiate the wireless charging mode between the wireless charging device 12 or 22 and the device to be charged 13.

[0132] For example, the first control module 122 and the second control module 135 perform handshake communication. If the handshake communication is successful, the wireless charging device 12 or 22 is controlled to use the first wireless charging mode to charge the device 13 to be charged. If the handshake communication fails, the wireless charging device 12 or 22 is controlled to use the second wireless charging mode to charge the device 13 to be charged.

[0133] Handshake communication refers to the identification of each other by the communicating parties. A successful handshake communication indicates that both the wireless charging device 12 or 22 and the device to be charged 13 support wireless charging with adjustable transmission power. A failed handshake communication indicates that at least one of the wireless charging device 12 or 22 and the device to be charged 13 does not support wireless charging with adjustable transmission power.

[0134] In this disclosure, the wireless charging device 12 or 22 does not blindly adopt the first wireless charging mode to quickly wirelessly charge the device 13 to be charged. Instead, it communicates bidirectionally with the device 13 to negotiate whether the wireless charging device 12 or 22 can adopt the first wireless charging mode to quickly wirelessly charge the device 13 to be charged. This can improve the safety of the charging process.

[0135] In some embodiments, the first control module 122 and the second control module 135 communicate bidirectionally to negotiate the wireless charging mode between the wireless charging device 12 or 22 and the device 13 to be charged. For example, this may include: the first control module 122 sending a first instruction to the second control module 135, the first instruction being used to inquire whether the device 13 to be charged should enable the first wireless charging mode; the first control module 122 receiving a reply instruction from the second control module 135 in response to the first instruction, the reply instruction being used to indicate whether the device 13 to be charged agrees to enable the first wireless charging mode; if the device 13 to be charged agrees to enable the first wireless charging mode, the first control module controls the wireless charging device 12 or 22 to charge the device 13 to be charged using the first wireless charging mode.

[0136] In addition to determining the wireless charging mode based on communication negotiation, the first control module 122 can also select or switch the wireless charging mode based on other factors. For example, the first control module 122 can also control the wireless charging device 12 or 22 to charge the battery 133 using either the first or second wireless charging mode based on the temperature of the battery 133. For instance, when the temperature is below a preset low-temperature threshold (e.g., 5°C or 10°C), the first control module 122 can control the wireless charging device 12 or 22 to use the second wireless charging mode for normal charging. When the temperature is greater than or equal to the low-temperature threshold, the first control module 122 can control the wireless charging device 12 or 22 to use the first wireless charging mode for fast charging. Furthermore, when the temperature is above a high-temperature threshold (e.g., 50°C), the first control module 122 can control the wireless charging device 12 or 22 to stop charging.

[0137] Before introducing wired charging systems, let's first explain the "normal charging mode" and "fast charging mode" within them. Normal charging mode refers to the adapter outputting a relatively small current (typically less than 2.5A) or a relatively small power (typically less than 15W) to charge the battery in the device being charged. In normal charging mode, fully charging a large-capacity battery (such as a 3000mAh battery) typically takes several hours. Fast charging mode, on the other hand, refers to the adapter outputting a relatively large current (typically greater than 2.5A, such as 4.5A, 5A, or even higher) or a relatively large power (typically greater than or equal to 15W) to charge the battery in the device being charged. Compared to normal charging mode, the adapter charges much faster in fast charging mode, significantly reducing the charging time required to fully charge the same capacity battery.

[0138] During wired charging, the power supply device (such as an adapter) is generally connected to the device to be charged via a cable. The power supplied by the power supply device is then transmitted to the device to be charged via the cable to charge the device.

[0139] Figure 3 This is a system structure diagram of a wired charging system according to an exemplary embodiment.

[0140] refer to Figure 3 The wired charging system 3 includes a power supply device 31 and a device to be charged 32. The power supply device 31 may be, for example, a power adapter, a power bank, or other similar device; the device to be charged 32 may be, for example, a terminal device.

[0141] The device 32 to be charged can be charged by a 10W (5V / 2A) power supply device 31, that is, the power supply device 31 charges the device 32 to be charged using the above-mentioned normal charging mode.

[0142] The power supply device 31 includes: a rectifier circuit 311, a filter circuit 312, and a charging interface 313.

[0143] The rectifier circuit 311 is used to convert the input AC power into DC power, and the filter circuit 312 is used to filter the DC power output by the rectifier circuit 311 so as to provide a stable DC power to the device 32 connected to it through the charging interface 313.

[0144] The device to be charged 32 includes: a charging interface 321, a battery unit 322, and a charging integrated circuit (IC) 323.

[0145] The device to be charged 32 receives electrical energy from the power supply device 31 through the charging interface 321. The charging interface 321 can be, for example, a USB 2.0 interface, a Micro USB interface, or a USB Type-C interface. In some embodiments, the charging interface 123 can also be a Lightning interface, or any other type of parallel or serial port capable of charging. The battery cell 322 is, for example, a single lithium battery cell, whose charging cutoff voltage is typically 4.2V. Therefore, a charging integrated circuit 323 is required to convert the 5V voltage into a charging voltage suitable for the battery cell 322.

[0146] Furthermore, the charging integrated circuit 323 can also function as a conversion circuit to control the charging voltage and / or charging current of the battery cell 322 during the different charging stages described above. For example, during the constant current charging stage, the conversion circuit can utilize a current feedback loop to ensure that the current entering the battery meets the expected first charging current of the battery. During the constant voltage charging stage, the conversion circuit can utilize a voltage feedback loop to ensure that the voltage applied across the battery cell 322 meets the expected charging voltage of the battery. During the trickle charging stage, the conversion circuit can utilize a current feedback loop to ensure that the current entering the battery meets the expected second charging current of the battery (the second charging current is less than the first charging current).

[0147] The charging integrated circuit 323 can also acquire battery capacity information of the battery cell 322 to adjust the charging voltage and / or charging current applied to the two ends of the battery cell 322 based on the battery capacity information of the battery cell 322. For example, the charging integrated circuit 323 can measure the charging voltage and / or charging current using a fuel gauge.

[0148] Figure 4 This is a system architecture diagram of another wired charging system according to an exemplary embodiment.

[0149] refer to Figure 4 The wired charging system 4 includes a power supply device 41 and a device 42 to be charged. The power supply device 41 may be, for example, a power adapter, a power bank, or a similar device; the device 42 to be charged may be, for example, a terminal device.

[0150] The device 42 to be charged can be quickly charged by a 20W (5V / 4A) high-power power supply device 41, that is, the power supply device 41 uses the above-mentioned fast charging mode to charge the device 42 to be charged.

[0151] The power supply device 41 includes: a rectifier circuit 411, a filter circuit 412, a voltage conversion circuit 413, a first control unit 414, and a charging interface 415.

[0152] The system includes a rectifier circuit 411 that converts input AC power into DC power; a filter circuit 412 that filters the DC power output from the rectifier circuit 411 to provide stable DC power; a voltage conversion circuit 413 that converts the DC power output from the filter circuit 412 into voltage, typically a step-down circuit, to provide a suitable DC voltage to the device 42 connected to it via the charging interface 415; and a first control unit 414 that receives feedback from the device 42 to control the voltage and / or current of the DC power output from the rectifier circuit 411. Furthermore, the first control unit 414 also controls the charging voltage and / or charging current of the battery cell 422 of the device 42 to be charged during different charging stages (such as constant current charging stage, constant voltage charging stage, etc.).

[0153] In some embodiments, the power supply device 41 may also provide pulsating DC power to charge the device 42 to be charged. The power supply device 41 outputs pulsating DC power, for example, by removing the aforementioned filter circuit 412, so that the unfiltered current output by the rectifier circuit 411, after passing through the voltage conversion circuit 413 and the charging interface 415, directly supplies power to the device 42 to be charged. Alternatively, the electrolytic capacitors included in the aforementioned filter circuit 412 may be removed to achieve the output of pulsating DC power.

[0154] The device to be charged 42 includes: a charging interface 421, a battery unit 422, a second control unit 423, a detection circuit 424, and a charging circuit 425.

[0155] The charging circuit 425 is connected to the charging interface 421 and the battery unit 422, and is used to charge the battery unit 422. The charging interface 421 can be, for example, a USB 2.0 interface, a Micro USB interface, or a USB Type-C interface. In some embodiments, the charging interface 421 can also be a Lightning interface, or any other type of parallel or serial port that can be used for charging.

[0156] Taking a lithium battery containing a single lithium battery cell as an example, since there is a voltage conversion circuit 413 in the power supply device 41, the voltage output by the power supply device 41 can be directly applied to both ends of the battery cell 422. Therefore, the charging circuit 425 charges the battery cell 422 in a direct charging manner. The electrical energy output by the power supply device 41 is directly supplied to the battery cell 422 to charge the battery after passing through the charging circuit 425 without voltage conversion. Optionally, the charging circuit 425 can be a switching circuit. The voltage drop after the current output by the power supply device 41 passes through the charging circuit 425 is very small, so that it will not have a substantial impact on the charging process of the battery cell 422.

[0157] The detection circuit 424 is used to detect the voltage and / or current values ​​between the charging circuit 425 and the battery cell 422, that is, the output voltage and / or output current of the charging circuit 425, which are directly applied to the battery cell 422 to charge the battery cell 422. In addition, the detection circuit 424 may also include a fuel gauge for detecting the capacity of the battery cell 422.

[0158] The second control unit 423 communicates with the power supply device 41 to transmit the voltage and / or current values ​​detected by the detection circuit 424 on the battery cell 422, as well as the battery capacity information of the battery cell 422, to the power supply device 41. The second control unit 423 can communicate with the power supply device 41, for example, through the charging interface 421, without requiring an additional communication interface or other wireless communication module. If the charging interface 421 is a USB interface, the second control unit 423 and the power supply device 41 can communicate based on the data lines (such as D+ and / or D- lines) in the USB interface. Alternatively, if the charging interface 421 is a USB interface supporting the power transfer (PD) communication protocol (such as a USB Type-C interface), the second control unit 423 and the power supply device 41 can communicate based on the PD communication protocol. Furthermore, the second control unit 423 can also communicate with the power supply device 41 through other communication methods besides the charging interface 421. For example, the second control unit 423 can communicate wirelessly with the power supply device 41, such as through near-field communication.

[0159] For devices containing a single battery cell, significant heat generation occurs when charging a single cell with a large charging current. To ensure charging speed and alleviate heat generation during charging, the battery structure can be modified to use multiple cells connected in series. These multiple cells can then be directly charged, meaning the adapter's output voltage is directly applied to the two ends of the battery cell containing the multiple cells. Compared to a single-cell solution (assuming the capacity of the single cell before the improvement is the same as the total capacity of the series-connected cells after the improvement), to achieve the same charging speed, the charging current required for multiple cells is approximately 1 / N of the charging current required for a single cell (where N is the number of cells connected in series). In other words, while maintaining the same charging speed, connecting multiple cells in series can significantly reduce the charging current, thereby further reducing heat generation during charging.

[0160] Figure 5 This is a system structure diagram of another wired charging system according to an exemplary embodiment.

[0161] refer to Figure 5The wired charging system 5 includes a power supply device 51 and a device to be charged 52. The power supply device 51 may be, for example, a power adapter, a power bank, or other similar device; the device to be charged 52 may be, for example, a terminal device.

[0162] The device 52 to be charged can be quickly charged by a 50W (10V / 5A) high-power power supply device 51, that is, the power supply device 51 charges the device 52 to be charged using the above-mentioned fast charging mode.

[0163] The power supply device 51 includes: a rectifier circuit 511, a filter circuit 512, a voltage conversion circuit 513, a first control unit 514, and a charging interface 515.

[0164] The rectifier circuit 511 converts the input AC power into DC power; the filter circuit 512 filters the DC power output from the rectifier circuit 511 to provide stable DC power; the voltage conversion circuit 513 converts the DC power output from the filter circuit 512 to provide a suitable DC voltage to the device 52 connected to it via the charging interface 515; and the first control unit 514 receives feedback from the device 52 to control the voltage and / or current of the DC power output from the rectifier circuit 511. Furthermore, the first control unit 514 also controls the charging voltage and / or charging current of the first battery cell 522 and the second battery cell 522' of the device 52 to be charged during different charging stages (such as constant current charging stage, constant voltage charging stage, etc.).

[0165] In some embodiments, the power supply device 51 may also provide pulsating DC power to charge the device 52 to be charged. The power supply device 51 outputs pulsating DC power, for example, by removing the aforementioned filter circuit 512, so that the unfiltered current output by the rectifier circuit 511, after passing through the voltage conversion circuit 513 and the charging interface 515, directly supplies power to the device 52 to be charged. Alternatively, the electrolytic capacitors included in the aforementioned filter circuit 512 may be removed to achieve the output of pulsating DC power.

[0166] The device to be charged 52 includes: a charging interface 521, a first battery unit 522, a second battery unit 522', a second control unit 523, a detection circuit 524, and a charging circuit 525.

[0167] The charging interface 521 can be, for example, a USB 2.0 interface, a Micro USB interface, or a USB Type-C interface. In some embodiments, the charging interface 521 can also be a Lightning interface, or any other type of parallel or serial port that can be used for charging.

[0168] The first battery cell 522 and the second battery cell 522' are connected in series. For example, both the first battery cell 522 and the second battery cell 522' are lithium batteries containing a single cell. The charging circuit 525 is connected to the charging interface 521 and the series-connected first battery cell 522 and second battery cell 522', and is used to charge the first battery cell 522 and second battery cell 522'. The voltage output from the power supply device 51 can be directly applied to the two ends of the series-connected first battery cell 522 and second battery cell 522', that is, the charging circuit 35 uses a direct charging method to charge the series-connected first battery cell 522 and second battery cell 522'. It should be noted that because the charging circuit 525 uses a direct charging method to charge the series-connected first battery cell 522 and second battery cell 522', and because line impedance will cause a voltage drop in the charging line, the output voltage received by the charging circuit 525 from the power supply device 51 needs to be greater than the total voltage of the multiple cells contained in the first battery cell 522 and second battery cell 522'. Generally speaking, the working voltage of a single battery cell is between 3.0V and 4.35V. Taking two battery cells connected in series as an example, the output voltage of the power supply device 51 can be set to be greater than or equal to 10V.

[0169] The detection circuit 524 is used to detect the voltage and / or current values ​​between the charging circuit 525 and the first battery cell 522 and the second battery cell 522', that is, the output voltage and / or output current of the charging circuit 525, which are directly applied to the first battery cell 522 and the second battery cell 522' to charge the first battery cell 522 and the second battery cell 522'. In addition, the detection circuit 524 may also include a fuel gauge for detecting the capacity of the first battery cell 522 and the second battery cell 522'.

[0170] The second control unit 523 communicates with the power supply device 51 to transmit the voltage and / or current values ​​detected by the detection circuit 524 onto the first battery cell 522 and the second battery cell 522', as well as the battery capacity information of the first battery cell 522 and the second battery cell 522', to the power supply device 51. The second control unit 523 can communicate with the power supply device 51, for example, through the charging interface 521, without requiring an additional communication interface or other wireless communication module. If the charging interface 521 is a USB interface, the second control unit 523 and the power supply device 51 can communicate based on the data lines (such as D+ and / or D- lines) in the USB interface. Alternatively, if the charging interface 521 is a USB interface supporting the Power Transfer (PD) communication protocol (such as a USB Type-C interface), the second control unit 523 and the power supply device 51 can communicate based on the PD communication protocol. Furthermore, the second control unit 523 can also communicate with the power supply device 51 through other communication methods besides the charging interface 521. For example, the second control unit 523 can communicate wirelessly with the power supply device 51, such as through near-field communication.

[0171] It should be noted that the block diagrams shown in the above figures are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0172] In current constant current / constant voltage charging methods, the constant current charging current is determined based on the battery's initial capacity (rated capacity) during the constant current charging phase. However, as charging and discharging cycles continue, the battery capacity decreases. If the constant current calculated based on the battery's initial rated capacity is continued, it will exceed the initially set optimal current. For example, taking a charging rate of 3C as an example, assuming the battery's rated capacity is 1700mAh, the initially calculated constant current charging current is 3 * 1700mA = 5.1A. After the battery has been cycled several hundred times, its capacity will decrease to approximately 80% of its initial capacity, i.e., 1700mAh * 0.8 = 1360mAh. If a constant current of 5.1A is still used for charging at this point, the charging rate increases to 3.7C, which exceeds the optimal usage rate designed for the battery system. Using it at an excessive rate will accelerate the aging of the battery's internal materials and may also accelerate the accumulation of lithium ions (Li+) on the negative electrode surface, increasing the probability of lithium plating on the negative electrode surface and increasing the risk of battery short circuits. At the same time, if the battery is already aging, it will further accelerate the decline in battery capacity and also accelerate the aging of battery life.

[0173] To address the aforementioned issues, this disclosure proposes a battery charging method that can prevent battery aging. This method determines the charging current during a constant charging phase based on the measured actual capacity of the current battery, thereby avoiding accelerated battery aging caused by overcharging.

[0174] Figure 6 This is a flowchart illustrating a battery charging method according to an exemplary embodiment. Figure 6 The battery charging method 10 shown can be applied to the above. Figure 1 or Figure 2 The wireless charging system 1 or 2 shown can also be applied to the above-mentioned wireless charging system. Figures 3-5 The wired charging systems shown are 3, 4, or 5.

[0175] refer to Figure 6 Battery charging method 10 includes:

[0176] In step S102, the current actual capacity of the battery is obtained.

[0177] Taking the aforementioned wired or wireless charging systems as examples, the current capacity of the battery can be measured using a detection circuit (such as a fuel gauge) connected to the battery. Measurement can be performed either after each charge cycle or before the next charge cycle.

[0178] For example, the first control module 122 in the wireless charging device 12 or 22 of the wireless charging system 1 or 2 can obtain the current actual capacity of the battery from the device to be charged 13. When the detection circuit detects the current actual capacity of the battery after charging is completed, the first control module 122 can directly obtain and store the current actual capacity of the battery for the next charging, or it can obtain the current actual capacity of the battery before the next charging. That is, the battery capacity can be stored by the storage module in the device to be charged 13 itself and provided to the first control module 122 before the next charging. When the detection circuit detects the current actual capacity of the battery before the next charging, the first control module 122 can obtain and store the current actual capacity after the detection circuit in the device to be charged 13 measures the current actual capacity of the battery.

[0179] Alternatively, the current actual capacity of the battery can be obtained by the charging integrated circuit 323 in the device to be charged 32 in the wired charging system 3. Similarly, the detection circuit in the device to be charged 32 can measure the battery's current capacity after charging is complete, or it can measure it before the next charge. If the measurement is taken after charging is complete, it needs to be stored for use in the next charge.

[0180] Alternatively, the current actual capacity of the battery can be obtained by the first control unit 414 in the power supply device 41 of the wired charging system 4 or the first control unit 514 in the power supply device 51 of the wired charging system 5. Similarly, when the detection circuit detects the current actual capacity of the battery after charging is complete, the first control unit 414 or 514 can directly obtain and store the current actual capacity of the battery for the next charging cycle, or it can obtain the current actual capacity of the battery before the next charging cycle. That is, the battery capacity can be stored by the storage module in the device to be charged 42 or 52 itself, and provided to the first control unit 414 or 514 before the next charging cycle. When the detection circuit detects the current actual capacity of the battery before the next charging cycle, the first control unit 414 or 514 can obtain and store the current actual capacity after the detection circuit in the device to be charged 42 or 52 measures the current actual capacity of the battery.

[0181] Alternatively, the battery capacity can be obtained by the second control module 135 in the device 13 to be charged in the wireless charging system 1 or 2. Similarly, the detection circuit in the device 13 to be charged can measure the battery capacity after charging is complete, or it can measure it before the next charge. If the measurement is taken after charging is complete, it needs to be stored for use in the next charge.

[0182] Alternatively, the battery capacity can be obtained by the second control unit 423 or 523 in the device to be charged 42 or 52 of the wired charging system 4 or 5. Similarly, the detection circuit in the device to be charged 42 or 52 can measure the battery's capacity after charging is complete, or it can measure it before the next charge. If the measurement is taken after charging is complete, it needs to be stored for use in the next charge.

[0183] In step S104, the charging current of the battery during the constant current charging phase is determined based on the battery's current actual capacity.

[0184] Once the current actual capacity of the battery is obtained, the charging current during the constant current charging phase can be adjusted based on this current actual capacity, thereby improving the battery's lifespan.

[0185] The operation of determining the charging current of the battery during the constant current charging phase based on the battery's current actual capacity can be performed, for example, by the first control module 122 in the wireless charging device 12 or 22 of the wireless charging system 1 or 2, or by the first control unit 414 or 514 in the power supply device 41 or 51 of the wired charging system 4 or 5, after obtaining the battery's current actual capacity.

[0186] In addition, the above operation can also be performed by the second control module 135 in the device 13 to be charged in the wireless charging system 1 or 2, or by the charging integrated circuit 323 in the device 32 to be charged in the wired charging system 3, or by the second control unit 423 or 523 in the device 42 or 52 to be charged in the wired charging system 4 or 5, after obtaining the current actual capacity of the battery.

[0187] In some embodiments, the current actual capacity of the battery can be compared with the current actual capacity measured after or before the previous charge. When the current actual capacity is greater than or equal to the previous actual capacity, the charging current during the constant current charging phase is determined to be the previous charging current; when the current actual capacity is less than the previous actual capacity, a new charging current is calculated based on the current actual capacity, and this new charging current is determined to be the charging current during the constant current charging phase. For example, taking a rated rate of 3C and a rated capacity of 1700mAh as an example, the initial charging current is 3 * 1700mA = 5.1A. If the current actual capacity of the battery is 1360mAh, the new charging current calculated based on the current actual capacity is 3 * 1360mAh, approximately 4.1A. This avoids the problem of exceeding the rated rate if the battery is still charged with the originally set charging current after cycle charging and discharging.

[0188] It should be noted that the aforementioned "previous time" can be, for example, the previous time, meaning that the battery's current actual capacity needs to be measured after each charging cycle or before charging. Based on the current actual capacity, the charging current for the constant current charging phase is determined, and this current actual capacity is stored for use as the battery's previous actual capacity when determining the charging current next time. Alternatively, considering that the battery's actual capacity may not change significantly between adjacent charging cycles, "previous time" can also be the previous N times, where N is a preset number of times. That is, the battery's current actual capacity can be measured and stored only after every N charging cycles, after charging or before charging. Based on the current actual capacity, the charging current for the constant current charging phase is determined, and this current actual capacity is stored for use as the battery's previous actual capacity when determining the charging current next time. The number of times threshold can be determined according to actual needs in application, and this disclosure is not limited to this.

[0189] In some embodiments, the current actual capacity of the battery can be input into a charging current determination model established through big data learning. This model can be, for example, a table relating battery capacity to charging current, obtained through statistical learning from a large amount of experimental data. Based on the battery's current actual capacity in this table, the new charging current corresponding to that current actual capacity can be quickly retrieved. Alternatively, the charging current determination model can be a table relating battery capacity to charging current calculation coefficients, also obtained through statistical learning from a large amount of experimental data. That is, when the battery capacity decreases, the corresponding calculation coefficients (such as coefficient 3 in the initial charging rate 3C) will change accordingly when calculating the new charging current. After retrieving the corresponding new coefficient from the table based on the battery's current actual capacity, the new coefficient is multiplied by the current actual capacity to obtain the new charging current. Alternatively, the charging current determination model can be a trained model based on an artificial neural network, trained on a large amount of experimental data. This model takes the battery capacity as input and the charging current as output, so that the current actual capacity can be input into the trained model to obtain the charging current output by the model.

[0190] In some embodiments, the battery charging method 10 may further include:

[0191] In step S106, the battery is controlled to be charged with the determined charging current during the constant current charging phase.

[0192] For example, when the charging current is determined by the first control module 122 in the wireless charging device 12 or 22 of the wireless charging system 1 or 2, the output power of the wireless transmitting circuit 121 can be adjusted by the first control module 122 so that the DC current output by the first charging channel 134 meets the charging requirements of the battery during the constant current charging stage, i.e., the determined charging current. When the charging current is determined by the second control module 135 in the device to be charged 13 of the wireless charging system 1 or 2, the second control module 135 can feed the charging current back to the first control module 122 so that the first control module 122 can adjust the power of the wireless transmitting circuit 121. That is, the operation of obtaining the current battery level and determining the charging current of the battery during the constant current charging stage based on the current battery level can be performed in the wireless charging device 12 or 22; or, it can also be performed in the device to be charged 13. If the charging is performed in the device to be charged 13, the determined charging current can be fed back to the wireless charging device 12 or 22 so that it can adjust the transmission power and charge the battery with the determined charging current.

[0193] When the charging current is determined by the first control unit 414 or 514 in the power supply device 41 or 51 of the wired charging system 4 or 5, the first control unit 414 or 514 can control the DC current output by the rectifier circuit 411 or 511, thereby ensuring that the charging current applied to the battery in the device to be charged 42 or 52 meets its charging requirements during the constant current charging phase, i.e., the determined charging current. When the charging current is determined by the second control unit 423 or 523 in the device to be charged 42 or 52, the second control unit 423 or 523 also needs to feed the charging current back to the first control unit 414 or 514 so that the first control unit 414 or 514 can adjust the output current of the rectifier circuit 411 or 511. In other words, the operation of obtaining the current battery charge and determining the charging current of the battery during the constant current charging phase based on the current charge can be performed in the power supply device 41 or 51; or, it can be performed in the device to be charged 42 or 52. If the charging is performed in the device 42 or 52 to be charged, the determined charging current can be fed back to the power supply device 41 or 51 so that it can adjust the output current and charge the battery with the determined charging current.

[0194] According to the battery charging method provided in this disclosure, by continuously measuring the battery capacity, the current actual capacity of the battery can be obtained, and the charging current of its constant current charging stage can be continuously adjusted according to the actual capacity, thereby slowing down the aging and degradation rate of the battery to the greatest extent and improving the battery's service life.

[0195] It should be clearly understood that this disclosure describes how specific examples are formed and used, but the principles of this disclosure are not limited to any details of these examples. Rather, based on the teachings of this disclosure, these principles can be applied to many other implementations.

[0196] The FFC charging algorithm uses an initial current rate to charge the battery at a constant current until a cutoff voltage is reached, and then uses that cutoff voltage to charge it at a constant voltage until a cutoff current is reached. Unlike the CCCV charging algorithm, this cutoff voltage is higher than the battery's factory rated voltage. For example, if the battery's rated cutoff voltage is 4.2V, the cutoff voltage in the FFC algorithm is typically set to 4.25V. The cutoff current at the end of the constant voltage charging phase is also higher than the factory-set rated cutoff current. For instance, the conventional CCCV algorithm uses a rated cutoff current of 0.01C, while the FFC algorithm might set it to 0.1C. The voltage exceeding the rated voltage during constant current charging assumes the existence of a floating voltage, meaning the actual battery voltage may not reach the rated voltage. The increase in the cutoff current during constant voltage charging, i.e., early cutoff, is based on the battery's full charge capacity. Similarly, as the battery undergoes continuous charge-discharge cycles, its actual capacity decreases. Therefore, when the battery capacity decays, cutting off with the same current significantly exceeds the current that the battery can actually withstand. At this time, more lithium ions are released from the positive electrode, which further reduces the structural stability of the positive electrode material, accelerates the structural damage of the material, and thus reduces the battery's lifespan.

[0197] Based on this, the present disclosure further provides a method for optimizing battery charging to improve battery life.

[0198] Figure 7 This is a flowchart illustrating another battery charging method according to an exemplary embodiment. Figure 6 The difference in the battery charging method 10 shown is that, Figure 7 The battery charging method 20 shown further provides a method for dynamically adjusting the cutoff current during the constant voltage charging phase.

[0199] refer to Figure 7 Battery charging method 20 includes:

[0200] In step S202, the cutoff current of the battery during the constant voltage charging phase is determined based on the battery's current actual capacity.

[0201] After obtaining the battery's current actual capacity, the cutoff current during the constant voltage charging phase can be further adjusted based on the battery's current actual capacity to improve battery life.

[0202] The operation of determining the cutoff current of the battery during the constant voltage charging phase based on the battery's current actual capacity can be performed, for example, by the first control module 122 in the wireless charging device 12 or 22 of the wireless charging system 1 or 2, or by the first control unit 414 or 514 in the power supply device 41 or 51 of the wired charging system 4 or 5, after obtaining the battery's current actual capacity.

[0203] In addition, the above operation can also be performed by the second control module 135 in the device 13 to be charged in the wireless charging system 1 or 2, or by the charging integrated circuit 323 in the device 32 to be charged in the wired charging system 3, or by the second control unit 423 or 523 in the device 42 or 52 to be charged in the wired charging system 4 or 5, after obtaining the current actual capacity of the battery.

[0204] Determining the cutoff current of the battery during the constant-voltage charging phase includes increasing the cutoff current as the current actual capacity of the battery decreases. In some embodiments, the current actual capacity of the battery can be input into a cutoff current determination model established through large-scale data learning. This cutoff current determination model can be, for example, a table relating battery capacity to cutoff current, obtained through statistical learning from a large amount of experimental data. Based on the current actual capacity in this table, the new cutoff current corresponding to the current actual capacity of the battery can be quickly retrieved. Alternatively, the cutoff current determination model can also be a training model based on an artificial neural network, trained on a large amount of experimental data. This model takes battery capacity as input and cutoff current as output, allowing the current actual capacity to be input into the trained model to obtain the cutoff current output by the model, and determining this cutoff current as the new cutoff current for the battery during the constant-voltage charging phase.

[0205] In step S204, the constant voltage charging process is stopped when the battery charging current drops to the determined cutoff current during the constant voltage charging phase.

[0206] For example, when the cutoff current is determined by the first control module 122 in the wireless charging device 12 or 22 of the wireless charging system 1 or 2, the first control module 122 can control the end of the constant voltage charging process based on the determined cutoff current. When the cutoff current is determined by the second control module 135 in the device to be charged 13 of the wireless charging system 1 or 2, the second control module 135 can feed back the cutoff current to the first control module 122, so that the first control module 122 can control the end of the constant voltage charging process based on the determined cutoff current. That is, the operation of obtaining the current battery level and determining the cutoff current of the battery during the constant voltage charging stage can be performed in the wireless charging device 12 or 22; or, it can be performed in the device to be charged 13. If performed in the device to be charged 13, the determined cutoff current can be fed back to the wireless charging device 12 or 22, so that it can control the end of the constant voltage charging process based on the determined cutoff current.

[0207] When the cutoff current is determined by the first control unit 414 or 514 in the power supply device 41 or 51 of the wired charging system 4 or 5, the first control unit 414 or 514 can control the end of the constant voltage charging process based on the determined cutoff current. However, when the cutoff current is determined by the second control unit 423 or 523 in the device to be charged 42 or 52, the second control unit 423 or 523 also needs to feed back the cutoff current to the first control unit 414 or 514 so that the first control unit 414 or 514 can control the end of the constant voltage charging process based on the determined cutoff current. That is, the operation of obtaining the current battery charge and determining the cutoff current of the battery during the constant voltage charging stage can be performed in the power supply device 41 or 51; or, it can be performed in the device to be charged 42 or 52. If performed in the device to be charged 42 or 52, the determined cutoff current can be fed back to the power supply device 41 or 51 so that it can control the end of the constant voltage charging process based on the determined cutoff current.

[0208] According to another battery charging method provided in this disclosure, the cutoff current of the battery during the constant voltage charging stage is further adjusted according to the actual capacity of the battery, thereby further slowing down the aging and degradation rate of the battery and improving the battery's service life.

[0209] Furthermore, the battery charging method 10 or 20 described above can also be applied to the segmented constant current charging process. Based on the current actual capacity of the battery, the charging current for each of the M constant current stages is determined. The specific determination method can be as described above. Those skilled in the art will understand that when determining the charging current based on a charging current determination model, different constant current stages can have different charging current determination models, such as the first charging current determination model, the second charging current determination model, ..., the Mth charging current determination model.

[0210] Furthermore, the battery charging methods 10 or 20 described above can also be applied to stepped charging. In stepped charging, the charging process can be divided into multiple constant current charging stages and multiple constant voltage charging stages. For example, in the first constant current charging stage, the battery is charged with a first constant charging current; when the battery voltage rises to a first cutoff voltage, the charging process enters the first constant voltage charging stage, charging the battery with a first constant voltage; during the first constant voltage charging process, when the battery charging current drops to the first cutoff current, the second constant current charging stage is entered, charging the battery with a second constant charging current; when the battery voltage rises to the second cutoff voltage, the charging process enters the second constant voltage charging stage, charging the battery with a second constant voltage; during the second constant voltage charging process, when the battery charging current drops to the second cutoff current, the third constant current charging stage is entered; and so on.

[0211] When applying the battery charging method 10 or 20 described above to a stepped charging method, the charging current for different constant current charging stages and the cutoff current for different constant voltage charging stages can be adjusted according to the actual battery capacity. Similarly, those skilled in the art should understand that when using a charging current determination model to determine the charging current, different charging current determination models can correspond to different constant current charging stages. Similarly, when using a cutoff current determination model to determine the cutoff current, different cutoff current determination models can correspond to different constant voltage charging stages.

[0212] Those skilled in the art should understand that the wireless charging systems 1 and 2 and the wired charging systems 3-5 described above are merely application examples of battery charging method 10 or 20, and are not intended to limit the battery charging method of this disclosure. That is, the battery charging method 10 or 20 of this disclosure can also be applied to other systems. The measurement of the actual battery capacity is not limited to the measurement using a fuel gauge as described above. Since the battery capacity read after each charging process is obtained at a specific rate (e.g., 3C), this rate is generally quite high, and therefore the capacity value at this rate may be less than the actual capacity. However, the initial factory-calibrated rated capacity for each test is usually obtained using a 0.2C charge / discharge test, and the data obtained at a higher rate may not match the actual situation. Therefore, when measuring the current actual capacity of the battery, the actual battery capacity can be measured at a lower rate (e.g., 0.2C) to obtain a more accurate actual battery capacity.

[0213] Furthermore, it should be noted that the above figures are merely illustrative representations of the processes included in the methods according to exemplary embodiments of this disclosure, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0214] The following are embodiments of the apparatus disclosed herein, which can be used to execute embodiments of the method disclosed herein. For details not disclosed in the apparatus embodiments of this disclosure, please refer to the embodiments of the method disclosed herein.

[0215] Figure 8 This is a block diagram illustrating a battery charging device according to an exemplary embodiment.

[0216] refer to Figure 8 The battery charging device 30 includes a battery capacity acquisition module 302 and a charging current determination module 304.

[0217] Among them, the battery capacity acquisition module 302 is used to acquire the current actual capacity of the battery.

[0218] The charging current determination module 304 is used to determine the charging current of the battery during the constant current charging stage based on the current actual capacity of the battery.

[0219] In some embodiments, the battery charging device 30 further includes a constant current charging control module 306, which controls the battery to be charged by the determined charging current during the constant current charging phase.

[0220] In some embodiments, the charging current determination module 304 includes: a first charging current determination unit, configured to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging phase during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging was completed or before the previous charging.

[0221] In some embodiments, the charging current determination module 304 further includes: a second charging current determination unit, configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

[0222] In some embodiments, the charging current determination module 304 includes: a third charging current determination unit, configured to input the current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein the charging current determination model is a model established based on big data learning.

[0223] In some embodiments, the battery charging device 30 further includes a cutoff current determination module, configured to determine the cutoff current of the battery during the constant voltage charging phase based on the current actual capacity of the battery.

[0224] In some embodiments, the cutoff current determination module includes: a first cutoff current determination unit, configured to input the current actual capacity of the battery into a cutoff current determination model, so as to output the cutoff current according to the cutoff current determination model; wherein, the cutoff current determination model is a model established based on big data learning.

[0225] In some embodiments, the battery charging device 30 further includes a constant voltage charging control module, used to control the constant voltage charging process to stop when the charging current of the battery drops to the cutoff current during the constant voltage charging phase.

[0226] In some embodiments, the charging current determination module 304 includes: a fourth charging current determination unit, configured to determine the charging current of the battery at different constant current charging stages based on the current actual capacity of the battery.

[0227] In some embodiments, the cutoff current determination module includes: a second cutoff current determination unit, configured to determine the cutoff current of the battery at different constant voltage charging stages based on the current actual capacity of the battery.

[0228] According to the battery charging device provided in this disclosure, by continuously measuring the battery capacity, the current actual capacity of the battery can be obtained, and the charging current of its constant current charging stage can be continuously adjusted according to the actual capacity, thereby slowing down the aging and degradation rate of the battery to the greatest extent and improving the battery's service life.

[0229] It should be noted that the block diagrams shown in the above figures are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0230] Figure 9 This is a schematic diagram illustrating a computer-readable storage medium according to an exemplary embodiment.

[0231] refer to Figure 9 As shown, a program product 900 configured to implement the above-described method according to an embodiment of the present disclosure is described. This product may employ a portable compact disc read-only memory (CD-ROM) and include program code, and may run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto. In this document, the readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0232] The aforementioned computer-readable medium carries one or more programs, which, when executed by a device, cause the computer-readable medium to perform the functions described above. Figure 6 or Figure 7 The battery charging method shown.

[0233] Exemplary embodiments of this disclosure have been specifically illustrated and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementation methods described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A battery charging method, characterized in that, include: Get the current actual capacity of the battery; Based on the current actual capacity of the battery, the charging current of the battery in the constant current charging stage is determined. The constant current charging stage includes M constant current stages, and the charging current of the battery in the constant current charging stage includes the charging current corresponding to each of the M constant current stages; where M is an integer greater than or equal to 2. The current actual capacity of the battery is input into multiple cutoff current determination models corresponding to the constant voltage charging stages, so as to output the cutoff current corresponding to each constant voltage charging stage according to each cutoff current determination model; wherein, each cutoff current determination model is a model established based on big data learning. Determining the charging current of the battery during the constant current charging phase based on the battery's current actual capacity includes: The current actual capacity of the battery is input into the charging current determination model corresponding to each constant current stage, and the calculation coefficients corresponding to each constant current stage are output by each charging current determination model. The charging current for each constant current stage is obtained by multiplying the calculated coefficients corresponding to each constant current stage with the current actual capacity. The method further includes: In the i-th constant current stage, the battery is charged with the charging current of the i-th constant current stage; where i is a positive integer less than or equal to M-1. When the voltage of the battery rises to the cutoff voltage corresponding to the i-th constant voltage charging stage, the i-th constant voltage charging stage is entered. In the i-th constant voltage charging stage, the battery is controlled to be charged with a constant voltage corresponding to the i-th constant voltage charging stage; When the charging current of the battery drops to the cutoff current of the i-th constant voltage charging stage, it enters the (i+1)-th constant current stage.

2. The method according to claim 1, characterized in that, Based on the current actual capacity of the battery, the charging current of the battery during the constant current charging phase is determined as follows: When the current actual capacity of the battery is less than the actual capacity measured after the previous charge or before the previous charge, the charging current is calculated based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charge.

3. The method according to claim 2, characterized in that, Determining the charging current of the battery during the constant current charging phase, based on the battery's current actual capacity, further includes: When the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charge or before the previous charge, the charging current is determined to be the charging current of the battery during the constant current charging phase of the previous charge.

4. The method according to claim 1, characterized in that, The charging current determination model is a model established based on big data learning.

5. A battery charging device, characterized in that, include: The battery capacity acquisition module is used to obtain the current actual capacity of the battery. as well as The charging current determination module is used to input the current actual capacity of the battery into the charging current determination model corresponding to M constant current stages, obtain the calculation coefficients corresponding to each constant current stage output by each charging current determination model, and obtain the charging current of each constant current stage by multiplying the calculation coefficients corresponding to each constant current stage with the current actual capacity; where M is an integer greater than or equal to 2. The second cutoff current determination unit is used to input the current actual capacity of the battery into multiple cutoff current determination models corresponding to constant voltage charging stages, so as to output the cutoff current corresponding to each constant voltage charging stage according to each cutoff current determination model; wherein, each cutoff current determination model is a model established based on big data learning. The charging current determination module is further configured to control the charging current of the i-th constant current stage to charge the battery during the i-th constant current stage; when the battery voltage rises to the cutoff voltage corresponding to the i-th constant voltage charging stage, the battery enters the i-th constant voltage charging stage; during the i-th constant voltage charging stage, the battery is controlled to be charged with the constant voltage corresponding to the i-th constant voltage charging stage; when the battery charging current drops to the cutoff current of the i-th constant voltage charging stage, the battery enters the (i+1)-th constant current stage; where i is a positive integer less than or equal to M-1.

6. A device to be charged, characterized in that, include: Battery and control module; The control module is used to obtain the current actual capacity of the battery, and input the current actual capacity of the battery into the charging current determination model corresponding to M constant current stages respectively, to obtain the calculation coefficients corresponding to each constant current stage output by each charging current determination model, and to obtain the charging current of each constant current stage by multiplying the calculation coefficients corresponding to each constant current stage with the current actual capacity; wherein M is an integer greater than or equal to 2. The control module is further configured to input the current actual capacity of the battery into multiple cutoff current determination models corresponding to constant voltage charging stages, so as to output the cutoff current corresponding to each constant voltage charging stage according to each cutoff current determination model; wherein, each cutoff current determination model is a model established based on big data learning. The control module is further configured to control the charging current of the i-th constant current stage to charge the battery during the i-th constant current stage; when the battery voltage rises to the cutoff voltage corresponding to the i-th constant voltage charging stage, the module enters the i-th constant voltage charging stage; during the i-th constant voltage charging stage, the module controls the charging current of the battery to be constant at the constant voltage corresponding to the i-th constant voltage charging stage; when the battery charging current drops to the cutoff current of the i-th constant voltage charging stage, the module enters the (i+1)-th constant current stage; where i is a positive integer less than or equal to M-1.

7. The device to be charged according to claim 6, characterized in that, The control module is also used to provide the determined charging current to the wireless charging device or the power supply device.

8. The device to be charged according to any one of claims 6-7, characterized in that, The control module is used to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging or before the previous charging.

9. The device to be charged according to claim 8, characterized in that, The control module is further configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

10. The device to be charged according to any one of claims 6-7, characterized in that, in, The charging current determination model is a model established based on big data learning.

11. The device to be charged according to claim 6, characterized in that, The control module is also used to provide the determined cutoff current to the wireless charging device or power supply device.

12. A wireless charging device, characterized in that, include: The control module is used to obtain the current actual capacity of the battery, and input the current actual capacity of the battery into the charging current determination model corresponding to M constant current stages respectively, obtain the calculation coefficients corresponding to each constant current stage output by each charging current determination model, and obtain the charging current of each constant current stage by multiplying the calculation coefficients corresponding to each constant current stage with the current actual capacity; where M is an integer greater than or equal to 2. The control module is further configured to input the current actual capacity of the battery into multiple cutoff current determination models corresponding to constant voltage charging stages, so as to output the cutoff current corresponding to each constant voltage charging stage according to each cutoff current determination model; wherein, each cutoff current determination model is a model established based on big data learning. The control module is further configured to control the charging current of the i-th constant current stage to charge the battery during the i-th constant current stage; when the battery voltage rises to the cutoff voltage corresponding to the i-th constant voltage charging stage, the module enters the i-th constant voltage charging stage; during the i-th constant voltage charging stage, the module controls the charging current of the battery to be constant at the constant voltage corresponding to the i-th constant voltage charging stage; when the battery charging current drops to the cutoff current of the i-th constant voltage charging stage, the module enters the (i+1)-th constant current stage; where i is a positive integer less than or equal to M-1.

13. The wireless charging device according to claim 12, characterized in that, The control module is used to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging or before the previous charging.

14. The wireless charging device according to claim 13, characterized in that, The control module is further configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

15. The wireless charging device according to claim 13, characterized in that, The control module is used to input the current actual capacity of the battery into a charging current determination model, so as to output the charging current according to the charging current determination model; wherein, the charging current determination model is a model established based on big data learning.

16. A power supply device, characterized in that, include: The control module is used to obtain the current actual capacity of the battery, and input the current actual capacity of the battery into the charging current determination model corresponding to M constant current stages respectively, obtain the calculation coefficients corresponding to each constant current stage output by each charging current determination model, and obtain the charging current of each constant current stage by multiplying the calculation coefficients corresponding to each constant current stage with the current actual capacity; where M is an integer greater than or equal to 2. The control module is further configured to input the current actual capacity of the battery into multiple cutoff current determination models corresponding to constant voltage charging stages, so as to output the cutoff current corresponding to each constant voltage charging stage according to each cutoff current determination model; wherein, each cutoff current determination model is a model established based on big data learning. The control module is further configured to control the charging current of the i-th constant current stage to charge the battery during the i-th constant current stage; when the battery voltage rises to the cutoff voltage corresponding to the i-th constant voltage charging stage, the module enters the i-th constant voltage charging stage; during the i-th constant voltage charging stage, the module controls the charging current of the battery to be constant at the constant voltage corresponding to the i-th constant voltage charging stage; when the battery charging current drops to the cutoff current of the i-th constant voltage charging stage, the module enters the (i+1)-th constant current stage; where i is a positive integer less than or equal to M-1.

17. The power supply device according to claim 16, characterized in that, The control module is used to calculate the charging current based on the current actual capacity of the battery and the same rate used in the constant current charging stage during the previous charging process when the current actual capacity of the battery is less than the actual capacity measured after the previous charging or before the previous charging.

18. The power supply device according to claim 17, characterized in that, The control module is further configured to determine the charging current as the charging current of the battery during the constant current charging phase of the previous charging process when the current actual capacity of the battery is greater than or equal to the actual capacity measured after the previous charging was completed or before the previous charging.

19. The power supply device according to claim 16, characterized in that, The charging current determination model is a model established based on big data learning.

20. A computer-readable storage medium having computer-executable instructions stored thereon, characterized in that, When the executable instructions are executed by the processor, they implement the method as described in any one of claims 1-4.

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