charger

Abstract

The utility model discloses a charger, including casing and setting power pin and connecting interface on the casing, the casing includes bottom shell and face shell, be equipped with power pin on the bottom shell, be equipped with connecting interface on the face shell, the bottom shell and face shell interlock and form sealed chamber, the sealed chamber inside fills and is equipped with fire -retardant gas. This charger sets up fire -retardant gas in sealed chamber, can prevent the self -ignition phenomenon of charger internal device when fault overheat, improves the security of charger.

Description

Technical Field

[0001] This utility model relates to the field of charger technology, and in particular to a charger. Background Technology

[0002] Currently, fast charging technology is becoming increasingly mature. In order to meet the daily power needs of electronic products, the power of chargers is getting higher and higher, and the power density is also constantly improving. Under high power conditions, the power devices inside the charger are prone to generating a lot of heat. If used improperly, it can easily cause overheating and spontaneous combustion, which poses a significant safety hazard. Utility Model Content

[0003] This utility model provides a charger to solve the problem that existing chargers are prone to spontaneous combustion when the power devices overheat.

[0004] This utility model provides a charger, including a housing and power pins and a connection interface disposed on the housing;

[0005] The housing includes a bottom shell and a top shell. The bottom shell is provided with a power plug, and the top shell is provided with a connection interface.

[0006] The bottom shell and the top shell are joined together to form a sealed cavity, which is filled with flame-retardant gas.

[0007] Preferably, the connection interface and the front shell are integrally formed; the power plug and the bottom shell are integrally formed.

[0008] Preferably, the bottom shell is provided with a mating groove, and the top shell is provided with a mating protrusion;

[0009] Alternatively, the bottom shell is provided with a connecting protrusion, and the top shell is provided with a connecting groove;

[0010] The engagement protrusion is used to fit into the engagement groove.

[0011] Preferably, the charger further includes a seal disposed at the junction of the bottom shell and the top shell.

[0012] Preferably, the sealant includes a sealant.

[0013] Preferably, the charger further includes a PCB board disposed within the housing;

[0014] The PCB board is equipped with power devices, which are electrically connected to the connection interface and power pins.

[0015] Preferably, the power device includes at least one of a transformer, a power inductor, a metal-oxide-semiconductor field-effect transistor, an insulated-gate bipolar transistor, and a power diode.

[0016] Preferably, the flame-retardant gas includes nitrogen.

[0017] Preferably, the pressure of the flame-retardant gas inside the housing is 20~80 kPa.

[0018] Preferably, the connection interface includes either a USB Type-A interface or a Type-C interface.

[0019] The charger provided in this embodiment of the utility model has a housing that can be formed by combining a bottom shell and a top shell. This allows for the convenient filling of the charger with flame-retardant gas. By placing flame-retardant gas in the charger, the internal components of the charger can be prevented from spontaneously combusting when they overheat due to a fault, thus improving the safety of the charger. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of the charger in one embodiment of the present invention.

[0022] In the diagram: 1. Housing; 11. Bottom shell; 12. Front shell; 2. Power pin; 3. Connection interface; 4. Joint groove; 5. Joint protrusion; 6. PCB board. Detailed Implementation

[0023] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] This utility model provides a charger, including a housing 1 and a power plug 2 and a connection interface 3 disposed on the housing 1; the housing 1 includes a bottom shell 11 and a front shell 12, the bottom shell 11 is provided with the power plug 2, and the front shell 12 is provided with the connection interface 3; the bottom shell 11 and the front shell 12 are assembled to form a sealed chamber, and the sealed chamber is filled with a flame-retardant gas.

[0027] As an example, the charger includes a housing 1 and a power plug 2 and a connection interface 3 disposed on the housing 1. The housing 1 includes a bottom shell 11 and a top shell 12. The bottom shell 11 is provided with the power plug 2, and the top shell 12 is provided with the connection interface 3. The bottom shell 11 and the top shell 12 are two open boxes of matching dimensions. After the bottom shell 11 and the top shell 12 are assembled by means of ultrasonic welding, a complete housing 1 with a sealed internal cavity can be formed. This sealed cavity can accommodate the electrical components of the charger, such as the PCB board 6. The electrical components are electrically connected to the power plug 2 and the connection interface 3 to form a complete charger structure. When assembling the bottom shell 11 and the top shell 12 to form the charger housing 1, the ultrasonic automatic welding station used to assemble the bottom shell 11 and the top shell 12, the bottom shell 11, and the top shell 12 can be placed in a flame-retardant gas environment for ultrasonic welding assembly, so that the sealed cavity formed by assembly is filled with flame-retardant gas.

[0028] In this example, by setting a charger housing 1 that can be formed by assembling a bottom shell 11 and a front shell 12, it is convenient to fill the charger with flame-retardant gas. By setting flame-retardant gas in the charger, it is possible to prevent the internal components of the charger from spontaneously combusting when they overheat due to a fault, thereby improving the safety of the charger.

[0029] In one embodiment, the connection interface 3 and the front shell 12 are integrally formed; the power plug 2 and the bottom shell 11 are integrally formed.

[0030] As an example, the connection interface 3 and the front shell 12 can be integrally molded. Specifically, the connection interface 3 can be fixed in the corresponding position of the injection mold of the front shell 12 before the front shell 12 is injection molded. After the injection molding is completed, the integrally molded connection interface 3 and the front shell 12 can be obtained. Similarly, the power plug 2 can be fixed in the corresponding position of the injection mold of the bottom shell 11 before the bottom shell 11 is injection molded. After the injection molding is completed, the integrally molded power plug 2 and the bottom shell 11 can be obtained.

[0031] In one embodiment, the bottom shell 11 is provided with a mating groove 4 and the top shell 12 is provided with a mating protrusion 5; or, the bottom shell 11 is provided with a mating protrusion 5 and the top shell 12 is provided with a mating groove 4; the mating protrusion 5 is used to fit into the mating groove 4.

[0032] As an example, the bottom shell 11 has a mating groove 4, and the top shell 12 has a mating protrusion 5; or, the bottom shell 11 has a mating protrusion 5, and the top shell 12 has a mating groove 4; when the bottom shell 11 and the top shell 12 are assembled, the mating protrusion 5 can be fitted into the mating groove 4. By providing the mating groove 4 and the mating protrusion 5 that matches the mating groove 4, the bottom shell 11 and the top shell 12 can be accurately positioned when assembled, and the mating surface area of ​​the bottom shell 11 and the top shell 12 is increased, thereby improving the tightness of their connection.

[0033] In one embodiment, the charger further includes a seal disposed at the junction of the bottom shell 11 and the front shell 12.

[0034] As an example, the charger also includes a seal disposed at the joint between the bottom shell 11 and the front shell 12, which is used to make the connection between the bottom shell 11 and the front shell 12 tighter when ultrasonically welding the bottom shell 11 and the front shell 12, thereby making the formed closed chamber more airtight.

[0035] In one embodiment, the sealant includes a sealant.

[0036] As an example, the sealant can be a sealant applied at the joint between the bottom shell 11 and the top shell 12. Specifically, before ultrasonically welding the bottom shell 11 and the top shell 12 together, sealant can be evenly applied to the bottom shell 11 at the joint with the top shell 12, and to the top shell 12 at the joint with the bottom shell 11. During ultrasonic welding, the sealant can be thermally melted to fill the joint gap between the bottom shell 11 and the top shell 12, making the connection between the bottom shell 11 and the top shell 12 tighter, thereby making the formed sealed chamber more airtight.

[0037] In one embodiment, the charger further includes a PCB board 6 disposed within the housing 1; the PCB board 6 is provided with power devices, which are electrically connected to the connection interface 3 and the power plug 2.

[0038] As an example, the charger also includes a PCB board 6 disposed within the enclosed cavity of the housing 1. Before assembling the bottom housing 11 and the front housing 12, the corresponding power devices on the PCB board 6 can be electrically connected to the power pins 2 on the bottom housing 11 via metal wires. At the same time, the power devices can be electrically connected to the connection interface 3 on the front housing 12. After the circuit of the PCB board 6 is tested and found to be correct, the bottom housing 11 and the front housing 12 are then placed in a flame-retardant gas environment for assembly to ensure that the charger can operate normally.

[0039] In one embodiment, the power device includes at least one of a transformer, a power inductor, a metal-oxide-semiconductor field-effect transistor, an insulated-gate bipolar transistor, and a power diode.

[0040] As an example, the power devices on PCB board 6 can typically include at least one of transformers, power inductors, metal-oxide-semiconductor field-effect transistors, insulated-gate bipolar transistors, and power diodes. The flame-retardant gas located in the enclosed chamber of the charger can provide flame retardancy for the power devices under adverse operating conditions (overheating), thereby improving the safety of the charger.

[0041] In one embodiment, the flame-retardant gas includes nitrogen.

[0042] As an example, the flame-retardant gas can be nitrogen, which has flame-retardant properties. Nitrogen filling the sealed chamber can effectively reduce the oxygen concentration around the power devices. Furthermore, nitrogen is inert to many chemicals, does not readily undergo combustion reactions, and possesses heat-insulating properties, thus providing effective flame-retardant protection for the power devices. Simultaneously, nitrogen has low sound conductivity, effectively isolating noise generated by electronic components on the PCB board 6, improving the charger's user experience.

[0043] In another example, the flame-retardant gas could also be argon or the like.

[0044] In one embodiment, the pressure of the flame-retardant gas inside the housing 1 is 20~80 kPa.

[0045] As an example, the pressure of the flame-retardant gas inside the housing 1 can be in the range of 20~80 kPa. Specifically, since altitude and temperature affect the pressure of the flame-retardant gas inside the charger, the bottom shell 11 and the front shell 12 can be assembled first in a flame-retardant gas environment at a preset pressure (e.g., 50 kPa). Then, noise and temperature tests are conducted on the charger assembled under this preset pressure. Based on the noise and temperature test results, the preset pressure is added or subtracted within the range to finally determine a suitable pressure value.

[0046] In one embodiment, the connection interface 3 includes either a USB Type-A interface or a Type-C interface.

[0047] As an example, connection interface 3 may include either a USB Type-A interface or a Type-C interface to adapt to various application scenarios.

[0048] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A charger, characterized in that, Includes a housing and power pins and connection interfaces disposed on the housing; The housing includes a bottom shell and a top shell. The bottom shell is provided with a power plug, and the top shell is provided with a connection interface. The bottom shell and the top shell are joined together to form a sealed cavity, which is filled with flame-retardant gas.

2. The charger according to claim 1, characterized in that, The connection interface and the front shell are integrally formed; the power plug and the bottom shell are integrally formed.

3. The charger according to claim 1, characterized in that, The bottom shell is provided with a joint groove, and the top shell is provided with a joint protrusion; Alternatively, the bottom shell is provided with a connecting protrusion, and the top shell is provided with a connecting groove; The engagement protrusion is used to fit into the engagement groove.

4. The charger according to claim 1, characterized in that, The charger also includes a seal disposed at the junction of the bottom shell and the top shell.

5. The charger according to claim 4, characterized in that, The sealant includes a sealant.

6. The charger according to claim 1, characterized in that, The charger also includes a PCB board disposed within the housing; The PCB board is equipped with power devices, which are electrically connected to the connection interface and power pins.

7. The charger according to claim 6, characterized in that, The power device includes at least one of a transformer, a power inductor, a metal-oxide-semiconductor field-effect transistor, an insulated-gate bipolar transistor, and a power diode.

8. The charger according to claim 1, characterized in that, The flame-retardant gas includes nitrogen.

9. The charger according to claim 1, characterized in that, Inside the housing, the pressure of the flame-retardant gas is 20~80 kPa.

10. The charger according to claim 1, characterized in that, The connection interface includes either a USB Type-A interface or a Type-C interface.

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