CN218351674U - Cylinder battery tab, cylinder battery pole piece and cylinder battery - Google Patents
Cylinder battery tab, cylinder battery pole piece and cylinder battery Download PDFInfo
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- CN218351674U CN218351674U CN202220617179.5U CN202220617179U CN218351674U CN 218351674 U CN218351674 U CN 218351674U CN 202220617179 U CN202220617179 U CN 202220617179U CN 218351674 U CN218351674 U CN 218351674U
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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 a cylinder battery utmost point ear, cylinder battery pole piece and cylinder battery, wherein, cylinder battery utmost point ear includes utmost point ear body, and utmost point ear body is formed through the cutting by the empty paper tinsel district of mass flow body, and the coating has utmost point ear coating. The utility model provides a pair of cylinder battery utmost point ear, cylinder battery pole piece and cylinder battery, through at the utmost point ear body coating of cutting the formation in the empty paper tinsel district by the mass flow body, not only can play certain supporting role, reduce the downward bending range of utmost point ear, thereby reduce utmost point ear and appear the possibility of reverse insertion phenomenon, moreover utmost point ear coated insulating ability makes even utmost point ear has appeared reverse insertion phenomenon also be unlikely to cause the short circuit risk, in addition, the thermal-insulated effect that utmost point ear coating played can prevent that the diaphragm is heated too high and the shrink appears when the welding, the security performance of electric core has been improved.
Description
Technical Field
The utility model relates to a utmost point ear technical field especially relates to a cylinder battery utmost point ear, cylinder battery pole piece and cylinder battery.
Background
The traditional cylindrical battery has a small number of positive and negative electrode lugs, the positive and negative electrode lugs are external lugs and are respectively welded and led out with a positive plate and a negative plate, and the pole pieces are free of lugs. 4680 the cylindrical battery as a new type of cylindrical battery, the process design of the whole pole ear is adopted, namely a plurality of positive and negative pole ears are respectively cut out from the positive and negative pole pieces directly, and the power of the cylindrical battery is further improved by improving the contact area of the pole ears. However, the foil used by the cylindrical battery is thin in thickness and soft in texture, so that when the tabs are collected, the positive and negative tabs cut from the positive and negative plates are not supported and are easy to bend downwards to cause reverse insertion, and further the positive and negative tabs are likely to be in contact with the battery core, so that the risk of short circuit exists.
Therefore, it is required to improve the tab of the cylindrical battery to solve the above problems of the prior art, thereby increasing the applicability thereof.
The above information is given as background information only to aid in understanding the present disclosure, and does not establish or acknowledge whether any of the above is available as prior art to the present disclosure.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cylinder battery tab, cylinder battery pole piece and cylinder battery to solve the not enough of prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a cylindrical battery tab, including tab body 1, tab body 1 is formed by cutting the empty foil area of current collector 2, the coating has tab coating 3 on tab body 1.
Furthermore, in the cylindrical battery tab, the tab coating 3 is formed by mixing alumina, a binder and an insulating glue.
Further, in the cylindrical battery tab, the tab coating 3 is located on one surface of the tab body 1.
Further, in the cylindrical battery tab, the tab coating (3) is positioned on two surfaces of the tab body (1);
a blank area is left on one surface, far away from the battery cell, of the tab body (1).
Furthermore, in the cylindrical battery tab, the width of the blank area is 3-5mm.
In a second aspect, an embodiment of the present invention provides a cylindrical battery pole piece, including a current collector 2, a polar material coating 4, and a cylindrical battery tab as described in the first aspect above;
the polar material coating 4 is coated on the surface of the current collector 2;
a hollow foil area which is not coated with the polar material coating 4 is reserved at one end of the current collector 2 in the width direction;
the empty foil region is formed with the cylindrical battery tab by cutting.
Further, in the cylindrical battery pole piece, the polar material coating 4 is coated on two surfaces of the current collector 2 and/or one surface of the two surfaces of the current collector 2.
In a third aspect, an embodiment of the present invention provides a cylindrical battery, including an electrical core, where the electrical core includes a positive plate, a negative plate, and a diaphragm that separates the positive plate and the negative plate; wherein, the first and the second end of the pipe are connected with each other,
the positive plate and the negative plate are cylindrical battery plates as described in the second aspect.
Furthermore, in the cylindrical battery, the pole lug body (1) which is positioned on a plurality of circles of the outermost battery cores is not coated with the pole lug coating (3).
Furthermore, in the cylindrical battery, the tab body (1) positioned at the outermost 1-5 circles of the battery cell is not coated with the tab coating (3).
An embodiment of the utility model provides a pair of cylinder battery tab, cylinder battery pole piece and cylinder battery, through coating utmost point ear coating on the utmost point ear body that the empty paper tinsel district cutting formed by the mass flow body, not only can play certain supporting role, reduce the downward bending range of utmost point ear, thereby reduce utmost point ear the possibility of phenomenon of inserting backward appears, and utmost point ear coating's insulating ability makes even utmost point ear the phenomenon of inserting backward has appeared and also not just cause the short circuit risk, in addition, the thermal-insulated effect that utmost point ear coating played can prevent that the diaphragm is heated too high and the shrink appears when the welding, the security performance of electric core has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic front view illustrating a structure of a cylindrical battery tab according to a first embodiment of the present invention;
fig. 2 is a schematic side view illustrating a structure of a cylindrical battery tab according to an embodiment of the present invention;
fig. 3 is a schematic front view of a cylindrical battery pole piece (without a polar material coating) provided in an embodiment of the present invention;
fig. 4 is a schematic structural side view of a cylindrical battery pole piece (not coated with a polar material coating) according to an embodiment of the present invention;
fig. 5 is a schematic front view of a cylindrical battery pole piece (coated with a polar material coating) according to a second embodiment of the present invention;
fig. 6 is a schematic side view of a structure of a cylindrical battery pole piece (coated with a polar material coating layer) according to an embodiment of the present invention.
Reference numerals:
the electrode tab comprises an electrode tab body 1, a current collector 2, an electrode tab coating 3 and a polar material coating 4.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. 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.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example one
In view of the above-mentioned defects of the full tab structure of the existing cylindrical battery, the applicant is based on practical experience and professional knowledge that such products are designed and manufactured for many years, and cooperates with the application of theory to actively research and innovate, so as to create a cylindrical battery with a novel full tab structure, and make it more practical. Through continuous research and design, and after repeated trial sample and improvement, the utility model discloses the practical value of utensil is established in the end.
Referring to fig. 1-2, an embodiment of the present invention provides a cylindrical battery tab, including a tab body 1, where the tab body 1 is formed by cutting an empty foil area of a current collector 2, and a tab coating 3 is coated on the tab body 1;
the tab coating 3 is formed by mixing alumina, a binder and an insulating glue.
The material of the current collector 2 may be set according to actual needs, and is not further limited herein. For example, the current collector 2 in the positive electrode sheet may be an aluminum foil, and the current collector 2 in the negative electrode sheet may be a copper foil.
The cylindrical battery in the embodiment is a 4680 cylindrical battery, and a process design of a full tab is adopted, that is, the tab body 1 is formed by cutting a hollow foil area of the current collector 2, and current collection is realized by using the current collector 2, so that current distribution inside the battery is more uniform, the current conduction area is multiplied, and the current conduction distance is shortened, thereby greatly reducing the internal resistance of the battery, reducing the heat productivity, prolonging the service life of the battery, and improving the charge and discharge peak power, however, as mentioned in the background art, the full tab structure of the existing 4680 cylindrical battery has the problems of tab reverse insertion and diaphragm thermal shrinkage in the process of welding the tab with a current collecting disc or a shell, so that the embodiment is improved from the aspect of the production process of the tab body 1, and the tab coating 3 formed by mixing alumina, a binder and an insulating glue is coated on the tab body 1, and the presence of the tab coating 3 can play a certain role in manufacturing the tab body 1, thereby reducing the downward bending amplitude of the tab, and reducing the possibility of the reverse insertion phenomenon of the tab. In the tab coating 3, alumina is used as a common refractory material, and if the common refractory material is coated on the tab body 1, a certain heat insulation effect can be achieved, so that in the process of welding the tab body 1 and a current collecting disc or a shell, the alumina can prevent a diaphragm from shrinking due to overhigh heating, thereby preventing a cell from short circuit and improving the safety performance of the cell; and the insulating glue coating then can play certain insulating effect on utmost point ear body 1, even utmost point ear body 1 has appeared the phenomenon of inserting upside down like this, also can completely cut off the contact of utmost point ear body 1 and electric core to be unlikely to cause the short circuit risk, further improved the security performance of electric core.
In the present embodiment, there are many coating embodiments for the tab coating layer 3, and the coating embodiments are not limited to one, but two of them will be described in detail for the purpose of better understanding of the present embodiment.
In the first embodiment, the tab coating layer 3 is provided on one surface of the tab body 1.
Note that the surface coated with the tab coating 3 is a surface of the tab body 1 facing or close to the battery cell. Because one surface of the tab body 1 faces the battery cell and the other surface faces the current collecting disc or the casing when the current 4680 cylindrical battery collects the tab, only the surface facing the battery cell on the tab body 1 has the risk of contacting with the battery cell, that is, only the surface facing the battery cell needs to be coated with the tab coating 3, and the surface facing the current collecting disc or the casing does not need to be coated with the tab coating 3. The present embodiment is exemplarily illustrated in such an embodiment.
In the second embodiment, the tab coating layer 3 is located on both surfaces of the tab body 1;
a blank area is left on one surface of the tab body 1, which is far away from the battery core.
In the present embodiment, compared to the first embodiment, the tab coating 3 is uniformly coated on both the surface of the tab body 1 close to the battery cell and the surface of the tab body far from the battery cell, so as to further improve the safety performance of the tab body 1 in use, but since the surface of the tab body 1 far from the battery cell (i.e., the surface facing the current collecting plate or the casing) needs to be welded to the current collecting plate or the casing, a blank area needs to be left for welding to the current collecting plate or the casing.
Preferably, the width of the blank area is 3-5mm. Of course, the width setting value of the blank area can also be adjusted according to specific requirements.
Although terms such as tab body, current collector, tab coating, polar material coating, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
The embodiment of the utility model provides a pair of cylinder battery tab, through coating on the utmost point ear body that the cutting of the empty paper tinsel district formed by the mass flow body by aluminium oxide, the utmost point ear coating that binder and insulating glue mix and form, not only can play certain supporting role, reduce the downward bending amplitude of utmost point ear, thereby reduce utmost point ear and appear the possibility of reverse insertion phenomenon, and insulating gluey insulating ability makes even utmost point ear has appeared reverse insertion phenomenon and also be unlikely to cause the short circuit risk, in addition, the thermal-insulated effect that aluminium oxide played can prevent that the diaphragm is heated too high and the shrink appears when the welding, the security performance of electric core has been improved.
Example two
Referring to fig. 3-6, an embodiment of the present invention provides a cylindrical battery electrode plate, including a current collector 2, a polar material coating 4, and a cylindrical battery tab according to the first embodiment;
the polar material coating 4 is coated on the surface of the current collector 2;
a hollow foil area which is not coated with the polar material coating 4 is reserved at one end of the current collector 2 in the width direction;
the empty foil region is formed with the cylindrical battery tab by cutting.
The type and ratio of the active material in the polar material coating layer 4 in the negative electrode sheet and the positive electrode sheet may be set according to actual needs, and are not further limited herein. For example, the active material in the polar material coating 4 in the negative electrode sheet may include graphite, hard carbon, silicon monoxide, etc., and the active material in the polar material coating 4 in the positive electrode sheet may include lithium cobaltate, lithium iron phosphate, lithium manganate, etc.
Since the tab of the 4680 cylindrical battery is cut directly from the current collector 2, a blank foil area on the current collector 2 is required to be left, in which the tab can be cut, and the blank foil area is not required to be coated with the polar material coating 4, and in particular, the blank foil area is located at one end of the current collector 2 in the width direction.
In the present embodiment, the polar material coating 4 is coated on both surfaces of the current collector 2 and/or one of both surfaces of the current collector 2.
The embodiment of the utility model provides a pair of cylindrical battery pole piece, through coating on the utmost point ear body that the cutting of the empty paper tinsel district formed by the mass flow body by aluminium oxide, the utmost point ear coating that binder and insulating glue mix and form, not only can play certain supporting role, reduce the downward bending amplitude of utmost point ear, thereby reduce utmost point ear and appear the possibility of reverse insertion phenomenon, and insulating gluey insulating ability makes even utmost point ear has appeared reverse insertion phenomenon and also be unlikely to cause the short circuit risk, in addition, the thermal-insulated effect that aluminium oxide played can prevent that the diaphragm is heated too high and the shrink appears when the welding, the security performance of electric core has been improved.
EXAMPLE III
The embodiment of the utility model provides a cylindrical battery, which comprises an electric core, wherein the electric core comprises a positive plate, a negative plate and a diaphragm which separates the positive plate and the negative plate; wherein the content of the first and second substances,
the positive plate and the negative plate are cylindrical battery plates as described in the second embodiment.
It should be noted that, the cylindrical battery further includes an encapsulating case, the battery core is accommodated in the encapsulating case, and the encapsulating case is filled with the electrolyte, and in view of that these designs are implemented in the prior art and are not the focus of the design of this solution, further description is not made here.
In the embodiment, the tab body (1) which is positioned at the outermost circles of the battery cells is not coated with the tab coating (3).
It should be noted that, considering that the possibility of the occurrence of the risk of contact with the battery cell during the collection of the tab is low in the outermost circles of the battery cell, the present embodiment defines that the tab body (1) of the outermost circles of the battery cell is not coated with the tab coating (3).
Preferably, the tab body (1) located at the outermost 1-5 circles of the battery cell is not coated with the tab coating (3). Of course, the specific setting values of the outermost several turns can also be adjusted according to specific requirements.
The embodiment of the utility model provides a pair of cylindrical battery, through coating on the utmost point ear body that the cutting of the empty paper tinsel district formed by the mass flow body by aluminium oxide, the utmost point ear coating that binder and insulating glue mix and form, not only can play certain supporting role, reduce the downward bending range of utmost point ear, thereby reduce utmost point ear and appear the possibility of reverse insertion phenomenon, and insulating glue's insulating ability makes even utmost point ear has appeared reverse insertion phenomenon and also be unlikely to cause the short circuit risk, in addition, the thermal-insulated effect that aluminium oxide played can prevent that the diaphragm is heated too high and the shrink appears when the welding, the security performance of electric core has been improved.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also be varied in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly stated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on … …," "engaged with … …," "connected to," or "coupled to" another element or layer, it can be directly on, engaged with, connected to, or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," etc., may be used herein for ease of description to describe the relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" may encompass both an orientation of facing up and facing down. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.
Claims (9)
1. The utility model provides a cylinder battery tab, includes utmost point ear body (1), utmost point ear body (1) is formed through the cutting by the empty paper tinsel district of mass flow body (2), its characterized in that, the coating has utmost point ear coating (3) on utmost point ear body (1).
2. The cylindrical battery tab as claimed in claim 1, wherein the tab coating (3) is located on one surface of the tab body (1).
3. The cylindrical battery tab as claimed in claim 1, wherein the tab coating (3) is located on both surfaces of the tab body (1);
a blank area is left on one surface, far away from the battery cell, of the tab body (1).
4. The cylindrical battery tab as claimed in claim 3, wherein the blank space has a width of 3-5mm.
5. A cylindrical battery pole piece, characterized by comprising a current collector (2), a polar material coating (4) and a cylindrical battery tab according to any one of claims 1 to 4;
the polar material coating (4) is coated on the surface of the current collector (2);
one end of the current collector (2) in the width direction is provided with a hollow foil area which is not coated with the polar material coating (4);
the empty foil area is formed with the cylindrical battery tab by cutting.
6. The cylindrical battery pole piece according to claim 5, characterized in that the coating of polar material (4) is applied on both surfaces of the current collector (2) and/or on one of the two surfaces of the current collector (2).
7. A cylindrical battery comprises a battery cell, and is characterized in that the battery cell comprises a positive plate, a negative plate and a diaphragm for spacing the positive plate and the negative plate; wherein the content of the first and second substances,
the positive plate and the negative plate are the cylindrical battery plate as claimed in any one of claims 5 to 6.
8. The cylindrical battery as claimed in claim 7, wherein the tab body (1) located at the outermost circles of the cells is not coated with the tab coating (3).
9. The cylindrical battery as claimed in claim 8, wherein the tab body (1) located at the outermost 1-5 circles of the cell is not coated with the tab coating (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220617179.5U CN218351674U (en) | 2022-03-21 | 2022-03-21 | Cylinder battery tab, cylinder battery pole piece and cylinder battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220617179.5U CN218351674U (en) | 2022-03-21 | 2022-03-21 | Cylinder battery tab, cylinder battery pole piece and cylinder battery |
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| CN218351674U true CN218351674U (en) | 2023-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014083A (en) * | 2023-02-16 | 2023-04-25 | 江苏正力新能电池技术有限公司 | Manufacturing process of lithium ion battery capable of preventing tab from being reversely inserted and lithium ion battery |
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2022
- 2022-03-21 CN CN202220617179.5U patent/CN218351674U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014083A (en) * | 2023-02-16 | 2023-04-25 | 江苏正力新能电池技术有限公司 | Manufacturing process of lithium ion battery capable of preventing tab from being reversely inserted and lithium ion battery |
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