Battery car charger with short circuit prevention function
By using water-absorbing resin particles and protective plate components in the electric vehicle charger, the problem of short circuits in the charger under harsh outdoor weather conditions has been solved, achieving short circuit protection, extending the charger's lifespan, and improving safety.
Patent Information
- Application Number
- CN202520151060.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing electric vehicle chargers are prone to short circuits in harsh outdoor weather conditions, leading to charger damage and fire risks, and lack effective protective measures.
A control component with water-absorbing resin particles was designed. After absorbing water and expanding, the particles squeeze the conductive sheet to ensure the normal operation of the motor. The heat dissipation holes are sealed by a protective plate to prevent moisture from entering the internal circuit.
It effectively prevents the charger from short-circuiting in severe weather, extends its service life, and increases its flexibility and safety.
Smart Images
Figure CN223791323U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric vehicle charger technology, specifically an electric vehicle charger with short-circuit protection function. Background Technology
[0002] Electric vehicle (EV) chargers are charging devices specifically designed for the batteries of electric bicycles. Chargers can be classified into two main categories based on whether they have a power frequency (50 Hz) transformer or not. Chargers for freight tricycles generally use chargers with a power frequency transformer, which are large, heavy, and consume a lot of electricity, but are reliable. Chargers for electric bicycles and electric motorcycles use so-called switching power supply chargers, which are energy-saving and highly efficient.
[0003] Existing electric vehicle chargers still have some shortcomings in use. When charging electric vehicles, outdoor charging is often encountered. In the event of sudden severe weather (rain), without protection for the charger, the internal circuit board and electronic components of the charger may come into direct contact with water, which may lead to short circuits. Short circuits can not only damage the charger itself, but also cause the power cord to overheat, which may lead to a fire, thus causing inconvenience to users. Therefore, there is a need to propose an electric vehicle charger with short circuit protection function. Utility Model Content
[0004] The purpose of this utility model is to provide a battery charger with short-circuit protection function to solve the problem mentioned in the background art that the charger may short-circuit when used outdoors in severe weather when there is no time to take protective measures.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery charger with short-circuit protection function, comprising a fixed shell, heat dissipation holes on both sides of the fixed shell, and a control component installed on one side of the fixed shell, the control component comprising a fixed box, a fixed mesh fixedly connected to the top inner side of the fixed box, the interior of the fixed box being filled with water-absorbing resin particles, and a movable plate being movably connected to the interior of the fixed box, a movable conductive sheet being pressed and disposed at the bottom of the movable plate, and a fixed conductive sheet being attached to the bottom of the movable conductive sheet, and an electric component being fixedly installed at the bottom of the control component, the electric component comprising a battery box;
[0006] The battery box is connected to a motor via a connecting wire, and a rotating shaft is fixedly connected to one end of the motor's output shaft. A gear is fixedly connected to the outer wall of the rotating shaft, and a gear is meshed with one side of the gear. A rotating shaft is fixedly connected to the inner wall of the gear, and a protective component is provided on the top of the gear. The protective component includes a rack, and a protective plate is fixedly connected to one side of the rack. A limit strip is fixedly connected to one side of the protective plate, and a waterproof strip is fixedly connected to one side of the protective plate. A fixing strip is movably connected to the outer wall of the limit strip, and a power cord is fixedly connected to one side of the fixed shell.
[0007] Preferably, the fixing box is fixedly installed on the top of the battery box, and the battery box is fixedly connected to one side of the fixing shell. The fixing net is symmetrically installed around the top of the fixing box, and the water-absorbing resin particles are disposed on the top of the moving plate.
[0008] Preferably, connecting plates are fixedly connected to both sides of the movable conductive sheet, and a limiting post is movably connected inside the connecting plate. The limiting post is fixedly connected to the top of the battery box, and a spring is fixedly installed on the top of the battery box.
[0009] Preferably, the spring is fixedly installed between the connecting piece and the battery box, and the spring is sleeved outside the limiting post. The fixed conductive piece is fixedly connected to the top of the battery box, and the fixed conductive piece is vertically arranged at the bottom of the movable conductive piece. The top horizontal plane of the movable conductive piece is higher than the top horizontal plane of the limiting post.
[0010] Preferably, the movable conductive sheet and the fixed conductive sheet are connected in series with the battery box and the motor via connecting wires. The top of the motor is fixedly connected to the second mounting plate, and the second mounting plate is fixedly installed at the bottom of the fixed shell. The bottom of the fixed shell is fixedly connected to the first mounting plate, and both the first and second rotating shafts are rotatably installed between the first and second mounting plates.
[0011] Preferably, the protective components are symmetrically installed on both sides of the fixed shell, and two racks are respectively meshed on the top of gear one and gear two, the two racks are staggered, and the racks are movable inside the fixed strip.
[0012] Preferably, the limiting strips are symmetrically installed on both sides of the protective plate, and the limiting strips are movably disposed inside the fixing strip. The fixing strip is fixedly connected to the outside of the fixing shell. The protective plate is horizontally disposed on one side of the heat dissipation hole, and the waterproof strip is squeezed and disposed between the protective plate and the fixing shell. The bottom of the fixing shell is symmetrically installed with support plates, and the inner side of the support plates is fixedly connected with hanging ropes.
[0013] Compared with the prior art, the beneficial effects of this utility model are: the electric vehicle charger with short-circuit protection function;
[0014] 1. When encountering sudden severe weather while using an electric vehicle charger, rainwater enters the fixed box, causing the water-absorbing resin particles to quickly absorb water and expand. This causes the moving plate to press the moving conductive sheet against the fixed conductive sheet, making it conductive. This allows the motor to move the protective plate and seal it to the outside of the heat dissipation holes, thus preventing short circuits caused by water contact with the charger's internal electronic components. This prevents damage to the charger caused by short circuits, thereby increasing the short circuit protection function of the electric vehicle charger and extending its service life.
[0015] 2. The support plate facilitates raising the charger's operating height. When the charger is placed on the ground, the support plate can support it, preventing damp ground from affecting its normal operation. Additionally, the charging cable allows the charger to be hung on a vehicle, making it convenient to place the charger according to usage needs. This improves the flexibility of using electric vehicles and increases the practicality of the electric vehicle charger. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the electric component of this utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the protective component of this utility model;
[0019] Figure 4 This is a schematic diagram showing the disassembled structure of the control component of this utility model.
[0020] In the diagram: 1. Fixed shell; 2. Heat dissipation holes; 3. Control components; 31. Fixed box; 32. Fixed mesh; 33. Water-absorbing resin particles; 34. Moving plate; 35. Moving conductive sheet; 36. Connecting piece; 37. Limiting post; 38. Spring; 39. Fixed conductive sheet; 4. Electric component; 41. Battery box; 42. Motor; 43. Shaft 1; 44. Gear 1; 45. Gear 2; 46. Shaft 2; 47. Mounting plate 1; 48. Mounting plate 2; 5. Protective components; 51. Rack; 52. Protective plate; 53. Limiting strip; 54. Waterproof strip; 55. Fixing strip; 6. Support plate; 7. Hanging rope; 8. Power cord. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-4 This utility model provides a technical solution: a battery charger with short-circuit protection, including a fixed shell 1. Both sides of the fixed shell 1 have heat dissipation holes 2, and a control component 3 is installed on one side of the fixed shell 1. The control component 3 includes a fixed box 31, and a fixing net 32 is fixedly connected to the inner top of the fixed box 31. The interior of the fixed box 31 is filled with water-absorbing resin particles 33, and a movable plate 34 is movably connected to the interior of the fixed box 31. The fixed box 31 is fixedly installed on the top of a battery box 41, and the battery box 41 is fixedly connected to one side of the fixed shell 1. The fixing net 32 is symmetrically installed around the top of the fixed box 31, thus preventing rainwater from reaching the battery box. The absorbent resin particles 33 easily enter the fixed box 31, causing them to absorb water and expand, thereby improving the sensitivity of the control component 3 and the electric component 4. The absorbent resin particles 33 are located on the top of the movable plate 34, and a movable conductive sheet 35 is pressed onto the bottom of the movable plate 34. Connecting pieces 36 are fixedly connected to both sides of the movable conductive sheet 35, and a limiting post 37 is movablely connected inside the connecting piece 36. The limiting post 37 is fixedly connected to the top of the battery box 41, and a spring 38 is fixedly installed on the top of the battery box 41. A fixed conductive sheet 39 is attached to the bottom of the movable conductive sheet 35, and the spring 38 is fixedly installed on the connecting piece 36 and the battery box 41. Between 1 and 2, and the spring 38 is sleeved outside the limiting post 37, when the movable conductive sheet 35 is squeezed, the connecting piece 36 moves outside the limiting post 37, thereby facilitating the vertical limiting of the movable conductive sheet 35, and facilitating the accurate fitting of the movable conductive sheet 35 to the top of the fixed conductive sheet 39. After the water-absorbing resin particles 33 expand due to rainwater, if the charging is finished, the fixing net 32 can be removed and the water-absorbing resin particles 33 can be taken out and replaced with new water-absorbing resin particles 33. This structure is for emergency use, so the frequency of replacing the water-absorbing resin particles 33 will not be too high, thus meeting the needs of daily use. After the water-absorbing resin particles 33 are taken out, the elasticity of the spring 38 will cause the water-absorbing resin particles 33 to expand. The movable conductive plate 35 is reset upwards, thus facilitating the next use of the motor 42. The fixed conductive plate 39 is fixedly connected to the top of the battery box 41, and the fixed conductive plate 39 is vertically set at the bottom of the movable conductive plate 35. The top horizontal plane of the movable conductive plate 35 is higher than the top horizontal plane of the limiting post 37. The battery box 41 contains a battery and a circuit board. The circuit board controls the use of the motor 42. When the control component 3 triggers the use of the motor 42, the motor 42 moves the protective plate 52 to fit against the fixed shell 1 and then stops using it. After charging is completed, the user can manually reset the protective plate 52 to the outside, thus facilitating the next use of the electric component 4.
[0023] An electric component 4 is fixedly installed at the bottom of the control component 3. The electric component 4 includes a battery box 41, which is connected to a motor 42 via a connecting wire. One end of the output shaft of the motor 42 is fixedly connected to a rotating shaft 43. A gear 44 is fixedly connected to the outer wall of the rotating shaft 43, and a gear 45 meshes with one side of the gear 44. A rotating shaft 46 is fixedly connected to the inner wall of the gear 45. A movable conductive plate 35 and a fixed conductive plate 39 are connected in series with the battery box 41 and the motor 42 via connecting wires, thereby enabling the movable conductive plate 35 and the fixed conductive plate 39 to... When the conductive sheet 39 is attached, it can drive the motor 42 for use. The top of the motor 42 is fixedly connected to the mounting plate 2 48, and the mounting plate 2 48 is fixedly installed at the bottom of the fixed shell 1. The bottom of the fixed shell 1 is fixedly connected to the mounting plate 1 47, and the rotating shaft 1 43 and the rotating shaft 2 46 are both rotatably installed between the mounting plate 1 47 and the mounting plate 2 48. The top of the gear 2 45 is provided with a protective component 5, which includes a rack 51. A protective plate 52 is fixedly connected to one side of the rack 51, and a limit strip 5 is fixedly connected to one side of the protective plate 52. 3. A waterproof strip 54 is fixedly connected to one side of the protective plate 52, and a fixing strip 55 is movably connected to the outer wall of the limiting strip 53. The fixing strip 55 is designed to limit the rack 51 and the limiting strip 53, thereby facilitating the horizontal movement of the protective plate 52. The protective components 5 are symmetrically installed on both sides of the fixed shell 1, and the two racks 51 are respectively meshed on the top of gear 1 44 and gear 2 45. The two racks 51 are staggered to avoid collision when they move inward. The racks 51 are movably connected to the fixing strip 55. Inside the fixed shell 1, a power cord 8 is fixedly connected to one side. Limiting strips 53 are symmetrically installed on both sides of the protective plate 52, and the limiting strips 53 are movably disposed inside the fixing strip 55. The fixing strip 55 is fixedly connected to the outside of the fixed shell 1. The protective plate 52 is horizontally disposed on one side of the heat dissipation hole 2, and the waterproof strip 54 is squeezed and disposed between the protective plate 52 and the fixed shell 1. Support plates 6 are symmetrically installed at the bottom of the fixed shell 1, and a hanging rope 7 is fixedly connected to the inner side of the support plate 6. The arrangement of the support plate 6 and the hanging rope 7 increases the placement method of the charger when in use.
[0024] Working principle: When using this electric vehicle charger with short-circuit protection, place the support plate 6 on the ground to support the fixed shell 1, or hang the fixed shell 1 on the electric vehicle using the hanging rope 7. In rainy weather, rainwater enters the fixed box 31 through the fixed net 32, causing the water-absorbing resin particles 33 to absorb water and expand rapidly. Since the moving plate 34 is located inside the fixed box 31, the expansion of the water-absorbing resin particles 33 pushes the moving plate 34 downward, causing the moving plate 34 to press the moving conductive sheet 35 downward, thus adhering the moving conductive sheet 35 to the fixed conductive sheet 3. At the top, the battery box 41 is connected to the motor 42 via the movable conductive plate 35 and the fixed conductive plate 39. The motor 42 then drives the rotating shaft 43 and the gear 44 to rotate, which in turn drives the gear 45 to rotate. The two racks 51 at the top move relative to each other, thereby moving the protective plate 52 toward the heat dissipation hole 2. This causes the protective plate 52 to fit and press against the outside of the fixed shell 1, thus sealing the protective plate 52 against the outside of the heat dissipation hole 2 and preventing rainwater from entering the fixed shell 1 through the heat dissipation hole 2, which could cause short circuits in the internal electronic components.
[0025] 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 battery charger with short-circuit protection function, comprising a fixing shell (1), characterized in that: The fixed shell (1) has heat dissipation holes (2) on both sides, and a control component (3) is installed on one side of the fixed shell (1). The control component (3) includes a fixed box (31), and a fixed mesh (32) is fixedly connected to the top inner side of the fixed box (31). The fixed box (31) is filled with water-absorbing resin particles (33), and a movable plate (34) is movably connected to the inside of the fixed box (31). A movable conductive sheet (35) is squeezed and disposed at the bottom of the movable plate (34), and a fixed conductive sheet (39) is attached to the bottom of the movable conductive sheet (35). An electric component (4) is fixedly installed at the bottom of the control component (3), and the electric component (4) includes a battery box (41). The battery box (41) is connected to a motor (42) via a connecting wire, and a rotating shaft (43) is fixedly connected to one end of the output shaft of the motor (42). A gear (44) is fixedly connected to the outer wall of the rotating shaft (43), and a gear (45) meshes with one side of the gear (44). A rotating shaft (46) is fixedly connected to the inner wall of the gear (45), and a protective component (5) is provided on the top of the gear (45). The protective component (5) includes a rack (51), and a protective plate (52) is fixedly connected to one side of the rack (51). A limit strip (53) is fixedly connected to one side of the protective plate (52), and a waterproof strip (54) is fixedly connected to one side of the protective plate (52). A fixing strip (55) is movably connected to the outer wall of the limit strip (53), and a power cord (8) is fixedly connected to one side of the fixed shell (1).
2. A battery charger with short-circuit protection function according to claim 1, characterized in that, The fixing box (31) is fixedly installed on the top of the battery box (41), and the battery box (41) is fixedly connected to one side of the fixing shell (1). The fixing net (32) is symmetrically installed around the top of the fixing box (31), and the water-absorbing resin particles (33) are set on the top of the moving plate (34).
3. A battery charger with short-circuit protection function according to claim 1, characterized in that, Both sides of the movable conductive sheet (35) are fixedly connected to connecting pieces (36), and the interior of the connecting piece (36) is movably connected to a limiting post (37). The limiting post (37) is fixedly connected to the top of the battery box (41), and a spring (38) is fixedly installed on the top of the battery box (41).
4. A battery charger with short-circuit protection function according to claim 3, characterized in that, The spring (38) is fixedly installed between the connecting piece (36) and the battery box (41), and the spring (38) is sleeved on the outside of the limiting post (37). The fixed conductive piece (39) is fixedly connected to the top of the battery box (41), and the fixed conductive piece (39) is vertically arranged at the bottom of the movable conductive piece (35). The top horizontal plane of the movable conductive piece (35) is higher than the top horizontal plane of the limiting post (37).
5. A battery charger with short-circuit protection function according to claim 1, characterized in that, The movable conductive sheet (35) and the fixed conductive sheet (39) are connected in series with the battery box (41) and the motor (42) via connecting wires. The top of the motor (42) is fixedly connected to the second mounting plate (48), and the second mounting plate (48) is fixedly installed at the bottom of the fixed shell (1). The bottom of the fixed shell (1) is fixedly connected to the first mounting plate (47), and the first rotating shaft (43) and the second rotating shaft (46) are both rotatably installed between the first mounting plate (47) and the second mounting plate (48).
6. A battery charger with short-circuit protection function according to claim 1, characterized in that, The protective components (5) are symmetrically installed on both sides of the fixed shell (1), and the two racks (51) are respectively meshed on the top of the first gear (44) and the second gear (45). The two racks (51) are interleaved and the racks (51) are movably disposed inside the fixed strip (55).
7. A battery charger with short-circuit protection function according to claim 1, characterized in that, The limiting strip (53) is symmetrically installed on both sides of the protective plate (52), and the limiting strip (53) is movably disposed inside the fixing strip (55). The fixing strip (55) is fixedly connected to the outside of the fixing shell (1). The protective plate (52) is horizontally disposed on one side of the heat dissipation hole (2), and the waterproof strip (54) is squeezed and disposed between the protective plate (52) and the fixing shell (1). The bottom of the fixing shell (1) is symmetrically installed with a support plate (6), and a hanging rope (7) is fixedly connected to the inner side of the support plate (6).