CN1808760A - Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film - Google Patents
Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film Download PDFInfo
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Abstract
本发明涉及一种圆柱铝塑复合膜软包装锂离子蓄电池，其特征在于：壳体为铝塑复合膜软包装圆柱形体，以可以脱出和嵌入锂离子的复合金属氧化物及组合物为正极材料，以可以嵌入和脱出锂离子的材料及组合物为负极材料，用铝箔制成正极极片，石墨为负极材料，用铜或镍箔上制成负极极片，将隔膜、负极极片、隔膜和正极极片叠加一起卷绕成圆柱形电极卷芯，其外部卷绕固定胶带，两端的正、负极耳平行或在同一中心线，正极极耳上热熔胶膜与铝塑复合膜热封，该电池具有不会发生气涨，即使发生漏气，也不会使电池的性能衰减而失效，提高了电池的使用寿命和可靠性的优点及效果。
The invention relates to a cylindrical aluminum-plastic composite film soft-packaged lithium-ion storage battery, which is characterized in that: the shell is a cylindrical body of aluminum-plastic composite film soft-package, and the positive electrode material is a composite metal oxide and a composition capable of extracting and inserting lithium ions. Materials and compositions that can intercalate and extract lithium ions are negative electrode materials, aluminum foils are used to make positive electrode sheets, graphite is used as negative electrode materials, copper or nickel foils are used to make negative electrode sheets, and separators, negative electrode sheets, separators and positive electrodes The pole pieces are superimposed and wound together to form a cylindrical electrode core, the outside of which is wound with a fixed tape, the positive and negative tabs at both ends are parallel or on the same center line, and the hot-melt adhesive film on the positive tab is heat-sealed with the aluminum-plastic composite film. The battery has the advantages and effects of no gas inflation, even if gas leakage occurs, the performance of the battery will not be attenuated and become invalid, and the service life and reliability of the battery are improved.
Description
技术领域technical field
本发明涉及一种圆柱铝塑复合膜软包装锂离子蓄电池，属能源电池领域。The invention relates to a cylindrical aluminum-plastic composite film soft-packaged lithium-ion storage battery, which belongs to the field of energy batteries.
技术背景technical background
目前的锂离子蓄电池一般采用刚性壳体或柔性壳体封装，刚性壳体一般用金属材料，如不锈钢或铝合金，也可以用高强度的工程塑料，它的特点强度高，但重量较大，而且改变尺寸和形状方法复杂，而柔性壳体采用铝塑膜封装，它的特点材料成本低、重量轻、壳体尺寸可灵活改变，生产速度快，而且安全性好，但是目前的软包装锂离子蓄电池均为方形结构，虽然能充分利用空间，但是存在的气涨和漏气问题，造成电池性能迅速恶化，从而使电池失效。The current lithium-ion batteries are generally packaged in rigid shells or flexible shells. Rigid shells are generally made of metal materials, such as stainless steel or aluminum alloy, and high-strength engineering plastics can also be used. It has high strength but heavy weight. Moreover, the method of changing the size and shape is complicated, and the flexible shell is packaged with aluminum-plastic film. Its characteristics are low material cost, light weight, flexible change of shell size, fast production speed, and good safety. However, the current flexible packaging lithium ion Batteries are all in a square structure. Although the space can be fully utilized, there are gas inflation and leakage problems, which cause the battery performance to deteriorate rapidly and cause the battery to fail.
发明内容Contents of the invention
本发明的目的正是为了克服上述已有技术的缺点与不足而提供一种圆柱铝塑复合膜软包装锂离子蓄电池，从而可避免电池发生气涨和漏气问题，提高电池的可靠性和使用寿命。The purpose of the present invention is to provide a cylindrical aluminum-plastic composite film soft-packed lithium-ion battery to overcome the above-mentioned shortcomings and deficiencies of the prior art, thereby avoiding the problems of gas inflation and gas leakage in the battery, and improving the reliability and service life of the battery .
本发明的目的是通过下列技术方案实现的：The purpose of the present invention is achieved through the following technical solutions:
圆柱铝塑复合膜软包装锂离子蓄电池，它由壳体(2)和正极极片(5)、负极极片(4)与隔膜(3)组成的电极卷芯及正极极耳(1)、负极极耳(7)、注液孔和电解液组成，其特征在于：Cylindrical aluminum-plastic composite film soft-packaged lithium-ion battery, which consists of a casing (2), a positive pole piece (5), a negative pole piece (4) and a separator (3) composed of an electrode roll core, a positive pole lug (1), a negative pole It consists of tabs (7), liquid injection holes and electrolyte, and is characterized in that:
壳体为铝塑复合膜软包装圆筒形体，以可以脱出和嵌入锂离子的复合金属氧化物或者是上述原料任意两种或两种以上任意比例的组合物为正极材料，涂在正极集流体上制成正极极片，以可以嵌入和脱出锂离子的材料或是上述材料任意两种或两种以上任意比例的组合物为负极材料，涂在负极集流体上制成负极极片，铝箔片为正极极耳，铜或镍或铝箔片为负极极耳，壳体内装有由隔膜、负极极片、隔膜和正极极片叠加一起卷绕成的圆柱形电极卷芯，电极卷芯外部两端及中部卷绕固定胶带，伸出两端的一对或两对或两对以上的正、负极极耳在同一中心线上或呈平行位置，且正、负极极耳平面与和铝塑复合膜封边垂直，极耳上热熔胶膜或PP胶块与铝塑复合膜热封。The shell is a cylindrical body with aluminum-plastic composite film flexible packaging, and the composite metal oxide that can extract and insert lithium ions or a composition of any two or more of the above-mentioned raw materials in any ratio is used as the positive electrode material, and is coated on the positive electrode current collector. Make a positive electrode sheet, use a material that can intercalate and extract lithium ions or a combination of any two or more of the above materials in any proportion as the negative electrode material, and coat it on the negative electrode current collector to make the negative electrode sheet. The aluminum foil is Positive pole lug, copper or nickel or aluminum foil is the negative pole lug, and the shell is equipped with a cylindrical electrode core wound by a diaphragm, a negative pole piece, a diaphragm and a positive pole piece, and the outer ends of the electrode core and The fixed tape is wound in the middle, and one pair or two pairs or more than two pairs of positive and negative tabs protruding from both ends are on the same center line or in parallel positions, and the planes of the positive and negative tabs are edge-sealed with aluminum-plastic composite film Vertically, hot-melt adhesive film or PP rubber block and aluminum-plastic composite film are heat-sealed on the tab.
所述的可以脱出和嵌入锂离子的复合金属氧化物是锰酸锂、钴酸锂、镍酸理、镍钴酸锂或磷酸亚铁锂，但不限于上述材料；可以嵌入和脱出锂离子的材料是软碳、硬碳、石墨、锡合金、硅或金属锂，但不限于上述材料；所述正极集流体是铝箔、铝网或不锈钢箔；所述负极集流体是铜箔、铜网、镍箔、镍网或不锈钢箔，但不限于上述材料。The composite metal oxide that can extract and intercalate lithium ions is lithium manganate, lithium cobaltate, nickel acid, lithium nickel cobaltate or lithium iron phosphate, but not limited to the above materials; The material is soft carbon, hard carbon, graphite, tin alloy, silicon or metal lithium, but not limited to the above materials; the positive electrode collector is aluminum foil, aluminum mesh or stainless steel foil; the negative electrode collector is copper foil, copper mesh, Nickel foil, nickel mesh or stainless steel foil, but not limited to the above materials.
当电极超过一定长度时，电极卷芯两端采用两对或两对以上的正、负极极耳平行重叠后同端用铜或铝片连接，其两端再分别与正、负极耳连接。When the electrode exceeds a certain length, two or more pairs of positive and negative pole lugs are overlapped in parallel at both ends of the electrode winding core, and then the same ends are connected with copper or aluminum sheets, and the two ends are respectively connected to the positive and negative pole lugs.
由于采取上述技术方案使本发明技术与已有技术相比具有如下优点及效果：Compared with the prior art, the technology of the present invention has the following advantages and effects due to the above-mentioned technical scheme:
(a)该电池采用圆柱形的结构，正极、负极和隔膜通过卷绕方式制成圆柱形电池芯，将铝塑膜复合膜制成圆筒形，再把电池芯封装在铝塑复合膜圆筒中，这样铝塑复合膜可以牢固地固定电池芯，使电池芯内部正、负极紧密的接触，从而使电池降低发生气涨的可能性，即使发生漏气，也不会使电池的性能迅速衰减而失效，因此提高了电池的使用寿命和可靠性；(a) The battery adopts a cylindrical structure. The positive electrode, the negative electrode and the diaphragm are wound into a cylindrical battery core, and the aluminum-plastic composite film is made into a cylindrical shape, and then the battery core is packaged in the aluminum-plastic composite film circle. In this way, the aluminum-plastic composite film can firmly fix the battery core, so that the positive and negative electrodes inside the battery core are in close contact, so that the possibility of gas inflation of the battery is reduced, and even if gas leakage occurs, the performance of the battery will not rapidly decay. failure, thus improving battery life and reliability;
(b)正、负极极耳在同一中心线上或呈平行位置，极耳平面和铝塑复合膜封边垂直，这样既能节约材料又使电池能量密度增加，改善外观；(b) The positive and negative tabs are on the same center line or in parallel positions, and the plane of the tabs is perpendicular to the edge sealing of the aluminum-plastic composite film, which can save materials and increase the energy density of the battery and improve the appearance;
(c)本发明的圆柱铝塑复合膜软包装锰酸锂锂离子蓄电池与己有钢壳电池和方型软包装电池基本参数比较如下：见表1(c) The basic parameters of the cylindrical aluminum-plastic composite film soft-packaged lithium manganate lithium ion storage battery of the present invention are compared with existing steel shell batteries and square soft-packaged batteries as follows: see Table 1
表1 电池基本参数比较
从表1的对比结果说明本发明电池具有更高的比能量，特别是不存在气胀问题，同时漏气问题对性能影响也非常小，因此具有优越的循环性能，IC循环可以达到1000次的寿命，远远超过己有电池性能；(e)电池以1C，100％DOD进行循环1000次，放电容量还保持在70％以上，比己有电池循环寿命长。The comparison results in Table 1 show that the battery of the present invention has higher specific energy, especially does not have the problem of inflation, and the problem of air leakage has very little impact on performance, so it has excellent cycle performance, and the IC cycle can reach 1000 times. The service life far exceeds the performance of the existing battery; (e) the battery is cycled 1000 times at 1C, 100% DOD, and the discharge capacity is still maintained at more than 70%, which is longer than the cycle life of the existing battery.
附图说明Description of drawings
图1为本发明的结构示意图Fig. 1 is a structural representation of the present invention
图2为本发明的电池1C，100％DOD进行循环1000次放电容量结果曲线图Fig. 2 is battery 1C of the present invention, and 100% DOD carries out the curve chart of 1000 times of cycle discharge capacity results
具体实施方式Detailed ways
实施例1Example 1
圆柱铝塑复合膜软包装锂离子蓄电池，由图1所示，壳体(2)为铝塑复合膜软包装圆筒形体，选用锰酸锂为正极材料，涂在铝箔上制成正极极片(5)，选用石墨为负极材料，涂在铜箔上制成负极极片(4)，选用铝箔片为正极极耳(1)，铜箔片为负极极耳(7)，壳体内装有由隔膜(3)、负极极片、隔膜和正极极片叠加一起卷绕成的圆柱形电极卷芯，电极卷芯外部的两端及中部卷绕固定胶带(图中未示)，伸出两端的一对正、负极极耳在同一中心线上，且正、负极极耳平面与和铝塑复合膜封边垂直，极耳上PP胶块(6)与铝塑复合膜热封，注液孔(图中未示)装在正极极耳一侧，注电解液(图中未示)，经充电、放电化成，抽真空，封注液孔，制成圆柱铝塑复合膜软包装锂离子蓄电池，该电池1C，100％DOD进行循环1000次放电容量结果，由图2所示，循环1000次放电容量还保持在70％。Cylindrical aluminum-plastic composite film flexible packaging lithium-ion battery, as shown in Figure 1, the shell (2) is a cylindrical body in aluminum-plastic composite film flexible packaging, lithium manganate is selected as the positive electrode material, and the positive electrode sheet is made of aluminum foil (5 ), choose graphite as the negative electrode material, apply it on the copper foil to make the negative pole piece (4), choose the aluminum foil piece as the positive pole tab (1), and the copper foil piece as the negative pole tab (7). (3) Cylindrical electrode roll core formed by stacking the negative pole piece, the separator and the positive pole piece together, the outer two ends and the middle of the electrode roll core are wrapped with fixing tape (not shown in the figure), and one of the two ends is protruded The positive and negative tabs are on the same center line, and the plane of the positive and negative tabs is perpendicular to the edge sealing of the aluminum-plastic composite film. The PP rubber block (6) on the tab is heat-sealed with the aluminum-plastic composite film, and the liquid injection hole ( (not shown in the figure) is installed on the side of the positive pole ear, inject electrolyte (not shown in the figure), form after charging and discharging, vacuumize, seal the liquid injection hole, and make a cylindrical aluminum-plastic composite film soft-packed lithium-ion battery.
实施例2Example 2
圆柱铝塑复合膜软包装锂离子蓄电池，由图1所示，壳体为铝塑复合膜软包装圆筒形体，选用钴酸锂和镍酸锂按重量比为2∶1比例的组合物为正极材料，涂在铝网上制成正极极片(5)，选用软碳和硬碳按重量比为2∶1比例的组合物为负极材料，涂在铜网上制成负极极片(4)，选用铝箔片为正极极耳(1)，镍箔片为负极极耳(7)，壳体内装有由隔膜(3)、负极极片、隔膜和正极极片叠加一起卷绕成的圆柱形电极卷芯，电极卷芯外部的两端及中部卷绕固定胶带(图中未示)，伸出两端的两对正、负极极耳在同一中心线上，两对正、负极极耳平行重叠后同端用铜片连接，其两端再分别与正、负极极耳连接，且正、负极极耳平面与和铝塑复合膜封边垂直，极耳上热熔胶(图中未示)与铝塑复合膜热封，注液孔(图中未示)装在正极极耳一侧，注电解液(图中未示)，经充电、放电化成，抽真空，封注液孔，制成圆柱铝塑复合膜软包装锂离子蓄电池。Cylindrical aluminum-plastic composite film flexible packaging lithium-ion battery, as shown in Figure 1, the shell is a cylindrical body of aluminum-plastic composite film flexible packaging, and the composition of lithium cobaltate and lithium nickelate in a weight ratio of 2:1 is selected as the positive electrode material , coated on an aluminum mesh to make a positive electrode sheet (5), select soft carbon and hard carbon as the negative electrode material in a ratio of 2:1 by weight, apply it on a copper mesh to make a negative electrode sheet (4), select aluminum foil The sheet is the positive pole tab (1), the nickel foil is the negative pole tab (7), and the shell is equipped with a cylindrical electrode core wound by a diaphragm (3), a negative pole piece, a diaphragm and a positive pole piece. , the two ends and the middle of the electrode core are wound with fixed tape (not shown in the figure), and the two pairs of positive and negative pole tabs protruding from both ends are on the same center line, and the two pairs of positive and negative pole tabs overlap in parallel and are at the same end Connect with a copper sheet, and then connect the two ends to the positive and negative tabs respectively, and the plane of the positive and negative tabs is perpendicular to the sealing edge of the aluminum-plastic composite film. The composite film is heat-sealed, the liquid injection hole (not shown in the figure) is installed on the side of the positive electrode ear, the electrolyte (not shown in the figure) is injected, and it is formed by charging and discharging, vacuumized, and the liquid injection hole is sealed to make a cylindrical aluminum alloy. Plastic composite film soft packaging lithium ion battery.
实施例3Example 3
圆柱铝塑复合膜软包装锂离子蓄电池，由图1所示，壳体(2)为铝塑复合膜软包装圆筒形体，选用镍钴酸锂、钴酸锂和磷酸亚铁锂重量比为2∶0.5∶0.5比例的组合物为正极材料，涂在不锈钢箔上制成正极极片(5)，选用金属锂为负极材料，涂在镍箔上制成负极，用铝箔制成负极极片(4)，选用铝箔片为正极极耳(1)，镍箔片为负极极耳(7)，壳体内装有由隔膜(3)、负极极片、隔膜和正极极片叠加一起卷绕成的圆柱形电极卷芯，电极卷芯外部的两端及中部卷绕固定胶带(图中未示)，三对正、负极极耳在同一中心线上，三对正、负极耳平行重叠后同端用铝片连接，电极卷芯外部的两端及中部卷绕固定胶带(图中未示)，伸出两端的三对正、负极耳呈平行位置，其两端再分别与正、负极极耳连接，且正、负极极耳平面与和铝塑复合膜封边垂直，极耳上热熔胶膜(图中未示)与铝塑复合膜热封，注液孔(图中未示)装在负极极耳一侧，注电解液(图中未示)，经充电、放电化成，抽真空，封注液孔，制成圆柱铝塑复合膜软包装锂离子蓄电池。Cylindrical aluminum-plastic composite film soft-packaged lithium-ion storage battery, as shown in Figure 1, the housing (2) is a cylindrical shape of aluminum-plastic composite film soft-package, and the weight ratio of lithium nickel cobaltate, lithium cobaltate and lithium iron phosphate is 2: The composition with a ratio of 0.5:0.5 is a positive electrode material, coated on a stainless steel foil to make a positive electrode sheet (5), selecting metallic lithium as a negative electrode material, coated on a nickel foil to make a negative electrode, and using an aluminum foil to make a negative electrode sheet (4 ), the aluminum foil is selected as the positive tab (1), the nickel foil is used as the negative tab (7), and the shell is equipped with a cylinder composed of a diaphragm (3), a negative pole piece, a diaphragm and a positive pole piece. Shaped electrode core, the two ends and the middle of the electrode core are wound with fixed tape (not shown in the figure), three pairs of positive and negative pole tabs are on the same center line, and the three pairs of positive and negative pole tabs are overlapped in parallel and used at the same end. The aluminum sheet is connected, and the two ends and the middle of the electrode core are wound with fixed tape (not shown in the figure), and the three pairs of positive and negative tabs protruding from the two ends are in parallel positions, and the two ends are connected to the positive and negative tabs respectively. , and the plane of the positive and negative tabs is perpendicular to the sealing edge of the aluminum-plastic composite film, the hot-melt adhesive film (not shown) on the tab is heat-sealed with the aluminum-plastic composite film, and the liquid injection hole (not shown) is installed Electrolyte (not shown in the figure) is injected into the side of the negative pole ear. After charging and discharging, it is formed, vacuumed, and the injection hole is sealed to make a cylindrical aluminum-plastic composite film soft-packed lithium-ion battery.
实施例4Example 4
圆柱铝塑复合膜软包装锂离子蓄电池，由图1所示，壳体(2)为铝塑复合膜软包装圆筒形体，选用镍酸锂、镍钴锰酸锂和锰酸锂按重量比为1∶0.5∶0.8比例的组合物为正极材料，涂在铝箔上制成正极极片(5)，选用锡合金、硅和石墨重量比为1∶0.8∶0.2比例的组合物为负极材料，涂在不锈钢箔上制成负极极片(4)，选用铝箔片为正极极耳(1)，镍箔片为负极极耳(7)，下同实施例1。Cylindrical aluminum-plastic composite film soft-packaged lithium-ion storage battery, as shown in Figure 1, the shell (2) is a cylindrical body in aluminum-plastic composite film soft-package, and lithium nickelate, nickel-cobalt lithium manganate and lithium manganate are selected in a weight ratio of 1 : The composition with a ratio of 0.5:0.8 is the positive electrode material, and it is coated on the aluminum foil to make the positive electrode sheet (5). The negative pole piece (4) is made on stainless steel foil, the aluminum foil is selected as the positive pole tab (1), and the nickel foil is used as the negative pole tab (7). The same as in Example 1 below.
Claims (4)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101264205A CN100349322C (en) | 2005-12-09 | 2005-12-09 | Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film |
| PCT/CN2006/000797 WO2007065322A1 (en) | 2005-12-09 | 2006-04-26 | Lithium-ion storage battery with flexible external material of cylindric aluminum-plastic laminated film |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101264205A CN100349322C (en) | 2005-12-09 | 2005-12-09 | Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film |
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| CN1808760A true CN1808760A (en) | 2006-07-26 |
| CN100349322C CN100349322C (en) | 2007-11-14 |
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| CN102623667A (en) * | 2011-01-28 | 2012-08-01 | 力佳电源科技(深圳)有限公司 | Soft package thin and ultrathin cell structure and manufacturing method thereof |
| CN105529412A (en) * | 2016-01-06 | 2016-04-27 | 浙江汇同电源有限公司 | Novel storage battery |
| CN108713271A (en) * | 2016-06-27 | 2018-10-26 | 宁德时代新能源科技股份有限公司 | Battery core and the battery for using this battery core |
| CN109449322A (en) * | 2018-12-21 | 2019-03-08 | 河南鼎能电子科技有限公司 | A kind of novel lithium battery with super thin metal shell |
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| WO2023245350A1 (en) * | 2022-06-20 | 2023-12-28 | 宁德新能源科技有限公司 | Electrochemical device and electric device |
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| JP3030263B2 (en) * | 1997-05-09 | 2000-04-10 | 三洋電機株式会社 | Non-aqueous electrolyte secondary battery |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN100349322C (en) | 2007-11-14 |
| WO2007065322A1 (en) | 2007-06-14 |
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