Short circuit prevention device for lithium battery charger power panel

Abstract

The utility model discloses a short circuit prevention device for a lithium battery charger power panel, which relates to the technical field of charger short circuit prevention, and comprises a power panel main body, a short circuit prevention assembly is fixedly arranged at one corner of the power panel main body, and the short circuit prevention assembly comprises a circuit board, a protection chip and a relay, the protection chip is fixedly welded on the circuit board, and the relay is fixedly installed on the surface of the circuit board. The short circuit prevention assembly is arranged at the corner of the power panel main body, the first threaded hole is arranged in the power panel main body, and the second threaded hole is arranged in the circuit board, so that when the short circuit prevention assembly is installed, the short circuit is prevented from being damaged; the circuit board and the power panel body can be connected by installing the threaded rod at the first threaded hole, the butt joint difficulty can be effectively reduced through the positioning plate at the edge of the circuit board, the effect of improving the stability of the circuit board is achieved, and the installation speed can be accelerated in an auxiliary mode.

Description

Technical Field

[0001] This utility model relates to the field of charger short-circuit protection technology, and in particular to a short-circuit protection device for a lithium battery charger power board. Background Technology

[0002] A lithium battery charger is a device specifically designed to charge lithium batteries. Its main function is to convert external power into DC voltage and current suitable for charging lithium batteries, thereby replenishing their energy. Devices that use it mainly include smartphones, tablets, laptops, digital cameras, and handheld game consoles. The charger is equipped with short-circuit protection devices to protect the circuitry.

[0003] For example, CN201360159Y discloses a short-circuit protection charger, which includes a transformer, a diode, a diode 1, a 1UF capacitor, a 12V relay, a 12V battery, etc. The 1UF capacitor is connected to the diode, and the diode 1 is connected to the 12V relay.

[0004] However, in the existing technology, the short-circuit protection device of the battery panel is mainly based on the circuit board, while the power board in the charger is relatively small. This makes it difficult to install the short-circuit protection device on the power board of the lithium battery charger. It is not convenient to install it quickly and usually requires the use of multiple tools to ensure the stability of the short-circuit protection device during the installation process. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the existing short-circuit protection devices are difficult to operate and inconvenient to install quickly when installed on the power board of a lithium battery charger, and to propose a short-circuit protection device for a lithium battery charger power board.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a short-circuit protection device for a lithium battery charger power board, comprising a power board body, wherein a short-circuit protection component is fixedly installed at one corner of the power board body;

[0007] The short-circuit protection assembly includes a circuit board, a protection chip, and a relay. The protection chip is fixedly soldered onto the circuit board, and the relay is fixedly mounted on the surface of the circuit board. The terminals of the relay and the protection chip are fixedly connected. A connecting plate is fixedly mounted at the edge of the circuit board, and the upper surface of the connecting plate overlaps the lower surface of the power board body. A threaded hole is opened inside the connecting plate, and a through hole is opened inside the power board body. A threaded ring is fixedly mounted on the inner wall of the through hole, and the threaded hole is aligned with the through hole. A positioning plate is fixedly mounted at the edge of the circuit board, and one end of the power board body overlaps one side of the positioning plate.

[0008] Preferably, a butt joint block is fixedly installed at the edge of the power panel body, and the butt joint block is located at the joint of the power panel body and the circuit board.

[0009] Preferably, a limiting plate is fixedly installed on the upper surface of the circuit board, and a anti-dropping plate is fixedly installed on the top of the limiting plate.

[0010] Preferably, a wiring terminal is slidably connected in the limiting plate, and one end of the wiring terminal is inserted into the butt joint block.

[0011] Preferably, a blocking plate is fixedly installed at one end of the limiting plate, and the blocking plate is located at one side of the wiring terminal.

[0012] Preferably, a guide rod is fixedly installed at one end of the wiring terminal, and the guide rod is inserted into the blocking plate.

[0013] Preferably, a tension spring is fixedly connected between the blocking plate and the wiring terminal, and the tension spring is sleeved on the outer wall of the guide rod.

[0014] Compared with the prior art, the power panel body has the advantages and positive effects that:

[0015] 1、In the utility model, through setting the anti-short circuit assembly at the corner of the power panel body, the first threaded hole is arranged in the power panel body, the second threaded hole is arranged in the circuit board, when installing the anti-short circuit assembly, the threaded rod is installed in the first threaded hole to connect the circuit board and the power panel body, the positioning plate at the edge of the circuit board can effectively reduce the difficulty of butt joint, plays the role of improving the stability of the circuit board, and can assist in accelerating the installation speed.

[0016] 2、In the utility model, the limiting plate is arranged on the circuit board to limit the movement route of the wiring terminal, after installing the anti-short circuit device, under the action of the tension spring, the wiring terminal can be popped into the butt joint block, so that the circuit of the anti-short circuit assembly and the circuit of the power panel body can be quickly connected. DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic view of the anti-short circuit device for the power panel of the lithium battery charger is provided for the utility model;

[0018] Figure 2 A top view of the anti-short circuit device for the power panel of the lithium battery charger is provided for the utility model;

[0019] Figure 3 A three-dimensional structure schematic view of the anti-short circuit assembly of the anti-short circuit device for the power panel of the lithium battery charger is provided for the utility model;

[0020] Figure 4The utility model provides a kind of limit plate and wiring terminal three-dimensional structure schematic diagram of short-circuit protection device for lithium battery charger power panel.

[0021] Legend: 1, power panel main body;2, short-circuit protection component;3, through hole;4, threaded ring;5, butt joint block;21, circuit board;22, protection chip;23, relay;24, positioning plate;25, adapter plate;26, threaded hole;27, limit plate;28, wiring terminal;29, anti-drop plate;210, blocking plate;211, guide rod;212, tension spring. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is further described below in conjunction with the drawings and examples. It should be noted that the examples and features in the examples of the present application can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, therefore, the utility model is not limited to the specific examples disclosed in the following specification.

[0024] Example one: as Figure 1 , Figure 2 , Figure 3 And Figure 4 The utility model provides a kind of short-circuit protection device for lithium battery charger power panel, including power panel main body 1, power panel main body 1 one corner is fixedly installed with short-circuit protection component 2;

[0025] Short-circuit protection component 2 includes circuit board 21, protection chip 22 and relay 23, protection chip 22 is fixedly welded on circuit board 21, relay 23 is fixedly installed on the surface of circuit board 21, and the wiring end of relay 23 is fixedly connected between the wiring end of protection chip 22, the edge of circuit board 21 is fixedly installed with adapter plate 25, the upper surface of adapter plate 25 is overlapped on the lower surface of power panel main body 1, threaded hole 26 is set in the inside of adapter plate 25, through hole 3 is set in the inside of power panel main body 1, threaded ring 4 is fixedly installed on the inner wall of through hole 3, threaded hole 26 is aligned with through hole 3, the edge of circuit board 21 is fixedly installed with positioning plate 24, one end of power panel main body 1 is overlapped on the side of positioning plate 24, and the edge of power panel main body 1 is fixedly installed with butt joint block 5, and butt joint block 5 is located at the junction of power panel main body 1 and circuit board 21.

[0026] The specific settings and effects of the embodiment are described below. The anti-short circuit assembly 2 is installed at a corner of the power panel body 1. During assembly, the circuit board 21 is spliced with the power panel body 1. During splicing, the adapter plate 25 is overlapped with the lower surface of the power panel body 1, and the positioning plate 24 is attached to the edge of the power panel body 1, thereby forming a three-surface attached structure, which plays a role of rapid positioning and assembly. The edge of the power panel body 1 is provided with a butt joint block 5 for connecting the circuit.

[0027] A through hole 3 is formed in the power panel body 1, and a threaded hole 26 is formed in the adapter plate 25. The through hole 3 is aligned with the threaded hole 26. In use, the threaded rod is installed in the through hole 3. Rotating the threaded rod allows it to enter the threaded hole 26. At this time, the threaded rod is connected with the adapter plate 25 and the threaded ring 4, thereby completing the fixation of the circuit board 21.

[0028] The model of the protection chip 22 is RV2302A, and the model of the relay 23 is JQC-3F. In actual use, when the current becomes large in a short time, the protection chip 22 immediately controls the relay 23 to disconnect the circuit.

[0029] Embodiment two: as shown in Figure 3 and Figure 4 , the upper surface of the circuit board 21 is fixedly installed with a limiting plate 27. The top of the limiting plate 27 is fixedly installed with an anti-falling plate 29. The inside of the limiting plate 27 is slidably connected with a wiring terminal 28. One end of the wiring terminal 28 is inserted into the inside of the butt joint block 5. One end of the limiting plate 27 is fixedly installed with a blocking plate 210, which is located on one side of the wiring terminal 28. One end of the wiring terminal 28 is fixedly installed with a guide rod 211, which is inserted into the inside of the blocking plate 210. The blocking plate 210 and the wiring terminal 28 are fixedly connected with a tension spring 212, which is sleeved on the outer wall of the guide rod 211.

[0030] The effect of the whole embodiment is that the anti-falling plate 29 is fixedly installed on the upper surface of the limiting plate 27, mainly used for preventing the wiring terminal 28 from falling off from the limiting plate 27. The circuit of the wiring terminal 28 is connected in series in the circuit board 21. During installation, the wiring terminal 28 is connected with the butt joint block 5, and then the circuit board 21 is pushed to insert the wiring terminal 28 into the butt joint block 5, thereby connecting the anti-short circuit assembly 2 and the power panel body 1 in series.

[0031] The guide rod 211 of one end of the terminal 28 is inserted in the blocking plate 210, and in actual assembly, the terminal 28 can be moved in a fixed range to avoid affecting normal installation, the guide rod 211 can determine the moving route of the terminal 28, and the tension spring 212 can top the terminal 28 in the docking block 5, which is convenient for disassembly and can ensure the stability of the terminal 28.

[0032] The use method and working principle of the device are as follows: in assembly, the circuit board 21 is spliced to the corner of the power board main body 1, in splicing, the terminal 28 is moved to avoid affecting normal installation, the connecting plate 25 is lapped to the lower surface of the power board main body 1, and the positioning plate 24 is attached to the edge of the power board main body 1, thereby forming a three-surface attached structure, then the terminal 28 is loosened, and under the rebound of the tension spring 212, the terminal 28 is pushed into the docking block 5;

[0033] Then the threaded rod is installed into the through hole 3, and rotating the threaded rod makes it enter the threaded hole 26 of the connecting plate 25, at this time, the threaded rod is connected with the connecting plate 25 and the threaded ring 4 at the same time, thereby completing the fixation of the circuit board 21;

[0034] When the current becomes large in a short time, the protection chip 22 immediately controls the relay 23 to disconnect the circuit.

[0035] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments still belong to the protection scope of the present application.

Claims

1. A short-circuit protection device for a lithium battery charger power board, comprising a power board body (1), characterized in that: A short-circuit protection component (2) is fixedly installed at one corner of the power board body (1); The short-circuit protection component (2) includes a circuit board (21), a protection chip (22), and a relay (23). The protection chip (22) is fixedly soldered onto the circuit board (21). The relay (23) is fixedly installed on the surface of the circuit board (21). The terminals of the relay (23) are fixedly connected to the terminals of the protection chip (22). A connecting plate (25) is fixedly installed at the edge of the circuit board (21). The upper surface of the connecting plate (25) overlaps the lower surface of the power board body (1). A threaded hole (26) is opened inside the connecting plate (25). A through hole (3) is opened inside the power board body (1). A threaded ring (4) is fixedly installed on the inner wall of the through hole (3). The threaded hole (26) is aligned with the through hole (3). A positioning plate (24) is fixedly installed at the edge of the circuit board (21). One end of the power board body (1) overlaps one side of the positioning plate (24).

2. The short-circuit protection device for a lithium battery charger power board according to claim 1, characterized in that: A mating block (5) is fixedly installed at the edge of the power board body (1), and the mating block (5) is located at the junction of the power board body (1) and the circuit board (21).

3. The short-circuit protection device for a lithium battery charger power board according to claim 1, characterized in that: A limiting plate (27) is fixedly installed on the upper surface of the circuit board (21), and an anti-detachment plate (29) is fixedly installed on the top of the limiting plate (27).

4. A short-circuit protection device for a lithium battery charger power board according to claim 3, characterized in that: The limiting plate (27) has a sliding connection to a terminal block (28), one end of which is inserted into the inside of the mating block (5).

5. A short-circuit protection device for a lithium battery charger power board according to claim 3, characterized in that: A blocking plate (210) is fixedly installed at one end of the limiting plate (27), and the blocking plate (210) is located on one side of the wiring terminal (28).

6. A short-circuit protection device for a lithium battery charger power board according to claim 4, characterized in that: One end of the terminal block (28) is fixedly mounted with a guide rod (211), which is inserted into the interior of the baffle plate (210).

7. A short-circuit protection device for a lithium battery charger power board according to claim 5, characterized in that: A tension spring (212) is fixedly connected between the baffle plate (210) and the terminal block (28), and the tension spring (212) is sleeved on the outer wall of the guide rod (211).

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