CN214043909U

CN214043909U - Environment-friendly lithium iron phosphate battery

Info

Publication number: CN214043909U
Application number: CN202022989191.2U
Authority: CN
Inventors: 王骏
Original assignee: Wuhan Gonghelong Power Engineering Co ltd
Current assignee: Wuhan Gonghelong Power Engineering Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-08-24
Anticipated expiration: 2030-12-14

Abstract

The utility model discloses an environment-friendly lithium iron phosphate battery relates to lithium iron phosphate battery technical field. The utility model discloses a lithium battery drain pan, upper cover and utmost point ear, lithium battery drain pan top joint has the upper cover, utmost point ear is located upper cover one side, the upper cover upper surface is kept away from first exhaust hole and second exhaust hole have been seted up to one side of utmost point ear, first exhaust hole with second exhaust hole middle part is provided with connect the through-hole, the inside atmospheric pressure valve that is provided with of first exhaust hole, the atmospheric pressure valve top is provided with the screw rod. The utility model discloses a first exhaust hole cooperation air pressure valve of seting up on one side of the upper cover discharges the inside atmospheric pressure that produces of lithium cell, avoids inside along with going on of charge-discharge cycle of lithium cell, and the gas quantity of accumulation is more and more in the battery, and causes the interior pressure of battery to rise, brings the hidden danger for the security of battery, in the time to the discharge of steam, also makes the inside heat of lithium cell reduce simultaneously, plays certain effect to the lithium cell cooling.

Description

Environment-friendly lithium iron phosphate battery

Technical Field

The utility model belongs to the technical field of lithium iron phosphate battery, particularly, in particular to environment-friendly lithium iron phosphate battery.

Background

The lithium iron phosphate battery is a lithium ion battery taking lithium iron phosphate as a positive electrode material, when the lithium iron phosphate battery is charged, part of lithium ions in the lithium iron phosphate are removed and transferred to a negative electrode through an electrolyte, and meanwhile, electrons are released from the positive electrode and reach the negative electrode from an external circuit to maintain the balance of chemical reaction; during discharging, lithium ions are extracted from the negative electrode and reach the positive electrode through the electrolyte, and meanwhile, electrons are released from the negative electrode and reach the positive electrode from an external circuit to provide energy for the outside.

In the normal charging and discharging process of the battery, because the reactions of the generated gases are inevitable along with the continuous destruction and production of the SEI film, the quantity of the gases accumulated in the battery is more and more along with the progress of the charging and discharging cycle, so that the internal pressure of the battery is increased, hidden dangers are brought to the safety of the battery, in order to avoid safety accidents caused by the increase of the air pressure, a safety valve is arranged on an end cover of the general lithium ion power battery, the safety valve is opened to release the pressure when the air pressure exceeds a preset threshold value, and after the battery is used for a long time, an external protective shell of the battery is damaged due to multiple times of power-on discharge, so that the pressure born by the protective shell is reduced, the battery starts to swell and even cannot be used, and some pressure release devices adopt a pressure release valve with smaller pressure for releasing the air in order to prolong the service life of the battery, so that the time of an air outlet in an open state is prolonged, and then the internal leakage of the battery occurs, which causes environmental pollution.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the problem in the correlation technique, the utility model provides an environment-friendly lithium iron phosphate battery to overcome the above-mentioned technical problem that current correlation technique exists.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to an environment-friendly lithium iron phosphate battery, including lithium cell drain pan, upper cover and utmost point ear, lithium cell drain pan top joint has the upper cover, utmost point ear is located upper cover one side, the upper cover upper surface is kept away from first exhaust hole and second exhaust hole have been seted up to one side of utmost point ear, first exhaust hole with second exhaust hole middle part is provided with connect the through-hole, the inside atmospheric pressure valve that is provided with of first exhaust hole, the atmospheric pressure valve top is provided with the screw rod.

Further, first exhaust hole runs through the upper cover, first exhaust hole bottom is provided with the bottom outlet of toper platform structure, first exhaust hole top is provided with the internal thread.

Furthermore, the second exhaust hole is formed in the upper half part of the upper cover, and the bottom of the second exhaust hole is communicated with the first exhaust hole through the through hole.

Further, the pneumatic valve comprises a plugging head and a spring, wherein the plugging head is of a conical table structure, the bottom of the plugging head is matched with the bottom hole, and the spring is located at the top of the plugging head.

Further, the bottom of the screw rod is rotatably connected with a connecting plate, the bottom of the connecting plate is fixedly connected with the spring, a nut is arranged at the top of the screw rod, and the screw rod is meshed with the internal thread.

The utility model discloses following beneficial effect has: when in use, the air pressure valve is put into the first exhaust hole arranged on the upper cover, then the screw rod is rotated through the nut, the screw rod is matched with the internal thread at the top of the first exhaust hole to enable the screw rod to rotate towards the inside of the first exhaust hole, the bottom of the screw rod is rotationally connected with the connecting plate, so that the connecting plate pushes the spring to make the spring push the blocking head at the bottom of the air pressure valve to block the bottom hole at the bottom of the first exhaust hole, when the pressure of the high-pressure gas generated in the lithium battery is higher than the elastic force of the spring, the gas pushes the plugging head upwards to compress the spring, furthermore, the hot gas in the lithium battery can be discharged, when the lithium battery is used for a long time, the bottom shell, the upper cover and the connection part of the lithium battery are damaged due to long-time electrification and discharge, the pressure intensity born by the lithium battery is reduced, the screw rod rotates through the nut to rotate reversely, so that the screw rod rises, and the elasticity of the spring to the blocking head is further reduced. The first exhaust hole formed in one side of the upper cover is matched with the air pressure valve to exhaust air pressure generated in the lithium battery, so that the situation that the internal pressure of the battery rises due to the fact that the quantity of gas accumulated in the battery is more and more along with the progress of charging and discharging circulation in the lithium battery is avoided, potential hazards are brought to the safety of the battery, meanwhile, heat in the lithium battery is reduced while hot air is exhausted, and the effect of cooling the lithium battery is achieved; rotate the screw rod reversal through the nut, make the screw rod rise, and then make the spring reduce to the elasticity that blocks up the head, avoid using the long-time back when the lithium cell, lithium cell drain pan and upper cover, and its junction is impaired because of long-time circular telegram discharges, the pressure that can bear reduces and leads to hidden danger such as lithium cell explosion, and after the long-time back of using of battery, its inside material is dry, the gas quantity that the battery produced at this moment also reduces relatively, and then even the reduction of pressure valve pressure value also can not cause the gas vent to be in open state for a long time, avoided taking place the inside leakage of battery, cause the pollution to the environment.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

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

Fig. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic perspective view of the exhaust section of the present invention;

fig. 3 is a schematic top plan view of the present invention;

fig. 4 is an explosion diagram of the exhaust assembly inside the upper cover of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a lithium battery bottom case; 2. an upper cover; 3. a tab; 4. a first exhaust port; 41. a bottom hole; 42. an internal thread; 5. a second vent hole; 6. a through hole; 7. a pneumatic valve; 71. a plugging head; 72. a spring; 8. a screw; 81. a connecting plate; 82. and a nut.

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. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "top", "middle", "inner", and the like indicate positional or orientational relationships and are merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to fig. 1-4, the utility model relates to an environment-friendly lithium iron phosphate battery, including lithium battery drain pan 1, upper cover 2 and

utmost point ear

3, 1 top joint of lithium battery drain pan has upper cover 2, and utmost point ear 3 is located 2 one sides of upper cover, and first exhaust hole 4 and second exhaust hole 5 have been seted up to one side that utmost point ear 3 was kept away from to 2 upper surfaces of upper cover, and first exhaust hole 4 is provided with connect the via hole 6 with second exhaust hole 5 middle part, and first exhaust hole 4 is inside to be provided with pneumatic valve 7, and pneumatic valve 7 top is provided with screw rod 8.

In one embodiment, as for the first vent hole 4, the first vent hole 4 penetrates through the upper cover 2, a bottom hole 41 with a conical platform structure is arranged at the bottom of the first vent hole 4, an internal thread 42 is arranged at the top of the first vent hole 4, and hot air generated inside the lithium battery is exhausted by using the first vent hole 4, wherein the upper cover 2 and the bottom shell 1 of the lithium battery are external protective shells of the lithium battery.

In one embodiment, for the second vent hole 5, the second vent hole 5 is opened in the upper half of the upper lid 2, the bottom of the second vent hole 5 is communicated with the first vent hole 4 through the through hole 6, and the second vent hole 5 is communicated with the first vent hole 4 through the through hole 6. due to the screw 8 arranged at the top of the air pressure valve 7 in the first vent hole 4, the air exhausting effect at the top of the first vent hole 4 is not good, so that the hot air in the battery case is guided to the second vent hole 5 through the through hole 6 and exhausted from the second vent hole 5.

In one embodiment, for the above air pressure valve 7, the air pressure valve 7 includes a plugging head 71 and a spring 72, which are in a conical table structure, the bottom of the plugging head 71 is matched with the bottom hole 41, the spring 72 is located at the top of the plugging head 71, the plugging head 71 at the bottom of the air pressure valve 7 is matched with the bottom hole 41 at the bottom of the first vent hole 4, and under the action of the spring 72, when a large amount of hot air is not generated inside the lithium battery, the spring abuts against the plugging head 71, so that the bottom hole 41 is plugged, external air is prevented from entering the lithium battery, and the service life of the lithium battery is shortened.

In one embodiment, as for the above screw 8, a connecting plate 81 is rotatably connected to the bottom of the screw 8, the bottom of the connecting plate 81 is fixedly connected to the spring 72, a nut 82 is disposed on the top of the screw 8, the screw 8 is engaged with the internal thread 42, and the degree of compression of the spring 72 between the screw 8 and the air pressure valve 7, and thus the pressure applied to the air pressure valve 7, can be adjusted by the screw 8 disposed on the top of the air pressure valve 7.

In summary, according to the above technical solution of the present invention, when in use, the air pressure valve 7 is placed inside the first vent hole 4 formed in the upper cover 2, then the screw 8 is rotated by the nut 82, the screw 8 is matched with the internal thread 42 at the top of the first vent hole 4, the screw 8 is rotated towards the inside of the first vent hole 4, the bottom of the screw 8 is rotatably connected with the connecting plate 81, and further the connecting plate 81 pushes the spring 72, so that the spring 72 pushes the plugging head 71 at the bottom of the air pressure valve 7 to plug the bottom hole 41 at the bottom of the first vent hole 4, when the pressure of the high pressure gas generated inside the lithium battery is higher than the elastic force of the spring 72, the gas pushes the plugging head 71 upwards to compress the spring 72, and further the hot gas inside the lithium battery can be discharged, after the lithium battery is used for a long time, the lithium battery bottom case 1 and the upper cover 2, and the connection part thereof are damaged due to long-time power-on discharge, the pressure that can be borne is reduced, the screw 8 is rotated by the nut 82 to rotate reversely, the screw 8 is lifted, and the elastic force of the spring 72 on the plugging head 71 is reduced.

Through above-mentioned technical scheme, 1, discharge the atmospheric pressure that produces inside the lithium cell through the cooperation air pressure valve of first exhaust hole of seting up on one side of the upper cover, avoid inside along with going on of charge-discharge cycle of lithium cell, the gas quantity of accumulation is more and more in the battery, and causes the pressure to rise in the battery, brings the hidden danger for the security of battery, in the time to the discharge of steam, also makes the inside heat of lithium cell reduce simultaneously, plays certain effect to the lithium cell cooling.

2. Rotate the screw rod reversal through the nut, make the screw rod rise, and then make the spring reduce to the elasticity that blocks up the head, avoid using the long-time back when the lithium cell, lithium cell drain pan and upper cover, and its junction is impaired because of long-time circular telegram discharges, the pressure that can bear reduces and leads to hidden danger such as lithium cell explosion, and after the long-time back of using of battery, its inside material is dry, the gas quantity that the battery produced at this moment also reduces relatively, and then even the reduction of pressure valve pressure value also can not cause the gas vent to be in open state for a long time, avoided taking place the inside leakage of battery, cause the pollution to the environment.

In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended only to help illustrate the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides an environment-friendly lithium iron phosphate battery, includes lithium cell drain pan (1), upper cover (2) and utmost point ear (3), lithium cell drain pan (1) top joint has upper cover (2), utmost point ear (3) are located upper cover (2) one side, its characterized in that: upper cover (2) upper surface is kept away from first exhaust hole (4) and second exhaust hole (5) have been seted up to one side of utmost point ear (3), first exhaust hole (4) with second exhaust hole (5) middle part is provided with connect the via hole (6), first exhaust hole (4) inside is provided with pneumatic valve (7), pneumatic valve (7) top is provided with screw rod (8).

2. The environment-friendly lithium iron phosphate battery according to claim 1, wherein the first vent hole (4) penetrates through the upper cover (2), a bottom hole (41) with a conical platform structure is formed at the bottom of the first vent hole (4), and an internal thread (42) is formed at the top of the first vent hole (4).

3. The environment-friendly lithium iron phosphate battery as claimed in claim 1, wherein the second vent hole (5) is formed in the upper half portion of the upper cover (2), and the bottom of the second vent hole (5) is communicated with the first vent hole (4) through the through hole (6).

4. The environment-friendly lithium iron phosphate battery according to claim 2, wherein the pneumatic valve (7) comprises a plugging head (71) with a conical table structure and a spring (72), the bottom of the plugging head (71) is matched with the bottom hole (41), and the spring (72) is positioned at the top of the plugging head (71).

5. The environment-friendly lithium iron phosphate battery as claimed in claim 4, wherein a connecting plate (81) is rotatably connected to the bottom of the screw (8), the bottom of the connecting plate (81) is fixedly connected with the spring (72), a nut (82) is arranged at the top of the screw (8), and the screw (8) is meshed with the internal thread (42).