CN213414849U

CN213414849U - Protection device of lithium cell group

Info

Publication number: CN213414849U
Application number: CN202022144708.8U
Authority: CN
Inventors: 张慧玲
Original assignee: Shenzhen Ampere Times Technology Co ltd
Current assignee: Shenzhen Ampere Times Technology Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-06-11
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses a protector of lithium cell group, set up to the open-ended protection outer container including the top, there is the protection case lid at the top of protection outer container through screw fixed mounting, a semi-cylindrical undercut groove has all been seted up to the inside four edges and corners position department of protection outer container, rotates on the top inner wall in semi-cylindrical undercut groove and the bottom inner wall and installs same first pivot, and one side welded fastening that first pivot is close to the vertical the central axis of protection outer container has a first rectangle connecting plate, and first rectangle connecting plate is close to one side of the vertical central axis of protection outer container and has seted up first rectangle undercut groove, and bonds on the recess of just first rectangle keeps away from its open-ended one side inner wall and be fixed with an elastic silica gel pad. The utility model discloses can diversely carry out safety protection to lithium cell group, effectively avoid lithium cell group to be broken.

Description

Protection device of lithium cell group

Technical Field

The utility model relates to a lithium cell group protects technical field, especially relates to a protector of lithium cell group.

Background

The lithium battery is a primary battery which takes lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, a plurality of lithium batteries are connected in series or in parallel in a lithium battery pack, the miniaturization equipment is increased increasingly along with the development of the microelectronic technology at the end of the twentieth century, the high requirement is provided for a power supply, and the lithium batteries enter a large-scale practical stage; at present, the lithium battery pack inevitably falls in the production and transportation processes, which can damage the lithium battery and reduce the performance of the lithium battery, so a protection device of the battery pack is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a protection device of a lithium battery pack.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a protection device of a lithium battery pack comprises a protection outer box with an open top, wherein a protection box cover is fixedly installed at the top of the protection outer box through screws, semi-cylindrical invagination grooves are formed in the positions of four edges and corners inside the protection outer box, the top inner wall and the bottom inner wall of each semi-cylindrical invagination groove are rotatably installed with a same first rotating shaft, a first rectangular connecting plate is fixedly welded on one side, close to the vertical central axis of the protection outer box, of each first rotating shaft, a first rectangular invagination groove is formed in one side, close to the vertical central axis of the protection outer box, of each first rectangular invagination groove, an elastic silica gel pad is fixedly bonded on the inner wall of one side, away from the opening, of each first rectangular connecting plate, a movable rectangular plate is vertically placed inside the protection outer box, and a rectangular cavity is formed in each movable rectangular plate, the inner wall of one side of the rectangular cavity, which is close to the corresponding semi-cylindrical invagination groove, is provided with a trapezoidal through hole, the inner wall of the other side of the rectangular cavity is provided with a rectangular guide seat in a sliding way, one side of the rectangular guide seat, which is far away from the vertical central axis of the protective outer box, is rotatably provided with a second rotating shaft, a second rectangular connecting plate which is fixedly bonded with an elastic silica gel pad is fixedly welded on the second rotating shaft, the outer side of the second rectangular connecting plate is in sliding contact with the inner side wall of the first rectangular invagination groove, the bottoms of the movable rectangular plates are fixedly provided with a plurality of first springs in a compressed state at equal intervals, the bottom ends of the first springs are fixedly welded on the inner wall of the bottom of the protective outer box, one side of each of the four movable rectangular plates, which is close to the vertical central axis of the protective outer box, is provided with a V-shaped placing, the top four corners of lithium cell group all is provided with a V-arrangement mount pad that forms rather than the top integration processing, and the V-arrangement mount pad passes through screw fixed mounting in the inside of the V-arrangement standing groove that corresponds, and the equal fixed mounting in one side four corners of the vertical central axis of protection outer container second spring is kept away from to the activity rectangular plate, and the one end fixed mounting that the second spring kept away from the activity rectangular plate that corresponds is on the lateral wall that the protection outer container corresponds.

Preferably, four corners of the bottom of the protective outer box are all provided with arc-shaped chamfers.

Preferably, the inner walls of the top and the bottom of the semi-cylindrical invagination groove are respectively welded and fixed with a first bearing, and the inner sides of the inner rings of the two first bearings positioned in the same semi-cylindrical invagination groove are welded and fixedly sleeved on the outer side of the first rotating shaft.

Preferably, one side of the rectangular guide seat close to the vertical central axis of the protective outer box is slidably sleeved with a rectangular guide rail fixedly welded with the inner wall of the other side of the rectangular cavity.

Preferably, the minimum distance between the inner walls of the two sides of the trapezoidal through hole is larger than the width of the first rectangular connecting plate, and the height of the first rectangular connecting plate is smaller than the height of the trapezoidal through hole.

Preferably, the lithium battery pack is electrically connected with a wire holder fixedly mounted at the top of the protective box cover through a wire, and the top of the protective box cover is also rotatably mounted with a U-shaped handle.

The utility model discloses can diversely carry out safety protection to lithium cell group, effectively avoid lithium cell group to be broken.

Drawings

Fig. 1 is a schematic front view of a protection device for a lithium battery pack according to the present invention;

fig. 2 is a schematic front view of a cross-sectional structure of a protection device for a lithium battery pack according to the present invention;

fig. 3 is a schematic view of a top-down structure of the protective outer case in the protective device of the lithium battery pack.

In the figure: the protective box comprises a protective outer box 1, a protective box cover 2, a wiring seat 3, a semi-cylindrical invagination groove 4, a first rotating shaft 5, a first rectangular connecting plate 6, a first rectangular invagination groove 7, a movable rectangular plate 8, a rectangular cavity 9, a trapezoidal through hole 10, a rectangular guide seat 11, a rectangular guide rail 12, a second rotating shaft 13, a second rectangular connecting plate 14, an elastic silica gel pad 15, a first spring 16, a V-shaped placing groove 17, a lithium battery pack 18, a V-shaped mounting seat 19 and a second spring 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a protection device for a lithium battery pack comprises a protection outer box 1 with an open top, a protection box cover 2 is fixedly installed at the top of the protection outer box 1 through screws, semi-cylindrical invagination grooves 4 are respectively formed in the positions of four corners inside the protection outer box 1, the same first rotating shaft 5 is rotatably installed on the inner walls of the top and the bottom of each semi-cylindrical invagination groove 4, a first rectangular connecting plate 6 is fixedly welded on one side of each first rotating shaft 5, which is close to the vertical central axis of the protection outer box 1, a first rectangular invagination groove 7 is formed in one side of each first rectangular connecting plate 6, which is close to the vertical central axis of the protection outer box 1, an elastic silica gel pad 15 is fixedly bonded on the inner wall of one side, which is far away from the open end, of each first rectangular connecting plate 6 is provided with a movable rectangular plate 8 vertically placed inside the protection outer box 1, a rectangular cavity 9 is arranged on the movable rectangular plate 8, a trapezoidal through hole 10 is arranged on the inner wall of one side of the rectangular cavity 9 close to the corresponding semi-cylindrical invagination groove 4, a rectangular guide seat 11 is slidably arranged on the inner wall of the other side of the rectangular cavity 9, a second rotating shaft 13 is rotatably arranged on one side of the rectangular guide seat 11 far away from the vertical central axis of the protection outer box 1, a second rectangular connecting plate 14 which is fixedly bonded with an elastic silica gel pad 15 is welded on the second rotating shaft 13, the outer side of the second rectangular connecting plate 14 is in sliding contact with the inner side wall of the first rectangular invagination groove 7, a plurality of first springs 16 which are in a compressed state are fixedly arranged at equal intervals at the bottom of the movable rectangular plate 8, the bottom ends of the first springs 16 are fixedly welded on the inner wall of the bottom of the protection outer box 1, one side of each of the four movable rectangular plates 8 close to the vertical central axis of the protection, the lithium battery packs 18 which are contacted with the inner walls of the bottoms of the V-shaped placing grooves 17 are placed in the four V-shaped placing grooves 17, four corners of the tops of the lithium battery packs 18 are respectively provided with a V-shaped mounting seat 19 which is integrally processed with the tops of the lithium battery packs, and V-arrangement mount pad 19 passes through screw fixed mounting in the inside of the V-arrangement standing groove 17 that corresponds, and lithium cell group 18 has a fixed mounting at the connection terminal 3 at 2 tops of protection case lid through wire electric connection, and the top of protection case lid 2 still rotates and installs a U-shaped handle, and the equal fixed mounting in one side four corners of protection outer container 1 vertical the central axis second spring 20 is kept away from to activity rectangular plate 8, and the one end fixed mounting that second spring 20 kept away from corresponding activity rectangular plate 8 is on the lateral wall that protection outer container 1 corresponds, the utility model discloses can diversely carry out safety protection to lithium cell group 18, effectively avoided lithium cell group 18 to be broken.

The utility model discloses in, the bottom four corners of protection outer container 1 all sets up to convex chamfer, equal welded fastening has a first bearing on the top inner wall of semi-cylindrical invagination groove 4 and the bottom inner wall, the fixed suit of inner circle inboard welding that is located two first bearings of same semi-cylindrical invagination groove 4 is in the outside of first pivot 5, rectangle guide holder 11 is close to one side sliding sleeve of 1 vertical the central axis of protection outer container and is equipped with one with rectangle cavity 9 opposite side inner wall welded fastening's rectangular guide rail 12, minimum distance between the 10 both sides inner walls of trapezoidal through-hole is big than the width of first rectangle connecting plate 6, the height of first rectangle connecting plate 6 is little than the height of trapezoidal through-hole 10, the utility model discloses can diversely carry out safety protection to lithium cell group 18, effectively avoided lithium cell group 18 to be broken.

In the utility model, when the device is dropped, the lithium battery pack 18 drives the four movable rectangular plates 8 to move in position in the protective outer box 1, the rectangular movable plate 8 drives the rectangular guide rail 12 on the rectangular cavity 9 to slide on the corresponding rectangular guide seat 11, the rectangular movable plate 8 also drives the second rectangular connecting plate 14 to move in position through the rectangular guide rail 12 and the rectangular guide seat 11, so that the rectangular guide seat 11 rotates on the second rectangular connecting plate 14 through the second rotating shaft 13, the second rotating shaft 13 drives the second rectangular connecting plate 14 to slide in the corresponding first rectangular invagination groove 7, the second rectangular connecting plate 14 stretches or compresses the corresponding elastic silica gel pad 15, at the moment, the second rectangular connecting plate 14 drives the first rectangular connecting plate 6 to rotate through the first rectangular invagination groove 7, the first rectangular connecting plate 6 drives the first rotating shaft 5 to rotate in the semi-cylindrical invagination groove 4, simultaneously, the rectangular movable plate 8 stretches or compresses the corresponding first spring 16 and the second spring 20, so that the impact force between the protective outer box 1 and the ground is effectively relieved, the lithium battery pack 18 is effectively protected safely, and the lithium battery pack 18 is prevented from being damaged due to falling.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A protection device of a lithium battery pack comprises a protection outer box (1) with the top provided with an opening, wherein a protection box cover (2) is fixedly installed at the top of the protection outer box (1) through screws, and is characterized in that semi-cylindrical invagination grooves (4) are respectively formed in the positions of four edges and corners inside the protection outer box (1), the same first rotating shaft (5) is rotatably installed on the inner wall of the top and the inner wall of the bottom of each semi-cylindrical invagination groove (4), a first rectangular connecting plate (6) is fixedly welded on one side, close to the vertical central axis of the protection outer box (1), of each first rotating shaft (5), a first rectangular invagination groove (7) is formed in one side, close to the vertical central axis of the protection outer box (1), of each first rectangular connecting plate (6), an elastic silica gel pad (15) is fixedly bonded on the inner wall of one side, far away from the opening, of, one side of the first rectangular connecting plate (6) close to the vertical central axis of the protective outer box (1) is provided with a movable rectangular plate (8) vertically placed in the protective outer box (1), the movable rectangular plate (8) is provided with a rectangular cavity (9), the inner wall of one side of the rectangular cavity (9) close to the corresponding semi-cylindrical invagination groove (4) is provided with a trapezoidal through hole (10), the inner wall of the other side of the rectangular cavity (9) is provided with a rectangular guide seat (11) in a sliding way, one side of the rectangular guide seat (11) far away from the vertical central axis of the protective outer box (1) is provided with a second rotating shaft (13) in a rotating way, the second rotating shaft (13) is fixedly welded with a second rectangular connecting plate (14) which is fixedly bonded with an elastic silica gel pad (15), the outer side of the second rectangular connecting plate (14) is in sliding contact with the inner side wall of the first, a plurality of first springs (16) in a compressed state are fixedly installed at the bottom of each movable rectangular plate (8) at equal intervals, the bottom ends of the first springs (16) are fixedly welded on the inner wall of the bottom of the protection outer box (1), one side, close to the vertical central axis of the protection outer box (1), of each of the four movable rectangular plates (8) is provided with a V-shaped placing groove (17) with the top provided with an opening, a lithium battery pack (18) which is in contact with the inner wall of the bottom of each V-shaped placing groove (17) is placed inside each of the four V-shaped placing grooves (17), four corners of the top of each lithium battery pack (18) are respectively provided with a V-shaped mounting seat (19) which is integrally processed with the top of each V-shaped mounting seat, each V-shaped mounting seat (19) is fixedly installed inside the corresponding V-shaped placing groove (17) through a screw, and four corners of one side, far away from the vertical central axis of the protection outer box, one end of the second spring (20) far away from the corresponding movable rectangular plate (8) is fixedly arranged on the corresponding side wall of the protective outer box (1).

2. The lithium battery pack protection device according to claim 1, wherein four corners of the bottom of the outer protection box (1) are rounded.

3. The lithium battery pack protection device according to claim 1, wherein a first bearing is welded and fixed on the top inner wall and the bottom inner wall of the semi-cylindrical recessed groove (4), and inner rings of two first bearings located in the same semi-cylindrical recessed groove (4) are welded and fixed on the outer side of the first rotating shaft (5).

4. The protection device of the lithium battery pack as claimed in claim 1, wherein a rectangular guide rail (12) welded and fixed with the inner wall of the other side of the rectangular cavity (9) is slidably sleeved on one side of the rectangular guide seat (11) close to the vertical central axis of the protection outer box (1).

5. The lithium battery pack protection device according to claim 1, wherein the minimum distance between the inner walls of the trapezoidal through holes (10) is greater than the width of the first rectangular connecting plate (6), and the height of the first rectangular connecting plate (6) is less than the height of the trapezoidal through holes (10).

6. The lithium battery pack protection device according to claim 1, wherein the lithium battery pack (18) is electrically connected with a wire holder (3) fixedly arranged on the top of the protection box cover (2) through a wire, and a U-shaped handle is rotatably arranged on the top of the protection box cover (2).