WO2012019371A1 - Ternary protection lithium ion battery cap - Google Patents
Ternary protection lithium ion battery cap Download PDFInfo
- Publication number
- WO2012019371A1 WO2012019371A1 PCT/CN2010/076120 CN2010076120W WO2012019371A1 WO 2012019371 A1 WO2012019371 A1 WO 2012019371A1 CN 2010076120 W CN2010076120 W CN 2010076120W WO 2012019371 A1 WO2012019371 A1 WO 2012019371A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- explosion
- lithium ion
- ion battery
- sealing ring
- battery cap
- Prior art date
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 238000003466 welding Methods 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract 6
- 230000000694 effects Effects 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- 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
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/186—Sealing members characterised by the disposition of the 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
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- 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
Definitions
- the invention belongs to the technical field of lithium ion batteries, and in particular relates to a three-stage protection lithium ion battery cap. Background technique
- lithium ion batteries have the characteristics of small size, light weight, strong electric quantity, no memory, and environmental protection, and are widely used in industrial production and daily life.
- Existing lithium ion battery caps include a top cover, an explosion-proof diaphragm, a gasket and an orifice plate, and the top cover is sequentially combined with the explosion-proof diaphragm, the gasket and the orifice plate.
- the lithium ion battery has a low explosion-proof rating and poor safety performance.
- the sealing ring and the gasket are of an integral structure. When the battery cap of the structure is placed in the battery casing, the orifice plate is prone to quality problems such as deformation and falling off. The explosion-proof effect cannot be guaranteed, and the performance level of the battery is lowered. There are technical defects and safety hazards, and even serious accidents may occur. Summary of the invention
- the present invention provides a three-stage protection lithium ion battery cap for solving the technical problems existing in the prior art.
- the object of the present invention is to provide a solution to the problem of explosion-proof safety of a battery.
- the assembled battery has three-stage protection of simple structure, convenient assembly, stable performance, excellent explosion-proof performance, high safety level, long service life and wide application range. Lithium-ion battery cap.
- a three-stage protection lithium ion battery cap comprising a top cover, an explosion-proof diaphragm, an orifice plate, a top cover and an explosion-proof diaphragm and an orifice plate are sequentially combined, and the characteristics are: the explosion-proof diaphragm and the orifice plate are welded together, and the explosion-proof There is a circular indentation on the diaphragm, a PTC thermistor plate is arranged between the top cover and the explosion-proof diaphragm, and a sealing ring, a sealing ring and an orifice plate are arranged between the top cover, the PTC thermistor plate and the explosion-proof diaphragm and the battery case.
- the insulating mat is a separate assembly structure.
- the three-stage protection lithium ion battery cap has the following features: a sealing ring deformation space between the sealing ring and the orifice insulating pad, the sealing ring has a circular groove structure, the thickness is 1-5 mm, the orifice insulating pad The thickness of the butterfly is 0. 3 - 1. 0 mm.
- the PTC thermistor plate having a thickness of 0. 2-0. 5 mm.
- the three-stage protection lithium ion battery cap is characterized in that: the surface of the PTC thermistor plate is pure nickel foil, and the middle is a thermistor polymer material.
- the three-stage protective lithium-ion battery cap characterized in that: the explosion-proof diaphragm is provided with a circular explosion-proof nick, the nicked diameter is 6-15 mm, the thickness of the nick is 0. 03-0.
- the three-stage protection lithium ion battery cap is characterized in that: the explosion-proof diaphragm and the orifice plate are assembled by laser spot welding. 5 ⁇ The structure, the laser welding point has 2 to 10, the solder joint area is 0. 5 - 3 square mm.
- the three-stage protection lithium ion battery cap adopts the novel technical solution of the present invention, and the invention adopts the lithium ion battery cap three-stage protection structure as compared with the prior art.
- the three-stage explosion-proof methods are: circular scoring on the explosion-proof diaphragm; the explosion-proof diaphragm and the orifice plate are laser spot welding connection assembly structure; the PTC thermistor plate assembled between the top cover and the explosion-proof diaphragm.
- the sealing ring of the cap of the present application and the insulating pad of the orifice plate are separated structures, leaving a deformation space, which ensures that the orifice plate does not deform or fall off after the cap is placed in the sealing of the battery casing. Therefore, the three-stage protection lithium ion battery cap of the invention has the advantages of simple structure, convenient assembly, stable and reliable performance, excellent explosion-proof performance, high safety level, long service life and wide application range.
- FIG. 1 is a schematic view showing the structure of a three-stage protective lithium ion battery cap of the present invention.
- top cover 2. PTC thermistor board, 3. explosion-proof diaphragm, 4. sealing ring, 5. orifice plate, 6. laser welding spot, 7. orifice insulation pad, 8. air outlet, 9. Polar ear soldering area, 10. Scotch, 11. Battery case.
- a three-stage protection lithium ion battery cap comprising a top cover, an explosion-proof diaphragm, an orifice plate, a top cover and an explosion-proof diaphragm and an orifice plate are sequentially combined, and the explosion-proof diaphragm is welded with the orifice plate, and the explosion-proof membrane has Circular score, the diameter of the score is
- the thickness of the score is 0. 08 mm.
- PTC thermistor board is installed between the top cover and the explosion-proof diaphragm.
- the PTC thermistor board is round, the surface is pure nickel foil, and the middle is a thermistor with a total thickness of 1.3 mm.
- the explosion-proof diaphragm and the orifice plate are assembled by laser spot welding. There are 4 laser welding points and the welding spot area is 2 square millimeters.
- a sealing ring is arranged between the top cover, the PTC thermistor plate and the explosion-proof diaphragm and the battery case, and the sealing ring and the orifice insulating pad are separated assembly structures. 5 ⁇ The thickness of the plate is 0. 5 mm.
- the thickness of the plate is 0. 5 mm.
- the thickness of the plate is 0. 5 mm.
- the three-stage protection lithium-ion battery cap mounting structure includes: top cover 1, PTC thermistor board 2, explosion-proof diaphragm 3, sealing ring 4, orifice plate 5, laser welding spot 6, orifice insulation pad 7, the air outlet 8, the tab welding area 9, the hole plate 10, the battery case 11.
- the top cover 1, the PTC thermistor board 2, the explosion-proof diaphragm 3 and the orifice plate 5 are assembled in sequence, and a butterfly-shaped orifice insulating pad 7 is arranged between the explosion-proof diaphragm 3 and the orifice plate 5, and the outer surface is concave.
- the seal ring 4 is sealingly assembled with the battery can 11 .
- the sealing ring 4 and the orifice insulating mat 7 are separated from each other, leaving a deformation space. Change It has changed the hidden dangers and safety problems caused by the previous structure.
- the three-stage protection of the lithium ion battery cap of the present embodiment is as follows: First, the explosion-proof diaphragm has a circular indentation. The nick will burst at the rated gas pressure value, improving the safety and explosion-proof function of the power battery. Second, the explosion-proof diaphragm and the orifice plate are assembled by laser spot welding. When the explosion-proof diaphragm is blasted and deformed, the solder joint is broken and the circuit is broken, and the hole plate and the explosion-proof diaphragm are not torn open and the electricity is continuously discharged. The third is a PTC thermistor board assembled between the top cover and the explosion-proof diaphragm.
- the two surfaces are nickel foil and the middle is a thermistor polymer material.
- the conductor resistance is small, when the temperature rise changes, the resistance value increases with the temperature, and finally becomes an insulator, which cuts off the battery power and effectively plays an explosion-proof effect.
- the sealing ring 4 of the cap of the present application and the insulating pad 7 of the orifice plate are separated structures, and a deformation space is left to ensure that the orifice plate does not deform or fall off after the sealing plate is placed in the battery casing. It effectively prevents the safety and technical problems caused by the deformation of the connected structure. Therefore, the innovative design structure of the three-stage protection structure of the invention greatly improves the performance and explosion-proof grade of the lithium ion battery.
- the three-stage protection lithium ion battery cap of the invention has the advantages of simple structure, convenient assembly, stable performance, excellent explosion-proof performance, high safety grade, long service life and wide application range.
Landscapes
- 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)
- Gas Exhaust Devices For Batteries (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A ternary protection lithium ion battery cap includes a top cap (1), an anti-explosion membrane (3) and an orifice plate (5) combined in order, wherein the anti-explosion membrane (3) is welded to the orifice plate (5), and a circular nick is formed in the anti-explosion membrane (3). A positive temperature coefficient (PTC) thermistor plate (2) is installed between the top cap (1) and the anti-explosion membrane (3). A sealing ring (4) is placed between the top cap (1), the PTC thermistor plate (2), the anti-explosion membrane (3) and a battery case. The sealing ring (4) and an orifice plate insulating gasket (7) are separately assembled. The battery cap is simple in structure, convenient to assemble, stable and reliable in performance, excellent in anti-explosion performance, high in safety level and long in service life.
Description
一种三级保护锂离子电池盖帽 技术领域 Three-stage protection lithium ion battery cap technology field
本发明属于锂离子电池技术领域， 特别是涉及一种三级保护锂离子电池盖帽。 背景技术 The invention belongs to the technical field of lithium ion batteries, and in particular relates to a three-stage protection lithium ion battery cap. Background technique
目前， 锂离子电池具有体积小、 重量轻、 电量强、 无记忆、 绿色环保等特点， 广泛 应用于工业生产和日常生活中。 现有的锂离子电池盖帽， 包括顶盖、 防爆膜片、 垫圈和 孔板， 顶盖与防爆膜片、 垫圈和孔板依次组合在一起。 该锂离子电池的防爆等级低， 安 全性能差。 而且密封圈与垫圈为一体式结构， 该结构的电池盖帽放入电池外壳封装时， 孔板易产生变形、 脱落等质量问题。 造成防爆效果无法保证， 同时降低了电池的性能等 级， 存在技术缺陷和安全隐患， 甚至会造成重大事故等。 发明内容 At present, lithium ion batteries have the characteristics of small size, light weight, strong electric quantity, no memory, and environmental protection, and are widely used in industrial production and daily life. Existing lithium ion battery caps include a top cover, an explosion-proof diaphragm, a gasket and an orifice plate, and the top cover is sequentially combined with the explosion-proof diaphragm, the gasket and the orifice plate. The lithium ion battery has a low explosion-proof rating and poor safety performance. Moreover, the sealing ring and the gasket are of an integral structure. When the battery cap of the structure is placed in the battery casing, the orifice plate is prone to quality problems such as deformation and falling off. The explosion-proof effect cannot be guaranteed, and the performance level of the battery is lowered. There are technical defects and safety hazards, and even serious accidents may occur. Summary of the invention
本发明为解决公知技术中存在的技术问题而提供一种三级保护锂离子电池盖帽。 本发明的目的是提供一种解决电池的防爆安全性问题， 装配的电池具有结构简单、 装配方便、 性能稳定、 防爆性能优、 安全等级高、 使用寿命长、 适用范围广等特点的三 级保护锂离子电池盖帽。 The present invention provides a three-stage protection lithium ion battery cap for solving the technical problems existing in the prior art. The object of the present invention is to provide a solution to the problem of explosion-proof safety of a battery. The assembled battery has three-stage protection of simple structure, convenient assembly, stable performance, excellent explosion-proof performance, high safety level, long service life and wide application range. Lithium-ion battery cap.
本发明为解决公知技术中存在的技术问题所采取的技术方案是： The technical solution adopted by the present invention to solve the technical problems existing in the prior art is:
一种三级保护锂离子电池盖帽， 包括顶盖、 防爆膜片、 孔板， 顶盖与防爆膜片和孔 板依次组合在一起， 其特点是： 防爆膜片与孔板焊接在一起， 防爆膜片上有圆形刻痕， 顶盖和防爆膜片间装有 PTC热敏电阻板， 顶盖、 PTC热敏电阻板和防爆膜片与电池壳间 设有密封圈， 密封圈与孔板绝缘垫为分离式装配结构。 A three-stage protection lithium ion battery cap, comprising a top cover, an explosion-proof diaphragm, an orifice plate, a top cover and an explosion-proof diaphragm and an orifice plate are sequentially combined, and the characteristics are: the explosion-proof diaphragm and the orifice plate are welded together, and the explosion-proof There is a circular indentation on the diaphragm, a PTC thermistor plate is arranged between the top cover and the explosion-proof diaphragm, and a sealing ring, a sealing ring and an orifice plate are arranged between the top cover, the PTC thermistor plate and the explosion-proof diaphragm and the battery case. The insulating mat is a separate assembly structure.
本发明还可以采用如下技术方案： The invention can also adopt the following technical solutions:
所述的三级保护锂离子电池盖帽， 其特点是： 密封圈与孔板绝缘垫间有密封圈变形 空间， 密封圈为圆形凹槽式结构， 厚度为 1一 5毫米， 孔板绝缘垫为蝶形结构， 厚度为 0. 3 - 1. 0毫米。 The three-stage protection lithium ion battery cap has the following features: a sealing ring deformation space between the sealing ring and the orifice insulating pad, the sealing ring has a circular groove structure, the thickness is 1-5 mm, the orifice insulating pad The thickness of the butterfly is 0. 3 - 1. 0 mm.
所述的三级保护锂离子电池盖帽，其特点是: PTC热敏电阻板为圆形，厚度为 0. 2-0. 5 毫米。 5毫米。 The PTC thermistor plate having a thickness of 0. 2-0. 5 mm.
所述的三级保护锂离子电池盖帽， 其特点是： PTC热敏电阻板两表面为纯镍箔， 中 间为热敏电阻高分子材料。 The three-stage protection lithium ion battery cap is characterized in that: the surface of the PTC thermistor plate is pure nickel foil, and the middle is a thermistor polymer material.
所述的三级保护锂离子电池盖帽， 其特点是： 防爆膜片上设有圆形防爆刻痕， 刻痕 直径为 6-15毫米， 刻痕厚度为 0. 03-0. 1毫米。 毫米。 The three-stage protective lithium-ion battery cap, characterized in that: the explosion-proof diaphragm is provided with a circular explosion-proof nick, the nicked diameter is 6-15 mm, the thickness of the nick is 0. 03-0.
所述的三级保护锂离子电池盖帽， 其特点是： 防爆膜片与孔板为激光点焊连接组装
结构， 激光焊点有 2— 10个， 焊点面积为 0. 5— 3平方毫米。 The three-stage protection lithium ion battery cap is characterized in that: the explosion-proof diaphragm and the orifice plate are assembled by laser spot welding. 5毫米毫米毫米。 The structure, the laser welding point has 2 to 10, the solder joint area is 0. 5 - 3 square mm.
本发明具有的优点和积极效果是： The advantages and positive effects of the present invention are:
三级保护锂离子电池盖帽由于采用了本发明全新的技术方案， 与现有技术相比， 本 发明采用锂离子电池盖帽三级保护结构。三级防爆方式分别为：防爆膜片上有圆形刻痕; 防爆膜片与孔板为激光点焊连接组装结构； 顶盖与防爆膜片间装配的 PTC热敏电阻板。 同时本申请盖帽的密封圈与孔板绝缘垫为分离结构， 留有变形空间， 保证了盖帽放入电 池壳中封口后孔板不产生变形、 脱落等。 因此， 本发明三级保护锂离子电池盖帽具有结 构简单、 装配方便、 性能稳定可靠、 防爆性能优、 安全等级高、 使用寿命长、 适用范围 广等优点。 附图说明 The three-stage protection lithium ion battery cap adopts the novel technical solution of the present invention, and the invention adopts the lithium ion battery cap three-stage protection structure as compared with the prior art. The three-stage explosion-proof methods are: circular scoring on the explosion-proof diaphragm; the explosion-proof diaphragm and the orifice plate are laser spot welding connection assembly structure; the PTC thermistor plate assembled between the top cover and the explosion-proof diaphragm. At the same time, the sealing ring of the cap of the present application and the insulating pad of the orifice plate are separated structures, leaving a deformation space, which ensures that the orifice plate does not deform or fall off after the cap is placed in the sealing of the battery casing. Therefore, the three-stage protection lithium ion battery cap of the invention has the advantages of simple structure, convenient assembly, stable and reliable performance, excellent explosion-proof performance, high safety level, long service life and wide application range. DRAWINGS
图 1是本发明三级保护锂离子电池盖帽结构示意图。 1 is a schematic view showing the structure of a three-stage protective lithium ion battery cap of the present invention.
图中， 1.顶盖， 2. PTC热敏电阻板， 3.防爆膜片， 4.密封圈， 5.孔板， 6.激光焊点， 7. 孔板绝缘垫， 8.出气孔， 9.极耳焊接区， 10.刻痕， 11.电池壳。 具体实施方式 In the figure, 1. top cover, 2. PTC thermistor board, 3. explosion-proof diaphragm, 4. sealing ring, 5. orifice plate, 6. laser welding spot, 7. orifice insulation pad, 8. air outlet, 9. Polar ear soldering area, 10. Scotch, 11. Battery case. detailed description
为能进一步了解本发明的发明内容、 特点及功效， 兹例举以下实施例， 并配合附图 详细说明如下： In order to further understand the contents, features and effects of the present invention, the following embodiments are exemplified and described in detail with reference to the accompanying drawings:
参阅附图 1。 See Figure 1.
实施例 1 Example 1
一种三级保护锂离子电池盖帽， 包括顶盖、 防爆膜片、 孔板， 顶盖与防爆膜片和孔 板依次组合在一起， 其防爆膜片与孔板焊接在一起， 防爆膜片有圆形刻痕， 刻痕直径为 A three-stage protection lithium ion battery cap, comprising a top cover, an explosion-proof diaphragm, an orifice plate, a top cover and an explosion-proof diaphragm and an orifice plate are sequentially combined, and the explosion-proof diaphragm is welded with the orifice plate, and the explosion-proof membrane has Circular score, the diameter of the score is
8毫米， 刻痕厚度为 0. 08毫米。 顶盖和防爆膜片间装有 PTC热敏电阻板， PTC热敏电阻 板为圆形， 两表面为纯镍箔， 中间为热敏电阻， 总厚度为 1. 3毫米。 防爆膜片与孔板为 激光点焊连接组装结构， 激光焊点有 4个， 焊点面积为 2平方毫米。 顶盖、 PTC热敏电 阻板和防爆膜片与电池壳间设有密封圈， 密封圈与孔板绝缘垫为分离式装配结构。 密封 圈与孔板绝缘垫间有密封圈变形空间， 密封圈为圆形凹槽式结构， 厚度为 2毫米， 孔板 绝缘垫为蝶形结构， 厚度为 0. 5毫米。 8毫米, The thickness of the score is 0. 08 mm. PTC thermistor board is installed between the top cover and the explosion-proof diaphragm. The PTC thermistor board is round, the surface is pure nickel foil, and the middle is a thermistor with a total thickness of 1.3 mm. The explosion-proof diaphragm and the orifice plate are assembled by laser spot welding. There are 4 laser welding points and the welding spot area is 2 square millimeters. A sealing ring is arranged between the top cover, the PTC thermistor plate and the explosion-proof diaphragm and the battery case, and the sealing ring and the orifice insulating pad are separated assembly structures. 5毫米。 The thickness of the plate is 0. 5 mm. The thickness of the plate is 0. 5 mm. The thickness of the plate is 0. 5 mm.
本实施例的具体安装结构及其特性： The specific installation structure and characteristics of this embodiment:
如图 1所示， 三级保护锂离子电池盖帽安装结构包括： 顶盖 1， PTC热敏电阻板 2， 防爆膜片 3， 密封圈 4， 孔板 5， 激光焊点 6， 孔板绝缘垫 7， 出气孔 8， 极耳焊接区 9， 孔板刻痕 10， 电池壳 11。 自上至下顶盖 1、 PTC热敏电阻板 2、 防爆膜片 3和孔板 5依 次装配在一起， 防爆膜片 3和孔板 5间装有蝶形孔板绝缘垫 7， 外有凹形密封圈 4与电 池壳 11密封装配在一起。 密封圈 4与孔板绝缘垫 7间为分离结构， 留有变形空间。 改
变了以前连体结构带来的变形技术隐患和安全问题。 As shown in Figure 1, the three-stage protection lithium-ion battery cap mounting structure includes: top cover 1, PTC thermistor board 2, explosion-proof diaphragm 3, sealing ring 4, orifice plate 5, laser welding spot 6, orifice insulation pad 7, the air outlet 8, the tab welding area 9, the hole plate 10, the battery case 11. The top cover 1, the PTC thermistor board 2, the explosion-proof diaphragm 3 and the orifice plate 5 are assembled in sequence, and a butterfly-shaped orifice insulating pad 7 is arranged between the explosion-proof diaphragm 3 and the orifice plate 5, and the outer surface is concave. The seal ring 4 is sealingly assembled with the battery can 11 . The sealing ring 4 and the orifice insulating mat 7 are separated from each other, leaving a deformation space. Change It has changed the hidden dangers and safety problems caused by the previous structure.
本实施例锂离子电池盖帽三级保护分别为： 一是， 防爆膜片上有圆形刻痕。 该刻痕 会在额定气体压力值下爆开， 提高了动力电池的安全防爆功能。 二是， 防爆膜片与孔板 为激光点焊连接组装结构。 在防爆膜片爆破变形时， 拉断焊点， 造成断路， 不会出现孔 板与防爆膜片撕开而不断电的情况发生。 三是， 顶盖与防爆膜片间装配的 PTC热敏电阻 板。 其两表面为镍箔， 中间为热敏电阻高分子材料。 正常工作时， 作为导体电阻很小， 在发生温度升高变化时，其电阻值随温度增长而加大，最终变成绝缘体，切断电池电源， 有效起到防爆效果。 本申请盖帽的密封圈 4与孔板绝缘垫 7间为分离结构， 留有变形空 间， 保证了盖板放入电池壳中封口后孔板不产生变形、 脱落等。 有效防止了连体结构变 形造成的安全和使用技术问题。 因此， 本发明三级保护结构创新型设计结构， 大大提高 了锂离子电池的性能和防爆等级。 The three-stage protection of the lithium ion battery cap of the present embodiment is as follows: First, the explosion-proof diaphragm has a circular indentation. The nick will burst at the rated gas pressure value, improving the safety and explosion-proof function of the power battery. Second, the explosion-proof diaphragm and the orifice plate are assembled by laser spot welding. When the explosion-proof diaphragm is blasted and deformed, the solder joint is broken and the circuit is broken, and the hole plate and the explosion-proof diaphragm are not torn open and the electricity is continuously discharged. The third is a PTC thermistor board assembled between the top cover and the explosion-proof diaphragm. The two surfaces are nickel foil and the middle is a thermistor polymer material. In normal operation, as the conductor resistance is small, when the temperature rise changes, the resistance value increases with the temperature, and finally becomes an insulator, which cuts off the battery power and effectively plays an explosion-proof effect. The sealing ring 4 of the cap of the present application and the insulating pad 7 of the orifice plate are separated structures, and a deformation space is left to ensure that the orifice plate does not deform or fall off after the sealing plate is placed in the battery casing. It effectively prevents the safety and technical problems caused by the deformation of the connected structure. Therefore, the innovative design structure of the three-stage protection structure of the invention greatly improves the performance and explosion-proof grade of the lithium ion battery.
本发明的三级保护锂离子电池盖帽具有结构简单、 装配方便、 性能稳定、 防爆性能 优、 安全等级高、 使用寿命长、 适用范围广等优点。
The three-stage protection lithium ion battery cap of the invention has the advantages of simple structure, convenient assembly, stable performance, excellent explosion-proof performance, high safety grade, long service life and wide application range.
Claims
1、 一种三级保护锂离子电池盖帽， 包括顶盖、 防爆膜片、 孔板， 顶盖与防爆膜片 和孔板依次组合在一起， 其特征是： 防爆膜片与孔板焊接在一起， 防爆膜片上有圆形刻 痕， 顶盖和防爆膜片间装有 PTC热敏电阻板， 顶盖、 PTC热敏电阻板和防爆膜片与电 池壳间设有密封圈， 密封圈与孔板绝缘垫为分离式装配结构。 1. A three-stage protective lithium ion battery cap, comprising a top cover, an explosion-proof diaphragm, an orifice plate, a top cover and an explosion-proof diaphragm and an orifice plate are sequentially combined, and the feature is: the explosion-proof diaphragm is welded with the orifice plate The explosion-proof diaphragm has a circular nick, a PTC thermistor plate is arranged between the top cover and the explosion-proof diaphragm, and a sealing ring is arranged between the top cover, the PTC thermistor plate and the explosion-proof diaphragm and the battery case, and the sealing ring and the sealing ring The orifice insulation mat is a separate assembly structure.
2、 根据权利要求 1所述的三级保护锂离子电池盖帽， 其特征是： 密封圈与孔板绝 缘垫间有密封圈变形空间， 密封圈为圆形凹槽式结构， 厚度为 1一 5毫米， 孔板绝缘垫 为蝶形结构， 厚度为 0.3— 1.0毫米。 2. The three-stage protection lithium ion battery cap according to claim 1, wherein: the sealing ring and the orifice insulating pad have a sealing ring deformation space, and the sealing ring has a circular groove structure, and the thickness is 1-5. In millimeters, the orifice insulation mat is a butterfly structure with a thickness of 0.3 - 1.0 mm.
3、 根据权利要求 1或 2所述的三级保护锂离子电池盖帽， 其特征是： PTC热敏电 阻板为圆形， 厚度为 0.2-0.5毫米。 The three-stage protective lithium ion battery cap according to claim 1 or 2, wherein the PTC thermistor plate has a circular shape and a thickness of 0.2 to 0.5 mm.
4、 根据权利要求 3所述的三级保护锂离子电池盖帽， 其特征是： PTC热敏电阻板 两表面为纯镍箔， 中间为热敏电阻高分子材料。 4. The three-stage protection lithium ion battery cap according to claim 3, wherein: the surface of the PTC thermistor plate is a pure nickel foil, and the middle is a thermistor polymer material.
5、 根据权利要求 1所述的三级保护锂离子电池盖帽， 其特征是： 防爆膜片上设有 圆形防爆刻痕， 刻痕直径为 6— 15毫米， 刻痕厚度为 0.03-0.1毫米。 5. The three-stage protection lithium ion battery cap according to claim 1, wherein: the explosion-proof diaphragm is provided with a circular explosion-proof nick, the diameter of the nick is 6-15 mm, and the thickness of the nick is 0.03-0.1 mm. .
6、 根据权利要求 1或 5所述的三级保护锂离子电池盖帽， 其特征是： 防爆膜片与 孔板为激光点焊连接组装结构， 激光焊点有 2— 10个， 焊点面积为 0.5— 3平方毫米。 6. The three-stage protection lithium ion battery cap according to claim 1 or 5, wherein: the explosion-proof diaphragm and the orifice plate are laser spot welded joint assembly structures, and the laser welding points are 2-10, and the welding spot area is 0.5-3 square millimeters.
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| CN2010102483501A CN101916832A (en) | 2010-08-09 | 2010-08-09 | Three-level protective lithium ion battery cover |
| CN201010248350.1 | 2010-08-09 |
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| PCT/CN2010/076120 WO2012019371A1 (en) | 2010-08-09 | 2010-08-18 | Ternary protection lithium ion battery cap |
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| CN107507937A (en) * | 2017-07-24 | 2017-12-22 | 山东高佳新能源有限公司 | A kind of heat-insulating, fire-preventing anti-explosion battery group |
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| CN101916832A (en) | 2010-12-15 |
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