CN220692759U - Sealing structure of high-voltage junction box of power battery - Google Patents
Sealing structure of high-voltage junction box of power battery Download PDFInfo
- Publication number
- CN220692759U CN220692759U CN202322102262.6U CN202322102262U CN220692759U CN 220692759 U CN220692759 U CN 220692759U CN 202322102262 U CN202322102262 U CN 202322102262U CN 220692759 U CN220692759 U CN 220692759U
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- Prior art keywords
- connecting section
- junction box
- wire harness
- connector
- joint
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- 238000007789 sealing Methods 0.000 title claims abstract description 81
- 239000010410 layer Substances 0.000 claims abstract description 9
- 239000004831 Hot glue Substances 0.000 claims abstract description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 3
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Connection Or Junction Boxes (AREA)
Abstract
The utility model discloses a sealing structure of a high-voltage junction box of a power battery, which comprises an electric junction box, a second joint and a heat-shrinkable sleeve, wherein a first joint is arranged on one side of the electric junction box, the electric junction box is used for internally connecting a wire harness, and the second joint is sleeved on the periphery of the wire harness and then is detachably and hermetically connected with the first joint; the inner wall of the heat-shrinkable sleeve is provided with a hot melt adhesive layer, and the heat-shrinkable sleeve is used for shrinking when being simultaneously coated on the peripheries of the wire harness, the first connector and the second connector, so that the first connector and the second connector are sealed when the electric junction box is connected with the wire harness in an inscription mode. The sealing structure of the high-voltage junction box of the power battery can further seal the connecting structure of the electric junction box after the wiring harness is connected, and improves the sealing effect of the electric junction box.
Description
Technical Field
The utility model relates to the technical field of electric sealing, in particular to a sealing structure of a high-voltage junction box of a power battery.
Background
The junction box structure used by the power battery is used as an anode and cathode output connector, a high-voltage wire harness is generally connected with a high-voltage locking gram head, and in order to ensure the sealing effect of waterproofing and the like, the sealing structure such as a waterproof rubber ring is generally sleeved on the junction of the flange head and the gram head thread, so that the sealing detection result of the junction box is improved.
When the high-voltage wire harness in the current market passes through the flange head of the junction box and the sealing ring and is inserted into the junction box for high-voltage connection, the flange head is rotated to be screwed into the gram head of the junction box and extrudes the sealing ring to deform, and the sealing ring deforms to extrude the high-voltage wire harness to realize sealing. But because battery package is limited in arranging space on whole car, the condition of buckling can appear in the pencil of terminal box outside, can have stress to the sealed position of gram head and flange head after the pencil is buckled, influences the sealed effect of terminal box to make outside moisture probably get into in the terminal box and lead to producing insulating bad risk.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide the sealing structure of the high-voltage junction box of the power battery, which can further seal the connecting structure of the electric junction box after the wiring harness is connected, so that the sealing effect of the electric junction box is improved.
The utility model adopts the following technical scheme:
the utility model provides a power battery high pressure terminal box seal structure, includes electric terminal box, second joint and pyrocondensation sleeve pipe, and one side of electric terminal box is equipped with first joint, and electric terminal box is used for inscribing the pencil, and second joint cover is located behind the pencil periphery and can dismantle sealing connection with first joint; the inner wall of the heat-shrinkable sleeve is provided with a hot melt adhesive layer, and the heat-shrinkable sleeve is used for shrinking when being simultaneously coated on the peripheries of the wire harness, the first connector and the second connector, so that the first connector and the second connector are sealed when the wire harness is connected in the electric junction box.
Further, the sealing structure of the high-voltage junction box of the power battery further comprises a sealing ring, wherein the sealing ring is sleeved on the periphery of the wire harness and penetrates through the second connector, so that the second connector is in sealing fit with the first connector when being connected.
Further, the first joint comprises a first connecting section and a second connecting section, one end of the first connecting section is arranged on one side of the electric junction box, the other end of the first connecting section is provided with the second connecting section, the second connecting section is provided with a first thread, the second joint is provided with a second thread, and the first thread is in threaded connection with the second thread.
Further, the second joint comprises a third connecting section and a fourth connecting section; the second thread is arranged on the third connecting section, and the fourth connecting section is arranged at one end, far away from the first connecting section, of the third connecting section after the second thread is in threaded connection with the first thread; the internal diameter of the third connecting section is larger than that of the fourth connecting section, the sealing ring is sleeved on the periphery of the wire harness and penetrates through the third connecting section, and the internal diameter of the fourth connecting section is larger than the external diameter of the wire harness.
Further, the inner wall of the third connecting section is also provided with a cylindrical surface section, the cylindrical surface section is arranged at one end of the inner wall of the third connecting section, which is close to the fourth connecting section, and the cylindrical surface section is used for being abutted with the periphery of the sealing ring after the sealing ring penetrates through the third connecting section.
Further, the periphery of the fourth connecting section is provided with at least two stress planes, and the two stress planes are used for guiding the second thread to be in threaded connection with the first thread after clamping force.
Further, the electrical junction box includes a box body provided with an installation cavity and an opening, and a box cover detachably closing the opening, and one end of the wire harness is installed in the installation cavity.
Further, the inner diameter of the seal ring is smaller than the outer diameter of the wire harness.
Further, the heat shrink is made of a cross-linked polyethylene material.
Compared with the prior art, the utility model has the beneficial effects that:
the sealing connection of the first joint and the second joint of the embodiment forms a first reseal, and the hot melt adhesive layer coated at the connection part of the first joint and the second joint and the connection part of the second joint and the wire harness forms a second reseal. Thus, even if the first resealing fails, the second resealing can prevent moisture in the air from entering the electrical junction box from the failure position of the first resealing, and the double sealing can well ensure the waterproof tightness of the electrical junction box.
Drawings
FIG. 1 is a schematic view of a sealing structure of a high voltage junction box of a power battery according to the present utility model;
FIG. 2 is an exploded view of the sealing structure of the high voltage junction box of the power battery of the present utility model;
fig. 3 is a schematic diagram showing a semi-sectional structure of a sealing structure of a high-voltage junction box of a power battery.
In the figure:
1. a case body; 10. a box cover; 11. a first connection section; 12. a second connection section; 121. a first thread;
21. a third connecting section; 211. a second thread; 212. a cylindrical section; 22. a fourth connecting section;
3. a heat-shrinkable sleeve;
4. a wire harness;
5. and (3) sealing rings.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the structures or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1-3, the utility model discloses a sealing structure of a high-voltage junction box of a power battery, which comprises an electric junction box, a second connector and a heat shrinkage sleeve 3, wherein the electric junction box comprises a box body 1 and a box cover 10, the box body 1 is provided with an installation cavity and an opening, and the box cover 10 can cover the opening. One side of the electric junction box is provided with a first connector, the electric junction box is used for inscribing the wire harness 4, and the second connector is sleeved on the periphery of the wire harness 4 and is detachably and hermetically connected with the first connector. Specifically, the inner wall of the heat shrinkage bush 3 is provided with a hot melt adhesive layer, and the heat shrinkage bush 3 is coated on the periphery of the wire harness 4, the first connector and the second connector.
As shown in fig. 2, on the basis of the above structure, when assembling, the second connector is sleeved on the periphery of the wire harness 4, then the heat-shrinkable sleeve 3 is sleeved on the periphery of the second connector and the wire harness 4 at the same time, then one end of the wire harness 4 passes through the first connector and then stretches into the mounting cavity of the box body 1 and is inscribed with the electric junction box, in this embodiment, a screw can be adopted to stretch into the mounting cavity from the opening and connect one end of the wire harness 4 with the bottom end of the electric junction box by screw, then the box cover 10 is covered with the opening, then the first connector and the second connector are detachably connected in a sealing manner, finally the heat-shrinkable sleeve 3 is moved to the positions corresponding to the periphery of the wire harness 4, the first connector and the second connector at the same time, and the heat-shrinkable sleeve 3 and the heat-shrinkable layer are heated, so that the heat-shrinkable sleeve 3 is coated at the junction of the first connector and the second connector and the wire harness and the junction box, and the heat-shrinkable layer 3 is not only melted, but also is tightly connected with the first connector, the second connector and the heat-shrinkable sleeve 3 and the wire harness 4 are tightly connected with the first connector and the second connector 4.
The sealing connection between the first joint and the second joint in this embodiment forms a first reseal, and the hot melt adhesive layer coated at the connection between the first joint and the second joint and the connection between the second joint and the wire harness 4 forms a second reseal. Therefore, after the sealing structure of the high-voltage junction box of the power battery is arranged on a battery pack, the wire harness 4 extending out of the first joint of the electric junction box is limited by the space of the battery pack and possibly bends, the bent wire harness 4 applies stress to the first joint and the second joint and possibly damages the sealing connection between the first joint and the second joint and between the second joint and the wire harness 4, and at the moment, the connection part of the first joint and the second joint and the connection part of the second joint and the wire harness 4 are simultaneously covered by the heat-shrinkable sleeve 3 and the hot melt adhesive layer, so that even if the first resealing fails, the second resealing can prevent moisture in air from entering the electric junction box from the first resealing failure part, and the waterproof sealing performance of the electric junction box can be well ensured.
The heat-shrinkable sleeve 3 of this embodiment may be made of a polyolefin material such as crosslinked polyethylene.
As shown in fig. 3, further, the sealing connection between the first connector and the second connector in this embodiment may be achieved by the sealing ring 5 in the prior art, and the sealing ring 5 is sleeved on the periphery of the wire harness 4 and penetrates through the first connector, so when the second connector is connected with the first connector, the second connector moves towards the first connector, and meanwhile, the sealing ring 5 is pressed towards the first connector until the second connector is connected with the first connector, in this embodiment, the sealing manner of the sealing ring 5 is adopted, the elastic deformation characteristic of the sealing ring 5 is utilized, when the gas in the electrical junction box is affected by thermal expansion and cold contraction, the sealing ring 5 can be deformed to fill the connection gap between the second connector and the first connector, and the sealing structure is simple, and the sealing effect is good. Of course, in other embodiments, an elastic gasket or the like may be used instead of the seal ring 5, and the sealant may be filled in the connection gap between the first joint and the second joint.
Further, the detachable connection mode of the first connector and the second connector can adopt a threaded connection structure, specifically, the first connector comprises a first connection section 11 and a second connection section 12, one end of the first connection section 11 is arranged on one side of the electric junction box, the other end of the first connection section is provided with the second connection section 12, the periphery of the second connection section 12 is provided with a first thread 121, the inner wall of the second connector is correspondingly provided with a second thread 211, and the second thread 211 is in threaded connection with the first thread 121 so that the second connector can be detachably connected with the first connector. It can be appreciated that the first connecting section 11 is a smooth surface, so that the heat-shrinkable sleeve 3 is tightly attached to the first connecting section 11 after heat shrinkage, and the protruding thread structure of the first thread 121 is prevented from affecting the joint of the heat-shrinkable sleeve 3 coated with the first joint and the second joint, thereby increasing the risk that moisture in air enters the electrical junction box. The embodiment adopts the threaded connection mode, so that the structure is simple, the connection is reliable, the path of moisture entering the electric junction box can be prolonged through the threaded structure, and the sealing effect between the first connector and the second connector can be further enhanced.
In other embodiments, the first connector and the second connector may be connected by plugging, clamping, or by a peripheral nut.
Further, the second joint includes a third connecting section 21 and a fourth connecting section 22, and then the second thread 211 is disposed on an inner wall of the third connecting section 21, the fourth connecting section 22 is disposed at one end of the third connecting section 21 far away from the first connecting section 11 after the first thread 121 is connected with the second thread 211, and the inner diameter of the third connecting section 21 is larger than that of the fourth connecting section 22, the sealing ring 5 is sleeved on the periphery of the wire harness 4 and penetrates through the third connecting section 21, and the inner diameter of the fourth connecting section 22 is larger than the outer diameter of the wire harness 4.
On the basis of the above structure, after the sealing ring 5 is inserted into the third connecting section 21, since the inner diameter of the third connecting section 21 is larger than the inner diameter of the fourth connecting section 22, when the second thread 211 is connected with the first thread 121, the sealing ring 5 can be pressed against the fourth connecting section 22 in the screw fit, so that the sealing ring 5 is extruded to deform to fill and seal the connection gap between the first joint and the second joint, and the sealing effect is more reliable. In addition, the temperature rises in the use process of the electric junction box, when the gas in the installation cavity of the electric junction box expands, the second connector extrudes the sealing ring 5 towards the fourth connecting section 22, and at the moment, the inner diameter of the fourth connecting section 22 is larger than the outer diameter of the wire harness 4, namely, the inner wall of the fourth connecting section 22 can slide relatively with the periphery of the wire harness 4, so that the extrusion degree of the sealing ring 5 is relieved, and the elastic failure of the sealing ring 5 is prevented.
Further, the inner wall of the third connecting section 21 is further provided with a cylindrical section 212, the cylindrical section 212 is arranged at one end, close to the fourth connecting section 22, of the inner wall of the third connecting section 21, so that after the second thread 211 is in threaded connection with the first thread 121, the sealing ring 5 is extruded to abut against the fourth connecting section 22, if the inner wall of the third connecting section 21 is the first thread 121 at this time, the outer ring of the sealing ring 5 cannot be completely contacted with the inner wall of the third connecting section 21, the risk that moisture enters the electric junction box from the joint of the first joint and the second joint is increased, and the cylindrical section 212 of the embodiment is of a smooth cylindrical structure, so that the cylindrical section 212 can abut against the sealing ring 5 tightly, and the higher the degree of lamination of the extruded sealing ring 5 and the cylindrical section 212 is, namely, the larger the contact area is, so that the sealing effect is improved.
Further, in order to facilitate the threaded connection between the second thread 211 and the first thread 121, at least two stress planes are provided on the outer periphery of the fourth connecting section 22, so that when the second joint is connected to the first joint, tools such as a wrench can be used to clamp the two stress planes, the central axis of the fourth connecting section 22 is used as the rotation center, the wrench can be rotated to screw the second thread 211 into the first thread 121, compared with a smooth cylindrical surface structure, tools such as a wrench can clamp the fourth connecting section 22 more easily, and relative sliding with the outer periphery of the fourth connecting section 22 is prevented, so that threaded connection between the second joint and the first joint is smoothly realized.
It should be noted that the stress plane may be two parallel planes, or two planes disposed at an included angle, or a plurality of stress planes may be disposed, which may be designed reasonably according to practical situations.
Further, the inner diameter of the sealing ring 5 of the present embodiment is smaller than the outer diameter of the wire harness 4, so, after the sealing ring 5 is sleeved on the wire harness 4, the inner wall of the sealing ring 5 is radially expanded by the extrusion of the outer diameter of the wire harness 4, and after the sealing ring is penetrated on the inner wall of the third connecting section 21, the inner wall of the third connecting section 21 and the outer periphery of the wire harness 4 are simultaneously extruded on the sealing ring 5, the sealing ring 5 is prevented from being sleeved on the outer periphery of the wire harness 4, and as the inner diameter of the fourth connecting section 22 is larger than the outer diameter of the wire harness 4, substances which are unfavorable for the insulation performance of the electrical junction box, enter the electrical junction box from the gap between the fourth connecting section 22 and the wire harness 4 through the gap between the inner ring 5 and the wire harness 4, and the connection tightness between the fourth connecting section 22 and the wire harness 4 is further improved.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (9)
1. The power battery high-voltage junction box sealing structure is characterized by comprising an electric junction box, a second joint and a heat shrinkage sleeve (3), wherein a first joint is arranged on one side of the electric junction box, the electric junction box is used for internally connecting a wire harness (4), and the second joint is sleeved on the periphery of the wire harness (4) and then is detachably and hermetically connected with the first joint; the inner wall of the heat shrinkage sleeve (3) is provided with a hot melt adhesive layer, and the heat shrinkage sleeve (3) is used for performing heat shrinkage when simultaneously cladding the periphery of the wire harness (4), the first connector and the second connector, so that the first connector and the second connector are sealed when the electric junction box is connected with the wire harness (4).
2. The power battery high-voltage junction box sealing structure according to claim 1, further comprising a sealing ring (5), wherein the sealing ring (5) is sleeved on the periphery of the wire harness (4) and penetrates through the second connector, so that the second connector is in sealing fit with the first connector when connected.
3. The power battery high-voltage junction box sealing structure according to claim 2, wherein the first joint comprises a first connecting section (11) and a second connecting section (12), one end of the first connecting section (11) is arranged on one side of the electric junction box, the other end of the first connecting section (11) is provided with the second connecting section (12), the second connecting section (12) is provided with a first thread (121), the second joint is provided with a second thread (211), and the first thread (121) is in threaded connection with the second thread (211).
4. A power cell high voltage junction box sealing structure according to claim 3, characterized in that the second joint comprises a third connecting section (21) and a fourth connecting section (22); the second thread (211) is arranged on the third connecting section (21), and the fourth connecting section (22) is arranged at one end, far away from the first connecting section (11), of the third connecting section (21) after the second thread (211) is in threaded connection with the first thread (121); the inner diameter of the third connecting section (21) is larger than that of the fourth connecting section (22), the sealing ring (5) is sleeved on the periphery of the wire harness (4) and penetrates through the third connecting section (21), and the inner diameter of the fourth connecting section (22) is larger than that of the wire harness (4).
5. The power battery high-voltage junction box sealing structure according to claim 4, wherein a cylindrical surface section (212) is further arranged on the inner wall of the third connecting section (21), the cylindrical surface section (212) is arranged on one end, close to the fourth connecting section (22), of the inner wall of the third connecting section (21), and the cylindrical surface section (212) is used for being abutted to the periphery of the sealing ring (5) after the sealing ring (5) penetrates through the third connecting section (21).
6. The power cell high voltage junction box sealing structure according to claim 5, characterized in that the periphery of the fourth connecting section (22) is provided with at least two stress planes for guiding the second screw thread (211) to be screw-connected with the first screw thread (121) after clamping force.
7. The high-voltage junction box sealing structure for a power battery according to any one of claims 1 to 6, wherein the electrical junction box comprises a box body (1) and a box cover (10), the box body (1) is provided with a mounting cavity and an opening, the box cover (10) detachably covers the opening, and one end of the wire harness (4) is mounted in the mounting cavity.
8. The power cell high-voltage junction box sealing structure according to claim 2, wherein an inner diameter of the seal ring (5) is smaller than an outer diameter of the wire harness (4).
9. The power cell high voltage junction box sealing structure according to claim 7, wherein the heat shrinkage bush (3) is made of a crosslinked polyethylene material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322102262.6U CN220692759U (en) | 2023-08-04 | 2023-08-04 | Sealing structure of high-voltage junction box of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322102262.6U CN220692759U (en) | 2023-08-04 | 2023-08-04 | Sealing structure of high-voltage junction box of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220692759U true CN220692759U (en) | 2024-03-29 |
Family
ID=90407241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322102262.6U Active CN220692759U (en) | 2023-08-04 | 2023-08-04 | Sealing structure of high-voltage junction box of power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220692759U (en) |
-
2023
- 2023-08-04 CN CN202322102262.6U patent/CN220692759U/en active Active
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