CN110444701A - Lithium battery anti-package combined hat - Google Patents

Lithium battery anti-package combined hat Download PDF

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Publication number
CN110444701A
CN110444701A CN201910737442.7A CN201910737442A CN110444701A CN 110444701 A CN110444701 A CN 110444701A CN 201910737442 A CN201910737442 A CN 201910737442A CN 110444701 A CN110444701 A CN 110444701A
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CN
China
Prior art keywords
explosion
aluminum sheet
aluminium flake
proof
wall
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Pending
Application number
CN201910737442.7A
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Chinese (zh)
Inventor
徐晓勇
张纯辉
郝世洪
刘元成
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Changzhou Wujin Zhong Rui Electronic Polytron Technologies Inc
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Changzhou Wujin Zhong Rui Electronic Polytron Technologies Inc
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Priority to CN201910737442.7A priority Critical patent/CN110444701A/en
Publication of CN110444701A publication Critical patent/CN110444701A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本发明涉及一种锂电池反包组合帽，包括密封圈，密封圈内圈之间卡设有防爆铝片，防爆铝片下方设有连接铝片，连接铝片中心凸起与防爆铝片底面贴合，连接铝片中心凸起两侧形成泄压腔，位于连接铝片外侧边缘与防爆铝片内壁之间卡接有隔离圈，隔离圈外周具有插接于防爆铝片内的环形翅片，位于所述泄压腔内的防爆铝片内壁具有向内收缩而使内壁变薄的收缩段。本发明通过将位于泄压腔内的防爆铝片内壁设置成收缩段，使得该部分的防爆铝片内壁变薄，以减少连接铝片与防爆铝片之间的切断阻力，在锂电池意外出现短路造成内部压力增大时，可以更快地使防爆铝片产生变形而断裂，及时释放锂电池内部压力，防止出现锂电池受压损坏甚至爆炸的危险。

The invention relates to a reverse-wrapped combination cap for a lithium battery, comprising a sealing ring, an explosion-proof aluminum sheet is clamped between the inner rings of the sealing ring, a connecting aluminum sheet is arranged under the explosion-proof aluminum sheet, and the central protrusion of the connecting aluminum sheet is connected to the bottom surface of the explosion-proof aluminum sheet Bonding, connecting the two sides of the central protrusion of the aluminum sheet to form a pressure relief chamber, an isolation ring is clamped between the outer edge of the connecting aluminum sheet and the inner wall of the explosion-proof aluminum sheet, and the outer periphery of the isolation ring has annular fins inserted into the explosion-proof aluminum sheet , the inner wall of the explosion-proof aluminum plate located in the pressure relief chamber has a shrinking section that shrinks inward to make the inner wall thinner. In the present invention, the inner wall of the explosion-proof aluminum sheet located in the pressure relief chamber is set as a contraction section, so that the inner wall of the explosion-proof aluminum sheet in this part is thinned, so as to reduce the cutting resistance between the connecting aluminum sheet and the explosion-proof aluminum sheet. When the internal pressure increases due to a short circuit, the explosion-proof aluminum sheet can be deformed and broken faster, and the internal pressure of the lithium battery can be released in time to prevent the lithium battery from being damaged or even exploded under pressure.

Description

锂电池反包组合帽Lithium battery anti-pack combination cap

技术领域technical field

本发明涉及锂离子电池技术领域，尤其是一种锂电池反包组合帽。The invention relates to the technical field of lithium-ion batteries, in particular to a reverse-wrapped combination cap for lithium batteries.

背景技术Background technique

锂离子电池所用的盖帽结构中，设有防爆铝片及连接铝片，并在防爆铝片和连接铝片上开设若干裂槽，一旦电池发生短路造成电池内部压力增高，则可冲断裂槽使内压快速释放而保护电池不受影响。不过就现有结构的防爆铝片而言，其壁厚基本保持一致，由此也在电池内部压力增高时，虽有裂槽作用，但连接铝片与防爆铝片之间的切断阻力依然还是不小，造成电池内部压力难以快速释放。In the cap structure used in lithium-ion batteries, there are explosion-proof aluminum sheets and connecting aluminum sheets, and several cracks are opened on the explosion-proof aluminum sheets and connecting aluminum sheets. The pressure is released quickly to protect the battery from damage. However, as far as the explosion-proof aluminum sheet of the existing structure is concerned, its wall thickness remains basically the same. Therefore, when the internal pressure of the battery increases, although there is a crack effect, the cutting resistance between the connecting aluminum sheet and the explosion-proof aluminum sheet is still the same. Not small, making it difficult to quickly release the internal pressure of the battery.

发明内容Contents of the invention

本发明要解决的技术问题是：为了克服现有技术中之不足，本发明提供一种能更快释放电池内部压力的锂电池反包组合帽。The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, the present invention provides a lithium battery turn-up combined cap capable of releasing the internal pressure of the battery faster.

本发明解决其技术问题所采用的技术方案是：一种锂电池反包组合帽，包括卡装在锂电池钢壳上端开口之间的密封圈，密封圈内圈之间卡设有防爆铝片，防爆铝片下方设有连接铝片，连接铝片中心凸起与防爆铝片底面贴合，连接铝片中心凸起两侧形成泄压腔，位于连接铝片外侧边缘与防爆铝片内壁之间卡接有隔离圈，连接铝片中心凸起部分具有开口朝上的上裂槽，与隔离圈上端面对应的防爆铝片内壁上开设有开口朝下的下裂槽，所述的隔离圈外周具有插接于防爆铝片外周边内的环形翅片，位于所述泄压腔内的防爆铝片内壁具有向内收缩而使内壁变薄的收缩段。The technical solution adopted by the present invention to solve the technical problem is: a lithium battery reverse package combination cap, including a sealing ring clamped between the openings of the upper end of the steel shell of the lithium battery, and an explosion-proof aluminum sheet is clamped between the inner rings of the sealing ring , There is a connecting aluminum sheet under the explosion-proof aluminum sheet, the central protrusion of the connecting aluminum sheet is attached to the bottom surface of the explosion-proof aluminum sheet, and the two sides of the central protrusion of the connecting aluminum sheet form a pressure relief chamber, which is located between the outer edge of the connecting aluminum sheet and the inner wall of the explosion-proof aluminum sheet An isolation ring is clamped between them, and the central raised part of the connecting aluminum sheet has an upper crack with the opening facing upward, and the inner wall of the explosion-proof aluminum sheet corresponding to the upper end of the isolation ring is provided with a lower crack with the opening facing downward. The outer periphery of the ring has annular fins inserted into the outer periphery of the explosion-proof aluminum sheet, and the inner wall of the explosion-proof aluminum sheet located in the pressure relief chamber has a contraction section that shrinks inward to make the inner wall thinner.

具体说，所述的收缩段呈向斜上方倾斜状，收缩段下端与连接铝片中心凸起面齐平，收缩段上端与隔离圈上平面齐平，所述收缩段具有从下端向其中心延伸的斜面，所述斜面的顶端止于隔离圈上平面延伸线。Specifically, the shrinkage section is inclined upward, the lower end of the shrinkage section is flush with the raised surface of the connecting aluminum sheet, the upper end of the shrinkage section is flush with the upper plane of the isolation ring, and the shrinkage section has a An extended slope, the top of which terminates at the plane extension line on the spacer ring.

进一步地，所述的连接铝片上开设有连通泄压腔的通孔。Further, the connecting aluminum sheet is provided with a through hole communicating with the pressure relief chamber.

所述的防爆铝片外周具有向下并向内折弯的内折边，所述内折边与防爆铝片内壁之间形成插入所述环形翅片的卡槽。The outer periphery of the explosion-proof aluminum sheet has an inner flange bent downward and inward, and a slot for inserting the annular fin is formed between the inner flange and the inner wall of the explosion-proof aluminum sheet.

本发明的有益效果是：本发明通过将位于泄压腔内的防爆铝片内壁设置成收缩状，使得该部分的防爆铝片内壁变薄，以减少连接铝片与防爆铝片之间的切断阻力，在锂电池意外出现短路造成内部压力增大时，配合上、下裂槽，更快地使防爆铝片产生变形，当电池内压增加到一定程度后，防爆铝片出现变形断裂，从而可及时释放锂电池内部压力，防止出现锂电池受压损坏甚至产生爆炸的危险。The beneficial effects of the present invention are: the present invention makes the inner wall of the explosion-proof aluminum sheet in this part thinner by setting the inner wall of the explosion-proof aluminum sheet located in the pressure relief chamber into a contracted shape, so as to reduce the cutting between the connecting aluminum sheet and the explosion-proof aluminum sheet Resistance, when the internal pressure increases due to an accidental short circuit of the lithium battery, the upper and lower cracks are used to deform the explosion-proof aluminum sheet faster. When the internal pressure of the battery increases to a certain level, the explosion-proof aluminum sheet deforms and breaks, thereby The internal pressure of the lithium battery can be released in time to prevent the lithium battery from being damaged or even exploded due to pressure.

附图说明Description of drawings

下面结合附图和实施方式对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

图1是本发明的结构示意图。Fig. 1 is a schematic structural view of the present invention.

图中：1.密封圈，2.防爆铝片，2-1.内折边，3.连接铝片，4.泄压腔5.隔离圈，5-1.环形翅片，6.收缩段，6-1.斜面，7.通孔，8.卡槽。In the figure: 1. Seal ring, 2. Explosion-proof aluminum sheet, 2-1. Inner flange, 3. Connecting aluminum sheet, 4. Pressure relief chamber, 5. Isolation ring, 5-1. Annular fin, 6. Shrink section , 6-1. Bevel, 7. Through hole, 8. Card slot.

具体实施方式Detailed ways

现在结合附图对本发明作进一步详细的说明。这些附图均为简化的示意图，仅以示意方式说明本发明的基本结构，因此其仅显示与本发明有关的构成。The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

如图1所示的一种锂电池反包组合帽，包括卡装在锂电池钢壳上端开口之间的密封圈1，密封圈1内圈之间卡设有防爆铝片2，防爆铝片2底面置于密封圈1内底面的凸棱上；位于防爆铝片2下方设有连接铝片3，连接铝片3中心凸起与防爆铝片2底面贴合，位于连接铝片3外侧边缘与防爆铝片2内壁之间卡接有隔离圈5，连接铝片3中心凸起部分具有开口朝上的上裂槽，与隔离圈5上端面对应的防爆铝片2内壁上开设有开口朝下的下裂槽。密封圈1外周在安装后向内折弯覆盖于防爆铝片2表面。As shown in Figure 1, a lithium battery anti-pack combination cap includes a sealing ring 1 clamped between the openings of the upper end of the lithium battery steel case, an explosion-proof aluminum sheet 2 is clamped between the inner rings of the sealing ring 1, and the explosion-proof aluminum sheet The bottom surface of 2 is placed on the convex edge of the inner bottom surface of the sealing ring 1; the connecting aluminum sheet 3 is located under the explosion-proof aluminum sheet 2, and the central protrusion of the connecting aluminum sheet 3 fits with the bottom surface of the explosion-proof aluminum sheet 2, and is located on the outer edge of the connecting aluminum sheet 3 An isolation ring 5 is clamped between the inner wall of the explosion-proof aluminum sheet 2, and the central raised part of the connection aluminum sheet 3 has an upper crack with an opening facing upward, and an opening is opened on the inner wall of the explosion-proof aluminum sheet 2 corresponding to the upper end of the isolation ring 5 Downward slits. After installation, the outer periphery of the sealing ring 1 is bent inwards to cover the surface of the explosion-proof aluminum sheet 2 .

所述连接铝片3中心凸起两侧形成泄压腔4，所述泄压腔4由防爆铝片2、连接铝片3及隔离圈5围成，所述的连接铝片3上开设有连通泄压腔4的通孔7。The two sides of the connecting aluminum sheet 3 protrude to form a pressure relief chamber 4, the pressure relief chamber 4 is surrounded by the explosion-proof aluminum sheet 2, the connecting aluminum sheet 3 and the isolation ring 5, and the connecting aluminum sheet 3 is provided with It communicates with the through hole 7 of the pressure relief chamber 4 .

所述的隔离圈5外周具有插接于防爆铝片2内的环形翅片5-1，具体说，所述的防爆铝片2外周具有向下并向内折弯的内折边2-1，所述内折边2-1与防爆铝片2内壁之间形成插入所述环形翅片5-1的卡槽8。The outer periphery of the isolation ring 5 has annular fins 5-1 inserted into the explosion-proof aluminum sheet 2. Specifically, the outer periphery of the explosion-proof aluminum sheet 2 has an inner flange 2-1 bent downward and inward. A slot 8 for inserting the annular fin 5-1 is formed between the inner flange 2-1 and the inner wall of the explosion-proof aluminum sheet 2.

位于所述泄压腔4内的防爆铝片2内壁具有向内收缩而使内壁变薄的收缩段6，所述的收缩段6呈向斜上方倾斜状，收缩段6下端与连接铝片3中心凸起面齐平，收缩段6上端与隔离圈5上平面齐平，所述收缩段6具有从下端向其中心延伸的斜面6-1，所述斜面6-1的顶端止于隔离圈5上平面延伸线。The inner wall of the explosion-proof aluminum sheet 2 located in the pressure relief chamber 4 has a shrinkage section 6 that shrinks inward to make the inner wall thinner. The shrinkage section 6 is inclined upward. The central convex surface is flush, and the upper end of the contraction section 6 is flush with the upper plane of the spacer ring 5. The contraction section 6 has a slope 6-1 extending from the lower end to its center, and the top end of the slope 6-1 stops at the spacer ring. 5 Upper plane extension line.

本发明通过将位于泄压腔4内的防爆铝片2内壁设置成收缩段6，使得该部分的防爆铝片2内壁变薄，以减少连接铝片3与防爆铝片2之间的切断阻力，在锂电池意外出现短路造成内部压力增大时，配合上、下裂槽，更快地使防爆铝片2产生变形，电池断电，防止电池爆炸。当电池内压增加到一定程度后，防爆铝片2出现断裂，从而及时释放锂电池内部压力，防止出现锂电池受压损坏甚至产生爆炸的危险。In the present invention, the inner wall of the explosion-proof aluminum sheet 2 located in the pressure relief chamber 4 is set as a contraction section 6, so that the inner wall of the explosion-proof aluminum sheet 2 in this part becomes thinner, so as to reduce the cutting resistance between the connecting aluminum sheet 3 and the explosion-proof aluminum sheet 2 , when the internal pressure increases due to an accidental short circuit in the lithium battery, cooperate with the upper and lower cracks to deform the explosion-proof aluminum sheet 2 faster, and the battery is powered off to prevent the battery from exploding. When the internal pressure of the battery increases to a certain level, the explosion-proof aluminum sheet 2 breaks, thereby releasing the internal pressure of the lithium battery in time, preventing the lithium battery from being damaged or even exploded due to pressure.

以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (4)

1. a kind of lithium battery anti-package combined hat, including the sealing ring (1) being installed between lithium battery steel shell upper end opening, sealing ring (1) it is arranged between inner ring explosion-proof aluminium flake (2), connection aluminium flake (3), cardiac prominence in connection aluminium flake (3) is equipped with below explosion-proof aluminium flake (2) It rises and is bonded with explosion-proof aluminium flake (2) bottom surface, connection aluminium flake (3) central protuberance two sides form pressure-releasing chamber (4), are located at connection aluminium flake (3) It is connected with cage ring (5) between outer ledge and explosion-proof aluminium flake (2) inner wall, connection aluminium flake (3) central protuberance part has opening Slot is split on upward, offered on explosion-proof aluminium flake (2) inner wall corresponding with cage ring (5) upper surface it is downward opening under split slot, It is characterized in that: cage ring (5) periphery has the ring fin (5-1) being plugged in explosion-proof aluminium flake (2) outer periphery, it is located at Explosion-proof aluminium flake (2) inner wall in the pressure-releasing chamber (4) has to contract and the contraction section (6) that keeps inner wall thinning.
2. lithium battery anti-package combined hat as described in claim 1, it is characterized in that: the contraction section (6) is in incline obliquely upward Ramp-like, contraction section (6) lower end is flushed with aluminium flake (3) central protuberance face is connect, plane on contraction section (6) upper end and cage ring (5) Flush, the contraction section (6) have from lower end thereto the heart extend inclined-plane (6-1), the top of the inclined-plane (6-1) terminate in every From plane extension line on circle (5).
3. lithium battery anti-package combined hat as claimed in claim 2, it is characterized in that: the company of offering on the connection aluminium flake (3) The through-hole (7) of logical pressure-releasing chamber (4).
4. lithium battery anti-package combined hat as described in claim 1, it is characterized in that: explosion-proof aluminium flake (2) periphery have to Lower and inwardly bending inside edge (2-1), forms described in insertion between the inside edge (2-1) and explosion-proof aluminium flake (2) inner wall The card slot (8) of ring fin (5-1).
CN201910737442.7A 2019-08-09 2019-08-09 Lithium battery anti-package combined hat Pending CN110444701A (en)

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CN112234308A (en) * 2020-11-10 2021-01-15 苏州橙柳电子精密有限公司 A shock-resistant battery cap and battery core
CN113394462A (en) * 2020-03-11 2021-09-14 Oppo（重庆）智能科技有限公司 Press fitting equipment

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CN104716281A (en) * 2015-04-09 2015-06-17 常州市武进中瑞电子有限公司 Thin type anti-explosion cylinder lithium battery combined cap
CN204464333U (en) * 2015-04-09 2015-07-08 常州市武进中瑞电子有限公司 Ultrasonic welding simple explosion-proof combination cap
CN204792935U (en) * 2015-07-08 2015-11-18 常州市武进中瑞电子有限公司 All -round, ne -leakage lithium cell
CN207517742U (en) * 2017-09-21 2018-06-19 深圳市沃特玛电池有限公司 A kind of lithium ion battery cover
CN210325874U (en) * 2019-08-09 2020-04-14 常州武进中瑞电子科技股份有限公司 Lithium battery reverse-wrapping combined cap

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113394462A (en) * 2020-03-11 2021-09-14 Oppo（重庆）智能科技有限公司 Press fitting equipment
CN112234308A (en) * 2020-11-10 2021-01-15 苏州橙柳电子精密有限公司 A shock-resistant battery cap and battery core

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Application publication date: 20191112