CN210403811U

CN210403811U - Multilayer explosion-proof lithium manganese battery

Info

Publication number: CN210403811U
Application number: CN201921188477.1U
Authority: CN
Inventors: 何伟中; 徐峰
Original assignee: Changzhou Real Power Technology Co Ltd
Current assignee: Changzhou Real Power Technology Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-24
Anticipated expiration: 2029-07-25

Abstract

The utility model relates to the technical field of batteries, in particular to a multilayer explosion-proof lithium manganese battery, which solves the defects of the prior art that the lithium manganese battery has a thin shell and is easy to explode when being greatly impacted by the outside, or the temperature that battery work produced can't give off, and the inside heat gathering of battery also leads to the battery to explode because of the high temperature easily, including battery body and shell, battery body installs in the inside of inner shell, and the outside welding of inner shell has the shell, and the top cap is installed to the inside gomphosis of opening on shell upper portion, and the opening internal weld of shell bottom has the bottom plate, and battery body's outside is pasted and is had first graphite radiating film, the utility model discloses, the middle protection architecture that has the battery body of protection cavity of shell and inner shell welded comes battery body with battery body and external isolation, reduces the battery and receives external extrusion, protects battery body, and the battery receives external impact or extrusion and the emergence of the explosion condition.

Description

Multilayer explosion-proof lithium manganese battery

Technical Field

The utility model relates to the technical field of batteries, especially, relate to an explosion-proof type lithium manganese battery of multilayer.

Background

Lithium manganese battery, as one of the batteries, is applied due to its small volume and large capacityIn many fields. As a commonly used cylindrical wound electrode Li/MnO₂The battery (power type) has a structure that a lithium negative electrode, a lithium positive electrode and a diaphragm arranged between two electrodes are overlaid and then are wound into a film-shaped structure, and the positive and negative electrode plates and the diaphragm are wound into a core body; the upper end of the core body is provided with an upper insulation sheet which is then sleeved into the inner shell, the bottom surface of the upper end of the inner shell is provided with a plug with a hole which passes through the upper insulation sheet, the lower end surface of the inner shell is not provided with the plug, and the upper insulation sheet realizes the insulation between the anode and the cathode of the core body and the insulation between the core body and the inner shell; after the core body is arranged, the lower end head of the inner shell serves as a plug by the lower insulation sheet, and then the inner shell is arranged in the outer shell; the lower insulation sheet isolates the contact between the lower end head of the inner shell and the outer shell; the outermost end of the wound 'film' is a positive plate, a positive lead is led out from the outermost positive plate to the side surface of the 'film', and the positive lead is connected with the inner shell and the outer shell; a cathode lead is led out from the cathode plate in the center and passes through the upper insulation sheet and a lead hole of the inner shell; the outer shell is higher than the inner shell, the height difference generated by the inner shell being arranged in the outer shell passes through the support ring, and the negative lead is connected with the negative cover through the support ring. The lithium manganese battery has a thin shell, and is easy to explode when being subjected to external large impact, or the temperature generated by the battery during working cannot be dissipated, and the battery is easy to explode due to overhigh temperature caused by the accumulation of heat in the battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving and having lithium manganese battery case among the prior art thinner, easy explosion when receiving the great impact in the external world, perhaps the temperature that battery work produced can't distribute, and the inside heat gathering of battery also leads to the battery because of the shortcoming of high temperature explosion easily, and the explosion-proof type lithium manganese battery of multilayer that provides.

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

the utility model provides an explosion-proof type lithium manganese battery of multilayer, includes battery body and shell, battery body installs the inside at the inner shell, the outside welding of inner shell has the shell, the top cap is installed to the inside gomphosis of opening on shell upper portion, the inside welding of opening of shell bottom has the bottom plate, battery body's outside paste has first graphite heat dissipation membrane, battery body includes electric core, second graphite heat dissipation membrane, aluminum hull, upper cover plate and apron down, the inside at the aluminum hull is installed to electric core, electric core outside paste has second graphite heat dissipation membrane, the internal surface of glue laminating aluminum hull is passed through to the surface of second graphite heat dissipation membrane, the upper cover plate is installed to the inside gomphosis of opening at aluminum hull top, the apron is installed down to the inside gomphosis of opening of aluminum hull bottom.

Preferably, the battery body further comprises an upper graphite sheet and a lower graphite sheet, the upper graphite sheet is attached to the bottom surface of the upper cover plate, the lower graphite sheet is attached to the top surface of the lower cover plate, the bottom surface of the upper graphite sheet is closely attached to the top of the battery core, and the top surface of the lower graphite sheet is closely attached to the bottom of the battery core.

Preferably, the outer peripheral surface of the outer shell is circumferentially provided with a groove, the first graphite heat dissipation film penetrates through openings formed in one sides of the outer shell and the inner shell, and the part of the first graphite heat dissipation film outside the outer shell is arranged inside the groove.

Preferably, a protective cavity is arranged between the outer shell and the inner shell, and the protective cavity is annular.

Preferably, the middle part of the outer shell is stamped with an annular bulge, and the annular bulge is along the circumferential direction of the outer shell.

Preferably, the top cover comprises a substrate and a contact piece, and the contact piece is welded on one side of the middle part of the bottom surface of the substrate.

Preferably, the mounting groove has been seted up at the middle part on upper cover plate upper portion, the internally mounted of mounting groove has the memory sheetmetal, memory sheetmetal one end is fixed and bottom surface in close contact with mounting groove bottom surface, one side and the contact in close contact with of memory sheetmetal top surface.

The utility model has the advantages that: the battery body is isolated from the outside by the protection structure of the battery body with the protection cavity in the middle, which is formed by welding the outer shell and the inner shell, so that the extrusion of the battery from the outside is reduced, the battery body is protected, and the battery is exploded by the external impact or extrusion; the second graphite heat dissipation film, the upper graphite sheet and the lower graphite sheet transfer heat generated by the battery core, and then the first graphite heat dissipation film transfers the heat to the surface of the shell for heat dissipation, so that the situation that the heat in the battery core is gathered and cannot be released to cause explosion is avoided, and the use safety of the battery is improved; the memory metal sheet in the mounting groove at the upper part of the upper cover plate at high temperature contracts towards the fixed end to separate the memory metal sheet from the contact sheet, and the circuit is broken to prevent the battery cell from working, so that the explosion caused by overheating of the battery cell is avoided.

Drawings

Fig. 1 is a schematic cross-sectional view of a multilayer explosion-proof lithium manganese dioxide battery according to the present invention;

fig. 2 is a schematic diagram of a battery body structure of a multilayer explosion-proof lithium manganese battery provided by the present invention;

fig. 3 is a schematic view illustrating the connection between the upper cover plate and the top cover of the multi-layer explosion-proof lithium manganese dioxide battery of the present invention.

In the figure: 1 battery body, 101 electric core, 102 second graphite heat dissipation membrane, 103 aluminum hull,

upper cover plate

104, 105 lower cover plate, 106 upper graphite flake, 107 lower graphite flake, 12 top cap, 21 base plate, 22 contact, 3 bottom plate, 4 outer shell, 5 inner shell, 6 protection cavity, 7 groove, 8 annular protrusion, 9 first graphite heat dissipation membrane, 10 opening, 11 mounting groove, 12 memory metal sheet.

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 multilayer explosion-proof lithium manganese battery comprises a battery body 1 and an outer shell 4, wherein the battery body 1 is installed inside an inner shell 5, the outer shell 4 is welded outside the inner shell 5, a top cover 2 is installed in an opening embedded manner on the upper portion of the outer shell 4, a bottom plate 3 is welded inside an opening on the bottom portion of the outer shell 4, a first graphite heat dissipation film 9 is pasted outside the battery body 1, the battery body 1 comprises a battery core 101, a second graphite heat dissipation film 102, an aluminum shell 103, an upper cover plate 104 and a lower cover plate 105, the battery core 101 is installed inside the aluminum shell 103, the second graphite heat dissipation film 102 is pasted outside the battery core 101, the outer surface of the second graphite heat dissipation film 102 is pasted to the inner surface of the aluminum shell 103 through adhesive, the upper cover plate 104 is installed in the opening embedded manner on the top portion of the aluminum shell 103, the lower cover plate 105, Go up graphite flake 106 and graphite flake 107 down and come out the heat transfer that electricity core 101 produced, by the surface heat dissipation of first graphite heat dissipation film 9 with heat transfer to shell 4 again, avoid the inside heat of electricity core to gather and can't release the condition emergence of exploding, improve the security of battery use.

Further, the battery body 1 further includes an upper graphite sheet 106 and a lower graphite sheet 107, the upper graphite sheet 106 is attached to the bottom surface of the upper cover plate 104, the lower graphite sheet 107 is attached to the top surface of the lower cover plate 105, the bottom surface of the upper graphite sheet 106 is closely attached to the top of the battery core 101, and the top surface of the lower graphite sheet 107 is closely attached to the bottom of the battery core 101.

Furthermore, the outer peripheral surface of the outer shell 4 is circumferentially provided with a groove 7, the first graphite heat dissipation film 9 penetrates through an opening 10 formed in one side of the outer shell 4 and the inner shell 5, and the part of the first graphite heat dissipation film 9 outside the outer shell 4 is arranged inside the groove 7.

Furthermore, a protective cavity 6 is arranged between the outer shell 4 and the inner shell 5, the protective cavity 6 is annular, the battery body 1 is isolated from the outside by a protective structure of the battery body 1 with the protective cavity 6 in the middle formed by welding the outer shell 4 and the inner shell 5, the extrusion of the battery from the outside is reduced, the battery body 1 is protected, and the battery is impacted or extruded from the outside to cause explosion.

Further, the middle part of the outer shell 4 is stamped with an annular bulge 8, the annular bulge 8 is along the circumferential direction of the outer shell 4, and the annular bulge 8 enhances the capacity of the outer shell 4 to be impacted.

Further, the top cover 2 comprises a base plate 21 and a contact piece 22, and the contact piece 22 is welded on one side of the middle part of the bottom surface of the base plate 21.

Further, mounting groove 11 has been seted up at the middle part on upper cover plate 104 upper portion, the internally mounted of mounting groove 11 has memory metal piece 12, memory metal piece 12 one end is fixed and bottom surface in close contact with mounting groove 11 bottom surface, one side and the contact 22 in close contact with of memory metal piece 12 top surface, memory metal piece 12 in upper cover plate 104 upper portion mounting groove 11 contracts to the stiff end in the high temperature and makes and break away from between memory metal piece 12 and the contact 22, the circuit opens circuit and makes electric core 101 no longer work, avoid taking place because of the overheated condition of explosion of electric core 101.

In the embodiment, the battery body 1 is isolated from the outside by the protection structure of the battery body 1 with the protective cavity 6 in the middle, which is formed by welding the outer shell 4 and the inner shell 5, so that the extrusion of the battery from the outside is reduced, the battery body 1 is protected, the battery is exploded due to the external impact or extrusion, and the impact capacity of the outer shell 4 is enhanced by the annular bulge 8 punched in the middle of the outer shell 4; the second graphite heat dissipation film 102, the upper graphite sheet 106 and the lower graphite sheet 107 in the aluminum shell 103 of the battery body 1 transfer heat generated by the battery core 101, and then the first graphite heat dissipation film 9 transfers the heat to the surface of the shell 4 for heat dissipation, so that the situation that the heat in the battery core is gathered and cannot be released to cause explosion is avoided, and the use safety of the battery is improved; the heat when electric core 101 overheats is transferred to upper cover plate 104 in, and memory metal piece 12 in upper portion mounting groove 11 of upper cover plate 104 contracts to the stiff end in high temperature makes and breaks away from between memory metal piece 12 and contact 22, and the circuit opens circuit and makes electric core 101 no longer work, avoids the condition emergence of exploding because of electric core 101 is overheated.

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. The utility model provides a multilayer explosion-proof type lithium manganese battery, includes battery body (1) and shell (4), its characterized in that, the inside at inner shell (5) is installed in battery body (1), the outside welding of inner shell (5) has shell (4), top cap (2) are installed to the inside gomphosis of opening on shell (4) upper portion, the inside welding of opening of shell (4) bottom has bottom plate (3), the outside of battery body (1) is pasted and is had first graphite heat dissipation membrane (9), battery body (1) includes electric core (101), second graphite heat dissipation membrane (102), aluminum hull (103), upper cover plate (104) and lower cover plate (105), the inside at aluminum hull (103) is installed to electric core (101), electric core (101) outside is pasted and is had second graphite heat dissipation membrane (102), the surface of second graphite heat dissipation membrane (102) passes through the internal surface of viscose laminating aluminum hull (103), an upper cover plate (104) is installed in the opening at the top of the aluminum shell (103) in an embedded mode, and a lower cover plate (105) is installed in the opening at the bottom of the aluminum shell (103) in an embedded mode.

2. The multilayer explosion-proof lithium-manganese battery according to claim 1, wherein the battery body (1) further comprises an upper graphite sheet (106) and a lower graphite sheet (107), the upper graphite sheet (106) is attached to the bottom surface of the upper cover plate (104), the lower graphite sheet (107) is attached to the top surface of the lower cover plate (105), the bottom surface of the upper graphite sheet (106) is closely attached to the top of the battery cell (101), and the top surface of the lower graphite sheet (107) is closely attached to the bottom of the battery cell (101).

3. The multilayer explosion-proof lithium manganese battery according to claim 1, wherein the outer peripheral surface of the outer casing (4) is circumferentially provided with a groove (7), the first graphite heat dissipation film (9) passes through an opening (10) formed in one side of the outer casing (4) and the inner casing (5), and the part of the first graphite heat dissipation film (9) outside the outer casing (4) is arranged inside the groove (7).

4. The multilayer explosion-proof lithium manganese battery according to claim 1, characterized in that a protective cavity (6) is arranged between the outer casing (4) and the inner casing (5), and the protective cavity (6) is annular.

5. The lithium manganese battery of claim 1, wherein the housing (4) is punched with an annular protrusion (8) at the middle, and the annular protrusion (8) is along the circumference of the housing (4).

6. The multilayer explosion-proof lithium manganese battery as claimed in claim 1, wherein the top cover (2) comprises a substrate (21) and a contact piece (22), and the contact piece (22) is welded on one side of the middle of the bottom surface of the substrate (21).

7. The multi-layer explosion-proof lithium manganese battery as claimed in claim 1, wherein the upper cover plate (104) has a mounting groove (11) formed in the middle of the upper portion thereof, a memory metal plate (12) is mounted inside the mounting groove (11), one end of the memory metal plate (12) is fixed and the bottom surface of the memory metal plate is in close contact with the bottom surface of the mounting groove (11), and one side of the top surface of the memory metal plate (12) is in close contact with the contact plate (22).