CN211980765U - Battery structure and electronic equipment - Google Patents

Battery structure and electronic equipment Download PDF

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Publication number
CN211980765U
CN211980765U CN202020953044.7U CN202020953044U CN211980765U CN 211980765 U CN211980765 U CN 211980765U CN 202020953044 U CN202020953044 U CN 202020953044U CN 211980765 U CN211980765 U CN 211980765U
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China
Prior art keywords
groove
pole piece
insulating layer
insulating
battery structure
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CN202020953044.7U
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Chinese (zh)
Inventor
谢斌
朱玉琪
彭宁
徐腾飞
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Zhuhai Cosmx Battery Co Ltd
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Zhuhai Cosmx Battery Co Ltd
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Priority to CN202020953044.7U priority Critical patent/CN211980765U/en
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Publication of CN211980765U publication Critical patent/CN211980765U/en
Priority to KR1020227041022A priority patent/KR20230008141A/en
Priority to JP2022569200A priority patent/JP7528262B2/en
Priority to PCT/CN2021/091517 priority patent/WO2021227896A1/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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Abstract

The utility model provides a battery structure and electronic equipment, this battery structure includes: the device comprises a first pole piece, a second pole piece, a first pole lug and an insulating diaphragm; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound; the first pole piece comprises a first current collector, wherein first active material layers are arranged on the upper surface and the lower surface of the first current collector respectively, a first groove and a second groove are formed in the first active material layers, and the first groove and the second groove are arranged oppositely and are respectively located on the upper surface and the lower surface of the first current collector; the first tab is welded at the first groove, at least two layers of insulating layers are covered at the first groove, and at least one layer of insulating layer is covered at the second groove where the tab is not welded. The embodiment of the utility model provides a can improve the security of battery structure.

Description

Battery structure and electronic equipment
Technical Field
The utility model relates to a battery technology field, in particular to battery structure and electronic equipment.
Background
Along with social development, lithium batteries are widely applied to daily electronic products such as mobile phones, computers, Bluetooth headsets, sports watches and the like, occupy more and more important positions in the market, and have higher and higher requirements on the performances such as safety of the lithium batteries in the market.
In the existing battery structure, a first welding mark is formed at the welding position of a first pole piece and a first pole lug, and a first insulating layer and a second insulating layer in the first pole piece respectively cover the first welding mark on two different surfaces. The first pole piece and the second pole piece are arranged in a winding mode, a third insulating layer and a fourth insulating layer are arranged in the second pole piece, and the third insulating layer and the fourth insulating layer cover two different surfaces of the first welding mark respectively. The size of the third insulating layer does not exceed the size of the first insulating layer, and the size of the fourth insulating layer does not exceed the size of the second insulating layer. The first insulating layer, the second insulating layer, the third insulating layer and the fourth insulating layer satisfy preset stricter position alignment and size relations. In the preparation process of the battery, the risk of short circuit in the battery is easily caused by the accumulated error of the size and the position of the insulating layer, and the safety of the battery structure is low.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a battery structure and electronic equipment to solve the lower problem of security of battery structure.
In order to achieve the above object, an embodiment of the present invention provides a battery structure, including: the device comprises a first pole piece, a second pole piece, a first pole lug and an insulating diaphragm; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound; the first pole piece comprises a first current collector, wherein first active material layers are arranged on the upper surface and the lower surface of the first current collector respectively, a first groove and a second groove are formed in the first active material layers, and the first groove and the second groove are arranged oppositely and are respectively located on the upper surface and the lower surface of the first current collector; the first tab is welded at the first groove, at least two layers of insulating layers are covered at the first groove, and at least one layer of insulating layer is covered at the second groove where the tab is not welded.
Optionally, the second groove is covered with an insulating layer, and at least one insulating layer is disposed in a region of the second pole piece opposite to the second groove.
Optionally, the length and/or width of the insulating layer in the region of the second pole piece opposite to the second groove is not greater than the corresponding length and/or width of the insulating layer at the second groove.
Optionally, the second groove is covered by at least two insulating layers.
Optionally, a part or all of the at least two insulating layers at the first groove covers the first groove.
Optionally, the second electrode plate includes a second current collector, a second active material layer is disposed on both an upper surface and a lower surface of the second current collector, a third groove and a fourth groove are disposed on the second active material layer, and the third groove and the fourth groove are disposed oppositely and located on the upper surface and the lower surface of the second current collector respectively; the welding of third recess department has the second utmost point ear, the third recess with fourth recess department all is covered a layer of insulating layer, set up a layer of insulating layer in the first pole piece with the region that the third recess is relative, set up a layer of insulating layer in the first pole piece with the region that the fourth recess is relative.
Optionally, the first groove, the second groove, the third groove, the fourth groove and the insulating layer are square, and the insulating layer is adhesive paper.
Optionally, the length and/or width of the insulating layer in the region of the first pole piece opposite to the third groove is not greater than the corresponding length and/or width of the insulating layer at the third groove, and the length and/or width of the insulating layer in the region of the first pole piece opposite to the fourth groove is not greater than the corresponding length and/or width of the insulating layer at the fourth groove.
The embodiment of the utility model provides an electronic equipment is still provided, a serial communication port, electronic equipment includes the embodiment of the utility model provides a battery structure.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the utility model, because the battery structure includes: the device comprises a first pole piece, a second pole piece, a first pole lug and an insulating diaphragm; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound; the first pole piece comprises a first current collector, wherein first active material layers are arranged on the upper surface and the lower surface of the first current collector respectively, a first groove and a second groove are formed in the first active material layers, and the first groove and the second groove are arranged oppositely and are respectively located on the upper surface and the lower surface of the first current collector; the first tab is welded at the first groove, at least two layers of insulating layers are covered at the first groove, and at least one layer of insulating layer is covered at the second groove where the tab is not welded. Compare like this and cover the third insulating layer and the fourth insulating layer of first welding seal among the prior art and set up on the second pole piece, and easily bring the inside short circuit risk of battery because of the accumulative error of insulating layer size and position, the embodiment of the utility model provides a can improve the security of battery structure.
Drawings
Fig. 1 is a schematic view of an upper surface of a first pole piece according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a first pole piece according to an embodiment of the present invention;
fig. 3 is a schematic view of a winding core provided by an embodiment of the present invention;
fig. 4 is a schematic view of an upper surface of a second pole piece according to an embodiment of the present invention;
fig. 5 is a schematic view of another first pole piece according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The battery structure includes: a first pole piece 11, a second pole piece 12, a first pole tab 111 and an insulating diaphragm; the first pole piece 11, the insulating diaphragm and the second pole piece 12 are sequentially stacked and wound; the first pole piece 11 comprises a first current collector, wherein a first active material layer is arranged on the upper surface and the lower surface of the first current collector, a first groove 112 and a second groove are arranged on the first active material layer, and the first groove 112 and the second groove are oppositely arranged and are respectively positioned on the upper surface and the lower surface of the first current collector; the first tab 111 is welded to the first groove 112, the first groove 112 is covered with at least two layers of insulating layers, and the second groove, to which no tab is welded, is covered with at least one layer of insulating layer.
In an embodiment of the present invention, the first groove 112 is located on the upper surface of the first current collector, the active material is removed from the area of the first groove, and the bottom of the first groove is the first current collector. The second recess is located the lower surface of first mass flow body, active material has been rejected in the region of second recess, just the bottom of second recess is first mass flow body. The first groove 112 is opposite the second pole piece 12, and the second groove is opposite the second pole piece. The first pole piece 11 is generally referred to as a positive pole piece in a battery structure, and the second pole piece 12 is generally referred to as a negative pole piece in a battery structure.
The first groove 112 is covered with at least two layers of insulating layers, and the at least two layers of insulating layers are used for process fool-proofing. When one of the insulating layers is not pasted according to the preset standard, the insulating layer pasting equipment can detect the irregular pasting of the first insulating layer when pasting the second insulating layer, and the correction is carried out in time. When one of the insulating layers is not attached or falls off, the first groove 112 is further covered by at least one other insulating layer. This improves the safety and reliability of the battery structure, and the first groove 112 is covered more tightly and more securely. The equipment is more simply established in insulating layer subsides, and equipment maintenance is simpler and easier.
The first groove 112 is covered by two insulating layers, which are a first insulating sublayer and a second insulating sublayer, the size of the first insulating sublayer may be larger than or smaller than that of the second insulating sublayer, and the size of the first insulating sublayer may also be equal to that of the second insulating sublayer, which is not limited in the embodiments of the present invention, as long as the first insulating sublayer or the second insulating sublayer can completely cover the first groove 112. Therefore, the setting of the size and the position relation between the insulating layers is looser, the accumulated error caused by stricter position alignment and the size relation is avoided, the risk of short circuit inside the battery is reduced, the safety of the battery structure is higher, and the consistency and the stability of the battery core are higher; the insulating layer can be sized smaller to increase cell energy density.
In an alternative embodiment, the second groove is covered with an insulating layer, and at least one insulating layer is disposed in a region of the second pole piece 12 opposite to the second groove.
The second groove is opposite to the second pole piece 12, one of the insulating layers covering the second groove is located on the first pole piece 11, and the other insulating layer covering the second groove is located on the second pole piece 12.
As an alternative embodiment, the length and/or width of the insulating layer in the region of the second pole piece 12 opposite to the second groove is not greater than the corresponding length and/or width of the insulating layer at the second groove.
This embodiment reduces the possibility of lithium deposition in the battery and improves the safety of the battery structure.
As an alternative embodiment, the second groove is covered with at least two insulating layers.
In this embodiment, the first groove 112 is covered with at least two insulating layers, the second groove where no tab is welded is covered with at least two insulating layers, and the insulating layers covering the first groove 112 and the second groove are 113 as shown in fig. 2 or fig. 3, and are both located on the first pole piece 11. Similarly, the setting of the size and the position relation between the insulating layers at the second groove is looser, so that the accumulated error caused by strict position alignment and size relation is avoided, the risk of short circuit inside the battery is reduced, and the consistency of the battery core is higher. This embodiment reduces the risk of the tabs piercing the insulation layer, resulting in internal shorting of the battery.
As an alternative embodiment, a part or all of the at least two insulating layers at the first groove 112 cover the first groove 112.
In this embodiment, a part of the at least two insulating layers in the first groove 112 covers the first groove 112, and the energy density of the battery structure is high. Or all of the at least two insulation layers at the first groove 112 cover the first groove 112, and the first groove 112 is covered more tightly and more firmly.
As an alternative embodiment, the second electrode sheet 12 includes a second current collector, a second active material layer is disposed on each of the upper surface and the lower surface of the second current collector, a third groove 121 and a fourth groove are disposed on the second active material layer, the third groove 121 and the fourth groove are disposed opposite to each other and are respectively located on the upper surface and the lower surface of the second current collector; a second tab 122 is welded at the third groove 121, a layer of insulating layer covers the third groove 121 and the fourth groove, a layer of insulating layer is arranged in the region of the first pole piece 11 opposite to the third groove 121, and a layer of insulating layer is arranged in the region of the first pole piece 11 opposite to the fourth groove.
The first current collector and the second current collector may have the same composition, and the first active material layer and the second active material layer may have the same composition. The third groove 121 is located on the upper surface of the second current collector, active materials are removed from the area of the third groove 121, and the bottom of the third groove 121 is the second current collector. The fourth groove is located on the lower surface of the second current collector, active substances are removed from the area of the fourth groove, and the bottom of the fourth groove is the second current collector. The third groove 121 is opposite to the first pole piece 11, and the fourth groove is opposite to the first pole piece 11.
The third recess 121 and the fourth recess are covered by an insulating layer, indicated by 123 in fig. 3. An insulating layer is disposed in a region of the first pole piece 11 opposite to the third groove 121, and an insulating layer is disposed in a region of the first pole piece 11 opposite to the fourth groove, as indicated by 114 in fig. 3 or fig. 5. One of the insulating layers covering the third groove 121 is located on the second pole piece 12, and the other insulating layer covering the third groove 121 is located on the first pole piece 11. One of the insulating layers covering the fourth groove is located on the second pole piece 12, and the other insulating layer covering the fourth groove is located on the first pole piece 11.
As an optional implementation manner, the first groove 112, the second groove, the third groove 121, the fourth groove, and the insulating layer are all square, and the insulating layer is adhesive paper.
In this embodiment, because first recess 112, the second recess, third recess 121 the fourth recess and the insulating layer is square, makes things convenient for the cover of recess, reduces the adhesive tape and pastes and establish the degree of difficulty, improves the accuracy that the recess covered, improves the security of battery.
As an alternative embodiment, the length and/or width of the insulating layer in the region of the first pole piece 11 opposite to the third groove 121 is not greater than the corresponding length and/or width of the insulating layer at the third groove 121, and the length and/or width of the insulating layer in the region of the first pole piece 11 opposite to the fourth groove is not greater than the corresponding length and/or width of the insulating layer at the fourth groove.
This embodiment reduces the possibility of lithium deposition in the battery and improves the safety of the battery structure. When the insulating layer of recess department all was located self pole piece, the size and the setting of position relation between the insulating layer are comparatively loose. When the insulating layers at the grooves are respectively positioned on different pole pieces, the size and the position relation among the insulating layers are strictly set.
115 marked in fig. 1, 113 marked in fig. 2, 113, 114 and 123 marked in fig. 3, 124 marked in fig. 4 and 114 marked in fig. 5 are all insulating layers.
In an embodiment of the present invention, the battery structure includes: a first pole piece 11, a second pole piece 12, a first pole tab 111 and an insulating diaphragm; the first pole piece 11, the insulating diaphragm and the second pole piece 12 are sequentially stacked and wound; the first pole piece 11 comprises a first current collector, wherein a first active material layer is arranged on the upper surface and the lower surface of the first current collector, a first groove 112 and a second groove are arranged on the first active material layer, and the first groove 112 and the second groove are oppositely arranged and are respectively positioned on the upper surface and the lower surface of the first current collector; the first tab 111 is welded to the first groove 112, the first groove 112 is covered with at least two layers of insulating layers, and the second groove, to which no tab is welded, is covered with at least one layer of insulating layer. Compare like this and cover the third insulating layer and the fourth insulating layer of first welding seal among the prior art and set up on the second pole piece, and easily bring the inside short circuit risk of battery because of the accumulative error of insulating layer size and position, the embodiment of the utility model provides a can improve the security of battery structure.
Additionally, the embodiment of the present invention provides an electronic device including the battery structure of any implementation manner.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A battery structure, comprising: the device comprises a first pole piece, a second pole piece, a first pole lug and an insulating diaphragm; the first pole piece, the insulating diaphragm and the second pole piece are sequentially stacked and wound;
the first pole piece comprises a first current collector, wherein first active material layers are arranged on the upper surface and the lower surface of the first current collector respectively, a first groove and a second groove are formed in the first active material layers, and the first groove and the second groove are arranged oppositely and are respectively located on the upper surface and the lower surface of the first current collector; the first tab is welded at the first groove, at least two layers of insulating layers are covered at the first groove, and at least one layer of insulating layer is covered at the second groove where the tab is not welded.
2. The battery structure of claim 1, wherein the second groove is covered with an insulating layer, and wherein at least one insulating layer is disposed in a region of the second pole piece opposite the second groove.
3. The battery structure of claim 2, wherein a length and/or width of the insulating layer in a region of the second pole piece opposite the second groove is no greater than a corresponding length and/or width of the insulating layer at the second groove.
4. The battery structure of claim 1, wherein the second recess is covered with at least two insulating layers.
5. The battery structure of claim 1, wherein at least some or all of the two insulating layers at the first recess cover the first recess.
6. The battery structure of claim 1, wherein the second electrode plate comprises a second current collector, wherein a second active material layer is disposed on each of an upper surface and a lower surface of the second current collector, a third groove and a fourth groove are disposed on the second active material layer, and the third groove and the fourth groove are disposed opposite to each other and are respectively disposed on the upper surface and the lower surface of the second current collector;
the welding of third recess department has the second utmost point ear, the third recess with fourth recess department all is covered a layer of insulating layer, set up a layer of insulating layer in the first pole piece with the region that the third recess is relative, set up a layer of insulating layer in the first pole piece with the region that the fourth recess is relative.
7. The battery structure of claim 6, wherein the first groove, the second groove, the third groove, the fourth groove, and the insulating layer are square, and the insulating layer is adhesive paper.
8. The battery structure of claim 6, wherein a length and/or width of the insulating layer in a region of the first pole piece opposite the third groove is no greater than a corresponding length and/or width of the insulating layer at the third groove, and a length and/or width of the insulating layer in a region of the first pole piece opposite the fourth groove is no greater than a corresponding length and/or width of the insulating layer at the fourth groove.
9. An electronic device, characterized in that the electronic device comprises a battery structure according to any of claims 1-8.
CN202020953044.7U 2020-05-11 2020-05-29 Battery structure and electronic equipment Active CN211980765U (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202020953044.7U CN211980765U (en) 2020-05-29 2020-05-29 Battery structure and electronic equipment
KR1020227041022A KR20230008141A (en) 2020-05-11 2021-04-30 batteries and electronics
JP2022569200A JP7528262B2 (en) 2020-05-11 2021-04-30 Batteries and electronic devices
PCT/CN2021/091517 WO2021227896A1 (en) 2020-05-11 2021-04-30 Battery and electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020953044.7U CN211980765U (en) 2020-05-29 2020-05-29 Battery structure and electronic equipment

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CN211980765U true CN211980765U (en) 2020-11-20

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113381058A (en) * 2021-06-09 2021-09-10 珠海冠宇电池股份有限公司 Lithium ion battery
WO2021227896A1 (en) * 2020-05-11 2021-11-18 珠海冠宇电池股份有限公司 Battery and electronic device
CN114188501A (en) * 2021-11-23 2022-03-15 宁德新能源科技有限公司 Electrochemical device and electronic device
CN115458879A (en) * 2022-09-28 2022-12-09 惠州锂威新能源科技有限公司 Battery cell and battery cell manufacturing method
WO2023279257A1 (en) * 2021-07-06 2023-01-12 宁德新能源科技有限公司 Electrochemical device and electronic device
US12087914B2 (en) 2020-05-11 2024-09-10 Zhuhai Cosmx Battery Co., Ltd. Wound-type cell and preparation method thereof, battery and electronic product

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021227896A1 (en) * 2020-05-11 2021-11-18 珠海冠宇电池股份有限公司 Battery and electronic device
US12087914B2 (en) 2020-05-11 2024-09-10 Zhuhai Cosmx Battery Co., Ltd. Wound-type cell and preparation method thereof, battery and electronic product
CN113381058A (en) * 2021-06-09 2021-09-10 珠海冠宇电池股份有限公司 Lithium ion battery
CN113381058B (en) * 2021-06-09 2023-10-31 珠海冠宇电池股份有限公司 Lithium ion battery
WO2023279257A1 (en) * 2021-07-06 2023-01-12 宁德新能源科技有限公司 Electrochemical device and electronic device
CN114188501A (en) * 2021-11-23 2022-03-15 宁德新能源科技有限公司 Electrochemical device and electronic device
CN114188501B (en) * 2021-11-23 2024-08-13 宁德新能源科技有限公司 Electrochemical device and electronic device
CN115458879A (en) * 2022-09-28 2022-12-09 惠州锂威新能源科技有限公司 Battery cell and battery cell manufacturing method
CN115458879B (en) * 2022-09-28 2024-03-22 惠州锂威新能源科技有限公司 Battery cell and battery cell manufacturing method

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