CN215266564U

CN215266564U - Lithium iron phosphate battery with safety device

Info

Publication number: CN215266564U
Application number: CN202121519077.1U
Authority: CN
Inventors: 朱鹏宇; 薛祥林; 周文杰
Original assignee: Anhui Zhitong New Energy Co ltd
Current assignee: Anhui Zhitong New Energy Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-12-21
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a lithium iron phosphate battery with a safety device, which comprises an upper cover, a lower box, a heat dissipation assembly arranged on the upper cover and four auxiliary positioning assemblies arranged inside the lower box, wherein the upper cover is arranged at the top of the lower box, the upper cover is provided with a first circular groove and a second circular groove, the first circular groove is positioned at the top of the second circular groove, and the first circular groove is communicated with the second circular groove; the radiating assembly comprises a round block, a connecting rod, a ring and a spring, the round block is arranged inside a first round groove, the connecting rod is vertically arranged inside a second round groove, the connecting rod is connected with the inner wall of the second round groove in a sliding mode, one end of the connecting rod extends to the inside of the first round groove and is connected with the bottom of the round block, the other end of the connecting rod extends to the inside of a lower box, the ring and the spring are arranged inside the lower box, and the ring is sleeved on the surface of the connecting rod. Through radiator unit's setting, avoided the lithium cell when using because the influence of temperature has reduced life and probably leads to serious accident's such as violent explosion fire problem.

Description

Lithium iron phosphate battery with safety device

Technical Field

The utility model relates to a safeties field, concretely relates to lithium iron phosphate battery with safeties.

Background

The lithium iron phosphate battery is a lithium ion battery which uses lithium iron phosphate (LiFePO4) as a positive electrode material and carbon as a negative electrode material, the rated voltage of a monomer is 3.2V, and the charge cut-off voltage is 3.6V-3.65V. In the charging process, part of lithium ions in the lithium iron phosphate are removed, transferred to a negative electrode through an electrolyte and embedded into a negative electrode carbon material; meanwhile, electrons are released from the anode and reach the cathode from an external circuit, so that the balance of chemical reaction is maintained. In the discharging process, lithium ions are separated from the negative electrode, reach the positive electrode through the electrolyte, simultaneously, the negative electrode releases electrons, and reach the positive electrode from an external circuit to provide energy for the outside.

At present, the lithium iron battery does not have a safety device when using, and the lithium battery can produce a large amount of heats when using for a long time, reduces its life, when the overheated condition appears, can lead to severe accidents such as violent explosion and fire.

In the prior art, when the lithium battery is used for a long time, a large amount of heat can be generated, the service life of the lithium battery is shortened, and serious accidents such as severe explosion, fire and the like can be caused when the lithium battery is overheated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lithium iron phosphate battery with safeties has solved and has had the lithium cell among the prior art when using for a long time, can produce a large amount of heats, reduces its life, when the overheated condition appears, can lead to the problem of serious accidents such as violent explosion and fire.

In order to achieve the above object, the utility model provides a following technical scheme: a lithium iron phosphate battery with a safety device comprises an upper cover, a lower box, a heat dissipation assembly and four auxiliary positioning assemblies, wherein the heat dissipation assembly is arranged on the upper cover, the four auxiliary positioning assemblies are arranged inside the lower box, the upper cover is arranged at the top of the lower box, a first circular groove and a second circular groove are formed in the upper cover, the first circular groove is positioned at the top of the second circular groove, and the first circular groove is communicated with the second circular groove;

the heat dissipation assembly comprises a round block, a connecting rod, a round ring and a spring, the round block is arranged in the first round groove, the connecting rod is vertically arranged in the second round groove, the connecting rod is connected with the inner wall of the second round groove in a sliding mode, one end of the connecting rod extends into the first round groove and is connected with the bottom of the round block, the other end of the connecting rod extends into the lower box, the round ring and the spring are both arranged in the lower box, the round ring is sleeved on the surface of the connecting rod, and the spring is located between the inner wall of the top of the lower box and the round ring;

a plurality of air holes are formed in the connecting rod at equal intervals.

Preferably, the battery body is arranged in the lower box, and one side of the inner wall of the lower box, which is far away from the auxiliary positioning assembly, is attached to the side face of the battery body.

Preferably, the auxiliary positioning assembly comprises a rotating shaft, a connecting plate and an extrusion plate, the rotating shaft is installed on the inner wall of the lower box, one end of the connecting plate is rotatably connected with the rotating shaft, the other end of the connecting plate is connected with the extrusion plate, and the extrusion plate is far away from one side of the connecting plate and is attached to the surface of the battery body.

Preferably, two bolts are arranged at the top of the upper cover, and the upper cover is connected with the lower box through the bolts.

Preferably, the connecting rod is a hollow rod, and the bottom of the connecting rod is communicated with the interior of the lower box.

The utility model has the advantages that: its effect is when battery body is using, the inside temperature of lower box risees, lead to the inside atmospheric pressure grow of lower box, make the connecting rod along second circular slot rebound, the connecting rod removes and drives the fritter and breaks away from first circular slot, connecting rod top and external contact this moment, the inside heat of lower box is through the gas pocket discharge to the external world, when the power disconnection or the inside atmospheric pressure of lower box reduce, under the additional effect of spring, the spring passes through the ring and drives the connecting rod downstream, slowly get back to original position, avoided the lithium cell when using because the influence of temperature has reduced life and probably leads to the problem of serious accidents such as violent explosion fire.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of the overall structure of a lithium iron phosphate battery with a safety device according to the present invention;

fig. 2 is a schematic structural view of the lithium iron phosphate battery with a safety device with the upper cover removed integrally;

fig. 3 is a schematic view of an initial cross-sectional structure of an auxiliary positioning assembly of a lithium iron phosphate battery with a safety device according to the present invention;

fig. 4 is the schematic diagram of the enlarged structure of the position a of the lithium iron phosphate battery with the safety device of the present invention.

In the figure: 1. an upper cover; 2. a box is lowered; 3. a first circular groove; 4. a second circular groove; 5. a round block; 6. a connecting rod; 7. a circular ring; 8. a spring; 9. air holes; 10. a rotating shaft; 11. a connecting plate; 12. a pressing plate; 13. a battery body; 14. and (4) bolts.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, a lithium iron phosphate battery with a safety device comprises an upper cover 1, a lower box 2, a heat dissipation assembly arranged on the upper cover 1 and four auxiliary positioning assemblies arranged inside the lower box 2, wherein the upper cover 1 is arranged at the top of the lower box 2, a first circular groove 3 and a second circular groove 4 are formed in the upper cover 1, the first circular groove 3 is arranged at the top of the second circular groove 4, and the first circular groove 3 is communicated with the second circular groove 4;

the heat dissipation assembly comprises a round block 5, a connecting rod 6, a round ring 7 and a spring 8, the round block 5 is arranged inside the first round groove 3, the connecting rod 6 is vertically arranged inside the second round groove 4, the connecting rod 6 is in sliding connection with the inner wall of the second round groove 4, one end of the connecting rod 6 extends into the first round groove 3 and is connected with the bottom of the round block 5, the other end of the connecting rod 6 extends into the lower box 2, the round ring 7 and the spring 8 are both arranged inside the lower box 2, the round ring 7 is sleeved on the surface of the connecting rod 6, and the spring 8 is positioned between the inner wall of the top of the lower box 2 and the round ring 7;

a plurality of air holes 9 are arranged on the connecting rod 6 at equal intervals.

The inside of lower box 2 is provided with battery body 13, and auxiliary positioning subassembly is kept away from inner wall one side of lower box 2 and is laminated with battery body 13 side.

Auxiliary positioning subassembly includes pivot 10, connecting plate 11 and stripper plate 12, pivot 10 is installed on the inner wall of box 2 down, 11 one ends of connecting plate are rotated with pivot 10 and are connected, and the connecting plate 11 other end is connected with stripper plate 12, stripper plate 12 keeps away from one side and battery body 13 surface laminating of connecting plate 11, its effect is when battery body 13 puts into, four stripper plates 12 of battery body 13 bottom extrusion, under the effect of four pivot 10, make four stripper plates 12 rotatory to vertical direction, put into the back completely when battery body 13, four stripper plates 12 are in vertical state and laminate with battery body 13 side this moment, make battery body 13 more stable when using.

Two bolts 14 are arranged on the top of the upper cover 1, the upper cover 1 is connected with the lower box 2 through the bolts 14, and the upper cover 1 is fixedly connected with the lower box 2 through the bolts 14.

Connecting rod 6 is hollow pole, and the bottom of connecting rod 6 and the inside intercommunication of box 2 down, and its effect is the heat of being convenient for promotes connecting rod 6 and removes.

The utility model discloses theory of operation and use flow: when the device is used, a battery body 13 is put into the lower box 2, the bottom of the battery body 13 extrudes the four extrusion plates 12, under the action of the four rotating shafts 10, the four extrusion plates 12 rotate towards the vertical direction, after the battery body 13 is completely put into the device, the four extrusion plates 12 are in the vertical state and are attached to the side faces of the battery body 13, so that the battery body 13 is more stable in use, the upper cover 1 and the lower box 2 are fixedly connected through the bolts 14, when the battery body 13 is used, the temperature inside the lower box 2 rises, the air pressure inside the lower box 2 is increased, the connecting rod 6 moves upwards along the second circular groove 4, the connecting rod 6 moves to drive the circular block 5 to be separated from the first circular groove 3, the top of the connecting rod is contacted with the outside, the heat inside the lower box 2 is discharged to the outside through the air hole 9, when a power supply is disconnected or the air pressure inside the lower box 2 is reduced, under the auxiliary action of spring 8, spring 8 drives connecting rod 6 through ring 7 and moves down, slowly gets back to original position, has avoided the lithium cell to reduce life and probably lead to serious accident's such as violent explosion fire problem because of the influence of temperature when using.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The lithium iron phosphate battery with the safety device is characterized by comprising an upper cover (1), a lower box (2), a heat dissipation assembly arranged on the upper cover (1) and four auxiliary positioning assemblies arranged inside the lower box (2), wherein the upper cover (1) is arranged at the top of the lower box (2), a first circular groove (3) and a second circular groove (4) are formed in the upper cover (1), the first circular groove (3) is positioned at the top of the second circular groove (4), and the first circular groove (3) is communicated with the second circular groove (4);

the heat dissipation component comprises a round block (5), a connecting rod (6), a round ring (7) and a spring (8), the round block (5) is arranged in the first round groove (3), the connecting rod (6) is vertically arranged in the second round groove (4), the connecting rod (6) is connected with the inner wall of the second circular groove (4) in a sliding way, one end of the connecting rod (6) extends into the first circular groove (3) and is connected with the bottom of the circular block (5), and the other end of the connecting rod (6) extends to the interior of the lower box (2), the circular ring (7) and the spring (8) are both arranged in the lower box (2), the circular ring (7) is sleeved on the surface of the connecting rod (6), and the spring (8) is positioned between the inner wall of the top of the lower box (2) and the circular ring (7);

a plurality of air holes (9) are formed in the connecting rod (6) at equal intervals.

2. The lithium iron phosphate battery with safety device according to claim 1, characterized in that a battery body (13) is arranged inside the lower box (2), and one side of the auxiliary positioning assembly, which is far away from the inner wall of the lower box (2), is attached to the side surface of the battery body (13).

3. The lithium iron phosphate battery with safety device according to claim 2, wherein the auxiliary positioning assembly comprises a rotating shaft (10), a connecting plate (11) and a pressing plate (12), the rotating shaft (10) is installed on the inner wall of the lower box (2), one end of the connecting plate (11) is rotatably connected with the rotating shaft (10), the other end of the connecting plate (11) is connected with the pressing plate (12), and one side of the pressing plate (12) far away from the connecting plate (11) is attached to the surface of the battery body (13).

4. The lithium iron phosphate battery with safety device according to claim 1, characterized in that two bolts (14) are arranged on the top of the upper cover (1), and the upper cover (1) is connected with the lower box (2) through the bolts (14).

5. The lithium iron phosphate battery with safety device according to claim 1, characterized in that the connecting rod (6) is a hollow rod, and the bottom of the connecting rod (6) is communicated with the inside of the lower box (2).