Wire harness passing waterproof structure of battery pack

Abstract

The utility model discloses a wire harness wire passing waterproof structure of a battery pack, which comprises a waterproof wire passing sleeve comprising a wire throwing end, a connecting end and a wire passing channel, and the connecting end is arranged in a mounting channel. The mounting through holes comprise a first mounting hole and a second mounting hole, and the radiuses of the first mounting hole and the second mounting hole are sequentially reduced in the second direction, so that a first step part is formed between the first mounting hole and the second mounting hole. The connecting end comprises an abutting part and an extending part, and the abutting part extends in the third direction and abuts against the first step part. The extending part extends in the third direction and is arranged at the bottom of the abutting part. The sealing ring extends along the second direction and sleeves the extension portion, the sealing ring is in interference fit with the second mounting hole, a gland locking sealing waterproof mode is replaced, the interference fit mode can provide a more stable waterproof effect, meanwhile, the design of the waterproof wire passing sleeve is simplified, the mounting process is simpler and faster, and the waterproof wire passing sleeve is more convenient to use. And the operation complexity is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to wire sheath technical field, concretely relates to a wire harness wire -passing waterproof structure of battery pack. BACKGROUND

[0002] In prior art, the conventional energy storage battery pack needs to make waterproof between the wire material that extends out and the inner end of the shell through the gland head connecting the battery pack shell when flinging the wire from the shell outward, the commonly used gland head has two kinds of plastic and metal, the waterproof stability of the plastic gland head is poor, the price of the metal gland head is expensive, and the two kinds of gland heads need to use spanner to lock when the production line staff operates, cannot define its operation standard clearly, more leads to insufficient waterproof stability, and the gland head not locking or locking too tightly will lead to waterproof failure, and the production line assembly efficiency of the product using the gland head waterproof is low. UTILITY MODEL CONTENTS

[0003] In order to overcome the above-mentioned shortcomings, the utility model aims at providing a wire harness wire-passing waterproof structure of battery pack to solve the problems caused in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the technical scheme of a wire harness wire-passing waterproof structure of battery pack, the battery pack includes a shell, the top end of the shell is provided with a mounting channel along one end of a first direction, and the wire harness wire-passing waterproof structure of the battery pack includes:

[0005] A waterproof wire-passing sleeve includes a wire flinging end, a connecting end and a wire-passing channel, the wire flinging end and the connecting end are sequentially arranged along a second direction, and the connecting end is arranged in the mounting channel. The wire-passing channel is continuously arranged in the wire flinging end and the connecting end and is used for placing the wire harness.

[0006] The mounting through hole includes a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are sequentially arranged in the second direction with a radius reduction, so as to form a first step portion between the first mounting hole and the second mounting hole.

[0007] The connecting end includes an abutting portion and an extension portion, the abutting portion extends along a third direction and is arranged in abutment with the first step portion. The extension portion extends along the third direction and is arranged at the bottom of the abutting portion.

[0008] A sealing ring extends along the second direction and is sleeved on the extension portion and is used for interference fit with the second mounting hole, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] The utility model provides a kind of wiring harness waterproof structure of battery pack, by using sealing ring and second mounting hole interference fit, instead of graham head locking sealing waterproof mode, and interference fit mode can provide more stable waterproof effect, while the structure simplifies the design of waterproof wire sleeve, so that installation process is more simple and fast, reduces the operation complexity.

[0010] In some embodiments, the mounting hole further includes a third mounting hole disposed at the bottom of the second mounting hole. The first mounting hole, the second mounting hole and the third mounting hole are coaxially arranged and sequentially arranged with decreasing radius along the second direction to form a second step portion between the second mounting hole and the third mounting hole.

[0011] In some embodiments, the bottom of the sealing ring is in abutment with the second step portion, the outer side of the sealing ring is inclined away from the extension portion, and the hole wall of the second mounting hole is correspondingly inclined with the outer side of the sealing ring. The outer side of the sealing ring is provided with a plurality of annular protrusions spaced apart along the second direction for interference fit with the hole wall of the second mounting hole.

[0012] With the above technical solution, the hole wall of the second mounting hole is correspondingly inclined with the outer side of the sealing ring, which can improve the fit tightness between the mounting hole and the sealing ring and further enhance the waterproof performance. The annular protrusions can provide more secure sealing and reduce the possibility of water penetration.

[0013] In some embodiments, the abutment portion includes a fixing hole disposed on both sides of the wire flinging end along the third direction. The first step portion is provided with a threaded hole correspondingly arranged with the fixing hole for fixing the abutment portion to the first step portion by mounting screws.

[0014] With the above technical solution, the threaded hole correspondingly arranged with the fixing hole is provided on the first step portion, and the abutment portion is fixed to the first step portion by mounting screws to provide more stable fixing effect and reduce the relative shaking between the connecting members, thereby reducing the risk of wear and damage of the waterproof wire sleeve.

[0015] In some embodiments, the top of the sealing ring is provided with a sealing flange disposed between the abutment portion and the first step portion for interference fit between the sealing flange and the hole wall of the first mounting hole after the mounting screw is screwed in.

[0016] By adopting the above technical solution, the sealing flange can prevent direct mechanical contact between the contact part and the first step part, thus avoiding wear and affecting the sealing effect. In addition, the design of the sealing flange can increase the contact area of ​​the sealing ring, enabling it to fully fit with the first step part and the hole wall of the first mounting hole, improving the tightness between it and the connecting parts, thereby enhancing the sealing effect and improving the waterproof performance of the waterproof cable sleeve.

[0017] In some embodiments, a clearance is provided between the sealing flange and the wall of the first mounting hole to provide interference space for the sealing flange.

[0018] By adopting the above technical solution, the reserved gap provides interference space for the sealing flange, which helps the sealing flange to fit the hole wall of the first mounting hole after the mounting screw is screwed in and fixed, thereby improving the sealing performance and effectively improving the waterproof performance of the waterproof cable sleeve.

[0019] In some embodiments, the sealing ring, the annular protrusion, and the sealing flange are all made of rubber.

[0020] By adopting the above technical solution, the rubber material has good elasticity and plasticity, which can maintain stable sealing performance in harsh working environments, resist the erosion of chemical media and the wear of mechanical friction, extend the overall service life of the sealing ring, and effectively prevent leakage.

[0021] In some embodiments, the wire-spinning end, the connecting end, and the wire-passing channel body are integrally injection molded from EPDM material.

[0022] Using the above technical solution, EPDM (ethylene propylene diene monomer rubber) has the characteristics of high and low temperature resistance and good weather resistance. It has a higher elongation at break and can maintain its elastic properties for a longer time. It also has the advantages of crack resistance, oil resistance and air tightness. At the same time, the EPDM injection molding process is simple. By placing the wire harness at the position of the wire passage during injection molding, the wire end and the connecting end can be integrally injection molded, thereby improving the airtightness and waterproof effect of the wire harness and the waterproof wire passage sleeve. Attached Figure Description

[0023] Figure 1 This is a three-dimensional representation of an embodiment of a waterproof wiring harness structure for a battery pack according to the present invention. Figure 1 ;

[0024] Figure 2 This is a three-dimensional representation of an embodiment of a waterproof wiring harness structure for a battery pack according to the present invention. Figure 2 The wire harness waterproofing structure has been installed in the installation channel.

[0025] Figure 3This is a partial structural diagram of an embodiment of a waterproof wiring harness structure for a battery pack according to the present invention.

[0026] Figure 4 This is a schematic diagram of the installation channel of an embodiment of the waterproof wiring harness structure for a battery pack according to the present invention.

[0027] In the picture:

[0028] 1. Waterproof cable guide sleeve; 10. Cable drop end; 11. Connecting end; 12. Abutment part; 13. Extension part; 14. Fixing hole; 2. Sealing ring; 20. Annular protrusion; 21. Sealing flange; 22. Mounting screw; 23. Reservation gap; 3. Housing; 30. Installation channel; 31. First mounting hole; 32. Second mounting hole; 33. Third mounting hole; 34. First step part; 35. Second step part; 36. Threaded hole; 4. Wire harness. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] refer to Figures 1 to 4 , Figure 1 This invention illustrates a three-dimensional view of a waterproof wiring harness 4 structure for a battery pack according to an embodiment of the present invention. Figure 1 ; Figure 2 This invention illustrates a three-dimensional view of a waterproof wiring harness 4 structure for a battery pack according to an embodiment of the present invention. Figure 2 Among them, the waterproof structure of wire harness 4 has been installed in the installation channel 30; Figure 3 This diagram shows a partial structural schematic of a waterproof wiring harness 4 for a battery pack according to an embodiment of the present invention. Figure 4 This diagram illustrates the structure of the installation channel 30 of the wiring harness 4 waterproof structure of a battery pack according to an embodiment of the present invention.

[0035] The technical solution adopted by this utility model is a waterproof wiring harness 4 structure for a battery pack. The battery pack includes a shell 3, and the top of the shell 3 is along a first direction ( Figure 2 One end of the battery pack (shown in the X direction) is provided with an installation channel 30. The wiring harness 4 of the battery pack has a waterproof wiring sleeve 1 and a sealing ring 2. The waterproof wiring sleeve 1 includes a wire-spinning end 10, a connecting end 11, and a wiring channel. The wire-spinning end 10 and the connecting end 11 are along the second direction (shown in the X direction). Figure 2(As shown in the Z-direction) are arranged sequentially, with the connecting end 11 located within the mounting channel 30. A wire-passing channel is continuously provided within the wire-dropping end 10 and the connecting end 11 for placing the wire harness 4. The mounting through-hole includes a first mounting hole 31 and a second mounting hole 32, which are arranged with progressively smaller radii along the second direction to form a first step 34 between the first mounting hole 31 and the second mounting hole 32.

[0036] The connecting end 11 includes an abutting portion 12 and an extension portion 13. The abutting portion 12 extends along a third direction and abuts against the first stepped portion 34. The extension portion 13 extends along a third direction (…). Figure 2 The sealing ring 2 extends along the second direction and is fitted onto the extension 13 for interference fit with the second mounting hole 32. The first direction, the second direction, and the third direction are perpendicular to each other.

[0037] This application provides a waterproof wiring harness 4 structure for a battery pack. By using an interference fit between a sealing ring 2 and a second mounting hole 32, the sealing and waterproofing method is replaced by a grommet locking method. The interference fit method can provide a more stable waterproof effect. At the same time, this structure simplifies the design of the waterproof wiring sleeve 1, making the installation process simpler and faster, and reducing the complexity of operation.

[0038] In some embodiments, reference Figures 1 to 4 The mounting through hole also includes a third mounting hole 33, which is located at the bottom of the second mounting hole 32. The first mounting hole 31, the second mounting hole 32, and the third mounting hole 33 are coaxially arranged and their radii decrease sequentially along the second direction to form a second step portion 35 between the second mounting hole 32 and the third mounting hole 33.

[0039] In some embodiments, reference Figures 1 to 4 The bottom of the sealing ring 2 abuts against the second step portion 35, and the outer side of the sealing ring 2 is inclined away from the extension portion 13. The wall of the second mounting hole 32 is inclined accordingly to the outer side of the sealing ring 2. The outer side of the sealing ring 2 is provided with a plurality of annular protrusions 20, which are spaced apart along the second direction for interference fit with the wall of the second mounting hole 32.

[0040] For example, the wall of the second mounting hole 32 is inclined to the outer side of the sealing ring 2. This inclined design can improve the tightness of the fit between the mounting hole and the sealing ring 2, further enhancing the waterproof performance. The annular protrusion 20 can provide a more secure seal and reduce the possibility of water penetration.

[0041] In some embodiments, reference Figures 1 to 4The abutment portion 12 includes a fixing hole 14, which is located on both sides of the casting end 10 along a third direction. The first step portion 34 is provided with a threaded hole 36 corresponding to the fixing hole 14, for fixing the abutment portion 12 to the first step portion 34 by means of a mounting screw 22.

[0042] For example, by providing a threaded hole 36 corresponding to the fixing hole 14 in the first step portion 34, the abutment portion 12 is fixed to the first step portion 34 using the mounting screw 22 to provide a more stable fixing effect, reduce the relative shaking between the connectors, and thereby reduce the risk of wear and damage to the waterproof cable sleeve 1.

[0043] In some embodiments, reference Figures 1 to 4 The top of the sealing ring 2 is provided with a sealing flange 21, which is located between the abutment portion 12 and the first step portion 34. When the mounting screw 22 is screwed in and fixed, the sealing flange 21 is press-fitted with the hole wall of the first mounting hole 31.

[0044] For example, by providing a sealing flange 21, direct mechanical contact between the abutment portion 12 and the first step portion 34 can be avoided to prevent wear and affect the sealing effect. In addition, the design of the sealing flange 21 can increase the contact area of ​​the sealing ring 2, enabling it to fully fit with the wall of the first step portion 34 and the first mounting hole 31, improving the tightness between it and the connecting parts, thereby enhancing the sealing effect and improving the waterproof performance of the waterproof cable sleeve 1.

[0045] In some embodiments, reference Figures 1 to 4 A clearance 23 is provided between the sealing flange 21 and the wall of the first mounting hole 31 to provide interference space for the sealing flange 21.

[0046] For example, the retention gap 23 provides interference space for the sealing flange 21, which helps the sealing flange 21 to have an interference fit with the hole wall of the first mounting hole 31 after the mounting screw 22 is screwed in and fixed, thereby improving the sealing performance and effectively improving the waterproof performance of the waterproof cable sleeve 1.

[0047] In some embodiments, the sealing ring 2, the annular protrusion 20, and the sealing flange 21 are all made of rubber.

[0048] For example, rubber materials have good elasticity and plasticity, which can maintain stable sealing performance in harsh working environments, resist the erosion of chemical media and the wear of mechanical friction, extend the overall service life of the sealing ring 2, and effectively prevent leakage.

[0049] In some embodiments, the wire-spinning end 10, the connecting end 11, and the wire-passing channel body are integrally molded using EPDM material.

[0050] For example, EPDM has characteristics such as resistance to high and low temperatures and good weather resistance. It has a higher elongation at break, can maintain its elastic properties for a longer time, and has advantages such as crack resistance, oil resistance and air tightness. At the same time, the EPDM injection molding process is simple. By placing the wire harness 4 at the position of the wire passage during injection molding, the wire-spinning end 10 and the connecting end 11 can be integrally injection molded, thereby improving the airtightness and waterproof effect of the wire harness 4 and the waterproof wire passage sleeve 1.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A waterproof wiring harness structure for a battery pack, the battery pack comprising a housing, wherein one end of the top of the housing along a first direction is provided with an installation channel, characterized in that... The aforementioned waterproof wiring harness structure of the battery pack includes: A waterproof cable guide sleeve includes a cable-spinning end, a connecting end, and a cable-passing channel. The cable-spinning end and the connecting end are arranged sequentially along a second direction, and the connecting end is located within the installation channel. The cable-passing channel is continuously arranged within the cable-spinning end and the connecting end for placing the cable bundle. The mounting channel includes a first mounting hole and a second mounting hole, wherein the first mounting hole and the second mounting hole are arranged with decreasing radius along the second direction to form a first step between the first mounting hole and the second mounting hole; The connecting end includes an abutting portion and an extending portion. The abutting portion extends in a third direction and abuts against the first stepped portion. The extending portion extends in the third direction and is located at the bottom of the abutting portion. A sealing ring extends along the second direction and is fitted onto the extension for an interference fit with the second mounting hole. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The waterproof wiring harness structure for the battery pack according to claim 1, characterized in that, The mounting channel further includes a third mounting hole, which is located at the bottom of the second mounting hole; the first mounting hole, the second mounting hole and the third mounting hole are coaxially arranged and are arranged with decreasing radius along the second direction to form a second step between the second mounting hole and the third mounting hole.

3. The waterproof wiring harness structure for the battery pack according to claim 2, characterized in that, The bottom of the sealing ring abuts against the second stepped portion, and the outer side of the sealing ring is inclined away from the extension portion. The wall of the second mounting hole is inclined in accordance with the outer side of the sealing ring. The outer side of the sealing ring is provided with a plurality of annular protrusions, which are spaced apart along the second direction for interference fit with the wall of the second mounting hole.

4. The waterproof wiring harness structure for the battery pack according to claim 3, characterized in that, The abutment portion includes a fixing hole, which is located on both sides of the casting end along the third direction; the first step portion is provided with a threaded hole corresponding to the fixing hole, for fixing the abutment portion to the first step portion by installing screws.

5. The waterproof wiring harness structure for the battery pack according to claim 4, characterized in that, The top of the sealing ring is provided with a sealing flange, which is located between the abutment portion and the first step portion, so that when the mounting screw is screwed in and fixed, the sealing flange is in an interference fit with the wall of the first mounting hole.

6. The waterproof wiring harness structure for the battery pack according to claim 5, characterized in that, A clearance is provided between the sealing flange and the wall of the first mounting hole to provide interference space for the sealing flange.

7. The waterproof wiring harness structure for the battery pack according to claim 5, characterized in that, The sealing ring, the annular protrusion, and the sealing flange are all made of rubber.

8. The waterproof wiring harness structure for the battery pack according to claim 1, characterized in that, The wire-spinning end, the connecting end, and the wire-passing channel are integrally injection molded from EPDM material.

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