CN217086796U - Lithium battery shell and lithium battery - Google Patents
Lithium battery shell and lithium battery Download PDFInfo
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- CN217086796U CN217086796U CN202220260414.8U CN202220260414U CN217086796U CN 217086796 U CN217086796 U CN 217086796U CN 202220260414 U CN202220260414 U CN 202220260414U CN 217086796 U CN217086796 U CN 217086796U
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Abstract
The utility model relates to a lithium cell field provides a lithium battery shell and lithium cell, lithium battery shell includes: the shell body is cylindrical, and at least one of a first nick and a second nick is arranged on the outer side wall of the shell body; the first nick is linear and extends along the axial direction of the shell body; the second nick is spiral and extends along the circumferential direction of the shell body. The utility model discloses a set up first nick and/or second nick on the shell body, can assist the explosion-proof valve on the lithium cell to carry out the pressure release for the inside of lithium cell jointly, promoted the speed of pressure release, avoid because explosion-proof valve pressure release is not too late the explosion that produces often.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a lithium battery shell and lithium cell.
Background
Lithium batteries are widely used in various fields, for example, lithium batteries can be used in traffic power supplies and also in power storage power supplies.
When the lithium battery is used, if the lithium battery has the phenomena of overcharge, short circuit or incineration, the internal pressure of the lithium battery is high, and explosion is easy to occur, so that the safety of the lithium battery in the use process needs to be fully considered in the design process of the lithium battery; the pressure relief is realized through setting up explosion-proof valve to current lithium cell, and the pressure regulating range of explosion-proof valve is limited however, easily leads to the inside pressure relief of lithium cell not in time, has great potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lithium battery shell and lithium cell for there is the relatively poor problem of pressure release effect in current lithium cell solution or improvement under the great condition of internal pressure.
The utility model provides a lithium battery shell, include: a housing body; the shell body is cylindrical; at least one of a first nick and a second nick is arranged on the outer side wall of the shell body; the first score is linear and extends along the axial direction of the shell body; the second nick is helical, and the second nick extends along the circumference of the shell body.
According to the utility model provides a pair of lithium battery shell be equipped with under the condition of first nick on the lateral wall of shell body, first nick with projection shape on the first nick extending direction vertically cross-section is triangle-shaped or semi-circular.
According to the utility model provides a pair of lithium battery shell be equipped with on the lateral wall of shell body under the condition of second nick, the second nick with projection shape on the second nick extending direction vertically cross-section is triangle-shaped or semi-circular.
According to the lithium battery shell provided by the utility model, under the condition that the shell body is a steel shell, the shell body comprises a first shell wall and a shell bottom; the shell bottom is arranged at one end of the first shell wall; the first score and/or the second score are/is arranged on the first shell wall; and a third nick is arranged on the shell bottom, and the projection shape of the third nick on the plane where the shell bottom is located is circular, elliptical or polygonal.
According to the utility model provides a pair of lithium battery shell, the third nick with the projection shape on the third nick extending direction vertically cross-section is triangle-shaped or semi-circular.
According to the utility model provides a pair of lithium battery shell, shell body still includes: a battery cap; the battery cap is disposed at the other end of the first housing wall.
According to the lithium battery shell provided by the utility model, under the condition that the shell body is an aluminum shell, the shell body comprises a second shell wall, a positive electrode cover plate and a negative electrode cover plate; the first score and/or the second score are/is arranged on the second shell wall; the positive cover plate and the negative cover plate are respectively arranged at two ends of the second shell wall.
The utility model also provides a lithium cell, include: the battery roll core and the lithium battery shell are provided; the battery roll core is arranged in the lithium battery shell.
According to the utility model provides a pair of lithium cell, the lithium cell still includes: an explosion-proof valve; the explosion-proof valve is arranged on the lithium battery shell.
The utility model provides a lithium battery shell and lithium cell, through set up first nick or second nick on the lateral wall of shell body, then the shell body is thinner at the conch wall of first nick or second nick department, intensity is also lower correspondingly, appear overcharging at the lithium cell, short circuit or when burning the phenomenon, the battery rolls up the core and produces a large amount of gas, the internal pressure of shell body increases, the shell body of first nick or second nick department can be torn to pressure, and form the breach, gaseous accessible breach quick discharge shell body, realize the inside pressure release of lithium cell, thereby avoid producing the phenomenon of explosion because pressure surge in the lithium cell, the security of lithium cell has been promoted.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a first notch provided on a steel shell according to the present invention;
FIG. 2 is a schematic structural view of a second notch provided on the steel shell according to the present invention;
fig. 3 is a schematic structural view of the first notch provided in the aluminum shell according to the present invention;
fig. 4 is a schematic structural view of a second notch provided on an aluminum shell according to the present invention;
fig. 5 is a first structural schematic diagram of cross sections of the first nick, the second nick and the third nick provided by the present invention;
fig. 6 is a second structural schematic diagram of a cross section of the first nick, the second nick and the third nick provided by the present invention;
fig. 7 is a schematic view of a projection of a third score on the bottom of the shell;
fig. 8 is a schematic view illustrating a processing principle of the first notch according to the present invention;
reference numerals:
1: a housing body; 11: a first shell wall; 12: a shell bottom; 13: a battery cap; 14: a second shell wall; 15: a positive electrode cover plate; 16: a negative electrode cover plate; 2: a first score; 3: a second score; 4: a third score; 5: fixing the tool; 6: provided is a vertical milling cutter.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
The following describes a lithium battery case and a lithium battery provided by the present invention with reference to fig. 1 to 8.
As shown in fig. 1 to 4, the lithium battery case shown in the present embodiment includes: the battery case comprises a case body 1, wherein the case body 1 is cylindrical, and a battery winding core is arranged in the case body 1.
At least one of a first nick 2 and a second nick 3 is arranged on the outer side wall of the shell body 1; it can be understood that only the first nick 2 is provided on the outer side wall of the housing body 1, or only the second nick 3 is provided on the outer side wall of the housing body 1, or the first nick 2 and the second nick 3 are provided on the outer side wall of the housing body 1; wherein, the first nick 2 is linear, the first nick 2 extends along the axial direction of the shell body 1; the second score 3 is helical, and the second score 3 extends along the circumferential direction of the housing body 1.
Specifically, the lithium battery case shown in this embodiment, through set up first nick 2 or second nick 3 on housing body 1's lateral wall, then housing body 1 is thinner at the conchal wall of first nick 2 or second nick 3 department, intensity is also lower correspondingly, overcharge appears in the lithium cell, when short circuit or burning phenomenon, the battery rolls up a core and produces a large amount of gas, housing body 1's internal pressure increase, housing body 1 of first nick 2 or second nick 3 department can be torn to pressure, and form the breach, gaseous accessible breach quick discharge housing body 1, realize the inside pressure release of lithium cell, thereby avoid in the lithium cell because the pressure surge produces the phenomenon of explosion, the security of lithium cell has been promoted.
Wherein, first nick 2 and second nick 3 all can be formed through milling cutter milling process, under the condition that does not influence 1 intensity of shell body, the degree of depth of first nick 2 and second nick 3 can be decided according to the pressure release pressure of lithium cell actual demand, under the great condition of the pressure release pressure of demand, the degree of depth of first nick 2 and second nick 3 is lighter, under the less condition of the pressure release pressure of demand, the degree of depth of first nick 2 and second nick 3 is darker.
It should be noted that, in the case that the outer side wall of the housing body 1 is provided with the first nick 2 and the second nick 3 at the same time, since the second nick 3 is spiral, the first nick 2 is provided between two adjacent second nicks 3, and the process of milling the first nick 2 and the second nick 3 at the same time on the housing body 1 is complicated, therefore, in view of the processing cost, it is preferable to provide only the first nick 2 or only the second nick 3 on the housing body 1; when the first nicks 2 are provided in plurality, the plurality of first nicks 2 are uniformly distributed around the axis of the shell body 1; in the case that the second scores 3 are provided with a plurality of second scores 3, the plurality of second scores 3 are sequentially arranged at equal intervals, the structure of the plurality of second scores 3 is similar to a multi-thread structure known in the art, and the helix angle of the second scores 3 can be adjusted according to the actual pressure relief pressure.
In some embodiments, as shown in fig. 5 and 6, in the case where the first score 2 is provided on the outer sidewall of the housing body 1, the projection shape of the first score 2 on the cross section perpendicular to the extending direction of the first score 2 is triangular or semicircular.
Specifically, the first score 2 extends from one end of the housing body 1 to the other end of the housing body 1 along the axial direction of the housing body 1, and accordingly, the cross section of the first score 2 is the cross section of the first score 2 in the direction a-a in fig. 1, or the cross section of the first score 2 is the cross section of the first score 2 in the direction C-C in fig. 3; under the condition that the depth of the first nick 2 is fixed, the first nicks 2 with different cross sections correspond to different pressure relief pressures, and the first nicks 2 with different cross sections can be selected according to the pressure relief pressure required in practice.
As shown in fig. 8, the milling device for processing the first nick 2 comprises a fixing tool 5 and a vertical milling cutter 6, wherein the fixing tool 5 is provided with a groove matched with the outer side surface of the shell body 1, and the inner side wall of the groove is enclosed into a sector with a central angle larger than 180 degrees, so that the radial runout of the shell body 1 in the groove can be avoided; the shell body 1 is arranged in the groove along the axis direction of the groove, after the shell body is assembled in place, two ends of the shell body 1 are clamped by the clamp on the fixing tool 5, and the shell body 1 can be prevented from axially moving in the groove; the vertical milling cutter 6 moves to the outer side surface of the shell body 1 and moves along the axial direction of the shell body 1 to process a linear first nick 2; by replacing different kinds of vertical milling cutters 6, the first scores 2 with different cross-sectional shapes can be processed.
In some embodiments, as shown in fig. 5 and 6, in the case where the second score 3 is provided on the outer sidewall of the housing body 1, the projection shape of the second score 3 on the cross section perpendicular to the extending direction of the second score 3 is triangular or semicircular.
Specifically, the second score 3 extends from one end of the housing body 1 to the other end of the housing body 1 along the circumferential direction of the housing body 1, and accordingly, the cross section of the second score 3 is the cross section of the second score 3 in the direction B-B in fig. 2, or the cross section of the second score 3 is the cross section of the second score 3 in the direction D-D in fig. 4; under the condition that the depth of the second nick 3 is fixed, the second nicks 3 with different cross-sectional shapes correspond to different pressure relief pressures, and the second nicks 3 with different cross-sectional shapes can be selected according to the actual required pressure relief pressure.
Wherein, a milling equipment for processing second nick 3 includes the lathe, opens the lathe after fixing shell body 1 on the lathe, and the lathe tool contacts with rotatory shell body 1 to process spiral helicine second nick 3.
In some embodiments, as shown in fig. 1, 2 and 7, in the case that the housing body 1 is a steel shell, the housing body 1 includes a first shell wall 11 and a shell bottom 12; the shell bottom 12 is arranged at one end of the first shell wall 11; the first nick 2 and/or the second nick 3 are/is arranged on the first shell wall 11; the shell bottom 12 is provided with a third nick 4, and the projection shape of the third nick 4 on the plane of the shell bottom 12 is circular, oval or polygonal.
Specifically, under the condition that the housing body 1 is a steel shell, the whole housing body 1 is used as a negative electrode of a lithium battery, the first nick 2 or the second nick 3 is arranged on the first housing wall 11, the third nick 4 is arranged on the housing bottom 12, and in the pressure relief process, gas can be exhausted from the first housing wall 11 and also can be exhausted from the housing bottom 12, so that the pressure relief efficiency is improved.
In some embodiments, as shown in fig. 5 and 6, the projected shape of the third score 4 in the cross section perpendicular to the extending direction of the third score 4 is triangular or semicircular.
Specifically, the cross section of the third scribe 4 is a cross section of the third scribe 4 in the E-E direction in fig. 7; under the condition that the depth of the third score 4 is fixed, the third scores 4 with different cross-sectional shapes correspond to different pressure relief pressures, and the third scores 4 with different cross-sectional shapes can be selected according to the pressure relief pressure required in practice.
In some embodiments, as shown in fig. 1 and 2, the housing body 1 of the present embodiment further includes: a battery cap 13; a battery cap 13 is provided at the other end of the first housing wall 11.
Specifically, the battery cap 13 is used as the positive electrode of the lithium battery, and in the assembly process of the battery roll core and the housing body 1, the negative tab of the battery roll core is welded with the housing bottom 12, the positive tab of the battery roll core is welded with the battery cap 13, and the battery cap 13 and the first housing wall 11 are sealed by mechanical stamping.
In some embodiments, as shown in fig. 3 and 4, in the case that the housing body 1 is an aluminum housing, the housing body 1 includes a second housing wall 14, a positive electrode cover plate 15, and a negative electrode cover plate 16; the first score 2 and/or the second score 3 are/is arranged on the second shell wall 14; the positive electrode cover plate 15 and the negative electrode cover plate 16 are respectively arranged at two ends of the second shell wall 14.
Specifically, the positive cover plate 15 serves as the positive electrode of the lithium battery, the negative cover plate 16 serves as the negative electrode of the lithium battery, and in the process of assembling the battery roll core with the housing body 1, the negative tab of the battery roll core is welded with the negative cover plate 16, the positive tab of the battery roll core is welded with the positive cover plate 15, and the positive cover plate 15 and the negative cover plate 16 are both connected with the second housing wall 14 in a welding manner.
The utility model also provides a lithium cell, include: the battery roll core and the lithium battery shell are provided; the battery roll core is arranged in the lithium battery shell.
Since the lithium battery adopts the lithium battery case shown in the above embodiment, and the specific structure of the lithium battery case refers to the above embodiment, and since the lithium battery adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
In some embodiments, the lithium battery shown in this embodiment further includes: an explosion-proof valve; the explosion-proof valve is arranged on the lithium battery shell; when pressure in the lithium battery shell is smaller, the pressure relief can be realized through the explosion-proof valve, when the pressure in the lithium battery shell is larger, the pressure relief can be realized through the explosion-proof valve assisted by the first nick 2 or the second nick 3, and the explosion phenomenon caused by untimely pressure relief of the explosion-proof valve is avoided.
Wherein, under the condition that the shell body 1 is a steel shell, the explosion-proof valve is arranged on the battery cover cap of the shell body 1; in the case where the case body 1 is an aluminum case, the explosion-proof valve is provided on the positive electrode cover plate 15 of the case body 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A lithium battery case, comprising:
a housing body having a cylindrical shape; at least one of a first nick and a second nick is arranged on the outer side wall of the shell body;
the first score is linear and extends along the axial direction of the shell body;
the second nick is helical, and the second nick extends along the circumference of the shell body.
2. The lithium battery case of claim 1,
under the condition that a first nick is arranged on the outer side wall of the shell body, the projection shape of the first nick on the cross section perpendicular to the extending direction of the first nick is triangular or semicircular.
3. The lithium battery case of claim 1,
under the condition that the outer side wall of the shell body is provided with the second nick, the projection shape of the second nick on the cross section vertical to the extending direction of the second nick is triangular or semicircular.
4. The lithium battery case of claim 1,
in the case that the housing body is a steel shell, the housing body comprises a first shell wall and a shell bottom; the shell bottom is arranged at one end of the first shell wall; the first score and/or the second score are/is arranged on the first shell wall;
and a third nick is arranged on the shell bottom, and the projection shape of the third nick on the plane where the shell bottom is located is circular, elliptical or polygonal.
5. The lithium battery case of claim 4,
the projection shape of the third score on the cross section perpendicular to the extending direction of the third score is triangular or semicircular.
6. The lithium battery case of claim 4,
the housing body further includes: a battery cap;
the battery cap is disposed at the other end of the first housing wall.
7. The lithium battery case of claim 1,
under the condition that the shell body is an aluminum shell, the shell body comprises a second shell wall, a positive cover plate and a negative cover plate; the first score and/or the second score are/is arranged on the second shell wall;
the positive cover plate and the negative cover plate are respectively arranged at two ends of the second shell wall.
8. A lithium battery, comprising: a battery jelly roll and a lithium battery case according to any one of claims 1 to 7; the battery roll core is arranged in the lithium battery shell.
9. The lithium battery of claim 8, further comprising: an explosion-proof valve;
the explosion-proof valve is arranged on the lithium battery shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220260414.8U CN217086796U (en) | 2022-02-07 | 2022-02-07 | Lithium battery shell and lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220260414.8U CN217086796U (en) | 2022-02-07 | 2022-02-07 | Lithium battery shell and lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217086796U true CN217086796U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220260414.8U Active CN217086796U (en) | 2022-02-07 | 2022-02-07 | Lithium battery shell and lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217086796U (en) |
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2022
- 2022-02-07 CN CN202220260414.8U patent/CN217086796U/en active Active
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