Charger with power failure memory function

Abstract

The utility model provides a charger with a power failure memory function, which realizes intelligent charging by integrating an alternating current power supply input module, an EMI (Electro-Magnetic Interference) filtering module, a rectifying module, a filtering module, a voltage dividing module, an MCU (Microprogrammed Control Unit) control module, a memory module, a power failure detection module, a preset time maintenance module and a charging recovery module. The charger can remember parameters such as voltage, current, battery type and the like set by a user, and automatically recover to a state before power failure after the power supply is recovered, and the user does not need to operate again. The function is achieved through cooperative work of the MCU controller, the memory module, the power failure detection module and the recovery module, the operation process is greatly simplified, and the user experience is improved. And when the power supply fails, the preset time maintaining module ensures that the setting is not lost, so that the safety and reliability of the charging process are ensured.

Description

Technical Field

[0001] The present application relates to the field of chargers, and in particular to a charger with a power-off memory function. Background Art

[0002] In order to meet the market demand for the charger to remember the current charging mode when the power is off and automatically resume charging when the call comes back, the charger has multiple charging modes such as: voltage mode: 12V, 24V, battery type mode: LI, STD, AGM, GEL, current mode: 2A, 8A, 15A, AUTO. If the power is off during charging after the selection, the gear will return to the default gear and will not charge when the call comes back. You need to re-select the gear and press the charge start button again to charge, which brings inconvenience to use. Utility Model Content

[0003] The purpose of this application is to provide a charger with a power-off memory function.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A charger with power-off memory function includes an AC power input module, an EMI filter circuit, a high-voltage rectifier, a filter capacitor, a resistor voltage divider circuit, an MCU controller, a charging setting memory module, a power-off detection module, a preset time maintenance module and a charging recovery module, wherein:

[0006] The AC power input module is connected to the EMI filter circuit, the EMI filter circuit is connected to the high-voltage rectifier, the high-voltage rectifier converts AC power into DC power, the high-voltage rectifier is connected to the filter capacitor, the filter capacitor is used to smooth DC power, the filter capacitor is respectively connected to the resistor voltage divider circuit and the MCU controller, the resistor voltage divider circuit reduces the voltage to a level suitable for MCU detection, the MCU controller is responsible for the control logic of the entire charger, the resistor voltage divider circuit and the MCU controller are both connected to the charging setting memory module and the power-off detection module, the charging setting memory module stores the user's charging settings so as to restore after power failure, the power-off detection module is used to detect whether the power supply is powered off, the charging setting memory module and the power-off detection module are both connected to the preset time maintenance module, the preset time maintenance module maintains the memorized charging settings for a certain period of time, the preset time maintenance module is connected to the charging recovery module, and when the AC power is restored, the charging recovery module controls the charger to restore to the charging state before power failure.

[0007] Furthermore, the resistor voltage divider circuit and the MCU controller are connected to the charging setting memory module and the power-off detection module through a voltage regulator and an MCU power supply circuit, and the voltage regulator and the MCU power supply circuit are used to provide a stable DC power supply to the MCU controller and other circuits requiring power.

[0008] Furthermore, the charging recovery module is connected to a safety protection module, and the safety protection module is used to protect the charger and the battery in the event of power failure or other abnormal conditions.

[0009] Furthermore, the safety protection module is also connected to a battery voltage maintenance module and a display and indication module, wherein the battery voltage maintenance module is used to ensure that the MCU controller can continue to work in the event of a power outage, and the display and indication module is used to provide visual feedback of the charger status to the user.

[0010] Furthermore, the battery voltage maintaining module and the display and indication module are connected to a charging circuit module, and the charging circuit module executes a circuit for charging the battery.

[0011] Furthermore, the high-voltage rectifier is a diode D13.

[0012] Furthermore, the filter capacitor is capacitor C44.

[0013] Furthermore, the resistor voltage divider circuit includes a resistor R80 and a resistor R81.

[0014] Furthermore, the battery voltage maintaining module is a transistor Q9 and a diode D14.

[0015] The beneficial effects of this application are:

[0016] (1) This application is implemented through the collaborative work of an MCU controller, a charging setting memory module, a power failure detection module, and a charging recovery module. The MCU controller is responsible for the control logic, the charging setting memory module stores the user settings, the power failure detection module detects the power status, and the charging recovery module is responsible for restoring to the previous charging status when the power is restored. When the charger loses power for some reason during the charging process, it can remember the user's charging settings (such as voltage, current, battery type, etc.). Once the power is restored, the charger will automatically return to the charging status before the power outage without the user having to reset it. This greatly simplifies the operation process and improves the user experience.

[0017] (2) The synergy of the MCU controller, the charging setting memory module, the power failure detection module and the charging recovery module of the present application makes the charger intelligent and automated, capable of autonomously detecting the power status and automatically adjusting the charging parameters according to the user's settings. This intelligent design makes the charger more convenient and easy to use.

[0018] (3) The preset time maintenance module of the present application can maintain the memorized charging settings for a certain period of time to ensure that the previous charging state can be correctly restored when the power is restored. Since the charger can remember the user's charging settings and automatically restore them when the power is restored, charging problems caused by user misoperation or forgetting of settings are avoided, thereby improving the safety and reliability of the charging process.

[0019] (4) The charger of the present application can reduce energy consumption while ensuring the charging effect. By automatically restoring to the previous charging state, the extra energy consumption caused by resetting the charging parameters is avoided, thereby achieving energy-saving and environmental protection effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the block principle structure of a charger with a power-off memory function provided in one embodiment of the present application;

[0021] Figure 2 A partial circuit diagram of a charger with a power-off memory function provided by an embodiment of the present application;

[0022] Figure 3 A partial circuit diagram of a charger with a power-off memory function provided by an embodiment of the present application;

[0023] Figure 4 A circuit diagram of an MCU controller of a charger with a power-off memory function provided in one embodiment of the present application;

[0024] Description of reference numerals:

[0025] 1. AC power input module; 2. EMI filter circuit; 3. High-voltage rectifier; 4. Filter capacitor; 5. Resistor voltage divider circuit; 6. MCU controller; 7. Charging setting memory module; 8. Power failure detection module; 9. Preset time maintenance module; 10. Charging recovery module; 11. Voltage stabilizer; 12. MCU power supply circuit; 13. Safety protection module; 14. Battery voltage maintenance module; 15. Display and indication module; 16. Charging circuit module; DETAILED DESCRIPTION

[0026] The terms used in the implementation method part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The implementation method of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 4As shown, a charger with power-off memory function includes an AC power input module 1, an EMI filter circuit 2, a high-voltage rectifier 3, a filter capacitor 4, a resistor voltage divider circuit 5, an MCU controller 6, a charging setting memory module 7, a power-off detection module 8, a preset time maintenance module 9 and a charging recovery module 10, wherein:

[0028] The AC power input module 1 is connected to the EMI filter circuit 2, the EMI filter circuit 2 is connected to the high-voltage rectifier 3, the high-voltage rectifier 3 converts AC power into DC power, the high-voltage rectifier 3 is connected to the filter capacitor 4, the filter capacitor 4 is used to smooth the DC power, the filter capacitor 4 is respectively connected to the resistor voltage divider circuit 5 and the MCU controller 6, the resistor voltage divider circuit 5 reduces the voltage to a level suitable for MCU detection, the MCU controller 6 is responsible for the control logic of the entire charger, the resistor voltage divider circuit 5 and the MCU controller 6 are both connected to the charging setting memory module 7 and the power-off detection module 8, the charging setting memory module 7 stores the user's charging settings so that they can be restored after power failure, the power-off detection module 8 is used to detect whether the power supply is powered off, the charging setting memory module 7 and the power-off detection module 8 are both connected to the preset time maintenance module 9, the preset time maintenance module 9 maintains the memorized charging settings within a certain period of time, the preset time maintenance module 9 is connected to the charging recovery module 10, when the AC power is restored, the charging recovery module 10 controls the charger to restore to the charging state before the power failure.

[0029] In this embodiment, the resistor voltage divider circuit 5 and the MCU controller 6 are connected to the charging setting memory module 7 and the power-off detection module 8 through the voltage regulator 11 and the MCU power supply circuit 12. The voltage regulator 11 and the MCU power supply circuit 12 are used to provide a stable DC power supply to the MCU controller 6 and other circuits that require power.

[0030] In this embodiment, the charging recovery module 10 is connected to a safety protection module 13, and the safety protection module 13 is used to protect the charger and the battery in case of power failure or other abnormal conditions.

[0031] In this embodiment, the safety protection module 13 is also connected to a battery voltage maintenance module 14 and a display and indication module 15. The battery voltage maintenance module 14 is used to ensure that the MCU controller 6 can continue to work in the event of a power outage, and the display and indication module 15 is used to provide the user with visual feedback on the charger status.

[0032] In this embodiment, the battery voltage maintaining module 14 and the display and indication module 15 are connected to a charging circuit module 16 , and the charging circuit module 16 executes a circuit for charging the battery.

[0033] In this embodiment, the high voltage rectifier 3 is a diode D13.

[0034] In this embodiment, the filter capacitor 4 is a capacitor C44.

[0035] In this embodiment, the resistor voltage divider circuit 5 includes a resistor R80 and a resistor R81.

[0036] In this embodiment, the battery voltage maintaining module 14 is a transistor Q9 and a diode D14.

[0037] The working principle of the charger is:

[0038] The charger is connected to the AC power supply, and an output is specially added to detect the AC power status. The EMI filter circuit 2 is used to reduce the electromagnetic interference circuit, and then the high-voltage rectifier 3 is rectified through the diode D13, and the capacitor C44 is filtered. The resistors R80 and R81 of the resistor divider circuit 5 divide the filtered voltage. The divided signal is sent to the 4th pin of the MCU controller 6 for detection. AC input detection:

[0039] If the MCU controller 6 detects that the voltage is greater than 3V, it indicates that there is AC input and the AC power input module 1 works normally.

[0040] If there is no AC input, the MCU controller 6 detects that the voltage is less than 3V, and the MCU immediately switches to the power-off working mode.

[0041] Power-down working mode:

[0042] AC power input module 1 stops working;

[0043] The transistor Q9 of the battery voltage maintenance module 14 remains in the open state and is not closed.

[0044] The battery voltage is fed into the regulator 11U3 through the battery voltage maintaining module 14 transistor Q9 and diode D14.

[0045] The U3 voltage regulator 11 converts the battery voltage into a stable 5V voltage to power the MCU controller 6; the LCD screen of the display and indication module 15 displays the power-off code E9, the charging setting memory module 7 remembers the current battery voltage mode, battery type mode and current mode, and the preset time maintenance module 9 starts timing until the preset time is reached. Within the preset time, if the AC voltage is restored:

[0046] The MCU controller 6 detects that the voltage is greater than 3V.

[0047] The MCU controller 6 enters the charging mode.

[0048] The power-off code E9 on the LCD screen of the display and indication module 15 disappears.

[0049] Charging resumes automatically without any further user intervention.

[0050] If the preset time is exceeded, the MCU controller 6 turns off the battery voltage maintaining module 14 and stops the reverse power supply.

[0051] Through the above steps, the charger can maintain necessary information in the event of a power outage and automatically restore to the charging state before the power outage when the power is restored, thereby improving user convenience and the continuity of the charging process.

[0052] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0053] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0054] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A charger with power-off memory function, characterized in that: It includes an AC power input module, an EMI filter circuit, a high-voltage rectifier, a filter capacitor, a resistor voltage divider circuit, an MCU controller, a charging setting memory module, a power failure detection module, a preset time maintenance module and a charging recovery module, among which: The AC power input module is connected to the EMI filter circuit, the EMI filter circuit is connected to the high-voltage rectifier, the high-voltage rectifier converts AC power into DC power, the high-voltage rectifier is connected to the filter capacitor, the filter capacitor is used to smooth DC power, the filter capacitor is respectively connected to the resistor voltage divider circuit and the MCU controller, the resistor voltage divider circuit reduces the voltage to a level suitable for MCU detection, the MCU controller is responsible for the control logic of the entire charger, the resistor voltage divider circuit and the MCU controller are both connected to the charging setting memory module and the power-off detection module, the charging setting memory module stores the user's charging settings so as to restore after power failure, the power-off detection module is used to detect whether the power supply is powered off, the charging setting memory module and the power-off detection module are both connected to the preset time maintenance module, the preset time maintenance module maintains the memorized charging settings for a certain period of time, the preset time maintenance module is connected to the charging recovery module, and when the AC power is restored, the charging recovery module controls the charger to restore to the charging state before power failure.

2. A charger with power-off memory function according to claim 1, characterized in that: The resistor voltage divider circuit and the MCU controller are connected to the charging setting memory module and the power-off detection module through a voltage stabilizer and an MCU power supply circuit. The voltage stabilizer and the MCU power supply circuit are used to provide a stable DC power supply to the MCU controller and other circuits requiring power.

3. The charger with power-off memory function according to claim 1, characterized in that: The charging recovery module is connected to a safety protection module, and the safety protection module is used to protect the charger and the battery in case of power failure or other abnormal conditions.

4. A charger with power-off memory function according to claim 3, characterized in that: The safety protection module is also connected to a battery voltage maintenance module and a display and indication module. The battery voltage maintenance module is used to ensure that the MCU controller can continue to work in the event of a power outage, and the display and indication module is used to provide visual feedback of the charger status to the user.

5. The charger with power-off memory function according to claim 4, characterized in that: The battery voltage maintaining module and the display and indication module are connected with a charging circuit module, and the charging circuit module executes a circuit for charging the battery.

6. The charger with power-off memory function according to claim 1, characterized in that: The high voltage rectifier is a diode D13.

7. The charger with power-off memory function according to claim 1, characterized in that: The filter capacitor is capacitor C44.

8. The charger with power-off memory function according to claim 1, characterized in that: The resistor voltage divider circuit includes a resistor R80 and a resistor R81.

9. The charger with power-off memory function according to claim 4, characterized in that: The battery voltage maintaining module includes a transistor Q9 and a diode D14.

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