WO2003067700A1 - Lithium secondary battery having internal protection circuit - Google Patents

Lithium secondary battery having internal protection circuit Download PDF

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Publication number
WO2003067700A1
WO2003067700A1 PCT/CN2002/000793 CN0200793W WO03067700A1 WO 2003067700 A1 WO2003067700 A1 WO 2003067700A1 CN 0200793 W CN0200793 W CN 0200793W WO 03067700 A1 WO03067700 A1 WO 03067700A1
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WO
WIPO (PCT)
Prior art keywords
battery
protection circuit
lithium secondary
secondary battery
lithium
Prior art date
Application number
PCT/CN2002/000793
Other languages
English (en)
French (fr)
Inventor
Chuanfu Wang
Yueqing Yan
Haishan Yang
Original Assignee
Byd Company Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Byd Company Limited filed Critical Byd Company Limited
Priority to US10/504,070 priority Critical patent/US7701169B2/en
Priority to AU2002349724A priority patent/AU2002349724A1/en
Priority to JP2003566932A priority patent/JP2005517274A/ja
Priority to EP02781054A priority patent/EP1507306A4/en
Publication of WO2003067700A1 publication Critical patent/WO2003067700A1/zh

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Classifications

    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • 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 present invention relates to a lithium secondary battery, and more particularly to a protection circuit built into a battery cavity. Background technique
  • lithium secondary batteries are often used instead of alkaline secondary batteries such as nickel metal hydride and nickel cadmium as their power supply.
  • alkaline secondary batteries such as nickel metal hydride and nickel cadmium
  • the short-circuit current passing through the battery is very large, which may cause the battery body to become hot and even cause the battery to explode.
  • a well-known method for example, Chinese patent CN1197534A discloses a battery using a PTC element.
  • the PTC element has a small resistance during normal charging.
  • the protection circuit detects that the external circuit of the battery is disconnected, and then cuts off the connection between the battery and the external power cord to prevent short circuit.
  • the protection circuit can fully exclude the battery short circuit caused by the short circuit between the external power lines;
  • Chinese patent ZL01235497X discloses an alkaline secondary battery with a short-circuit protection function. A thin neck, a hole shape, a mesh shape, or a defective portion of the above combination is provided in an electrode conductive terminal made of materials such as nickel, tin, copper, lead and the like.
  • the conductive terminal When the short-circuit current is greater than 30 amps, the conductive terminal can be blown in 0-2 seconds, thereby avoiding the danger of battery overheating, explosion, and leakage caused by short-term short-term battery pack.
  • the inventor's research found that the technology disclosed in the above patent is mainly applied to cadmium-nickel, hydrogen-nickel and other electric toys and power tool battery packs. When it is applied to lithium secondary batteries, the following disadvantages mainly exist: (1) safety The reliability of the protection performance is lowered, because the physical properties of the materials are mainly used to control the reliability reduction. (2) Occupying a certain external capacity, the battery capacity of the same volume of battery blocks will decrease. Summary of the Invention
  • An object of the present invention is to overcome the above-mentioned drawbacks and provide a lithium secondary battery with a simple structure, a built-in protection circuit and reliable safety protection performance.
  • the invention provides a lithium secondary battery with a built-in protection circuit.
  • the lithium secondary battery includes a battery case (1), a battery core (2) composed of a positive electrode plate, a separator, and a negative electrode layer stacked, and an electrolyte.
  • the protection circuit module (4) built into the battery cavity is designed in the connection between the negative electrode terminals (21, 22) and the positive and negative output terminals (31, 32) of the battery, and the protection circuit module (4) can detect and control Overcharge, overdischarge, and overcurrent of the battery.
  • the protection circuit module (4) includes an integrated circuit and a field effect tube, and is manufactured by a bonding technology (COB); more preferably, the protection circuit module (4) has three pins, which are respectively connected to the positive and negative terminals (21, 22) and the positive and negative output terminals (31, 32) of the battery; further preferably, the VDD terminal of the integrated circuit in the protection circuit module (4) is a pin (411), which is connected to the positive terminal (21) and the positive output of the battery Terminal (31); VSS terminal is pin (412), connected to negative terminal (22); DO or CO terminal is connected to the field effect tube and exported through the field effect tube as pin (421), and connected to the battery negative output terminal (32) ) Connect.
  • COB bonding technology
  • the positive electrode contains lithium-containing materials such as lithium cobalt oxide, lithium nickel oxide, and lithium manganese oxide that reversibly intercalate or deintercalate lithium ions;
  • the negative electrode includes natural graphite, artificial graphite, coke, etc.
  • the protection circuit module is encapsulated by a material resistant to electrolyte corrosion to be isolated from the electrolyte.
  • the shape of the lithium secondary battery may be a cylindrical body, a rectangular body, or a thin body.
  • the common lithium secondary batteries do not have a built-in protection circuit module.
  • the present invention is to design a protection circuit module inside the battery cell, which has the following characteristics compared with ordinary batteries:
  • each battery must be equipped with a circuit board with a protective function, occupying a certain volume, that is, sacrificing the capacity of the battery, and the protection used by safe and intelligent lithium batteries.
  • the circuit module uses COB (Chip On Board) technology, which can be made very small.
  • COB Chip On Board
  • the shape can be designed according to the battery case and internal structure, and it acts as a connection inside, occupying only a small volume.
  • the internal volume of the battery block is relatively increased.
  • the battery capacity has also increased.
  • FIG. 1 is a schematic diagram of an internal structure of a lithium secondary battery with a built-in protection circuit according to the present invention
  • FIG. 2 is a working principle diagram of a lithium secondary battery with a built-in protection circuit according to the present invention.
  • the electrode manufacturing method is conventional:
  • the positive electrode sheet According to 83 wt% of lithium cobalt oxide (LiCo0 2 ) active material, 8 wt% of acetylene black conductive material, 4 wt% of polyvinylidene fluoride (PVdF) binder, 5 wt% of N -Methylpyrrolidone (NMP) solvent preparation slurry, the obtained slurry is coated on a current collector aluminum foil; heating to remove excess solvent; pressing with a roller press to a certain thickness; finally cutting into rectangular electrodes of the required size Slice or Long pole piece
  • negative electrode sheet The slurry is prepared according to 90 wt% natural graphite carbonaceous material, 5 wt% PVdF, and 5 wt% NMP solvent. They are dissolved in NMP solvent and stirred by a mixer to obtain a uniform slurry. Coated on a copper foil current collector, heated to remove excess solvent, pressed with a roller press to a certain thickness, and finally cut into rectangular or long pole pieces that match the positive electrode piece
  • the positive electrode sheet and the negative electrode sheet are respectively welded with conductive terminals and stacked with a separator to form a battery cell.
  • the battery case 1 is connected to a cover plate (not labeled in the figure) to serve as a positive electrode output terminal 31 of the battery.
  • the cap which is separated from the cover plate by polystyrene, serves as the battery negative output terminal 32, and the VDD terminal of the integrated circuit (not labeled in the figure) in the protection circuit module 4 is the pin 411, which is connected to the battery cell 2 Positive terminal 21, battery positive output terminal 31; VSS terminal is pin 412, and the negative terminal 22 is derived from cell 2.
  • the DO or CO terminal is connected to the field effect tube (not numbered in the figure) and is exported through the field effect tube as Pin 421 is connected to the negative output terminal 32 of the battery;
  • the positive and negative terminals and the pins of the protection circuit module 411, 412, 421 are preferably made of nickel, copper, aluminum sheet or wire.
  • the integrated circuit also called control IC in the figure] plays a detection and control role, and the field effect transistor [also called MOSFET in the picture] plays a switching role;
  • the VDD terminal of the control IC is a pin 411, Connect positive terminal 21 [also called positive in the figure], battery positive output terminal 31 [also called B + in the picture];
  • VSS terminal is pin 412, connect to negative terminal 22 [also called negative in the picture];
  • the control IC When the battery voltage is detected to be greater than the overcharge detection voltage or less than the overdischarge detection voltage, the control IC will send a low-level control MOSFET to its CO or DO pin, and the MOSFET will turn off the negative and battery negative output terminals (32) [Figure The connection is also known as B-], which achieves protection when the battery is overcharged or overdischarged.
  • the same protection circuit also has overcurrent protection and short circuit protection.
  • the battery power supply current is too large, it will be in negative and B A voltage drop occurs between-, and when the IC detects it, it will also drive the MOSFET to turn off the connection between negative and B-.
  • the protection circuit module of the invention adopts the COB (CWp On Board) technology, which can be made very small, the shape can be designed according to the battery case and the internal structure, and acts as a connection inside, occupying only a small volume, and the content of the battery block is relatively increased. Large, the corresponding battery capacity is also increased; positive and negative short circuit, overcharge, overdischarge, overcurrent are all protected, safety and reliability are greatly improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Protection Of Static Devices (AREA)
  • Battery Mounting, Suspending (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Description

内置保护电路的锂二次电池 技术领域
本发明涉及一种锂二次电池，更具体地说是涉及内置于电池腔体的保 护电路。 背景技术
在手机、 手提式电脑等便携式通讯产品中， 常采用锂二次电池代替镍 氢、 镍镉等碱性二次电池作为其供给电源。 当电池外部电路短路时通过电 池的短路电流很大， 易引起电池体发热发烫、 甚至有电池爆炸的危险； 为 避免电池组外部短路时发生上述危险， 需要在电池组短路时及时切断电 流。公知的方法， 例如， 中国专利 CN1197534A公开了一种使用 PTC元件 的电池， PTC元件在正常充电时电阻较小， 当电池在短路时， 通过 PTC元 件的电流很大，使 PTC元件在短时间内温度急剧升高，到一定温度时， PTC 元件电阻突然升高， 此时电路接近于断路状态， 当 PTC元件温度降下来以 后， 其电阻又回到低阻状态， 电路又可导通， 使用这种 PTC元件可以使电 池在外部短路时快速断开， 且可耐多次短路电流冲击； 又如， 中国专利 CN1177217A公开了一种具有电池保护.电路的电池， 以防止电池外部短路 时对电池造成损害， 此保护电路可对电池状态进行检测， 当电池与所接电 子装置分开时， 保护电路检测到电池外部电路己断开， 则切断电池与外部 电源线的连接， 以防止短路， 使用这种保护电路可充分排除电池由于外部 电源线之间相互短接造成的电池短路；又如， 中国专利 ZL01235497X公开 了一种具有短路保护功能的碱性二次电池， 通过在镍、 锡、 铜、 铅等材料 制备的电极导电端子设置细颈、 孔状、 网状、 或者上述组合的缺陷部分， 在大于 30安培的短路电流时， 导电端子能够在 0-2秒内熔断， 从而避免电 池组长时间短路造成电池过热及发生爆炸、 漏液等危险。 本发明人的研究发现， 上述专利公开的技术主要应用于镉 -镍、 氢-镍 等电动玩具、 电动工具电池组， 将之应用于锂二次电池时， 主要存在以下 不足： （1)安全保护性能可靠性降低， 由于主要利用材料的物理性质来控 制使可靠性降低； （2)占用一定的外部容间， 就相同体积的电池块而言， 相应的电池容量会降低。 发明内容
本发明的目的在于克服上述缺陷而提供一种结构简单的、安全保护性 能可靠的内置保护电路的锂二次电池。
本发明提供的一种内置保护电路的锂二次电池， 包括电池壳 (1)， 由 正极板、 隔膜、 负极板叠置组成的电芯 (2)以及电解质， 其特征是： 在电 池的正、 负极端子 (21、 22)与电池的正、 负极输出端 (31、 32)的连接中设 计内置于电池腔体的保护电路模块 (4)， 所述保护电路模块 (4)能检测和控 制电池的过充电、 过放电、 过电流。
优选所述保护电路模块 (4)包括集成电路和场效应管， 采用邦定技术 (COB)制作； 更优选所述保护电路模块 (4)有三个引脚， 分别与正、 负极端 子 (21、 22)及电池正、 负极输出端 (31、 32)连接； 进一步优选所述保护电 路模块 (4)中的集成电路的 VDD端为引脚 (411)， 连接正极端子 (21)、 电池 正极输出端 (31); VSS端为引脚 (412)， 连接负极端子 (22); DO或 CO端 与场效应管连接并经场效应管导出为引脚 (421)， 与电池负极输出端 (32) 连接。
所述的正极含有锂钴氧化物、锂镍氧化物、锂锰氧化物等可逆性地嵌 入或脱嵌锂离子的含锂材料； 负极含有天然石墨、人造石墨、焦碳等可逆 性地嵌入或脱嵌锂离子的碳素材料； 并且其中电解质是非水液体电解质、 固体电解质或凝胶体电解质。 所述保护电路模块由防电解液腐蚀的材料封装以与电解液隔离。 所述锂二次电池形状可以是圆柱体、 方形体或薄形体。
目前常见的锂二次电池，都没有内置保护电路模块，本发明是在电芯 内部设计一保护电路模块， 这与通常的电池相比有如下特点：
安全可靠性提高
目前常见的锂电池在正负极短路、过充电时， 存在安全隐患， 在过放 电、 过电流时， 会影响电池的电性能， 但本发明在正负极短路、 过充电、 过放电、 过电流等情况下都进行了保护， 安全性、 可靠性大大提高。
电池容量提高
目前手机电池块越做越小， 由于锂电池的特性，每块电池必须配备一 个有保护功能的电路板， 占用一定的体积， 也就是牺牲了电池的容量， 而 安全智能型锂电池所用的保护电路模块采用 COB(Chip On Board)技术， 可以做得很小，形状可根据电池外壳及内部构造设计，且在内部充当联接， 只占很小的容积， 电池块内容积相对增大， 相应的电池容量也增大。 附图的简要说明
图 1为本发明内置保护电路的锂二次电池内部结构示意图； 图 2为本发明内置保护电路的锂二次电池工作原理图。 具体实施方式
以下结合附图说明本发明的具体实施方式：
以 48 X 30 X 5(mm)电池型号为例， 电极制作采用常规方法：
1、 正极片制作： 按 83wt%的锂钴氧化物 (LiCo02)活性物质， 8 wt%的 乙炔黑导电材料， 4 wt%的聚偏氟乙烯 (PVdF)粘合剂， 5 wt%的 N-甲基吡 咯垸酮 (NMP)溶剂配制浆料， 所得浆料涂覆在集流体铝箔上； 加热除去多 余的溶剂；用辊压机压成一定的厚度； 最后裁剪成所需尺寸的矩形极片或 长条形极片；
2、 负极片制作： 按 90 wt%天然石墨碳质材料， 5 wt%PVdF粘结齐 lj， 5 wt%NMP溶剂配制浆料， 它们被溶解在 NMP溶剂中， 经搅拌机搅拌得 到均匀浆料，涂覆在铜箔集流体上，加热除去多余的溶剂后用辊压机压成 一定的厚度， 最后裁剪成与正极片匹配的矩形极片或长条形极片；
将正极片、 负极片分别焊接导电端子后， 与隔膜叠置组成电芯； 如附图 1所示， 电池壳 1与盖板 (图中未标示编号)悍接相连充当电池 正极输出端 31， 由聚苯乙烯将之与盖板隔离开的盖帽充当电池负极输出 端 32， 保护电路模块 4中的集成电路 (图中未标示编号)的 VDD端为引脚 411， 连接由电芯 2导出的正极端子 21、 电池正极输出端 31 ; VSS端为 引脚 412, 连接由电芯 2导出负极端子 22; DO或 CO端与场效应管 (图中 未标示编号)连接并经场效应管导出为引脚 421， 与电池负极输出端 32连 接；
正、 负极端子及保护电路模块引脚 411、 412、 421优选采用镍、 铜、 铝片材或线材。
如附图 2所示,集成电路 [图中亦称为 control IC ]起着检测及控制作用， 场效应管 [图中亦称为 MOSFET]起开关作用； control IC的 VDD端为引脚 411， 连接正极端子 21 [图中亦称为 positive]、 电池正极输出端 31 [图中亦称 为 B+]； VSS端为引脚 412，连接负极端子 22 [图中亦称为 negative]；当 control IC 检测到电池电压大于过充电检测电压或小于过放电检测电压时， control IC会给其 CO或 DO脚送出低电平控制 MOSFET, 则 MOSFET就会关断 negative与电池负极输出端 (32) [图中亦称为 B-]的连接，从而就实现了当电 池过充电或过放电时的保护， 同样保护电路还具有过电流保护和短路保 护， 当电池供电电流过大时， 会在 negative和 B-之间产生压降， 当 IC检 测到时， 也会驱动 MOSFET关断 negative与 B-的连接。 本发明的保护电路模块采用 COB(CWp On Board)技术， 可以做得很 小， 形状可根据电池外壳及内部构造设计， 且在内部充当联接， 只占很小 的容积， 电池块内容积相对增大， 相应的电池容量也增大； 正负极短路、 过充电、 过放电、 过电流都进行了保护， 安全性、 可靠性大大提高。

Claims

权利要求书
1、 一种内置保护电路的锂二次电池， 包括电池壳 (1)， 由正极板、 隔 膜、 负极板叠置组成的电芯 (2)以及电解质， 其特征是： 在电池的正、 负 极端子 (21、 22)与电池的正、 负极输出端 (31、 32)的连接中设计内置于电 池腔体的保护电路模块 (4)， 所述保护电路模块 (4)能检测和控制电池的过 充电、 过放电、 和过电流。
2、 根据权利要求 1所述的锂二次电池， 其特征是： 所述保护电路模 块 (4)包括集成电路和场效应管， 采用邦定技术 (COB)制作。
3、 根据权利要求 1或 2所述的锂二次电池， 其特征是： 所述保护电 路模块 (4)有三个引脚， 分别与正、 负极端子 (21、 22)及电池正、 负极输出 端 (31、 32)连接。
4、 根据权利要求 3所述的锂二次电池， 其特征是： 所述保护电路模 块 (4)中的集成电路的 VDD端为引脚 (411)， 连接正极端子 (21)、 电池正极 输出端 (31); VSS端为引脚 (412)， 连接负极端子 (22); DO或 CO端与场效 应管连接并经场效应管导出为引脚 (421)， 与电池负极输出端 (32)连接。
5、 根据权利要求 1所述的锂二次电池， 其特征是： 所述的正极含有 锂钴氧化物、 锂镍氧化物、 锂锰氧化物等可逆性地嵌入或脱嵌锂离子的含 锂材料； 负极含有天然石墨、 人造石墨、 焦碳等可逆性地嵌入或脱嵌锂离 子的碳素材料； 并且其中电解质是非水液体电解质、 固体电解质或凝胶体 电解质。
6、 根据权利要求 1所述的锂二次电池， 其特征是： 所述保护电路模 块由防电解液腐蚀的密封材料封装以与电解液隔离。
7、 根据权利要求 1所述的锂二次电池， 其特征是： 所述锂二次电池 的形状可以是圆柱体、 方形体或薄形体。
PCT/CN2002/000793 2002-02-04 2002-11-07 Lithium secondary battery having internal protection circuit WO2003067700A1 (en)

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US10/504,070 US7701169B2 (en) 2002-02-04 2002-11-07 Lithium secondary battery having internal protection circuit
AU2002349724A AU2002349724A1 (en) 2002-02-04 2002-11-07 Lithium secondary battery having internal protection circuit
JP2003566932A JP2005517274A (ja) 2002-02-04 2002-11-07 内蔵保護回路を有するリチウム二次電池
EP02781054A EP1507306A4 (en) 2002-02-04 2002-11-07 LITHIUM SECONDARY BATTERY WITH INTERNAL PROTECTION

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CN02225529U CN2525687Y (zh) 2002-02-04 2002-02-04 内置保护电路的锂二次电池

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JP2005517274A (ja) 2005-06-09
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US20080254344A1 (en) 2008-10-16
US7701169B2 (en) 2010-04-20
EP1507306A4 (en) 2005-09-07
AU2002349724A1 (en) 2003-09-02

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