Charger with quick-release charging head, control method and system thereof and medium

Abstract

The invention relates to a power bank with a quick-release charging head and a control method and system thereof, and a medium, and relates to the technical field of power bank charging, and the method comprises the steps: responding to a connection signal of a communication contact, and obtaining the current information of the charging head based on the communication connection between the communication contact and the charging head; a detection current is transmitted to the charging head through the contact group; obtaining the return current of the detection current, and determining the conduction impedance of the contact group according to the return current; determining a contact butt-joint state according to the conduction impedance, wherein the contact butt-joint state comprises a butt-joint state and a non-butt-joint state; generating a charging signal according to the current information and executing a charging operation under the condition that the contact butt joint state is a butt joint state; and generating a power-off signal according to the current information under the condition that the contact butt joint state is non-butt joint. The portable power bank has the advantages that the portable power bank can be conveniently charged, and the portability of the portable power bank is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power bank charging, and in particular to a power bank control method and system with a quick-release charging head, a terminal, and a medium. BACKGROUND

[0002] At present, portable charging devices (commonly known as power banks) have been widely used in emergency power supply scenarios of mobile terminals.

[0003] In related technologies, the power bank usually adopts a fixed input interface and output interface structure, that is, it is charged through a cable connected to an external charger, and then provides power to external electronic devices through a USB or Type-C interface.

[0004] In view of the related technologies in the above, in the case that the power of the power bank is low, it is usually necessary to find a charging head and a charging cable to charge the power bank. The separation structure of the charging head, the charging cable, and the power bank not only is cumbersome to carry, but also has a high probability of being lost in daily life. SUMMARY

[0005] In order to facilitate charging of the power bank and improve the portability of the power bank, the present application provides a power bank control method and system with a quick-release charging head, a terminal, and a medium.

[0006] In a first aspect, the present application provides a power bank control method with a quick-release charging head, which adopts the following technical solution: A power bank control method with a quick-release charging head, comprising: In response to a connection signal of a communication contact, obtaining current information of a charging head based on a communication connection established between the communication contact and the charging head; Delivering a detection current to the charging head through a contact group; Obtaining a backhaul current of the detection current, and determining a conduction impedance of the contact group according to the backhaul current; Determining a contact docking state according to the conduction impedance, the contact docking state including docked and undocked; In the case that the contact docking state is docked, generating a charging signal according to the current information and performing a charging operation; In the case that the contact docking state is undocked, generating a power-off signal according to the current information.

[0007] By adopting the technical scheme, the contact conduction state between the charging head and the power bank can be detected in real time, the conduction impedance of the contact group is determined according to the backhaul characteristics of the detection current, and thus the connected state and the unconnected state can be accurately distinguished; in the unconnected state, the power is automatically turned off, the problems of sparking, overheating and mischarging caused by poor contact are effectively avoided, the safe and stable connection of the quick-release interface is realized, and the quick-release charging head facilitates the charging of the power bank and improves the portability of the power bank.

[0008] Optionally, during the execution of the charging operation, the conduction impedance of the contact group is detected in a preset detection period, and an impedance change curve is generated according to the conduction impedance; The contact impedance change rate is calculated according to the impedance change curve; The impedance change rate is fitted with a historical change rate curve in a historical charging period to obtain a contact performance trend model; The future conduction impedance within a preset time threshold is obtained according to the contact performance trend model; The duration that the future conduction impedance is greater than the conduction threshold is obtained; The power reduction control signal is generated according to the duration; In response to the power reduction control signal, the charging head enters a power limiting mode.

[0009] By adopting the technical scheme, the change of the contact conduction impedance can be monitored in real time during the charging process, and a contact performance trend model is generated, the power reduction control is triggered in advance according to the predicted future conduction impedance, the early warning and protection of contact aging or poor contact are realized, the overheating and loss under high power are effectively avoided, and the charging stability and the service life of the contact group are improved.

[0010] Optionally, whether the charging head has an external output current is determined according to the current information; If yes, the external power corresponding to the external output current and the maximum demand power corresponding to the charging device are obtained; Whether the sum of the internal power and the maximum demand power is greater than the rated charging power of the charging head is determined, the internal power refers to the power of the charging head when charging the power bank; If yes, the estimated full charging time of the power bank based on the internal power is obtained; In the case that the estimated full charging time is less than a preset duration, the charging head is controlled to keep the current internal power to charge the power bank until the estimated full charging time is reached; In the case that the estimated full charging time is not less than a preset first duration, the power of the charging head is adjusted so that the external power approaches the maximum demand power, and the target external power is obtained.

[0011] By adopting the technical scheme, the internal and external power supply states of the charging head can be dynamically judged according to the current information, and the output power is automatically adjusted in combination with the charging time of the power bank and the maximum demand power of the external equipment, so that intelligent distribution and preferential power supply of power resources are realized, the overall charging efficiency is effectively improved, and power overload is avoided.

[0012] Optionally, it is judged whether the maximum demand power is greater than the target external power. If yes, the compensation power of the power bank is obtained based on the maximum demand power and the rated power. According to the compensation power, the indirect power supply operation is performed on the charging equipment, that is, the power supply operation is performed on the charging head, and then the power supply operation is performed on the charging equipment through the charging head.

[0013] By adopting the technical scheme, when the maximum demand power of the charging equipment exceeds the output capacity of the charging head, the compensation power of the power bank can be calculated according to the maximum demand probability and the rated probability, and the indirect power supply operation is performed, so that the power bank and the charging head supply power to the charging equipment at the same time, thereby improving the charging speed of the charging equipment.

[0014] Optionally, the charging phase of the charging equipment is obtained in real time. When the charging phase reaches the preset slow charging phase, the slow charging power of the charging equipment in the preset slow charging phase is obtained, and the compensation power is calculated according to the slow charging power and the rated charging power. The charging head is controlled to charge the charging equipment using the slow charging power and charge the power bank using the compensation power.

[0015] By adopting the technical scheme, the power can be dynamically distributed according to the charging phase of the external equipment. When entering the slow charging phase, the slow charging power is used to continue to supply power to the equipment, and the remaining power is used to compensate the power bank, thereby improving the overall energy utilization rate.

[0016] Optionally, the voltage signal and the current signal of the power supply input end are collected in real time. The power supply fluctuation index is calculated according to the voltage signal and the current signal. The target period in which the power supply fluctuation index exceeds the preset stability threshold is obtained. It is judged whether the target period is greater than the preset duration. If yes, the charging head is controlled to disconnect the power supply path of the charging equipment. The power bank is controlled to perform the indirect power supply operation on the charging equipment.

[0017] By adopting the above technical solution, the voltage and current changes at the power input terminal can be monitored in real time, the power fluctuation index can be calculated, and the duration of the fluctuation can be determined. When the power fluctuation index exceeds the preset stability threshold and the duration exceeds the preset duration, the direct power supply path of the charging head is automatically disconnected, and the power is switched to indirect power supply from the power bank, thereby avoiding the impact of abnormal power supply on the charging equipment and realizing the continuity and safety of the charging process.

[0018] Optionally, when the power fluctuation index is less than the first threshold and greater than the second threshold, the charging head is controlled to resume charging the power bank, and the indirect power supply operation from the power bank to the charging device is maintained. When the power fluctuation index is less than the second threshold and greater than the third threshold, the internal power and external power are adjusted according to the power fluctuation index to obtain the optimized internal power and optimized external power, wherein the optimized internal power is greater than the optimized external power; the charging head is controlled to use the optimized internal power to charge the power bank and the optimized external power to charge the charging device, and the indirect power supply operation from the power bank to the charging device is maintained. When the power fluctuation index is less than the third threshold and greater than the preset stability threshold, the power reduction ratio is calculated based on the difference between the power fluctuation index and the preset stability threshold. The rated charging power of the charger is reduced based on the power reduction ratio, and the target external power is used to charge the charging device.

[0019] By adopting the above technical solution, the charging and discharging strategy can be adjusted in stages according to the power fluctuation index: when the power fluctuation index is less than the first threshold but greater than the second threshold, power is restored to the power bank, and the power bank is used to indirectly power the charging device to reduce the adverse effects of power fluctuations on the charging device; when the power fluctuation index is less than the second threshold but greater than the third threshold, internal and external power are allocated, and the charging device is charged at a low power through the charging head, while the power bank is still used to indirectly power the charging device. On the one hand, this increases the charging power to the charging device, and on the other hand, it reduces the adverse effects of power fluctuations on the charging device; when the power fluctuation index is less than the third threshold but greater than the preset stability threshold, power derating control is executed to prevent the power from fluctuating again due to full power recovery, thus achieving a stable power transition and smooth system recovery.

[0020] Secondly, this application provides a power bank control system with a quick-release charging head, which adopts the following technical solution: A power bank control system with a quick-release charging head includes: The acquisition module is used to acquire current information; A memory for storing the program of the power bank control method with a quick-release charging head; The processor can load and execute the program in the memory to implement the method for controlling the power bank with the quick-release charging head.

[0021] By adopting the technical solution, the contact conduction state between the charging head and the power bank can be detected in real time, the conduction impedance of the contact group is determined according to the return characteristics of the detection current, and the connected state and the unconnected state can be accurately distinguished; in the unconnected state, power is automatically turned off, the problems of sparking, overheating and mischarging caused by poor contact are effectively avoided, the safe and stable connection of the quick-release interface is realized, the charging head is convenient for charging the power bank, and the portability of the power bank is improved.

[0022] In a third aspect, the application provides a power bank with a quick-release charging head, which adopts the following technical solution: a power bank with a quick-release charging head includes a memory and a processor, and the memory stores a computer program that can be loaded and executed by the processor to implement the method described in any one of the above.

[0023] In a fourth aspect, the application provides a computer storage medium that can store a corresponding program, has the characteristics of facilitating the charging of the power bank and improving the portability of the power bank, and adopts the following technical solution: A computer readable storage medium stores a computer program that can be loaded and executed by the processor to implement any of the above methods for controlling the power bank with the quick-release charging head.

[0024] In summary, the application has at least the following beneficial technical effects: 1. The contact conduction state between the charging head and the power bank can be detected in real time, the conduction impedance of the contact group is determined according to the return characteristics of the detection current, and the connected state and the unconnected state can be accurately distinguished; in the unconnected state, power is automatically turned off, the problems of sparking, overheating and mischarging caused by poor contact are effectively avoided, the safe and stable connection of the quick-release interface is realized, the charging head is convenient for charging the power bank, and the portability of the power bank is improved; 2. When the maximum demand power of the charging device exceeds the output capacity of the charging head, the compensation power of the power bank can be calculated according to the maximum demand probability and the rated probability, and the indirect power supply operation is performed, so that the power bank and the charging head supply power to the charging device at the same time, to improve the charging speed of the charging device; 3. The voltage and current changes of the power supply input end can be monitored in real time, the power supply fluctuation index is calculated and the fluctuation duration is judged; when the power supply fluctuation index exceeds the preset stability threshold and the duration exceeds the preset duration, the direct supply path of the charging head is automatically disconnected, and the indirect power supply by the power bank is switched, so that the impact of abnormal power supply on the charging device is avoided, and the continuity and safety of the charging process are realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a flowchart of a power bank control method with a quick-release charging head in an embodiment of the present application.

[0026] Figure 2 is a flowchart of a charging safety detection method in an embodiment of the present application.

[0027] Figure 3 is a flowchart of a double-end charging method in an embodiment of the present application.

[0028] Figure 4 is a flowchart of a cooperative charging method in an embodiment of the present application.

[0029] Figure 5 is a flowchart of a stage power compensation method in an embodiment of the present application.

[0030] Figure 6 is a flowchart of a power supply switching method in an embodiment of the present application.

[0031] Figure 7 is a flowchart of a stage charging method in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, the following will combine with the drawings of the present application to further describe the present application in detail. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. Figure 1 - the drawings Figure 7 and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0033] The embodiment of the present application discloses a power bank control method with a quick-release charging head. Referring to Figure 1 , the power bank control method with a quick-release charging head comprises: Step S101: in response to the connection signal of the communication contact, based on the communication connection established by the communication contact and the charging head, the current information of the charging head is acquired.

[0034] The communication contact refers to the conductive contact point arranged at the power bank end, which is used to realize electrical connection and signal transmission with the corresponding contact point on the charging head. Among them, the power bank is provided with a quick-release interface for the charging head to insert, when the charging head is inserted into the quick-release interface, the corresponding contact point and the communication contact realize physical contact.

[0035] The connection signal refers to the level change signal generated after the communication contact and the counter contact are in contact, wherein, in the standby state of the power bank, a very low amplitude detection current (for example, several microamperes to several tens of microamperes) is periodically output and sent out through the detection branch of the communication contact. At this time, because the charging head is not connected, the detection current has almost no backflow in the open circuit state, and the detection voltage remains in the high impedance state. At this time, no level change signal is generated, that is, no connection signal is generated. When the user inserts the charging head into the quick release structure, the counter contact and the communication contact are in contact to form a closed loop, the detection current obtains a backflow path, and the voltage at the detection end changes (for example, from high impedance to low level or stable current waveform). This voltage change is detected by the ADC or comparator of the control module in the power bank, that is, it is determined as a "connection event", thereby generating a connection signal. Further, after detecting the connection signal, the control module further sends a handshake current pulse or a digital signal to confirm the contact stability. If the detection result is stable and lasts more than a preset time (such as 10 ms), it is considered that the connection is successful, and the communication connection is established.

[0036] The current information refers to the real-time output current parameters of the charging head, including whether the power source is connected, the current value, the change rate, and the flow direction identifier. When the charging head and the power bank establish a communication connection, the control module of the power bank reads the current information of the charging head through the communication connection, so as to judge whether the charging head is currently in the internal charging or external power supply state. Among them, whether the power source is connected is used to judge whether the charging head is inserted into the power source.

[0037] Step S102: transmitting a detection current to the charging head through the contact group.

[0038] The contact group refers to a quick release electrical connection structure composed of a plurality of independent conductive contacts. Among them, the contact group includes a first contact group arranged on the power bank and a second contact group arranged on the charging head. When the charging head is inserted into the quick release interface, the first contact group and the second contact group are in contact to form a counter state.

[0039] The detection current refers to a low-amplitude current signal output by the power bank and the charging head after establishing a communication connection, for judging the conduction state of the contact group. The detection current is usually in the order of milliamperes or microamperes, and its amplitude is much smaller than the normal working current, which will not have a substantial charging effect on the charging head.

[0040] After the communication connection between the power bank and the charging head is established, the detection current is injected to the charging head side through the positive and negative output ports of the first contact group and the second contact group, to test the conduction of the contact group. After the detection current forms a closed loop at the charging head end, its backflow current will be transmitted back to the control module of the power bank. The control module calculates the contact conduction impedance according to the output amplitude, backflow current and voltage change of the detection current, to provide basic data for subsequent judgment of the contact counter state (whether stable contact).

[0041] Step S103: Obtain the backhaul current of the detection current, and determine the on-resistance of the contact group according to the backhaul current.

[0042] The backhaul current refers to the current of the detection current returning to the power bank via the internal loop of the charging head.

[0043] The on-resistance refers to the impedance value in the charging path for charging the power bank based on the first contact group and the second contact group. After the detection current is output to the charging head through the first contact group and the second contact group, the voltage signal of the detection current in the backhaul path is collected, the backhaul voltage is compared with the known detection current value, and the on-resistance of the contact group is calculated according to Ohm's law.

[0044] Step S104: Determine the contact docking state according to the on-resistance, and the contact docking state includes docked and undocked.

[0045] The contact docking state refers to the contact condition of the first contact group at the power bank end and the second contact group at the charging head end in the physical and electrical aspects. The docking state is used to determine whether the two ends form a stable conduction.

[0046] Docked indicates that the contact between the contact groups is firm, the on-resistance is low, and the power and signal can be normally transmitted. Undocked indicates that the contact between the contact groups is poor or in a separated state, the on-resistance is high, and the current cannot be stably transmitted.

[0047] After obtaining the on-resistance, the on-resistance is compared with the preset on-resistance threshold. In the case that the on-resistance is greater than the preset on-resistance threshold, it indicates that there may be problems such as loose contact, contamination or oxidation between the first contact group and the second contact group, so that the contact between the first contact group and the second contact group is poor or in a separated state. At this time, it is determined that the contact docking state is undocked. In the case that the on-resistance is not greater than the preset on-resistance threshold, it indicates that the power and signal can be normally transmitted. At this time, it is determined that the contact docking state is docked.

[0048] Step S105: In the case that the contact docking state is docked, generate a charging signal according to the current information and perform a charging operation.

[0049] The charging signal refers to a control instruction signal generated according to the current information, which is used to trigger the power bank to output energy to the charging head.

[0050] When the connection status is "connected," the charger determines whether it is currently connected to a power source based on the "connected to power" information in the charger's current data. If the charger is connected, the power bank generates a charging signal and sends this signal to the charger via communication contacts. Upon receiving the signal, the charger initiates charging based on the charging path established between the first and second contact groups. The charging path refers to the electrical energy transmission path formed by the conductive connection between the first and second contact groups.

[0051] Step S106: If the contact connection is not connected, generate a power-off signal based on the current information.

[0052] When the contacts are not connected, the power bank determines whether the charger is connected to a power source based on the charger's current information. If no power is connected, a connection error is indicated by a flashing light on the power bank at a preset color and frequency. When the charger is connected to a power source, the power bank generates a power-off signal and sends it to the charger. Upon receiving this signal, the charger, after indicating a connection error, disconnects the charging path established between the first and second contact groups, thus performing a power-off operation.

[0053] This application provides a charging safety detection method, referring to... Figure 2 The method includes: Step S201: During the charging operation, the on-resistance of the contact group is detected after a preset detection cycle, and an impedance change curve is generated based on the on-resistance.

[0054] The preset detection cycle is a fixed constant that can be adjusted according to actual needs.

[0055] The impedance change curve is a trend curve of the change of conduction impedance data collected in multiple consecutive detection cycles plotted on a time axis. It is used to reflect the contact stability of the contact group.

[0056] Specifically, the conduction impedance is calculated based on the voltage and current within each preset detection cycle, and the conduction impedance at each moment is stored in a buffer. The conduction impedance data is then fitted using a time series to generate an impedance change curve.

[0057] Step S202: Calculate the contact impedance change rate based on the impedance change curve.

[0058] The contact impedance change rate refers to the rate of change of the conduction impedance of a contact group per unit time, reflecting the dynamic stability of the contact group's conduction performance. It can be calculated as the ratio of the difference in conduction impedance over adjacent preset detection cycles to the duration of the preset detection cycle. K = (Rn -R n-1 ) / (t n -t n-1 ) wherein, R n is the on-resistance of the current preset detection period t n , R n-1 is the on-resistance of the last preset detection period t n-1 , and K is the contact resistance change rate.

[0059] When the preset detection period is long or the data noise is large, a moving average or linear regression fitting method can be used to smooth the change rate to obtain the real impedance change trend.

[0060] Step S203: Fit the change rate with the historical change rate curve in the historical charging period to obtain a contact performance trend model.

[0061] The historical change rate curve refers to the curve data of the contact resistance change rate changing with time recorded in multiple historical charging periods, which is used to reflect the change rule of the contact group on-resistance performance in long-term use.

[0062] The contact performance trend model refers to a mathematical model obtained by fitting the contact resistance change rate of the current charging period with the historical change rate curve, which is used to predict the change trend of the contact group on-resistance performance in the future time period.

[0063] After obtaining the change rate of the current charging period, the current contact resistance change rate is fitted with the historical change rate curve stored in the historical charging period. The fitting algorithm can use linear regression, polynomial fitting, or exponential function fitting, etc. to determine the correlation degree between the current contact resistance change rate and the historical change rate curve. When the fitting degree is higher than a preset correlation threshold, the most matched historical change rate curve is taken as a reference sample to generate a corresponding contact performance trend model. The contact performance trend model is used to describe the change trend of the contact group on-resistance in the continuous charging process.

[0064] Step S204: Obtain the future on-resistance within a preset time threshold according to the contact performance trend model.

[0065] The preset time threshold is a preset constant, which can be adjusted according to actual needs.

[0066] The future on-resistance refers to the on-resistance value of the contact group within the preset time threshold predicted according to the contact performance trend model.

[0067] In a feasible implementation, time extrapolation calculation is performed according to the contact performance trend model. Assuming that the current conduction impedance is R0, the conduction impedance growth rate is k, and the preset time threshold is t, the future conduction impedance satisfies the relationship: R(t) = R0+k·t, where k is an average change rate constant fitted from the K values in multiple historical charging cycles.

[0068] Step S205: Obtain the duration that the future conduction impedance is greater than the conduction threshold.

[0069] The conduction threshold is a preset constant, which is an impedance critical value for distinguishing between the normal conduction state and the abnormal conduction state of the contact group. When the conduction impedance of the contact group exceeds the threshold, it is considered that the contact group has a risk of conduction failure.

[0070] The duration refers to the length of time during which the future conduction impedance is greater than the conduction threshold. If the future conduction impedance is not greater than the conduction threshold, the duration is 0.

[0071] When the future conduction impedance is greater than the conduction threshold, the starting and ending time points of the state on the prediction time axis are recorded; and the duration that the future conduction impedance is greater than the conduction threshold is calculated according to the difference between the two time points.

[0072] In a feasible implementation, the future conduction impedance function R(t) = R0+k·t output by the contact performance trend model is used, and the conduction threshold is set as R th When the model prediction curve intersects with the conduction threshold line, the intersection time point t1 is recorded, indicating that the conduction impedance of the contact group starts to exceed the conduction threshold; when the curve falls below the conduction threshold again, the time point t2 is recorded, indicating that the conduction impedance returns to normal. The duration T is t2-t1. Further, if the curve does not fall below the conduction threshold after a preset duration threshold, the duration is infinite.

[0073] Step S206: Generate a power reduction control signal according to the duration.

[0074] The power reduction control signal is a signal for controlling the charging head to enter a power limiting mode.

[0075] After the duration is calculated, the duration is compared with a preset safety duration threshold; when the duration is greater than the safety duration threshold, it is determined that the contact group has a risk of persistent conduction abnormality; in this case, the control module generates a power reduction control signal and sends a power reduction control information to the charging head to reduce the output power of the charging head to prevent the contact group from overheating or ablation due to high resistance state; wherein when the duration is close to the safety duration threshold, a mild level power reduction control signal is generated; when the duration is significantly greater than the safety duration threshold, a moderate level or severe level power reduction control signal is generated; the level of the power reduction control signal can be obtained by looking up the preset level-duration table.

[0076] When the duration is less than or equal to the safety duration threshold, the current power output mode is maintained and no power reduction instruction is triggered.

[0077] Step S207: In response to the power reduction control signal, the charging head enters a power limiting mode.

[0078] After receiving the power reduction control signal, the charging head controls the charging head to enter a power limiting mode to reduce the charging power of the power bank according to the power reduction control signal.

[0079] Further, by detecting the conduction impedance in real time, when the conduction impedance return value is less than the conduction safety threshold, the power bank generates a normal power control signal and sends the normal power control signal to the charging head to make the charging head return to the normal power mode to charge the power bank with normal power.

[0080] The embodiment of the application provides a double-end charging method, referring to Figure 3 The method comprises the following steps: Step S301: determining whether the charging head has an external output current according to current information.

[0081] The charging head is also provided with a charging interface for inserting a charging cable, and when a user inserts the charging cable into the charging interface and connects a charging device, the charging head can charge the charging device through the charging interface. When the charging head is plugged into the quick release interface of the power bank, the charging head charges the power bank through the contact group and charges the charging device connected through the charging cable through the charging interface. If the charging head is plugged into the quick release interface of the power bank, it can also directly charge the charging device through the charging cable.

[0082] The external output current refers to the current output by the charging head through the charging interface, i.e. the current when the charging head charges the charging device through the charging interface and the charging cable.

[0083] After the communication connection between the charging head and the power bank is established, whether the current flows to the external load charging device is determined according to the flow direction identifier in the current information of the charging head; if it is detected that the current direction is from the output end of the charging head to the external charging device, and the current value is greater than the preset output detection threshold, it is determined that the charging head has an output current to the outside; if the detection result shows that the output current is zero or less than the preset output detection threshold, it is determined that the current charging head does not supply power to the outside, and only performs internal charging or standby operation.

[0084] Step S302: If yes, the external output current corresponding to the external power and the maximum demand power corresponding to the charging device are obtained.

[0085] The external power refers to the actual output power of the charging head when the external output current is output, which is equal to the product of the output current and the output voltage, and is used to represent the external power supply capability of the charging head.

[0086] The maximum demand power refers to the maximum input power that the charging device can accept in the current charging stage, which is obtained by device type or charging protocol negotiation, and is used to reflect the upper limit of the power demand of the external device.

[0087] When the charging head has an output current to the outside, the control module of the charging head immediately reads the real-time voltage value and the output current value of the output end of the charging interface, and calculates the external power, and sends the external power to the control module of the power bank through the docking contact and the communication contact.

[0088] At the same time, the control module of the charging head obtains the maximum demand power declared by the charging device through the communication protocol (such as USB-PD or QC protocol) of the charging device, and sends the maximum demand power to the control module of the power bank through the docking contact and the communication contact.

[0089] Step S303: Determine whether the sum of the internal power and the maximum demand power is greater than the rated charging power of the charging head, the internal power refers to the power of the charging head when charging the power bank.

[0090] The internal power refers to the power of the charging head when charging the power bank, that is, the power of the charging head when charging the energy storage unit of the power bank body through the contact group, which is part of the internal energy distribution of the charging head. Among them, in the case that the power bank does not charge the charging device, the charging head can charge at the maximum demand power of the power bank and still has power redundancy.

[0091] The internal power can be obtained by the control module of the charging head, or by the control module of the power bank.

[0092] The sum of the internal power and the maximum demand power is obtained, and the sum is compared with the rated charging power. If the sum is not greater than the rated power, it indicates that the charging head can simultaneously meet the task of charging the power bank and the charging device at the maximum demand power. If the sum is greater than the rated charging power, it indicates that it is not possible to simultaneously meet the task of charging the power bank and the charging device at the maximum demand power, and step S304 is performed.

[0093] Step S304: If yes, the estimated full charging time of the power bank based on the internal power is obtained.

[0094] Estimated full charging time: refers to the time required for the power bank battery to reach a full charge state from the current remaining power state under the current internal power condition.

[0095] The control module of the power bank obtains the current power value, calculates the power difference value between the full power value according to the current power value, divides the power difference value by the internal power, and then divides by the charging efficiency to obtain the estimated full charging time. The charging efficiency refers to the ratio between the output power and the actual power absorbed by the power bank during the energy transfer process from the charging head to the power bank, and is used to represent the energy utilization rate of the energy transfer from the charging head to the energy storage unit. The charging efficiency can be calibrated at the factory for different power segments, temperature intervals, or contact states, so the charging efficiency can be obtained by looking up the charging efficiency table. Further, the charging efficiency can also be obtained by dividing the actual power received by the power bank by the internal power of the charging head.

[0096] Step S305: In the case where the estimated full charging time is less than the preset time length, the charging head maintains the current internal power to charge the power bank until the estimated full charging time is reached.

[0097] The preset time length is a preset constant, which can be adjusted according to actual needs.

[0098] In the case where the preset full charging time is less than the preset time length, it indicates that charging the power bank at the internal power from the current time makes the power bank full of power in a relatively short time, so there is no need to change the charging strategy of the charging head, and the charging head maintains the current internal power to charge the power bank until the estimated full charging time is reached. The power obtained by subtracting the rated power from the internal power is used to charge the charging device.

[0099] Step S306: In the case where the estimated full charging time is not less than the preset first time length, the power of the charging head is adjusted to make the external power approach the maximum demand power, and the target external power is obtained.

[0100] In the case that the estimated full charging time is not less than the preset first time length, it is indicated that the power bank cannot be fully charged in a short time. Therefore, the charging power of the charging head needs to be adjusted. Specifically, the power to the inside is reduced and the power to the outside is increased under the premise that the total output power does not exceed the rated charging power, so that the power to the outside gradually approaches the maximum demand power of the charging device, and the power to the outside at this time is the target power to the outside.

[0101] For example, the rated power of the charging head is 40w, the maximum demand power of the power bank is 16w, and the maximum demand power of the charging device is 30w. Before the power is adjusted, the charging power of the power bank is 16w, and the power allocated to the charging device is 24w. In the case that the estimated full charging time of the power bank is not less than the preset first time length, the charging power of the charging head is adjusted, so that the power to the outside is adjusted to 30w, and the target power to the outside is 30w, and the power to the inside is adjusted to 10w. Further, if the maximum demand power of the charging device is greater than the rated power, for example, 50w, the rated power is used to charge the charging device, and the charging of the power bank by the contact group is suspended.

[0102] The embodiment of the present application provides a cooperative charging method, referring to Figure 4 The method comprises the following steps. Step S401: determining whether the maximum demand power is greater than the target power to the outside.

[0103] Since the target power to the outside is obtained after the charging power of the charging head is adjusted, the maximum value of the target power to the outside is the rated charging power. If the maximum demand power is still greater than the target power to the outside, it indicates that the rated power cannot meet the maximum demand power of the charging device, and step S402 is performed. If the maximum demand power is equal to the target power to the outside, it indicates that the charging head can still charge the charging device at the maximum demand power. There is no case that the maximum demand power is greater than the target power to the outside.

[0104] In the case that the maximum demand power is greater than the target power to the outside, the charging head uses the rated power to supply power to the charging device.

[0105] Step S402: obtaining the compensation power of the power bank based on the maximum demand power and the rated power.

[0106] The compensation power is the additional power provided by the power storage unit of the power bank when the maximum demand power of the charging device exceeds the rated power of the charging head, which is used to make up the difference and indirectly supply power to the external device through the charging head.

[0107] The maximum power and the rated power are subtracted to obtain the compensation power of the power bank.

[0108] Step S403: Indirect power supply operation is performed to the charging device according to the compensation power. The indirect power supply operation refers to the operation of supplying power to the charging head, and then supplying power to the charging device through the charging head.

[0109] The indirect power supply operation refers to the operation of supplying power to the charging head by the power bank through the contact group, and then outputting the part of the electric energy to the charging device by the charging head.

[0110] After the compensation power is calculated, the indirect power supply mode is started. First, the power bank outputs energy to the contact group according to the compensation power value. The compensation energy enters the inside of the charging head through the contact group and is superimposed with the output power of the charging head itself. The total output power after superposition is uniformly output to the external charging device by the charging head, thereby realizing indirect power supply to the external device.

[0111] The embodiment of the present application provides a stage compensation power supply method, referring to Figure 5 The method comprises the following steps. Step S501: The charging stage of the charging device is acquired in real time.

[0112] The charging stage refers to the power state stage of the external charging device in the entire charging process. Different stages such as the fast charging stage, the constant voltage charging stage and the slow charging stage are usually included, and each stage corresponds to different power demand characteristics.

[0113] After the charging head and the external charging device are connected through the charging line, a communication connection is established between the charging line and the charging device, and a stage identification field in the charging protocol is periodically read. At the same time, the voltage and current information output by the charging head are collected, and the measured parameters are compared with the stage threshold values defined in the charging protocol. When the stage information returned by the protocol is consistent with the measured voltage and current characteristics, the actual charging stage of the charging device is confirmed.

[0114] In a feasible implementation manner, the control module of the charging head and the charging device communicate through the USB-PD charging protocol. The charging device periodically sends a message field containing the charging stage identification, for example, “CC” represents the constant current stage, “CV” represents the constant voltage stage, and “TR” represents the slow charging stage. The control module of the charging head detects that the voltage at the output end of the charging head is 9.1V and the current is 1.2A, and determines that the parameter combination corresponds to the slow charging stage according to the threshold interval in the charging protocol table. When the protocol message and the measured characteristics match, the control module of the charging head confirms that the current charging stage is the slow charging stage.

[0115] Step S502: When the charging stage reaches the preset slow charging stage, the slow charging power of the charging device in the preset slow charging stage is acquired.

[0116] The preset slow charging stage refers to a stage in which the power demand of the charging device is determined to be reduced according to the stage division and threshold configuration defined in the charging protocol.

[0117] In a feasible embodiment, when the charging device returns the message field of the charging head to "TR" according to the charging protocol, and the control module of the charging head detects that the output voltage of the charging head is 9.0 V and the current is 0.8 A, the slow charging power is calculated as follows: P slow = 9.0 V x 0.8 A = 7.2 W; the control module of the charging head takes 7.2 W as the slow charging power of the current stage, records it in the power buffer area, and sends the slow charging power data to the power bank through the docking contact and the communication contact.

[0118] Step S503: calculating the power compensation according to the slow charging power and the rated charging power.

[0119] The power compensation is required to reduce the charging power when the charging stage of the charging device reaches the preset slow charging stage, so that the charging head has remaining power that can be used to charge the power bank.

[0120] The rated charging power is subtracted from the slow charging power to obtain the power compensation.

[0121] Step S504: controlling the charging head to charge the charging device with the slow charging power and charge the power bank with the power compensation.

[0122] After obtaining the power compensation, the power bank sends the power compensation data to the control module of the charging head through the communication contact and the docking contact, and the control module of the charging head adjusts the charging power according to the power compensation, so that the charging device is charged with the slow charging power and the power bank is charged with the power compensation.

[0123] The embodiment of the application provides a power supply switching method, referring to Figure 6 The method comprises the following steps: Step S601: collecting the voltage signal and the current signal of the power input end in real time.

[0124] The power input end refers to the side interface of the charging head connected to the external power supply, which is the detection node of the external alternating current or direct current input.

[0125] The voltage signal is the voltage value detected by the voltage sensor at the power input end, and the current signal is the current value detected by the current sensor at the power input end.

[0126] After obtaining the voltage signal and the current signal, the control module of the charging head sends the voltage signal data and the current signal data to the control module of the power bank through the docking contact and the communication contact.

[0127] Step S602: Calculate the power fluctuation index according to the voltage signal and the current signal.

[0128] The power stability index refers to a quantitative parameter for characterizing the voltage and current fluctuation degree of the power supply within a set time window, and is used to reflect the stability of the power supply.

[0129] Among them, the voltage signal and the current signal are accompanied by a timestamp when obtained, and the voltage signal and the current signal within the set time window are extracted according to the timestamp, and the mean square error values of the voltage signal and the current signal are calculated respectively, which are used to quantify the fluctuation amplitude; the voltage fluctuation and the current fluctuation are weighted and fused to obtain a comprehensive fluctuation value; the power fluctuation index is calculated according to the comprehensive fluctuation value, wherein the larger the power stability index is, the greater the power fluctuation degree is.

[0130] In one feasible embodiment, the voltage fluctuation standard deviation σ V and the current fluctuation index σ I The calculation formula is respectively: Among them, Vi represents the voltage value corresponding to the voltage signal of the i-th sampling; represents the average value of the voltage value within the set time window; I i represents the current value corresponding to the current signal of the i-th sampling; represents the average value of the current value within the set time window; n represents the sampling number within the set time window.

[0131] The voltage fluctuation standard deviation and the current fluctuation index are fused to obtain the power fluctuation index S w = k1· σ V + k2· σ I . Among them, k1 is a preset voltage fluctuation weighting coefficient, k2 is a preset current fluctuation weighting coefficient, and k1+k2=1 is satisfied.

[0132] Step S603: Obtain the target period when the power fluctuation index exceeds the preset stability threshold.

[0133] The preset stability threshold refers to the upper limit of the power fluctuation allowed range preset, and when the power fluctuation index is greater than the threshold, it means that the power supply is in an abnormal fluctuation state.

[0134] The initial sampling time corresponding to the power fluctuation index exceeding the preset stable threshold is taken as the fluctuation start time, where the initial sampling time refers to the start time of the set time window corresponding to the power fluctuation index. By continuously detecting the power fluctuation index, when the initial sampling time corresponding to the power fluctuation index not greater than the preset stable threshold is detected as the fluctuation end time, the target period is obtained by subtracting the fluctuation end time from the fluctuation start time.

[0135] Step S604: Determine whether the target period is greater than the preset duration.

[0136] The preset duration is a preset constant, which can be adjusted according to actual needs.

[0137] Further, if the fluctuation start time is recorded, and after the preset duration, the power fluctuation index not greater than the preset stable threshold is still not detected, then it is directly determined that the target period is greater than the preset duration.

[0138] Step S605: If yes, control the charging head to disconnect the power supply path to the charging device.

[0139] The power supply path refers to the power transmission path of the power supply to the charging device through the charging head.

[0140] In the case where the target period is greater than the preset duration, the power bank sends a disconnection power supply instruction to the charging head through the signal contact and the docking contact, and the charging head disconnects the power supply path through the control module of the charging head after receiving the instruction, so that the power of the power supply is no longer transmitted to the charging device through the charging head.

[0141] In another aspect, if the target period is not greater than the preset duration, it is determined whether there is a case where the time interval between two adjacent target periods is less than a preset time interval; if there is, the sum of the two adjacent target periods is obtained, and it is determined whether the sum of the two adjacent target periods is greater than the preset duration; if greater, the step of controlling the charging head to disconnect the power supply path to the charging device is performed, and if not greater, no operation is performed. If there is no case where the time interval between two adjacent target periods is less than the preset time interval, no operation is performed, and the preset time interval is a preset constant, which can be adjusted according to actual conditions.

[0142] Step S606: Control the power bank to indirectly supply power to the charging device.

[0143] After detecting that the charging head has disconnected the direct power supply to the charging device, the power bank outputs energy to the charging head through the contact group according to the preset discharge power; after the charging head receives the energy output by the power bank, the energy is transmitted to the charging device through the charging interface, realizing indirect power supply.

[0144] For example, in the case of poor contact of the wall socket, the power output is intermittently interrupted; after detecting the abnormality for 3.1 seconds, the control charging head closes the external power supply path and triggers the indirect power supply mode; the power bank outputs 12W power to the charging head through the contact group, and the charging head continuously supplies power to the mobile phone at 5V, 2.4A current; even if the external power supply fluctuates repeatedly, the charging device can still indirectly obtain stable power from the power bank, avoiding repeated interruptions during the charging process.

[0145] The embodiment of the present application provides a stage charging method, referring to Figure 7 The method comprises the following steps. Step S701: When the power fluctuation index is less than the first threshold value and greater than the second threshold value, control the charging head to resume charging the power bank and maintain the indirect power supply operation from the power bank to the charging device.

[0146] The first threshold value, the second threshold value and the third threshold value are preset constants, which are grading standards for grading the power fluctuation index, wherein the first threshold value is greater than the second threshold value, the second threshold value is greater than the third threshold value, and the third threshold value is greater than the preset stable threshold value.

[0147] In the process of controlling the power bank to perform the indirect power supply operation to the charging device, the power fluctuation index is obtained again according to the preset detection period, and the power fluctuation index is compared with the grading standard to obtain the interval thereof. When the power fluctuation index is less than the first threshold value and greater than the second threshold value, and the duration is greater than the preset duration, the charging head can charge the power bank, and at the same time, the power bank can perform the indirect power supply operation to the power bank, so as to reduce the probability of damaging the charging device due to power fluctuation when directly using the power supply to supply power to the charging device.

[0148] Step S702: When the power fluctuation index is less than the second threshold value and greater than the third threshold value, the internal power and the external power are adjusted according to the power fluctuation index to obtain the optimized internal power and the optimized external power, wherein the optimized internal power is greater than the optimized external power.

[0149] When the power fluctuation index is less than the first threshold value and greater than the second threshold value, and the duration is greater than the preset duration, the power adjustment ratio is obtained from the preset fluctuation index-power ratio adjustment table according to the power fluctuation index, and the internal power and the external power are adjusted according to the power adjustment ratio, so as to obtain the optimized internal power and the optimized external power.

[0150] Step S703: Control the charging head to charge the power bank using the optimized internal power and charge the charging device using the optimized external power, and maintain the indirect power supply operation from the power bank to the charging device.

[0151] After the optimized power for the power bank and the optimized power for the charging device are obtained, the power bank sends the optimized power for the power bank and the optimized power for the charging device to the control module of the charging head through the communication contact and the docking contact, and the control module of the charging head charges the power bank according to the optimized power for the power bank and charges the charging device according to the optimized power for the charging device. Further, in this process, the power bank still maintains the operation of indirectly supplying power to the charging device.

[0152] Step S704: When the power supply fluctuation index is less than the third threshold value and greater than the preset stable threshold value, a power reduction ratio is calculated according to the difference between the power supply fluctuation index and the preset stable threshold value.

[0153] The power reduction ratio refers to a proportional coefficient for controlling the rated power reduction amplitude, and the value changes with the difference between the power supply fluctuation index and the preset stable threshold value.

[0154] When the power supply fluctuation index is less than the third threshold value and greater than the preset stable threshold value, and the duration is greater than the preset duration, it indicates that the power supply has approached the stable interval at this time, and the charging device can be directly charged by the charging head at this time.

[0155] Wherein, the power supply fluctuation index and the preset stable threshold value are subtracted to obtain a fluctuation difference value, and a difference-value-reduction-ratio table is looked up according to the preset difference-value-reduction-ratio table to obtain the power reduction ratio corresponding to the fluctuation difference value.

[0156] Step S705: The rated charging power of the charging head is reduced based on the power reduction ratio, and the charging device is charged using the reduced power.

[0157] The reduced power refers to the rated power corrected based on the power reduction ratio.

[0158] After the power reduction ratio is obtained, the rated power is reduced according to the power reduction ratio, and the charging device is charged using the reduced power after the rated power is reduced. Further, if the maximum demand power of the charging device is less than the reduced power, the power bank is charged through the contact group according to the difference between the reduced power and the maximum demand power.

[0159] Based on the same inventive concept, the embodiments of the present application provide a power bank control system with a quick-release charging head, comprising: The acquisition module is configured to acquire current information. The memory is configured to store the program of the power bank control method with the quick-release charging head. The processor can load and execute the program in the memory, and implement the power bank control method with the quick-release charging head.

[0160] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0161] The embodiment of the present application provides a computer readable storage medium, which stores a computer program capable of being loaded and executed by a processor to execute the power bank control method with the quick detachable charging head.

[0162] The computer storage medium includes, for example, a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.

[0163] Based on the same inventive concept, the embodiment of the present application provides an intelligent terminal, which comprises a memory and a processor, and the memory stores a computer program capable of being loaded and executed by the processor to execute the power bank control method with the quick detachable charging head.

[0164] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0165] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and any feature disclosed in the specification (including the abstract and the drawings) can be replaced by other equivalent or similar purpose replacement features, unless specifically described. That is, unless specifically described, each feature is only an example of a series of equivalent or similar features.

Claims

1. A control method for a power bank with a quick-release charging head, characterized in that, include: In response to the connection signal of the communication contact, the current information of the charging head is obtained based on the communication connection established between the communication contact and the charging head; A detection current is supplied to the charging head through the contact group; Obtain the feedback current of the detected current, and determine the conduction impedance of the contact group based on the feedback current; The contact mating status is determined based on the conduction impedance. The contact mating status includes mated and unmated. When the contact connection is in the connected state, a charging signal is generated based on the current information and a charging operation is performed. When the contact connection is not connected, a power-off signal is generated based on the current information.

2. The power bank control method with a quick-release charging head according to claim 1, characterized in that, The method further includes: During the charging operation, the on-resistance of the contact group is detected at a preset detection cycle and an impedance change curve is generated based on the on-resistance. Calculate the contact impedance change rate based on the impedance change curve; By fitting the impedance change rate with the historical change rate curve in the historical charging cycle, a contact performance trend model is obtained. The future conduction impedance within a preset time threshold is obtained based on the contact performance trend model; Obtain the duration during which the future on-resistance is greater than the on-threshold; A power reduction control signal is generated based on the duration of the duration. In response to the power reduction control signal, the charging head is controlled to enter the power limiting mode.

3. The power bank control method with a quick-release charging head according to claim 1, characterized in that, The method further includes: Determine whether the charging head is outputting current based on the current information; If so, obtain the external power corresponding to the external output current and the maximum power required by the charging device; Determine whether the sum of the internal power and the maximum required power is greater than the rated charging power of the charger. The internal power refers to the power of the charger when it charges the power bank. If so, obtain the estimated charging time of the power bank based on its internal power. If the expected full charge time is less than the preset time, the charging head will maintain its current internal power to charge the power bank until the expected full charge time is reached. If the expected charging time is not less than the preset first duration, the power of the charging head is adjusted so that the external power approaches the maximum required power, thus obtaining the target external power.

4. A power bank control method with a quick-release charging head according to claim 3, characterized in that, The method further includes: Determine whether the maximum required power exceeds the target external power; If so, the compensation power of the power bank is obtained based on the maximum required power and the rated power. The charging device is indirectly powered according to the compensation power. The indirect power supply operation refers to the operation of supplying power to the charging head and then supplying power to the charging device through the charging head.

5. A power bank control method with a quick-release charging head according to claim 4, characterized in that, The method further includes: Real-time acquisition of the charging stage of the charging device; When the charging stage reaches the preset slow charging stage, obtain the slow charging power of the charging device under the preset slow charging stage. Calculate the supplementary power based on the slow charging power and the rated charging power; Control the charging head to use slow charging power to charge the charging device and use supplementary charging power to charge the power bank.

6. A power bank control method with a quick-release charging head according to claim 5, characterized in that, The method further includes: Real-time acquisition of voltage and current signals at the power input terminal; Calculate power fluctuation indicators based on voltage and current signals; Identify the target time period during which power fluctuation indicators exceed a preset stability threshold; Determine whether the target time period exceeds the preset duration; If so, control the charging head to disconnect the power supply path to the charging device; Control the power bank to indirectly supply power to the charging device.

7. A power bank control method with a quick-release charging head according to claim 5, characterized in that, The method further includes: When the power fluctuation index is less than the first threshold and greater than the second threshold, the charging head is controlled to resume charging the power bank, and the indirect power supply operation from the power bank to the charging device is maintained. When the power fluctuation index is less than the second threshold and greater than the third threshold, the internal power and external power are adjusted according to the power fluctuation index to obtain the optimized internal power and optimized external power, wherein the optimized internal power is greater than the optimized external power. Control the charging head to use optimized internal power to charge the power bank and optimized external power to charge the charging device, while maintaining indirect power supply operation from the power bank to the charging device; When the power fluctuation index is less than the third threshold and greater than the preset stability threshold, the power reduction ratio is calculated based on the difference between the power fluctuation index and the preset stability threshold. The rated charging power of the charger is reduced based on the power reduction ratio, and the target external power is used to charge the charging device.

8. A power bank control system with a quick-release charging head, characterized in that, The system is used to execute the power bank control method with a quick-release charging head as described in any one of claims 1 to 7, including: The acquisition module is used to acquire current information; A memory for storing the program of the power bank control method with a quick-release charging head; The processor and memory can load and execute the program to implement the power bank control method with quick-release charging head.

9. A power bank with a quick-release charging head, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer program is stored that can be loaded by a processor and execute the method as described in any one of claims 1 to 7.

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