CN214043758U - Cylindrical lithium ion battery and battery module - Google Patents
Cylindrical lithium ion battery and battery module Download PDFInfo
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- CN214043758U CN214043758U CN202023158790.6U CN202023158790U CN214043758U CN 214043758 U CN214043758 U CN 214043758U CN 202023158790 U CN202023158790 U CN 202023158790U CN 214043758 U CN214043758 U CN 214043758U
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- lithium ion
- cylindrical lithium
- central needle
- battery
- ion battery
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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 a cylindrical lithium ion battery and battery module relates to battery technical field. The cylindrical lithium ion battery comprises a shell, a battery cell and a center needle, wherein the shell is cylindrical; the battery cell is a winding battery cell, the battery cell is arranged in the shell and is coaxially arranged with the shell, and a containing cavity is formed in the center of the battery cell; the central needle is inserted into the accommodating cavity along the axial direction of the battery core; the central needle comprises a central needle body, wherein an expansion adhesive tape is arranged on the outer surface of the central needle body, and the expansion adhesive tape can expand to fill a gap between the outer surface of the central needle body and the wall of the accommodating cavity. The utility model provides a cylindrical lithium ion battery is through being equipped with the inflation sticky tape on the central needle surface, and the inflation sticky tape takes place the inflation back, can closely laminate with the inlayer of electric core, has reduced the potential safety hazard of battery in the course of the work.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a cylindrical lithium ion battery and battery module.
Background
The cell in the cylindrical lithium ion battery is formed in a cylindrical shape by winding positive and negative electrode sheets and a separator. The electric core center of this kind of production mode output can form the space, and at battery charge-discharge's in-process, the pole piece in the battery very easily takes place the inflation to lead to electric core to be close to the inlayer in space and take place deformation and then collapse, there is the potential safety hazard.
Therefore, it is desirable to provide a cylindrical lithium ion battery and a battery module to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cylindrical lithium ion battery and battery module can prevent effectively that electric core inlayer from warping, reduces the potential safety hazard of battery in work engineering.
In order to realize the purpose, the following technical scheme is provided:
a cylindrical lithium ion battery comprising:
a housing, which is cylindrical;
the battery cell is a winding battery cell and is arranged in the shell, the battery cell and the shell are coaxially arranged, and a containing cavity is formed in the center of the battery cell;
the central needle is inserted into the accommodating cavity along the axial direction of the battery core; the central needle comprises a central needle body, wherein an expansion adhesive tape is arranged on the outer surface of the central needle body, and the expansion adhesive tape can expand to fill a gap between the outer surface of the central needle body and the wall of the accommodating cavity.
As an alternative to the above cylindrical lithium ion battery, the expansion rate of the expansion tape is 50% to 100%.
As an alternative to the above cylindrical lithium ion battery, the ratio of the thickness of the expansion tape to the diameter of the central needle body is 1: (20-50).
As an alternative to the above cylindrical lithium ion battery, the expansion tape is spirally wound around the outer circumference of the central needle body.
As an alternative of the above cylindrical lithium ion battery, the casing includes an anode cap and a cathode cap that are sequentially arranged along the axial direction, the anode cap with be equipped with the positive current collector between the electric core, the cathode cap with be equipped with the negative current collector between the electric core, the one end of center needle through first insulating heat-conducting piece with the positive current collector links to each other, the other end through the second insulating heat-conducting piece with the negative current collector links to each other.
As an alternative of the cylindrical lithium ion battery, the outer layer of the expansion adhesive tape is covered with a heat-conducting coating.
As an alternative to the above cylindrical lithium ion battery, the thermally conductive coating is a ceramic thermally conductive coating.
As an alternative to the above cylindrical lithium ion battery, an adhesion promoter layer is provided between the thermally conductive coating and the expansion tape.
As an alternative to the above cylindrical lithium ion battery, the central pin is an insulated central pin.
A battery module comprises any one of the cylindrical lithium ion batteries, wherein the cylindrical lithium ion batteries are arranged in a plurality, and the plurality of cylindrical lithium ion batteries are mutually connected in series and/or in parallel.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a cylindrical lithium ion battery is through being equipped with the inflation sticky tape on the central needle surface, and the inflation sticky tape takes place the inflation, can closely laminate with the inlayer of electric core, avoids electric core inlayer to warp and the battery short circuit that leads to, has reduced the potential safety hazard of battery in the course of the work.
Drawings
Fig. 1 is a schematic structural view of a center needle in an embodiment of the present invention;
fig. 2 is a top view of the center pin according to the embodiment of the present invention.
Reference numerals:
1. a central needle; 11. a central needle body; 12. expanding the adhesive tape; 13. a thermally conductive coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 to 2, the present embodiment is described in detail. The embodiment provides a cylindrical lithium ion battery, which comprises a shell, a battery cell and a central needle 1, wherein the shell is cylindrical; the battery cell is of a winding type and is arranged in the shell, the battery cell and the shell are coaxially arranged, and a containing cavity is formed in the center of the battery cell; the central needle 1 is inserted into the accommodating cavity along the axial direction of the battery core; the central needle 1 comprises a central needle body 11, an expansion adhesive tape 12 is arranged on the outer surface of the central needle body 11, and the expansion adhesive tape 12 can expand to fill a gap between the outer surface of the central needle body 11 and the wall of the accommodating cavity.
This embodiment is through being equipped with inflation sticky tape 12 on the surface at center needle body 11, and inflation sticky tape 12 takes place the inflation back under the effect of electrolyte, can closely laminate with the inlayer of electric core, avoids the inlayer to warp and the battery short circuit that leads to, has reduced the potential safety hazard of battery in the course of the work.
Optionally, the expansion rate of the expansion adhesive tape 12 is 50% to 100%, so that the expansion adhesive tape 12 can be fully expanded under the action of the electrolyte, so as to fill a gap between the outer surface of the central needle body 11 and the wall of the cavity of the accommodating cavity, and the expanded expansion adhesive tape 12 is tightly attached to the inner layer of the battery cell, so as to provide a supporting force for the inner layer of the battery cell and avoid the deformation of the inner layer of the battery cell. The central needle 1 with the expansion adhesive tape 12 arranged on the insertion surface in the accommodating cavity can reduce the deformation space of the inner layer of the battery core, but the diameters of the accommodating cavities in the battery core are different due to different battery models, so that the selection of the expansion adhesive tape 12 with the appropriate expansion rate is the key for improving the applicability of the central needle 1. In actual production, the expansion tape 12 with the required expansion ratio is generally selected according to the difference between the diameter of the accommodating cavity and the diameter of the central needle body 11. In this embodiment, rubber and resin are selected as the base material of the expandable tape 12, so that the expandable tape has high expansion rate and good adhesion, and the expandable tape 12 is prevented from being separated from the central needle body 11 while the gap between the outer surface of the central needle body 11 and the wall of the accommodating cavity is ensured to be filled.
Further optionally, the ratio of the thickness of the expansion tape 12 to the diameter of the central needle body 11 is 1: (20-50), such as 1:20, 1:30, 1:35 or 1:47, etc. The appropriate thickness of the expansion adhesive tape 12 can be selected according to the expansion rate of the expansion adhesive tape 12 and the diameter of the central needle body 11, so that the expanded thickness of the expansion adhesive tape 12 is 90% -100% of the distance between the outer surface of the central needle body 11 and the wall of the accommodating cavity, and the phenomenon that the inner layer of the battery cell is extruded due to transitional expansion of the expansion adhesive tape 12 is avoided while enough supporting force is provided for the inner layer of the battery cell.
Further optionally, the expansion adhesive tape 12 is spirally wound on the periphery of the central needle body 11, and the expansion adhesive tape 12 is spirally wound in a setting manner, so that the expansion adhesive tape 12 is prevented from being attached after being cut, and the expansion adhesive tape 12 is convenient to set on the central needle body 11.
Optionally, the casing includes an anode cap and a cathode cap which are sequentially arranged along an axial direction, an anode current collecting disc is arranged between the anode cap and the battery core, a cathode current collecting disc is arranged between the cathode cap and the battery core, one end of the central needle 1 is connected with the anode current collecting disc through a first insulating heat conduction piece, the other end of the central needle is connected with the cathode current collecting disc through a second insulating heat conduction piece, and the arrangement of the insulating heat conduction pieces avoids the short circuit inside the battery caused by the direct connection between the central needle 1 and the anode current collecting disc and the cathode current collecting disc. Specifically, a plurality of grooves are formed in the positive and negative current collecting plates and used for accommodating positive and negative electrode lugs on the battery core, so that the battery can work normally. In this embodiment, a heat conductive silicone sheet may be selected as the first insulating heat conductive member and the second insulating heat conductive member.
Further optionally, the outer layer of the expansion adhesive tape 12 is covered with a heat conducting coating 13, the heat conducting coating 13 absorbs heat gathered in the battery, the heat is transmitted to the insulating heat conducting piece through the central needle body 11, and then the heat is transmitted to the anode and cathode cap covers through the anode and cathode current collecting discs by the insulating heat conducting piece, so that the heat in the battery can be effectively transmitted, the heat in the battery is uniformly distributed, the battery is prevented from being out of control due to the heat gathering in the battery, the heat in the battery can be transmitted to the shell, the temperature of the battery during working is reduced, and safety accidents are avoided.
Further optionally, the heat conducting coating 13 is a ceramic heat conducting coating, and the ceramic material has good insulation and heat conductivity, so that the heat conducting coating 13 can also conduct heat but not conduct electricity, and the safety performance of the battery is further improved.
Further optionally, an adhesion promoter layer is disposed between the heat conductive coating 13 and the expansion adhesive tape 12 for improving adhesion between the heat conductive coating 13 and the expansion adhesive tape 12 to prevent the heat conductive coating 13 from falling off during expansion of the expansion adhesive tape 12.
Further optionally, the center pin 1 is an insulated center pin, further avoiding short circuit inside the battery.
The present embodiment further provides a battery module, which includes a plurality of the above cylindrical lithium ion batteries, and the plurality of cylindrical lithium ion batteries are connected in parallel and/or in series. Since the battery module comprises the single cylindrical lithium ion battery, the battery module at least has the beneficial effects of the single cylindrical lithium ion battery, and repeated description is omitted here.
It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A cylindrical lithium ion battery, comprising:
a housing, which is cylindrical;
the battery cell is a winding battery cell and is arranged in the shell, the battery cell and the shell are coaxially arranged, and a containing cavity is formed in the center of the battery cell;
a central needle (1) inserted into the accommodating cavity along the axial direction of the battery core; the central needle (1) comprises a central needle body (11), an expansion adhesive tape (12) is arranged on the outer surface of the central needle body (11), and the expansion adhesive tape (12) can expand to fill a gap between the outer surface of the central needle body (11) and the wall of the accommodating cavity.
2. The cylindrical lithium ion battery according to claim 1, wherein the expansion rate of the expansion tape (12) is 50-100%.
3. The cylindrical lithium ion battery according to claim 2, characterized in that the ratio of the thickness of the expansion tape (12) to the diameter of the central needle body (11) is 1: (20-50).
4. The cylindrical lithium ion battery according to claim 1, wherein the expansion tape (12) is spirally wound around the outer circumference of the central needle body (11).
5. The cylindrical lithium ion battery of claim 1, wherein the casing comprises a positive electrode cap and a negative electrode cap which are arranged in sequence along an axial direction, a positive current collecting plate is arranged between the positive electrode cap and the battery core, a negative current collecting plate is arranged between the negative electrode cap and the battery core, one end of the central needle (1) is connected with the positive current collecting plate through a first insulating heat-conducting piece, and the other end of the central needle is connected with the negative current collecting plate through a second insulating heat-conducting piece.
6. The cylindrical lithium ion battery according to claim 5, characterized in that the outer layer of the expansion tape (12) is covered with a thermally conductive coating (13).
7. The cylindrical lithium ion battery according to claim 6, characterized in that the thermally conductive coating (13) is a ceramic thermally conductive coating.
8. The cylindrical lithium ion battery according to claim 7, characterized in that an adhesion promoter layer is provided between the thermally conductive coating (13) and the expansion tape (12).
9. The cylindrical lithium ion battery according to claim 8, characterized in that the central needle (1) is an insulated central needle.
10. A battery module, comprising the cylindrical lithium ion battery according to any one of claims 1 to 9, wherein a plurality of the cylindrical lithium ion batteries are arranged, and the plurality of the cylindrical lithium ion batteries are connected in series and/or in parallel with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023158790.6U CN214043758U (en) | 2020-12-24 | 2020-12-24 | Cylindrical lithium ion battery and battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023158790.6U CN214043758U (en) | 2020-12-24 | 2020-12-24 | Cylindrical lithium ion battery and battery module |
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| Publication Number | Publication Date |
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| CN214043758U true CN214043758U (en) | 2021-08-24 |
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| CN202023158790.6U Active CN214043758U (en) | 2020-12-24 | 2020-12-24 | Cylindrical lithium ion battery and battery module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859227A (en) * | 2022-05-16 | 2022-08-05 | 广东国光电子有限公司 | Battery expansion detection device and method |
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2020
- 2020-12-24 CN CN202023158790.6U patent/CN214043758U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859227A (en) * | 2022-05-16 | 2022-08-05 | 广东国光电子有限公司 | Battery expansion detection device and method |
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