WO2016197564A1 - 一种用于二次电池负极封口体的密封圈 - Google Patents

一种用于二次电池负极封口体的密封圈 Download PDF

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Publication number
WO2016197564A1
WO2016197564A1 PCT/CN2015/096609 CN2015096609W WO2016197564A1 WO 2016197564 A1 WO2016197564 A1 WO 2016197564A1 CN 2015096609 W CN2015096609 W CN 2015096609W WO 2016197564 A1 WO2016197564 A1 WO 2016197564A1
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Prior art keywords
circuit board
battery
board module
negative electrode
electrode cap
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PCT/CN2015/096609
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English (en)
French (fr)
Inventor
常海涛
陈进添
苏盛
余佑锋
Original Assignee
福建南平南孚电池有限公司
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Priority claimed from CN201520407274.2U external-priority patent/CN204793020U/zh
Priority claimed from CN201510323639.8A external-priority patent/CN104900840B/zh
Application filed by 福建南平南孚电池有限公司 filed Critical 福建南平南孚电池有限公司
Publication of WO2016197564A1 publication Critical patent/WO2016197564A1/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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M10/058—Construction or manufacture
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • 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
    • 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 present invention relates to a secondary battery, and in particular to a sealing ring for a secondary battery negative sealing body.
  • secondary batteries also referred to as rechargeable batteries
  • Lithium ion secondary batteries are gradually being applied in the above fields due to their high energy, high power discharge, and environmental protection.
  • the normal operation of the rechargeable battery often needs to cooperate with other functional integrated circuit chips, and has achieved the desired working effect.
  • the rechargeable battery and the integrated circuit chip are separately packaged, and then connected together by the connection of the circuit board and the wires. In this way, there are many external components, many production processes, and high cost.
  • the rechargeable battery and the integrated circuit chip are bulky and have poor performance, which is disadvantageous for miniaturization or miniaturization.
  • the space occupied by each part of the lithium ion secondary battery is relatively fixed, wherein the inside of the polymer battery core includes a positive electrode pole piece, a separator film and a negative electrode pole piece, and is at the positive electrode pole
  • the sheet is sealed from the end of the separator with a specified height of the core, and the cell top seal occupies a certain height of the polymer cell, thereby reducing the effective space inside the polymer cell.
  • the space utilization rate of the polymer battery has a great relationship with the energy density and capacity of the lithium ion secondary battery.
  • the space utilization ratio of the polymer battery core is larger, and the energy density of the lithium ion secondary battery is The capacity is also large. Therefore, the conventional lithium ion secondary battery generally has a problem that the energy density and capacity of the lithium ion secondary battery are low due to the low space utilization ratio of the polymer battery.
  • the present invention provides a sealing ring for a secondary battery negative electrode sealing body, the sealing body for closing an opening of a battery case of the secondary electrochemical battery, wherein the sealing body comprises: a negative electrode cap, a circuit board module and a sealing ring, the negative electrode cap is located at an outermost side of the battery sealing body, the circuit board module is located inside the negative electrode cap, and is connected to the negative electrode cap through a connecting member; the circuit board module is a plastic flexible circuit The plate has a certain elasticity, and an elastic deformation is generated by the pressing of the sealing ring for being caught inside the battery case; the sealing ring is a flexible and elastic annular insulating layer disposed on the battery case In the gap between the circuit board module and the negative electrode cap, the cross section of the sealing ring is shape, a part of the shape is used for fixing the circuit board module under the extrusion of the battery case, and another part is for isolating the battery case and the negative electrode cap, sealing the negative electrode cap, the battery case and the circuit board module; a
  • connection between the circuit board module and the negative electrode cap is solder.
  • the connecting member between the circuit board module and the negative electrode cap is a snap connection.
  • At least two chucks are provided at the edge of the negative electrode cap for fixing the negative cap on the circuit board module.
  • the circuit board module is provided with at least two card slots on the side of the negative electrode cap corresponding to the edge of the negative electrode cap for mounting the negative electrode cap.
  • the circuit board module is at least one printed circuit board.
  • the circuit negative output end of the circuit board module is disposed at a connection between the negative electrode cap and the circuit board, so that the negative output is collinear with the circuit ground.
  • connection portion of the negative electrode cap and the circuit board module is a "C" type annular structure.
  • the material of the sealing ring is a transparent light guiding material.
  • the battery further includes a battery core and a positive electrode cap, wherein the positive electrode cap is connected to the battery case to form a positive electrode of the secondary battery; the battery core is placed in the battery case, located at the Between the positive cap and the circuit board module.
  • the sealing ring structure design of the negative electrode sealing body for secondary battery of the invention is smart and reasonable, and is not It can only seal the gap between the battery case, the circuit board module and the negative electrode cap, isolate the positive and negative terminals of the battery, and prevent short circuit when the battery is charged.
  • Figure 1a is a schematic view showing the structure of an electrochemical cell comprising a sealing ring and a sealing body of the present invention.
  • Figure 1b is an exploded perspective view of an electrochemical cell incorporating the seal and closure of the present invention.
  • Figure 1c is a cross-sectional view of Figure 1a taken along the line A-A.
  • Fig. 2 is a schematic enlarged cross-sectional view showing a seal body fitting and a seal ring for an electrochemical cell of the present invention.
  • Figure 3a is a cross-sectional view of a seal assembly for an electrochemical cell of the present invention.
  • Figure 3b is a cross-sectional exploded view of the seal assembly of the present invention for use in an electrochemical cell.
  • Figure 3c is a perspective view of a sealing ring for an electrochemical cell of the present invention.
  • Figure 3d is a top plan view of a sealing ring assembly for an electrochemical cell of the present invention.
  • FIG. 4 is a schematic view of the sealing ring and the sealing body fitting of the present invention for cooperating with a charger when charging an electrochemical battery.
  • FIGS. 1a and 1b are respectively a schematic structural view and an exploded perspective view of the electrochemical cell 100 of the present invention.
  • an electrochemical cell 100 includes a battery case 101, a battery cell 102 disposed in the battery case 101, a negative electrode cap 103, and is disposed between the battery cell 102 and the negative electrode cap 103.
  • the negative electrode cap of the present invention has the functions of electromagnetic shielding, electrostatic shielding, and heat dissipation of the circuit.
  • the battery cell 102 is jacketed with a battery case 101 and is located between the positive electrode cap 105 and the circuit board module 104.
  • the battery case 101 is a cylindrical or rectangular steel case for outputting a positive electrode and fixing the circuit board module 104.
  • the positive electrode cap 105 is formed in a right-handed structure with the battery case 101 in a right-handed manner to constitute a positive electrode of the secondary battery 100.
  • the circuit board module 104 is at least one printed circuit board (PCB) having a first side and a second side, wherein the first side is directed relative to the electrochemical cell 100 to the negative cap 103 and the second side is opposite the electrochemical Battery 100 is directed to cell 102.
  • the PCB is a circuit board on which a wiring pattern is printed, and has a size substantially corresponding to the inner diameter of the casing of the battery 100.
  • a plurality of printed conductors and components are disposed on a first side or a second side of the circuit board module 104.
  • the circuit board module 104 is adjacent to the negative electrode cap 103 side of the battery 100 between the battery cell 102 and the negative electrode cap 103.
  • the circuit board module 104 is provided with a connecting member for fixing the negative electrode cap 103 to the circuit board module 104.
  • the negative electrode cap 103 may be soldered to the circuit board module 104 by soldering, or may be fixed by a snap connection or the like.
  • at least two chucks are disposed at the edge of the negative cap 103 for fixing the negative cap 103 to the circuit board module 104, and the circuit board module 104 is opposite to the negative cap 103.
  • At least two card slots are provided on the side corresponding to the edge position of the negative electrode cap 103 for mounting the negative electrode cap 103.
  • the circuit negative output terminal of the circuit board module 104 is disposed at a junction of the negative electrode cap 103 and the circuit board such that the negative output is collinear with the circuit ground.
  • the circuit board module is used for lithium battery charging protection, charging indication, and can also be used for battery discharge protection, short circuit protection, over discharge protection, and control output voltage.
  • Electrode connecting wires 108a and 108b are disposed between the circuit board module 104 and the battery cell 102, respectively, and the positive and negative electrodes of the battery are respectively taken out, wherein 108a is a positive connecting wire and 108b is a negative connecting wire.
  • Figure 1c is a cross-sectional view of Figure 1a taken along the line AA.
  • a seal ring 106 is disposed between the circuit board module 104 and the external battery case 101 between the negative electrode cap 103 and the battery case 101.
  • the sealing ring 106 is a flexible and resilient annular insulating mat layer having a shape along the cross section of the electrochemical cell 101A-A. shape.
  • the seal ring 106 can function to isolate the battery case 101 as the first electrode and the negative electrode cap 103 as the second electrode, and can seal and fix the circuit board module 104 due to the elastic action of the seal ring 106, sealing the battery case The gap between 101 and the negative electrode cap 103. Specifically, as shown in FIG.
  • a portion of the shape is used to press the fixed circuit board module 104 between the twisted wire 107 and the battery case 101, and the other portion is used to isolate the battery case 101 and the negative electrode cap 103.
  • the portion of the sealing ring 106 that is in contact with the inside of the battery case 101 has a circular arc shape for fitting the circular arc structure of the battery case 101.
  • the circuit board module 104 is a plastic flexible circuit board having a certain elasticity, and is elastically deformed by the pressing of the sealing ring 106 for being caught inside the battery case 101.
  • the battery case 101 On the outer surface of the battery case 101, there is a ring-shaped inward annular recess corresponding to the position between the battery cell 102 and the printed circuit board 106, which is a twist line 107.
  • the battery cell 102 is placed in the battery case 101 between the positive electrode cap 105 and the structure of the twist line 107.
  • the arrangement of the seal ring 106 and the twist line 107 allows the circuit board module 104 to be fixed between the annular recess of the battery case 101 and the bottom of the battery case 101, so that the connection of the battery case 101 to the negative electrode cap 103 does not require any soldering.
  • the structure of the twist line 107 is used to position the circuit board module 104.
  • the diameter of the circuit board module 104 is set to be between the inner diameter of the annular recess formed by the twist line 107 and the inner diameter of the battery case 101.
  • the battery cell 102 is first placed in the battery case 101, and then the circuit board module 104 is assembled into the battery case 101.
  • the size of the circuit board module 104 can be caught on the structure of the twisted wire 107 to avoid The contact of the battery cell 102, and then the battery case 101 and the negative electrode cap 103 are separated by the sealing ring 106, completing the assembly of the battery 100.
  • the above structure allows the circuit board module 104 to form a closed space inside the battery case 101 for accommodating the battery cells 102 by means of the structure of the twisted wire 107, so that the volume of the battery cells 102 can be increased, thereby increasing the capacity of the secondary battery.
  • the battery cell 102 is a hermetic structure, and operates by connecting the positive and negative electrodes from the inside of the battery cell 102 to the positive and negative terminals of the corresponding battery.
  • the depth of the recessed line 107 with respect to the surface of the battery case 101 is 0.2-1.2 mm.
  • Fig. 2 is a schematic enlarged cross-sectional view showing a sealing body fitting 200 for an electrochemical cell of the present invention.
  • the sealing body assembly 200 includes a first PCB 201, a second PCB 202, and a negative electrode cap 203.
  • the first PCB 201 and the second PCB 202 are two printed circuit boards of the same area.
  • the first PCB 201 is adjacent to the battery core 204, and the second PCB 202 is remote from the battery core 204.
  • the first PCB 201 is stuck on the battery case 206 through the twist line 205.
  • the negative electrode cap 203 of the second PCB 202 is electrically connected by contact and constitutes a shielding structure therewith.
  • a plurality of chips or circuit components are disposed on a side of the first PCB 201 adjacent to the battery cell 204 and a side of the second PCB 202 remote from the battery core 204, wherein components that generate radiation during operation are disposed on the second PCB 202 is in the shielding structure composed of the negative electrode cap 203.
  • a seal ring 207 is disposed between the outside of the second PCB 202 and the negative electrode cap 203 and the battery case 206.
  • the sealing ring 207 is a flexible and elastic annular insulating layer disposed in the gap between the battery case 206, the second PCB 202 and the negative electrode cap 203, and the sealing ring 207 has a cross section.
  • a portion of the shape is used to fix the first PCB 201 and the second PCB 202 at the twist line 205 under the pressing of the battery case 206, and the other portion is used to isolate the battery case 206 and the negative electrode cap 203, and seal the negative electrode cap 203 and the battery.
  • the portion of the sealing ring 207 that is in contact with the inside of the battery case 206 is a circular arc shape for engaging with the circular arc structure of the battery case 206; wherein the sealing ring 207 is for isolating the portion of the battery case 206 and the negative electrode cap 203, and extending It is higher than the battery casing 206 by a certain distance and is flush with the negative electrode cap 203.
  • the contact tin plating 210 is reinforced to seal a gap between the circuit board and the battery case.
  • a negative connection line 208b (208a is a positive connection line, not shown) that leads the battery cell 204 through the through hole 209 between the first PCB and the second PCB is connected to the wires on the first PCB and the second PCB.
  • the inner surface of the through hole 209 is plated with a conductive material, for example, copper plating, so that wiring of a plurality of circuit boards can be connected through the through holes 209 and connected to a portion where the negative electrode cap and the circuit board are in contact, thereby conducting the same. To the negative cap.
  • Figure 3a is a cross-sectional view of a closure assembly 300 for an electrochemical cell of the present invention.
  • Figure 3b is a cross-sectional exploded view of a closure assembly 300 for an electrochemical cell of the present invention.
  • the sealing body fitting 300 includes a negative electrode cap 301, a sealing ring 302, and a circuit board module 303.
  • a charging indicator light 305 is disposed on the circuit board module 303 corresponding to the edge of the negative electrode cap 301.
  • the shape of the connection portion between the negative electrode cap 301 and the circuit board module 303 is a "C"-type annular structure, that is, the edge of the negative electrode cap has a notch 304, and the notch 304 is a pass of the charging indicator light 305.
  • the optical port, the notch 304 has a certain height but does not exceed the height of the negative electrode cap (as shown in FIG. 3c) for exposing the charging indicator light 305, and its position corresponds to the charging indicator light 305 on the circuit board module 303. position.
  • the sealing ring 302 is a flexible and elastic annular insulating layer, which can completely cover the light-passing port of the charging indicator 305 (as shown in FIG. 3d).
  • the material of the sealing ring 302 is a transparent light guiding material, and the charging indicator 305 can be enabled. The emitted light passes through the sealing ring and causes the entire sealing ring to transmit light.
  • FIG. 4 is a schematic view of the sealing ring of the present invention used in conjunction with a charger for charging an electrochemical battery. As shown in FIG. 4, when the battery needs to be charged, when it is placed in the rechargeable battery case, a short circuit may occur due to a false contact between the elastic piece or the spring inside the rechargeable battery case and the battery case as the positive electrode.
  • the electrochemical cell 400 to which the sealing ring of the present invention is applied has a sealing ring 404 disposed in a gap between the battery case 401, the circuit board module 402 and the negative electrode cap 403, and the cross section of the sealing ring 404 is shape, A portion of the shape is used to fix the circuit board module 402 under the pressing of the battery case 401, and another portion is used to isolate the battery case 401 and the negative electrode cap 403, and seal the negative electrode cap 403, the battery case 401, and the circuit board module 402.
  • the sealing ring 404 is used to isolate the portion of the battery case 401 and the negative electrode cap 403, protrudes and is at a certain distance from the battery case 401, and is flush with the negative electrode cap 403, so that the elastic piece or spring inside the battery case can be charged.
  • the battery case is not touched to prevent the battery from short-circuiting during charging.
  • the sealing ring structure for the secondary battery negative sealing body of the invention is smart and reasonable, and can not only seal the gap between the battery casing, the circuit board module and the negative electrode cap, isolate the positive and negative electrodes of the battery, and can also charge the battery when charging Prevent short circuits.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本发明提供了一种用于二次电池负极封口体的密封圈，封口体包括：负极帽、电路板模块和密封圈；电路板模块为塑料柔性电路板，通过密封圈的挤压产生弹性形变用于卡在电池壳体内部；密封圈为一柔性且弹性环形绝缘垫层，布置于电池壳体、电路板模块与负极帽的空隙中，密封圈的截面呈（I）状，（I）状的一部分用于在电池壳体的挤压下固定电路板模块，另一部分用于隔离电池壳体和负极帽，密封负极帽、电池壳体及电路板模块；密封圈与电池壳体内部接触的部位为圆弧形，用于配合电池壳体的圆弧结构；密封圈用于隔离电池壳体和负极帽的部分，伸出并高于电池壳体一定距离，并与负极帽齐平，以防止电池在充电时产生短路。

Description

一种用于二次电池负极封口体的密封圈 技术领域
本发明涉及一种二次电池，具体涉及一种用于二次电池负极封口体的密封圈。
背景技术
近年来，二次电池(也称为充电电池)已经广泛应用于各种便携式电气设备和电子设备中，例如玩具、手持设备等，这对二次电池储能能量提出越来越高的要求。锂离子二次电池由于具有能量高、可以高功率放电、环保等优点，因而正在逐渐应用在以上领域。
充电电池的正常工作经常需要与其他功能的集成电路芯片配合，已达到理想的工作效果。通常充电电池与集成电路芯片分别进行封装，然后再通过电路板和导线的连接，结合在一起使用。这样外围元件多，生产工序多、成本高，充电电池与集成电路芯片体积大，性能较差，不利于小型化或微型化。
在进行锂离子二次电池封装时，锂离子二次电池各部分所占的空间都较为固定，其中，该聚合物电芯内部则包括正极极片、隔离膜和负极极片，且在正极极片背离隔离膜的一端具有指定高度的电芯顶封进行封装，由于电芯顶封占据了该聚合物电芯的一定高度，从而减少了该聚合物电芯内部的有效空间。而聚合物电芯的空间利用率与锂离子二次电池的能量密度和容量有较大关系，一般的，该聚合物电芯的空间利用率越大，该锂离子二次电池的能量密度和容量也越大，因此，现有的锂离子二次电池普遍存在着由于聚合物电芯的空间利用率低而导致的锂离子二次电池的能量密度和容量较低的问题。
发明内容
本发明提供了一种用于二次电池负极封口体的密封圈，所述封口体用于封闭所述二次电化学电池的电池壳体的开口部，其中所述封口体包括：负极帽、电路板模块和密封圈，所述负极帽位于所述电池封口体的最外侧，所述电路板模块位于所述负极帽内侧，与负极帽通过连接件连接；所述电路板模块为塑料柔性电路板，具有一定的弹性，通过所述密封圈的挤压产生弹性形变用于卡在所述电池壳体内部；所述密封圈为一柔性且弹性环形绝缘垫层，布置于所述电池壳体、电路板模块与负极帽的空隙中，所述密封圈的截面呈
Figure PCTCN2015096609-appb-000001
状，
Figure PCTCN2015096609-appb-000002
状的一部分用于在所述电池壳体的挤压下固定电路板模块，另一部分用于隔离所述电池壳体和所述负极帽，密封所述负极帽、电池壳体及电路板模块；所述密封圈与电池壳体内部接触的部位为圆弧形，用于配合电池壳体的圆弧结构；所述密封圈用于隔离所述电池壳体和所述负极帽的部分，伸出并高于所述电池壳体一定距离，并与所述负极帽齐平，以防止所述电池在充电时产生短路。
优选地，所述电路板模块与所述负极帽之间的连接件为焊料。
优选地，所述电路板模块与所述负极帽之间的连接件为卡扣连接。
优选地，所述负极帽的边缘处设置有至少两个卡头，用于将所述负极帽固定在所述电路板模块上。
优选地，所述电路板模块相对于所述负极帽的一侧上对应于所述负极帽的边缘位置设置有至少两个卡槽，用于安装所述负极帽。
优选地，所述电路板模块为至少一块印刷电路板。
优选地，所述电路板模块的电路负极输出端设置在所述负极帽与电路板的连接处，使负极输出与电路接地共线。
优选地，所述负极帽与电路板模块连接部位的形状为“C”型环状结构。
优选地，所述密封圈的材料为透明导光材料。
优选地，所述电池还包括电芯和正极帽，其中，所述正极帽与所述电池壳体连接构成所述二次电池的正极；所述电芯放置于所述电池壳体内，位于所述正极帽与所述电路板模块之间。
本发明的用于二次电池负极封口体的密封圈结构设计巧妙合理，不 仅能够密封电池壳体、电路板模块与负极帽之间的空隙，隔离电池的正负极，还可以在电池充电时防止产生短路。
附图说明
参考随附的附图，本发明更多的目的、功能和优点将通过本发明实施方式的如下描述得以阐明，其中：
图1a示意性示出了包含了本发明的密封圈及封口体的电化学电池的结构示意图。
图1b是包含了本发明的密封圈及封口体的电化学电池的分解透视图。
图1c是图1a沿A-A方向的剖面图。
图2示意性示出了本发明的用于电化学电池的封口体配件和密封圈的局部放大剖视图。
图3a为本发明的密封圈用于电化学电池的封口体配件的剖视图。
图3b为本发明的密封圈用于电化学电池的封口体配件的剖视分解图。
图3c为本发明的密封圈用于电化学电池的封口体配件的立体图。
图3d为本发明的密封圈用于电化学电池的封口体配件的俯视图。
图4为本发明的密封圈和封口体配件用于电化学电池充电时与充电器配合的示意图。
具体实施方式
通过参考示范性实施例，本发明的目的和功能以及用于实现这些目的和功能的方法将得以阐明。然而，本发明并不受限于以下所公开的示范性实施例；可以通过不同形式来对其加以实现。说明书的实质仅仅是帮助相关领域技术人员综合理解本发明的具体细节。
应当理解，前述大体的描述和后续详尽的描述均为示例性说明和解释，并不应当用作对本发明所要求保护内容的限制。
在下文中，将参考附图描述本发明的实施例。在附图中，相同的附图标记代表相同或类似的部件，或者相同或类似的步骤。
本发明提供一种电化学二次电池，图1a、1b分别为本发明的电化学电池100的结构示意图和分解透视图。如图1a、1b所示，一种电化学电池100，包括：电池壳体101、置于电池壳体101内的电芯102、负极帽103、置于电芯102和负极帽103之间的空间的电路板模块104以及正极帽105，其中负极帽位于电池封口体的最外侧，电路板模块104位于负极帽103内侧，与负极帽103通过连接件连接。本发明的负极帽具有电磁屏蔽、静电屏蔽和电路散热的功能。电芯102外套有电池壳体101，并位于正极帽105与电路板模块104之间。电池壳体101为圆柱体或长方体结构的钢壳，用于输出正极，固定电路板模块104。根据本发明的一个实施例，正极帽105右旋地与所述电池壳体101成型为一体结构，构成二次电池100的正极。
电路板模块104为至少一层印刷电路板(PCB)，具有第一侧和第二侧，其中第一侧相对于所述电化学电池100指向负极帽103，第二侧相对于所述电化学电池100指向电芯102。PCB是其上印刷有布线图案的电路板，并具有与所述电池100的壳体内径具有大致对应的尺寸。多个印制导线和元器件布置在电路板模块104的第一侧或第二侧。电路板模块104靠近所述电池100的负极帽103侧，位于电芯102和负极帽103之间。电路板模块104上设置有连接件从而将负极帽103固定在电路板模块104上，例如，负极帽103可以通过焊料焊接在电路板模块104上，也可以通过卡扣连接等方式固定。优选地，采用卡扣方式连接时，负极帽103的边缘处设置有至少两个卡头，用于将负极帽103固定在电路板模块104上，而电路板模块104相对于负极帽103的一侧上对应于所述负极帽103的边缘位置设置有至少两个卡槽，用于安装负极帽103。电路板模块104的电路负极输出端设置在所述负极帽103与电路板的连接处，使负极输出与电路接地共线。电路板模块用于锂电池充电保护、充电指示，还可以用于电池的放电保护、短路保护、过放保护以及控制输出电压。电路板模块104和电芯102之间设置有电极连接线108a和108b，分别将电池的正负极分别引出，其中108a为正极连接线，108b为负极连接线。图1c是图1a沿A-A方向的剖面图。在电路板模块104与外部的电池壳体101之间，负极帽103与电池壳体101之间设置有密封圈106。密封圈106 为一柔性且具有弹性的环形绝缘垫层，其沿所述电化学电池101A-A剖面的形状为
Figure PCTCN2015096609-appb-000003
形。密封圈106能够起到隔离作为第一电极的电池壳体101和作为第二电极的负极帽103的作用，并且由于密封圈106的弹性作用能够挤压并固定电路板模块104，密封电池壳体101和负极帽103之间的空隙。具体地，如图1c所示，
Figure PCTCN2015096609-appb-000004
状的一部分用于挤压固定电路板模块104于所述匝线107和电池壳体101之间，另一部分用于隔离所述电池壳体101和所述负极帽103。优选地，密封圈106与电池壳体101内部接触的部位为圆弧形，用于配合电池壳体101的圆弧结构。优选地，电路板模块104为塑料柔性电路板，具有一定的弹性，通过密封圈106的挤压产生弹性形变用于卡在电池壳体101内部。
电池壳体101的外表面上对应电芯102和印刷电路板106之间的位置有一圈向内的环形凹陷，为匝线107。将所述电芯102放置于所述电池壳体101内，位于正极帽105与所述匝线107的结构之间。密封圈106和匝线107的设置使得电路板模块104固定在电池壳体101的环形凹陷与电池壳体101底部之间，因此电池壳体101与负极帽103的连接不需要任何焊接。
匝线107结构的设置用于定位电路板模块104，具体地，将电路板模块104的直径大小设置为在匝线107所构成的环形凹陷的内径与电池壳体101的内径之间，在装配电池时，先将电芯102放置到电池壳体101中，然后将电路板模块104装配到电池壳体101中，电路板模块104的大小尺寸可以卡在匝线107的结构上从而避免了与电芯102的接触，然后再通过密封圈106将电池壳体101与负极帽103进行隔离，完成了电池100的装配。上述结构使得电路板模块104借助匝线107的结构在电池壳体101内部形成了一个封闭的空间用于容纳电芯102，从而可以增大电芯102的体积，因此增大二次电池的容量。优选地，电芯102为一密闭结构，通过从电芯102内部引出其正负极与相应的电池正负极相连而进行工作。
优选地，上述匝线107相对于电池壳体101表面的凹陷深度为0.2-1.2mm。
图2示意性示出了本发明的用于电化学电池的封口体配件200的局 部放大剖视图。如图2所示，所述封口体配件200包括第一PCB 201、第二PCB 202、负极帽203。根据本发明的一个实施例，第一PCB 201和第二PCB 202为面积相同的两块印刷电路板。所述第一PCB 201靠近电芯204，所述第二PCB 202远离电芯204。第一PCB 201通过匝线205卡在电池壳体206上。第二PCB 202所述负极帽203通过接触实现电连接，并与其组成一个屏蔽结构。第一PCB 201靠近电芯204的一侧和第二PCB 202远离电芯204的一侧布置有多个芯片或电路元器件，其中，在工作过程中会产生辐射的元器件布置在第二PCB 202与负极帽203组成的屏蔽结构中。在第二PCB 202、负极帽203的外部与电池壳体206及之间设置有密封圈207。密封圈207为一柔性且弹性环形绝缘垫层，布置于所述电池壳体206、第二PCB 202与负极帽203的空隙中，所述密封圈207的截面呈
Figure PCTCN2015096609-appb-000005
状，
Figure PCTCN2015096609-appb-000006
状的一部分用于在电池壳体206的挤压下固定第一PCB 201和第二PCB 202于匝线205处，另一部分用于隔离电池壳体206和负极帽203，密封负极帽203、电池壳体206及第一PCB 201和第二PCB 202之间的空隙。密封圈207与电池壳体206内部接触的部位为圆弧形，用于配合电池壳体206的圆弧结构；其中，密封圈207用于隔离电池壳体206和负极帽203的部分，伸出并高于电池壳体206一定距离，并与负极帽203齐平。在电池壳体206与第一PCB和第二PCB接触的部位为加强接触镀锡210，以密封电路板与电池壳体之间的缝隙。通过第一PCB和第二PCB之间的通孔209，将电芯204引出的负极连接线208b(208a为正极连接线，图中未示出)与第一PCB和第二PCB上的导线相连。通孔209的内表面镀有导电材料，例如为镀铜，因此可以将多个电路板的布线可以通过通孔209连接在一起，并与负极帽和电路板接触的部位相连，从而将其传导至负极帽。
图3a为本发明的用于电化学电池的封口体配件300的剖视图。图3b为本发明的用于电化学电池的封口体配件300的剖视分解图。如图3a、3b所示，所述封口体配件300包括负极帽301、密封圈302、电路板模块303。优选地，电路板模块303上与负极帽301的边缘对应处设置有充电指示灯305。负极帽301与电路板模块303连接部位的形状为“C”型环状结构，即负极帽的边缘具有缺口304，缺口304为充电指示灯305的通 光口，所述缺口304具有一定的高度但不超过负极帽的高度(如图3c所示)，用以将充电指示灯305暴露出来，其位置对应电路板模块303上的充电指示灯305的位置。密封圈302为一柔性且弹性环形绝缘垫层，能够完全覆盖住充电指示灯305的通光口(如图3d所示)，密封圈302的材料为透明导光材料，能够使充电指示灯305发出的亮光透过所述密封圈并使得整个密封圈透光。
图4为本发明密封圈用于电化学电池充电时与充电器配合的示意图。如图4所示，电池需要充电时，当将其放入充电电池盒时有可能会因为充电电池盒内部的弹片或弹簧与作为正极的电池壳体误接触而发生短路。应用本发明密封圈的电化学电池400，具有布置于电池壳体401、电路板模块402与负极帽403的空隙中的密封圈404，所述密封圈404的截面呈
Figure PCTCN2015096609-appb-000007
状，
Figure PCTCN2015096609-appb-000008
状的一部分用于在电池壳体401的挤压下固定电路板模块402，另一部分用于隔离电池壳体401和负极帽403，密封负极帽403、电池壳体401及电路板模块402。而且，密封圈404用于隔离电池壳体401和负极帽403的部分，伸出并高于电池壳体401一定距离，并与负极帽403齐平，这样可以使充电电池盒内部的弹片或弹簧接触不到电池壳体而防止电池在充电时产生短路。
本发明的用于二次电池负极封口体的密封圈结构设计巧妙合理，不仅能够密封电池壳体、电路板模块与负极帽之间的空隙，隔离电池的正负极，还可以在电池充电时防止产生短路。
结合这里披露的本发明的说明和实践，本发明的其他实施例对于本领域技术人员都是易于想到和理解的。说明和实施例仅被认为是示例性的，本发明的真正范围和主旨均由权利要求所限定。

Claims (10)

  1. 一种用于二次电池负极封口体的密封圈，所述封口体用于封闭所述二次电化学电池的电池壳体的开口部，其中所述封口体包括：负极帽、电路板模块和密封圈，
    所述负极帽位于所述电池封口体的最外侧，所述电路板模块位于所述负极帽内侧，与负极帽通过连接件连接；
    所述电路板模块为塑料柔性电路板，具有一定的弹性，通过所述密封圈的挤压产生弹性形变用于卡在所述电池壳体内部；
    所述密封圈为一柔性且弹性环形绝缘垫层，布置于所述电池壳体、电路板模块与负极帽的空隙中，所述密封圈的截面呈
    Figure PCTCN2015096609-appb-100001
    状，
    Figure PCTCN2015096609-appb-100002
    状的一部分用于在所述电池壳体的挤压下固定电路板模块，另一部分用于隔离所述电池壳体和所述负极帽，密封所述负极帽、电池壳体及电路板模块；
    所述密封圈与电池壳体内部接触的部位为圆弧形，用于配合电池壳体的圆弧结构；
    所述密封圈用于隔离所述电池壳体和所述负极帽的部分，伸出并高于所述电池壳体一定距离，并与所述负极帽齐平，以防止所述电池在充电时产生短路。
  2. 根据权利要求1所述的密封圈，其中所述电路板模块与所述负极帽之间的连接件为焊料。
  3. 根据权利要求1所述的密封圈，其中所述电路板模块与所述负极帽之间的连接件为卡扣连接。
  4. 根据权利要求3所述的密封圈，其中所述负极帽的边缘处设置有至少两个卡头，用于将所述负极帽固定在所述电路板模块上。
  5. 根据权利要求3所述的密封圈，其中所述电路板模块相对于所述负极帽的一侧上对应于所述负极帽的边缘位置设置有至少两个卡槽，用于安装所述负极帽。
  6. 根据权利要求1所述的密封圈，其中所述电路板模块为至少一块印刷电路板。
  7. 根据权利要求1所述的密封圈，其中所述电路板模块的电路负极输出端设置在所述负极帽与电路板的连接处，使负极输出与电路接地共线。
  8. 根据权利要求1所述的密封圈，其中所述负极帽与电路板模块连接部位的形状为“C”型环状结构。
  9. 根据权利要求1所述的密封圈，其中所述密封圈的材料为透明导光材料。
  10. 一种包含如权利要求1所述的密封圈的二次电化学电池，所述电池还包括电芯和正极帽，其中，
    所述正极帽与所述电池壳体连接构成所述二次电池的正极；
    所述电芯放置于所述电池壳体内，位于所述正极帽与所述电路板模块之间。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109216597A (zh) * 2018-09-07 2019-01-15 苏州安靠电源有限公司 圆柱形电池及其密封圈

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1309431A (zh) * 2000-02-16 2001-08-22 三星Sdi株式会社 密封电池
CN101420051A (zh) * 2007-10-26 2009-04-29 三星Sdi株式会社 二次电池
CN202695572U (zh) * 2012-07-09 2013-01-23 深圳市豪鹏科技有限公司 密封圈以及使用该密封圈的镍氢电池
CN104900840A (zh) * 2015-06-12 2015-09-09 福建南平南孚电池有限公司 一种用于二次电池负极封口体的密封圈
CN204793020U (zh) * 2015-06-12 2015-11-18 福建南平南孚电池有限公司 一种用于二次电池负极封口体的密封圈及二次电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1309431A (zh) * 2000-02-16 2001-08-22 三星Sdi株式会社 密封电池
CN101420051A (zh) * 2007-10-26 2009-04-29 三星Sdi株式会社 二次电池
CN202695572U (zh) * 2012-07-09 2013-01-23 深圳市豪鹏科技有限公司 密封圈以及使用该密封圈的镍氢电池
CN104900840A (zh) * 2015-06-12 2015-09-09 福建南平南孚电池有限公司 一种用于二次电池负极封口体的密封圈
CN204793020U (zh) * 2015-06-12 2015-11-18 福建南平南孚电池有限公司 一种用于二次电池负极封口体的密封圈及二次电池

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109216597A (zh) * 2018-09-07 2019-01-15 苏州安靠电源有限公司 圆柱形电池及其密封圈

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