CN216250959U

CN216250959U - Whole waterproof mechanism of group battery

Info

Publication number: CN216250959U
Application number: CN202122509068.0U
Authority: CN
Inventors: 顾权
Original assignee: Wuxi Shengda Vehicle Industry Technology Co ltd
Current assignee: Wuxi Shengda Vehicle Industry Technology Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-08
Anticipated expiration: 2031-10-19

Abstract

The utility model relates to an electric vehicle assembly, in particular to an integral waterproof mechanism of a battery pack. The battery pack charging device comprises an integrated plug, a charging plug and a circuit board for displaying the state of the battery pack. The shell is characterized by further comprising a shell, wherein a first opening is formed in the shell, and a first end cover is arranged on the first opening. There is first annular bounding wall around first end cover medial surface, and first annular bounding wall inserts in first opening, and has sealed bush between first annular bounding wall and the first open-ended inboard wall. There is the fixed orifices all around of first end cover, and the fixed orifices of first end cover all corresponds with the casing outside, has the bolt seat on the casing outer wall that the fixed orifices of first end cover corresponds, has the screw hole on the bolt seat, all has fastening screw between the fixed orifices of first end cover and the screw hole that corresponds. The battery pack adopting the waterproof mechanism has a good waterproof effect, the whole battery pack cannot be scraped by water, and safety problems such as short circuit, fire and the like caused by water inflow cannot occur.

Description

Whole waterproof mechanism of group battery

Technical Field

The utility model relates to an electric vehicle assembly, in particular to a battery pack integral waterproof mechanism for waterproof protection of a battery pack of an electric vehicle.

Background

At present, two waterproof modes of the battery pack in the electric vehicle industry exist, one mode is that a plane type sealing ring is added between parts of a lithium battery pack and a screw locking mode is used for achieving the waterproof purpose. However, the method has the problems of irregular part ports, misplacement of the sealing rings and loose screws, so that the sealing effect of the battery pack is not ideal, and the hidden danger of water inlet exists. Meanwhile, if the locking force of the screw is too large, the sealing ring is damaged by excessive extrusion deformation, and the waterproof effect is affected. In addition, the sealing ring is exposed, the aging speed is high, and the waterproof effect is also influenced. The second way is to spread sealing glue at the opening of the battery pack. However, the method of applying the sealing glue has the problems of uncontrollable fluidity and operation difference of workers due to the glue dosage, so that the battery pack has low sealing performance and poor waterproof effect. The battery pack has low sealing and poor water resistance, which can cause water inlet rejection of the whole battery pack and even cause safety problems such as short circuit, fire and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an integral waterproof mechanism of a battery pack, the waterproof effect of the battery pack adopting the waterproof mechanism is better, the whole battery pack cannot be scrapped due to water inflow, and the safety problems of battery short circuit, fire and the like caused by water inflow cannot occur.

In order to solve the problems, the following technical scheme is provided:

the integral waterproof mechanism of the battery pack comprises an integrated plug, a charging plug and a circuit board for displaying the state of the battery pack. The integrated plug, the charging plug and the circuit board are all connected with the first end cover in a fixed sealing manner. There is first annular bounding wall around the first end cover medial surface, and first annular bounding wall inserts in first opening, and has sealed bush between first annular bounding wall and the first open-ended inboard wall for be sealed form cooperation between first end cover and the first opening. There is the fixed orifices around the first end cover, and the fixed orifices of first end cover all corresponds with the casing outside, has the bolt seat on the casing outer wall that the fixed orifices of first end cover corresponds, has the screw hole on the bolt seat, all has fastening screw between the fixed orifices of first end cover and the screw hole that corresponds.

And annular convex ribs are arranged around the outer side wall of the sealing bush.

The front of first end cover has first pit, has the hole of stepping down with integrated form plug shape looks adaptation between the bottom of the hole of first pit and the back of first end cover, and the back of integrated form plug passes first pit and inserts in the hole of stepping down, and the positive flange of integrated form plug offsets with first pit, and the back of integrated form plug is located the hole of stepping down.

The integrated plug is characterized in that a connecting hole is formed in a flange on the front face of the integrated plug, a blind hole is formed in the bottom of a pit corresponding to the connecting hole, an inner bolt is machined in the side wall of the blind hole, and a connecting screw is arranged between the connecting hole and the blind hole.

The front end of the charging plug is provided with a gasket, the gasket comprises a support ring made of flexible materials, the support ring is sleeved on the charging plug, a front cover made of flexible materials is arranged in front of the support ring and covers the front face of the charging plug, and the front cover is connected with the support ring through a flexible connecting part. The first end cover is provided with a second through hole, an external thread is processed on the outer side wall of the charging plug, the outer diameter of the gasket is larger than the aperture of the second through hole, the rear end of the charging plug penetrates through the second through hole from the front side of the first end cover to stretch into the inner side of the first end cover, and a locking nut is arranged on the section of the charging plug which is positioned on the inner side of the first end cover.

The front of first end cover has the second pit, the circuit board is the flexible circuit piece, and the flexible circuit piece is integrated on a sticker, and the sticker pastes in the second pit, has the through wires hole between the pit bottom of second pit and the first end cover back, and the through wires hole divide into first section body and second section body from being close to second pit one end to the other end, and the internal diameter of the first section body is less than the width of the second section body to form the step in the junction of the two.

The casing is rectangular form, and the one end of casing is uncovered form, and this uncovered form is first opening, the fixed orifices has four, and they are located four angles departments of end cover respectively.

Keep away from first open-ended casing one end and also be uncovered form, this uncovered be the second opening, have the second end cover on the second opening, have second annular bounding wall around the second end cover medial surface, and second annular bounding wall inserts in the second opening, and also has sealed bush between second annular bounding wall and the second open-ended medial wall. Also there are four fixed orificess on the second end cover, are the one-to-one between the fixed orifices of second end cover and the fixed orifices of first end cover and describe and arrange, the bolt seat is rectangular form, and it is an organic whole with the casing along the vertical of casing and is connected, and the both ends of bolt seat align with the both ends of casing respectively, the screw hole is the through-hole, and the fixed orifices of second end cover also all has fastening screw with the screw hole that corresponds within a definite time.

By adopting the scheme, the method has the following advantages:

the shell of the integral waterproof mechanism of the battery pack is provided with a first opening, the first opening is provided with a first end cover, the integrated plug, the charging plug and the circuit board are connected with the first end cover in a fixed sealing mode, the periphery of the inner side surface of the first end cover is provided with a first annular enclosing plate, the first annular enclosing plate is inserted into the first opening, a sealing bush is arranged between the first annular enclosing plate and the inner side wall of the first opening, the periphery of the first end cover is provided with a fixing hole, the outer wall of the shell corresponding to the fixing hole of the first end cover is provided with a bolt seat, the bolt seat is provided with a threaded hole, and a fastening screw is arranged between the fixing hole of the first end cover and the corresponding threaded hole. When the battery pack is used, the first end cover is opened, the battery pack is placed into the shell through the first opening, and the battery pack is electrically connected with the integrated plug, the charging plug and the circuit board; then, sleeving the sealing bush on the first annular enclosing plate; then, the first annular enclosing plate faces the first opening, and the first annular enclosing plate is pressed into the first opening, so that the sealing bush is tightly pressed between the outer side wall of the first annular enclosing plate and the inner side wall of the first opening to form sealing; and finally, sequentially loading and locking all the fastening screws. The whole waterproofing mechanism of this kind of group battery utilizes the casing to carry on waterproofly, does not have the problem of part butt joint, and the seal bush overlaps on first annular bounding wall, can not appear the dislocation problem, and the seal bush forms sealed effect through the extrusion between first annular bounding wall and the inner wall of first through-hole, and the extrusion force is radial force, and fastening screw's fastening force is the axial, and the direction of effort is different, even if fastening screw is not hard up, also can not influence sealed effect. Simultaneously, fastening screw is used for fixed first end cover, and fastening force and sealing bush extrusion force are different in direction, because, fastening screw's fastening force can not cause the damage to sealing bush, and then can not influence sealed effect. In addition, the sealing bush is positioned between the annular enclosing plate and the first through hole, and is not exposed outside, so that the aging is slow, and the sealing effect is always good. Moreover, the shell is waterproof, and does not need to be coated with sealing glue, so that the problem that the sealing performance of the battery pack is low due to the fact that the glue dosage, the flowability is not controllable, the operation difference of workers is avoided. Therefore, the whole waterproof mechanism of the battery pack has good sealing effect, and water cannot enter the battery pack in the mechanism, so that the safety problems of battery short circuit, fire and the like caused by water inflow cannot occur.

Drawings

Fig. 1 is a schematic structural view of an overall waterproofing mechanism of a battery pack according to the present invention;

fig. 2 is an exploded schematic view of the entire waterproofing mechanism of the battery pack of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic view of a connection body of a first end cap and a sealing bush in the battery pack integral waterproof mechanism of the utility model;

fig. 5 is a schematic view of the structure of the battery pack.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the whole waterproof mechanism of the battery pack of the present invention includes a housing 2, an integrated plug 13, a charging plug 19, and a circuit board 11 for displaying the state of the battery pack. There is first opening 7 on the casing 2, has first end cover 1 on the first opening 7, integrated form plug 13, charging plug 19 and circuit board 11 all are fixed sealed form and link to each other with first end cover 1. There is first annular bounding wall 23 around the first end cover 1 medial surface, and first annular bounding wall 23 inserts in first opening 7, and has sealing bush 5 between the inboard wall of first annular bounding wall 23 and first opening 7 for be sealed form cooperation between first end cover 1 and first opening 7. There are fixed orifices 24 around first end cover 1, and fixed orifices 24 of first end cover 1 all correspond with the casing 2 outside, have bolt seat 3 on the casing 2 outer wall that fixed orifices 24 of first end cover 1 correspond, threaded hole on the bolt seat 3, all have fastening screw 10 between fixed orifices 24 of first end cover 1 and the threaded hole that corresponds. The front of first end cover 1 has first pit 16, has the hole 17 of stepping down with integrated form plug 13 shape looks adaptation between the pit bottom of first pit 16 and the back of first end cover 1, and the back of integrated form plug 13 passes first pit 16 and inserts in the hole 17 of stepping down, and the positive flange of integrated form plug 13 offsets with first pit 16, and the back of integrated form plug 13 is located the hole 17 of stepping down. The flange on the front face of the integrated plug 13 is provided with a connecting hole 14, the bottom of a pit corresponding to the connecting hole 14 is provided with a blind hole 15, the side wall of the blind hole 15 is provided with an internal bolt, and a connecting screw 12 is arranged between the connecting hole 14 and the blind hole 15. The front end of the charging plug 19 is provided with a gasket 20, the gasket 20 comprises a support ring 20-3 made of flexible material, the support ring 20-3 is sleeved on the charging plug 19, a front cover 20-1 made of flexible material is arranged in front of the support ring 20-3, the front cover 20-1 covers the front face of the charging plug 19, and the front cover 20-1 is connected with the support ring 20-3 through a flexible connecting part 20-2. The first end cover 1 is provided with a second through hole 22, the outer side wall of the charging plug 19 is provided with an external thread, the outer diameter of the gasket 20 is larger than the aperture of the second through hole 22, the rear end of the charging plug 19 penetrates through the second through hole 22 from the front surface of the first end cover 1 and extends into the inner side of the first end cover 1, and the section of the charging plug 19 located on the inner side of the first end cover 1 is provided with a locking nut 21, so that the gasket 20 is pressed on the front surface of the first end cover 1, and sealing is formed. There is second pit 8 in the front of first end cover 1, circuit board 11 is the flexible circuit piece, and the flexible circuit piece is integrated on a sticker, and the sticker pastes in second pit 8, has through wires hole 9 between the bottom of the pit of second pit 8 and the 1 back of first end cover, and through wires hole 9 divide into first section body and second section body from being close to second pit 8 one end to the other end, and the internal diameter of the first section body is less than the width of the second section body to form the step in the junction of the two.

The casing 2 is long, one end of the casing 2 is open, the open is the first opening 7, and there are four fixing holes 24, which are respectively located at four corners of the end cover.

The one end of casing 2 of keeping away from first opening 7 also is uncovered form, and this uncovered is the second opening, has second end cover 4 on the second opening, has second annular bounding wall 18 around the second end cover 4 medial surface, and second annular bounding wall 18 inserts in the second opening, and also has sealing bush 5 between second annular bounding wall 18 and the second open-ended inboard wall. Also there are four fixed orificess 24 on the second end cover 4, are the one-to-one between the fixed orificess 24 of second end cover 4 and the fixed orifices 24 of first end cover 1 and describe and arrange, bolt seat 3 is rectangular form, and it is vertically along casing 2 and is a body coupling with casing 2, and the both ends of bolt seat 3 align with the both ends of casing 2 respectively, the screw hole is the through-hole, also all has fastening screw 10 between the fixed orifices 24 of second end cover 4 and the screw hole that corresponds.

The support ring 20-3, the front cover 20-1 and the flexible connecting part 20-2 are all made of rubber.

In order to ensure the sealing effect, the periphery of the outer side wall of the sealing bush 5 is provided with an annular convex rib 6.

In order to save material, the bolt seat 3 is allowed to have a notch towards the outer side of the box.

When in use, the integrated plug 13, the charging plug 19 and the circuit board 11 are connected with the first end cover 1. Because the back of integrated form plug 13 is located and steps in the hole 17 of stepping down, there is the step between the first section body and the second section body to form the groove that holds the sealed glue of mobility and soak and irritate between integrated form plug 13 back and the hole 17 of stepping down, between the first section body and the second section body, irritate the sealed glue of mobility in these two grooves, can improve sealed effect greatly. When the battery pack is installed, the first end cover 1 is opened, and the battery pack is placed into the shell 2 through the first opening 7, so that the battery pack is electrically connected with the integrated plug 13, the charging plug 19 and the circuit board 11. The sealing bush 5 is then fitted over the first annular shroud 23. Then, the first annular enclosing plate 23 faces the first opening 7, and the first annular enclosing plate 23 is pressed into the first opening 7, so that the sealing bush 5 is pressed between the outer side wall of the first annular enclosing plate 23 and the inner side wall of the first opening 7 to form a seal. Finally, all the fastening screws 10 are sequentially installed and locked.

Claims

1. The integral waterproof mechanism of the battery pack comprises an integrated plug (13), a charging plug (19) and a circuit board (11) for displaying the state of the battery pack; the charging plug is characterized by further comprising a shell (2), wherein a first opening (7) is formed in the shell (2), a first end cover (1) is arranged on the first opening (7), and the integrated plug (13), the charging plug (19) and the circuit board (11) are connected with the first end cover (1) in a fixed and sealed manner; a first annular enclosing plate (23) is arranged on the periphery of the inner side face of the first end cover (1), the first annular enclosing plate (23) is inserted into the first opening (7), and a sealing bush (5) is arranged between the first annular enclosing plate (23) and the inner side wall of the first opening (7), so that the first end cover (1) is in sealing fit with the first opening (7); there are fixed orifices (24) around first end cover (1), and fixed orifices (24) of first end cover (1) all correspond with casing (2) outside, have bolt seat (3) on casing (2) outer wall that fixed orifices (24) of first end cover (1) correspond, threaded hole on bolt seat (3), all there are fastening screw (10) between fixed orifices (24) of first end cover (1) and the threaded hole that corresponds.

2. The battery pack integral waterproof mechanism according to claim 1, wherein the periphery of the outer side wall of the seal bush (5) is provided with an annular rib (6).

3. The integral waterproof mechanism of the battery pack according to claim 1, wherein the front surface of the first end cap (1) is provided with a first recess (16), a relief hole (17) which is matched with the shape of the integrated plug (13) is formed between the bottom of the first recess (16) and the back surface of the first end cap (1), the back surface of the integrated plug (13) passes through the first recess (16) and is inserted into the relief hole (17), the flange on the front surface of the integrated plug (13) is abutted against the bottom of the first recess (16), and the back surface of the integrated plug (13) is positioned in the relief hole (17).

4. The battery pack integral waterproof mechanism according to claim 2, wherein the flange on the front face of the integrated plug (13) is provided with a connecting hole (14), the bottom of the pit corresponding to the connecting hole (14) is provided with a blind hole (15), the side wall of the blind hole (15) is provided with an internal bolt, and a connecting screw (12) is arranged between the connecting hole (14) and the blind hole (15).

5. The battery pack integral waterproof mechanism according to claim 1, wherein the charging plug (19) has a gasket (20) at the front end thereof, the gasket (20) includes a support ring (20-3) made of a flexible material, the support ring (20-3) is fitted over the charging plug (19), a front cover (20-1) made of a flexible material is provided in front of the support ring (20-3), the front cover (20-1) covers the front surface of the charging plug (19), and the front cover (20-1) is connected to the support ring (20-3) through a flexible connecting portion (20-2); there is second through-hole (22) on first end cover (1), it has the external screw thread to process on the lateral wall of charging plug (19), the external diameter of liner (20) is greater than the aperture of second through-hole (22), and the rear end of charging plug (19) is passed second through-hole (22) from first end cover (1) front and is stretched into first end cover (1) inboardly, is located that section charging plug (19) of first end cover (1) inboard and has lock nut (21).

6. The whole waterproof mechanism of battery pack as claimed in claim 1, wherein the front surface of the first end cap (1) has a second recess (8), the circuit board (11) is a flexible circuit board integrated on a sticker, the sticker is pasted in the second recess (8), a threading hole (9) is arranged between the bottom of the second recess (8) and the back surface of the first end cap (1), the threading hole (9) is divided into a first segment and a second segment from one end to the other end near the second recess (8), and the inner diameter of the first segment is smaller than the width of the second segment, so as to form a step at the connection between the first and second segments.

7. The waterproof mechanism for the whole battery pack according to any one of claims 1 to 6, wherein the case (2) is elongated, one end of the case (2) is open, which is the first opening (7), and the number of the fixing holes (24) is four, which are respectively located at four corners of the end cap.

8. The battery pack integral waterproof mechanism according to claim 7, wherein one end of the housing (2) away from the first opening (7) is also open, the opening is a second opening, a second end cap (4) is arranged on the second opening, a second annular enclosing plate (18) is arranged around the inner side surface of the second end cap (4), the second annular enclosing plate (18) is inserted into the second opening, and a sealing bush (5) is arranged between the second annular enclosing plate (18) and the inner side wall of the second opening; also there are four fixed orificess (24) on second end cover (4), and the fixed orifices (24) of second end cover (4) and fixed orifices (24) of first end cover (1) are the one-to-one form and arrange, bolt seat (3) are rectangular form, and it is vertical along casing (2) and casing (2) be a body coupling, and the both ends of bolt seat (3) align with the both ends of casing (2) respectively, the screw hole is the through-hole, also all has fastening screw (10) between fixed orifices (24) of second end cover (4) and the screw hole that corresponds.