Wireless low energy charger
By combining a heat-conducting plate and an active heat dissipation component, the heat generation problem of the wireless charger is solved, achieving low power consumption and efficient heat dissipation, ensuring stable charger temperature, and improving charging efficiency.
Patent Information
- Application Number
- CN202521690224.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-11
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-11
AI Technical Summary
Existing wireless chargers have significant heat generation issues, leading to increased energy consumption and longer charging times, which traditional heat dissipation structures cannot effectively address.
It adopts a heat-conducting plate and active heat dissipation component design, including heat-conducting rings and blades, and utilizes the high thermal conductivity of brass and the active heat dissipation airflow path to achieve rapid heat conduction and diffusion.
Effectively control the charger temperature below 40℃ to reduce energy consumption during inefficient charging phases, avoid overheating and reduce output power, and improve charging efficiency.
Smart Images
Figure CN224683909U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wireless charger technology, specifically a wireless low-power charger. Background Technology
[0002] With the widespread adoption of smart terminal devices, wireless charging technology has become one of the mainstream charging methods due to its advantages such as eliminating the need for physical interfaces and ease of use. Currently, wireless chargers mainly achieve energy transfer based on the principle of electromagnetic induction. Their core structure includes components such as a transmitting coil, a receiving coil, a control circuit, and a casing. The transmitting coil generates an alternating magnetic field, which the receiving coil senses and converts into electrical energy, thereby powering the device.
[0003] However, existing wireless chargers suffer from significant heat generation issues in practical applications, which further increases energy consumption and hinders technological optimization and upgrades. Specifically, insufficient energy transfer efficiency leads to heat loss. The coupling efficiency between the transmitting and receiving coils is a key factor affecting energy transfer. Traditional wireless chargers often use a circular structure wound with a single strand of wire. Under high-frequency alternating current, this structure is prone to significant coil losses due to the skin effect and proximity effect. Simultaneously, leakage magnetic losses due to the diffusion of the magnetic field into non-target areas are also prominent. These losses are all released as heat, causing the charger temperature to rise.
[0004] Most wireless chargers use enclosed or simple heat dissipation shells, which make it difficult to quickly dissipate the heat generated by the inductor coil and power devices. When the temperature exceeds the threshold, the control circuit will trigger overheat protection and reduce the output power to avoid damage. This prolongs the charging time, and long-term operation will accumulate more standby loss and inefficient transmission loss, further increasing the total energy consumption. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a wireless low-power charger, which solves the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a wireless low-power charger, comprising a wireless charger body and a heat dissipation component;
[0007] The heat dissipation component is located below the wireless charger body. The heat dissipation component includes a heat-conducting plate installed on the lower surface of the wireless charger body, and at least four side ears are provided on the outer side of the heat-conducting plate.
[0008] The heat dissipation component is detachably mounted on the lower surface of the side ear;
[0009] The heat-conducting plate includes multiple heat-conducting rings, all of which are attached to the lower surface of the wireless charger body, and heat dissipation holes are provided on the outer side of each heat-conducting ring.
[0010] Furthermore, the diameters of the plurality of heat-conducting rings increase sequentially from the inside out, and the centers of the plurality of heat-conducting rings are all located on the same vertical line.
[0011] Furthermore, a connecting plate is fitted between each of the two adjacent heat-conducting rings to increase the heat-conducting area with the wireless charger body.
[0012] Furthermore, the connecting plate has connecting holes inside.
[0013] Furthermore, both the connecting plate and the heat-conducting ring are made of brass.
[0014] Furthermore, the heat dissipation assembly includes a housing, a bracket, a motor, and blades;
[0015] The outer casing is detachably connected to the side lug by bolts, the bracket is fixed to the inner peripheral wall of the outer casing, the motor is mounted on the bracket, and the blade drive is connected to the output end of the motor.
[0016] Furthermore, the lower end face of the outer shell is provided with four arc-shaped grooves for drainage.
[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0018] This wireless low-energy charger features a multi-ring design for its heat-conducting plate combined with brass material, which effectively increases the heat conduction area. Furthermore, the active heat dissipation airflow path design ensures that the temperature of the wireless charger body remains stable below 40°C, avoiding prolonged charging time due to overheating and power reduction, and reducing energy consumption during inefficient charging phases. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of this utility model from below;
[0021] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;
[0022] Figure 4 This is a schematic diagram of the heat-conducting plate structure of this utility model.
[0023] In the diagram: 1. Wireless charger main body; 2. Heat dissipation component; 201. Shell; 202. Stand; 203. Motor; 204. Blade; 3. Heat conduction plate; 301. Heat conduction ring; 302. Connecting plate; 4. Side ear. Detailed Implementation
[0024] 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.
[0025] Please see Figure 1-4 The wireless low-power charger in this embodiment includes a wireless charger body 1 and a heat dissipation component 2. The two are combined through a detachable structure to form a synergistic design of efficient heat dissipation and low power consumption.
[0026] In detail, the wireless charger body 1 is the core functional module of traditional wireless charging, with built-in components such as transmitting coil and control circuit, responsible for generating alternating magnetic field and realizing energy transfer.
[0027] The heat dissipation component 2 is installed on the lower surface of the wireless charger body 1. It includes a heat conduction plate 3, a side ear 4, a shell 201, a bracket 202, a motor 203, and blades 204. The heat conduction plate 3 is in direct contact with the wireless charger body 1, and the shell 201 is fixed to the side ear 4 by bolts to form a closed heat dissipation channel.
[0028] In actual setup, the outer shell 201 is a rectangular shell, which is detachably connected to the side lug 4 by bolts. Four arc-shaped grooves are opened on its lower end face to serve as air outlets. The bracket 202 is welded to the inner circumferential wall of the outer shell 201 to fix the motor 203. The motor 203 is bolted to the center position of the bracket 202. The output shaft and the blade 204 are connected by a coupling. The blade 204 is located in the cavity between the heat-conducting plate 3 and the outer shell 201.
[0029] The heat-conducting plate 3 is attached to the lower surface of the wireless charger body 1 and is made of brass. Its structure consists of multiple heat-conducting rings 301 with increasing diameter. Adjacent heat-conducting rings 301 are fixed by connecting plates 302, and the centers of all heat-conducting rings 301 are located on the same vertical line. Four side ears 4 are integrally formed on the outer side of the heat-conducting plate 3. Bolt holes are opened on the side ears 4 for connecting the outer shell 201 of the heat dissipation component 2.
[0030] In terms of details, the heat conduction ring 301 has heat dissipation holes on its outer side, and the connecting plate 302 has connection holes inside; both are made of brass. The outer shell 201 is made of ABS plastic with a frosted surface to enhance wear resistance.
[0031] In actual setup, the high thermal conductivity of brass allows the heat generated by the coil to be quickly conducted to the heat-conducting plate 3, while the heat dissipation holes and connection holes increase the contact area between the heat-conducting plate and the air, thus initially achieving heat diffusion.
[0032] In addition, the connecting plate 302 fixes multiple heat-conducting rings 301 into a whole, which on the one hand enhances the structural stability of the heat-conducting plate 3 and avoids deformation due to thermal expansion and contraction. On the other hand, the connecting plate 302 itself also participates in heat conduction, transferring the heat of the inner small-diameter heat-conducting ring 301 to the outer large-diameter heat-conducting ring 301, expanding the heat dissipation range and reducing local heat accumulation.
[0033] In actual setup, a temperature sensor is installed inside the wireless charger body 1, and the temperature sensor monitors the temperature change inside the wireless charger body 1 in real time. When the temperature of the wireless charger body 1 reaches a preset threshold, such as 45°C, the control circuit triggers the motor 203 to start, and the blades 204 rotate to generate airflow. The cold air from the outside enters the cavity through the heat dissipation holes of the heat conduction ring 301 and the connection holes of the connecting plate 302, fully contacts the heat conduction plate 3 and absorbs heat, and then is discharged through the arc groove of the outer shell 201, taking away a large amount of heat.
[0034] It should be noted that the temperature sensor control method proposed in this embodiment is a commonly used temperature control method in the prior art. It mainly achieves circuit control of motor 203 through the cooperation of control module and temperature sensor. This application mainly protects the mechanical structure, so the circuit connection of temperature sensor, control module and motor 203 will not be described in detail.
[0035] The working principle of the above embodiments is as follows:
[0036] (1) When the wireless charger body 1 is working, the transmitting coil generates Joule heat due to the high frequency current. The heat is transferred to the heat-conducting plate 3 through the contact surface. Since the diameter of the heat-conducting ring 301 increases from the inside to the outside, it can cover the high-heat area in the center and the low-heat area at the edge of the coil. The high thermal conductivity of the brass material allows the heat to spread quickly to the entire heat-conducting plate 3. The connecting plate 302 further enhances the heat transfer between each heat-conducting ring 301 to avoid local overheating.
[0037] (2) The temperature sensor monitors the change of the internal temperature of the wireless charger body 1 in real time. When the temperature of the wireless charger body 1 reaches the preset threshold, such as 45°C, the control circuit triggers the motor 203 to start, the blade 204 rotates to generate airflow, and the cold air from the outside enters the cavity through the heat dissipation holes of the heat conduction ring 301 and the connection holes of the connecting plate 302, fully contacts the heat conduction plate 3 and absorbs heat, and then is discharged through the arc groove of the outer shell 201, taking away a large amount of heat.
[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A wireless low-power charger, characterized in that: It includes a wireless charger body (1) and a heat dissipation component (2); The heat dissipation component (2) is disposed below the wireless charger body (1). The heat dissipation component (2) includes a heat-conducting plate (3) installed on the lower surface of the wireless charger body (1). At least four side ears (4) are provided on the outer side of the heat-conducting plate (3). The heat dissipation component (2) is detachably mounted on the lower surface of the side ear (4); The heat-conducting plate (3) includes multiple heat-conducting rings (301), all of which are attached to the lower surface of the wireless charger body (1), and heat dissipation holes are provided on the outer side of each heat-conducting ring (301).
2. A wireless low-power charger according to claim 1, characterized in that: The diameters of the plurality of heat-conducting rings (301) increase sequentially from the inside to the outside, and the centers of the plurality of heat-conducting rings (301) are all located on the same vertical line.
3. A wireless low-power charger according to claim 1, characterized in that: A connecting plate (302) is fitted between each of the two adjacent heat-conducting rings (301) to increase the heat-conducting area with the wireless charger body (1).
4. A wireless low-power charger according to claim 3, characterized in that: The connecting plate (302) has a connecting hole inside.
5. A wireless low-power charger according to claim 3, characterized in that: Both the connecting plate (302) and the heat-conducting ring (301) are made of brass.
6. A wireless low-power charger according to claim 1, characterized in that: The heat dissipation assembly (2) includes a housing (201), a bracket (202), a motor (203), and blades (204); The outer shell (201) is detachably connected to the side ear (4) by bolts. The bracket (202) is fixed to the inner peripheral wall of the outer shell (201). The motor (203) is mounted on the bracket (202). The blade (204) is drivenly connected to the output end of the motor (203).
7. A wireless low-power charger according to claim 6, characterized in that: The lower end face of the outer shell (201) is provided with four arc-shaped grooves for the discharge of fluid.