CN216161898U

CN216161898U - Safety device for preventing lithium battery from short circuit

Info

Publication number: CN216161898U
Application number: CN202122086633.7U
Authority: CN
Inventors: 李六江
Original assignee: Baoding Xingchi New Energy Technology Co ltd
Current assignee: Baoding Xingchi New Energy Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-04-01
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a safety device for preventing a lithium battery from being short-circuited, and relates to the technical field of lithium battery processing. The battery box comprises a battery box, wherein a first groove is formed in the upper side of the battery box, metal sheets are arranged on the opposite sides of the inner wall of the first groove, a first spring and a first bulge are sequentially arranged on one side of each metal sheet, the first bulge is located on the periphery of the first spring, a metal sharp corner is arranged on the lower side of each metal sheet, a first wire is arranged on one side of the metal sharp corner, and a first contact piece is arranged at the other end of the first wire. According to the utility model, the sealing ring is arranged on the periphery of the pressing rod, so that the lower part of the second groove is sealed by the sealing ring, the pressure generated by relatively large heat emitted by the second contact piece and the first contact piece is not easy to leak, the second contact piece can be extruded by the second bulge, when the second contact piece is contacted with the first contact piece, the device is normally electrified to work, and the sealing ring is upwards pulled by the elastic force of the second spring, so that the sensitivity of the safety device is increased.

Description

Safety device for preventing lithium battery from short circuit

Technical Field

The utility model belongs to the technical field of lithium battery processing, and particularly relates to a safety device for preventing a lithium battery from being short-circuited.

Background

The lithium battery is a battery which uses lithium metal or lithium alloy as an anode material and uses a non-aqueous electrolyte solution, and is different from the lithium ion battery in that the lithium battery is a primary battery and the lithium battery is a rechargeable battery, and because the chemical characteristics of the lithium metal are very active, the lithium metal has very high requirements on the environment in processing, storage and use, so the lithium battery is not applied for a long time.

The existing lithium battery is used for a long time in the using process, the temperature rises, heat is easy to gather, short circuit can occur, the service life of the existing lithium battery is shortened, or the temperature and the internal pressure are too high to cause explosion to hurt people, a short circuit prevention safety device corresponding to the temperature and the internal pressure does not exist, and the using requirement of a user cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety device for preventing a lithium battery from being short-circuited, wherein the sealing ring is arranged on the periphery of the pressing rod to seal the lower part of the second groove, so that the pressure generated by relatively large heat emitted by the second contact piece and the first contact piece is not easy to leak, the second contact piece can be extruded by the second bulge, when the second contact piece contacts the first contact piece, the device is normally electrified to work, the sealing ring is upwards pulled by the elastic force of the second spring, the sensitivity of the safety device is increased, the safety device is timely powered off when the lithium battery is short-circuited, the service life of the lithium battery is prolonged, the use requirement of a user is met, the explosion possibility of the lithium battery is reduced, and the problems in the prior art are solved.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a safety device for preventing a lithium battery from being short-circuited comprises a battery box, wherein a first groove is formed in the upper side of the battery box, metal sheets are placed on the opposite sides of the inner wall of the first groove, a first spring and a first protrusion are sequentially arranged on one side of each metal sheet, the first protrusion is located on the periphery of the first spring, metal sharp corners are arranged on the lower sides of the two metal sheets, a first electric wire is arranged on one side of each metal sharp corner, and a first contact piece is arranged at the other end of the first electric wire; the battery box is internally provided with a second groove, the first contact piece is positioned in the second groove, the second groove is internally provided with a press rod in sliding fit, the periphery of the press rod is provided with a sealing ring, the upper end of the sealing ring is provided with two second springs, the lower end of the press rod is provided with a second bulge, the second bulge is positioned above the first contact piece, the second groove is internally provided with a second contact piece, the second contact piece is positioned between the second bulge and the first contact piece, and one side of the second contact piece is provided with a second wire.

Optionally, one side of the first contact plate is provided with a contact protrusion.

Optionally, a first limiting ring and a second limiting ring are sequentially arranged in the second groove, the first limiting ring is located above the second limiting ring, and the first limiting ring and the second limiting ring are in sliding fit with the press rod.

Optionally, the pressing rod is provided with a spring sheet around the pressing rod, the spring sheet is located between the first limiting ring and the second limiting ring, and two sides of the spring sheet are fixed on the inner wall of the second groove.

Optionally, one end of each of the two second springs is fixed to the lower side of the second limiting ring.

Optionally, one end of the pressing rod is provided with a key, and the key is positioned above the battery box.

Optionally, a key slot is formed in the upper side of the battery box, the key slot is in sliding fit with the pressing rod, and the key slot is located on one side of the first slot.

The embodiment of the utility model has the following beneficial effects:

according to one embodiment of the utility model, the sealing ring is arranged on the periphery of the pressing rod, so that the sealing ring seals the lower part of the second groove, the pressure generated by relatively large heat emitted by the second contact piece and the first contact piece is not easy to leak, the second contact piece can be extruded by the second bulge, when the second contact piece is in contact with the first contact piece, the device is normally electrified to work, the sealing ring is upwards pulled by the elastic force of the second spring, the sensitivity of the safety device is increased, the safety device is timely powered off when the lithium battery is in short circuit, the service life of the lithium battery is prolonged, the use requirement of a user is met, and the explosion possibility of the lithium battery is reduced.

Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of an internal structure according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structure diagram according to an embodiment of the utility model.

Wherein the figures include the following reference numerals:

the battery box comprises a battery box 1, a first groove 2, a metal sheet 3, a first spring 4, a first protrusion 5, a metal sharp corner 6, a first electric wire 7, a first contact piece 8, a contact protrusion 9, a key groove 10, a first limit ring 11, a press rod 12, a key 13, an elastic sheet 14, a second groove 15, a sealing ring 16, a second spring 17, a second limit ring 18, a second protrusion 19, a second contact piece 20 and a second electric wire 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

Referring to fig. 1-3, in the present embodiment, a safety device for preventing a short circuit of a lithium battery is provided, including: the battery box comprises a battery box 1, wherein a first groove 2 is formed in the upper side of the battery box 1, metal sheets 3 are placed on the opposite sides of the inner wall of the first groove 2, a first spring 4 and a first bulge 5 are sequentially arranged on one side of each metal sheet 3, the first bulge 5 is positioned on the periphery of the first spring 4, metal sharp corners 6 are arranged on the lower sides of the two metal sheets 3, a first electric wire 7 is arranged on one side of each metal sharp corner 6, and a first contact piece 8 is arranged at the other end of each first electric wire 7; the battery box 1 is internally provided with a second groove 15, the first contact piece 8 is positioned in the second groove 15, the second groove 15 is internally matched with a press rod 12 in a sliding way, the peripheral side of the press rod 12 is provided with a sealing ring 16, the upper end of the sealing ring 16 is provided with two second springs 17, the lower end of the press rod 12 is provided with a second bulge 19, the second bulge 19 is positioned above the first contact piece 8, the second groove 15 is internally provided with a second contact piece 20, the second contact piece 20 is positioned between the second bulge 19 and the first contact piece 8, and one side of the second contact piece 20 is provided with a second electric wire 21.

The application of one aspect of the embodiment is as follows: when the lithium battery protection device is used, the pressing rod 12 is pressed at first, the pressing rod 12 moves downwards to drive the second protrusion 19 to press the second contact piece 20 to contact with the first contact piece 8, the pressing rod 12 moves downwards to drive the sealing ring 16 to move downwards, at the moment, the prepared lithium battery is installed in the first groove 2 to be powered on for use, when a circuit is short-circuited, the second contact piece 20 and the first contact piece 8 generate heat in a larger mode, the second contact piece 20 and the first contact piece 8 generate heat to generate pressure, the sealing ring 16 is pressed to move upwards under the pressure of a sealed environment, the two second springs 17 contract to drive the sealing ring 16 to move upwards, the sealing ring 16 moves upwards to drive the pressing rod 12 and the second protrusion 19 to move upwards, the second contact piece 20 is not pressed by the second protrusion 19 to tilt upwards, the second contact piece 20 is far away from the first contact piece 8, the lithium battery protection device is powered off, and the lithium battery is completed.

Through installing sealing ring 16 according to pole 12 week side, make sealing ring 16 seal up the lower part of second groove 15, make second contact piece 20 and first contact piece 8 give off the difficult external leakage of pressure that great heat produced, can extrude second contact piece 20 through second arch 19, when second contact piece 20 contacts first contact piece 8, the normal circular telegram work of device, upwards carry and draw sealing ring 16 through second spring 17 elasticity, increase safety device sensitivity, safety device in time blocks the circular telegram when making lithium electricity short circuit, increase lithium cell life, satisfy user's user demand, reduce lithium cell explosion possibility.

The contact protrusion 9 is installed on one side of the first contact 8 in this embodiment, so that the second contact 20 is more easily contacted and electrified with the first contact 8 when being pressed by the second protrusion 19.

The second groove 15 of this embodiment is provided with the first limiting ring 11 and the second limiting ring 18 in sequence, the first limiting ring 11 is located above the second limiting ring 18, the first limiting ring 11, the second limiting ring 18 and the pressing rod 12 are in sliding fit, the first limiting ring 11 limits the displacement of the key 13, the elastic sheet 14 and the second spring 17 are prevented from being damaged due to excessive pressing, and the second limiting ring 18 reduces an opening above the sealing ring 16 to prevent air circulation.

In the embodiment, the elastic sheet 14 is arranged on the periphery of the pressing rod 12, the elastic sheet 14 is located between the first limiting ring 11 and the second limiting ring 18, two sides of the elastic sheet 14 are fixed on the inner wall of the second groove 15, and the pressing rod 12 is kept still when no external force is applied after the elastic sheet 14 controls the pressing rod 12 to move upwards or downwards.

One end of the two second springs 17 of this embodiment is fixed to the lower side of the second limit ring 18.

In the embodiment, a button 13 is installed at one end of the pressing rod 12, and the button 13 is located above the battery box 1, so that a user can press the button 13 conveniently to electrify the device in normal operation.

According to the embodiment, the upper side of the battery box 1 is provided with the key slot 10, the key slot 10 is in sliding fit with the pressing rod 12, the key slot 10 is located on one side of the first slot 2, when the key 13 is pressed, the key 13 can be hidden into the key slot 10, the surface of the device is smooth, the scratch damage is reduced, and the service life of the safety device is prolonged.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Claims

1. A safety device for preventing a lithium battery from being short-circuited, comprising: the battery box comprises a battery box (1), wherein a first groove (2) is formed in the upper side of the battery box (1), metal sheets (3) are placed on the opposite sides of the inner wall of the first groove (2), a first spring (4) and a first protrusion (5) are sequentially arranged on one side of each metal sheet (3), the first protrusion (5) is located on the peripheral side of the first spring (4), metal sharp corners (6) are arranged on the lower sides of the two metal sheets (3), a first electric wire (7) is arranged on one side of each metal sharp corner (6), and a first contact piece (8) is arranged at the other end of each first electric wire (7);

the battery box (1) is internally provided with a second groove (15), the first contact piece (8) is positioned in the second groove (15), the second groove (15) is internally matched with a press rod (12) in a sliding way, the peripheral side of the press rod (12) is provided with a sealing ring (16), the upper end of the sealing ring (16) is provided with two second springs (17), the lower end of the press rod (12) is provided with a second protrusion (19), the second protrusion (19) is positioned above the first contact piece (8), the second groove (15) is internally provided with a second contact piece (20), the second contact piece (20) is positioned between the second protrusion (19) and the first contact piece (8), and one side of the second contact piece (20) is provided with a second electric wire (21).

2. A safety device for preventing short-circuiting of a lithium battery according to claim 1, wherein the first contact piece (8) is provided at one side thereof with a contact projection (9).

3. The safety device for preventing the short circuit of the lithium battery as claimed in claim 1, wherein the second groove (15) is provided with a first limiting ring (11) and a second limiting ring (18) in sequence, the first limiting ring (11) is located above the second limiting ring (18), and the first limiting ring (11) and the second limiting ring (18) are in sliding fit with the pressing rod (12).

4. The safety device according to claim 1, wherein the pressing rod (12) is provided with a spring (14) around the circumference thereof, the spring (14) is disposed between the first limiting ring (11) and the second limiting ring (18), and both sides of the spring (14) are fixed to the inner wall of the second groove (15).

5. A safety device for preventing a short circuit of a lithium battery as claimed in claim 1, wherein one end of the two second springs (17) is fixed to the lower side of the second stopper ring (18).

6. A safety device for preventing a short circuit of a lithium battery as claimed in claim 1, wherein a button (13) is provided at one end of the pressing rod (12), and the button (13) is located above the battery case (1).

7. A safety device for preventing a short circuit of a lithium battery as claimed in claim 1, wherein the battery case (1) is formed at an upper side thereof with a key groove (10), the key groove (10) is slidably fitted with the push bar (12), and the key groove (10) is formed at a side of the first groove (2).