Anti-overcharge control method and charging line

Abstract

The invention provides an anti-overcharge control method and a charging line, and relates to the technical field of charging lines. The method is applied to a controller in a charging line, and comprises the following steps: firstly, when detecting that the charging line is connected to a load, judging whether communication with the load can be established; if yes, acquiring battery information sent by the load, and determining whether the load is fully charged based on the battery information so as to control the charging link to be disconnected after the load is fully charged; and if not, acquiring data information of the charging link, and determining whether the load is fully charged based on the data information so as to control the charging link to be disconnected after the first set time after the load is fully charged. The anti-overcharge control method and the charging line provided by the invention have the advantage of effectively realizing anti-overcharge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging lines, in particular to a method for preventing overcharging and a charging line. BACKGROUND

[0002] In daily life, the battery life of a smart device is a key factor affecting user experience. In order to prolong the battery life of a smart device, overcharging and over-discharging of the battery should be avoided. Overcharging of the battery refers to a phenomenon that the charging line continues to charge the battery after the battery is fully charged, which affects the service life and safety of the battery.

[0003] At present, in order to prevent overcharging, a fixed time is usually preset in the internal chip of the charging line or the charging head. After detecting that a device is inserted, the countdown is started. When the countdown is over, the output of the data line to the device is turned off. The preset time is usually longer than the complete charging time of the device. However, in this way, if the device is charged when the power is relatively high, the effect of preventing overcharging is poor.

[0004] In summary, the prior art has the problem of poor effect of preventing overcharging. SUMMARY

[0005] The present application aims to provide a method for preventing overcharging and a charging line to solve the problem of poor effect of preventing overcharging in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0007] On the one hand, the embodiments of the present application provide a method for preventing overcharging, which is applied to a controller in a charging line. The charging line is used to connect a load. The method comprises the following steps:

[0008] When it is detected that the charging line is connected to the load, it is determined whether communication with the load can be established;

[0009] If yes, the battery information sent by the load is acquired, and it is determined whether the load is fully charged based on the battery information, so as to control the charging link to be disconnected when the load is fully charged;

[0010] If no, the data information of the charging link is acquired, and it is determined whether the load is fully charged based on the data information, so as to control the charging link to be disconnected after a first set time when the load is fully charged.

[0011] Optionally, a button is arranged on the charging line, and the button is connected to the controller. After the step of acquiring the data information of the charging link and determining whether the load is fully charged based on the data information, the method further comprises the following steps:

[0012] When receiving the key information, data information of the charging link is acquired in a set time period;

[0013] The data information acquired in the current period is compared with the data information acquired in the last period, and when the difference between the two is greater than a threshold, the data information acquired in the current period is updated as the set information;

[0014] When the load is disconnected or the set information has no change in a second set time period, the set information is taken as the reference information.

[0015] Optionally, the charging line is provided with a key, and after the steps of acquiring the battery information sent by the load and determining whether the load is fully charged based on the battery information, the method further comprises:

[0016] When it is determined that the load is fully charged, data information of the charging link is acquired, and the data information is taken as the reference information.

[0017] Optionally, the method further comprises:

[0018] When receiving the key information for a third set time, the reference information is restored to a default value.

[0019] Optionally, after the steps of controlling the disconnection of the charging link or controlling the disconnection of the charging link after a first set time, the method further comprises:

[0020] After an interval set time, battery information sent by the load or data information of the charging link is acquired, and it is determined whether the load is in a full charge state;

[0021] If not, the charging link is controlled to continue charging the load until the load is fully charged.

[0022] Optionally, after the step of determining whether the load is in the full charge state, the method further comprises:

[0023] Current information and / or voltage information of the charging link is acquired;

[0024] It is determined that the load is in a state based on the current information and / or voltage information; wherein the state of the load includes a standby state and a power consumption state;

[0025] After the load is fully charged, a time interval is determined based on the state of the load, and battery information sent by the load or data information of the charging link is re-acquired according to the time interval, and it is determined whether the load is in a full charge state.

[0026] Optionally, the step of determining the time interval based on the state of the load comprises:

[0027] When the load is in the standby state, the time interval is determined as a first time interval;

[0028] When the load is in the power consumption state, the time interval is determined as a second time interval; wherein the first time interval is greater than the second time interval.

[0029] Optionally, a key is arranged on the charging line, and the key is connected with the controller. After the step of controlling the charging link to be disconnected or controlling the charging link to be disconnected after the first set time, the method further comprises:

[0030] When receiving at least two consecutive key information, the battery information sent by the load or the data information of the charging link is obtained, and it is determined whether the load is in the full power state.

[0031] Optionally, the battery information includes voltage information and current information, and the step of determining whether the load is fully charged based on the battery information comprises:

[0032] When the voltage information is in a preset voltage interval and the current information is less than a current threshold, it is determined that the load is fully charged.

[0033] In another aspect, the embodiments of the present application also provide a charging line, which comprises a controller, a charging link and a switch module. The switch module is arranged on the charging link, and the switch module is electrically connected with the controller. The controller is used to execute the overcharge prevention control method.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The present application provides an overcharge prevention control method and a charging line. The method is applied to a controller in a charging line. First, when detecting that the charging line is connected to a load, it is determined whether communication with the load can be established. If yes, battery information sent by the load is obtained, and it is determined whether the load is fully charged based on the battery information, so as to control the charging link to be disconnected after the load is fully charged. If no, data information of the charging link is obtained, and it is determined whether the load is fully charged based on the data information, so as to control the charging link to be disconnected after the first set time after the load is fully charged. Since the present application can determine whether the load is fully charged based on the battery information sent by the load or the data information of the charging link after detecting the load through the charging line, and the charging link is disconnected in time after the load is fully charged, the effective overcharge prevention effect can be achieved.

[0036] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0038] Figure 1 Circuit diagram of the charging line in the prior art.

[0039] Figure 2 An exemplary flow chart of the overcharge prevention control method provided by the embodiments of the present application.

[0040] Figure 3 Another exemplary flow chart of the overcharge prevention control method provided by the embodiments of the present application.

[0041] Figure 4 Module schematic diagram of the charging line provided by the embodiments of the present application.

[0042] In the figure:

[0043] 110-controller; 120-charging link; 130-switching module; 140-sampling module. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0046] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions.

[0048] Some embodiments of the present application will be described in detail with reference to the drawings. The following examples and features in the examples can be combined with each other in the case of no conflict.

[0049] As described in the background, at present, in order to achieve the effect of overcharge prevention, a countdown scheme is generally set on the internal chip of the charging line or the charging head. For example, please refer to Figure 1 , which is a schematic diagram of the circuit of the charging line in the prior art. The control chip is connected with the power line and the ground line through the voltage stabilizer, so as to realize the power supply of the control chip. In addition, the charging link also includes a relay, a diode D1 and a pull-down resistor R1. When the charging line is not connected with the load, the monitoring pin of the control chip is connected with the ground through the pull-down resistor, so that a low level is sampled. When the load is connected, the monitoring pin of the controller is pulled up, so that the control chip can identify that the charger has been connected with the load. The control chip can control the relay to be turned on, so as to realize the purpose of charging the battery in the load.

[0050] In order to achieve the effect of overcharge prevention, a timing time is set in the control chip, which is set according to the size of the load battery, and the preset timing is usually greater than the complete charging time of the device. Once the control chip controls the relay to be turned on, the controller starts timing, and when the timing time is reached, the controller controls the relay to be turned off.

[0051] For example, the battery of the load needs 2.5h to be charged from the no-electricity state to the full-electricity state, and on this basis, the timing time can be set to 3h. However, in this charging mode, if the load starts charging from 10% remaining power, the charging time is long, and overcharge phenomenon does not occur. But if the load starts charging from 90% remaining power, the charging time is short, such as 10 minutes, and the remaining time is still in charging, which is easy to cause overcharge phenomenon.

[0052] Therefore, in order to solve the above problems, the present application provides an overcharge prevention control method, which is applied to the controller in the charging line. Please refer to Figure 2 , which comprises the following steps.

[0053] S102, when it is detected that the charging line is connected to the load, it is judged whether communication with the load can be established; if yes, S104 is executed, and if no, S106 is executed.

[0054] S104, acquire the battery information sent by the load, and determine whether the load is fully charged based on the battery information, so as to control the charging link to be disconnected after the load is fully charged.

[0055] S106, acquire the data information of the charging link, and determine whether the load is fully charged based on the data information, so as to control the charging link to be disconnected after the load is fully charged.

[0056] It should be noted that the circuit provided by the present application for connecting the charging line to the load can also use the circuit as shown in Figure 1 The controller can also identify whether the load is connected by detecting the positive voltage of the diode. Once the load is connected, the controller controls the relay to be closed, thereby supplying power to the load.

[0057] It should be noted that the type of load is not limited in the present application, which can be a mobile phone, a tablet computer or the like.

[0058] When the controller identifies that the load is inserted into the charging line, the relay is controlled to be turned on, thereby supplying power to the load. At the same time, the controller in the charging line attempts to establish communication with the load. For example, the controller sends a PD protocol instruction to the load. If the load has a corresponding instruction reply, the two can communicate. Otherwise, if the load has no corresponding instruction reply, the two cannot communicate.

[0059] If the controller and the load can communicate, the controller can send a request instruction and request the load to return the battery information. Generally, the load can accurately monitor the battery information, which includes but is not limited to the actual capacity of the battery, the current power, the current, the voltage and the like. After the controller receives the information, it can determine whether the load is fully charged in combination with the corresponding judgment condition. For example, the controller is provided with a judgment voltage and current. By judging whether the battery information is within the range of the full charge value of the mobile phone, it can accurately determine whether the load is fully charged. For example, the voltage is between 4.0V and 4.5V, and the current is less than 10mA, which means that the load is fully charged.

[0060] Since the battery information is monitored by the load itself, more accurate battery information can be collected. Then, after determining that the load is fully charged, the charging link can be directly controlled to be disconnected, thereby preventing overcharging.

[0061] When the charging line cannot normally communicate with the load, for example, the controller sends an instruction to the load, and the load does not reply to the instruction, the charging line cannot directly obtain the battery information of the load. At this time, the controller can obtain the data information of the charging link, and determine whether the load is fully charged based on the data information. That is, the charging line compares the output voltage and current value of itself with the default value in the controller to determine whether the condition of full charge of the load is met, for example, the default value is that the output voltage of the charging link is 5V and the output current is less than 10mA. When the load is fully charged, the first set time countdown, for example, 30min countdown, starts, and the relay is turned off to stop charging the load when the countdown ends.

[0062] Since the data information obtained by measuring the charging link has relatively large parameter error, when the load is determined to be fully charged based on the data information of the charging link, the controller still needs to wait for a first set time period before controlling the relay to be disconnected to ensure that the battery is fully charged.

[0063] In addition, in order to improve the overcharge prevention effect, a button is arranged on the charging line and connected with the controller. Please refer to Figure 3 The method further comprises:

[0064] S1071, when the button information is received, obtaining the data information of the charging link in a set time period.

[0065] S1072, comparing the data information obtained in the current period with the data information obtained in the last period, and updating the data information obtained in the current period as set information when the difference between the two is greater than a threshold value.

[0066] S1073, when the load is disconnected or the set information does not change in a second set time period, taking the set information as reference information.

[0067] In the case that the load does not reply to the instruction, if the user presses the button, the controller will start timing, detect the output voltage and current value in a certain time period, and compare the voltage and current data detected in the current period with the data in the last period. If the deviation is within a certain range, for example, 5%, the detected data is not recorded, otherwise, the new voltage and current data are recorded to replace the last data, until the load is disconnected (by default, the load is fully charged when the user disconnects) or the set information does not change in a second set time period, the set information is taken as reference information. That is, after being fully charged, the data information of the charging link will not change.

[0068] The finally recorded data is used as reference information, and the detected voltage and current are compared with the reference information in real time when the load is charged subsequently, so that it can be determined whether the load is fully charged at present.

[0069] And, when the long press button, the controller receives the button information for a third set time, the controller performs the factory settings, and the reference information is restored to the default value.

[0070] Through this setting mode, in the initial state, the default value is compared with the data information of the charging link, and then it is determined whether the load battery is full. And when the charging line is used for other models of load, since the reference signal can be updated, it can be adapted to different models or types of load. In addition, after the load is used for a period of time, the battery information may change, that is, the corresponding reference information changes, so the reference information can also be updated in real time.

[0071] Of course, when the controller can obtain the battery information sent by the load, the user can also press the button, at this time, after determining that the load is fully charged, the controller can also obtain the data information of the charging link, and the data information is taken as the reference information. In this way, the accurate full charge corresponding data information can be taken as the reference information, which provides accurate reference for subsequent identification.

[0072] Furthermore, when the load is fully charged, the load will consume power during standby or use. At this time, if the load power is low, the load needs to be recharged. On this basis, please refer to Figure 4 The method further comprises:

[0073] S1081, after the interval set time, the battery information sent by the load or the data information of the charging link is obtained, and it is determined whether the load is in the full power state. If not, S1082 is executed, and if yes, S1083 is executed.

[0074] S1082, control the charging link to continue charging the load until the load is fully charged.

[0075] S1083, control the charging link to disconnect.

[0076] That is, when there is a load inserted, the controller detects that there is a load inserted, tries to read the battery information of the load, and succeeds to read it. Then it directly judges whether the load is full or not. The judgment method is consistent with the above-mentioned overcharge prevention. If it is full, the relay is closed, and after a preset countdown time, for example, half an hour, the switch is opened again to read the load information. If it is judged that the load is not full, the relay is opened to charge until it enters the overcharge prevention mode. If the load does not support reading information, after a preset countdown time, the switch is opened to detect the voltage and current output by the data line, and compared with the recorded voltage and current data. If the detected data is within a certain error range of the recorded data, it is considered that the load is full, and the switch is closed. Otherwise, the switch is opened to recharge the load.

[0077] And, in practical applications, when the load is fully charged, the reasons for reducing the power consumption of the load include standby energy consumption and power consumption caused by the user playing while charging. Understandably, the power consumption of the playing-while-charging mode is significantly higher than that of standby. Therefore, after determining whether the load is in a fully charged state, the method further includes:

[0078] S1091, obtaining current information and / or voltage information of the charging link.

[0079] S1092, determining the state of the load based on the current information and / or voltage information; wherein the state of the load includes standby state and power consumption state.

[0080] S1093, after the load is fully charged, determining a time interval based on the state of the load, and reacquiring battery information sent by the load or data information of the charging link according to the time interval, and determining whether the load is in a fully charged state.

[0081] Wherein, the standby state or power consumption state of the load can be determined based on the size of the charging current or voltage. The power consumption state refers to the state of the user playing while charging. If the current value is small, it indicates that the load is in standby state; when the current value is large, it indicates that the load is in power consumption state.

[0082] After determining the state of the load, the time for the next detection can be determined based on the state of the load. For example, when the load is in standby state, the time interval is determined to be a first time interval; when the load is in power consumption state, the time interval is determined to be a second time interval; wherein the first time interval is greater than the second time interval.

[0083] Through this setting mode, the time interval for recharging detection can be lengthened when in the standby state of low power consumption, thereby avoiding frequent starting of the controller. And when in the power consumption state of low power, the time interval for recharging detection can be shortened, thereby quickly recharging the load when the load consumes power.

[0084] In an implementation manner, when the load is in power consumption state, because the power consumption of the load is not consistent under different working conditions, the time interval can also be dynamically adjusted for different working conditions. For example, when the load is a mobile phone, if the user uses the mobile phone to play games, the power consumption is the fastest; if the user only uses the mobile phone to chat, the power consumption is relatively slow. Or, when the user uses the mobile phone to open multiple APPs at the same time, the power consumption is the fastest; while when only a single APP is used, the power consumption is relatively slow.

[0085] On this basis, the second time interval can be divided into multiple time sub-intervals, and the multiple time sub-intervals increase in this way. Moreover, after the current information and / or voltage information of the charging link are acquired, the power consumption interval in which the load is located can be determined based on the current information and / or voltage information, wherein each power consumption interval corresponds to a time sub-interval, so that the controller can dynamically adjust the time interval of the recharging based on the real-time current information and / or voltage information.

[0086] For example, the second time interval is 30 min, and the second time interval can be divided into three time sub-intervals, which are 10 min, 20 min and 30 min, respectively. Among the charging current acquired from the link, a first current threshold, a second current threshold and a third current threshold are set, and the first current threshold, the second current threshold and the third current threshold increase in turn. When the acquired current value is less than the first current threshold, the controller determines that the time interval is 10 min; when the acquired current value is greater than the first current threshold and less than the second current threshold, the controller determines that the time interval is 20 min; when the acquired current value is greater than the second current threshold and less than the third current threshold, the controller determines that the time interval is 30 min; and when the acquired current value is greater than the third current threshold, the controller determines that the load is in a standby state at this time, and determines that the time interval is the first time interval.

[0087] Through this implementation manner, it can be guaranteed that after the load is fully charged on the basis of the overcharge prevention, the full charge state can be maintained to the maximum extent, so that the user can disconnect the load and the charging line at any time, and the load can be in the full charge state at the time of disconnection, thereby improving the user experience.

[0088] In addition, the user can also control the charging line to immediately perform the recharging detection, for example, when receiving at least two consecutive key information, the battery information sent by the load or the data information of the charging link is acquired, and it is determined whether the load is in a full charge state. That is, when the user presses the key for 2 times or 3 times or more times in succession, the controller immediately performs the recharging, which is convenient to control.

[0089] It can be understood that the overcharge prevention control logic is executed each time the recharging is performed, and during each recharging process, when the load is fully charged, the controller controls the charging link to be disconnected, and after a certain time, the recharging is started again. This goes back and forth until the user disconnects the connection between the load and the charging line.

[0090] Based on the above implementation manner, the embodiment of the present application further provides a charging wire, which comprises a controller 110, a charging link 120 and a switch module 130, the switch module 130 is arranged on the charging link, and the switch module 130 is electrically connected with the controller 110, and the controller 110 is used for executing the overcharge prevention control method described above. In addition, the charging wire further comprises a sampling module 140, which is connected with the controller 110 and the charging link 120 respectively, so as to sample the voltage, current and other parameters of the charging link 120.

[0091] In summary, the present application provides an overcharge prevention control method and a charging wire, the method is applied to a controller in the charging wire, first, when detecting that the charging wire is connected to a load, it is judged whether communication with the load can be established; if yes, battery information sent by the load is acquired, and whether the load is fully charged is determined based on the battery information, so as to control the charging link to be disconnected after the load is fully charged; if no, data information of the charging link is acquired, and whether the load is fully charged is determined based on the data information, so as to control the charging link to be disconnected after the first set time after the load is fully charged. Since the present application can determine whether the load is fully charged based on the battery information sent by the load or the data information of the charging link after detecting the load through the charging wire, and the charging link is disconnected in time after the load is fully charged, the effective overcharge prevention effect can be achieved.

[0092] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0093] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. An overcharge prevention control method, characterized in that, A controller used in a charging cable for connecting a load, the method comprising: When the charging cable is detected to be connected to the load, it is determined whether communication can be established with the load; If so, obtain the battery information sent by the load, and determine whether the load is fully charged based on the battery information, so as to control the charging link to disconnect after the load is fully charged; If not, the charging link data information is obtained, and the load is determined based on the data information to determine whether it is fully charged. After the load is fully charged, the charging link is controlled to disconnect after a first set time.

2. The overcharge prevention control method as described in claim 1, characterized in that, The charging cable is equipped with a button, which is connected to the controller. After the steps of acquiring charging link data information and determining whether the load is fully charged based on the data information, the method further includes: When a button press is received, data information of the charging link is acquired according to a set time period. The data information obtained in the current period is compared with the data information obtained in the previous period, and when the difference between the two is greater than the threshold, the data information obtained in the current period is updated to the set information. When the connection to the load is disconnected, or when the setting information remains unchanged within a second set time period, the setting information is used as reference information.

3. The overcharge prevention control method as described in claim 1, characterized in that, The charging cable is equipped with a button. After the steps of acquiring battery information sent by the load and determining whether the load is fully charged based on the battery information, the method further includes: Upon receiving a button press and confirming that the load is fully charged, the data information of the charging link is acquired and used as reference information.

4. The overcharge prevention control method as described in claim 2 or 3, characterized in that, The method further includes: When a key press is received for a third set period of time, the referenced information will be restored to its default value.

5. The overcharge prevention control method as described in claim 1, characterized in that, After the step of controlling the charging link to disconnect or controlling the charging link to disconnect after a first set time, the method further includes: After a set interval, acquire battery information or charging link data information sent by the load, and determine whether the load is fully charged. If not, the charging link is controlled to continue charging the load until the load is fully charged.

6. The overcharge prevention control method as described in claim 5, characterized in that, After determining whether the load is fully charged, the method further includes: Obtain current and / or voltage information of the charging link; The state of the load is determined based on the current information and / or voltage information; wherein, the state of the load includes standby state and power consumption state; After the load is fully charged, a time interval is determined based on the state of the load, and the battery information or charging link data information sent by the load is re-acquired according to the time interval to determine whether the load is fully charged.

7. The overcharge prevention control method as described in claim 6, characterized in that, The steps for determining the time interval based on the state of the load include: When the load is in standby mode, the time interval is determined to be the first time interval; When the load is in a power-consuming state, the time interval is determined to be the second time interval; wherein the first time interval is greater than the second time interval.

8. The overcharge prevention control method as described in claim 1, characterized in that, The charging cable is equipped with a button, which is connected to the controller. After the steps of controlling the charging link to disconnect or controlling the charging link to disconnect after a first set time, the method further includes: When at least two consecutive key presses are received, the battery information or charging link data sent by the load is obtained, and it is determined whether the load is fully charged.

9. The overcharge prevention control method as described in claim 1, characterized in that, The battery information includes voltage and current information. The steps for determining whether the load is fully charged using the battery information include: When the voltage information is within a preset voltage range and the current information is less than a current threshold, the load is determined to be fully charged.

10. A charging cable, characterized in that, The charging cable includes a controller, a charging link, and a switch module. The switch module is disposed on the charging link and is electrically connected to the controller. The controller is used to execute the overcharge prevention control method as described in any one of claims 1 to 9.

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