CN212848494U - Battery positive plate and battery - Google Patents
Battery positive plate and battery Download PDFInfo
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- CN212848494U CN212848494U CN202022070845.1U CN202022070845U CN212848494U CN 212848494 U CN212848494 U CN 212848494U CN 202022070845 U CN202022070845 U CN 202022070845U CN 212848494 U CN212848494 U CN 212848494U
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- insulating
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- insulating tape
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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 application is suitable for the technical field of batteries, and provides a battery positive plate and a battery, wherein the battery positive plate comprises a positive plate provided with a groove; the tab comprises a welding area and a bending area, the welding area is arranged in the groove, and the bending area is arranged outside the groove; the insulating part comprises a first insulating adhesive tape attached to the bending area and a second insulating adhesive tape attached to the welding area, the width of the first insulating adhesive tape is larger than that of the tab, and the width of the first insulating adhesive tape is smaller than that of the second insulating adhesive tape. The application provides a battery positive plate, width through with first insulation sticky tape is greater than the width of utmost point ear, and the width of first insulation sticky tape is less than the width of second insulation sticky tape, like this, make the width of first insulation sticky tape can with the insulating piece cooperation at utmost point ear top, make things convenient for the insulating piece cover to establish on utmost point ear and first insulation sticky tape, the insulating sticky tape width of having avoided among the prior art utmost point ear bending region to bond is too wide, the problem on the utmost point ear is established to the difficult cover of insulating piece that makes utmost point ear top.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery positive plate and a battery.
Background
The positive plate of the cylindrical nickel-metal hydride battery and the nickel-cadmium battery consists of a positive plate, a tab and an insulating adhesive tape. The positive electrode plate is made by filling active substances into the matrix and on the surface of the matrix, a tab welding area is reserved on the positive electrode plate, the welding area is of an exposed foam nickel structure, burrs exist and can puncture a diaphragm, in addition, a welding point formed after tab welding and a tab cutting edge can puncture the diaphragm, and meanwhile, the tab is in short circuit risk due to the fact that the tab contacts the top of a negative electrode piece or the inner wall of a steel shell when being bent in a post process, so that the positive and negative surfaces of the tab welding area and the tab bending part need to be insulated and protected by using insulating adhesive tapes. However, the current insulating tapes are all rectangular in structure, so that the widths of the insulating tapes in the tab welding area and the tab bending area are the same, thus, for batteries with small inner diameters of steel shells such as 3A/4A/5A and the like and batteries with multi-tab structures, in order to meet the insulation requirement of a tab welding area, the width of an insulation tape adhered to the surface of a tab bending part is too wide, the insulating sheet on the top of the utility model is not easy to be sleeved into the pole ear and the insulating adhesive tape, which is easy to cause the problems of rework and potential safety hazard, in addition, in the gluing process, the gluing needle is easy to touch the insulating adhesive tape, the sealant is wrongly coated on the insulating adhesive tape, but not coated on the inner wall of the steel shell rolling groove, causing poor gluing, reduced battery sealing performance and poor alkali climbing, the insulating tape is narrowed, and the insulating requirement of a tab welding area can not be met, so that the problems that a diaphragm is pierced and the self discharge of the battery is large are caused.
Disclosure of Invention
An object of the embodiment of the application is to provide a battery positive plate, aims at solving among the prior art battery positive plate's insulating tape and is the rectangle, makes utmost point ear welding area and utmost point ear bending area's insulating tape width the same, leads to utmost point ear bending part surface-mounted's insulating tape width too wide, leads to the insulating piece at utmost point ear top to be difficult for emboliaing utmost point ear and insulating tape's technical problem easily.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a positive electrode sheet for a battery, comprising:
the positive pole plate is provided with a groove;
the tab comprises a welding area and a bending area, the welding area is arranged in the groove, and the bending area is arranged outside the groove;
the insulating part, the insulating part is located including pasting first insulating tape and the subsides in the region of buckling are located welding area's second insulating tape, the width of first insulating tape is greater than the width of utmost point ear, just the width of first insulating tape is less than the width of second insulating tape.
Further, the distance between the top of the first insulation tape and the top of the tab ranges from 1.5mm to 3.5 mm.
Further, the difference between the width of the first insulation tape and the width of the tab ranges from 0.5mm to 3 mm.
Further, the difference between the width of the second insulating tape and the width of the first insulating tape is greater than 1mm or equal to 1 mm.
Further, the bottom of the second insulating tape is disposed below the bottom of the welding area.
Further, the top of the second insulating tape is higher than the top of the welding area, and the difference between the top of the second insulating tape and the top of the welding area is greater than or equal to zero and less than 2 mm.
Further, the first insulating tape and the second insulating tape are both pressure-sensitive tapes or heat-sensitive tapes.
Further, the first insulating adhesive tape and the second insulating adhesive tape are integrally formed, and the longitudinal section of the insulating part consisting of the first insulating adhesive tape and the second insulating adhesive tape is in an inverted T shape; or
The first insulating adhesive tape and the second insulating adhesive tape are combined to form an inverted T shape.
Further, a welding material layer matched with the welding area is arranged in the groove.
Embodiments of the present application further provide a battery, which includes the positive electrode sheet of the battery described in any of the above embodiments.
The application provides a positive plate of battery's beneficial effect lies in: compared with the prior art, the battery positive plate has the advantages that the insulating part is composed of the first insulating adhesive tape and the second insulating adhesive tape, the first insulating adhesive tape is attached to the bending area of the pole lug, meanwhile, the second insulating adhesive tape is attached to the welding area of the pole lug, so that the width of the first insulating adhesive tape is larger than that of the pole lug, and the width of the first insulating adhesive tape is smaller than that of the second insulating adhesive tape, so that the width of the first insulating adhesive tape can be matched with an insulating sheet at the top of the lug, the insulating sheet is convenient to be sleeved on the lug and the first insulating adhesive tape, the problem that the insulating sheet at the top of the lug is difficult to sleeve the lug and the insulating adhesive tape due to the fact that the width of the welding area of the lug and the width of the insulating adhesive tape in the bending area in the prior art are the same to cause the width of the insulating adhesive tape for bonding the surface of the bending area of the lug is too wide is avoided, the insulating sheet at the top of the lug is not easy to sleeve.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a positive electrode plate of a battery provided by an embodiment of the present application;
fig. 2 is a schematic view of a positive plate of a battery provided by an embodiment of the present application;
fig. 3 is a schematic structural diagram of a positive plate of a battery according to another embodiment of the present application.
Reference numerals referred to in the above figures are detailed below:
100-a battery positive plate;
1-positive electrode plate; 2-pole ear; 3-an insulating part;
11-a groove;
21-a bending region; 22-a welding zone;
31-first insulating tape; 32-second insulating tape.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.
As shown in fig. 1 to 3, an embodiment of the present application provides a positive plate of a battery, including a positive plate 1, a tab 2, and an insulating portion 3, wherein the positive plate 1 is provided with a groove 11; the tab 2 comprises a welding area 22 and a bending area 21, the welding area 22 is arranged in the groove 11, and the bending area 21 is arranged outside the groove 11; the insulation part 3 includes a first insulation tape 31 attached to the bending region 21 and a second insulation tape 32 attached to the welding region 22, wherein the width of the first insulation tape 31 is greater than the width of the tab 2, and the width of the first insulation tape 31 is less than the width of the second insulation tape 32.
In the battery positive plate provided by the embodiment, the insulating part 3 is composed of the first insulating adhesive tape 31 and the second insulating adhesive tape 32, the first insulating adhesive tape 31 is attached to the bending region 21 of the tab 2, and the second insulating adhesive tape 32 is attached to the welding region 22 of the tab 2, so that the width of the first insulating adhesive tape 31 is greater than that of the tab 2, and the width of the first insulating adhesive tape 31 is smaller than that of the second insulating adhesive tape 32, thus the width of the first insulating adhesive tape 31 can be matched with the insulating sheet on the top of the tab 2, and the insulating sheet is conveniently sleeved on the tab 2 and the first insulating adhesive tape 31, thereby avoiding the problem that the width of the insulating adhesive tape adhered to the surface of the bending region 21 of the tab 2 is too wide due to the same width of the insulating adhesive tapes of the welding region 22 and the bending region 21 of the tab 2 in the prior art, and causing the problem that the tab 2 and the insulating adhesive tape, the insulation requirement of the battery is met, the reject ratio of the battery assembly workshop section is reduced, in addition, through the design of the insulation part 3, when the battery anode plate is assembled into the gluing process of the battery, the gluing needle head is not easy to touch the first insulation adhesive tape 31, and the problem that the sealant is mistakenly coated on the insulation adhesive tape can be avoided, so that the sealant is coated on the inner wall of the steel shell groove, the reject ratio of gluing is reduced, the sealing effect of the battery is ensured, and the reject ratio of alkali climbing is reduced.
In some embodiments of the present application, optionally, as shown in fig. 1 and 3, the first insulating tape 31 and the second insulating tape 32 are integrally formed, and the longitudinal section of the insulating part 3 composed of the first insulating tape 31 and the second insulating tape 32 is in an inverted T shape, that is, the first insulating tape 31 and the second insulating tape 32 form an inverted T-shaped insulating tape when attached to the tab 2, and can be formed by integrally forming the insulating tapes, or the first insulating tape 31 and the second insulating tape 32 form an inverted T shape, and at the same time, the second insulating tape 32 ensures insulation of the welding area 22 of the tab 2, the first insulating tape 31 ensures insulation of the bending area 21 of the tab 2, thereby avoiding that the insulating tapes in the prior art are rectangular, resulting in that the bending area 21 of the tab 2 and the insulating tape of the welding area 22 have the same bonding width, therefore, the insulating sheet at the top of the lug 2 is not easy to be sleeved in the lug 2 and the insulating adhesive tape, and the problems of rework and potential safety hazard are easily caused.
In some embodiments of the present application, alternatively, taking a 5A type nickel-hydrogen cylindrical battery as an example, the inner diameter of the steel shell of the nickel-hydrogen cylindrical battery is 6.45mm, the width of the positive electrode tab 2 is 2.5mm, and the width of the welding region 22 of the tab 2 is usually at least 4 mm; the width of the insulating tape is at least 5mm, here, the width of the second insulating tape 32 is set to be 5mm, after the positive electrode plate 1 is wound, the position of the positive electrode tab 2 in the steel shell is usually 5-5.3mm in chord length, that is, after winding, the width of the insulating tape in the bending area 21 of the tab 2 is required to be not more than 5mm, otherwise, the upper insulating top sheet and the glue coating are affected, and the width of the first insulating tape 31 is set to be 4 mm. Adopt the actual problem of this model production of solution that the type of falling T insulating tape of this application can be fine, also be exactly that insulating tape is the rectangle among the prior art, and the insulating tape that leads to utmost point ear 2's bending area 21 is the same with welding area 22's insulating tape bonding width to make the insulating piece at utmost point ear 2 top be difficult for emboliaing utmost point ear 2 and insulating tape's problem, and then cause the problem of doing over again and potential safety hazard easily.
In some embodiments of the present application, optionally, as shown in fig. 1 and 3, the distance between the top of the first insulation tape 31 and the top of the tab 2 ranges from 1.5mm to 3.5 mm.
In this embodiment, the height of the first insulating tape 31 adhered to the surface of the bending region 21 of the tab 2 is 1.5mm to 3.5mm lower than the top of the tab 2, so that the region for welding the positive electrode cap on the top of the tab 2 can be reserved, and the operation of manufacturing the battery in the subsequent process is facilitated.
In some embodiments of the present application, optionally, the difference between the width of the first insulation tape 31 and the width of the tab 2 ranges from 0.5mm to 3 mm.
In this embodiment, the width of the first insulating tape 31 adhered to the surface of the bending region 21 of the tab 2 is 0.5mm to 3mm wider than the width of the tab 2, so that the first insulating tape 31 can effectively wrap the bending region 21 of the tab 2, and the insulating effect of the bending region 21 of the tab 2 is ensured.
In some embodiments of the present application, optionally, a difference between a width of the second insulating tape 32 and a width of the first insulating tape 31 is greater than 1mm or equal to 1 mm.
In this embodiment, specifically, the width of the first insulating tape 31 attached to the surface of the bent region 21 of the tab 2 may be narrower than the width of the second insulating tape 32 attached to the surface of the welding region 22 of the tab 2 by more than 1mm, which may reduce the difficulty of the insulating sheet and glue application production on the top of the tab 2 and improve the quality of the battery.
In some embodiments of the present application, optionally, as shown in fig. 1 and 3, the bottom of the second insulating tape 32 is disposed below the bottom of the welding region 22.
In this embodiment, the bottom of the second insulating tape 32 pasted on the surface of the welding area 22 of the tab 2 exceeds the bottom of the welding area 22 of the tab 2, that is, the bottom of the second insulating tape 32 is located below the bottom of the welding area 22 of the tab 2, so that the second insulating tape 32 effectively covers the welding area 22 of the tab 2, completely wraps the bottom of the welding area 22, and the problem of membrane penetration is not easy to occur.
In the above embodiment of the present application, optionally, as shown in fig. 3, the top of the second insulating tape 32 is higher than the top of the welding region 22, and the difference between the top of the second insulating tape 32 and the top of the welding region 22 is greater than zero or equal to zero and less than 2 mm.
In this embodiment, the second insulating tape 32 adhered to the surface of the welding region 22 of the tab 2 may slightly exceed the top of the welding region 22 of the tab 2 by 0-2mm, so as to better perform insulation protection on the welding region 22 of the tab 2 in the thickness direction of the tab.
In some embodiments of the present application, optionally, the first insulating tape 31 and the second insulating tape 32 are both pressure-sensitive tapes or heat-sensitive tapes. Convenient operation and greatly improved production efficiency.
In some embodiments of the present application, optionally, a welding material layer is disposed in the groove 11 to match the welding area 22.
In this embodiment, a layer of welding material is provided in the groove 11 to facilitate the welding process of the welding zone 22 of the tab 2.
Embodiments of another aspect of the present application also provide a battery, which includes the positive electrode sheet of the battery described in any of the above embodiments.
The battery provided by an embodiment of another aspect of the present application has the positive electrode plate provided by any one of the above embodiments, and therefore, all the beneficial effects of the positive electrode plate provided by any one of the above embodiments are not repeated herein.
To sum up, the positive plate of battery that the embodiment of this application provided has: compared with the prior art, the battery positive plate provided by the embodiment has the advantages that the insulating part is composed of the first insulating adhesive tape and the second insulating adhesive tape, the first insulating adhesive tape is attached to the bending area of the tab, meanwhile, the second insulating adhesive tape is attached to the welding area of the tab, so that the width of the first insulating adhesive tape is larger than that of the tab, and the width of the first insulating adhesive tape is smaller than that of the second insulating adhesive tape, thus, the width of the first insulating adhesive tape can be matched with the insulating sheet at the top of the tab, the first insulating adhesive tape is conveniently sleeved on the tab and the first insulating adhesive tape, the problem that the insulating sheet at the top of the tab is not easy to sleeve the tab and the insulating adhesive tape due to the fact that the widths of the insulating adhesive tapes in the bending area of the tab are the same in the prior art is avoided, the insulating requirement of the battery is met, and the reject ratio of battery assembly sections is reduced, in addition, through the design of the insulating part, when the battery positive plate is assembled into a gluing process of the battery, the gluing needle head is not easy to touch the first insulating adhesive tape, and the problem that the sealant is mistakenly coated on the insulating adhesive tape can be avoided, so that the sealant is coated on the inner wall of the steel shell groove, the gluing reject ratio is reduced, the sealing effect of the battery is ensured, and the alkali-climbing reject ratio is reduced.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A positive electrode plate for a battery, comprising:
the positive pole plate is provided with a groove;
the tab comprises a welding area and a bending area, the welding area is arranged in the groove, and the bending area is arranged outside the groove;
the insulating part, the insulating part is located including pasting first insulating tape and the subsides in the region of buckling are located welding area's second insulating tape, the width of first insulating tape is greater than the width of utmost point ear, just the width of first insulating tape is less than the width of second insulating tape.
2. The positive electrode sheet for batteries according to claim 1, wherein the distance between the top of the first insulating tape and the top of the tab ranges from 1.5mm to 3.5 mm.
3. The positive electrode sheet for batteries according to claim 1, wherein the difference between the width of the first insulating tape and the width of the tab is in the range of 0.5mm to 3 mm.
4. The positive electrode sheet according to claim 1, wherein the difference between the width of the second insulating tape and the width of the first insulating tape is greater than 1mm or equal to 1 mm.
5. The positive electrode tab for a battery according to claim 1, wherein the bottom of the second insulating tape is disposed below the bottom of the welding region.
6. The positive electrode tab for a battery according to claim 5, wherein the top of the second insulating tape is higher than the top of the welding region, and the difference between the top of the second insulating tape and the top of the welding region is greater than zero or equal to zero and less than 2 mm.
7. The positive electrode sheet according to claim 1, wherein the first and second insulating tapes are both pressure-sensitive tapes or heat-sensitive tapes.
8. The positive electrode sheet according to claim 1, wherein the first insulating tape and the second insulating tape are integrally formed, and the insulating portion of the first insulating tape and the second insulating tape has an inverted T-shaped longitudinal section; or
The first insulating adhesive tape and the second insulating adhesive tape are combined to form an inverted T shape.
9. The positive electrode sheet according to claim 1, wherein a welding material layer is provided in the groove to fit the welding region.
10. A battery comprising the positive electrode sheet for a battery according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022070845.1U CN212848494U (en) | 2020-09-18 | 2020-09-18 | Battery positive plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022070845.1U CN212848494U (en) | 2020-09-18 | 2020-09-18 | Battery positive plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212848494U true CN212848494U (en) | 2021-03-30 |
Family
ID=75149499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022070845.1U Active CN212848494U (en) | 2020-09-18 | 2020-09-18 | Battery positive plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212848494U (en) |
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2020
- 2020-09-18 CN CN202022070845.1U patent/CN212848494U/en active Active
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