CN209804718U - Lithium battery shell - Google Patents
Lithium battery shell Download PDFInfo
- Publication number
- CN209804718U CN209804718U CN201920458926.3U CN201920458926U CN209804718U CN 209804718 U CN209804718 U CN 209804718U CN 201920458926 U CN201920458926 U CN 201920458926U CN 209804718 U CN209804718 U CN 209804718U
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- CN
- China
- Prior art keywords
- lithium battery
- mounting hole
- pressure
- battery cell
- shell
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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
Abstract
The utility model provides a lithium battery shell, which comprises a shell body with an accommodating cavity, wherein the shell body is arranged on the shell body to form an upper shell body which is sealed with the accommodating cavity, a pressure-bearing bulge which is arranged in an outward protruding way to bear the internal pressure of a lithium battery is constructed on the upper shell body, and a first mounting hole and a second mounting hole are arranged on the pressure-bearing bulge; the lithium battery shell also comprises a breathable film and a sealing film, wherein the breathable film is sealed on the first mounting hole, the sealing film is sealed on the second mounting hole, and the sealing film can explode due to overlarge internal pressure of the lithium battery. The lithium battery shell of the utility model can absorb the pressure when the internal pressure of the lithium battery becomes large by arranging the pressure-bearing bulge on the upper shell, thereby protecting the lithium battery to a certain extent; the air permeability of the battery is improved through the air permeable film, so that the generation of condensed water in the lithium battery can be obviously reduced; and the sealing film can be exploded when the internal pressure of the lithium battery is overlarge, so that the safety of the battery is improved.
Description
Technical Field
The utility model relates to a lithium cell technical field, in particular to lithium battery shell.
background
In the prior art, an explosion-proof structure is generally required to be arranged on a lithium battery so as to prevent the safety of a battery pack from being affected due to the overlarge internal pressure of the battery. The explosion-proof structure can realize air exchange between the inside and the outside of the battery, so that the pressure in the battery is kept within a certain safety range. That is, when excessive gas is generated inside the battery, the excessive gas can be discharged through the explosion-proof structure.
In addition, because among the explosion-proof structure, though can play ventilative effect, nevertheless lack the control to the business turn over of vapor to can be under some circumstances, make vapor pass through explosion-proof structure and get into in the battery, when vapor accumulates to a certain extent, have the risk that causes the inside short circuit of battery.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a lithium battery case having better air permeability and capable of improving the safety of a lithium battery.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
A lithium battery cell casing comprising:
A case body having a housing chamber to constitute housing of an electrode body and an electrolyte of a lithium battery;
The upper shell is arranged on the shell body to form sealing of the accommodating cavity, a pressure-bearing bulge protruding outwards to bear the internal pressure of the lithium battery is constructed on the upper shell, and a first mounting hole and a second mounting hole are formed in the pressure-bearing bulge;
the explosion-proof breathable part comprises a breathable film and a sealing film, wherein the breathable film is sealed and covered on the first mounting hole, the sealing film is sealed and covered on the second mounting hole, and the sealing film can explode due to the fact that the internal pressure of the lithium battery is too large.
Furthermore, a bulge is arranged on the peripheral surface of the shell around the circumferential direction of the shell body close to the opening end of the shell body; the edge of the upper shell is provided with a groove which can be matched with the bulge, and the bulge is matched with the groove and welded to form the fixed connection between the upper shell and the shell body.
Further, the cross section of the pressure-bearing bulge is arc-shaped.
Further, the pressure bearing protrusion extends along the length direction of the upper shell.
Furthermore, the first mounting hole and the second mounting hole are arranged on two opposite side edges of the pressure bearing bulge, and the first mounting hole and the second mounting hole are symmetrically arranged.
Further, the area of the first mounting hole is smaller than that of the second mounting hole.
further, the first mounting hole is circular.
further, the second mounting hole is rectangular.
Further, a sealing ring is arranged between the shell body and the upper shell.
furthermore, a through hole for the battery cell pole to pass through is formed in the upper shell.
Compared with the prior art, the utility model discloses following advantage has:
(1) Lithium battery cell shell, protruding through setting up the pressure-bearing on last casing, can absorb pressure when lithium cell internal pressure grow, and can protect the lithium cell to a certain extent. The air permeability of the battery can be improved by arranging the air permeable film, so that the generation of condensed water in the lithium battery can be obviously reduced; and the sealing film can be exploded when the internal pressure of the lithium battery is overlarge, so that the safety of the battery is improved.
(2) Go up casing and casing body and carry out welded fastening again through the cooperation of arch and recess, and fixed mode is reliable, effectively improves battery case's result of use.
(3) The arc-shaped bearing bulge is easy to machine and form, and has obvious pressure absorption effect.
(4) the arrangement direction of the pressure bearing bulges can be beneficial to increasing the volume of the pressure bearing space, namely, the bearing capacity to the internal pressure is improved.
(5) The position relation between the breathable film and the sealing film is beneficial to improving the connectivity between the breathable film and the sealing film, so that the breathability is improved.
(6) The first mounting hole has a smaller area than the second mounting hole, so that water vapor entering the battery can be reduced, and the safety performance of the battery can be improved.
(7) the sealing washer helps improving the sealing performance between casing body and the last casing, and its structure is mature, and sealing performance is good.
Drawings
the accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
Fig. 1 is a schematic structural diagram of a lithium battery case according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a lithium battery case according to an embodiment of the present invention at another viewing angle;
Fig. 3 is a schematic structural diagram of a lithium battery case according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an upper housing according to an embodiment of the present invention;
Description of reference numerals:
1-upper shell, 101-bearing bulge, 1011-first mounting hole, 1012-second mounting hole, 102-groove and 103-through hole;
2-housing body, 201-projection.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
the present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment relates to a lithium battery shell, which comprises a shell body with an accommodating cavity, wherein the shell body is arranged on the shell body to form an upper shell for sealing the accommodating cavity, a pressure bearing bulge is constructed on the upper shell and convexly arranged to bear the internal pressure of a lithium battery, and a first mounting hole and a second mounting hole are formed in the pressure bearing bulge. The lithium battery shell also comprises an explosion-proof breathable part, namely a breathable film covering the first mounting hole, and a sealing film covering the second mounting hole, wherein the sealing film can explode due to the overlarge internal pressure of the lithium battery.
Based on the above design concept, an exemplary structure of the lithium battery case in the embodiment is as shown in fig. 1 and fig. 2, the pressure-bearing protrusion 101 is arranged to extend along the length direction of the upper case 1, and the cross section of the pressure-bearing protrusion 101 in the width direction of the upper case 1 is in the shape of a circular arc, so that the pressure-bearing protrusion is convenient to machine and form on the upper case 1, and can be beneficial to buffering and absorbing the air flow generated inside the battery, and improving the bearing effect on the internal pressure. The first mounting hole 1011 and the second mounting hole 1012 are specifically disposed on two opposite sides of the pressure-bearing protrusion 101, and the first mounting hole 1011 and the second mounting hole 1012 are symmetrically disposed, so that the explosion effect of the sealing film is improved, the rapid explosion is realized, and the safety of the battery is improved. Meanwhile, through holes 103 through which the poles of the battery cell pass are respectively formed at both ends of the upper case 1 in the length direction.
It should be noted that the permeable membrane in this embodiment is a waterproof permeable membrane in the prior art, and when the pressure inside the battery is too high, the internal gas can enter the outside through the permeable membrane, so as to be beneficial to maintaining the pressure between the inside and the outside of the battery in a balanced state, and ensure the working effect of the battery. At the same time. The ventilated membrane is fixed on the upper shell 1 in an adhesion mode, and the operation mode is simple.
The sealing film is an explosion-proof sealing film in the prior art, which can be exploded when the internal pressure is too high, and is fixed to the upper case 1 by means of adhesive bonding. In order to reduce the amount of water vapor entering as much as possible while ensuring air permeability, the area of the first mounting hole 1011 in this embodiment is smaller than that of the second mounting hole 1012, and the first mounting hole 1011 has a circular cross section and the second mounting hole 1012 has a rectangular cross section.
Of course, the specific shape of the first mounting hole 1011 and the second mounting hole 1012 in this embodiment may be other shapes than circular or rectangular, but it is necessary to satisfy the principle that the area of the first mounting hole 1011 is smaller than the area of the second mounting hole 1012.
With reference to fig. 3 and 4, in order to improve the connection effect between the upper casing 1 and the casing body 2, a protrusion is disposed on the outer circumferential surface of the casing body 2, close to the opening end of the casing body 2, around the circumferential direction of the casing body 2; and a groove 102 which can be matched with the protrusion 201 is formed at the edge of the upper shell 1, and the protrusion 201 is matched with the groove 102 and welded, so that the upper shell 1 and the shell body 2 are fixedly connected.
Besides, in order to improve the sealing effect between the upper casing 1 and the casing body 2, in this embodiment, a sealing ring is disposed between the upper casing 1 and the casing body 2, which has a mature structure and a good sealing effect.
In summary, the lithium battery case described in this embodiment can absorb pressure when the internal pressure of the lithium battery becomes large by providing the pressure-bearing protrusion 101 on the upper case 1, and can protect the lithium battery to a certain extent. The air permeability of the battery can be improved by arranging the air permeable film, so that the generation of condensed water in the lithium battery can be obviously reduced; and the sealing film can be exploded when the internal pressure of the lithium battery is overlarge, so that the safety of the battery is improved.
the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. a lithium battery cell casing, comprising:
a case body (2) having a housing chamber for housing an electrode body and an electrolyte of a lithium battery;
The upper shell (1) is arranged on the shell body (2) to form a seal for the accommodating cavity, a pressure-bearing bulge (101) protruding outwards to bear the internal pressure of the lithium battery is constructed on the upper shell (1), and a first mounting hole (1011) and a second mounting hole (1012) are formed in the pressure-bearing bulge (101);
The explosion-proof breathable part comprises a breathable film and a sealing film, wherein the breathable film is covered on the first mounting hole (1011), the sealing film is covered on the second mounting hole (1012), and the sealing film can be exploded due to the overlarge internal pressure of the lithium battery.
2. The lithium battery cell casing of claim 1, wherein: a bulge (201) is arranged on the peripheral surface of the shell body (2) and surrounds the circumferential direction of the shell body (2) close to the opening end of the shell body (2); the edge of the upper shell (1) is provided with a groove (102) which can be matched with the protrusion (201), and the protrusion (201) is matched with the groove (102) and welded to form the fixed connection between the upper shell (1) and the shell body (2).
3. the lithium battery cell casing of claim 1, wherein: the cross section of the pressure bearing bulge (101) is arc-shaped.
4. the lithium battery cell casing of claim 1, wherein: the pressure-bearing bulge (101) extends along the length direction of the upper shell (1).
5. The lithium battery cell casing of claim 1, wherein: the first mounting hole (1011) and the second mounting hole (1012) are arranged on two opposite side edges of the pressure bearing protrusion (101), and the first mounting hole (1011) and the second mounting hole (1012) are symmetrically arranged.
6. The lithium battery cell casing of claim 1, wherein: the area of the first mounting hole (1011) is smaller than the area of the second mounting hole (1012).
7. The lithium battery cell casing of claim 6, wherein: the first mounting hole (1011) is circular.
8. The lithium battery cell casing of claim 6, wherein: the second mounting hole (1012) is rectangular.
9. The lithium battery cell casing of any one of claims 1-8, wherein: a sealing ring is arranged between the shell body (2) and the upper shell (1).
10. The lithium battery cell casing of claim 1, wherein: and a through hole (103) for a battery cell pole to pass through is formed in the upper shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920458926.3U CN209804718U (en) | 2019-04-04 | 2019-04-04 | Lithium battery shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920458926.3U CN209804718U (en) | 2019-04-04 | 2019-04-04 | Lithium battery shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209804718U true CN209804718U (en) | 2019-12-17 |
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ID=68828581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920458926.3U Active CN209804718U (en) | 2019-04-04 | 2019-04-04 | Lithium battery shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209804718U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970581A (en) * | 2019-12-23 | 2020-04-07 | 东莞塔菲尔新能源科技有限公司 | Light lithium battery shell and preparation method thereof |
-
2019
- 2019-04-04 CN CN201920458926.3U patent/CN209804718U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110970581A (en) * | 2019-12-23 | 2020-04-07 | 东莞塔菲尔新能源科技有限公司 | Light lithium battery shell and preparation method thereof |
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