Charging circuit with Turbo battery charger and charger with Turbo

Abstract

The charging circuit comprises a PFC circuit, an LLC circuit, a control module, a single-chip microcomputer, an optical coupling circuit, an EMI filter circuit and a sampling detection module, the single-chip microcomputer is connected with the control module, the optical coupling circuit and the sampling detection module, and the input end of the EMI filter circuit, the input end of the PFC circuit and the input end of the LLC circuit are connected in sequence; wherein the output end of the LLC circuit is connected with a storage battery, and the EMI filter circuit is connected with an external power supply. By adopting the PFC circuit, the LLC circuit and the control module, the charging efficiency is effectively improved, the energy loss is reduced, the battery can be fully charged in a shorter time, and the quick charging requirement of people is met. And meanwhile, the optocoupler circuit and the sampling detection module are adopted, so that the temperature change in the charging process can be monitored in real time, the abnormal conditions such as overcharge and overheating of the battery are effectively prevented, and the risk of safety accidents of the storage battery is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of chargers, and in particular to a charging circuit with a Turbo battery charger and a charger with Turbo. Background Art

[0002] With the development of science and technology in recent years, people are increasingly pursuing a convenient lifestyle, and batteries are becoming more and more integrated into life. Batteries include rechargeable lithium batteries and lead-acid batteries. Among them, rechargeable lithium batteries play an extremely important role. Lithium batteries have become an indispensable part of people's daily life and work.

[0003] Electronic products and power tools that use lithium batteries for energy can be found everywhere, but there are still many problems to be solved in lithium battery charging. The most important problem in the lithium battery charging process is the charging efficiency and safety of lithium battery charging. Based on long-term knowledge accumulation, the essence of lithium battery safety accidents can be summarized as follows: the battery temperature rises abnormally under abnormal conditions of use such as overcharging, overheating, impact, short circuit, etc., which triggers a series of internal chemical reactions, causing combustion or explosion, leading to serious safety accidents. The increase in charger temperature comes from the power loss during the charger operation, and these losses are converted into heat.

[0004] Existing battery chargers have serious power loss and low charging efficiency, making it difficult to meet the needs of safe and fast charging. Utility Model Content

[0005] The purpose of the present application is to provide a charging circuit with a Turbo battery charger and a charger with Turbo to solve the problems of severe power loss and low charging efficiency of the battery charger.

[0006] In order to solve the above problems, the present application adopts the following technical solutions:

[0007] A first aspect of the present application provides a charging circuit with a Turbo battery charger, wherein the battery charger is used to charge a storage battery, and the charging circuit comprises: a PFC circuit, an LLC circuit, a control module, a single-chip microcomputer, an optocoupler circuit, an EMI filter circuit and a sampling detection module, wherein the single-chip microcomputer is respectively connected to the control module, the optocoupler circuit and the sampling detection module, and input ends of the EMI filter circuit, the PFC circuit and the LLC circuit are connected in sequence; wherein the output end of the LLC circuit is connected to the storage battery, and the EMI filter circuit is connected to an external power supply.

[0008] By adopting PFC circuit, LLC circuit and control module, the charging efficiency is effectively improved, energy loss is reduced, and the battery can be fully charged in a shorter time, meeting people's demand for fast charging. At the same time, the use of optocoupler circuit and sampling detection module can monitor the temperature changes during the charging process in real time, effectively preventing abnormal conditions such as overcharging and overheating of the battery, thereby reducing the risk of safety accidents of the battery.

[0009] Furthermore, the EMI filtering circuit includes a plurality of common-mode inductors, and the plurality of common-mode inductors are connected in series in sequence.

[0010] By adopting an EMI filter circuit composed of multiple common-mode inductors, electromagnetic interference can be effectively suppressed, making the filtering effect of the EMI filter circuit more significant, and enabling the charger to have better suppression capabilities for interference signals within a wider frequency range.

[0011] Furthermore, the sampling detection module includes a first filter circuit and a second filter circuit, the first filter circuit and the second filter circuit are connected, the first filter circuit is connected to the output end of the LLC circuit, and the second filter circuit is connected to the single chip microcomputer.

[0012] Since the first filter circuit is connected to the output end of the LLC circuit, it can filter the voltage signal at the output end of the charger, reduce signal jitter, and provide a more stable voltage signal for the single-chip microcomputer. The second filter circuit is connected to the single-chip microcomputer to further filter the output signal after the LLC circuit, thereby improving the signal quality received by the single-chip microcomputer and thus improving the data processing capability and accuracy.

[0013] Furthermore, the first filter circuit is connected to a VSET pin of the single chip microcomputer, and the first filter circuit is used to adjust an output voltage of the LLC circuit.

[0014] By connecting the first filter circuit to the VSET pin of the microcontroller, the output voltage of the LLC circuit can be precisely controlled, which helps ensure that the charger can provide a stable voltage under different load conditions and improve charging efficiency and safety. It can also increase the voltage adjustment speed and respond quickly to voltage changes, so that the microcontroller can quickly adjust the output voltage of the LLC circuit to meet different charging requirements.

[0015] Furthermore, the second filter circuit is connected to the ISET pin of the single chip microcomputer, and the second filter circuit is used to adjust the output current of the LLC circuit.

[0016] By connecting the second filter circuit to the ISET pin of the microcontroller, the output current of the LLC circuit can be precisely controlled, which helps ensure that the charger can provide stable current under different load conditions and improve charging efficiency and safety. It can also increase the current adjustment speed and quickly respond to current changes, so that the microcontroller can quickly adjust the output current of the LLC circuit to meet different charging needs.

[0017] Furthermore, the LLC circuit includes a transformer and a field effect transistor, the field effect transistor is connected to the control module and one end of the transformer respectively, and the other end of the transformer is connected to the battery.

[0018] Since the LLC circuit contains transformers and field-effect transistors, it can efficiently convert voltage, reduce energy loss, and improve overall conversion efficiency. The combined use of transformers and field-effect transistors can effectively suppress circuit interference and improve circuit stability and reliability.

[0019] Furthermore, the sampling detection module also includes a temperature detection circuit, which is connected to the transformer and is used to detect the temperature of the transformer.

[0020] By integrating the temperature detection circuit into the sampling detection module, the operating temperature of the transformer can be monitored in real time to ensure that it operates within a safe operating range and prevent damage or failure caused by overheating. The temperature detection circuit can detect abnormal transformer temperature in a timely manner. Once overheating is detected, measures can be taken immediately, such as reducing output power or disconnecting the power supply, effectively preventing potential safety risks.

[0021] Furthermore, the charging circuit includes an indicator light circuit, which is connected to the single-chip microcomputer and is used to indicate the connection status of the battery.

[0022] By integrating the indicator light circuit into the charging circuit, the battery connection status can be intuitively displayed. Users can determine whether the battery is correctly connected to the charging circuit by observing the status of the indicator light, improving the convenience of use. The indicator light circuit can provide clear visual feedback to help users confirm whether the battery has been correctly and safely connected to the charger, reducing potential risks caused by improper connection.

[0023] Furthermore, the indicator light circuit includes two LED lights, the two LED lights are respectively connected to different pins of the single chip microcomputer, and the two LED lights are powered by the same 5V voltage.

[0024] By using two LED lights to share the same 5V voltage source, the circuit design can be simplified, the required power supply and connection lines can be reduced, and the overall circuit complexity and cost can be reduced. By using two LED lights, more visual feedback can be provided to enhance the user's recognition of the charging status, especially when different states or warnings need to be distinguished.

[0025] The present application also provides a charger with Turbo, comprising: a shell with a receiving cavity formed inside, and a charging circuit of the battery charger with Turbo, which is arranged in the shell.

[0026] Compared with the prior art, the beneficial effect of the present application is that: since the charging circuit with a turbo battery charger includes a PFC circuit, an LLC circuit and a control module, by adopting the PFC circuit, the LLC circuit and the control module, the charging efficiency is effectively improved, the energy loss is reduced, and the battery can be fully charged in a shorter time, meeting people's demand for fast charging. At the same time, the charging circuit with a turbo battery charger includes an optocoupler circuit and a sampling detection module, so as to monitor the temperature changes during the charging process in real time, effectively prevent abnormal conditions such as overcharging and overheating of the battery, and reduce the risk of safety accidents of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a charging circuit with a Turbo battery charger provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a PFC circuit provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of an LLC circuit provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of an EMI filter circuit provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of a control module provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of an optocoupler circuit provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of a single chip microcomputer provided in an embodiment of the present application; and

[0034] Figure 8 A schematic diagram of a sampling detection module provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 1. PFC circuit; 2. LLC circuit; 21. Transformer; 22. Field effect transistor; 3. Control module; 4. Single chip microcomputer; 5. Optocoupler circuit; 6. EMI filter circuit; 61. Common mode inductor; 7. Sampling detection module; 71. First filter circuit; 72. Second filter circuit; 73. Temperature detection circuit; 8. Indicator light circuit; 81. LED light. DETAILED DESCRIPTION

[0037] The specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0038] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0039] It should be understood that the orientation or position relationship is based on the orientation or position relationship shown in the drawings. These orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0040] Existing battery chargers are huge in size, high in cost, and low in efficiency, resulting in very high losses and failing to meet national energy conservation and emission reduction requirements. In view of this, it is necessary to propose a new high-efficiency power supply technology solution to achieve the peak power of the device at a lower cost. The main features of Turbo charging technology are high power output and current regulation. The Turbo solution has the advantages of high efficiency and small shell size (65% smaller), and the output full load efficiency is >93.5%. The efficiency of Turbo charging is +3.5% higher than that of ordinary chargers, and it can convert AC power into power stored in the battery faster (charging time -50%). Turbo charging is safer than ordinary chargers and can effectively prevent overcharging and over-discharging. Turbo charging uses the principle of current limiting charging, which can limit the maximum current allowed by the battery during charging. Turbo charging can ensure that the battery will not be subjected to excessive stress during charging.

[0041] In order to better understand the present application, the relevant terms are explained below.

[0042] The PFC (Power Factor Correction) + LLC (Load Commutated Inverter) circuit is a power conversion technology, which is usually used in the conversion process of AC to DC, aiming to improve the power factor of the power supply, reduce harmonic distortion, and improve efficiency.

[0043] The PFC circuit is mainly used to improve the power factor of the power supply, that is, the phase difference between the current and the voltage. Ideally, the waveforms of the current and voltage are exactly the same, and the power factor is 1. However, in practical applications, due to the nonlinearity of the circuit, the current waveform may have a certain phase difference with the voltage waveform, resulting in a decrease in the power factor. The PFC circuit can achieve phase control of the input current by adding a bridge circuit and a capacitor at the input end, so that the input current and the input voltage are synchronized and the power factor is improved.

[0044] LLC is a high-efficiency DC-AC (direct current-alternating current) inverter circuit that converts DC voltage into AC voltage by controlling the on and off of the switch tube. The advantage of LLC circuit is that it can automatically adjust the switching frequency according to the change of load to maintain a high conversion efficiency. In addition, LLC circuit also has good harmonic characteristics, which can effectively reduce the harmonic components in the output current.

[0045] Combining PFC and LLC technologies together can realize a high-efficiency, high-power-factor power conversion system. The PFC circuit is used to improve the power factor of the input current and reduce the harmonic distortion at the input, while the LLC circuit is used to convert high-voltage DC to low-voltage AC while maintaining high efficiency and low harmonic distortion.

[0046] Figure 1 A schematic diagram of a charging circuit with a Turbo battery charger provided in an embodiment of the present application, Figure 2 A schematic diagram of a PFC circuit provided in an embodiment of the present application, Figure 3 A schematic diagram of an LLC circuit provided in an embodiment of the present application, Figure 4 A schematic diagram of an EMI filter circuit provided in an embodiment of the present application, Figure 5 A schematic diagram of a control module provided in an embodiment of the present application, Figure 6 A schematic diagram of an optocoupler circuit provided in an embodiment of the present application, Figure 7 A schematic diagram of a single chip microcomputer provided in an embodiment of the present application, Figure 8 A schematic diagram of a sampling detection module provided in an embodiment of the present application. Figures 1 to 8 As shown, an embodiment of the present application provides a charging circuit with a Turbo battery charger, the battery charger is used to charge a battery, the charging circuit includes a PFC circuit 1, an LLC circuit 2, a control module 3, a single-chip computer 4, an optocoupler circuit 5, an EMI filter circuit 6 and a sampling detection module 7, the single-chip computer 4 is respectively connected to the control module 3, the optocoupler circuit 5 and the sampling detection module 7, the input ends of the EMI filter circuit 6, the PFC circuit 1 and the LLC circuit 2 are connected in sequence; wherein, the output end of the LLC circuit 2 is connected to the battery, and the EMI filter circuit 6 is connected to an external power supply.

[0047] Specifically, the input ends of the EMI filter circuit 6, the PFC circuit 1 and the LLC circuit 2 are connected in sequence. The external power supply first passes through the EMI filter circuit 6 to filter out electromagnetic interference, and passes through the PFC circuit 1 to improve the power factor and make the circuit more stable. After passing through the LLC circuit 2, voltage conversion is performed to prepare for battery charging. The output end of the LLC circuit 2 is connected to the battery, so that the battery can receive the charging current from the LLC circuit 2. The single-chip microcomputer 4 is connected to the control module 3, the optical coupling circuit 5 and the sampling detection module 7 respectively. The single-chip microcomputer 4 will be responsible for controlling the entire charging process, and adjust the charging voltage and current according to the information provided by the optical coupling circuit 5 and the sampling detection module 7 to ensure the safety and efficiency of the charging process. The EMI filter circuit 6 is connected to the external power supply. While providing energy to the charging circuit, the external power supply can also be protected by the EMI filter circuit 6 to reduce electromagnetic interference. The single-chip microcomputer 4 will control the charging circuit to charge according to the preset program. During the charging process, the optical coupling circuit 5 will monitor the charging current and voltage and feed them back to the single-chip microcomputer 4. The sampling and detection module 7 is responsible for real-time detection of battery parameters such as voltage and temperature to ensure charging safety.

[0048] By adopting the PFC circuit 1, LLC circuit 2 and control module 3, the charging efficiency is effectively improved, the energy loss is reduced, and the battery can be fully charged in a shorter time, meeting people's demand for fast charging. At the same time, the optocoupler circuit 5 and sampling detection module 7 are adopted to monitor the temperature change during the charging process in real time, effectively preventing abnormal conditions such as overcharging and overheating of the battery, thereby reducing the risk of safety accidents of lithium batteries.

[0049] It should be noted that the present application adopts a PFC+LLC circuit, which can realize low power consumption to power the battery within the range of 90-264Vac input and 30%-100% rated voltage output, thereby improving power efficiency and reducing volume. At the same time, the single-chip microcomputer 4 and the sampling detection module 7 are used to detect the temperature of the internal components of the charger, and the output current is reduced when the internal components of the charger are close to the limit value. Since the single-chip microcomputer 4 is used to communicate with the load (battery), the corresponding voltage and current are output according to the communication instructions.

[0050] In some embodiments, the EMI filtering circuit 6 includes a plurality of common-mode inductors 61 , and the plurality of common-mode inductors 61 are connected in series in sequence.

[0051] Specifically, multiple common-mode inductors 61 are connected in series in sequence, and these common-mode inductors 61 will be used to suppress electromagnetic interference (EMI) and improve the electromagnetic compatibility (EMC) of the circuit. In order to improve the filtering effect, a common-mode inductor 61 with an appropriate value can be selected. The value of the common-mode inductor depends on the required filtering frequency and the rated current of the circuit. For example, different values ​​of common-mode inductors 61 can be selected. At the same time, the common-mode inductor 61 can be used in combination with other filtering elements (such as capacitors). In particular, an appropriate capacitor can be added after the common-mode inductor 61 to provide additional filtering function.

[0052] By adopting the EMI filter circuit 6 composed of multiple common-mode inductors 61, electromagnetic interference can be effectively suppressed, making the filtering effect of the EMI filter circuit 6 more significant, and enabling the charger to have better suppression capability for interference signals within a wider frequency range.

[0053] In some embodiments, the sampling detection module 7 includes a first filter circuit 71 and a second filter circuit 72 , the first filter circuit 71 and the second filter circuit 72 are connected, the first filter circuit 71 is connected to the output end of the LLC circuit 2 , and the second filter circuit 72 is connected to the single chip computer 4 .

[0054] Specifically, the first filter circuit 71 and the second filter circuit 72 are connected to realize the cascade of the two filter circuits. The first filter circuit 71 is connected to the output end of the LLC circuit 2. After the output end of the LLC circuit 2 passes through the first filter circuit 71, the noise and ripple of the output end can be reduced, and a stable signal can be provided for subsequent sampling and detection. The second filter circuit 72 is connected to the single-chip microcomputer 4, and the single-chip microcomputer 4 can receive the signal from the second filter circuit 72 for sampling and detection. Different filter elements, such as capacitors, inductors, and resistors, can be used in the first filter circuit 71 and the second filter circuit 72 to achieve different filtering characteristics. For example, the first filter circuit 71 can use larger values ​​of inductors and capacitors to reduce high-frequency noise; the second filter circuit 72 can use smaller values ​​of inductors and capacitors to reduce low-frequency ripples.

[0055] Since the first filter circuit 71 is connected to the output end of the LLC circuit 2, it can filter the voltage signal at the output end of the charger, reduce signal jitter, and provide a more stable voltage signal for the single-chip microcomputer 4. The second filter circuit 72 is connected to the single-chip microcomputer 4, and further filters the output signal after the LLC circuit 2, thereby improving the signal quality received by the single-chip microcomputer 4, thereby improving the data processing capability and accuracy.

[0056] In some embodiments, the first filter circuit 71 is connected to the VSET pin of the single chip computer 4 , and the first filter circuit 71 is used to adjust the output voltage of the LLC circuit 2 .

[0057] Specifically, the first filter circuit 71 is connected to the VSET pin of the single chip microcomputer 4, and the single chip microcomputer 4 can send a control signal to the first filter circuit 71 through the VSET pin. The first filter circuit 71 is used to adjust the output voltage of the LLC circuit 2. According to the control signal sent by the single chip microcomputer 4, the first filter circuit 71 can adjust the parameters of the adjustable components inside it, thereby adjusting the output voltage of the LLC circuit 2. For example, when the single chip microcomputer 4 sends a higher control signal, the output voltage of the LLC circuit 2 increases. The first filter circuit 71 can also include a feedback mechanism for feeding back the output voltage of the LLC circuit 2 to the single chip microcomputer 4. The single chip microcomputer 4 can adjust the control signal according to the feedback signal to achieve precise control of the output voltage of the LLC circuit 2.

[0058] By connecting the first filter circuit 71 to the VSET pin of the single-chip microcomputer 4, the output voltage of the LLC circuit 2 can be precisely controlled, which helps to ensure that the charger can provide a stable voltage under different load conditions and improve charging efficiency and safety. It can also increase the voltage adjustment speed and quickly respond to voltage changes, so that the single-chip microcomputer 4 can quickly adjust the output voltage of the LLC circuit 2 to meet different charging requirements.

[0059] In some embodiments, the second filter circuit 72 is connected to the ISET pin of the single chip microcomputer 4 , and the second filter circuit 62 is used to adjust the output current of the LLC circuit 2 .

[0060] Specifically, the second filter circuit 72 is connected to the ISET pin of the single-chip microcomputer 4, and the single-chip microcomputer 4 can send a control signal to the second filter circuit 72 through the ISET pin. The second filter circuit 72 is used to adjust the output current of the LLC circuit 2, and the second filter circuit 72 may include multiple capacitors or inductors. According to the control signal sent by the single-chip microcomputer 4, the second filter circuit 72 can adjust the parameters of its internal components to adjust the output current of the LLC circuit 2. For example, when the single-chip microcomputer 4 sends a higher control signal, the second filter circuit 72 can increase the capacity of the capacitor to reduce the output current of the LLC circuit 2. The second filter circuit 72 may also include a feedback mechanism for feeding back the output current of the LLC circuit 2 to the single-chip microcomputer 4, and the single-chip microcomputer 4 may adjust the control signal according to the feedback signal to achieve precise control of the output current of the LLC circuit 2.

[0061] By connecting the second filter circuit 72 to the ISET pin of the single-chip microcomputer 4, the output current of the LLC circuit 2 can be precisely controlled, which helps to ensure that the charger can provide a stable current under different load conditions, improve charging efficiency and safety. It can also improve the current adjustment speed and quickly respond to current changes, so that the single-chip microcomputer 4 can quickly adjust the output current of the LLC circuit 2 to meet different charging requirements.

[0062] In some embodiments, the LLC circuit 2 includes a transformer 21 and a field effect transistor 22 , the field effect transistor 22 is connected to the control module 3 and one end of the transformer 21 , respectively, and the other end of the transformer 21 is connected to the battery.

[0063] Specifically, the transformer 21 and the field effect tube 22 constitute the core part of the LLC circuit. The transformer 21 is used to realize voltage conversion, converting the input voltage into a voltage suitable for the operation of the field effect tube 22. The field effect tube 22 adjusts the switch state according to the signal of the control module 3 to control the output voltage and current. One end of the field effect tube 22 is connected to the control module 3. The control module 3 can generate a PWM (pulse width modulation) signal to adjust the conduction time and cut-off time of the field effect tube 22, thereby realizing the control of the output voltage and current.

[0064] Since the LLC circuit 2 includes a transformer 21 and a field effect transistor 22, it can efficiently convert voltage, reduce energy loss, and improve overall conversion efficiency. The combined use of the transformer 21 and the field effect transistor 22 can effectively suppress circuit interference and improve circuit stability and reliability.

[0065] In some embodiments, the sampling detection module 7 further includes a temperature detection circuit 73 . The temperature detection circuit 73 is connected to the transformer 21 . The temperature detection circuit 73 is used to detect the temperature of the transformer 21 .

[0066] Specifically, the temperature detection circuit 73 is connected to the transformer 21 so as to monitor the temperature of the transformer 21. The connection method can be through physical contact, for example, the temperature sensing element of the temperature detection circuit 73 is placed close to the surface of the transformer 21. The temperature detection circuit 73 can be implemented by various temperature sensors, such as thermocouples, thermistors or infrared sensors. A suitable temperature sensor is selected to ensure that the temperature of the transformer 21 can be accurately detected. The temperature detection circuit 73 converts the detected temperature signal into an electrical signal, which can be an analog-to-digital converter (ADC) to convert the analog signal of the temperature sensor into a digital signal, which is convenient for subsequent processing and analysis. 5. The converted temperature electrical signal is transmitted to the sampling detection module 7, and the sampling detection module 7 can process the temperature signal, such as filtering, amplification, etc., to improve the accuracy and stability of the signal.

[0067] By integrating the temperature detection circuit 73 into the sampling detection module 7, the operating temperature of the transformer 21 can be monitored in real time to ensure that it operates within a safe operating range and prevent damage or failure caused by overheating. The temperature detection circuit 73 can detect abnormal temperature of the transformer 21 in time. Once overheating is detected, measures can be taken immediately, such as reducing output power or disconnecting the power supply, to effectively prevent potential safety risks.

[0068] In some embodiments, the charging circuit includes an indicator light circuit 8, which is connected to the single-chip computer 4 and is used to indicate the access status of the battery.

[0069] Specifically, the indicator light circuit 8 is connected to the single-chip microcomputer 4 so that the single-chip microcomputer 4 can control the on and off of the indicator light circuit 8 to indicate the access status of the battery. The connection method can connect the indicator light circuit 8 to the output end of the single-chip microcomputer 4 through a wire. The indicator light circuit 8 may include one or more indicator lights, such as LED lights. Indicator lights of different colors, such as red, green or yellow, can be selected as needed to distinguish different battery access states. The single-chip microcomputer 4 controls the on and off of the indicator light by controlling the power supply of the indicator light circuit 8. When the battery is connected, the single-chip microcomputer 4 outputs a high-level signal to the indicator light circuit 8 to turn on the indicator light; when the battery is not connected, the single-chip microcomputer 4 outputs a low-level signal to the indicator light circuit 8 to turn off the indicator light. In addition to indicating the access status of the battery, the indicator light circuit 8 can also be used to indicate other information, such as charging status, full state, etc. By programming the single-chip microcomputer 4, the on and off or color of the indicator light can be switched according to different states.

[0070] By integrating the indicator light circuit 8 into the charging circuit, the connection status of the battery can be intuitively displayed. The user can judge whether the battery is correctly connected to the charging circuit by observing the status of the indicator light, thereby improving the convenience of use. The indicator light circuit 8 can provide clear visual feedback to help the user confirm whether the battery has been correctly and safely connected to the charger, thereby reducing potential risks caused by improper connection.

[0071] In some embodiments, the indicator light circuit 8 includes two LED lights 81 , the two LED lights 81 are respectively connected to different pins of the single chip computer 4 , and the two LED lights 81 are powered by the same 5V voltage.

[0072] Specifically, the two LED lamps 81 are respectively connected to different pins of the single-chip microcomputer 4. The connection method can be to connect one terminal of each LED lamp 81 to a pin of the single-chip microcomputer 4 through a wire, and the other terminal is connected to a 5V voltage source. The two LED lamps 81 can draw power from the same 5V voltage, which represents sharing the same power supply voltage. The single-chip microcomputer 4 can control the on and off of the two LED lamps 81 by controlling the level of the pin. When a pin of the single-chip microcomputer 4 outputs a high level, the LED lamp 81 connected to the pin will light up; when a pin of the single-chip microcomputer 4 outputs a low level, the LED lamp 81 connected to the pin will go out.

[0073] By using two LED lights 81 to share the same 5V voltage source, the circuit design can be simplified, the required power supply and connection lines can be reduced, and the complexity and cost of the overall circuit can be reduced. By using two LED lights 81, more visual feedback can be provided to enhance the user's recognition of the charging status, especially when it is necessary to distinguish different states or warnings.

[0074] In order to better understand the charging circuit of the embodiment of the present application, its working principle is described in detail below.

[0075] The external power supply is powered on, outputs the default voltage and current, and supplies power to the single-chip microcomputer 4. After the power supply is powered on, the load (battery) is connected, and communication is carried out with the load through the COM line. The TX pin of the single-chip microcomputer 4 sends a heartbeat signal to turn on the optocoupler circuit 5. When the load is connected, the COM line voltage will be pulled down and RX will become a high level of 5V. The single-chip microcomputer 4 uses this to determine that the load is connected and sends normal communication data.

[0076] The single chip computer 4 changes the output voltage and current according to the communication data with the load. By changing the duty cycle of the VSET signal PWM waveform, it is filtered into a DC voltage through RC, and then passes through a resistor and an inductor to change the sampling voltage and modify the output voltage. By changing the duty cycle of the ISET signal PWM waveform, it is filtered into a DC voltage through RC (resistance, inductance), and changing the pin voltage of the sampling detection module 7, the output current is modified.

[0077] The single chip microcomputer 4 detects the temperature of the transformer 21 inside the charger through the temperature detection circuit 73, and reduces the output current when the temperature approaches the device limit value of 105°C, and restores the communication current when 75°C is detected.

[0078] The embodiment of the present application further provides a charger with Turbo, comprising: a housing having a receiving cavity formed therein, and a charging circuit of any of the above-mentioned battery chargers with Turbo, arranged in the housing,

[0079] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the same. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present application.

Claims

1. A charging circuit with a turbo battery charger, the battery charger is used to charge a battery, characterized in that: The charging circuit includes: a PFC circuit, an LLC circuit, a control module, a single-chip microcomputer, an optocoupler circuit, an EMI filter circuit and a sampling detection module, wherein the single-chip microcomputer is respectively connected to the control module, the optocoupler circuit and the sampling detection module, and the input ends of the EMI filter circuit, the PFC circuit and the LLC circuit are connected in sequence; wherein the output end of the LLC circuit is connected to the battery, and the EMI filter circuit is connected to an external power supply.

2. A charging circuit with a turbo battery charger according to claim 1, characterized in that: The EMI filtering circuit includes a plurality of common-mode inductors, and the plurality of common-mode inductors are connected in series in sequence.

3. A charging circuit with a turbo battery charger according to claim 1, characterized in that: The sampling detection module includes a first filter circuit and a second filter circuit, the first filter circuit and the second filter circuit are connected, the first filter circuit is connected to the output end of the LLC circuit, and the second filter circuit is connected to the single chip microcomputer.

4. A charging circuit with a turbo battery charger according to claim 3, characterized in that: The first filter circuit is connected to the VSET pin of the single chip microcomputer, and the first filter circuit is used to adjust the output voltage of the LLC circuit.

5. A charging circuit with a turbo battery charger according to claim 3, characterized in that: The second filter circuit is connected to the ISET pin of the single chip microcomputer, and the second filter circuit is used to adjust the output current of the LLC circuit.

6. A charging circuit with a turbo battery charger according to claim 1, characterized in that: The LLC circuit includes a transformer and a field effect transistor. The field effect transistor is connected to the control module and one end of the transformer respectively. The other end of the transformer is connected to the battery.

7. A charging circuit with a turbo battery charger according to claim 6, characterized in that: The sampling detection module also includes a temperature detection circuit, which is connected to the transformer and is used to detect the temperature of the transformer.

8. A charging circuit with a turbo battery charger according to claim 1, characterized in that: The charging circuit comprises an indicator light circuit, which is connected to the single-chip microcomputer and is used to indicate the access status of the storage battery.

9. A charging circuit with a turbo battery charger according to claim 8, characterized in that: The indicator light circuit includes two LED lights, the two LED lights are respectively connected to different pins of the single chip microcomputer, and the two LED lights are powered by the same 5V voltage.

10. A charger with Turbo, characterized in that: include: A shell having a receiving cavity formed therein, and a charging circuit with a turbo battery charger as claimed in any one of claims 1 to 9, are arranged in the shell.

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