Anti-sparking integrated cover plate structure
By designing a combination solution of limiting components and heat dissipation holes in the integrated cover plate, the ignition problem caused by loosening of the aluminum row during vibration is solved, and effective fixation of the aluminum row and effective discharge of heat is achieved, avoiding the occurrence of local high temperatures.
Patent Information
- Application Number
- CN202420854333.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-24
AI Technical Summary
When the existing integrated cover plate vibrates, the aluminum row is prone to loosening, resulting in a decrease in contact area, an increase in contact resistance, and a large amount of heat, which may cause local high temperatures or ignition.
An integrated cover structure that is anti-fire-resistant is designed, using limit components to fix the aluminum row, including limit insertion rods and pressing blocks, ensuring that the aluminum row is limited in both horizontal and vertical directions and avoid loosening. Meanwhile, a heat dissipation hole is provided on the inner wall of the positioning groove to discharge heat, and an S-shaped cross-section is provided on the heat dissipation hole to prevent dust from entering.
By fixing the limiting component, the probability of aluminum row loosening is reduced and the occurrence of ignition is reduced. The setting of the heat dissipation holes effectively slows down the temperature increase at the aluminum tray and avoids the occurrence of local high temperatures.
Smart Images
Figure CN222654223U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric bicycles, in particular to an anti-fire integrated cover plate structure. Background Art
[0002] The integrated cover is an important component of the battery module in electric vehicles. It is generally composed of a wiring harness, an injection molded part, and an aluminum bar. The injection molded part is generally designed with a groove for accommodating the aluminum bar. It can not only intuitively show the installation position of the aluminum bar, but also limit the aluminum bar to prevent adjacent aluminum bars from contacting each other. However, when electric vehicles are traveling in places with poor road conditions, the vibration on the vehicle will be more serious. The aluminum bar affected by the vibration is prone to loosening, resulting in a reduction in the contact area between it and the wiring harness, thereby increasing the contact resistance between it and the wiring harness. When the current passes through these areas, it will be hindered, and then a large amount of heat will be generated. This heat accumulation to a certain extent may cause local high temperature and even sparking. In view of this, we propose an integrated cover structure that prevents sparking. Utility Model Content
[0003] The utility model aims to solve the problem that the aluminum row inside the existing integrated cover plate is easily loosened due to vibration when in use, thereby causing local high temperature, and proposes an anti-fire integrated cover plate structure.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] An anti-fire integrated cover plate structure comprises an injection molded plate and a positioning groove provided on the injection molded plate, an aluminum bar is placed in the positioning groove, a wiring harness is provided on the injection molded plate, and one end of the wiring harness is welded to the aluminum bar, and a limit assembly for limiting the movement of the aluminum bar is provided in the positioning groove;
[0006] The limiting assembly includes a limiting rod fixedly installed in the positioning groove, and the outside of the limiting rod is slidably connected to the aluminum bar, the limiting rod is provided with a receiving groove, a receiving plate is rotatably installed in the upper part of the receiving groove, and the rotating end of the receiving plate is away from the axial position of the limiting rod, the outside of the receiving plate is slidably connected to the receiving groove, and a pressing block is fixedly installed at one end of the receiving plate, and the diameter of the limiting rod is equal to the sum of the width of the pressing block and the width of the receiving plate.
[0007] Preferably, the diameter of the containing groove is funnel-shaped, wide at both ends and narrow in the middle, and the thickness of the containing plate is smaller than the width of the middle of the containing groove.
[0008] Preferably, a fixed pressing plate for pressing the wiring harness is provided on the injection molding plate, a rotating shaft rotatably connected to the injection molding plate is fixedly mounted on one end of the fixed pressing plate, and a fixed protrusion is fixedly mounted on the other end of the fixed pressing plate.
[0009] Preferably, a heat dissipation hole communicating with the outside is provided on the inner wall of the positioning groove.
[0010] Preferably, the upper cross-section of the heat dissipation hole is S-shaped.
[0011] Preferably, a flame retardant layer is provided on the inner wall of the positioning groove, and the flame retardant layer is filled with flame retardant cotton.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. The utility model fixes the aluminum bar by setting the limit assembly, reduces the loosening of the aluminum bar due to the vibration of the electric vehicle, and limits the horizontal and vertical directions of the aluminum bar by setting the limit rod and the pressing block, reducing the sparking phenomenon caused by the loosening of the aluminum bar.
[0014] 2. The utility model can discharge the heat generated by the aluminum bar when it is working by setting the heat dissipation holes, slow down the temperature rise of the aluminum bar, and avoid the occurrence of local high temperature. The setting of the S-shaped upper section can prevent dust from directly entering the positioning groove, thereby improving the protection of the aluminum bar. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0016] Figure 2 for Figure 2 A schematic diagram of the enlarged structure of the middle A area;
[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the middle B area;
[0018] Figure 4 This is a cross-sectional view of the limit rod of the utility model.
[0019] In the figure: 1. injection molding plate; 2. positioning groove; 3. aluminum bar; 4. wiring harness; 5. flame retardant layer; 6. fixed pressure plate; 61. rotating shaft; 62. fixed protrusion; 7. heat dissipation hole; 8. limit assembly; 81. limit rod; 82. receiving groove; 83. receiving plate; 84. pressing block. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] At present, the battery modules on electric vehicles basically use laser welding technology to connect the aluminum bars of the integrated cover to the battery poles to achieve a protective effect. However, when the vehicle is vibrated, the position of the aluminum bars is easily shifted, thereby reducing the contact area between the aluminum bars and the wire speed, thereby increasing the contact resistance between them and the wiring harness. When the current passes through these areas, it will be hindered, thereby generating a large amount of heat. When this heat accumulates to a certain extent, it may cause local high temperature and even sparks. In order to reduce the probability of ignition of the integrated cover, we have proposed the following solutions.
[0022] Embodiment 1
[0023] Reference Figure 1-Figure 4 A fire-proof integrated cover plate structure is mainly composed of an injection molding plate 1 and a positioning groove 2 opened on the injection molding plate 1, an aluminum bar 3 is placed in the positioning groove 2, a wiring harness 4 is provided on the injection molding plate 1, and one end of the wiring harness 4 is welded to the aluminum bar 3, and a limiting component 8 for limiting the movement of the aluminum bar 3 is provided in the positioning groove 2. During assembly, the aluminum bar 3 can be placed in the positioning groove 2 first, and then fixed by the limiting component 8 to reduce the probability of loosening of the aluminum bar 3 due to vibration, and then one end of the wire harness 4 is welded to the aluminum bar 3 to complete the assembly work.
[0024] When the battery module installed on the electric vehicle is driving on a bumpy road, it will cause the integrated cover plate to vibrate together, and then the aluminum bar 3 set in the integrated cover plate will easily come out and come into contact with the adjacent aluminum bar 3. When in contact, a current short circuit may occur. The current short circuit will cause the current to suddenly increase, generate heat and electromagnetic force, which may cause sparks or flames. In addition, when the aluminum bar 3 is loose, it may reduce the contact area with the wiring harness 4, increase the contact resistance between it and the wiring harness 4, make the current flow inconvenient, generate a lot of heat, and cause local high temperature. In view of the above defects, this embodiment achieves the horizontal and vertical limit of the aluminum bar 3 through the setting of the limit component 8, reducing the spark phenomenon caused by the looseness of the aluminum bar 3. The detailed implementation method is as follows:
[0025] The limiting assembly 8 includes a limiting plug rod 81 fixedly installed in the positioning groove 2, and the outside of the limiting plug rod 81 is slidably connected to the aluminum bar 3. A receiving groove 82 is opened on the limiting plug rod 81, and a receiving plate 83 is rotatably installed in the upper part of the receiving groove 82, and the rotating end of the receiving plate 83 is away from the axial position of the limiting plug rod 81. The outside of the receiving plate 83 is slidably connected to the receiving groove 82, and a pressing block 84 is fixedly installed at one end of the receiving plate 83. The diameter of the limiting plug rod 81 is equal to the sum of the width of the pressing block 84 and the width of the receiving plate 83. When placing the aluminum bar 3, it is necessary to align the limiting hole on the aluminum bar 3 with the limiting plug rod 81, and then place the aluminum bar 3 into the positioning groove 2. The setting of the limiting plug rod 81 can limit the movement of the aluminum row 3 on the horizontal plane, and then the accommodating plate 83 is rotated to insert the lower part of it into the accommodating groove 82. Since the rotating end of the accommodating plate 83 is far away from the axial position of the limiting plug rod 81, and the diameter of the limiting plug rod 81 is equal to the sum of the width of the pressing block 84 and the width of the accommodating plate 83, the pressing block 84 cannot enter the accommodating groove 82 during the rotation process, and its bottom will squeeze the aluminum row 3, limiting the upward movement of the aluminum row 3, avoiding the risk of the aluminum row 3 being affected by vibration and escaping from the positioning groove 2 and contacting the adjacent aluminum row 3, thereby achieving the fixation of the aluminum row 3 and reducing the spark caused by the loosening of the aluminum row 3.
[0026] The diameter of the receiving groove 82 is funnel-shaped, wide at both ends and narrow in the middle, and the thickness of the receiving plate 83 is less than the width of the middle part of the receiving groove 82. Because the receiving groove 82 is wide at both ends and narrow in the middle, and the thickness of the receiving plate 83 is less than the width of the middle part of the receiving groove 82, when the receiving plate 83 is squeezed into the receiving groove 82, the inner wall of the receiving groove 82 will simultaneously squeeze the receiving plate 83, so that the friction resistance between the receiving plate 83 and the receiving groove 82 is large, and it is not easily affected by external force, which is convenient to detach from the receiving groove 82, thereby improving the stability of the fixation of the aluminum bar 3.
[0027] The injection molding plate 1 is provided with a fixed pressing plate 6 for pressing the wiring harness 4. A rotating shaft 61 rotatably connected to the injection molding plate 1 is fixedly installed at one end of the fixed pressing plate 6, and a fixed protrusion 62 is fixedly installed at the other end. When the vehicle vibrates, the wiring harness 4 will also be driven to move synchronously. If the wiring harness 4 is displaced, the contact area between it and the aluminum row 3 will also be reduced. Because the contact resistance is inversely proportional to the contact area, the larger the contact area, the smaller the contact resistance, and conversely, the smaller the contact area, the greater the contact resistance. Therefore, when the contact area between the aluminum row 3 and the wiring harness 4 is reduced, the contact resistance will increase accordingly, making it inconvenient for current to flow, generating a large amount of heat, and causing local high temperature. In severe cases, sparks may occur. In this embodiment, the wiring harness 4 can be suppressed by setting the fixed pressing plate 6 to avoid loosening during use and causing unnecessary failures. In addition, the setting of the fixed protrusion 62 can prevent the wiring harness 4 from deviating from the suppression of the fixed pressing plate 6.
[0028] Embodiment 2
[0029] On the basis of Example 1, the technical solution proposed in Example 1 is used to solve the disadvantage that the aluminum row 3 inside the existing integrated cover plate is easily loosened due to vibration when in use, thereby causing local high temperature. However, electronic equipment generally generates heat when running. When this heat accumulates in one place and is not discharged, it may cause local high temperature and cause equipment failure.
[0030] Reference Figure 1-Figure 4 A heat dissipation hole 7 connected to the outside is provided on the inner wall of the positioning groove 2. In this embodiment, the setting of the heat dissipation hole 7 facilitates the discharge of heat, slows down the temperature increase of the aluminum bar 3, and avoids the occurrence of local high temperature.
[0031] The cross section of the heat dissipation hole 7 is S-shaped. The setting of the heat dissipation hole 7 is not only convenient for the discharge of heat, but also convenient for external dust to enter the positioning groove 2. Such dust is easy to adhere to the aluminum bar 3 to form a heat preservation layer, which hinders the dissipation of heat, causes the temperature of the aluminum bar 3 to rise, and further affects its normal operation. In this embodiment, the S-shaped cross section of the heat dissipation hole 7 is set so that dust cannot directly enter the positioning groove 2, but is isolated from the heat dissipation hole 7 by the inner wall of the heat dissipation hole 7, thereby facilitating the heat dissipation of the aluminum bar 3. Similarly, if sparking really occurs at the positioning groove 2, the S-shaped heat dissipation hole 7 will also prevent sparks from flowing out of the heat dissipation hole 7 and igniting surrounding objects.
[0032] A flame retardant layer 5 is provided on the inner wall of the positioning groove 2, and the flame retardant layer 5 is filled with flame retardant cotton. Figure 1 As shown, a flame retardant layer 5 is provided on the inner wall of the positioning groove 2 . The provision of the flame retardant layer 5 increases the flame retardant performance of the injection molded plate 1 , effectively prevents the spread and propagation of flames, and improves the fire resistance time of the injection molded plate 1 .
[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An integrated cover plate structure for preventing fire, comprising an injection molded plate (1), and a positioning groove (2) provided on the injection molded plate (1), an aluminum bar (3) being placed in the positioning groove (2), a wiring harness (4) being provided on the injection molded plate (1), and one end of the wiring harness (4) being welded to the aluminum bar (3), characterized in that: The positioning groove (2) is provided with a limiting component (8) for limiting the movement of the aluminum bar (3); The limiting assembly (8) comprises a limiting plug rod (81) fixedly mounted in the positioning groove (2), and the outside of the limiting plug rod (81) is slidably connected to the aluminum bar (3), the limiting plug rod (81) is provided with a receiving groove (82), a receiving plate (83) is rotatably mounted in the upper part of the receiving groove (82), and the rotating end of the receiving plate (83) is away from the axial position of the limiting plug rod (81), the outside of the receiving plate (83) is slidably connected to the receiving groove (82), and a pressing block (84) is fixedly mounted on one end of the receiving plate (83), and the diameter of the limiting plug rod (81) is equal to the sum of the width of the pressing block (84) and the width of the receiving plate (83).
2. The anti-fire integrated cover structure according to claim 1, characterized in that: The diameter of the receiving groove (82) is funnel-shaped, wide at both ends and narrow in the middle, and the thickness of the receiving plate (83) is smaller than the width of the middle portion of the receiving groove (82).
3. The fire-proof integrated cover structure according to claim 1, characterized in that: The injection molding plate (1) is provided with a fixed pressing plate (6) for pressing the wiring harness (4); one end of the fixed pressing plate (6) is fixedly mounted with a rotating shaft (61) rotatably connected to the injection molding plate (1), and the other end is fixedly mounted with a fixed protrusion (62).
4. The fire-proof integrated cover plate structure according to claim 1, characterized in that: A heat dissipation hole (7) communicating with the outside is provided on the inner wall of the positioning groove (2).
5. The fire-proof integrated cover structure according to claim 4, characterized in that: The upper cross section of the heat dissipation hole (7) is S-shaped.
6. The fire-proof integrated cover structure according to claim 1, characterized in that: A flame retardant layer (5) is provided on the inner wall of the positioning groove (2), and the flame retardant layer (5) is filled with flame retardant cotton.