WO2022257297A1 - 一种增容式双极性蓄电池堆 - Google Patents

一种增容式双极性蓄电池堆 Download PDF

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Publication number
WO2022257297A1
WO2022257297A1 PCT/CN2021/119240 CN2021119240W WO2022257297A1 WO 2022257297 A1 WO2022257297 A1 WO 2022257297A1 CN 2021119240 W CN2021119240 W CN 2021119240W WO 2022257297 A1 WO2022257297 A1 WO 2022257297A1
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positive
negative
plate chain
bipolar
plates
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PCT/CN2021/119240
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English (en)
French (fr)
Inventor
刘焯
张天任
曹龙泉
王超
汤序锋
邱华良
刘红杰
陈彩凤
黄潇
陈跃武
于治平
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天能电池集团股份有限公司
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Publication of WO2022257297A1 publication Critical patent/WO2022257297A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/045—Cells or batteries with folded plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/029—Bipolar electrodes
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to the field of storage batteries, in particular to a capacity-enhancing bipolar storage battery stack.
  • a bipolar battery is a battery composed of bipolar plates, positive and negative unipolar plates, separators and electrolyte. Compared with other types of batteries, bipolar batteries have many advantages such as high discharge rate, low resistance, ultra-high voltage group, high energy density, and fast charging.
  • bipolar batteries such as the bipolar lead-acid battery disclosed by the Chinese patent with the publication number CN107706426B
  • the bipolar side grids include A number of pole plates arranged side by side, the two sides of the pole plates are respectively coated with positive electrode paste and negative electrode paste and cured, and there is a diaphragm between each two adjacent plates, and the two sides of the diaphragm are respectively connected with the positive electrode paste and the negative electrode.
  • the two poles of the bipolar side grid are respectively welded with several terminals, the terminals of each pole are connected by lead wires, the frame of the bipolar side grid is injection molded to form a plastic frame, and the lead wires are led out to Outside the plastic frame on the upper part of the bipolar side grid, the positive side plate and the negative side plate are respectively formed by injection molding of the two pole faces of the bipolar side grid welded with terminals, and the sides without terminals are respectively Coated with positive electrode paste and negative electrode paste, electrolyte solution is placed in the bipolar side grid.
  • bipolar storage battery disclosed by the Chinese patent whose publication number is CN111740141A, comprising negative unipolar plates, several bipolar plates, and positive unipolar plates facing each other with a positive material layer and a negative material layer.
  • the method is stacked together from top to bottom, and a diaphragm is set between two adjacent bipolar plates and between the bipolar plate and the positive unipolar plate, and the negative unipolar plate.
  • the metal separators of polar plate, positive unipolar plate and negative unipolar plate are hermetically wrapped in the first sealing layer respectively, and the bipolar plate, positive unipolar plate and negative unipolar The surrounding edges of the plate are respectively sealed and wrapped in the second sealing layer.
  • the positive unipolar plate, positive end plate, and positive plate are welded together in sequence, and the negative unipolar plate, negative end plate, and negative plate are welded together in sequence. , the positive panel and the negative panel are fastened together.
  • the invention provides a capacity-enlarging bipolar battery stack, which realizes the unity of high capacity and small volume of the bipolar battery.
  • a capacity-enhancing bipolar battery stack including multiple sets of bipolar plates stacked in sequence, each set of bipolar plates includes an insulating substrate in the middle and positive plate chains and negative electrodes on both sides of the insulating substrate Plate chain, the positive plate chain and the negative plate chain on the same group of bipolar plates are conductively connected through the flow guide passing through the insulating substrate;
  • the positive plate chain includes several single positive plates and connects adjacent single positive plates , a bendable positive connection belt
  • the negative plate chain includes a number of single negative plates and connecting adjacent single negative plates, a bendable negative connection belt, and the adjacent two groups of bipolar plates are in contact with each other on one side
  • Each single positive plate and single negative plate are stacked alternately between the positive plate chain and the negative plate chain, and there is a separator between the adjacent single positive plates and single negative plates;
  • the insulating substrate protrudes from the positive plate chain and the negative plate chain in the vertical bipolar plate arrangement direction, and there is a gap between the insulating substrates of two adjacent groups of bipolar plates, which is used to seal the positive electrode.
  • the sealing ring of the plate chain and the negative plate chain is provided with a liquid injection hole for filling the inner cavity of the sealing ring with electrolyte;
  • a polarity cover is respectively provided on the outer sides of the two sets of bipolar plates located at the head and tail, and a positive terminal and a negative terminal passing through the polarity cover are respectively provided on the positive plate chain and the negative plate chain located at the beginning and the end;
  • the capacity-expanding bipolar battery stack also includes a fixing mechanism for clamping and fixing each set of bipolar plates between two polar covers on both sides.
  • the positive plate chain can be bent into a W shape by using the bendable positive connection belt
  • the negative plate chain can be bent into a W shape by using the bendable negative connection belt
  • the positive plate chain can be bent into a W shape. It overlaps with the negative plate chain, which greatly extends the reaction area; in order to ensure that the alternately stacked single positive plates and single negative plates can be completely aligned to ensure full utilization of the positive and negative active materials in the reaction area, the single positive plate
  • the plate and the single negative plate can be designed as square, circular, regular polygon and other shapes.
  • the insulating substrate, the sealing ring and the polar cover protruding from the positive plate chain and the negative plate chain cooperate with each other to form a sealed structure of the battery. mechanism.
  • the single positive plate includes a single positive grid and a positive active material coated on the single positive grid
  • the single negative plate includes a single negative grid and a negative electrode coated on the single negative grid active substance
  • the deflector is a metal plate connecting the positive plate chain and the negative plate chain
  • the individual positive grids, positive connection strips, flow guides, single negative grids and negative connection strips in the same group of bipolar plates are integrally formed.
  • the positive active material and the negative active material are respectively coated on the single positive grid and the single negative grid without direct contact with the deflector, so the positive active material and the negative active material will not cause corrosion and damage to the deflector .
  • the material of the insulating substrate is plastic, and when the insulating substrate is injected, the flow guide and the insulating substrate are integrally injected.
  • the insulating substrate can be made of easily available plastics.
  • the directions of the individual positive plates and the individual negative plates between the positive plate chain and the negative plate chain are perpendicular to each other when alternately stacked.
  • the single positive plate and the single negative plate are in the shape of square, circular, regular polygon, etc., and in the same battery, the single positive plate and the single negative plate have the same shape, so the single positive plate and the single negative plate form When the directions perpendicular to each other are overlapped, the reaction area is the largest.
  • a glue groove for accommodating the end of the sealing ring is provided on the insulating substrate, and sealant is poured into the glue groove when sealing.
  • a tighter connection between the insulating substrate and the end of the sealing ring is achieved through the sealant poured into the glue tank.
  • the seal ring when the seal ring is assembled with the glue tank, there is a gap between the end surface of the seal ring and the bottom surface of the glue tank, and when the sealant is poured into the glue tank, the gap is filled with sealant.
  • the fixing mechanism includes a plurality of fastening screws passing through the two polarity covers and each insulating substrate, and one end of the fastening screws is matched with a fastening nut.
  • each bipolar plate The voltage of each bipolar plate is fixed, so several bipolar plates can be assembled according to the demand; several bipolar plates are connected through fastening screws and fastening nuts; at the same time To prevent bumping, after tightening the fastening nut, install a protective sleeve at the end of the fastening screw.
  • the positive and negative terminals each include a base for welding with the positive and negative plate chains, and a terminal column with one end connected to the base and the other end passing through the polarity cover,
  • the material of the polar cover is plastic, and the positive and negative terminals and the polar cover are injected into one body during injection molding of the polar cover.
  • the outer circumference of the terminal post is provided with an annular groove arranged in the axial direction, and the polar cover forms an annular protrusion embedded in the annular groove during injection molding.
  • the sealing ring has a groove formed by inward depression, the bottom of the groove is provided with an acid injection hole column, the center of the acid injection hole column is provided with the liquid injection hole, and the acid injection hole column is sleeved With safety valve;
  • a valve cover is provided at the mouth of the groove, and the top surface of the valve cover does not protrude from the surface of the sealing ring.
  • an air filter is provided in the liquid injection hole to make the electrolyte and oxygen compound.
  • this scheme utilizes bipolar plates with positive plate chains and negative plate chains, and the positive and negative plate chains carry more positive and negative activities
  • the material greatly extends the reaction area, increases the output current of the battery, reduces the internal resistance of the battery, and realizes the unity of small volume and large capacity of the bipolar battery.
  • each bipolar plate has a voltage value fixed, and the bipolar plates can be connected in series to realize modularization, so the number of bipolar plates in series can be freely selected to meet different needs .
  • Fig. 1 is the exploded view of the capacity-increasing bipolar storage battery stack provided by the present invention
  • Fig. 2 is the three-dimensional schematic view of the capacity-increasing bipolar battery stack provided by the present invention
  • FIG. 3 is a schematic diagram of the assembly of the bipolar plate and the sealing ring of the capacity-enhancing bipolar battery stack provided by the present invention
  • Fig. 4 is a schematic diagram of the series connection of the bipolar plates of the capacity-enhancing bipolar battery stack provided by the present invention.
  • Fig. 5 is the schematic diagram of the bipolar plates of the capacity-increasing bipolar battery stack provided by the present invention.
  • FIG. 6 is a schematic diagram of the assembly of the bipolar plate and the polar cover of the capacity-enhancing bipolar battery stack provided by the present invention
  • FIG. 7 is an exploded view of the polarity cover of the capacity-enhancing bipolar battery stack provided by the present invention.
  • Fig. 8 is a schematic perspective view of the sealing ring of the capacity-expanding bipolar battery stack provided by the present invention.
  • the bipolar plate 100 is composed of an insulating substrate 110, a current guide 140, and a positive plate chain 120 and a negative plate chain 130 respectively arranged on both sides of the insulating substrate 110.
  • the current guide 140 is made of a metal with good electrical conductivity and is insulated from the The substrate 110 is injection-molded into one body, and the flow guide 140 is electrically connected to the positive plate chain 120 and the negative plate chain 130 .
  • the positive plate chain 120 includes a single positive plate and a positive connection belt, and the positive active material is coated on the single positive plate;
  • the negative plate chain 130 includes a single negative plate and a negative connection belt, and the negative active material is coated on the single negative plate. .
  • the positive connection strip is used to connect adjacent monomer positive plates, and the positive connection strip is bendable; the negative connection strip is used to connect adjacent monomer negative plates, and the negative connection strip is bendable.
  • the positive plate chain 120 and the negative plate chain 130 are bent into a W shape; the positive plate chain 120 and the negative plate chain 130 of adjacent bipolar plates 100 are alternately stacked, and the distance between the single positive plate and the single negative plate is An insulating partition 200 is provided between them.
  • the insulating substrate 110 protrudes from the positive plate chain 120 and the negative plate chain 130 in the direction vertical to the arrangement of the bipolar plates 100. After the bipolar plates 100 are connected in series, the adjacent insulating substrate 110 cooperates with the sealing ring 300 to seal the battery. seal.
  • the insulating substrate 110 is provided with a glue groove 111, the end of the sealing ring 300 is snapped into the glue groove 111, and then the glue groove 111 is connected with the sealing ring 300 with glue 600, and the glue groove 111 and the sealing ring 300 are filled with glue 600 at the same time The gap between the ends.
  • Both ends of the battery stack are connected to the organic polarity cover 400 , the polarity cover 400 is connected to the terminal column 420 of the base 410 , and the base 410 is welded to the positive plate chain 120 or the negative plate chain 130 .
  • the terminal column 420 is provided with several annular grooves 421, and the injection molding of the polar cover 400 is integrated with the terminal column 420.
  • the polar cover 400 is formed as an annular protrusion matching the annular groove 421, so the polar cover 400 and the base 410 can be relatively rotated.
  • electrolyte solution needs to be injected into the storage battery stack.
  • the electrolyte is injected into the battery through the liquid injection hole 310 in the groove of the valve cover 340 on the sealing ring 300, and the gas filter strip 330 is provided in the liquid injection hole 310 to make the electrolyte and gaseous oxygen recombine, and at the same time
  • a safety valve 320 is sleeved on the liquid injection hole for controlling the valve pressure in the battery.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
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Abstract

本发明公开了一种增容式双极性蓄电池堆，包括多组双极性极板、极性盖、固定机构，每组双极性极板包括绝缘基板及位于绝缘基板两侧的正极板链和负极板链，同一组双极性极板上的正、负极板链通过穿过绝缘基板的导流件导电连接；正极板链包括若干单体正极板和正连接带，负极板链包括若干单体负极板和负连接带，相邻两组双极性极板之间相互接触一侧的正、负极板链之间各单体正、负极板交替叠放，单体正、负极板之间具有隔板；绝缘基板在垂直双极性极板排列方向上凸出于正、负极板链，相邻两组绝缘基板之间具有设有注液孔的密封环；位于首尾的正、负极板链上分别设有穿过极性盖的正、负极端子；固定机构用于将各组双极性极板夹持固定在两个极性盖之间。

Description

一种增容式双极性蓄电池堆 技术领域
本发明涉及蓄电池领域，特别涉及一种增容式双极性蓄电池堆。
背景技术
双极性电池是由双极性板、正负单极性板、隔板及电解液组成的电池。相较于其他类型的电池，双极性电池具有高倍率放电、低电阻、超高电压组、高能量密度、快充等诸多优点。
现有的双极性电池，如公开号为CN107706426B的中国专利公开的双极性铅酸蓄电池，包括正边极板、负边极板和双极性边板栅，双极性边板栅包括若干个并排排列的极板，极板的两面分别涂有正极铅膏和负极铅膏并固化，每相邻的两个极板之间均垫有隔膜，隔膜两侧分别与正极铅膏和负极铅膏接触，双极性边板栅的两极面分别焊接有若干个接线端子，每一极面的接线端子通过引出导线相连，双极性边板栅的边框注塑形成塑料边框，引出导线引出至双极性边板栅上部的塑料边框外，正边极板和负边极板分别由双极性边板栅焊接有接线端子的两个极面注塑形成，其未连有接线端子的一面分别涂有正极铅膏和负极铅膏，双极性边板栅内容置有电解液。
又如公开号为CN111740141A的中国专利公开的双极性蓄电池，包括负极单极性极板、若干个双极性极板、正极单极性极板以正极物质层、负极物质层相正对的方式自上而下依次叠放在一起，相邻两个双极性极板之间及双极性极板与正极单极性极板、负极单极性极板之间分别设置隔膜，双极性极板、正极单极性极板和负极单极性极板的金属隔离物分别被密闭包裹在第一密封层内，双极性极板、正极单极性极板和负极单极性极板的四周边缘分别被密闭包裹在第二密封层内，正极单极性极板、正极端板、正极面板依次焊接在一起，负极单极性极板、负极端板、负极面板依次焊接在一起，正极面板与负极面板相紧固在一起。
上述在专利申请公开的双极性电池的结构无法实行高容量与小体积 的统一。
发明内容
为解决现有技术中存在的问题，本发明提供一种增容式双极性蓄电池堆，实现了双极性电池的高容量与小体积的统一。
一种增容式双极性蓄电池堆，包括多组依次叠放的双极性极板，每一组双极性极板包括位于中间的绝缘基板及位于绝缘基板两侧的正极板链和负极板链，同一组双极性极板上的正极板链和负极板链之间通过穿过绝缘基板的导流件导电连接；正极板链包括若干单体正极板和连接相邻单体正极板、可弯折的正连接带，负极板链包括若干单体负极板和连接相邻单体负极板、可弯折的负连接带，相邻两组双极性极板之间相互接触一侧的正极板链和负极板链之间各单体正极板和单体负极板交替叠放，且相邻单体正极板和单体负极板之间具有隔板；
所述绝缘基板在垂直双极性极板排列方向上凸出于正极板链和负极板链，相邻两组双极性极板的绝缘基板之间具有与两绝缘基板配合、用于密封正极板链和负极板链的密封环，密封环上设有向密封环内腔加注电解液的注液孔；
位于首尾的两组双极性极板的外侧分别设有一个极性盖，位于首尾的正极板链和负极板链上分别设有穿过极性盖的正极端子和负极端子；
所述增容式双极性蓄电池堆还包括用于将各组双极性极板夹持固定在两侧的两个极性盖之间的固定机构。
具体的，利用可弯折的正连接带可将正极板链弯折成W型，利用可弯折的负连接带可将负极板链弯折成W型，弯折成W型的正极板链和负极板链相互交叠，极大地延展了反应面积；为保证交替叠放的单体正极板和单体负极板之间能完全对齐以保证反应区域正负活性物质充分的利用，单体正极板与单体负极板可设计为正方形、圆形、正多边形等形状。
凸出于正极板链和负极板链的绝缘基板、密封环以及极性盖互相配合形成电池的密封结构，同时，为使相邻的双极性极板之间连接的更加紧密，设有固定机构。
优选的，单体正极板包括单体正极板栅和涂覆在单体正极板栅上的正极活性物质，单体负极板包括单体负极板栅和涂覆在单体负极板栅上的负 极活性物质，
所述导流件为连接正极板链和负极板链的金属板，
同一组双极性极板中的各单体正极板栅、正连接带、导流件、单体负极板栅和负连接带之间一体成型。
正极活性物质和负极活性物质分别涂覆在单体正极板栅和单体负极板栅上，不与导流板直接接触，因此正极活性物质与负极活性物质不会对导流板造成腐蚀和损坏。
优选的，所述绝缘基板的材料为塑料，绝缘基板注塑时将导流件与绝缘基板注塑为一体。
由于正极板链与负极板链通过导流板连接，且真、负极活性物质分别涂覆与正、负极板栅上，因此绝缘基板选用易获得的塑料即可。
优选的，正极板链和负极板链之间各单体正极板和单体负极板交替叠放时的方向相互垂直。
单体正极板与单体负极板为正方形、圆形、正多边形等形状，且在同一个蓄电池内，单体正极板与单体负极板形状相同，因此单体正极板与单体负极板成相互垂直的方向交叠放置时，反应区域最大。
优选的，所述绝缘基板上设有容纳密封环端部的胶槽，密封时在胶槽内灌注密封胶。
通过胶槽内灌注的密封胶实现了绝缘基板与密封环端部更加紧密的连接。
优选的，密封环与胶槽之间装配时，密封环的端面与胶槽底面之间留有间隙，胶槽中灌注密封胶时，所述间隙中填充满密封胶。
此种结构下，密封环的端面与胶槽安装更方便，且由于采用的胶水进行密封，因此不会对蓄电池的密封性造成影响。
优选的，所述固定机构包括多根穿过两个极性盖及各绝缘基板的紧固螺杆，紧固螺杆的一端配合设有紧固螺母。
每以一个双极性极板的电压大小是固定的，因此可根据需求只有的组装若干个双极性极板；若干个双极性极板通过紧固螺杆和紧固螺母配合连接；同时为防止磕碰在拧紧紧固螺母后，在紧固螺杆尾部安装保护套。
优选的，正、负极端子均包括一个用于与正、负极板链焊接的基座，以及一端与基座连接、另一端穿过极性盖的端子柱，
所述极性盖的材料为塑料，极性盖注塑时将正、负极端子与极性盖注塑为一体。
优选的，所述端子柱的外周设有沿轴向设置的环形槽，极性盖注塑时形成嵌入环形槽内的环形凸起。
此种结构下，端子柱与极性盖之间的拆装更加方便。
优选的，所述密封环上具有向内侧凹陷形成的凹槽，凹槽底部设有注酸孔柱，注酸孔柱的中心设有所述注液孔，所述注酸孔柱上套设有安全阀；
所述凹槽的口部设有阀盖，阀盖的顶面不凸出于所述密封环的表面。
由于电解液通过注液孔流入电池槽中，因此注液孔内设有滤气条，使电解液与氧气进行复合。
与现有技术相比，本发明的有益之处在于：
(1)与现有的同体积的双极性蓄电池相比，本方案利用设有正极板链和负极板链的双极性极板，正、负极板链承载了更多的正、负活性物质，极大的延展了反应面积，增大了蓄电池的输出电流，降低了蓄电池的内阻，实现了双极性蓄电池小体积和大容量的统一。
(2)将正、负活性物质分别涂覆与正、负极板栅上，正、负极活性物质不会对极板造成腐蚀，降低了对基板材料的要求，降低了成本。
(3)每一个双极性极板的电压值固定，且双极性极板之间可相互串联，实现了模块化，因此可自由选择串联的双极性极板的数量以满足不同的需求。
附图说明
图1为本发明提供的增容式双极性蓄电池堆的爆炸图；
图2为本发明提供的增容式双极性蓄电池堆的立体示意图；
图3为本发明提供的增容式双极性蓄电池堆的双极性极板与密封环的装配示意图；
图4为本发明提供的增容式双极性蓄电池堆的双极性极板串联示意图；
图5为本发明提供的增容式双极性蓄电池堆的双极性极板示意图；
图6为本发明提供的增容式双极性蓄电池堆的双极性极板与极性盖的装配示意图；
图7为本发明提供的增容式双极性蓄电池堆的极性盖的爆炸图；
图8本发明提供的增容式双极性蓄电池堆的密封环的立体示意图。
具体实施方式
下面结合附图和具体实施例对本发明提供的方案作进一步说明。
如图1-8所示，十二个双极性极板100串联成一个双极性电池堆。双极性极板100由绝缘基板110、导流件140和分设于绝缘基板110两侧的正极板链120、负极板链130组成，导流件140由导电性良好的金属制成且与绝缘基板110注塑为一体，导流件140电性连接正极板链120和负极板链130。
正极板链120包括单体正极板和正连接带，单体正极板上涂覆有正极活性物质；负极板链130包括单体负极板和负连接带，单体负极板上涂覆有负极活性物质。
正连接带连接相邻的单体正极板，且正连接带可弯折；负连接带用于连接相邻的单体负极板，且负连接带可弯折。
将正极板链120、负极板链130弯折成W型；将相邻的双极性极板100的正极板链120和负极板链130交替叠放，单体正极板与单体负极板之间设有绝缘的隔板200。
绝缘基板110在垂直双极性极板100排列方向上凸出于正极板链120、负极板链130，将双极性极板100串联后，相邻的绝缘基板110与密封环300配合将电池密封。
绝缘基板110上设有胶槽111，将密封环300的端部卡入胶槽111，再利用胶水600将胶槽111与密封环300连接，同时利用胶水600填满胶槽111与密封环300端部之间的缝隙。
串联的十二个双极性极板100利用固定机构连接，四根紧固螺杆510通过极性盖400及绝缘基板110四角上的通孔连接，紧固螺杆510的一端与紧固螺母520配合固定，同时为防止磕碰在拧紧紧固螺母520后，在紧固螺杆510尾部安装保护套530。
蓄电池堆两端均连接有机极性盖400，极性盖400与基座410的端子柱420连接，基座410与正极板链120或负极板链130焊接。
端子柱420上设有若干个环形槽421，极性盖400注塑是与端子柱420 注塑为一体，极性盖400形成于环形槽421相适配的环形突起，因此极性盖400与基座410之间可相对转动。
将十二个双极性极板100串联完成后，需往蓄电池堆里注入电解液。
电解液通过密封环300上设有阀盖340的凹槽里的的注液孔310注入到蓄电池中，注液孔310中设有滤气条330用于使电解液与气体氧进行复合，同时注液孔柱上套接有安全阀320用于控制蓄电池内的阀压。

Claims (10)

  1. 一种增容式双极性蓄电池堆，其特征在于，包括多组依次叠放的双极性极板，每一组双极性极板包括位于中间的绝缘基板及位于绝缘基板两侧的正极板链和负极板链，同一组双极性极板上的正极板链和负极板链之间通过穿过绝缘基板的导流件导电连接；正极板链包括若干单体正极板和连接相邻单体正极板、可弯折的正连接带，负极板链包括若干单体负极板和连接相邻单体负极板、可弯折的负连接带，相邻两组双极性极板之间相互接触一侧的正极板链和负极板链之间各单体正极板和单体负极板交替叠放，且相邻单体正极板和单体负极板之间具有隔板；
    所述绝缘基板在垂直双极性极板排列方向上凸出于正极板链和负极板链，相邻两组双极性极板的绝缘基板之间具有与两绝缘基板配合、用于密封正极板链和负极板链的密封环，密封环上设有向密封环内腔加注电解液的注液孔；
    位于首尾的两组双极性极板的外侧分别设有一个极性盖，位于首尾的正极板链和负极板链上分别设有穿过极性盖的正极端子和负极端子；
    所述增容式双极性蓄电池堆还包括用于将各组双极性极板夹持固定在两侧的两个极性盖之间的固定机构。
  2. 如权利要求1所述的增容式双极性蓄电池堆，其特征在于，单体正极板包括单体正极板栅和涂覆在单体正极板栅上的正极活性物质，单体负极板包括单体负极板栅和涂覆在单体负极板栅上的负极活性物质，
    所述导流件为连接正极板链和负极板链的金属板，
    同一组双极性极板中的各单体正极板栅、正连接带、导流件、单体负极板栅和负连接带之间一体成型。
  3. 如权利要求2所述的增容式双极性蓄电池堆，其特征在于，所述绝缘基板的材料为塑料，绝缘基板注塑时将导流件与绝缘基板注塑为一体。
  4. 如权利要求1所述的增容式双极性蓄电池堆，其特征在于，正极板链和负极板链之间各单体正极板和单体负极板交替叠放时的方向相互垂直。
  5. 如权利要求1所述的增容式双极性蓄电池堆，其特征在于，所述 绝缘基板上设有容纳密封环端部的胶槽，密封时在胶槽内灌注密封胶。
  6. 如权利要求5所述的增容式双极性蓄电池堆，其特征在于，密封环与胶槽之间装配时，密封环的端面与胶槽底面之间留有间隙，胶槽中灌注密封胶时，所述间隙中填充满密封胶。
  7. 如权利要求1所述的增容式双极性蓄电池堆，其特征在于，所述固定机构包括多根穿过两个极性盖及各绝缘基板的紧固螺杆，紧固螺杆的一端配合设有紧固螺母。
  8. 如权利要求1所述的增容式双极性蓄电池堆，其特征在于，正、负极端子均包括一个用于与正、负极板链焊接的基座，以及一端与基座连接、另一端穿过极性盖的端子柱，
    所述极性盖的材料为塑料，极性盖注塑时将正、负极端子与极性盖注塑为一体。
  9. 如权利要求8所述的增容式双极性蓄电池堆，其特征在于，所述端子柱的外周设有沿轴向设置的环形槽，极性盖注塑时形成嵌入环形槽内的环形凸起。
  10. 如权利要求1所述的增容式双极性蓄电池堆，其特征在于，所述密封环上具有向内侧凹陷形成的凹槽，凹槽底部设有注酸孔柱，注酸孔柱的中心设有所述注液孔，所述注酸孔柱上套设有安全阀；
    所述凹槽的口部设有阀盖，阀盖的顶面不凸出于所述密封环的表面。
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