Charger capable of charging safely

Abstract

The utility model belongs to the technical field of chargers, and particularly relates to a safe-charging charger, which comprises a shell, the shell is in the shape of a rectangle with arc corners, heat dissipation grooves are arranged on four sides of the shell, a plug is fixedly connected to the right end of the shell, a wiring port is arranged at the left end of the shell, and a power supply is arranged on the wiring port. Grooves are symmetrically and integrally formed in the left end of the shell, and heat dissipation holes are completely formed in the inner walls of the grooves. According to the utility model, the housing is unique in design, the heat dissipation groove is heat-dissipation and anti-skid, the dustproof net is dustproof, the internal elements work cooperatively, the power management chip accurately adapts to a fast charging protocol, voltage and current are adjusted, and various protection modules, such as a voltage detection module and an overheat protection module, can monitor abnormity in real time and guarantee charging safety. The transformer, the rectifier diode and the filter capacitor stably convert and process electric energy, and on the whole, efficient charging is achieved, the service life of the battery is prolonged, potential safety hazards are reduced, and the charging experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of charger technology, specifically a charger with charging safety. Background Technology

[0002] With the widespread use of smartphones in people's daily lives, the safety and performance of mobile phone chargers, as key accessories to ensure the continuous operation of mobile phones, have attracted much attention.

[0003] In the past, traditional mobile phone chargers had limited functionality, providing only basic power output to meet the charging needs of mobile phones. However, with the rapid development of smartphone technology and the continuous increase in mobile phone battery capacity, fast charging technology emerged. Early fast charging solutions lacked a unified standard, and different brands of mobile phones used different fast charging protocols. This made compatibility between chargers and mobile phones a major problem. Users often faced the frustration of buying a new charger but not being able to achieve fast charging, and might even damage their mobile phone batteries due to protocol incompatibility.

[0004] At the same time, the safety hazards of mobile phone chargers are gradually becoming apparent. Because chargers need to be powered on for extended periods, their internal electronic components generate heat during operation. If heat dissipation is inadequate, heat buildup can lead to component aging, damage, and even serious accidents such as fires. Furthermore, the daily usage environment is complex and variable, with frequent fluctuations in mains voltage, which can cause chargers to experience overvoltage and overcurrent. In addition, lightning strikes during thunderstorms and accidental foreign objects entering the charger interface pose serious challenges to charger safety.

[0005] To address these issues, the industry is constantly exploring and innovating. This is to ensure chargers operate stably for extended periods and meet the growing demand for safe and efficient mobile phone charging. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the shortcomings of the prior art, this utility model provides a charger with safe charging, which solves the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0010] A safe charger includes a housing shaped like a rectangle with rounded corners. The housing has heat dissipation grooves on all four sides. A plug is fixedly connected to the right end of the housing, and a wiring port is located at the left end. A groove is integrally formed with symmetrical features on the left end of the housing, with heat dissipation holes formed along its inner wall. A dustproof mesh covers the inner sidewall of the groove. A circuit board is mounted inside the housing via positioning posts. One end of the circuit board is connected to the plug, and the other end is connected to the wiring port. A power management chip is mounted on the circuit board. A transformer, rectifier diodes, and filter capacitors are also mounted on the circuit board. Additionally, a voltage detection module, a current sensor, an overheat protection module, a short-circuit protection circuit module, and a lightning protection module are also mounted on the circuit board.

[0011] Furthermore, the heat dissipation slots are distributed in an equally spaced array, which serves two purposes: firstly, to form heat dissipation fins, and secondly, to provide an anti-slip function.

[0012] Furthermore, the dustproof mesh completely covers the heat dissipation holes.

[0013] Furthermore, the power management chip is model SW6306V.

[0014] Furthermore, the transformer is a high-frequency switching transformer, specifically the Shunluo Electronics SRP series.

[0015] Furthermore, the rectifier diode is a Schottky diode.

[0016] Furthermore, the filter capacitor is selected as a combination of multilayer ceramic capacitor and electrolytic capacitor.

[0017] Furthermore, the specific model selected for the voltage detection module is LTC2990.

[0018] Furthermore, the current sensor is a closed-loop Hall current sensor; the specific model of the overheat protection module is LM358.

[0019] Furthermore, the short-circuit protection circuit module uses a high-speed fuse; the lightning protection module is equipped with a multi-level lightning protection system consisting of a professional gas discharge tube, a varistor, and a transient voltage suppressor diode (TVS).

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, this utility model provides a charger with safe charging capabilities, which has the following advantages:

[0022] This utility model features a uniquely designed outer shell with heat dissipation grooves that provide both heat dissipation and anti-slip properties, a dustproof mesh that prevents dust accumulation, and internal components that work in tandem. The power management chip is precisely adapted to fast charging protocols to regulate voltage and current. Multiple protection modules, such as a voltage detection module and an overheat protection module, can monitor anomalies in real time to ensure charging safety. The transformer, rectifier diodes, and filter capacitors stably convert and process electrical energy. Overall, it achieves efficient charging, extends battery life, reduces safety hazards, and enhances the user's charging experience. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal installation structure of the outer shell of this utility model;

[0025] Figure 3 This is a schematic diagram of the system principle of this utility model.

[0026] In the diagram: 1. Outer casing; 2. Heat sink; 3. Plug; 4. Wiring port; 5. Groove; 6. Heat dissipation hole; 7. Dust filter; 8. Positioning post; 9. Circuit board; 10. Power management chip; 11. Transformer; 12. Rectifier diode; 13. Filter capacitor; 14. Voltage detection module; 15. Current sensor; 16. Overheat protection module; 17. Short circuit protection circuit module; 18. Lightning protection module. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example

[0029] like Figure 1 As shown, an embodiment of the present invention provides a safe charger, including a housing 1, wherein the housing 1 is a rectangle with rounded corners;

[0030] The outer casing 1 serves as the external protective structure for the entire charger. The plug 3 is fixedly connected to its right end, the wiring port 4 is located at the left end, and the circuit board 9 is positioned and installed inside by the positioning post 8.

[0031] It protects the internal electronic components of the charger from external physical damage and corrosion from dust, moisture, etc. Its rounded rectangular design is both ergonomic and easy to hold, and avoids potential injury from sharp edges.

[0032] like Figure 1 As shown, the heat dissipation slots 2 are evenly distributed on the four sides of the outer shell 1.

[0033] On the one hand, it forms heat dissipation fins, increasing the heat dissipation area of ​​the outer shell 1, which helps dissipate heat inside the charger and reduce the operating temperature of internal components; on the other hand, it plays an anti-slip role, making it easier for users to hold the charger when plugging and unplugging it.

[0034] like Figure 1 As shown, plug 3 is fixedly connected to the right end of housing 1 and connected to one end of circuit board 9.

[0035] Used to plug into a power outlet, it brings AC power into the charger and provides power input for the entire charging process.

[0036] like Figure 1 As shown, the wiring port 4 is located at the left end of the housing 1 and is connected to the other end of the circuit board 9.

[0037] By connecting the phone to the charging device via a charging cable, the device outputs processed and stable electrical energy to achieve the charging function.

[0038] like Figure 1 As shown, the groove 5 is symmetrically and integrally formed on the left end of the outer shell 1.

[0039] It provides installation positions for heat dissipation holes 6 and dustproof mesh 7, and also plays a certain protective role in preventing external objects from directly blocking heat dissipation holes 6.

[0040] like Figure 1 As shown, the heat dissipation hole 6 is opened on the inner wall of the groove 5.

[0041] These holes allow heat inside the charger to exchange with the outside air, further improving heat dissipation efficiency and ensuring that the internal components of the charger operate within a suitable temperature range.

[0042] like Figure 1 As shown, the dustproof mesh 7 covers the inner wall of the groove 5 and completely covers the heat dissipation holes 6.

[0043] While ensuring heat dissipation, it prevents dust, hair and other debris from entering the charger through the heat dissipation hole 6, avoiding the impact of dust accumulation on component performance or causing short circuits and other malfunctions.

[0044] like Figure 2 As shown, the positioning post 8 is located inside the outer casing 1 and is used to position and install the circuit board 9.

[0045] Ensure the accurate position of circuit board 9 within housing 1 to prevent it from shaking or shifting during use, and to guarantee the stability and reliability of the connections between components.

[0046] like Figure 2 As shown, one end of the circuit board 9 is connected to the plug 3, and the other end is connected to the wiring port 4. It is equipped with components such as a power management chip 10, a transformer 11, a rectifier diode 12, a filter capacitor 13, a voltage detection module 14, a current sensor 15, an overheat protection module 16, a short circuit protection circuit module 17, and a lightning protection module 18.

[0047] As a carrier for various electronic components, it provides them with electrical connection channels, enabling the components to work together to complete the entire charging process from mains power input to outputting stable power to devices such as mobile phones.

[0048] like Figure 2 As shown, the power management chip 10 is mounted on the circuit board 9 and is connected to components such as the transformer 11, rectifier diode 12, filter capacitor 13, voltage detection module 14, and current sensor 15 through circuits.

[0049] The power management chip 10, SW6306V, is a power management chip used in chargers. It has many advanced features that greatly improve the performance and safety of the charger. The chip supports many mainstream fast charging protocols on the market, such as UFCS converged fast charging standard, PD3.1, SCP, FCP, AFC, QC3+, and BC1.2, and also supports the VOOC fast charging protocol.

[0050] It is the core control component of the charger, capable of accurately identifying the fast charging protocols of mainstream mobile phones on the market and automatically adapting to the optimal charging voltage and current. At the same time, based on the information fed back by the voltage detection module 14 and the current sensor 15, it adjusts the output voltage and current in real time to ensure that the charging process is both efficient and safe, and can also maximize the extension of battery life.

[0051] like Figure 2 As shown, transformer 11 is mounted on circuit board 9, with its input end connected to the AC power introduced by plug 3 and its output end connected to rectifier diode 12.

[0052] Transformer 11 uses a Shunluo Electronics SRP series high-frequency switching transformer, providing strong support for the stable operation and efficient charging of the charger. High-efficiency voltage conversion: The Shunluo Electronics SRP series high-frequency switching transformer uses a new type of iron core material with high magnetic permeability and low loss. Under high-frequency switching conditions, the conversion efficiency can reach over 90%. It can quickly convert the input mains voltage into stable low-voltage AC power, meeting the voltage requirements for mobile phone charging.

[0053] It converts the input high-voltage mains power into low-voltage AC power suitable for charging mobile phones, providing a suitable voltage input for subsequent rectification and filtering processes;

[0054] like Figure 2 As shown, the rectifier diode 12 is mounted on the circuit board 9, with its input terminal connected to the output terminal of the transformer 11 and its output terminal connected to the filter capacitor 13.

[0055] The rectifier diode 12 is a Schottky diode; Schottky diodes are characterized by low forward conduction voltage, typically between 0.2-0.4V, resulting in lower energy loss during conduction compared to traditional diodes. In the charger, this means reduced energy waste and improved rectification efficiency during the conversion of AC power output from transformer 11 to DC power.

[0056] The AC power output from transformer 11 is converted into DC power because the mobile phone battery needs DC power to be charged.

[0057] like Figure 2 As shown, the filter capacitor 13 is mounted on the circuit board 9 and connected to the output terminal of the rectifier diode 12;

[0058] The filter capacitor 13 uses a combination of multilayer ceramic capacitors and electrolytic capacitors. Multilayer ceramic capacitors are characterized by good high-frequency characteristics and low equivalent series resistance, effectively filtering out high-frequency ripple. During charger operation, various high-frequency interference signals are generated. If these signals are not filtered out, they will affect the charging stability and the lifespan of the phone battery. Multilayer ceramic capacitors can quickly respond to changes in high-frequency signals, bypassing high-frequency ripple to ground, resulting in a cleaner output DC voltage. Electrolytic capacitors, with their large capacitance, perform excellently in low-frequency filtering. They can store a large amount of charge, effectively smoothing low-frequency voltage fluctuations. In the charger's DC output, there are some low-frequency ripple components. Electrolytic capacitors can utilize their large capacitance to absorb and release these low-frequency ripples, making the output voltage more stable. Combining both allows for voltage filtering across the entire frequency range, ensuring a stable and clean DC voltage output from the charger.

[0059] The rectified DC power is filtered to smooth voltage fluctuations, making the output DC voltage more stable and reducing the impact of voltage ripple on the mobile phone battery and other circuit components.

[0060] like Figure 3 As shown, the voltage detection module 14 is mounted on the circuit board 9 and is connected to the output terminal of the power management chip 10 and the terminal 4 via a circuit.

[0061] The LTC2990 is selected as the voltage detection module 14. The LTC2990 boasts extremely high voltage detection accuracy, reaching ±0.05V, enabling the charger to monitor the output voltage accurately in real time. Voltage stability is crucial during mobile phone charging; even minute voltage fluctuations can damage the battery. The LTC2990 can precisely detect these subtle changes and promptly feed them back to the power management chip 10. This ensures that the power management chip 10 accurately adjusts the voltage based on the actual situation, maintaining a stable charging voltage and effectively preventing the adverse effects of overvoltage or undervoltage on the battery, such as bulging and leakage, thus extending battery life.

[0062] The charger's output voltage is monitored in real time and accurately. Once the voltage deviates from the preset safe range, an interrupt signal is immediately sent to the power management chip 10 to trigger the protection mechanism and prevent irreversible damage to the mobile phone battery due to abnormal voltage.

[0063] like Figure 3 As shown, the current sensor 15 is mounted on the circuit board 9, connected in series in the charging circuit, and connected to the power management chip 10.

[0064] Using a closed-loop Hall current sensor as the current sensor 15 in the charger can provide accurate and reliable current monitoring during the charging process, ensuring charging safety and stability.

[0065] The charging current is monitored in real time. When an abnormal current is detected, information is fed back to the power management chip 10 so that corresponding protection measures can be taken to avoid damage to the mobile phone and charger due to overcurrent.

[0066] like Figure 3 As shown, the overheat protection module 16 is mounted on the circuit board 9. Its multiple built-in high-precision temperature sensors are distributed in key parts such as the circuit board 9, transformer 11, and power management chip 10, and are connected to the power management chip 10.

[0067] The LM358 was selected as the overheat protection module 16, which can effectively monitor the temperature of key parts of the charger and prevent safety problems caused by overheating.

[0068] The charger monitors the temperature of key components in all directions. When the temperature of any part exceeds the set safety threshold, it will quickly send a signal to the power management chip 10 to reduce the charger's output power and slow down the heating rate.

[0069] like Figure 3 As shown, the short-circuit protection circuit module 17 is mounted on the circuit board 9, connected to the charging circuit, and communicates with the power management chip 10.

[0070] Using a high-speed fuse as a short-circuit protection circuit module 17 in the charger can provide reliable short-circuit protection for the charger and connected devices, avoiding safety issues caused by short-circuit faults.

[0071] It monitors the status of the charging circuit in real time, and can cut off the power output in a very short time once a short circuit is detected, preventing excessive current from causing serious damage to the charger and mobile phone.

[0072] like Figure 3 As shown, the lightning protection module 18 is mounted on the circuit board 9 and connected between the plug 3 and the transformer 11;

[0073] The surge protection module 18 is equipped with a multi-level surge protection system consisting of a gas discharge tube, a varistor, and a transient voltage suppressor diode (TVS), which can provide all-round surge protection for the charger and resist instantaneous high voltage impacts such as lightning strikes.

[0074] When encountering instantaneous high-voltage surges such as lightning strikes, the charger's multi-level lightning protection system, consisting of a gas discharge tube, a varistor, and a transient suppression diode, quickly discharges excessive current and voltage to the ground, protecting the charger's internal electronic components from lightning damage.

[0075] When the charger is working, plug 3 is connected to AC power, introducing AC power. Current flows through plug 3 into circuit board 9, where transformer 11 converts the high-voltage AC power to a low-voltage AC power suitable for charging mobile phones. Next, rectifier diode 12 converts the AC power to DC power, which is then filtered by filter capacitor 13 to obtain stable DC power. At this point, power management chip 10 plays a crucial role, precisely regulating the output voltage and current based on the phone type and battery status, charging the phone through connector 4. During charging, voltage detection module 14 monitors the output voltage in real time, and current sensor 15 monitors the current. If any voltage or current abnormality occurs, a signal is transmitted to power management chip 10, triggering the protection mechanism. Simultaneously, overheat protection module 16 monitors the temperature of circuit board 9, transformer 11, power management chip 10, and other components, activating protection when the temperature is too high. Short circuit protection module 17 constantly monitors the circuit and immediately cuts off the current in case of a short circuit. Lightning protection module 18 protects the internal circuitry from lightning strikes during thunderstorms. In addition, the heat dissipation grooves 2, heat dissipation holes 6 and dustproof mesh 7 on the outer casing 1 work together to accelerate heat dissipation, and the dustproof mesh 7 prevents dust from entering, ensuring stable operation of the charger.

[0076] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A charger with charging safety, comprising a housing (1), characterized in that: The outer shell (1) is a rectangle with rounded corners. Heat dissipation grooves (2) are provided on the four sides of the outer shell (1). A plug (3) is fixedly connected to the right end of the outer shell (1). A wiring port (4) is provided on the left end of the outer shell (1). A groove (5) is integrally formed symmetrically on the left end of the outer shell (1). Heat dissipation holes (6) are opened on the inner wall of the groove (5). A dustproof mesh (7) is covered on the inner side wall of the groove (5). A circuit board (9) is installed inside the outer shell (1) by positioning pins (8). One end of the circuit board (9) is connected to the plug (3), and the other end is connected to the wiring port (4). A power management chip (10) is installed on the circuit board (9). A transformer (11), a rectifier diode (12), and a filter capacitor (13) are installed on the circuit board (9). At the same time, a voltage detection module (14), a current sensor (15), an overheat protection module (16), a short circuit protection circuit module (17), and a lightning protection module (18) are installed on the circuit board (9).

2. A charger with charging safety according to claim 1, characterized in that: The heat dissipation grooves (2) are distributed in an array at equal intervals, which serves two purposes: firstly, to form heat dissipation fins, and secondly, to provide anti-slip function.

3. A charger with charging safety according to claim 1, characterized in that: The dustproof net (7) completely covers the heat dissipation holes (6).

4. A charger with charging safety according to claim 1, characterized in that: The power management chip (10) is model SW6306V.

5. A charger with charging safety according to claim 1, characterized in that: The transformer (11) is a high-frequency switching transformer, and its model is Shunluo Electronics SRP series.

6. A charger with charging safety according to claim 1, characterized in that: The rectifier diode (12) is a Schottky diode.

7. A charger with charging safety according to claim 1, characterized in that: The filter capacitor (13) is a combination of multilayer ceramic capacitor and electrolytic capacitor.

8. A charger with charging safety according to claim 1, characterized in that: The specific model selected for the voltage detection module (14) is LTC2990.

9. A charger with charging safety according to claim 1, characterized in that: The current sensor (15) is a closed-loop Hall current sensor; the overheat protection module (16) is specifically model LM358.

10. A charger with charging safety according to claim 1, characterized in that: The short-circuit protection circuit module (17) uses a high-speed fuse; the lightning protection module (18) is equipped with a multi-level lightning protection system consisting of a professional gas discharge tube, a varistor and a transient suppression diode.

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