Power battery connector component and assembling method

Abstract

The invention discloses a power battery connector component and an assembling method, the power battery connector component is used for being connected to the end part of a coaxial cable, the power battery connector component comprises a connector main body, a plug, a shielding ring assembly, an end cover and a cable sealing element, and the connector main body is internally provided with a cavity; the middle section of the plug along the axial direction is provided with a step part, one end of the plug is clamped with the cavity, and the other end of the plug is pressed on a stripping end wire core of the cable in a sleeving manner; the shielding ring assembly is inserted into the cavity, is arranged at a fixed distance from the step part, and is used for being pressed at the stripping end of the cable in a sleeving manner; the end cover is clamped at one end, close to the plug, of the connector main body; and the cable sealing element is inserted between the end part of the cavity and the inner side of the end cover. According to the power battery connector component provided by the invention, through the connector component consisting of the connector main body, the plug, the shielding ring assembly, the end cover and the cable sealing element, the power battery connector component can be adapted to the radius of an oil-to-electricity cable, and can maintain enough safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of cable connectors, and in particular to a power battery connector component and an assembling method thereof. Background Art

[0002] The diesel locomotive oil-to-electricity project transforms the original diesel locomotive into a pure electric new energy locomotive. The power battery pack is connected to the load device through the high-voltage box, using a high-voltage 767V DC platform. There are very strict requirements for cable flame retardancy, corrosion, high temperature, and interference. The cable from the high-voltage box to the load device needs to be connected to the high-voltage box using a connector. For example, Chinese patent 201510449596.8 discloses a cable connector for a coaxial cable. The cable includes an outer conductor, an inner conductor, and an insulating medium between the outer and inner conductors. The connector includes a connector front body and a connector rear body inserted into the connector front body. The connector has requirements for the outer diameter of the cable. If the protection level is too small or too large, it cannot meet the requirements.

[0003] The above-mentioned prior art still has the following problems: currently most connector structures cannot meet the cable outer diameter and cable pressure resistance requirements, resulting in the oil-to-electricity cable connection being difficult to match the current required safety level. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a power battery connector component and assembly method to solve the technical problem that most of the current connector structures in the prior art cannot meet the cable outer diameter and cable pressure resistance requirements, resulting in the oil-to-electricity cable connection being difficult to match the current required safety level.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a power battery connector component for connecting to an end of a coaxial cable, comprising: A connector body having a cavity therein; A plug, wherein a step portion is provided in the middle section along the axial direction, one end of the plug is engaged with the cavity, and the other end is used for sleeve pressing on the stripped end wire core of the cable; A shielding ring assembly is inserted into the cavity and arranged at a fixed distance from the step portion, and is used for being pressed onto the stripped end of the cable; an end cap, which is snap-fitted to an end of the connector body close to the plug; and A cable sealing member is inserted between the end of the cavity and the inner side of the end cover and is used for sealing the end.

[0006] In some embodiments, the shielding ring assembly includes a shield, an inner shielding ring and an outer shielding ring. The shield is sleeved on the stripped end of the cable and turned outward onto the inner shielding ring. The outer shielding ring is sleeved on the outside of the shield and the inner shielding ring.

[0007] In some embodiments, a contact end is provided at one end of the plug that is clamped with the cavity, and the shape of the contact end is a hollow cylinder. The other end of the plug is provided with a crimping portion, and the shape of the crimping portion is an arc, with outer edges extending on both sides, and the outer edges are used for inward bending crimping and wrapping around the stripped end core of the cable.

[0008] In some embodiments, a plurality of latching protrusions are provided on the outer circumference of the contact end, and an annular latching groove is provided in the cavity corresponding to the latching protrusions, and the plurality of latching protrusions are all latched in the latching groove.

[0009] In some embodiments, a plurality of protrusions are provided on the outer circumference of the connector body close to one end of the plug, and through openings are opened on the end cover corresponding to the protrusions one by one, and the protrusions are snap-fitted with the through openings.

[0010] In some embodiments, the end cover is further provided with a plurality of guide grooves, and guide strips are provided on the outer side of the connector body close to one end of the plug corresponding to the guide grooves, and the guide strips are plugged into the guide grooves.

[0011] In some embodiments, a positioning member is further included, wherein the positioning member is disposed on the cable and is used to limit the distance between the shielding ring assembly and the step portion of the plug.

[0012] In some embodiments, the positioning member includes a ferrule, a connecting rod and a ring, which are connected end to end in sequence, and the ferrule is clamped on the contact end and abuts against the step portion, the ring is sleeved on the stripping end of the cable, and the shielding ring assembly abuts against the ring.

[0013] In a second aspect, the present invention further provides a method for assembling a power battery connector component, which is used to assemble the power battery connector component described in any one of the above, comprising the following steps: S1. Strip the cable jacket and slide the end cap, cable seal, outer shielding ring and inner shielding ring onto the cable in sequence. S2, crimp the contact end of the plug to the wire core of the stripped end of the cable; S3. Straighten the shield on the cable and raise it evenly to the periphery; S4, flip the turned-up shielding material onto the inner shielding ring, then slide the outer shielding ring onto the inner shielding ring, and then crimp and fix it on the cable; S5, insert the plug into the inner side of the connector body and lock it; S6. Insert the cable seal into the inside of the connector body and snap the locking end cap onto the rear end of the connector body. In some embodiments, S2 also includes that the length of the shield is cut to 11±0.5 mm; S4 also includes that the distance between the step portion of the shielding ring and the plug is 35.5±0.5 mm.

[0014] Compared with the prior art, the power battery connector component provided by the present invention, which is composed of a connector body, a plug, a shielding ring assembly, an end cover and a cable seal, can be adapted to the cable radius of oil-to-electricity conversion and maintain sufficient safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of a power battery connector component provided by an embodiment of the present invention; Figure 2 is a three-dimensional exploded view of a power battery connector component provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the first assembly step of the power battery connector component provided by an embodiment of the present invention; Figure 4 is a schematic diagram of the third assembly step of the power battery connector component provided by an embodiment of the present invention; Figure 5 , Figure 6 and Figure 7 1 is a schematic diagram of multiple actions of step 4 of assembling a power battery connector component provided by an embodiment of the present invention; Figure 8 It is a schematic diagram of installing a positioning piece of a power battery connector component provided by an embodiment of the present invention.

[0016] Description of reference numerals: 1. Connector body; 101. Cavity; 102. Protrusion; 103. Guide strip; 2. Plug; 21. Contact end; 2101. Card convex; 22. Step portion; 23. Crimping portion; 2301. Outer edge; 3. Shielding ring assembly; 31. Shielding; 32. Inner shielding ring; 33. Outer shielding ring; 4. End cover; 401. Through port; 402. Guide groove; 5. Cable seals; 6. Positioning piece; 61. Clamping sleeve; 62. Connecting rod; 63. Ring. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] In order to solve the technical problem that most of the current connector structures cannot meet the cable outer diameter and cable pressure resistance requirements, resulting in the oil-to-electricity cable connection being difficult to match the current safety level requirements, the present invention provides a power battery connector component that can meet the cable outer diameter and cable pressure resistance requirements and match the current safety level requirements in the oil-to-electricity cable connection.

[0019] It should be noted that the power battery connector component described in the present invention is used for but not limited to power batteries, etc. For the convenience of explanation, in the present invention, only the application of the power battery connector component to the power battery is taken as an example for explanation, and the principles of applying the power battery connector component to other types of equipment are essentially the same as those applied to the power battery, which will not be repeated here.

[0020] See also Figure 1 and Figure 2 , Figure 2 A three-dimensional exploded diagram of a power battery connector component provided in an embodiment of the present invention, the power battery connector component includes a connector body 1, a plug 2, a shielding ring assembly 3, an end cover 4 and a cable seal 5. The inner side of the connector body 1 has a cavity 101, and the cavity 101 passes through to the right end of the connector body 1 to form an insertion port connected to the plug 2; the plug 2 is provided with a step portion 22 in the middle section along the axial direction, one end of the plug 2 is engaged with the cavity 101, and the other end is used to be pressed on the stripped end wire core of the cable; the shielding ring assembly 3 is inserted in the cavity 101 and is arranged at a fixed interval with the step portion 22, and is used to be pressed on the stripped end of the cable, the position of the connector shell and the shielding ring, the shielding ring contacts the shell, and controls the safety distance from the contact; the end cover 4 is engaged with one end of the connector body 1 close to the plug 2, and the internal shielding ring assembly 3 is locked in the cavity 101; the cable seal 5 is inserted between the end of the cavity 101 and the inner side of the end cover 4, and is used for sealing after the end cover 4 is engaged with the end of the connector body 1.

[0021] In one embodiment, see Figure 7 The shielding ring assembly 3 includes a shield 31, an inner shielding ring 32 and an outer shielding ring 33. The shield 31 is sleeved on the stripped end of the cable and turned outward to the inner shielding ring 32. The outer shielding ring 33 is sleeved on the outer side of the shield 31 and the inner shielding ring 32 to form a quadruple shielding consisting of a first shielding layer 31, an inner shielding ring 32, a second shielding layer 31 and an outer shielding ring 33, thereby achieving a better shielding effect.

[0022] In one embodiment, see Figure 2 , a contact end is provided at one end of the plug 2 that is engaged with the cavity 101. When one end of the contact end 21 is inserted into the cavity 101, it can be engaged with the cavity 101, so as to be positioned and installed in the cavity 101. A crimping portion 23 is provided at the other end of the plug 2. The crimping portion 23 is used to be pressed onto the stripped end core of the cable to form conduction between the connector body 1 and the cable core, wherein the step portion 22 is provided at the connection between the crimping portion 23 and the contact end 21, and is a step end surface of the contact end 21. The contact end 21 is in the shape of a hollow cylinder, and the crimping portion 23 is in the shape of an arc, with outer edges 2301 extending on both sides. The outer edges 2301 are used to be crimped inwardly and wrapped around the stripped end core of the cable.

[0023] Furthermore, in order to facilitate the quick docking and locking of the contact end 21 and the connector body 1, a plurality of latching protrusions 2101 are provided on the outer circumference of the contact end 21. The latching protrusions 2101 are obliquely extending sheets with a certain elasticity. In addition, an annular latching groove is provided in the cavity 101 corresponding to the latching protrusions 2101, and a plurality of the latching protrusions 2101 are engaged with the latching groove. During the insertion process, the latching protrusion 2101 is pressed down. When the latching protrusion 2101 moves into the annular latching groove, it rebounds and is stuck on the right side wall of the annular latching groove, forming a barrier facing the right side of the cavity 101, thereby achieving the purpose of quick docking and locking.

[0024] In one embodiment, see Figure 1 and Figure 2 In order to facilitate the connection between the end cover 4 and the connector body 1, a plurality of protrusions 102 are provided on the outer circumference of the connector body 1 near one end of the plug 2, and through openings 401 are opened on the end cover 4 corresponding to the protrusions 102 one by one, and the protrusions 102 are engaged with the through openings 401. By pushing the end cover 4 to the right end of the connector body 1, the protrusions 102 and the through openings 401 are engaged to form a locking, and the operation is convenient and quick.

[0025] Furthermore, in order to provide guidance when the end cover 4 is mounted on the connector body 1, a plurality of guide grooves 402 are provided on the end cover 4, and guide strips 103 are provided on the outer side of the connector body 1 close to one end of the plug 2, corresponding to the guide grooves 402. The guide strips 103 are plugged into the guide grooves 402, and the plugging of the guide strips 103 into the guide grooves 402 forms guidance when the end cover 4 is mounted on the connector body 1.

[0026] In one embodiment, see Figure 8In order to quickly limit the distance between the shielding ring assembly 3 and the plug 2 and avoid excessive errors, a positioning member 6 is also included. The positioning member 6 is arranged on the cable to limit the distance between the shielding ring assembly 3 and the step portion 22 of the plug 2. The distance between the shielding ring and the step portion 22 of the plug 2 is 35.5±0.5mm. This range is the position of the connector housing and the shielding ring. If it is larger than this, the shielding ring cannot contact the housing, and if it is smaller than this, it is too close to the contact position and is unsafe.

[0027] Furthermore, the positioning member 6 includes a sleeve 61, a connecting rod 62 and a ring 63, and the sleeve 61, the connecting rod 62 and the ring 63 are connected end to end in sequence, and the sleeve 61 is clamped on the contact end 21 and abuts against the step portion 22. The inner side of the sleeve 61 is provided with elastic hooks on both sides, which extend into the inner side of the contact end 21 to form a clamping connection and fit on the top of the arc portion of the crimping portion 23, and also abut against the step portion 22. The ring 63 is sleeved on the stripping end of the cable, and the shielding ring assembly 3 abuts against the ring 63, so that the overall length of the positioning member 6 is used to limit the spacing between the shielding ring assembly 3 and the step portion 22, which is convenient for controlling the spacing during assembly, improving assembly efficiency, and reducing possible spacing deviation errors.

[0028] In a second aspect, the present invention further provides a method for assembling a power battery connector component, which is used to assemble a power battery connector component as described in any one of the above embodiments, comprising the following steps: S1. Strip the sheath of the cable and slide the end cap 4, cable seal 5, outer shielding ring 33 and inner shielding ring 32 onto the cable in sequence; S2, crimping the contact end 21 of the plug 2 with the wire core of the stripped end of the cable; S3, straighten the shield 31 on the cable and raise it evenly to the periphery; S4, flip the turned-up shielding material 31 onto the inner shielding ring 32, then slide the outer shielding ring 33 onto the inner shielding ring 32, and then crimp and fix it on the cable; S5, inserting the plug 2 into the inner side of the connector body 1 and locking it; S6. Insert the cable seal 5 into the inner side of the connector body 1, and clamp and lock the end cover 4 to the rear end of the connector body 1; Furthermore, S2 also includes that the length of the shielding 31 is cut to 11±0.5 mm; S4 also includes that the distance between the shielding ring and the step portion 22 of the plug 2 is 35.5±0.5 mm.

[0029] Furthermore, the cable is fixed about 100 mm from the end of the end cap 4, and the cable bending radius should not be less than 5 times the cable diameter.

[0030] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A power battery connector component, used to connect to the end of a coaxial cable, characterized in that: include: A connector body having a cavity therein; A plug, wherein a step portion is provided in the middle section along the axial direction, one end of the plug is engaged with the cavity, and the other end is used for sleeve pressing on the stripped end wire core of the cable; A shielding ring assembly is inserted into the cavity and arranged at a fixed distance from the step portion, and is used for being pressed onto the stripped end of the cable; An end cap, which is snap-fitted to an end of the connector body close to the plug; as well as A cable sealing member is inserted between the end of the cavity and the inner side of the end cover and is used for sealing the end.

2. The power battery connector component according to claim 1, characterized in that: The shielding ring assembly comprises a shield, an inner shielding ring and an outer shielding ring. The shield is sleeved on the stripping end of the cable and turned outward onto the inner shielding ring. The outer shielding ring is sleeved on the outer side of the shield and the inner shielding ring.

3. The power battery connector component according to claim 1, characterized in that: A contact end is provided at one end of the plug that is engaged with the cavity, and the shape of the contact end is a hollow cylinder. A crimping portion is provided at the other end of the plug, and the shape of the crimping portion is an arc, with outer edges extending on both sides. The outer edges are used for inward bending crimping and wrapping around the stripped end wire core of the cable.

4. The power battery connector component according to claim 3, characterized in that: A plurality of locking protrusions are arranged on the outer circumference of the contact end, and an annular locking groove is opened in the cavity corresponding to the locking protrusions, and the plurality of locking protrusions are all locked with the locking groove.

5. The power battery connector component according to claim 1, characterized in that: The outer circumference of the connector body close to one end of the plug is provided with a plurality of protrusions, and the end cover is provided with through openings corresponding to the protrusions one by one, and the protrusions are clamped with the through openings.

6. The power battery connector component according to claim 5, characterized in that: The end cover is also provided with a plurality of guide grooves, and the outer side of the connector body close to one end of the plug is provided with guide strips corresponding to the guide grooves one by one, and the guide strips are plugged into the guide grooves.

7. The power battery connector component according to claim 1, characterized in that: It also includes a positioning piece, which is arranged on the cable and is used to limit the distance between the shielding ring assembly and the step portion of the plug.

8. The power battery connector component according to claim 7, characterized in that: The positioning member includes a ferrule, a connecting rod and a ring, which are connected end to end in sequence, and the ferrule is clamped on the contact end and abuts against the step portion, the ring is sleeved on the stripping end of the cable, and the shielding ring assembly abuts against the ring.

9. A method for assembling a power battery connector component, characterized in that: Used to assemble the power battery connector component according to any one of claims 1 to 8, comprising the following steps: S1. Strip the cable jacket and slide the end cap, cable seal, outer shielding ring and inner shielding ring onto the cable in sequence. S2, crimp the contact end of the plug to the wire core of the stripped end of the cable; S3. Straighten the shield on the cable and raise it evenly to the periphery; S4, flip the turned-up shielding material onto the inner shielding ring, then slide the outer shielding ring onto the inner shielding ring, and then crimp and fix it on the cable; S5, insert the plug into the inner side of the connector body and lock it; S6. Insert the cable seal into the inside of the connector body and snap the locking end cap onto the rear end of the connector body.

10. The method for assembling a power battery connector component according to claim 9, characterized in that: S2 also includes that the length of the shield is cut to 11±0.5mm; S4 also includes that The distance between the shielding ring and the step portion of the plug is 35.5±0.5mm.

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