Battery pack light guide assembly and battery pack
By welding in the light guide assembly of the battery pack to form a confined space, the problem of traditional battery packs increasing production costs and reducing assembly efficiency when realizing waterproof and dustproof functions is solved, and efficient and economical waterproof and dustproof effect is achieved.
Patent Information
- Application Number
- CN202421403080.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-18
AI Technical Summary
When traditional battery packs realize waterproof and dustproof function, the use of sealing auxiliary materials increases production costs and reduces assembly efficiency.
By designing a battery-pack light guide assembly, in which the housing is welded to the main body of the light guide member to form a closed space, the first light guide column is arranged in the through hole of the housing, and is welded to the housing by using a closed ring convex strip to form a confined space to avoid the entry of external foreign matter or water.
It achieves the effect of waterproofing and dustproof without the use of sealing auxiliary materials, reduces production costs, and improves assembly efficiency through laser welding.
Smart Images
Figure CN222651322U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a battery pack light guide assembly and a battery pack. Background Art
[0002] In the case where there is no screen on the electronic product itself, it is a common design solution for the battery of the electronic product to use LED lights as an indicator of the power status so that users can quickly identify the power status of the electronic product. The light guide plays a key role as a component that conducts the LED light source on the PCB board in the battery pack to the appearance of the electronic product.
[0003] However, in traditional designs, after the battery shell and the light guide column are joined together using a snap-fit joint structure, a hot melt column structure, or an ultrasonic welding structure, if waterproof and dustproof functions are required, the aforementioned structures are used in conjunction with additional sealing materials such as waterproof double-sided tape, waterproof glue, or sealing rings to achieve the purpose of waterproof and dustproof. In traditional designs, in order to make the battery waterproof and dustproof, the use of sealing materials not only increases the production cost of the battery, but also reduces the assembly efficiency between the battery pack shell and the light guide column. Utility Model Content
[0004] The main purpose of the present application is to provide a battery pack light guide assembly and a battery pack, so as to at least solve the problem in the background technology that in order to make the battery waterproof and dustproof, the use of sealing auxiliary materials not only increases the production cost of the battery, but also reduces the assembly efficiency between the battery pack shell and the light guide column.
[0005] According to one aspect of the present application, a battery pack light guide assembly is provided, characterized in that it includes:
[0006] A shell, wherein a first through hole is formed in the shell;
[0007] A light guide, the light guide comprising a main body and a first light guide column, the first light guide column is arranged on the main body and at least partially penetrates the first through hole;
[0008] The main body is welded to the shell, and a closed space is defined between the main body and the shell, and a portion of the first light guide column located between the main body and the shell is located within the closed space.
[0009] Furthermore, it also includes:
[0010] A closed ring convex strip is arranged on a side of the shell close to the main body and surrounds the outer periphery of the first through hole. The closed ring convex strip is welded to the main body. The closed ring convex strip, the main body and the shell form the enclosed space.
[0011] Furthermore, the closed-loop convex strips include a plurality of strips, and along the radial direction of the first through hole, the plurality of closed-loop convex strips are arranged on the shell at intervals, and the plurality of closed-loop convex strips all surround the outer circumference of the first through hole.
[0012] Furthermore, a first gap is provided between the first light guide column and the closed-ring convex strip.
[0013] Further, along the axial direction of the first through hole, a second gap is provided between the shell and the main body.
[0014] Furthermore, along the axial direction of the first through hole, the height of the closed-loop convex strip is between 0.1 mm and 0.5 mm.
[0015] Furthermore, along a direction perpendicular to the axial direction of the first through hole, a width of the closed-loop convex strip is between 0.77 mm and 1.47 mm.
[0016] Furthermore, a positioning structure is provided between the main body and the shell, and the positioning structure is located outside the enclosed space.
[0017] Furthermore, the first light guide column is arranged on a side of the main body close to the housing, and the light guide member further comprises:
[0018] A second light guide column is disposed on a side of the main body away from the housing and is connected to the first light guide column.
[0019] According to another aspect of the present application, a battery pack is provided, and the battery pack includes the battery pack light guide assembly.
[0020] The battery pack light guide assembly provided in the present application includes a shell and a light guide member, wherein the first light guide column of the light guide member is arranged on the main body of the light guide member and at least partially penetrates the first through hole of the shell to guide the light source to the outside of the shell through the first light guide column in the first through hole. Among them, the main body is welded to the shell, and there is a closed space between the main body and the shell, and the first light guide column and the first through hole are both located in the closed space. Since the battery cell module, the power display light source, etc. are placed inside the shell, the closed space isolates the first light guide column and the first through hole from the inside of the shell, thereby preventing external foreign matter or water from invading the inside of the battery pack product. Therefore, the battery pack light guide assembly provided in the present application does not need to use sealing auxiliary materials, so that the battery pack using the battery pack light guide assembly can achieve the purpose of waterproof and dustproof, thereby reducing the production cost of the battery pack. At the same time, since the first light guide column and the first through hole can be covered in the closed space while the main body and the shell are welded, the assembly time between the light guide member and the shell can be greatly reduced, that is, the assembly efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0022] Figure 1 This is an exploded schematic diagram of a battery pack light guide assembly in one embodiment of the utility model;
[0023] Figure 2 for Figure 1 Schematic diagram from another angle;
[0024] Figure 3 This is a front view of the light guide assembly of the battery pack;
[0025] Figure 4 for Figure 3 AA section view;
[0026] Figure 5 for Figure 3 Bottom view of
[0027] Figure 6 for Figure 5 BB cross-sectional view;
[0028] Figure 7 for Figure 4 and Figure 6 A magnified schematic diagram of part C;
[0029] Figure 8 A cross-sectional view of the shell.
[0030] The above drawings include the following reference numerals:
[0031] 10. Shell; 11. First through hole; 12. Closed ring convex strip; 121. Second gap; 20. Light guide; 21. Main body; 22. First light guide column; 221. First gap; 23. Second light guide column; 30. Positioning structure; 31. Positioning hole; 32. Positioning column. DETAILED DESCRIPTION
[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0035] In traditional design schemes, in order to make the battery waterproof and dustproof, after the battery shell and the light guide column are connected by a snap joint structure, a hot melt column structure or an ultrasonic welding structure, it is necessary to apply waterproof double-sided tape, apply waterproof glue or use sealing rings and other sealing auxiliary materials to prevent external foreign matter (such as dust, small garbage, etc.) or water from invading the battery product to achieve the purpose of waterproof and dustproof. However, the use of sealing auxiliary materials not only increases the production cost of the battery, but also reduces the assembly efficiency between the battery pack shell and the light guide column.
[0036] In view of the above problems, the first embodiment of the present utility model provides a battery pack light guide assembly, see Figures 1 to 8 , the light guide assembly includes a shell 10 and a light guide member 20. The battery pack light guide assembly is arranged on the battery pack. When the battery pack also includes a battery cell module and a power display light source (such as an LED lamp), a accommodating cavity may be arranged in the shell 10, and the battery cell module and the power display light source electrically connected to the battery cell module are both installed in the accommodating cavity. A first through hole 11 is provided on the shell 10. In this embodiment, there may be one or more first through holes 11, and the number of first through holes 11 may be determined according to actual needs. The light guide member 20 includes a main body 21 and a first light guide column 22. The first light guide column 22 is arranged on the main body 21 and at least partially penetrates the first through hole 11, so that the light guide member 20 can transmit the light emitted by the power display light source along the first through hole 11 to the outside of the battery pack through the first light guide column 22.
[0037] Among them, the main body 21 of the light guide 20 is welded to the shell 10, and there is a closed space between the main body 21 and the shell 10, and the part of the first light guide column 22 located between the main body 21 and the shell 10 is located in the closed space. As a result, it is not easy for external foreign matter or water to enter the accommodating cavity inside the shell 10 along the gap between the first through hole 11 and the first light guide column 22. When the main body 21 and the shell 10 are welded, a closed space is obtained to isolate the inside and outside of the shell 10. While the closed space is waterproof and dustproof, it improves the assembly efficiency between the shell 10 and the light guide 20. Moreover, in this embodiment, the main body 21 and the shell 10 can be welded by laser welding. Since laser welding has a high degree of accuracy and control ability, it can achieve micron-level precise welding, ensure that heat is only concentrated in the area where welding is required, and reduce the thermal impact on the non-welding area of the main body 21 and the shell 10, so that the original strength and integrity of the main body 21 and the shell 10 can be maintained, and then the bonding strength and stability between the light guide 20 and the shell 10 can be improved.
[0038] It can be seen that the battery pack light guide assembly provided in this embodiment includes a shell 10 and a light guide 20, and the first light guide column 22 of the light guide 20 is arranged on the main body 21 of the light guide 20 and at least partially penetrates the first through hole 11 of the shell 10, so as to guide the light source through the first light guide column 22 in the first through hole 11 to the outside of the shell 10. Among them, the main body 21 is welded to the shell 10, and there is a closed space between the main body 21 and the shell 10, and the first light guide column 22 and the first through hole 11 are both located in the closed space. Since the battery module, the power display light source, etc. are placed inside the shell 10, the closed space isolates the first light guide column 22 and the first through hole 11 from the inside of the shell 10, thereby preventing external foreign matter or water from invading the inside of the battery pack product, and preventing the battery module and the power display light source from being eroded by external foreign matter or water. Therefore, the battery pack light guide assembly provided in the present application can achieve the purpose of waterproofing and dustproofing for the battery pack using the battery pack light guide assembly without using sealing auxiliary materials, thereby reducing the production cost of the battery pack. At the same time, since the first light guide column 22 and the first through hole 11 can be enclosed in a closed space while the main body 21 and the shell 10 are welded, the assembly time between the light guide 20 and the shell 10 can be greatly reduced, thereby improving the assembly efficiency between the light guide 20 and the shell 10.
[0039] like Figure 2As shown, the light guide assembly in this embodiment further includes a closed annular convex strip 12, which is disposed on one side of the housing 10 close to the main body 21 and surrounds the outer periphery of the first through hole 11. The closed annular convex strip 12 is welded to the main body 21, and the closed annular convex strip 12, the main body 21 and the housing 10 form a closed space. In this embodiment, after the housing 10 and the main body 21 of the light guide 20 are tightly welded by the closed annular convex strip 12, the first light guide column 22 and the first through hole 11 can be located in the closed space, and the battery pack can be waterproof and dustproof without the need for auxiliary sealing materials. Moreover, after the closed-loop convex strip 12 is joined to the main body 21 by laser welding, the closed-loop convex strip 12 can be precisely welded, so that only the closed-loop convex strip 12 can absorb the laser energy and melt. After the closed-loop convex strip 12 melts, the main body 21 of the light guide 20 sinks in the direction close to the closed-loop convex strip 12 under the action of pressing. When the sinking amount reaches the predetermined design value, the laser welding equipment is controlled to stop the laser irradiation and pressing action. After the closed-loop convex strip 12 cools down, it can be tightly fitted with the main body 21 of the light guide 20. The airtightness of the enclosed space formed by the close fitting of the main body 21 and the closed-loop convex strip 12 is good, so that the enclosed space meets the performance requirements of dustproof and waterproof. At the same time, since the laser is only concentrated on the closed-loop convex strip 12 area that needs to be welded, the thermal impact on other areas of the main body 21 and the shell 10 can be reduced, so that the original strength and integrity of the main body 21 and the shell 10 can be maintained, and the bonding strength and stability between the light guide 20 and the shell 10 can be improved.
[0040] In order to further improve the airtightness between the internal accommodating cavity of the shell 10 and the external environment, and prevent foreign matter or water in the external environment from entering the shell 10, the closed annular ridges 12 in this embodiment include multiple (such as two, three, four, five, etc.), and along the radial direction of the first through hole 11, multiple closed annular ridges 12 are arranged on the shell 10 at intervals, and the multiple closed annular ridges 12 surround the outer periphery of the first through hole 11. Therefore, after the closed annular ridges 12 close to the first through hole 11 are enclosed with the main body 21 and the shell 10 to form a closed space, one or more closed channels surrounding the closed space will be formed between the closed annular ridges 12 that are arranged outside the closed space at intervals. These closed channels will further prevent foreign matter or water from entering the shell 10, thereby further improving the sealing and safety of the battery pack.
[0041] See also Figure 7In this embodiment, there is a first gap 221 between the first light guide column 22 and the closed-loop ridge 12. Along the axial direction of the first through hole 11, there is a second gap 121 between the shell 10 and the main body 21. In the process of laser welding the closed-loop ridge 12 on the shell 10, the closed-loop ridge 12 absorbs the laser heat and forms a molten state, and the main body 21 is pressed with the closed-loop ridge 12 in a direction close to the shell 10 under the action of the pressing force. In the process of pressing the main body 21 and the closed-loop ridge 12, the closed-loop ridge 12 in a molten state diffuses and flows into the first gap 221 and / or the second gap 121, that is, the space of the first gap 221 and / or the second gap 121 can accommodate the melt of the closed-loop ridge 12 after it diffuses, and when the diffused melt cools, the closed-loop ridge 12 is moved along the axial direction of the first through hole 11 (such as Figure 4 , Figures 6 to 8 The height of the first through hole 11 is reduced in the direction indicated by the arrow Y, but in the direction perpendicular to the axial direction of the first through hole 11 (such as Figure 4 , Figures 6 to 8 The width of the closed-loop protrusion 12 (in the direction indicated by the arrow X in the middle) is increased, so that when the light guide 20 and the housing 10 are joined, the joining area between the closed-loop protrusion 12 and the main body 21 is larger due to the increase in the width of the closed-loop protrusion 12, thereby increasing the joining strength between the light guide 20 and the housing 10. The existence of the first gap 221 and the second gap 121 in this embodiment not only meets the high-strength welding requirements between the housing 10 and the main body 21, but also, since the gap sizes of the first gap 221 and the second gap 121 are specially adjusted and set during the welding process, they are not features retained by the welding process, but are deliberately done, the first gap 221 and the second gap 121 can prevent the housing 10 and the main body 21 from directly fitting, thereby preventing the housing 10 and the main body 21 from being squeezed against each other and deformed. At the same time, the existence of the first gap 221 and the second gap 121 can also increase the heat dissipation area of the housing 10 and the main body 21, and avoid the thermal impact of the laser on the main body 21 and the housing 10 during laser welding.
[0042] Specifically, in this embodiment, before the closed-loop protrusion 12 is welded to the light guide 20, the width of the closed-loop protrusion 12 gradually decreases in the direction close to the light guide 20 along the direction perpendicular to the axial direction of the first through hole 11. That is to say, the width of the closed-loop protrusion 12 close to the side of the housing 10 is wider, and after the closed-loop protrusion 12 is welded to the light guide 20, the contact area between the closed-loop protrusion 12 and the light guide 20 can be increased, thereby improving the tightness of the welding area between the closed-loop protrusion 12 and the light guide 20, thereby improving the airtightness of the enclosed space and the pulling force between the light guide 20 and the housing 10, so that the bonding strength between the light guide 20 and the housing 10 is stronger and the stability is better. Among them, along the direction perpendicular to the axial direction of the first through hole 11, the width (K) of the closed-loop protrusion 12 is between 0.3 mm and 1.0 mm. The width of the closed-loop convex strip 12 may specifically include one of 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, etc. Within this width range, the width of the closed-loop convex strip 12 can be adjusted according to the scene requirements of the product application, and this embodiment does not make a sole limitation. After the closed-loop convex strip 12 in the above width range absorbs laser energy to form a molten state and is pressed with the main body 21, it is ensured that there is a large contact area between the closed-loop convex strip 12 and the light guide 20, thereby improving the bonding strength and stability between the light guide 20 and the housing 10.
[0043] Specifically, before the closed-loop protrusion 12 is welded to the light guide 20, the cross section of the closed-loop protrusion 12 in this embodiment includes a trapezoidal surface, which is the cross section presented after the closed-loop protrusion 12 is cut along the axial direction of the first through hole 11. Figure 8 As shown, along the direction perpendicular to the axial direction of the first through hole 11, the side of the trapezoidal surface close to the main body 21 of the light guide 20 has a first width (K1), the first width is between 0.3mm and 0.8mm, and the side of the trapezoidal surface close to the housing 10 has a second width (K2), the second width is between 0.4mm and 0.9mm. The first width may specifically include one of 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc., and the second width may specifically include one of 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, etc.
[0044] Secondly, along the axial direction of the first through hole 11, the height (H) of the closed annular ridge 12 is between 0.1mm and 0.7mm. The height of the closed annular ridge 12 may specifically include one of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, etc. In the process of pressing and welding the closed annular ridge 12 with the main body 21, the closed annular ridge 12 located in the above-mentioned height range can flow and diffuse in the direction of the first gap 221 and / or the second gap 121 under the pressing of the main body 21, thereby increasing the contact area between the closed annular ridge 12 and the main body 21 after welding, and improving the bonding strength between the main body 21 and the shell 10. Moreover, this height range can also ensure that after the main body 21 and the closed annular ridge 12 are welded, the remaining height of the closed annular ridge 12 can be surrounded by the main body 21 and the shell 10 to form a closed space, so as to prevent foreign matter or water from entering the shell 10 through the closed space.
[0045] In one embodiment of the utility model, when the cross section of the closed annular convex strip 12 includes a trapezoidal surface, the first width of the trapezoidal surface can be set to 0.5mm, the second width can be set to 0.6mm, and the height of the trapezoidal surface along the axial direction of the first through hole 11 (i.e., the height of the closed annular convex strip 12) can be set to 0.3mm. Among them, the second width of 0.6mm is the basic thickness of the closed annular convex strip 12. The thicker the basic thickness (i.e., the larger the second width), the greater the contact area between the closed annular convex strip 12 and the main body 21 after welding, thereby improving the air tightness of the enclosed space and the pulling force between the main body 21 and the shell 10. The size of the first width can be reduced accordingly in accordance with the draft angle required when the closed annular convex strip 12 is set in the plastic mold, and the height of the trapezoidal surface can be used as the amount of sinking movement when the light guide 20 and the closed annular convex strip 12 are pressed together during laser welding, so as to ensure that there is a closed space between the main body 21 and the shell 10 after laser welding, while improving the bonding strength between the main body 21 and the shell 10.
[0046] In this embodiment, after the closed-ring convex strip 12 is crimped and fused with the main body 21 of the light guide 20 to form a closed space between the main body 21 and the shell 10, the first light guide column 22 on the light guide 20 that needs to conduct the light of the power display light source inside the shell 10 to the outside will be enclosed in the closed space to prevent external foreign matter or water from flowing into the battery pack through the gap between the first through hole 11 and the first light guide column 22, thereby achieving dustproof and waterproof performance requirements.
[0047] Among them, after the closed-loop convex strip 12 is welded to the main body 21 of the light guide 20, the height of the closed-loop convex strip 12 is between 0.1mm and 0.5mm along the axial direction of the first through hole 11. The height of the closed-loop convex strip 12 may specifically include one of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc. So that the closed-loop convex strip 12 can seal the first light guide column 22 of the light guide 20 in a closed space to achieve the purpose of waterproofing and dustproofing. In the direction perpendicular to the axial direction of the first through hole 11, the width of the closed-loop convex strip 12 is between 0.77mm and 1.47mm. The contact area between the closed-loop convex strip 12 and the main body 21 within this width range meets the bonding strength requirements between the main body 21 and the shell 10, thereby improving the firmness and stability of the main body 21 and the shell 10 after bonding. The width of the closed ring ridge 12 may specifically include one of 0.77mm, 0.80mm, 0.83mm, 0.85mm, 0.87mm, 0.89mm, 0.92mm, 0.96mm, 0.98mm, 1.00mm, 1.02mm, 1.05mm, 1.07mm, 1.09mm, 1.10mm, 1.13mm, 1.15mm, 1.17mm, 1.20mm, 1.23mm, 1.24mm, 1.27mm, 1.30mm, 1.34mm, 1.36mm, 1.38mm, 1.40mm, 1.41mm, 1.43mm, 1.45mm, 1.47mm and the like.
[0048] Specifically, when the first width of the trapezoidal surface is 0.5mm, the second width is 0.6mm, and the height of the closed-loop ridge 12 is 0.3mm, when the main body 21 sinks 0.2mm toward the shell 10 until the height of the first gap 221 and the second gap 121 along the axial direction of the first through hole 11 is only 0.1mm, the width of the closed-loop ridge 12 along the direction perpendicular to the axial direction of the first through hole 11 is 1.07mm. At this width, if the contact area between the closed-loop ridge 12 as a whole and the main body 21 is 50.432mm2, the joining pull-out force strength between the main body 21 and the shell 10 can reach 22N, ensuring the joining strength and connection stability between the main body 21 and the shell 10.
[0049] A positioning structure 30 is also provided between the main body 21 and the shell 10 in this embodiment, and the positioning structure 30 is located outside the confined space. Before laser welding is performed on the shell 10 and the main body 21, the shell 10 and the main body 21 can be preliminarily aligned by the positioning structure 30, so that at least a portion of the first light guide column 22 can be accurately and quickly inserted into the first through hole 11, and the main body 21 can be placed on the closed ring convex strip 12. The positioning structure 30 in this embodiment may include a positioning hole 31 and a positioning column 32, wherein the positioning hole 31 is provided on at least one of the main body 21 and the shell 10, and the positioning column 32 is provided on at least the other of the main body 21 and the shell 10, so that the shell 10 and the main body 21 can be preliminarily positioned by docking the positioning column 32 with the positioning hole 31, and the stability and welding effect of the main body 21 and the shell 10 can be improved to avoid cold welding.
[0050] The positioning structure 30 in this embodiment can also be a positioning groove and a positioning convex structure, as long as the shell 10 and the main body 21 of the light guide 20 can be preliminarily positioned. In this regard, the specific form of the positioning structure 30 can be adjusted accordingly according to actual conditions, and this embodiment does not make a sole limitation. After the light guide 20 is preliminarily assembled with the shell 10 through the positioning structure 30, there is surface contact between the main body 21 of the light guide 20 and the closed ring convex strip 12. Put the preliminarily assembled light guide 20 and shell 10 into the laser welding equipment, and press the light guide 20 and shell 10 with a glass fixture, adjust the laser power and parameters emitted by the laser welding equipment, use the closed ring convex strip 12 as the laser welding path, and start the laser welding equipment to automatically complete the laser welding operation between the light guide 20 and the closed ring convex strip 12. After the laser welding is completed, a waterproof and dustproof enclosed space can be formed between the light guide 20 and the shell 10, and the assembly is efficient.
[0051] During the welding process, the closed-loop ridge 12 absorbs laser energy and melts. At this time, the main body 21 of the light guide 20 begins to sink toward the shell 10. When the sinking amount reaches a predetermined design value, the laser welding equipment stops the laser irradiation and pressing action. After the closed-loop ridge 12 cools down, the closed-loop ridge 12 can fit tightly with the main body 21 and form a closed space between the main body 21 and the shell 10, so as to achieve the purpose of dustproof and waterproof through the closed space.
[0052] Among them, the closed-loop convex strip 12 on the shell 10 can be any convex strip that can absorb laser to achieve melting effect, such as the closed-loop convex strip 12 can specifically include polycarbonate convex strip (full name polycarbonate, referred to as PC), ABS convex strip (ABS is the abbreviation of Acrylonitrile Butadiene Styrene, referring to acrylonitrile-butadiene-styrene copolymer), polyethylene terephthalate convex strip, polypropylene convex strip, etc. At least one of the specific shape of the closed-loop convex strip 12 may include at least one of a circular convex strip, a rectangular convex strip, a diamond convex strip, etc., as long as the first through hole 11 can be enclosed and a waterproof and dustproof enclosed space can be formed after welding with the light guide 20. When the closed-loop convex strip 12 is a structure integrally formed with the shell 10, that is, the material of the shell 10 is the same as the material of the closed-loop convex strip 12, such as the shell 10 can specifically include at least one of a polycarbonate shell 10, an ABS shell 10, a polyethylene terephthalate shell 10, a polypropylene shell 10, etc.
[0053] That is to say, in this embodiment, laser welding equipment can be used to weld the contact area between the closed-loop ridge 12 on the shell 10 and the light guide 20, thereby improving the bonding strength and stability between the shell 10 and the light guide 20. In addition, laser welding can reduce the assembly time between the shell 10 and the light guide 20, improve production efficiency, and achieve high assembly efficiency. At the same time, the closed-loop ridge 12 is used as the welding path for laser welding to allow the shell 10 and the light guide 20 to have a closed space between the two that meets the waterproof and dustproof functions after welding, thereby eliminating the use of sealing auxiliary materials and reducing the production cost of the battery pack. In addition, since the light guide 20 itself is light-transmitting, there is no need to select special materials when using laser technology, and it has high adaptability.
[0054] The first light guide column 22 in this embodiment can be a light guide column structure that is arranged on the main body 21 along the axial direction of the first through hole 11. At this time, in this embodiment, the first light guide column 22 can be arranged at least partially in the first through hole 11 on the side close to the shell 10 to transmit the light source to the outside of the shell 10. Since the structure of the part of the first light guide column 22 that is arranged in the first through hole 11 needs to be compatible with the first through hole 11, the structure and size of the part of the light guide column structure located on the side of the main body 21 away from the shell 10 can be flexibly designed according to the light guiding effect. In this regard, the first light guide column 22 in this embodiment is arranged on the side of the main body 21 close to the shell 10, so that the first light guide column 22 can be located in a closed space after being arranged in the first through hole 11. The light guide 20 in this embodiment also includes a second light guide column 23, which is disposed on the side of the main body 21 away from the shell 10 and is connected to the first light guide column 22. Therefore, in this embodiment, the light source can be transmitted to the first light guide column 22 on the side of the main body 21 close to the shell 10 through the second light guide column 23, and then the light source is transmitted to the outside of the shell 10 through the portion of the first light guide column 22 passing through the first through hole 11. Specifically, the second light guide column 23 is arranged opposite to the power display light source in the shell 10, and the structure of the second light guide column 23 can be designed according to the positional relationship between it and the power display light source, such as making the second light guide column 23 at least partially bend or tilt in the direction of the power display light source, thereby ensuring that the second light guide column 23 can transmit the light source to the first light guide column 22, and then transmit the light source along the first through hole 11 to the outside of the battery pack through the first light guide column 22.
[0055] Therefore, this embodiment provides a new solution for joining the light guide 20 and the shell 10, using the positioning structure 30 and the closed-loop convex strip 12 and laser welding technology to tightly join the light guide 20 and the shell 10, which can achieve the purpose of reducing costs and increasing efficiency and improving the strength and stability of the joint. At the same time, when the laser welding path is the closed-loop convex strip 12, it is only necessary to ensure that the first light guide column 22 of the light guide 20 is located in the closed-loop convex strip 12 after passing through the first through hole 11. Without the need to use additional sealing auxiliary materials, the shell 10 and the light guide 20 are welded together through the closed-loop convex strip 12, so that the light guide component has dust and water resistance, reducing the production cost of the battery pack.
[0056] The second embodiment of the present invention provides a battery pack, which includes a battery pack light guide assembly. The structure of the battery pack light guide assembly and the technical effects achieved are specifically described in the first embodiment of the present invention, and will not be repeated in this embodiment.
[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A battery pack light guide assembly, characterized in that: include: A housing (10), wherein a first through hole (11) is formed on the housing (10); A light guide (20), the light guide (20) comprising a main body (21) and a first light guide column (22), the first light guide column (22) being arranged on the main body (21) and at least partially passing through the first through hole (11); The main body (21) and the shell (10) are welded, and a closed space is provided between the main body (21) and the shell (10), and a portion of the first light guide column (22) located between the main body (21) and the shell (10) is located within the closed space.
2. The battery pack light guide assembly according to claim 1, characterized in that: Also includes: A closed annular convex strip (12), the closed annular convex strip (12) is arranged on a side of the shell (10) close to the main body (21) and surrounds the outer periphery of the first through hole (11), the closed annular convex strip (12) and the main body (21) are welded, and the closed annular convex strip (12), the main body (21) and the shell (10) form the enclosed space.
3. The battery pack light guide assembly according to claim 2, characterized in that: The closed-loop convex strip (12) comprises a plurality of strips, and along the radial direction of the first through hole (11), the plurality of closed-loop convex strips (12) are arranged on the shell (10) at intervals, and the plurality of closed-loop convex strips (12) all surround the outer circumference of the first through hole (11).
4. The battery pack light guide assembly according to claim 2, characterized in that: A first gap (221) is provided between the first light guide column (22) and the closed-ring convex strip (12).
5. The battery pack light guide assembly according to any one of claims 2 to 4, characterized in that: Along the axial direction of the first through hole (11), a second gap (121) is provided between the housing (10) and the main body (21).
6. The battery pack light guide assembly according to any one of claims 2 to 4, characterized in that: Along the axial direction of the first through hole (11), the height of the closed-ring convex strip (12) is between 0.1 mm and 0.5 mm.
7. The battery pack light guide assembly according to any one of claims 2 to 4, characterized in that: Along a direction perpendicular to the axial direction of the first through hole (11), the width of the closed-ring convex strip (12) is between 0.77 mm and 1.47 mm.
8. The battery pack light guide assembly according to any one of claims 1 to 4, characterized in that: A positioning structure (30) is provided between the main body (21) and the shell (10), and the positioning structure (30) is located outside the enclosed space.
9. The battery pack light guide assembly according to any one of claims 1 to 4, characterized in that: The first light guide column (22) is arranged on a side of the main body (21) close to the housing (10), and the light guide member (20) further comprises: A second light guide column (23), the second light guide column (23) is arranged on a side of the main body (21) away from the housing (10) and is connected to the first light guide column (22).
10. A battery pack, characterized in that: The battery pack comprises the battery pack light guide assembly according to any one of claims 1 to 9.