Battery pack and electric equipment
By using EPDM rubber as the bonding and sealing layer in the lithium battery pack, combined with a heat shrink film sleeve and an insulating layer, the aging and operational complexity problems of the existing waterproof structure are solved, achieving an efficient and low-cost waterproof effect, reducing space occupancy and improving the appearance.
Patent Information
- Application Number
- CN202422721202.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The existing waterproof structure of lithium battery packs has problems such as electronic silicone easily aging, chemical reactions affecting the waterproof effect, aging of tape and complicated operation, resulting in poor waterproof effect and large space occupation.
EPDM rubber is used as the bonding and sealing layer, combined with a heat shrink film sleeve and an insulating layer, and bonding and sealing are achieved through heating treatment, forming an excellent waterproof effect, avoiding chemical reactions and reducing operational complexity.
It achieves excellent waterproofing effect, reduces labor costs, reduces structural space occupation, enhances ornamental value, and improves the practicality of the waterproof structure.
Smart Images
Figure CN223427608U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of battery manufacturing, and specifically relates to a battery pack and an electric device. Background Art
[0002] Existing simple-pack lithium battery packs are generally packaged through a heat shrink process of epoxy glass fiber board combined with polyvinyl chloride film, and electronic silicone or cloth-based adhesive and acetate tape are applied to the sealing between the epoxy glass fiber board and the polyvinyl chloride film to achieve waterproof requirements.
[0003] When electronic silicone is used for waterproofing, it is prone to aging. Some of its internal chemical components will react with other glues, affecting curing and resulting in failure to achieve the required waterproofing level. Furthermore, applying the glue is difficult and labor-intensive. A thick layer of silicone is required to achieve a waterproofing effect, which occupies a large amount of structural space. Furthermore, the appearance of the product after applying the electronic silicone is poor. When adhesive tape is used for waterproofing, the tape is prone to aging after heating. Therefore, it can be seen that the practicality of existing battery packaging waterproof structures is poor. Utility Model Content
[0004] In order to solve the deficiencies of the prior art, the present invention provides a battery pack and an electric device.
[0005] The technical effects to be achieved by the present invention are achieved through the following technical aspects:
[0006] In the first aspect, the utility model provides
[0007] A battery pack comprising: a battery module, an insulating layer, an adhesive sealing layer and a heat shrink film sleeve;
[0008] The insulating layer is insulatively covered on each end surface of the battery module, the heat shrink film sleeve is covered on the outer surface of the insulating layer, one side of the adhesive sealing layer is bonded to the outer surface of the insulating layer, and the other side is bonded to the inner surface of the end of the heat shrink film sleeve, so that the insulating layer and the heat shrink film sleeve are bonded through the adhesive sealing layer, and the material of the adhesive sealing layer is set to EPDM rubber.
[0009] In some embodiments, both ends of the heat shrinkable film sleeve are open, and the overlapping parts of the two ends of the heat shrinkable film sleeve and the opposite ends of the battery module are set as open parts, and the shape of each of the open parts is the same as the shape of one of the adhesive sealing layers.
[0010] In some embodiments, the heat shrink film sleeves are provided in two, one heat shrink film sleeve is provided as an inner film, and the other heat shrink film sleeve is provided as an outer film, the inner film is bonded to the insulating layer through the adhesive sealing layer, the outer film is covered on the inner film, and another adhesive sealing layer is provided between the open portion of the outer film and the inner film, so that the other adhesive sealing layer bonds the inner film and the outer film.
[0011] In some embodiments, the wrapping direction of the inner film and the wrapping direction of the outer film are staggered.
[0012] In some embodiments, the wrapping direction of the inner film and the wrapping direction of the outer film are perpendicular to each other.
[0013] In some embodiments, the thickness of the adhesive sealing layer is set to be less than or equal to 2 mm.
[0014] In some embodiments, the thickness of the adhesive sealing layer is 0.5 mm.
[0015] In some embodiments, the insulating layer is configured as an epoxy fiberglass board.
[0016] In some embodiments, the heat shrink film sleeve is made of polyvinyl chloride.
[0017] In a second aspect, the present invention provides an electric device comprising the battery pack described in any one of the above embodiments.
[0018] In summary, the present invention has at least the following advantages:
[0019] The battery pack provided by the present invention requires a heat-shrinkable film sleeve to be heated before it can shrink to achieve the purpose of encapsulating the battery. Therefore, an adhesive sealing layer is attached between the heat-shrinkable film sleeve and the insulating layer, so that the adhesive sealing layer can be heated while the heat-shrinkable film sleeve is heated. At this time, the adhesive sealing layer just achieves the bonding effect, thereby achieving an excellent waterproof effect. Among them, EPDM rubber has excellent oxidation resistance, UV resistance, acid and alkali resistance, so it can avoid reacting with other components, and has excellent low-temperature performance and sealing performance. Therefore, after pasting, the required waterproof level can be achieved; and only simple pasting is required, the operation is simple, and the labor cost is low; and because EPDM rubber has a low density and good elasticity, it is easy to process into various complex structural shapes to meet the bonding effect of different shapes, so that a good waterproof effect can be achieved with a small thickness, avoiding occupying a large structural space, and increasing the ornamental value. Moreover, when EPDM rubber is heated and bonded, it can not only avoid aging, but also achieve a better bonding effect. Therefore, the practicality of the waterproof structure of the present application is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1The overall structure schematic diagram of the battery pack of the embodiment of the present application is shown in the figure.
[0021] Figure 2 The exploded structure schematic diagram of the battery pack of the embodiment of the present application is shown in the figure.
[0022] Figure 3 The overall structure schematic diagram of the battery pack of the embodiment of the present application is shown in the figure.
[0023] Figure 4 The exploded structure schematic diagram of the battery pack of the embodiment of the present application is shown in the figure.
[0024] Figure 5 The exploded structure schematic diagram of the battery pack of the embodiment of the present application is shown in the figure.
[0025] Markings in the figure:
[0026] 10, battery pack; 100, insulation layer; 200, adhesive sealing layer; 300, heat shrink film sleeve; 310, open part. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.
[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.
[0029] In the following embodiments and drawings, the coordinate system of Figure 1 and Figure 5 is used, with the direction indicated by the arrow of the X axis being right, the direction indicated by the arrow of the Y axis being front, and the direction indicated by the arrow of the Z axis being up.
[0030] Embodiment 1:
[0031] As Figure 1 and Figure 2As shown, this embodiment provides a battery pack 10, including: a battery module, an insulating layer 100, an adhesive sealing layer 200 and a heat shrink film sleeve 300; the insulating layer 100 is insulated and coated on each end surface of the battery module, and the heat shrink film sleeve 300 is coated on the outer surface of the insulating layer 100, one side of the adhesive sealing layer 200 is bonded to the outer surface of the insulating layer 100, and the other side is bonded to the inner surface of the end of the heat shrink film sleeve 300, so that the insulating layer 100 and the heat shrink film sleeve 300 are bonded through the adhesive sealing layer 200, and the material of the adhesive sealing layer 200 is set to EPDM rubber.
[0032] Specifically, the number of insulating layers 100 corresponds to the number of end faces of the battery module. Each end face of the battery module is covered with an insulating layer 100, and adjacent insulating layers 100 are bonded together by adhesive tape to secure the insulating layer 100 to the battery module. The heat shrink film sleeve 300 is sleeved along the Y-axis direction on the surface of the battery module covered with the insulating layer 100, and the front and rear ends of the heat shrink film sleeve 300 after sleeved protrude from the front and rear ends of the battery module. An adhesive sealing layer 200 is adhered to the front and rear ends of the battery module. After heat shrinkage, the front and rear ends of the heat shrink film sleeve 300 are respectively coated on an adhesive sealing layer 200, that is, the two ends of the heat shrink film sleeve 300 are coated on the front and rear ends of the battery module. When the heat shrink film sleeve 300 is heat shrunk, it is heated and bonded to the adhesive sealing layer 200, thereby achieving a sealed and waterproof treatment. Among them, the adhesive sealing layer 200 can be selected from, but not limited to, EPDM rubber strips.
[0033] It's worth noting that the heat shrink film sleeve 300 requires heating to shrink and achieve its battery encapsulation purpose. Therefore, an adhesive sealing layer 200 is applied between the heat shrink film sleeve 300 and the insulating layer 100. This allows the heat shrink film sleeve 300 to heat the adhesive sealing layer 200 simultaneously, effectively achieving a bond and achieving excellent waterproofing. EPDM rubber exhibits excellent resistance to oxidation, UV rays, and acids and alkalis, thus preventing reactions with other components. It also exhibits excellent low-temperature performance and sealing properties, allowing the desired waterproofing rating to be achieved after application. Furthermore, simple application is required, resulting in simple operation and low labor costs. Furthermore, due to its low density and excellent elasticity, EPDM rubber can be easily processed into various complex shapes to achieve desired bonding requirements. This allows for excellent waterproofing with a relatively small thickness, avoiding the need for large structural spaces and enhancing aesthetic appeal. Furthermore, when heated, EPDM rubber is bonded, not only does it resist aging but also achieves superior bonding. Therefore, the waterproof structure of the present application has better practicality.
[0034] In another embodiment, the heat shrink film sleeve 300 may be closed at one end and open at the other end, and the other end of the heat shrink film sleeve 300 is bonded to the insulating layer 100 via the adhesive sealing layer 200 .
[0035] It is understandable that the shape and size of the heat shrink film sleeve 300 are subject to actual production requirements and are not limited here.
[0036] In order to facilitate the bonding of the heat shrink film sleeve 300 and the battery module, Figure 2 As shown, in some embodiments, both ends of the heat shrink film sleeve 300 are open, and the overlapping parts of the two ends of the heat shrink film sleeve 300 and the opposite ends of the battery module are set as open parts 310, and the shape of each open part 310 is the same as the shape of an adhesive sealing layer 200.
[0037] Specifically, the front and rear ends of the heat shrink film sleeve 300 are set as open parts 310, and the open parts 310 and the adhesive sealing layer 200 almost completely overlap during bonding, so that the adhesive sealing layer 200 of the corresponding shape can be affixed when the heat shrink film sleeve 300 is heat-sealed. In this way, while ensuring the best bonding effect between the heat shrink film sleeve 300 and the battery module, the production cost of the adhesive sealing layer 200 is saved.
[0038] Existing electronic silicone needs to be at least 3 mm thick after application to have a waterproof effect, and it occupies a large structural space. In order to make the structural space occupied by the adhesive sealing layer 200 smaller, in some embodiments, the thickness of the adhesive sealing layer 200 is set to be less than or equal to 2 mm.
[0039] Specifically, by controlling the thickness of the adhesive sealing layer 200 to less than 2 mm, the space occupied by the waterproof structure can be reduced. It should be understood that the thickness of the adhesive sealing layer 200 is determined based on actual production requirements and is not specifically limited herein. For example, the thickness of the adhesive sealing layer 200 can be set to 2 mm; in another example, the thickness of the adhesive sealing layer 200 can be set to 1 mm.
[0040] In order to make the adhesive sealing layer 200 occupy a smaller structural space, in some embodiments, the thickness of the adhesive sealing layer 200 is 0.5 mm.
[0041] Specifically, the thickness of the adhesive sealing layer 200 after heating is 0.5 mm, so that the structural space occupied by the adhesive sealing layer 200 can be further reduced while ensuring the adhesive strength.
[0042] To facilitate the use of the insulating layer 100 , in some embodiments, the insulating layer 100 is configured as an epoxy fiberglass board.
[0043] In this way, by setting the insulating layer 100 as an epoxy glass fiber board, the insulating effect is better.
[0044] To facilitate the use of the heat shrink film sleeve 300 , in some embodiments, the heat shrink film sleeve 300 is made of polyvinyl chloride.
[0045] Specifically, polyvinyl chloride has high transparency, high shrinkage and tear resistance. By setting the material of the heat shrink film sleeve 300 to polyvinyl chloride, the production cost is reduced and heat shrink molding is facilitated.
[0046] Preparation process: Prepare a molded EPDM rubber strip, stick the EPDM rubber strip to the surface of the epoxy glass fiber board of the battery module to be heat-shrunk, then cover it with a polyvinyl chloride film, and obtain the finished battery after heat shrinkage.
[0047] Example 2
[0048] like Figures 3 to 5 As shown, in this embodiment, two heat shrink film sleeves 300 are provided, one heat shrink film sleeve 300 is provided as an inner film, and the other heat shrink film sleeve 300 is provided as an outer film, the inner film is bonded to the insulating layer 100 through the adhesive sealing layer 200, the outer film is covered on the inner film, and another adhesive sealing layer 200 is provided between the open portion 310 of the outer film and the inner film, so that the other adhesive sealing layer 200 bonds the inner film and the outer film.
[0049] Specifically, the inner film and the outer film are bonded together by the adhesive sealing layer 200 , so that an additional waterproof layer is provided on the outside of the battery module, thereby achieving a better waterproof effect.
[0050] In order to enhance the waterproof effect, in some embodiments, the wrapping direction of the inner membrane and the wrapping direction of the outer membrane are staggered.
[0051] Specifically, by staggering the covering direction, the open part 310 of the outer film is staggered with the open part 310 of the inner film. The outer film can cover and seal the open part 310 of the inner film, and the open part 310 of the outer film is exposed to the outside of the covered inner film. In this way, waterproofing can be performed from different directions, and the waterproofing effect is better.
[0052] In order to facilitate the coating process, Figures 3 to 5 As shown, in some embodiments, the wrapping direction of the inner membrane and the wrapping direction of the outer membrane are arranged perpendicular to each other.
[0053] Specifically, the inner film is wrapped along the Y-axis, with its open portions 310 located at the front and rear ends of the battery module. The outer film is wrapped along the X-axis, with its open portions 310 located at the left and right ends of the battery module. By arranging the inner and outer film wrapping directions perpendicularly, this ensures waterproofing in different directions while facilitating the overlapping wrapping process of the outer and inner films, resulting in a more stable bond and improved aesthetics.
[0054] Preparation process: prepare a shaped ethylene-propylene-diene rubber strip, paste the ethylene-propylene-diene rubber strip on the surface of the epoxy glass plate of the battery module to be heat-shrunk, then cover the polyvinyl chloride film, which is the inner film, heat-shrink the inner film to obtain a semi-finished battery, then prepare another shaped ethylene-propylene-diene rubber strip, paste the ethylene-propylene-diene rubber strip on the semi-finished battery with the blown inner film, cover the polyvinyl chloride film, which is the outer film, and heat-shrink, and the finished battery is obtained after the heat-shrinking is completed.
[0055] Example 3
[0056] The embodiment provides an electric device comprising the battery pack 10 of the embodiment 1 or the embodiment 2.
[0057] Specifically, the electric device can be but is not limited to an electric vehicle, the waterproof process of the battery pack 10 is simple in structure, easy to operate, extremely low in labor cost, small in space size occupied by the waterproof structure, remarkable in waterproof effect, not prone to aging, and suitable for use in various harsh environments.
[0058] In the utility model, unless there is definite stipulation and limitation, the terms "mount", "connect", "fix", and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be direct connection, or can be indirect connection through intermediate medium, can be the communication inside two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.
[0059] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, or is the orientation or position relationship when the utility model product is usually placed, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, structure and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.
[0060] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0061] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0062] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.
Claims
1. A battery pack, characterized in that: include: A battery module, an insulating layer (100), an adhesive sealing layer (200), and a heat shrink film sleeve (300); The insulating layer (100) is insulatedly coated on each end surface of the battery module, the heat shrink film sleeve (300) is coated on the outer surface of the insulating layer (100), one side of the adhesive sealing layer (200) is bonded to the outer surface of the insulating layer (100), and the other side is bonded to the inner surface of the end of the heat shrink film sleeve (300), so that the insulating layer (100) and the heat shrink film sleeve (300) are bonded through the adhesive sealing layer (200), and the material of the adhesive sealing layer (200) is set to EPDM rubber.
2. The battery pack according to claim 1, wherein: Both ends of the heat shrinkable film sleeve (300) are open, and the overlapping parts of the two ends of the heat shrinkable film sleeve (300) and the opposite ends of the battery module are set as open parts (310), and the shape of each open part (310) is the same as the shape of one of the adhesive sealing layers (200).
3. The battery pack according to claim 2, wherein: The heat shrink film sleeves (300) are provided in two forms, one heat shrink film sleeve (300) is provided as an inner film, and the other heat shrink film sleeve (300) is provided as an outer film, the inner film is bonded to the insulating layer (100) through the bonding sealing layer (200), the outer film is covered on the inner film, and another bonding sealing layer (200) is provided between the open portion (310) of the outer film and the inner film, so that the other bonding sealing layer (200) bonds the inner film and the outer film.
4. The battery pack according to claim 3, wherein: The wrapping direction of the inner membrane and the wrapping direction of the outer membrane are staggered with each other.
5. The battery pack according to claim 4, characterized in that: The wrapping direction of the inner membrane and the wrapping direction of the outer membrane are arranged perpendicular to each other.
6. The battery pack according to any one of claims 1 to 5, characterized in that: The thickness of the adhesive sealing layer (200) is set to be less than or equal to 2 mm.
7. The battery pack according to claim 6, characterized in that: The thickness of the adhesive sealing layer (200) is 0.5 mm.
8. The battery pack according to any one of claims 1 to 5, characterized in that: The insulating layer (100) is configured as an epoxy glass fiber board.
9. The battery pack according to any one of claims 1 to 5, characterized in that: The heat shrink film sleeve (300) is made of polyvinyl chloride.
10. An electric device, characterized in that: A battery pack (10) comprising the battery pack according to any one of claims 1 to 9.