CN211605330U - Explosion-proof lithium ion battery - Google Patents
Explosion-proof lithium ion battery Download PDFInfo
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- CN211605330U CN211605330U CN202020245223.5U CN202020245223U CN211605330U CN 211605330 U CN211605330 U CN 211605330U CN 202020245223 U CN202020245223 U CN 202020245223U CN 211605330 U CN211605330 U CN 211605330U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses an explosion-proof lithium ion battery, include: the device comprises a battery shell, a battery inner core, a one-way tightening sleeve, a liquefaction layer, a battery pole piece, a pressure relief plate, a wall breaking piece, a gasket, a cover plate, a fixing rod, a limiting buckle, a protrusion group, a fixing tooth, a plurality of friction pieces and the like; the utility model arranges the liquefaction layer between the one-way tightening sleeves, so that the one-way tightening sleeves can tighten the battery inner core only when the temperature in the battery is raised due to the short circuit of the battery, thereby fixing the battery inner core, preventing the battery inner core from moving upwards during pressure relief to block the pressure relief hole, and leading the insufficient pressure relief of the battery to generate delayed explosion; when the battery is normally used, due to the existence of the liquefaction layer, the one-way tightening sleeve has a certain interval from the battery inner core, and the normal use of the battery inner core cannot be influenced.
Description
Technical Field
The utility model relates to a battery structure field. More specifically, the utility model relates to an explosion-proof lithium ion battery.
Background
The lithium ion battery is a battery with the widest popularity at present, and realizes charge and discharge mainly by the back-and-forth movement of lithium ions between a positive electrode and a negative electrode;
although the lithium ion has high energy density and long service life, the lithium ion also has certain danger, and during the charging and discharging processes of the lithium ion battery, a large amount of gas is generated by electrolyte solution in a battery core, so that the internal pressure of the lithium ion battery is too high, and the lithium ion battery is easy to explode when the pressure is too high to bear the limit of a shell, has certain danger, and is easy to cause property loss;
the conventional pressure relief of a lithium ion explosion-proof battery is generally realized by arranging a needle-shaped structure in the battery, when the pressure in the battery is too high, an upper membrane of the battery is pushed upwards through the needle-shaped structure to achieve the pressure relief explosion-proof effect, and a battery core of the battery is easy to move upwards during pressure relief, so that a pressure relief hole is easy to block, and the battery core is easy to fly out when the air pressure is too high to cause more casualties.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model also aims at providing an explosion-proof lithium ion battery, which has simple structure and low production cost, and a liquefaction layer is arranged between the one-way tightening sleeves, so that the battery inner core can be tightened only when the temperature in the battery is raised due to the short circuit of the battery, thereby fixing the battery inner core, preventing the battery inner core from moving upwards during pressure relief to block a pressure relief hole, and leading the pressure relief of the battery to be insufficient to generate delayed explosion; when the battery is normally used, due to the existence of the liquefaction layer, the one-way tightening sleeve has a certain interval from the battery inner core, and the normal use of the battery inner core is not influenced.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an explosion-proof lithium ion battery including:
a battery case having an upper end opened; a vertical battery inner core is arranged in the center of the interior of the battery shell, and a one-way tightening sleeve is sleeved on the periphery of the battery inner core; the one-way tightening sleeve extends spirally along the radial direction of the battery shell, a liquefaction layer is clamped in the one-way tightening sleeve, and the liquefaction temperature range of the liquefaction layer is 100-180 ℃; a battery pole piece is wound on the periphery of the one-way tightening sleeve; the battery shell is filled with electrolyte; a pressure relief plate covers an opening at the upper end of the battery shell, a wall breaking piece is vertically embedded in the pressure relief plate and is abutted against the pressure relief plate, and a gasket and a cover plate are arranged at the upper part of the pressure relief plate;
the unidirectional tightening sleeve is a cylinder formed by curling a square plate with toughness; a fixing rod is arranged on the inner edge of the one-way tightening sleeve along the width direction, the fixing rod is vertical and fixedly connected with the bottom end of the battery shell, and the side wall of the fixing rod is abutted against the battery inner core; the outer edge of the one-way tightening sleeve is tightly attached to the outer wall of the one-way tightening sleeve, the upper end and the lower end of the outer edge of the one-way tightening sleeve are respectively provided with a limit buckle clamped with the outer wall of the one-way tightening sleeve, the cross section of each limit buckle is in a hook shape, the edge of the inner wall of the one-way tightening sleeve buckled with the limit buckle is provided with a clamping groove matched with the hook of the limit buckle, and the hook-shaped structure of each limit buckle is movably buckled in the clamping groove so that the outer edge of the one-way tightening sleeve is tightly attached to the outer wall of the one-way tightening sleeve;
the outer wall of the one-way tightening sleeve tightly attached to the outer edge of the one-way tightening sleeve is provided with at least two rows of protruding groups with saw-toothed cross sections, the protruding groups are arranged along the extending direction of the one-way tightening sleeve and the length direction of the one-way tightening sleeve are the same, the outer edge is tightly attached to the inner side face of the outer wall of the one-way tightening sleeve, the fixing teeth matched with the protruding groups are arranged on the inner side face of the outer wall of the one-way tightening sleeve, each fixing tooth corresponds to one row of protruding groups, the outer edge of the one-way tightening sleeve is provided with a plurality of.
Preferably, the cover plate is provided with a pressure relief hole, and the pressure relief hole is covered with an explosion-proof film in a sealing manner.
Preferably, the thickness of the explosion-proof film is 2.5-3.0 mm, and the explosion-proof film is made of any one of copper foil, aluminum foil, PE and PPO.
Preferably, the wall breaking piece is a needle-shaped structure with a hollow interior, and the wall breaking piece faces the rupture membrane.
Preferably, the main material of the liquefaction layer is PE, HDPE or PMMA.
Preferably, two fixed rods are arranged on the one-way tightening sleeve, and the one-way tightening sleeve between the two fixed rods forms a half-bag structure.
The utility model discloses at least, include following beneficial effect:
the one-way tightening sleeve is arranged in the battery, the one-way tightening sleeve is fixed with the battery shell through the fixing rod, and the liquefaction layer is arranged between the one-way tightening sleeves, so that the battery inner core can be tightly hooped only when the battery is in short circuit and the temperature in the battery rises, and the battery inner core is fixed, thereby preventing the battery inner core from moving upwards during pressure relief to block a pressure relief hole, and preventing the delayed explosion caused by insufficient pressure relief of the battery; when the battery is normally used, due to the existence of the liquefaction layer, the one-way tightening sleeve has a certain interval from the battery inner core, and the normal use of the battery inner core is not influenced;
the wall breaking piece is arranged on the upper portion of the battery, so that the battery element is initiatively punctured before the short circuit of the lithium battery explodes, the battery is decompressed, high-temperature and high-pressure substances in the battery flow out through the decompression hole, and further uncontrollable disasters are prevented.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of an explosion-proof lithium ion battery according to one embodiment of the present invention;
fig. 2 is a horizontal cross-sectional view of an explosion-proof lithium ion battery according to one embodiment of the present invention;
fig. 3 is a schematic view of a combined structure of the one-way tightening sleeve, the liquefaction layer and the battery inner core according to one of the technical solutions of the present invention;
fig. 4 is a schematic view of the structure of the limit buckle according to one of the technical solutions of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1-4, the utility model provides an explosion-proof lithium ion battery, include:
a battery case 1 having a cylindrical shape and an open upper end; a vertical battery inner core 4 is coaxially arranged in the battery shell 1 to play a role of supporting a battery to protect a battery pole piece 5, and a one-way tightening sleeve 2 is sleeved on the periphery of the battery inner core 4; the one-way tightening sleeve 2 extends spirally along the radial direction of the battery shell 1, a liquefaction layer 3 is clamped in the one-way tightening sleeve 2, the liquefaction layer 3 plays a role of supporting the one-way tightening sleeve 2, so that an interval exists between the one-way tightening sleeve 2 and the battery inner core 4, the liquefaction temperature range of the liquefaction layer 3 is 100-180 ℃, the main material of the liquefaction layer 3 is PE, HDPE or PMMA, when the temperature in the battery is increased in a short-circuit state and reaches the liquefaction point of the liquefaction layer 3, the liquefaction layer 3 is melted, the high pressure in the battery enables the one-way tightening sleeve 2 to tighten, the battery inner core 4 is hooped, and the battery inner core 4 is fixed;
the unidirectional tightening sleeve 2 is a cylindrical structure formed by curling a square plate body with toughness along the length direction of the square plate body; the width of the one-way tightening sleeve 2 is 41-1.5 mm higher than that of the battery inner core;
a fixing rod 204 is arranged on the inner edge of the one-way tightening sleeve 2 along the width direction, the fixing rod 204 is vertical, the lower end part of the fixing rod 204 is fixedly connected with the bottom surface in the battery shell 1, and the side wall of the fixing rod 204 is abutted against the battery inner core 4;
the outer edge of the one-way tightening sleeve 2 is tightly attached to the outer wall of the one-way tightening sleeve 2, the upper end and the lower end of the outer edge of the one-way tightening sleeve 2 are respectively provided with a limit buckle 205 clamped with the inner wall of the one-way tightening sleeve 2, the cross section of each limit buckle 205 is in a hook shape, the edge of the inner wall of the one-way tightening sleeve 2, which is buckled with the limit buckle 205, is provided with a T-shaped clamping groove 206 matched with the hook of the limit buckle 205, the hook-shaped structure of the limit buckle 205 is movably buckled in the clamping groove 206, and the limit buckle 205 can move along the length direction of the T-shaped clamping groove 206, so that the outer edge of the one-way tightening sleeve 2 is tightly attached to the outer wall of the one-way;
at least two rows of protrusion groups 201 with sawtooth-shaped cross sections are arranged on the outer wall of the one-way tightening sleeve 2 tightly attached to the outer edge of the one-way tightening sleeve 2, the cross sections of the sawteeth are right-angled triangles, and the inclined directions of the inclined sides of the protrusions of the sawtooth-shaped protrusion groups 201 are the same; the extension direction of the one-way tightening sleeve 2 of the protrusion group 201 is the same as the length direction of the one-way tightening sleeve 2, the inner side surface of the outer edge, which is tightly attached to the outer wall of the one-way tightening sleeve 2, is provided with fixed teeth 202 matched with the protrusions of the protrusion group 201, the cross section of the fixed teeth 202 is also in a right triangle shape, the inclination direction of the inclined side of the right triangle of the fixed teeth 202 is opposite to the inclination direction of the inclined side of the protrusions of the protrusion group 201, and each fixed tooth 202 corresponds to one row of protrusion groups 201, so that the one-way tightening sleeve 2 realizes the effects of one-way tightening and reverse locking; the inner wall of the one-way tightening sleeve 2 is provided with a plurality of friction pieces 203, the friction pieces 203 are of a circular protruding structure, and the friction force between the one-way tightening sleeve 2 and the liquefaction layer 3 and between the one-way tightening sleeve and the battery inner core 4 is increased.
A battery pole piece 5 is wound on the periphery of the one-way tightening sleeve 2; the battery shell 1 is filled with electrolyte, an upper insulating layer 11 and a lower insulating layer 11 are further arranged in the battery shell 1 to isolate the electrolyte, and the lower insulating layer 11 is attached to the lower bottom surface in the battery shell 1;
a pressure relief plate 6 is covered at an opening at the upper end of the battery shell 1, a wall breaking piece 602 is vertically embedded in the pressure relief plate 6, the wall breaking piece 602 is abutted against the pressure relief plate 6, and an upper insulating layer 7, a cover plate 8, a gasket 10 and a positive terminal 9 are sequentially covered on the upper part of the pressure relief plate 6;
in the technical scheme, specifically, during the production of the lithium battery, the liquefaction layer 3 and the one-way tightening sleeve 2 are firstly overlapped, the overlapped one-way tightening sleeve 2 is coaxially wound outside a battery cell, the one-way tightening sleeve 2 is tightened, so that the battery cell, the liquefaction layer 3 and the one-way tightening sleeve 2 do not move relatively, and then the fixing rod 204 of the one-way tightening sleeve 2 is fixed at the bottom in the battery shell 1 in a welding mode and the like; the specific use condition is that when the battery is in a short circuit, the battery generates heat, the internal pressure of the battery is increased, the liquefaction layer 3 is liquefied, a space is generated between the one-way tightening sleeve 2 and the battery inner core 4, the one-way tightening sleeve 2 is tightened by internal pressure, the battery inner core 4 is hooped by the one-way tightening sleeve 2, meanwhile, the internal pressure in the battery enables the wall breaking piece 602 embedded in the pressure relief plate 6 to move upwards to pierce the insulating layer and the cover plate 8, so that the pressure in the battery is reduced, gas is transferred to the outside of the battery to achieve the pressure relief effect, meanwhile, the battery inner core 4 is not easy to fly out of the battery to cause secondary damage, the technical scheme is adopted, the structure is simple, the fixation of the battery inner core 4 can be realized only by covering the liquefaction layer 3 and the one-way tightening sleeve 2 outside the battery inner core 4, the use of the battery inner core 4 is not influenced, the production cost is low, the life safety of the user is guaranteed.
In another kind of technical scheme, be equipped with pressure release hole 801 on the apron 8, the sealed rupture membrane 802 that covers is equipped with on the pressure release hole 801, rupture membrane 802 thickness is 2.5 ~ 3.0mm, for any kind of material in copper foil, aluminium foil, PE and the PPO, adopts this technical scheme, can further improve the efficiency that the broken wall spare 602 impales apron 8, and the pressure release in advance prevents that the pressure release from producing the explosion in untimely.
In another technical scheme, the wall breaking piece 602 is a needle-shaped structure with a hollow interior, and the wall breaking piece 602 faces the rupture disk 802, so that the pressure relief function can be guided, and the cover plate 8 or the rupture disk 802 can be more easily ruptured.
In another technical scheme, two fixing rods 204 are arranged on the one-way tightening sleeve 2, the one-way tightening sleeve 2 between the two fixing rods 204 forms a half-pack structure, the battery inner core 4 is clamped in the formed half-pack structure, the battery inner core 4 is further fixed, and the fixing effect of the battery inner core 4 is improved.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the explosion-proof lithium ion battery of the present invention will be apparent to those skilled in the art.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (6)
1. Explosion-proof lithium ion battery, its characterized in that includes:
a battery case having an upper end opened; a vertical battery inner core is arranged in the center of the interior of the battery shell, and a one-way tightening sleeve is sleeved on the periphery of the battery inner core; the one-way tightening sleeve extends spirally along the radial direction of the battery shell, a liquefaction layer is clamped in the one-way tightening sleeve, and the liquefaction temperature range of the liquefaction layer is 100-180 ℃; a battery pole piece is wound on the periphery of the one-way tightening sleeve; the battery shell is filled with electrolyte; a pressure relief plate covers an opening at the upper end of the battery shell, a wall breaking piece is vertically embedded in the pressure relief plate and is abutted against the pressure relief plate, and a gasket and a cover plate are arranged at the upper part of the pressure relief plate;
the unidirectional tightening sleeve is a cylinder formed by curling a square plate with toughness; a fixing rod is arranged on the inner edge of the one-way tightening sleeve along the width direction, the fixing rod is vertical and fixedly connected with the bottom end of the battery shell, and the side wall of the fixing rod is abutted against the battery inner core; the outer edge of the one-way tightening sleeve is tightly attached to the outer wall of the one-way tightening sleeve, the upper end and the lower end of the outer edge of the one-way tightening sleeve are respectively provided with a limit buckle clamped with the outer wall of the one-way tightening sleeve, the cross section of each limit buckle is in a hook shape, the edge of the inner wall of the one-way tightening sleeve buckled with the limit buckle is provided with a clamping groove matched with the hook of the limit buckle, and the hook-shaped structure of each limit buckle is movably buckled in the clamping groove so that the outer edge of the one-way tightening sleeve is tightly attached to the outer wall of the one-way tightening sleeve;
the outer wall of the one-way tightening sleeve tightly attached to the outer edge of the one-way tightening sleeve is provided with at least two rows of protruding groups with saw-toothed cross sections, the protruding groups are arranged along the extending direction of the one-way tightening sleeve and the length direction of the one-way tightening sleeve are the same, the outer edge is tightly attached to the inner side face of the outer wall of the one-way tightening sleeve, the fixing teeth matched with the protruding groups are arranged on the inner side face of the outer wall of the one-way tightening sleeve, each fixing tooth corresponds to one row of protruding groups, the outer edge of the one-way tightening sleeve is provided with a plurality of.
2. The explosion-proof lithium ion battery of claim 1, wherein the cover plate is provided with a pressure relief hole, and an explosion-proof film is hermetically covered on the pressure relief hole.
3. The explosion-proof lithium ion battery of claim 2, wherein the thickness of the explosion-proof film is 2.5-3.0 mm, and the explosion-proof film is made of any one of copper foil, aluminum foil, PE and PPO.
4. The explosion-proof lithium ion battery of claim 2 wherein the wall breaking member is a needle-like structure with a hollow interior, and the wall breaking member faces the explosion-proof membrane.
5. The explosion-proof lithium ion battery of claim 1 wherein the liquefaction layer primary material is PE, HDPE or PMMA.
6. The explosion-proof lithium ion battery of claim 1 wherein there are two fixing rods on the unidirectional tightening sleeve, and the unidirectional tightening sleeve between the two fixing rods forms a half-pack structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020245223.5U CN211605330U (en) | 2020-03-03 | 2020-03-03 | Explosion-proof lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020245223.5U CN211605330U (en) | 2020-03-03 | 2020-03-03 | Explosion-proof lithium ion battery |
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| Publication Number | Publication Date |
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| CN211605330U true CN211605330U (en) | 2020-09-29 |
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| CN202020245223.5U Active CN211605330U (en) | 2020-03-03 | 2020-03-03 | Explosion-proof lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641896A (en) * | 2023-07-18 | 2023-08-25 | 高邑县浩瀚金属制品有限公司 | Safe explosion-proof sediment stuff pump |
| CN117410642A (en) * | 2023-12-11 | 2024-01-16 | 无锡市金杨新材料股份有限公司 | Explosion-proof battery of liquid filling port |
-
2020
- 2020-03-03 CN CN202020245223.5U patent/CN211605330U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641896A (en) * | 2023-07-18 | 2023-08-25 | 高邑县浩瀚金属制品有限公司 | Safe explosion-proof sediment stuff pump |
| CN116641896B (en) * | 2023-07-18 | 2023-09-19 | 高邑县浩瀚金属制品有限公司 | Safe explosion-proof sediment stuff pump |
| CN117410642A (en) * | 2023-12-11 | 2024-01-16 | 无锡市金杨新材料股份有限公司 | Explosion-proof battery of liquid filling port |
| CN117410642B (en) * | 2023-12-11 | 2024-02-27 | 无锡市金杨新材料股份有限公司 | Explosion-proof battery of liquid filling port |
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