WO2017129146A1 - Parallelly connected grid having safety protection feature and high capacity battery using said parallelly connected grid - Google Patents

Parallelly connected grid having safety protection feature and high capacity battery using said parallelly connected grid Download PDF

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Publication number
WO2017129146A1
WO2017129146A1 PCT/CN2017/075635 CN2017075635W WO2017129146A1 WO 2017129146 A1 WO2017129146 A1 WO 2017129146A1 CN 2017075635 W CN2017075635 W CN 2017075635W WO 2017129146 A1 WO2017129146 A1 WO 2017129146A1
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Prior art keywords
battery
connecting piece
fuse
cell
function according
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PCT/CN2017/075635
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French (fr)
Chinese (zh)
Inventor
许玉林
王爱淑
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苏州安靠电源有限公司
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Publication of WO2017129146A1 publication Critical patent/WO2017129146A1/en

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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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • 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
    • H01M50/597—Protection against reversal of polarity
    • 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
    • H01M2200/30—Preventing polarity reversal
    • 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 network with a security protection function and a large-capacity battery using the same, which belongs to the technical field of safety protection and control of lithium battery packs.
  • Lithium-ion batteries are the newest battery types with the highest energy, longest cycle life and no harmful substances. Many of its features have reached the highest level of traditional battery products. Therefore, it has been widely used, from small to mobile phones and toys, to automotive power modules and power storage power sources, there are markets everywhere. But it also has its own short board, which is a security risk. Such batteries have high energy storage and use organic electrolytes, and there is a danger of fire and explosion. Various battery manufacturers and research and design units have taken various measures to improve their safety and achieved good results. But there is no fundamental solution. Security issues remain a key issue in module design and manufacturing.
  • the large-capacity battery module (or battery pack) generally includes a battery fixture, a plurality of cell mounting holes formed on the battery fixture, a plurality of elastic pieces placed in each of the cell mounting holes, and a plurality of plugs inserted in the respective cell mounting holes.
  • a battery cell ie, a small-capacity battery as described above
  • the interconnection includes a plurality of cell connection pads disposed on the same plane and spaced apart from each other, and connected to A plurality of connecting pieces between the respective battery connecting pads, wherein the respective cell connecting pads are correspondingly arranged in the respective cell mounting holes and connected to the corresponding cells, thereby connecting the respective cells of the same layer in parallel.
  • the object of the present invention is to provide a security-protected parallel network and a large-capacity battery using the same to quickly isolate a battery cell with a short-circuit fault in a large-capacity battery, thereby effectively protecting a large capacity.
  • the technical solution of the present invention is: a networking with security protection function, comprising a plurality of cell connection pads arranged on the same plane and spaced apart from each other, and a plurality of connections connected between the cell connection pads Each of the connecting pieces is provided with a fuse protection structure capable of being blown by a high temperature.
  • the connecting piece is a fuse, and the fuse forms the fuse protection structure.
  • the fuse protection structure is formed by reducing the width of the connecting piece.
  • a circular hole is formed in a middle portion of the connecting piece to form the fuse protection structure.
  • An arcuate opening is formed in one side of the width direction of the connecting piece to form the fuse protection structure.
  • the curved opening is a semicircular structure.
  • An arcuate notch is formed on each side of the width direction of the connecting piece to form the fuse protection structure.
  • the curved notch is a semi-circular structure, and the two arc-shaped notches are staggered in the longitudinal direction of the connecting piece.
  • the large-capacity battery disclosed in the present invention comprises a battery fixture, a battery mounting hole formed in the battery fixture, a spring piece disposed in the battery core mounting hole, and is inserted in the battery core mounting hole.
  • the battery cell further includes the above-mentioned parallel networking, wherein a connecting piece arrangement slot is defined between the adjacent two battery core mounting holes on the battery fixture, and the parallel connected battery core connection pad is arranged.
  • the battery core is mounted in the hole and connected to the battery core, and the interconnection piece is arranged in the connection
  • the tabs are arranged in the slots.
  • An advantage of the present invention is that the present invention is provided with a fuse protection structure capable of being blown by a high temperature on each of the connection sheets of the interconnection.
  • FIG. 1 is an exploded view of a large-capacity battery in the first embodiment of the present invention
  • FIG. 2 is an assembled view of a large-capacity battery in the first embodiment of the present invention
  • FIG. 3 is an assembled view of a networked connection in the first embodiment of the present invention.
  • Figure 4 is an enlarged view of a portion A of Figure 3;
  • FIG. 5 is a schematic partial structural diagram of a networked connection according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic partial structural diagram of a networked connection according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic partial structural diagram of a networked connection in Embodiment 4 of the present invention.
  • 1-battery clamp 2-spring, 3-and network, 4-cell, 5-round, 6-arc gap, 7-arc gap, 9-fuse, 10-cell mounting hole, 10a - Connection piece arrangement groove.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the large-capacity battery of the present invention Like the conventional large-capacity battery, it also includes a battery holder 1, and a plurality of cell mounting holes formed in the battery holder. 10. A plurality of elastic pieces 2 respectively disposed in the respective cell mounting holes, and a plurality of battery cells 4 respectively inserted in the cell mounting holes, and a parallel network 3.
  • the network 3 includes a plurality of cell connection pads arranged on the same plane and spaced apart from each other, and a plurality of connecting pieces connected between the cell connection pads, wherein the respective cell connection pads are correspondingly arranged in the respective cells.
  • the core is mounted in the hole and connected to the corresponding cell, so that the individual cells on the same layer in Fig. 1 are connected in parallel, and the cell is a cylindrical lithium ion cell.
  • each of the connecting pieces 3b is provided with a fuse protection structure capable of being blown by a high temperature.
  • connection piece arrangement groove 10a is formed between the adjacent two cell mounting holes 10 on the battery holder 1, and each connection piece on the parallel network 3b are respectively arranged in these tab arrangement grooves 10a.
  • the fuse protection structure is formed by reducing the width of the connecting piece 3b.
  • a circular hole 5 is formed in the middle of the connecting piece 3b, so that the width of the connecting piece 3b at the circular hole 5 is greatly reduced and the electric resistance is increased.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the structure and working principle of the large-capacity battery of this embodiment are similar to those of the first embodiment.
  • the only difference is that the specific structural form of the fuse protection structure in this embodiment is different from that of the first embodiment.
  • an arcuate slit 6 is formed on one side in the width direction of the connecting piece 3b, thereby forming the fuse protection structure.
  • the curved opening 6 has a semicircular structure.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the structure and working principle of the large-capacity battery of this embodiment are similar to those of the first embodiment.
  • the only difference is that the specific structural form of the fuse protection structure in this embodiment is different from that of the first embodiment.
  • an arcuate notch 7 (two in total) is formed on both sides in the width direction of the connecting piece 3b, thereby forming the fuse protection structure.
  • the two curved arc-shaped notches 7 are also semi-circular structures, and the size thereof is smaller than the size of the arc-shaped slits 6 in the second embodiment.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the structure and working principle of the large-capacity battery of this embodiment are similar to those of the first embodiment.
  • the only difference is that the specific structural form of the fuse protection structure in this embodiment is different from that of the first embodiment.
  • the connecting piece 3b is entirely a fuse 9, that is, the connecting piece 3b is formed by a common fuse, and the fuse 9 itself forms the fuse protecting structure.
  • the width of the connecting piece 3b is reduced, and the resistance at the width reduction is increased (the current generated by the connecting piece 3b is greater when the current passes).
  • the heat generation in other parts, and the size of the place is also smaller, and is more easily blown, thereby forming the fuse protection structure.

Abstract

A parallelly connected grid (3) having a safety protection feature and a high capacity battery using said parallelly connected grid (3). The parallelly connected grid (3) comprises several battery cell connection pads (3a) disposed on a same plane and at intervals, and several connection pieces (3b) connected between the battery cell connection pads (3a), each connection piece (3b) being provided with a fuse protection structure that melts under high temperature. The present invention rapidly isolates the battery cell in a high capacity battery that is experiencing a short circuit malfunction, thereby effectively protecting other battery cells in the high capacity battery and preventing battery accidents.

Description

具有安全保护功能的并联网和使用该并联网的大容量电池Networked with security protection and large-capacity battery using the connected network 技术领域Technical field
本发明涉及一种具有安全保护功能的并联网以及使用该并联网的大容量电池，属于锂电池组安全防控技术领域。The invention relates to a network with a security protection function and a large-capacity battery using the same, which belongs to the technical field of safety protection and control of lithium battery packs.
背景技术Background technique
锂离子电池是当今比能量最高，循环寿命最长，又不含有害物质的新型蓄电池品种。它的许多特性都达到了历来电池产品的最高水平。所以得到了日益广泛的应用，从小到手机和玩具，大到汽车动力模块和电站储能电源，处处都有它的市场。但是它也有自己的短板，就是安全隐患。此类电池储存能量高，又使用有机电解液，从根本上存在着起火爆炸的危险。各电池生产厂和科研设计单位都采取多种措施提高其安全性，取得了很好的效果。却没有根本解决。安全问题仍是模块设计制造的重点问题。Lithium-ion batteries are the newest battery types with the highest energy, longest cycle life and no harmful substances. Many of its features have reached the highest level of traditional battery products. Therefore, it has been widely used, from small to mobile phones and toys, to automotive power modules and power storage power sources, there are markets everywhere. But it also has its own short board, which is a security risk. Such batteries have high energy storage and use organic electrolytes, and there is a danger of fire and explosion. Various battery manufacturers and research and design units have taken various measures to improve their safety and achieved good results. But there is no fundamental solution. Security issues remain a key issue in module design and manufacturing.
大电池模块往往需要很大的容量，仅用单只大电池串联通常是达不到要求的，总要由很多个小容量电池并联联接后再串联成组。在并联时用连接片或并联网将每一个小容量电池连起，构成一个大容量电池。Large battery modules often require a large capacity. It is usually not possible to connect a single large battery in series. It is always connected by a plurality of small-capacity batteries in parallel and then connected in series. When connecting in parallel, connect each small-capacity battery with a connecting piece or a network to form a large-capacity battery.
大容量电池模块(或称电池组)一般包括电池夹具、制于电池夹具上的众多电芯安装孔、置于各个电芯安装孔中的众多弹片、插设在各个电芯安装孔中的众多电芯(即上述的小容量电池)、以及将处于同一层的各个电芯并联连接的并联网，其中，并联网包括布置在同一平面上且相互间隔分布的众多电芯连接垫、以及连接在各电芯连接垫之间的众多连接片，所述的各个电芯连接垫对应布置在各个电芯安装孔中并与相应的电芯相连，从而将同一层的各个电芯并联起来。The large-capacity battery module (or battery pack) generally includes a battery fixture, a plurality of cell mounting holes formed on the battery fixture, a plurality of elastic pieces placed in each of the cell mounting holes, and a plurality of plugs inserted in the respective cell mounting holes. a battery cell (ie, a small-capacity battery as described above), and a network in which respective cells in the same layer are connected in parallel, wherein the interconnection includes a plurality of cell connection pads disposed on the same plane and spaced apart from each other, and connected to A plurality of connecting pieces between the respective battery connecting pads, wherein the respective cell connecting pads are correspondingly arranged in the respective cell mounting holes and connected to the corresponding cells, thereby connecting the respective cells of the same layer in parallel.
上述并联联接的小容量电池(即电芯)的电压都是经过仔细挑选均衡过的，并联在一起时并没有明显的互充电流。但是，一旦有一只电芯出现内部短路，它的电压就降到接近0V，与其他并联在一起的电芯产生了很大的电压差，周围的电芯就给它充电。由于此类电芯内阻 很低仅有几个毫欧到几十个毫欧，在3V左右的电压差推动下，其反充电流是可观的。本来此电池的电压下降，短路电流也应下降，短路的发热量也应下降。却因为巨大的反充电流使发热继续或加剧。这不仅是这一个电池发热，周围电池也因输出反充电电流也同样发热。这样，反复循环推动，发热越加严重，甚至出现热失控，引起火灾。所以如何阻止出现高反充电流，保护周围电芯就成为一个提高电池安全性的重要的问题。The voltages of the above-mentioned parallel connected small-capacity batteries (ie, the cells) are carefully selected and equalized, and there is no significant mutual charge flow when connected in parallel. However, once an internal core is short-circuited, its voltage drops to near 0V, and the other cells in parallel create a large voltage difference, and the surrounding cells charge it. Due to the internal resistance of such cells Very low, only a few milliohms to tens of milliohms, the reverse charge current is considerable under the pressure difference of about 3V. Originally, the voltage of this battery drops, the short-circuit current should also decrease, and the heat generated by the short circuit should also decrease. However, the fever continues or increases because of the huge anti-charge flow. This is not only the heat of this battery, but also the surrounding battery is also hot due to the output reverse charging current. In this way, repeated cycles push, the heat is more serious, and even the heat is out of control, causing fire. So how to prevent the occurrence of high reverse charging current and protect the surrounding cells becomes an important issue to improve battery safety.
发明内容Summary of the invention
本发明目的是：为了克服上述问题，提供一种具有安全保护功能的并联网以及使用该并联网的大容量电池，以将大容量电池中发生短路故障的电芯迅速隔离，从而有效保护大容量电池中的其他电芯，避免发生电池安全事故。The object of the present invention is to provide a security-protected parallel network and a large-capacity battery using the same to quickly isolate a battery cell with a short-circuit fault in a large-capacity battery, thereby effectively protecting a large capacity. Other batteries in the battery to avoid battery safety accidents.
本发明的技术方案是：一种具有安全保护功能的并联网，包括布置在同一平面上且相互间隔分布的若干个电芯连接垫、以及连接在所述电芯连接垫之间的若干个连接片，每一个连接片上均设置有能够被高温熔断的熔断保护结构。The technical solution of the present invention is: a networking with security protection function, comprising a plurality of cell connection pads arranged on the same plane and spaced apart from each other, and a plurality of connections connected between the cell connection pads Each of the connecting pieces is provided with a fuse protection structure capable of being blown by a high temperature.
本发明这种并联网在上述技术方案的基础上，还包括以下优选方案：The parallel connection of the present invention, based on the above technical solutions, further includes the following preferred solutions:
所述连接片为保险丝，所述保险丝形成所述熔断保护结构。The connecting piece is a fuse, and the fuse forms the fuse protection structure.
通过对所述连接片的宽度进行削减处理，而形成所述熔断保护结构。The fuse protection structure is formed by reducing the width of the connecting piece.
在所述连接片的中部开设圆孔，从而形成所述熔断保护结构。A circular hole is formed in a middle portion of the connecting piece to form the fuse protection structure.
在所述连接片宽度方向的一侧开设一弧形豁口，从而形成所述熔断保护结构。An arcuate opening is formed in one side of the width direction of the connecting piece to form the fuse protection structure.
所述弧形豁口为半圆形结构。The curved opening is a semicircular structure.
在所述连接片宽度方向的两侧分别开设一弧形缺口，从而形成所述熔断保护结构。An arcuate notch is formed on each side of the width direction of the connecting piece to form the fuse protection structure.
所述弧形缺口为半圆形结构，且这两个弧形缺口在所述连接片长度方向错开布置。The curved notch is a semi-circular structure, and the two arc-shaped notches are staggered in the longitudinal direction of the connecting piece.
本发明所公布的这种大容量电池，包括电池夹具、制于所述电池夹具上的电芯安装孔、置于所述电芯安装孔中的弹片、插设在所述电芯安装孔中的电芯，还包括上述所述的并联网，所述电池夹具上、于任意相邻两电芯安装孔之间均开设有一条连接片布置槽，所述并联网的电芯连接垫布置在所述电芯安装孔中并与所述电芯相连，所述并联网的连接片布置在所述连 接片布置槽中。The large-capacity battery disclosed in the present invention comprises a battery fixture, a battery mounting hole formed in the battery fixture, a spring piece disposed in the battery core mounting hole, and is inserted in the battery core mounting hole. The battery cell further includes the above-mentioned parallel networking, wherein a connecting piece arrangement slot is defined between the adjacent two battery core mounting holes on the battery fixture, and the parallel connected battery core connection pad is arranged The battery core is mounted in the hole and connected to the battery core, and the interconnection piece is arranged in the connection The tabs are arranged in the slots.
本发明的优点是：本发明在并联网的每一个连接片上均设置有能够被高温熔断的熔断保护结构。当处于同一并联组中的某一只电芯发生短路时，在电压差的推动下，巨大的反充电流向此电芯涌来，流向该电芯的大电流使该电芯附近的某个连接片温度急剧升高，从而迅速烧断该连接片上的熔断保护结构，断路，从此阻断此路电流。这路的断开更加大了周围其他路的负担，电流进一步加大，促成周围另外连接片上的熔断保护结构熔断断开。如此反复动作，终于将短路电池周围的熔断保护结构全部断开，将短路电芯孤立起来，从而达到保护周围电芯的效果，避免电池安全事故发生。An advantage of the present invention is that the present invention is provided with a fuse protection structure capable of being blown by a high temperature on each of the connection sheets of the interconnection. When a certain battery cell in the same parallel group is short-circuited, a large anti-charge current flows to the cell under the push of the voltage difference, and a large current flowing to the cell causes a connection near the cell. The temperature of the sheet rises sharply, thereby rapidly breaking the fuse protection structure on the connecting piece, breaking the circuit, and blocking the current from this. The disconnection of this road is greater than the burden of other roads around, and the current is further increased, which causes the fuse protection structure on the other connecting piece to be blown and disconnected. Repeatedly, the fuse protection structure around the short-circuited battery is finally disconnected, and the short-circuiting cell is isolated, thereby achieving the effect of protecting the surrounding cells and avoiding battery safety accidents.
附图说明DRAWINGS
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。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. The drawings in the following description are only some embodiments of the present invention, which are common in the art. For the skilled person, other drawings can be obtained from these drawings without any creative work.
图1为本发明实施例一中大容量电池的分解图；1 is an exploded view of a large-capacity battery in the first embodiment of the present invention;
图2为本发明实施例一中大容量电池的装配图；2 is an assembled view of a large-capacity battery in the first embodiment of the present invention;
图3为本发明实施例一中并联网的装配图；3 is an assembled view of a networked connection in the first embodiment of the present invention;
图4为图3的A部放大图；Figure 4 is an enlarged view of a portion A of Figure 3;
图5为本发明实施例二中并联网的局部结构示意图；5 is a schematic partial structural diagram of a networked connection according to Embodiment 2 of the present invention;
图6为本发明实施例三中并联网的局部结构示意图；6 is a schematic partial structural diagram of a networked connection according to Embodiment 3 of the present invention;
图7为本发明实施例四中并联网的局部结构示意图；7 is a schematic partial structural diagram of a networked connection in Embodiment 4 of the present invention;
其中：1-电池夹具，2-弹片，3-并联网，4-电芯，5-圆孔，6-弧形豁口，7-弧形缺口，9-保险丝，10-电芯安装孔，10a-连接片布置槽。Among them: 1-battery clamp, 2-spring, 3-and network, 4-cell, 5-round, 6-arc gap, 7-arc gap, 9-fuse, 10-cell mounting hole, 10a - Connection piece arrangement groove.
具体实施方式 detailed description
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。The above scheme will be further described below in conjunction with specific embodiments. It is to be understood that the examples are intended to illustrate the invention and not to limit the scope of the invention. The implementation conditions employed in the examples can be further adjusted according to the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in the conventional experiment.
实施例一：Embodiment 1:
图1和图2示出了本发明这种大容量电池的一个具体实施例，与传统大容量电池相同的是，它也包括电池夹具1、制于所述电池夹具上的众多电芯安装孔10、分别置于所述各电芯安装孔中的众多弹片2、分别插设在所述电芯安装孔中的众多电芯4、以及并联网3。其中，并联网3包括布置在同一平面上且相互间隔分布的众多电芯连接垫、以及连接在各电芯连接垫之间的众多连接片，所述的各个电芯连接垫对应布置在各个电芯安装孔中并与相应的电芯相连，从而将图1中这些处于同一层上的各个电芯并联起来，所述电芯为圆柱形的锂离子电芯。1 and 2 show a specific embodiment of the large-capacity battery of the present invention. Like the conventional large-capacity battery, it also includes a battery holder 1, and a plurality of cell mounting holes formed in the battery holder. 10. A plurality of elastic pieces 2 respectively disposed in the respective cell mounting holes, and a plurality of battery cells 4 respectively inserted in the cell mounting holes, and a parallel network 3. Wherein, the network 3 includes a plurality of cell connection pads arranged on the same plane and spaced apart from each other, and a plurality of connecting pieces connected between the cell connection pads, wherein the respective cell connection pads are correspondingly arranged in the respective cells. The core is mounted in the hole and connected to the corresponding cell, so that the individual cells on the same layer in Fig. 1 are connected in parallel, and the cell is a cylindrical lithium ion cell.
本实施例的关键改进在于：每一个连接片3b上均设置有能够被高温熔断的熔断保护结构。A key improvement of this embodiment is that each of the connecting pieces 3b is provided with a fuse protection structure capable of being blown by a high temperature.
当处于同一并联组中的某一只电芯发生短路时，在电压差的推动下，巨大的反充电流向此电芯涌来，流向该电芯的大电流使该电芯附近的某个连接片3b温度急剧升高，从而迅速烧断该连接片3b上的熔断保护结构，断路，从此阻断此路电流。这路的断开更加大了周围其他路的负担，电流进一步加大，促成周围另外连接片3b上的熔断保护结构熔断断开。如此反复动作，终于将短路电池周围的熔断保护结构全部断开，将短路电芯孤立起来，从而达到保护周围电芯的效果，避免电池安全事故。When a certain battery cell in the same parallel group is short-circuited, a large anti-charge current flows to the cell under the push of the voltage difference, and a large current flowing to the cell causes a connection near the cell. The temperature of the sheet 3b rises sharply, thereby rapidly breaking the fuse protection structure on the connecting piece 3b, breaking the circuit, and blocking the current from this. The disconnection of this way is greater than the burden of other roads around, and the current is further increased, causing the fuse protection structure on the other connecting piece 3b to be blown and disconnected. Repeatedly, the fuse protection structure around the short-circuited battery is finally disconnected, and the short-circuiting cell is isolated, thereby achieving the effect of protecting the surrounding cells and avoiding battery safety accidents.
为了方便所述并联网3的布置，本例在所述电池夹具1上、于任意相邻两电芯安装孔10之间均开设有一条连接片布置槽10a，所述并联网上的各个连接片3b分别布置在这些连接片布置槽10a中。In order to facilitate the arrangement of the interconnection 3, in the present example, a connection piece arrangement groove 10a is formed between the adjacent two cell mounting holes 10 on the battery holder 1, and each connection piece on the parallel network 3b are respectively arranged in these tab arrangement grooves 10a.
本例中，是通过对所述连接片3b的宽度进行削减处理，从而形成所述熔断保护结构的。In this example, the fuse protection structure is formed by reducing the width of the connecting piece 3b.
参照图3和图4所示，具体来说，本例在所述连接片3b的中部开设圆孔5，从而导致所述连接片3b在该圆孔5处的宽度大大削减而且电阻增大，当大电流流过该圆孔5处的连接 片3b时，由于该处连接片3b的电阻较大，从而使得该圆孔5处连接片3b的温度大大升高，进而将圆孔5处连接片3b迅速烧毁熔断。Referring to FIG. 3 and FIG. 4, in particular, in this example, a circular hole 5 is formed in the middle of the connecting piece 3b, so that the width of the connecting piece 3b at the circular hole 5 is greatly reduced and the electric resistance is increased. When a large current flows through the connection at the circular hole 5 In the case of the sheet 3b, since the electric resistance of the connecting piece 3b is large, the temperature of the connecting piece 3b at the circular hole 5 is greatly increased, and the connecting piece 3b at the round hole 5 is quickly burned and melted.
实施例二：Embodiment 2:
参照图5所示，本实施例这种大容量电池的结构和工作原理与实施例一相似，唯一区别在于本例中熔断保护结构的具体结构形式与实施例一不同。本例中，是在所述连接片3b宽度方向的一侧开设一弧形豁口6，从而形成所述熔断保护结构的。Referring to FIG. 5, the structure and working principle of the large-capacity battery of this embodiment are similar to those of the first embodiment. The only difference is that the specific structural form of the fuse protection structure in this embodiment is different from that of the first embodiment. In this example, an arcuate slit 6 is formed on one side in the width direction of the connecting piece 3b, thereby forming the fuse protection structure.
该弧形豁口6为半圆形结构。The curved opening 6 has a semicircular structure.
实施例三：Embodiment 3:
参照图6所示，本实施例这种大容量电池的结构和工作原理与实施例一相似，唯一区别也在于本例中熔断保护结构的具体结构形式与实施例一不同。本例中，是在所述连接片3b宽度方向的两侧分别开设一弧形缺口7(共两个)，从而形成所述熔断保护结构的。Referring to FIG. 6, the structure and working principle of the large-capacity battery of this embodiment are similar to those of the first embodiment. The only difference is that the specific structural form of the fuse protection structure in this embodiment is different from that of the first embodiment. In this example, an arcuate notch 7 (two in total) is formed on both sides in the width direction of the connecting piece 3b, thereby forming the fuse protection structure.
本例中，所述的两个弧形弧形缺口7也为半圆形结构，其尺寸小于实施例二中弧形豁口6的尺寸。In this example, the two curved arc-shaped notches 7 are also semi-circular structures, and the size thereof is smaller than the size of the arc-shaped slits 6 in the second embodiment.
实施例四：Embodiment 4:
参照图7所示，本实施例这种大容量电池的结构和工作原理与实施例一相似，唯一区别也在于本例中熔断保护结构的具体结构形式与实施例一不同。本例中，所述连接片3b整体为保险丝9，即采用普通的保险丝来制作所述连接片3b，由该保险丝9自身形成所述熔断保护结构。Referring to FIG. 7, the structure and working principle of the large-capacity battery of this embodiment are similar to those of the first embodiment. The only difference is that the specific structural form of the fuse protection structure in this embodiment is different from that of the first embodiment. In this example, the connecting piece 3b is entirely a fuse 9, that is, the connecting piece 3b is formed by a common fuse, and the fuse 9 itself forms the fuse protecting structure.
由上不难看出，实施例一、二和三均是通过对连接片3b的宽度进行削减处理，而导致宽度削减处的电阻增大(电流通过时，连接片3b在该处的发热量大于其他部位的发热量，而且该处的尺寸也更小，更容易被熔断)，从而形成所述熔断保护结构的。It is obvious from the above that in the first, second and third embodiments, the width of the connecting piece 3b is reduced, and the resistance at the width reduction is increased (the current generated by the connecting piece 3b is greater when the current passes). The heat generation in other parts, and the size of the place is also smaller, and is more easily blown, thereby forming the fuse protection structure.
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。 The above embodiments are merely illustrative of the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and not to limit the scope of the present invention. Equivalent transformations or modifications made in accordance with the spirit of the main technical solutions of the present invention are intended to be included within the scope of the present invention.

Claims (9)

  1. 一种具有安全保护功能的并联网(3)，包括布置在同一平面上且相互间隔分布的若干个电芯连接垫(3a)、以及连接在所述电芯连接垫(3a)之间的若干个连接片(3b)，其特征在于：每一个连接片(3b)上均设置有能够被高温熔断的熔断保护结构。A network (3) with security protection function includes a plurality of cell connection pads (3a) arranged on the same plane and spaced apart from each other, and a plurality of cells connected between the cell connection pads (3a) The connecting pieces (3b) are characterized in that each of the connecting pieces (3b) is provided with a fuse protection structure capable of being blown by a high temperature.
  2. 根据权利要求1所述的具有安全保护功能的并联网，其特征在于：所述连接片(3b)为保险丝(9)，所述保险丝(9)形成所述熔断保护结构。The parallel connection with security protection function according to claim 1, characterized in that the connecting piece (3b) is a fuse (9), and the fuse (9) forms the fuse protection structure.
  3. 根据权利要求1所述的具有安全保护功能的并联网，其特征在于：通过对所述连接片(3b)的宽度进行削减处理，而形成所述熔断保护结构。The parallel connection with security protection function according to claim 1, characterized in that the fuse protection structure is formed by reducing the width of the connecting piece (3b).
  4. 根据权利要求3所述的具有安全保护功能的并联网，其特征在于：在所述连接片(3b)的中部开设圆孔(5)，从而形成所述熔断保护结构。The parallel connection with security protection function according to claim 3, characterized in that a circular hole (5) is formed in the middle of the connecting piece (3b) to form the fuse protection structure.
  5. 根据权利要求1所述的具有安全保护功能的并联网，其特征在于：在所述连接片(3b)宽度方向的一侧开设一弧形豁口(6)，从而形成所述熔断保护结构。The parallel connection with security protection function according to claim 1, characterized in that an arcuate opening (6) is formed on one side in the width direction of the connecting piece (3b) to form the fuse protection structure.
  6. 根据权利要求1所述的具有安全保护功能的并联网，其特征在于：所述弧形豁口(6)为半圆形结构。The parallel connection with security protection function according to claim 1, characterized in that the arcuate opening (6) is a semicircular structure.
  7. 根据权利要求1所述的具有安全保护功能的并联网，其特征在于：在所述连接片(3b)宽度方向的两侧分别开设一弧形缺口(7)，从而形成所述熔断保护结构。The parallel connection with security protection function according to claim 1, characterized in that an arcuate notch (7) is respectively formed on both sides in the width direction of the connecting piece (3b), thereby forming the fuse protection structure.
  8. 根据权利要求1所述的具有安全保护功能的并联网，其特征在于：所述弧形缺口(7)为半圆形结构，且这两个弧形缺口(7)在所述连接片(3b)长度方向错开布置。The security network with protection function according to claim 1, characterized in that the arcuate notch (7) is a semicircular structure, and the two arcuate notches (7) are in the connecting piece (3b) The length direction is staggered.
  9. 一种大容量电池，包括电池夹具(1)、制于所述电池夹具上的电芯安装孔(10)、置于所述电芯安装孔中的弹片(2)、插设在所述电芯安装孔中的电芯(4)，其特征在于：还包括如权利要求1～8中任一所述的并联网，所述电池夹具(1)上、于任意相邻两电芯安装孔(10)之间均开设有一条连接片布置槽(10a)，所述并联网的电芯连接垫(3a)布置在所述电芯安装孔(10)中并与所述电芯(4)相连，所述并联网的连接片(3b)布置在所述连接片布置槽(10a)中。 A large-capacity battery comprising a battery holder (1), a cell mounting hole (10) formed on the battery holder, a spring piece (2) disposed in the cell mounting hole, and the electric device a battery core (4) in the core mounting hole, characterized by further comprising a parallel connection according to any one of claims 1 to 8, wherein the battery fixture (1) is mounted on any adjacent two cores (10) is provided with a connecting piece arrangement groove (10a), and the connected cell connection pad (3a) is arranged in the cell mounting hole (10) and with the battery core (4) Connected, the parallel connected tabs (3b) are arranged in the tab arrangement slots (10a).
PCT/CN2017/075635 2016-01-29 2017-03-03 Parallelly connected grid having safety protection feature and high capacity battery using said parallelly connected grid WO2017129146A1 (en)

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