CN216529000U

CN216529000U - Lithium ion battery cell with short-circuit protection structure

Info

Publication number: CN216529000U
Application number: CN202122753347.1U
Authority: CN
Inventors: 董健锋
Original assignee: Hunan Ranxu Energy Technology Co ltd
Current assignee: Hunan Ranxu Energy Technology Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-13
Anticipated expiration: 2031-11-11

Abstract

The utility model discloses a lithium ion battery cell with a short-circuit protection structure, which comprises a battery shell, wherein sliding bins are symmetrically arranged at the bottoms of two sides in the battery shell, supporting plates are connected in the sliding bins in a sliding manner, a circuit protection assembly is arranged at the bottom of each supporting plate, a battery cell is arranged between the tops of two groups of supporting plates, and a plurality of groups of conducting blocks A are uniformly arranged at the top of the battery cell; according to the utility model, under the matching of the sliding bin, the supporting plate, the sliding chute, the shifting sheet, the heat conducting bin, the piston, the spring A, the inserted bar, the inner sleeve, the spring B, the outer sleeve and the mounting plate, when the battery is in short circuit, the temperature of the battery core can be rapidly raised, when the temperature is raised to a certain degree, the lithium battery can be automatically controlled to be disconnected according to the temperature on the surface of the battery core, the phenomenon that the battery core of the lithium battery is damaged due to overhigh temperature is prevented, and therefore, the lithium battery is protected.

Description

Lithium ion battery cell with short-circuit protection structure

Technical Field

The utility model relates to the technical field of lithium ions, in particular to a lithium ion battery cell with a short-circuit protection structure.

Background

Lithium ion battery: is a secondary battery (rechargeable battery) which mainly depends on lithium ion movement between a positive electrode and a negative electrode, and Li + is inserted and extracted back and forth between the two electrodes during charging and discharging: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; when discharging, the battery generally adopts a material containing lithium elements as an electrode, which is a representative of a modern high-performance battery, the temperature of the lithium battery can be rapidly increased when short circuit occurs, so that the lithium battery is burnt or guaranteed, and a protection structure is needed to protect the lithium battery;

the existing lithium ion battery cell has the following inconveniences:

the inside of the existing lithium battery is mostly not provided with a protection circuit protection device, so that when the short circuit of the lithium battery occurs in external equipment, the lithium battery is extremely easy to damage and can also generate the possibility of explosion, and some lithium batteries are protected by external short-circuit switches, but the method can only be applied to aluminum shell batteries at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lithium ion battery cell with a short-circuit protection structure, so as to solve the problem that the battery cell cannot be protected in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a lithium ion battery cell with short-circuit protection structure, includes battery case, the bottom symmetry of the inside both sides of battery case is equipped with the sliding bin, the inside sliding connection of sliding bin has the backup pad, the bottom of backup pad is equipped with the circuit protection subassembly, and is two sets of be equipped with electric core between the top of backup pad, the top of electric core evenly is equipped with multiunit conducting block A, battery case's top evenly is equipped with multiunit conducting block B.

Preferably, the circuit protection subassembly comprises spout, plectrum, heat conduction storehouse, piston, spring A, inserted bar, interior sleeve pipe, spring B, outer tube and mounting panel, one side of backup pad bottom is equipped with the mounting panel, one side of mounting panel is equipped with the outer tube, the outside cover of outer tube is equipped with spring B, be equipped with interior sleeve pipe under the sliding bin, interior sleeve pipe is located the inboard of outer tube, the bottom symmetry of battery case one end both sides is equipped with the spout, the inside sliding connection of spout has the backup pad, the one end of plectrum links to each other with the backup pad, one side at sliding bin top is equipped with heat conduction storehouse, the inside sliding connection in heat conduction storehouse has the piston, the bottom of piston is equipped with the inserted bar, the outside of inserted bar is equipped with spring A, the one end of inserted bar is equipped with logical groove.

Preferably, one side of the supporting plate is made of an arc-shaped structure, and the other side of the shifting piece is provided with a groove.

Preferably, one side at the top of the sliding bin is provided with a through hole, and the inserted bar is matched with the through hole.

Preferably, the through groove and the support plate are mutually matched.

Preferably, the heat conduction bin is made of a copper material, and the piston is matched with the heat conduction bin.

Compared with the prior art, the utility model has the beneficial effects that: the lithium ion battery cell with the short-circuit protection structure;

through the cooperation of sliding bin, backup pad, spout, plectrum, heat conduction storehouse, piston, spring A, inserted bar, interior sleeve pipe, spring B, outer tube and mounting panel, when the short circuit takes place for the battery, the temperature of electric core can rise rapidly, when the temperature risees to a certain extent, can break off according to the temperature automatic control lithium cell on electric core surface, prevents that the electric core of lithium cell from leading to the condition of damage to taking place owing to the high temperature to the effect of protection has been played to the lithium cell.

Drawings

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is an enlarged view of FIG. 1 at A;

figure 4 is a side view of the bayonet of the present invention.

In the figure: 1. a battery case; 2. an electric core; 3. a conductive block A; 4. a conductive block B; 5. a chute; 6. a shifting sheet; 7. a heat conducting bin; 8. a piston; 9. a spring A; 10. a sliding bin; 11. inserting a rod; 12. an inner sleeve; 13. a spring B; 14. an outer sleeve; 15. mounting a plate; 16. a support plate; 17. a through groove.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides an embodiment: the utility model provides a lithium ion battery cell with short-circuit protection structure, including battery case 1, the bottom symmetry of the inside both sides of battery case 1 is equipped with sliding bin 10, sliding bin 10's inside sliding connection has backup pad 16, can play the effect of support, backup pad 16's bottom is equipped with the circuit protection subassembly, be equipped with electric core 2 between the top of two sets of backup pads 16, electric core 2's top evenly is equipped with multiunit conducting block A3, convenient switch on, battery case 1's top evenly is equipped with multiunit conducting block B4.

Furthermore, the circuit protection assembly comprises a sliding chute 5, a shifting block 6, a heat conducting bin 7, a piston 8, a spring A9, an inserting rod 11, an inner sleeve 12, a spring B13, an outer sleeve 14 and a mounting plate 15, wherein the mounting plate 15 is arranged on one side of the bottom of the supporting plate 16, the outer sleeve 14 is arranged on one side of the mounting plate 15, the spring B13 is sleeved on the outer side of the outer sleeve 14, the inner sleeve 12 is arranged right below the sliding bin 10, the inner sleeve 12 is positioned on the inner side of the outer sleeve 14, the sliding chutes 5 are symmetrically arranged at the bottoms of two sides of one end of the battery shell 1, the supporting plate 16 is connected inside the sliding chute 5 in a sliding manner, one end of the shifting block 6 is connected with the supporting plate 16, the heat conducting bin 7 is arranged on one side of the top of the sliding bin 10, the piston 8 is connected inside the heat conducting bin 7 in a sliding manner, the inserting rod 11 is arranged at the bottom of the piston 8, the spring A9 is arranged on the outer side of the inserting rod 11, one end of the inserting rod 11 is provided with a through groove 17, when the temperature of the electric core 2 rises to a certain degree, the circuit thereof can be automatically broken.

Further, one side of the supporting plate 16 is made of an arc-shaped structure, and the other side of the shifting piece 6 is provided with a groove, so that the battery cell 2 can be driven to move downwards in the subsequent use process, and the circuit of the battery cell 2 is disconnected.

Furthermore, one side at the top of the sliding bin 10 is provided with a through hole, and the inserted bar 11 is matched with the through hole, so that the inserted bar 11 can move downwards along the sliding bin 10.

Further, the through grooves 17 are matched with the supporting plate 16, so that the supporting plate 16 can move conveniently.

Further, the heat conducting bin 7 is made of a copper material, and the piston 8 and the heat conducting bin 7 are matched with each other, so that the heat conducting effect of the heat conducting bin 7 is improved.

The working principle is as follows: when a short circuit occurs, the temperature of the battery cell 2 rises rapidly, the temperature on the surface of the battery cell 2 is transferred to the heat conducting bin 7, so that the air in the cavity at the top of the piston 8 expands, and further the piston 8 is pushed to move downwards, the spring a9 is compressed, and the insertion rod 11 is driven to move downwards, when the insertion rod 11 moves downwards to a specified position, the support plate 16 is overlapped with the through groove 17, so that the spring B13 resets, the mounting plate 15 and the outer sleeve 14 are driven to move, the support plate 16 is inserted into the through groove 17, so that the position of the battery cell 2 is driven to move downwards, the conductive block A3 is separated from the conductive block B4, so that a circuit of the battery cell 2 is disconnected, after the maintenance of the external circuit is completed, the two groups of poking pieces 6 are pulled to approach each other, the support plate 16 is separated from the through groove 17, the battery cell 2 is driven to move upwards, the conductive block A3 is reconnected with the conductive block B4, and the spring a9 resets to push the piston 8 to move upwards, so that the piston 8 is returned to its original position.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, e.g., as either a fixed connection or a removable connection, unless expressly stated or limited otherwise; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. The utility model provides a lithium ion battery cell with short-circuit protection structure, includes battery case (1), its characterized in that: the battery case is characterized in that sliding bins (10) are symmetrically arranged at the bottoms of two inner sides of the battery case (1), a supporting plate (16) is connected to the inner portions of the sliding bins (10) in a sliding mode, a circuit protection assembly is arranged at the bottom of the supporting plate (16), two groups of battery cores (2) are arranged between the tops of the supporting plate (16), multiple groups of conducting blocks A (3) are evenly arranged at the tops of the battery cores (2), and multiple groups of conducting blocks B (4) are evenly arranged at the tops of the battery case (1).

2. The lithium ion battery cell with the short-circuit protection structure of claim 1, wherein: the circuit protection assembly comprises a sliding groove (5), a shifting sheet (6), a heat conducting bin (7), a piston (8), a spring A (9), an inserting rod (11), an inner sleeve (12), a spring B (13), an outer sleeve (14) and a mounting plate (15), wherein the mounting plate (15) is arranged on one side of the bottom of the supporting plate (16), the outer sleeve (14) is arranged on one side of the mounting plate (15), the spring B (13) is sleeved on the outer side of the outer sleeve (14), the inner sleeve (12) is arranged under the sliding bin (10), the inner sleeve (12) is positioned on the inner side of the outer sleeve (14), the sliding grooves (5) are symmetrically arranged at the bottoms of two sides of one end of the battery shell (1), the supporting plate (16) is connected to the inside of the sliding groove (5), one end of the shifting sheet (6) is connected with the supporting plate (16), the heat conducting bin (7) is arranged on one side of the top of the sliding bin (10), the inside sliding connection of heat conduction storehouse (7) has piston (8), the bottom of piston (8) is equipped with inserted bar (11), the outside of inserted bar (11) is equipped with spring A (9), the one end of inserted bar (11) is equipped with logical groove (17).

3. The lithium ion battery cell with the short-circuit protection structure of claim 2, wherein: one side of the supporting plate (16) is made of an arc-shaped structure, and the other side of the shifting piece (6) is provided with a groove.

4. The lithium ion battery cell with the short-circuit protection structure of claim 1, wherein: one side at the top of the sliding bin (10) is provided with a through hole, and the inserted bar (11) is matched with the through hole.

5. The lithium ion battery cell with the short-circuit protection structure of claim 2, wherein: the through grooves (17) are matched with the supporting plate (16) mutually.

6. The lithium ion battery cell with the short-circuit protection structure of claim 2, wherein: the heat conducting bin (7) is made of a copper material, and the piston (8) is matched with the heat conducting bin (7) mutually.