WO2017219699A1 - 大容量电池组安全保护装置 - Google Patents

大容量电池组安全保护装置 Download PDF

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Publication number
WO2017219699A1
WO2017219699A1 PCT/CN2017/075564 CN2017075564W WO2017219699A1 WO 2017219699 A1 WO2017219699 A1 WO 2017219699A1 CN 2017075564 W CN2017075564 W CN 2017075564W WO 2017219699 A1 WO2017219699 A1 WO 2017219699A1
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Prior art keywords
battery
battery pack
protection device
overcurrent protection
large capacity
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PCT/CN2017/075564
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English (en)
French (fr)
Inventor
许祎凡
孟祎凡
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苏州安靠电源有限公司
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Publication of WO2017219699A1 publication Critical patent/WO2017219699A1/zh

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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
    • 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
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • 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
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/106—PTC
    • 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 relates to a large-capacity battery pack safety protection device.
  • a plurality of cylindrical lithium ion batteries are usually combined in parallel by a battery jig to form a large-capacity battery.
  • the battery fixture is made of an insulating material, and a plurality of battery mounting holes are formed thereon, and metal conductive sheets are disposed in each of the battery mounting holes, and the metal conductive sheets are connected to each other through metal and networked.
  • a plurality of cylindrical single cells are respectively inserted into a plurality of battery mounting holes of the battery fixture, and the battery is electrically connected to the corresponding metal conductive sheets, so that the cylindrical single cells are connected in parallel to form A small battery pack.
  • a plurality of small battery packs of such a structure are combined in series and in parallel to form a large-capacity battery pack.
  • a PTC overcurrent protection element is generally disposed in series inside each of the cylindrical batteries, and the PTC overcurrent protection element is generally disposed between the positive electrode post and the positive electrode cap of the battery.
  • the PTC over-current protection component disconnects itself and acts as an overcurrent protection to prevent battery thermal runaway accidents.
  • the PTC overcurrent protection component When the PTC overcurrent protection component works, it generates a certain amount of working heat, and it is arranged inside the battery. The working heat generated by the PTC overcurrent protection component is concentrated in the battery and cannot be dissipated in time, which has a negative impact on the performance of the battery.
  • the object of the present invention is to provide a large-capacity battery pack safety protection device to ensure the safety of a large-capacity battery pack while also ensuring good heat dissipation performance of the large-capacity battery pack.
  • the technical solution of the present invention is: a large-capacity battery pack safety protection device, comprising a battery fixture of an insulating material, a plurality of battery mounting holes formed on the battery fixture, and a plurality of battery mounting holes respectively disposed in each of the battery mounting holes A metal conductive sheet, each of which is provided with a PTC overcurrent protection element.
  • the PTC overcurrent protection element is housed in the battery mounting hole.
  • the cylindrical batteries are respectively inserted into a plurality of battery mounting holes of the large-capacity battery pack safety protection device, and the metal conductive sheets are The PTC overcurrent protection element is connected in series between the cylindrical battery and the metal conductive sheet.
  • the PTC overcurrent protection component is arranged on the metal conductive sheet of the battery fixture, and is assembled with a plurality of cylindrical batteries to form a large-capacity battery pack.
  • the PTC overcurrent protection component is located outside the cylindrical battery instead of inside.
  • the heat generated by the PTC overcurrent protection component can be dissipated in time, and the heat is not accumulated in the battery and the PTC overcurrent protection component, which improves the safety of the battery pack.
  • the heat generated inside the battery does not directly conduct to the PTC overcurrent protection component, so that the PTC overcurrent protection component is in a relatively low temperature loop and a relatively corrosive environment, and the battery pack is also reduced. The complexity of the match.
  • FIG. 1 is a schematic structural view of a conventional cylindrical battery
  • FIG. 2 is a cross-sectional view showing a partial structure of a large-capacity battery pack safety protection device according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view showing the overall structure of a large-capacity battery pack safety protection device according to an embodiment of the present invention
  • FIG. 4 is a cross-sectional structural view showing a battery pack using the safety protection device of the present invention.
  • 1-battery fixture 2-battery mounting hole, 3-metal conductive sheet, 4-PTC overcurrent protection element, 5-cylindrical battery.
  • FIG. 4 show a specific embodiment of the large-capacity battery pack safety protection device of the present invention, which comprises a battery holder 1 of an insulating material, and a plurality of battery mounting holes 2 for the battery holder 1.
  • a plurality of metal conductive sheets 3 provided in each of the battery mounting holes 2, and these metal conductive sheets 3 are connected to each other.
  • each of the metal conductive sheets 3 is provided with a PTC overcurrent protection element 4. Moreover, in this embodiment, the PTC overcurrent protection component 4 is received in the battery mounting hole 2 Inside.
  • the large-capacity battery pack safety protection device of the embodiment when used to connect a plurality of cylindrical batteries 5 in parallel to form a battery pack, the cylindrical batteries 5 are respectively inserted into the large-capacity battery pack for safety protection.
  • the plurality of battery mounting holes 2 of the device, and the PTC overcurrent protection member 4 on the metal conductive sheet 3 are connected in series between the cylindrical battery and the metal conductive sheet 3.
  • the PTC overcurrent protection component 4 is disposed on the metal conductive sheet 3 of the large-capacity battery pack safety protection device, and when assembled with a plurality of cylindrical batteries to form a small battery pack, the PTC overcurrent protection component 4 is located.
  • the outside of the cylindrical battery not the inside, ensures that the heat generated by the PTC overcurrent protection component 4 can be dissipated in time, and the heat does not accumulate in the battery and the PTC overcurrent protection component, which improves the safety of the battery pack.
  • the heat generated inside the battery does not directly conduct to the PTC overcurrent protection component 4, so that the PTC overcurrent protection component 4 is in a relatively low temperature and relatively low corrosive environment, improving the working environment of the PTC component. .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本发明公开了一种大容量电池组安全保护装置，其包括绝缘材质的电池夹具、制于该电池夹具上的若干个电池安装孔、分别设置在各个所述电池安装孔中的若干个金属导电片，每一个所述金属导电片上均设置有PTC过流保护元件。使用本发明这种大容量电池组安全保护装置将多个圆柱形电池装在一起而形成大容量电池组时，单体圆柱形电池自身无需设置PTC过流保护元件，而且使PTC过流保护元件的工作热量能迅速散发出去，保证电池组的使用安全性。

Description

大容量电池组安全保护装置 技术领域
本发明涉及一种大容量电池组安全保护装置。
背景技术
随着电子技术的迅猛发展，高比能量，高性能的圆柱形锂离子电池获得了更广泛的应用。此种电池不仅性能好而且不含有害物质，是绿色电源。它的各个性能几乎都达到了目前电池所能达到的最好的程度。
在实际应用中，为了提高电池容量，通常利用电池夹具将众多圆柱形锂离子电池并联组合在一起而构成大容量的电池。
电池夹具为绝缘材质，其上制有众多电池安装孔，各个电池安装孔中均设置有金属导电片，而且这些金属导电片通过金属并联网相互连接。装配时，将许多根圆柱形单体电池分别插设在电池夹具的众多电池安装孔中，并使电池与对应的金属导电片电性连接，从而使这些圆柱形单体电池并联在一起而形成一个小的电池组。再将多个这种结构的小电池组串并联组合在一起，便形成大容量电池组。
在大容量电池组中，一旦某一根圆柱形电池发生短路，便很容产生热失控而引起电池起火。
参照图1所示，为了消除上述安全隐患，通常在每根圆柱形电池的内部串连设置PTC过流保护元件，该PTC过流保护元件一般布置在电池的正极柱和正极盖帽之间。当某根电池发生短路故障时，PTC过流保护元件便自行断开而起到过流保护作用，防止电池热失控事故的发生。
PTC过流保护元件工作时会产生一定的工作热量，而其布置在电池的内部， 导致PTC过流保护元件的工作产热被聚焦在电池内，不能及时散发出去，对电池的性能造成负面影响。
发明内容
本发明目的是：为了克服上述问题，提供一种大容量电池组安全保护装置，以保证大容量电池组使用安全性的同时，还使得大容量电池组具有良好的散热性能。
本发明的技术方案是：一种大容量电池组安全保护装置，包括绝缘材质的电池夹具、制于该电池夹具上的若干个电池安装孔、分别设置在各个所述电池安装孔中的若干个金属导电片，每一个所述金属导电片上均设置有PTC过流保护元件。
作为优选，所述PTC过流保护元件收容于所述电池安装孔内。
本发明的优点是：
1、利用本发明将众多圆柱形电池串并联在一起而形成一个大容量电池组时，这些圆柱形电池分别对应插入该大容量电池组安全保护装置的众多电池安装孔中，而且金属导电片上的PTC过流保护元件串接在圆柱形电池和金属导电片之间。一旦某一根圆柱形电池发生短路事故，由于该电池温度在短路中迅速上升，对应的PTC过流保护元件便会迅速断开，从而使该根电池从电路中及时隔离，防止电池安全事故发生。
2、本发明将PTC过流保护元件布置在电池夹具的金属导电片上，与众多圆柱形电池配合组装而形成大容量电池组时，PTC过流保护元件位于圆柱形电池的外部而非内部，保证PTC过流保护元件工作时产生的热量能够及时散发出去，热量不会在电池和PTC过流保护元件中大量聚集，提高了电池组的安全性。而且电池工作时其内部产生的热量不会直接向PTC过流保护元件传导，使PTC过流保护元件处在相对较低的温度环和较低腐蚀性环境中，也减少了单体电池装 配的复杂程度。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为传统圆柱形电池的结构示意图；
图2为本发明实施例中大容量电池组安全保护装置的局部结构剖视图；
图3为本发明实施例中大容量电池组安全保护装置的整体结构剖视图；
图4为采用本发明这种安全保护装置的电池组的剖视结构示意图；
其中：1-电池夹具，2-电池安装孔，3-金属导电片，4-PTC过流保护元件，5-圆柱形电池。
具体实施方式
以下结合具体实施例对上述方案做进一步说明。应理解，这些实施例是用于说明本发明而不限于限制本发明的范围。实施例中采用的实施条件可以根据具体厂家的条件做进一步调整，未注明的实施条件通常为常规实验中的条件。
图2～图4示出了本发明这种大容量电池组安全保护装置的一个具体实施例，其包括绝缘材质的电池夹具1、制于该电池夹具1上的若干个电池安装孔2、分别设置在各个所述电池安装孔2中的若干个金属导电片3，并且这些金属导电片3相互连接。
本实施例的关键改进在于：每一个所述金属导电片3上均设置有PTC过流保护元件4。而且本实施例将所述PTC过流保护元件4收容于所述电池安装孔2 内。
参照图4所示，利用本实施例这种大容量电池组安全保护装置将众多圆柱形电池5并联在一起而形成一电池组时，这些圆柱形电池5分别对应插入该大容量电池组安全保护装置的众多电池安装孔2中，而且金属导电片3上的PTC过流保护元件4串接在圆柱形电池和金属导电片3之间。一旦某一根圆柱形电池发生短路事故，温度急剧升高，对应的PTC过流保护元件4便会迅速断开，从而使该根电池从电路中及时隔离，防止电池安全事故发生。
可见，本实施例将PTC过流保护元件4布置在该大容量电池组安全保护装置的金属导电片3上，与众多圆柱形电池配合组装而形成小电池组时，PTC过流保护元件4位于圆柱形电池的外部而非内部，保证PTC过流保护元件4工作时产生的热量能够及时散发出去，热量不会在电池和PTC过流保护元件中大量聚集，提高了电池组的安全性。而且电池工作时其内部产生的热量不会直接向PTC过流保护元件4传导，使PTC过流保护元件4处在相对较低的温度及相对低腐蚀性环境中，改善了PTC元件的工作环境。
上述实施例只为说明本发明的技术构思及特点，其目的在于让人们能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明主要技术方案的精神实质所做的等效变换或修饰，都应涵盖在本发明的保护范围之内。

Claims (2)

  1. 一种大容量电池组安全保护装置，包括绝缘材质的电池夹具(1)、制于该电池夹具(1)上的若干个电池安装孔(2)、分别设置在各个所述电池安装孔(2)中的若干个金属导电片(3)，其特征在于：每一个所述金属导电片(3)上均设置有PTC过流保护元件(4)。
  2. 根据权利要求1所述的大容量电池组安全保护装置，其特征在于：所述PTC过流保护元件(4)收容于所述电池安装孔(2)内。
PCT/CN2017/075564 2016-06-23 2017-03-03 大容量电池组安全保护装置 WO2017219699A1 (zh)

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CN105914330A (zh) * 2016-06-23 2016-08-31 苏州安靠电源有限公司 大容量电池组安全保护装置
CN206040787U (zh) * 2016-06-23 2017-03-22 苏州安靠电源有限公司 大容量电池组安全保护装置

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