CN218351685U - Battery core, battery pack and electric equipment - Google Patents
Battery core, battery pack and electric equipment Download PDFInfo
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- CN218351685U CN218351685U CN202222292868.6U CN202222292868U CN218351685U CN 218351685 U CN218351685 U CN 218351685U CN 202222292868 U CN202222292868 U CN 202222292868U CN 218351685 U CN218351685 U CN 218351685U
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- tab
- battery cell
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- end surface
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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 discloses an electricity core, battery package and consumer, electricity core includes: the battery cell comprises a battery cell body, a battery cell body and a battery cell, wherein the battery cell body comprises two body end surfaces which are oppositely arranged along the length direction of the battery cell body and a side surface which is positioned between the two body end surfaces; the lug is arranged on the end surface of the body and is provided with a lug end surface parallel to the end surface of the body; the tab protection glue comprises a first portion and a second portion which are connected, the first portion surrounds the tab and the side face in the length direction of the battery cell body, and the second portion at least covers the edge portion of the end face of the tab. The first portion that utmost point ear protection was glued coats utmost point ear and the part height of the side of electric core body on the length direction that encircles the electric core body, and the marginal portion of the at least cladding utmost point ear terminal surface of second part increases the area of utmost point ear protection glue protection utmost point ear, and the antipodal ear forms effectual constraint, effectively separates utmost point ear and casing, improves the security performance of battery.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to electricity core, battery package and consumer.
Background
With the development of the times, people use lithium ion batteries more and more frequently, and the requirements are higher and higher.
Among present cylinder lithium cell, positive negative pole ear sets up respectively in the both ends of cylinder electricity core, and positive negative pole ear can form utmost point ear terminal surface after coiling and utmost point ear processing, and in utmost point ear and current collector plate welding process, utmost point ear easily leads to the fact the short circuit with aluminum hull inner wall overlap joint, can wrap up round insulating tape at utmost point ear outer lane at present and separate utmost point ear and aluminum hull to improve cylinder lithium cell's security performance.
However, because the wrapped insulating tape is in a vertical state, the insulating tape in the vertical state is easily extruded in the assembling process, so that the effect of effectively separating the tab from the aluminum shell is lost, the insulating property of the insulating tape between the tab and the aluminum shell is detected without an effective detection method in the subsequent process, and the safety performance of the cylindrical lithium battery is greatly reduced.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a battery cell, a battery pack, and an electrical device.
In a first aspect, an embodiment of the present invention provides an electrical core, including:
the battery cell comprises a battery cell body, a battery cell body and a battery cell, wherein the battery cell body comprises two body end surfaces which are oppositely arranged along the length direction of the battery cell body and a side surface which is positioned between the two body end surfaces;
the lug is arranged on the end surface of the body and is provided with a lug end surface parallel to the end surface of the body;
the tab protection glue comprises a first portion, a bending portion and a second portion which are sequentially connected, wherein the first portion surrounds the tab and the side face in the length direction of the battery cell body, and the second portion at least covers the edge portion of the end face of the tab.
In some examples, the tab protection glue further includes a bent portion connecting the first portion and the second portion.
In some examples, the bent portion has a rounded corner structure with a radius of 20mm or less.
In some examples, the included angle between the second part and the tab end surface is 0-10 degrees.
In some examples, the bent portion has a chamfered structure having a radius of 10mm or less.
In some examples, the thickness of the tab protection glue is 10 μm to 200 μm.
In some examples, the cell is cylindrical, and the width of the second portion in any radial direction of the tab end surface is 10% to 90% of the radial width of the tab end surface.
In some examples, the battery cell is cylindrical, and the width of the second part is 1.1 to 1.3 times the height of the tab in any radial direction of the tab end surface.
In a second aspect, an embodiment of the present invention provides a battery, including a casing and the above-mentioned electric core, where the electric core is disposed in the casing; the first portion spaces the tab from the side wall of the housing to insulate the side wall of the housing from the tab.
In a third aspect, an embodiment of the present invention provides a battery pack, which includes a battery box and a plurality of batteries as described above, wherein the batteries are disposed in the battery box.
In a fourth aspect, an embodiment of the present invention provides an electric device, including the above battery pack.
The embodiment of the utility model provides a technical scheme can include following beneficial effect:
the embodiment of the utility model provides an electricity core, a battery, battery package and consumer, the utmost point ear protection that electricity core includes is glued including the first portion and the second portion that link to each other, on the length direction of electricity core body, the first portion encircles the part of utmost point ear and side, the marginal portion of the at least cladding utmost point ear terminal surface of second portion, the first portion separates the lateral wall of utmost point ear and casing so that the lateral wall and the utmost point ear of casing are insulating, the second portion increases the area that utmost point ear protection glued the utmost point ear, to the utmost point ear form effectual constraint, effectively separate utmost point ear and casing, improve the battery, the security performance of battery package and consumer.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a tab protection adhesive according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery cell according to another embodiment of the present invention;
fig. 4 is a schematic structural view of a tab protection adhesive according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a tab protection adhesive according to another embodiment of the present invention;
fig. 6 is another schematic cross-sectional view of a tab protection film according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a battery cell according to another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
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.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides an electrical core, including:
the battery cell comprises a battery cell body 11, wherein the battery cell body 11 comprises two body end surfaces which are oppositely arranged along the length direction of the battery cell body and a side surface which is positioned between the two body end surfaces;
the tab 12 is arranged on the end face of the body, and the tab 12 is provided with a tab end face parallel to the end face of the body;
the tab protection glue 13, the tab protection glue 13 includes a first portion 131 and a second portion 132 connected to each other, in the length direction of the cell body 11, the first portion 131 surrounds the tab and the side portion, and the second portion 132 at least covers the edge portion of the tab end face.
Fig. 1 illustrates a structure in which a tab is connected to one of the body end faces of the cell body, and tab protection glue is coated on the outer side of the tab, it can be understood that the tab and the tab protection glue are arranged on the other body end face of the cell body in the same manner.
The first part of the tab protection glue is of a cylindrical structure, and for convenience of description, the two body end faces of the battery cell in fig. 1 are divided into an upper body end face and a lower body end face. The lower edge of the first part of the tab protection glue corresponding to the end surface of the upper body is positioned below the end surface of the upper body, so that the tabs, the parts of the tabs connected with the battery cell body are well bound, and the safety performance of the battery cell is improved; and the second part of the tab protection glue corresponding to the end surface of the upper body at least covers the edge part of the end surface of the tab, and the second part is in contact with the end surface of the tab. By the arrangement, the tab protection adhesive not only protects the side face of the tab, but also protects the end face of the tab, the tab protection adhesive effectively separates the tab from the shell, and the safety performance of the battery cell is effectively improved.
As shown in fig. 3 and 4, another embodiment of the present invention provides an electrical core, including:
the battery cell comprises a battery cell body 11, wherein the battery cell body 11 comprises two body end surfaces which are oppositely arranged along the length direction of the battery cell body and a side surface which is positioned between the two body end surfaces;
the tab 12 is arranged on the end face of the body, and the tab 12 is provided with a tab end face parallel to the end face of the body;
the tab protection adhesive 13, the tab protection adhesive 13 includes a first portion 131, a bent portion 133 and a second portion 132 connected in sequence, in the length direction of the cell body 11, the first portion 131 surrounds the tab and the side portion, and the second portion 132 at least covers the edge portion of the tab end face.
Different from the previous embodiment, the tab protection glue 13 further includes a bent portion 133, the first portion 131 and the second portion 132 are connected by the bent portion 133, and the bent portion 133 enables the second portion 132 to form a good transition with the first portion 131, so as to avoid stress concentration caused by direct connection between the first portion 131 and the second portion 132, thereby avoiding the tab protection glue 13 from being easily damaged at the connection position of the first portion 131 and the second portion 132.
In a preferred embodiment, the bending portion 133 has a rounded structure, and the radius of the rounded structure is less than or equal to 20mm. If the first portion is directly bent to the second portion, the tab protection adhesive is easily damaged due to stress concentration at the corner, and the bent portion 133 has a good transition function between the first portion 131 and the second portion 133.
Wherein, the radius of the round corner structure can be 2mm, 3mm, 4mm, 5mm or 6mm, etc.
In some exemplary embodiments, the included angle between the second portion 132 and the tab end surface is 0 ° to 10 °, for example, 0 °, 1 °, 2 °, 3 °, 4 °, or 5 °, etc.
In fig. 5 and 6, the positions of the tab end surfaces are indicated by broken lines. Referring to fig. 5, the included angle α indicates the included angle between the second portion 132 and the tab end surface; referring to fig. 6, the included angle β indicates the included angle between the second portion 132 and the tab end surface. The angle between the second portion 132 and the tab end surface may also be 0 deg., and the second portion 132 covers at least the edge portion of the tab end surface such that the second portion 132 separates the tab end surface from the battery case.
In a preferred embodiment, the angle between the second portion 132 and the tab end surface is 3 °. The preferred included angle between second part 132 and the utmost point ear terminal surface is the state in fig. 5, and this negative included angle is 3, easily realizes the contact of second part 132 and utmost point ear terminal surface for second part 132 of utmost point ear protection glue 13 forms good protection to utmost point ear terminal surface, improves the restraint performance of utmost point ear protection glue 13 to utmost point ear, thereby improves the insulating effect of utmost point ear protection glue 13.
In some exemplary embodiments, the cell is cylindrical, and the width of the second portion in any radial direction of the tab end surface accounts for 10% to 90% of the radial width of the tab end surface. The width of the second part can be set according to the radial width of the end face of the tab, and the width of the second part is preferably 10% -30% of the radial width of the end face of the tab, so that the second part can protect the end face of the tab, and the subsequent assembly of a battery core and other parts of a battery is not influenced, and the insulation performance of tab protection glue is ensured.
In some exemplary embodiments, the electrical core is cylindrical, and the width of the second portion is 1.1 to 1.3 times the height of the tab in any radial direction of the tab end surface, for example, the width of the second portion is 1.1, 1.2 or 1.3 times the height of the tab. The width of the second part can be set according to the height of the lug, the widths of the second parts corresponding to different lug heights are different, the end faces of the lug are protected by the second part, and the size of the second part is matched with the height of the lug while the assembly of a follow-up battery cell and other parts of a battery is not influenced.
In some exemplary embodiments, the thickness of the tab protection paste is 10 μm to 200 μm. The bending part and the second part in the embodiment are formed by bending the part which extends out of the end face of the pole lug and is in a vertical state relative to the end face of the pole lug in the prior art, and the thickness of the pole lug protection glue is 10-200 mu m, so that the bending part and the second part are conveniently formed.
Preferably, the thickness of the tab protection glue is 60 μm, which not only facilitates the formation of the bending part and the second part, but also ensures that the tab protection glue has a good insulation effect between the battery core and the battery shell.
Referring to fig. 5, another embodiment of the present invention provides an electrical core, which includes an electrical core body 11, a tab 12 and a tab protection film 13, wherein the bending portion 12 is a chamfer structure, and the radius of the chamfer structure is less than or equal to 10mm.
The chamfering structure in the embodiment can also realize good transition between the first part and the second part, and the damage of the tab protection adhesive at the bent part caused by stress concentration is avoided.
Wherein, the radius of the chamfer structure can be 2mm, 3mm, 4mm, 5mm or 6mm, etc.
The embodiment of the utility model also provides a battery, which comprises a shell and the electric core, wherein the electric core is arranged in the shell; the first portion of the tab protection paste of the cell separates the tab from the side wall of the housing to insulate the side wall of the housing from the tab.
The battery provided by the embodiment has the battery core, the first part of the tab protection glue separates the tab from the side wall of the shell, and the second part increases the area of the tab protection. The battery with the battery cell enables the lug to be effectively insulated from the side wall of the shell through the lug protection glue of the battery cell, and the performance of the battery is improved.
The embodiment of the utility model provides a still provide a battery package, including battery box and a plurality of as above the battery, the battery setting is in the battery box.
The embodiment of the utility model provides a still provide an electric equipment, including above-mentioned battery package. The electric equipment can be vehicles, ships, aircrafts and the like, and can also be other devices.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The present invention employs the first, second, etc. to describe various information, but the information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the invention and is intended to illustrate the technical principles applied. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments that can be formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features and (but not limited to) technical features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.
Claims (11)
1. A battery cell, comprising:
the battery cell comprises a battery cell body, a battery cell body and a battery cell, wherein the battery cell body comprises two body end surfaces which are oppositely arranged along the length direction of the battery cell body and a side surface which is positioned between the two body end surfaces;
the lug is arranged on the end surface of the body and is provided with a lug end surface parallel to the end surface of the body;
the tab protection glue comprises a first portion and a second portion which are connected, the first portion surrounds the tab and the side face in the length direction of the battery cell body, and the second portion at least covers the edge portion of the end face of the tab.
2. The cell of claim 1, wherein the tab protection glue further comprises a bent portion connecting the first portion and the second portion.
3. The battery cell of claim 2, wherein the bent portion is a rounded corner structure having a radius of 20mm or less.
4. The battery cell of claim 2, wherein the bent portion is a chamfered structure having a radius of 10mm or less.
5. The cell of claim 1, wherein an included angle between the second portion and the tab end surface is 0 ° to 10 °.
6. The battery cell of claim 1, wherein the tab protection glue has a thickness of 10 μm to 200 μm.
7. The cell of claim 1, wherein the cell is cylindrical, and the width of the second portion in either radial direction of the tab end surface is 10% to 90% of the radial width of the tab end surface.
8. The electrical core of claim 1, wherein the electrical core is cylindrical, and the width of the second portion is 1.1 to 1.3 times the height of the tab in any radial direction of the tab end surface.
9. A battery comprising a housing and the cell of any of claims 1-8, the cell disposed within the housing; the first portion spaces the tab from the side wall of the housing to insulate the side wall of the housing from the tab.
10. A battery pack comprising a battery housing and a plurality of batteries as claimed in claim 9, said batteries being disposed within said battery housing.
11. An electric device comprising the battery pack according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222292868.6U CN218351685U (en) | 2022-08-30 | 2022-08-30 | Battery core, battery pack and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222292868.6U CN218351685U (en) | 2022-08-30 | 2022-08-30 | Battery core, battery pack and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218351685U true CN218351685U (en) | 2023-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222292868.6U Active CN218351685U (en) | 2022-08-30 | 2022-08-30 | Battery core, battery pack and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218351685U (en) |
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2022
- 2022-08-30 CN CN202222292868.6U patent/CN218351685U/en active Active
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