A charging device for lithium batteries

Abstract

The utility model relates to a kind of charging device of lithium battery, belong to battery charger technical field.The charging device of lithium battery, comprising: shell and heat dissipation mechanism, the inside fixed connection of shell is connected with charging module, the surface electric connection of charging module has input line and output line, the input line and output line are all through out shell;The heat dissipation mechanism includes the heat dissipation fan fixedly connected in the inside of shell, the air inlet end fixed connection and the communication of the heat dissipation fan have air cylinder, the air inlet end of the air cylinder is through out shell;Heat dissipation mechanism is rotated by airflow drive filter screen and uses centrifugal force to automatically remove attached dust, realize sustained self-cleaning, effectively prevent dust from entering the inside of shell and accumulate on the surface of radiating fin and charging module, to avoid the problem that the heat dissipation efficiency is significantly reduced due to dust cover forms heat insulation layer, guarantee the stability of charger sustained high current output.

Description

Technical Field

[0001] This utility model relates to the field of battery charger technology, and in particular to a charging device for lithium batteries. Background Technology

[0002] Active cooling lithium battery chargers with built-in fans use forced air cooling to efficiently control the heat generated during high-power fast charging. They are typically equipped with an intelligent temperature control system that automatically adjusts the fan speed according to the temperature, ensuring the stability of continuous high-current output. They are suitable for fast charging scenarios such as power tools and multi-cell battery packs.

[0003] Existing active cooling lithium battery chargers with fans suffer from dust accumulation on the internal heat sink and charging module surface due to their ventilation hole structure. The dust-covered insulation layer severely hinders heat dissipation, resulting in a significant decrease in heat dissipation efficiency. Although the fan runs continuously, it cannot effectively dissipate heat, posing a risk of overheating. Utility Model Content

[0004] Therefore, it is necessary to provide a lithium battery charging device to address the problem that existing active cooling lithium battery chargers with fans have insufficient dustproof design, which leads to dust accumulation and seriously affects heat dissipation efficiency.

[0005] A lithium battery charging device includes: a housing and a heat dissipation mechanism. A charging module is fixedly connected inside the housing. An input line and an output line are electrically connected to the surface of the charging module. Both the input line and the output line pass through the housing.

[0006] In one embodiment, the heat dissipation mechanism includes a cooling fan fixedly connected inside the housing. The air intake end of the cooling fan is fixedly connected to and communicates with a fan duct. The air intake end of the fan duct extends through the housing. A filter screen is rotatably connected to the inner side of the air intake end of the fan duct. A fan wheel is fixedly connected to the end of the filter screen facing the cooling fan. The angle between the axis of the air intake end of the fan duct, the axis of the fan wheel, and the axis of the cooling fan is 45 degrees.

[0007] In one embodiment, a circular frame is fixedly connected to the surface of the filter screen, and the circular frame is rotatably connected to the inside of the air duct.

[0008] In one embodiment, a ball bearing is embedded in the inner side of the air duct, and the ball bearing contacts the circular frame.

[0009] In one embodiment, the surface of the circular frame is provided with an annular groove, and the arcuate surface of the ball contacts the annular groove.

[0010] In one embodiment, the number of balls is not less than twenty, and the balls are arranged in a ring around the axis of the annular groove.

[0011] In one embodiment, the cross-section of the annular groove is arc-shaped, and the depth of the annular groove is less than the radius of the ball.

[0012] In one embodiment, a reinforcing mesh that contacts the filter screen is fixedly connected to the inner side of the circular frame, and the reinforcing mesh is disposed on the side of the filter screen facing the cooling fan.

[0013] In one embodiment, the mesh size of the reinforcing mesh is larger than that of the filter mesh, and the thickness of the reinforcing mesh ribs is smaller than that of the filter mesh.

[0014] Beneficial effects

[0015] 1. In the above-mentioned lithium battery charging device, the heat dissipation mechanism drives the filter screen to rotate through airflow and uses centrifugal force to automatically remove the attached dust, thereby achieving continuous self-cleaning and effectively preventing dust from entering the inside of the casing and accumulating on the surface of the heat sink and charging module. This avoids the problem of a significant decrease in heat dissipation efficiency caused by the formation of a heat insulation layer due to dust coverage, and ensures the stability of the charger's continuous high current output.

[0016] 2. The heat dissipation mechanism, through a low-friction rotating mechanism and mechanical support design, ensures that the filter can start sensitively, operate smoothly and reliably even under weak airflow, and maintain the self-cleaning function continuously and effectively. This significantly reduces the heat dissipation efficiency decay caused by dust accumulation and improves the durability and heat dissipation stability of the equipment in harsh and dusty environments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of a partial structure in this utility model;

[0020] Figure 3 This is a cross-sectional schematic diagram of a partial structure in this utility model;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a partial exploded view of the heat dissipation mechanism of this utility model.

[0023] Figure label:

[0024] 100. Housing; 200. Charging module; 300. Input cable; 400. Output cable; 500. Heat dissipation mechanism; 510. Cooling fan; 520. Air duct; 530. Filter screen; 540. Fan wheel; 550. Frame; 551. Circular groove; 560. Ball bearing; 570. Reinforcing rib mesh. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The following is combined Figures 1-5 This invention describes a charging device for a lithium battery.

[0027] In one embodiment, a lithium battery charging device includes: a housing 100 and a heat dissipation mechanism 500. A charging module 200 is fixedly connected inside the housing 100. An input line 300 and an output line 400 are electrically connected to the surface of the charging module 200. Both the input line 300 and the output line 400 pass through the housing 100.

[0028] The specific model of this lithium battery charger is the G168 series lithium battery charger from Gurun Power.

[0029] As the "brain and heart" of the device, the charging module 200 has a clear power conversion and control process: external AC power first enters the EMI filter and rectification module, which filters out grid noise and rectifies it into DC power; then the DC power is sent to the PWM control and switching module, where it is precisely converted into the voltage and current specifications required by the battery with the cooperation of high-frequency switching MOSFETs, transformers and controllers; at the same time, the voltage and current feedback and sampling module monitors the output status in real time and feeds it back to the control chip, which follows the optimal charging curve of the lithium battery (constant current fast charging first, then constant voltage trickle charging) through the built-in constant current and constant voltage control module; finally, after filtering and reverse connection protection by the output and interface protection module, the power is sent to the battery through the output line 400. The whole process is coordinated and controlled by the intelligent management and display module (MCU), and the current status is informed to the user through indicator lights.

[0030] The specific usage procedure for this lithium battery charger is as follows: Before charging, first confirm that the charger's output specifications are compatible with the battery pack requirements. Check that the environment is dry, well-ventilated, and away from flammable materials. Then, connect the output line 400 and the input line 300 according to the principle of "battery first, then power supply". During charging, observe the indicator lights to confirm the status (red light indicates charging in progress, green light indicates completion). Listen to whether the cooling fan 510 is starting normally. If the device overheats, makes abnormal noises, or emits smoke, immediately perform the emergency operation of "disconnecting the power supply first, then disconnecting the battery". After charging, disconnect the connection in the order of "unplugging the mains power first, then disconnecting the battery". Regularly check and clean the dust on the surface of the filter 530 to maintain its self-cleaning heat dissipation performance. For long-term storage, the device should be placed in a dry and dust-free environment.

[0031] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the heat dissipation mechanism 500 includes a cooling fan 510 fixedly connected inside the housing 100. As the core of active heat dissipation, it forcibly draws in external airflow and forms an effective air duct, providing stable and powerful airflow for the entire heat dissipation system. The air intake end of the cooling fan 510 is fixedly connected to and communicates with a fan duct 520, forming a clearly oriented air intake channel. A unique 45-degree angle structure precisely guides the airflow to impact the impeller 540 at the optimal angle. The air intake end of the fan duct 520 extends through the housing 100. A filter screen 530 is rotatably connected to the inner side of the air intake end of the fan duct 520. This filter screen effectively intercepts dust particles in the air, preventing them from entering the equipment. Its rotatable nature allows the intercepted dust to be automatically ejected under centrifugal force, achieving self-dust removal. The end of the filter screen 530 facing the cooling fan 510 is fixedly connected to the impeller 540, which cleverly converts the energy of the intake airflow into rotational mechanical energy, thus driving the filter screen 530 to rotate at high speed without additional power. The centerline of the air intake end of the air duct 520 and the centerline of the impeller 540 are both at a 45-degree angle with the centerline of the cooling fan 510, thereby converting disordered airflow into effective torque to drive rotation.

[0032] A circular frame 550 is fixedly connected to the surface of the filter screen 530, and the circular frame 550 is rotatably connected to the inner side of the air duct 520. Ball bearings 560 are embedded and installed inside the air duct 520. The ball bearings 560 contact the circular frame 550, and their cooperation greatly reduces rotational friction resistance, allowing the impeller 540 to start sensitively and operate smoothly even in weak airflow. An annular groove 551 is formed on the surface of the circular frame 550. The arc-shaped surface of the ball bearings 560 contacts the annular groove 551, and its arc-shaped cross-section perfectly accommodates the ball bearings 560 and acts as a guide and limiter to ensure stable rotation. There are no fewer than twenty ball bearings 560, and the ball bearings 560 are arranged in a ring around the axis of the annular groove 551 to provide uniform support force. The cross-section of the annular groove 551 is arc-shaped, and the depth of the annular groove 551 is less than the radius of the ball bearings 560.

[0033] A reinforcing rib mesh 570 is fixedly connected to the inner side of the circular frame 550, contacting the filter screen 530. This mesh provides crucial mechanical support and reinforcement for the high-speed rotating filter screen 530, effectively preventing deformation or vibration. The reinforcing rib mesh 570 is located on the side of the filter screen 530 facing the cooling fan 510. The mesh aperture of the reinforcing rib mesh 570 is larger than that of the filter screen 530, while the rib thickness of the reinforcing rib mesh 570 is smaller than that of the filter screen 530, thus ensuring structural stability while minimizing obstruction to airflow.

[0034] Working Principle: During normal operation of this lithium battery charger, the cooling fan 510 draws in external airflow. The airflow passes through the fan duct 520 and impacts the impeller 540 at a 45-degree angle, driving it to rotate. This, in turn, drives the fixed filter 530 to rotate synchronously. The incoming air is effectively blocked by the rotating filter 530, thus preventing internal dust accumulation. Simultaneously, the centrifugal force of rotation continuously flings the attached dust out of the fan duct 520, achieving self-cleaning and maintaining the filter 530's unobstructed flow and continuous heat dissipation efficiency. The clean airflow continues to be blown towards the charging module 200, carrying away heat and ensuring stable heat dissipation efficiency, thus improving equipment reliability. The entire mechanism achieves low-friction rotation through the cooperation of the ball bearings 560 and the annular groove 551, and the filter 530 is supported by the reinforcing mesh 570 to ensure structural stability and durability.

[0035] It should be noted that the charging module 200, input line 300, output line 400 and cooling fan 510 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs, and will not be elaborated here. At the same time, the cooling fan 510 is powered by the charging module 200 after being connected to the power supply.

[0036] The above 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 will 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.

Claims

1. A charging device for a lithium battery, characterized by, include: A housing (100) is provided, and a charging module (200) is fixedly connected inside the housing (100). An input line (300) and an output line (400) are electrically connected to the surface of the charging module (200). Both the input line (300) and the output line (400) extend out of the housing (100). A heat dissipation mechanism (500) includes a cooling fan (510) fixedly connected inside the housing (100). The air intake end of the cooling fan (510) is fixedly connected to and communicates with a duct (520). The air intake end of the duct (520) extends through the housing (100). A filter screen (530) is rotatably connected to the inner side of the air intake end of the duct (520). A fan wheel (540) is fixedly connected to one end of the filter screen (530) facing the cooling fan (510). The angle between the axis of the air intake end of the duct (520), the axis of the fan wheel (540), and the axis of the cooling fan (510) is 45 degrees.

2. The lithium battery charging device according to claim 1, characterized in that, A circular frame (550) is fixedly connected to the surface of the filter screen (530), and the circular frame (550) is rotatably connected to the inside of the air duct (520).

3. The lithium battery charging device according to claim 2, characterized in that, A ball bearing (560) is embedded in the inner side of the air duct (520), and the ball bearing (560) contacts the circular frame (550).

4. The lithium battery charging device according to claim 3, characterized in that, The circular frame (550) has an annular groove (551) on its surface, and the arc surface of the ball (560) contacts the annular groove (551).

5. The lithium battery charging device according to claim 4, characterized in that, The number of the balls (560) is not less than twenty, and the balls (560) are distributed in a ring around the axis of the annular groove (551).

6. The lithium battery charging device according to claim 4, characterized in that, The cross-section of the annular groove (551) is arc-shaped, and the depth of the annular groove (551) is less than the radius of the ball (560).

7. The lithium battery charging device according to claim 2, characterized in that, The inner side of the circular frame (550) is fixedly connected to a reinforcing mesh (570) that contacts the filter screen (530). The reinforcing mesh (570) is located on the side of the filter screen (530) facing the cooling fan (510).

8. The lithium battery charging device according to claim 7, characterized in that, The mesh size of the reinforcing mesh (570) is larger than that of the filter mesh (530), and the thickness of the reinforcing ribs of the reinforcing mesh (570) is smaller than that of the filter mesh (530).

Images