WO2017113352A1 - 一种电池 - Google Patents

一种电池 Download PDF

Info

Publication number
WO2017113352A1
WO2017113352A1 PCT/CN2015/100250 CN2015100250W WO2017113352A1 WO 2017113352 A1 WO2017113352 A1 WO 2017113352A1 CN 2015100250 W CN2015100250 W CN 2015100250W WO 2017113352 A1 WO2017113352 A1 WO 2017113352A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
case
lead
battery case
battery according
Prior art date
Application number
PCT/CN2015/100250
Other languages
English (en)
French (fr)
Inventor
何自坚
Original Assignee
深圳市大富精工有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市大富精工有限公司 filed Critical 深圳市大富精工有限公司
Priority to PCT/CN2015/100250 priority Critical patent/WO2017113352A1/zh
Priority to CN201580079833.4A priority patent/CN107615511B/zh
Publication of WO2017113352A1 publication Critical patent/WO2017113352A1/zh

Links

Images

Classifications

    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
    • 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 of a single cell or a single battery
    • H01M50/14—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
    • H01M50/145—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors for protecting against corrosion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to the technical field of battery packaging, and in particular to a battery.
  • FIG. 1 is a partial cross-sectional view showing a conventional battery package structure in the prior art.
  • the package structure of the battery is: loading the battery core 4 into the metal tube 2, and riveting the metal
  • the tube 2 produces a rivet compression port 5 which is crimped into the metal tube 2 to form a sealed battery.
  • This battery package has the following drawbacks:
  • the heat dissipation performance of the battery is poor, which is not conducive to combining into a high-power battery.
  • the safety performance of the battery is poor, especially in special cases such as impact and internal short circuit, it is particularly easy to explode from the rivet compression port 5.
  • the embodiment of the invention provides a battery to solve the technical problem of poor safety, tightness and heat dissipation of the battery in the prior art.
  • an embodiment of the present invention provides a battery including a battery core and a battery case, the battery core is disposed in the battery case, and the bottom of the battery case is provided with at least one protruding from a bottom plane. a groove for storing the leaked chemical when the cell expands and bursts.
  • the battery further includes a sensing chip disposed in the recess, and the sensing chip further includes a temperature sensor and a pressure sensor.
  • the battery case is further provided with a safety hole.
  • the sensor chip is further connected with a signal output end, A through hole for passing through the signal output end is provided on the battery case.
  • the battery case further includes an upper case and a lower case, the upper case and the lower case are made of metal, and the upper case and the lower case are passed through the laser for the whole circumference.
  • the battery case is formed by corrugated sealing welding, and the battery core is disposed in the battery case.
  • the upper case and the lower case are made of stainless steel.
  • the battery includes a plurality of sets of battery cells, and the plurality of sets of battery cells are disposed in the battery case.
  • the battery further includes a lead wire respectively connected to the plurality of battery cells, and a side of the upper case or the lower case is provided with a lead hole, and the lead wire passes through the lead The lead holes are led out.
  • the outer shape of the battery case includes a rectangular parallelepiped, a cube, and a cylinder.
  • the battery core is encapsulated in an aluminum foil film into the same shape as the inside of the battery case, and is then loaded into the battery case.
  • the number of the leads is one or more, and the number of the lead holes is one or two of the side faces of the upper case or the lower case, and each lead hole has a lead wire passing through And the size of the lead hole is slightly larger than the outer peripheral size of the lead.
  • the battery provided by the present invention can temporarily store and buffer when the battery core has an explosion burst by providing a safety hole and an explosion-proof storage tank at the bottom of the battery case.
  • the sensor chip is installed in the explosion-proof storage tank, which can be used for real-time detection inside the battery to further ensure the safe operation of the battery.
  • high-power battery packs which require long-term charging and high power
  • FIG. 1 is a partial cross-sectional view showing a conventional battery package structure in the prior art
  • FIG. 2 is a schematic view showing the overall structure of a first embodiment of the battery of the present invention.
  • Figure 3 is a partial cross-sectional view showing the structure of the battery in the embodiment of Figure 2;
  • FIG. 4 is a schematic structural view of a first embodiment of a method for soldering a battery can according to the present invention
  • Figure 5 is a partial structural view showing the structure of the battery in the embodiment of Figure 2;
  • FIG. 6 is a schematic structural view of a second embodiment of a method for soldering a battery can according to the present invention.
  • Figure 7 is a partial enlarged view of the structure B of the weld in the embodiment of Figure 6;
  • Figure 8 is an enlarged schematic view showing the structure of a welded portion of a third embodiment of a method for soldering a battery can according to the present invention.
  • Figure 9 is an enlarged schematic view showing the structure of a welded portion of a fourth embodiment of a method for soldering a battery can according to the present invention.
  • Figure 10 is an enlarged schematic view showing the structure of a welded portion of a fifth embodiment of a method for soldering a battery can according to the present invention.
  • Figure 11 is a partial cross-sectional view showing a second embodiment of the battery of the present invention.
  • Figure 12 is a partial cross-sectional view showing a third embodiment of the battery of the present invention.
  • FIG. 13 is a schematic diagram showing the structure of the sensor chip 400 in the embodiment of FIG.
  • FIG. 2 is a schematic overall structural view of a first embodiment of the battery of the present invention
  • FIG. 3 is a partial cross-sectional view showing the structure of the battery of the embodiment of FIG. 2.
  • the battery includes, but is not limited to, the following structural elements: a battery cell 100 and a battery can 200.
  • the battery case 200 further includes an upper case 210 and a lower case 220, wherein the upper case 210 and the lower case 220 are made of metal, and the upper case 210 and the lower case 220 are completely formed by laser full-circle corrugated sealing welding.
  • 202 shows laser welding lines, and the specific structure of the welding form between the upper case 210 and the lower case 220 and the laser welding pattern 202 will be described in detail later.
  • the upper shell 210 and the lower shell 220 are made of stainless steel because the stainless steel has the advantages of high strength, corrosion resistance and the like.
  • the specific models of stainless steel are not listed here.
  • the shape of the battery case 200 is not limited to the rectangular parallelepiped structure in the illustrated embodiment, and may include a square, a cylinder, a sphere, and other irregular shapes.
  • the battery cell 100 is encapsulated in an aluminum foil film to have the same or similar shape as the inside of the battery can 200, and is then housed in the battery can 200. Further preferably, the battery may include a plurality of sets of battery cells (indicated in the figure), and the plurality of sets of battery cells are disposed in the battery case 200.
  • the battery further includes a lead 110, which is respectively connected to a plurality of sets of battery cells, and a side of the lower case 220 is provided with a lead hole 221 through which the lead 110 is led out.
  • the lead holes may also be disposed on the upper case 210, which are within the understanding of those skilled in the art and will not be described in detail herein.
  • the number of the lead wires 110 may be one or more.
  • the number of the lead holes provided on the side of the upper case 210 or the lower case 220 may also be one or two. To ensure the overall sealing of the battery case 200, each lead hole is provided. Lead wires are passed through, and the size of the lead holes is slightly larger than the outer peripheral size of the leads.
  • the bottom of the lower casing 220 is provided with a recess 222 that protrudes from the bottom plane, and the function and specific structure with respect to the recess 222 will be described in detail in later embodiments.
  • the embodiment of the present invention further provides a battery case.
  • a battery case For detailed technical features of the battery case, refer to the detailed description in the foregoing embodiment, and details are not described herein again.
  • the battery and the battery case thereof provided by the invention have a battery case which is made of a metal material, and is formed by a laser full-circle corrugated seal to form a sealed cavity, and the battery core is disposed inside the battery case cavity. Since the battery case is made of metal material and laser welding process, the battery structure has the characteristics of high safety, good heat dissipation and strong sealing.
  • the invention also provides a welding method of a battery case, which is to form a sealed cavity by laser full-circle corrugation of a battery case composed of at least two parts. Please refer to the following examples for details.
  • FIG. 4 is a schematic structural view of a first embodiment of a method for soldering a battery can according to the present invention, that is, a partially enlarged view of a structure A of a soldering portion in the embodiment of FIG. 2; in this embodiment, a battery case
  • the welded sides (215 and 225) of the welded portion are arranged in abutting manner on the sides of the parallel battery case, the welded side 215 of the upper case 210 is bent at a right angle with respect to the top surface of the upper case, and the welded side 225 of the lower case 220 is straight.
  • the welded side 215 corresponding to the upper case 210 encloses the welded side 225 of the lower case 220, and the laser welded pattern 202 is distributed in a wave shape on the outer side of the overlapping face of the welded sides on both sides.
  • the wave shape of the laser welding pattern 202 is not limited to the linear folding in the illustration in the embodiment, and may be other wavy linearity such as sinusoidal linearity, which is not within the scope of the person skilled in the art. An enumeration.
  • FIG. 5 is a partial schematic structural view of the battery structure in the embodiment of FIG. 2.
  • the lowest point of the undulation i.e., laser weld pattern 202 spans the bottom edge 2151 of the weld rim 215.
  • the wavy line has a wavy centerline with the bottom edge 2151 of the welded edge 215, that is, the wavy line in FIG. 5 has the same height on both sides of the bottom edge 2151.
  • the battery case 200 (including the upper case 210 and the lower case 220) is made of 0.07 mm thick stainless steel, and the laser welded spot diameter is 0.08 mm; the distance between adjacent peaks or troughs of the wave-shaped laser welded pattern 202 L is 0.16 mm.
  • the welded structure in this embodiment has the advantages that the upper and lower shells are easy to manufacture, the welded area (i.e., the overlapping area of the upper and lower welded sides) is large, and the sealing performance is good.
  • FIG. 6 is a schematic structural view of a second embodiment of a method for soldering a battery can according to the present invention
  • FIG. 7 is a partial enlarged view of a structure B of the soldering portion in the embodiment of FIG.
  • the welded sides (215, 225) on both sides of the welded portion of the battery case extend outward along the side of the battery case, and are welded on both sides.
  • the edges (215, 225) are placed in close contact with each other, and the laser welding pattern 202 is distributed in a wave shape on the outer side of the overlapping faces of the welded sides (215, 225) on both sides.
  • both side soldering edges (215, 225) are bent at right angles to the side of the battery case.
  • the battery case 200 (including the upper case 210 and the lower case 220) is made of 0.07 mm thick stainless steel, laser
  • the spot diameter of the weld is 0.08 mm; the distance between adjacent peaks or troughs of the wavy laser weld pattern 202 is 0.16 mm (not shown in the figure of this embodiment, see Fig. 5).
  • the wave shape of the laser welding grain 202 is also not limited to the linear folding in the illustration in the embodiment, and may be other wavy linearity such as sinusoidal linearity.
  • the welded structure in this embodiment has the advantages that the upper and lower shells are easy to manufacture, the gap between the upper and lower shells is small during assembly, and the reliability of laser welding is high.
  • FIG. 8 is an enlarged schematic view showing the structure of the welding portion of the third embodiment of the method for soldering the battery can according to the present invention.
  • the welded edges (215, 225) on both sides are at right angles to the side of the battery case. Bending, the welded edge projects outwardly relative to the housing, which increases the peripheral dimensions of the battery case. Therefore, this embodiment is a modification of the embodiment of FIG. 6.
  • the overlap is bent in the direction parallel to the side of the battery case to reduce the outer size of the battery case while making the battery case as a whole more beautiful.
  • FIG. 9 is an enlarged schematic view showing the structure of a welded portion of a fourth embodiment of a method for soldering a battery can according to the present invention.
  • one side of the welded portion of the battery can welded portion (in this embodiment, a lower welded side, and in other embodiments, an upper welded side) is provided with a connection formed by bending the outside of the battery case.
  • the flange 225, the connecting flange 225 encloses the other side of the welded side 215 from the outside, and the welded sides (the flange 225 and the welded side 215) are overlapped and disposed in the side direction of the battery case, and the laser welding pattern 202 is The outer sides of the overlapping sides (215, 225) are undulated on the outer side of the overlapping faces.
  • the material of the battery case 200 (including the upper case 210 and the lower case 220) is also 0.07 mm thick stainless steel, and the spot diameter of the laser welding is 0.08 mm; between adjacent peaks or troughs of the wave-shaped laser welded pattern 202 The distance is 0.16 mm (not shown in the figure of this embodiment, see Fig. 5).
  • the wave shape of the laser welding grain 202 is also not limited to the linear folding in the illustration in the embodiment, and may be linear or sinusoidal linear or the like.
  • the welded structure in this embodiment has the advantages that the upper and lower shells are easy to manufacture and assemble, and the upper and lower shells can be manufactured by stretching, and the reliability of laser welding is also high.
  • FIG. 10 is an enlarged schematic view showing the structure of a welded portion of a fifth embodiment of a method for soldering a battery can according to the present invention.
  • one side welded side (in this embodiment, the upper welded side) of the welded portion of the battery case is provided with an n-shaped bent groove 215 which is integrally raised on the top of the upper case 210.
  • the welding edge 225 on the other side is inserted into the bending groove 215 and abuts against the inner side surface of the bending groove 215, and the laser welding grain 202 is welded on both sides (the outer straight side and the welded side 225 of the bending groove 215).
  • the outer surface of the abutment surface is wavy.
  • the material of the battery case 200 (including the upper case 210 and the lower case 220) is also 0.07 mm thick stainless steel, and the spot diameter of the laser welding is 0.08 mm; between adjacent peaks or troughs of the wave-shaped laser welded pattern 202 The distance is 0.16 mm (not shown in the figure of this embodiment, see Fig. 5).
  • the wave shape of the laser welding grain 202 is also not limited to the linear folding in the illustration in the embodiment, and may be linear or sinusoidal linear or the like.
  • the welded structure of this embodiment has the advantage that the upper casing 210 is flanged on the lower casing 220 in such a manner that it can be either a spin-on seal or a laser welded seal in this embodiment.
  • the battery structure has good overall sealing and aesthetics.
  • Embodiments of the present invention also provide a battery case and a battery, and the shape of the battery case includes a rectangular parallelepiped, a cube, a cylinder, a sphere, and other irregular shapes.
  • the bottom of the battery case may also be provided with a groove protruding from the bottom plane (please refer to the structure in Fig. 3, and the effect and specific structure of the groove will be behind Detailed in the embodiment of the face).
  • the battery provided by the embodiment of the present invention includes a battery core and the battery case described in the above embodiments. For the specific structural characteristics of the battery, please refer to FIG. 2 to FIG. 10 and its corresponding related description.
  • FIG. 11 is a partial cross-sectional view showing a second embodiment of the battery of the present invention.
  • the battery includes, but is not limited to, the following structural elements: a battery cell 100 and a battery can 200.
  • the battery case 200 further includes an upper case 210 and a lower case 220, wherein the upper case 210 and the lower case 220 may be made of metal, and the upper case 210 and the lower case 220 are formed by laser full-circle corrugated sealing welding.
  • the battery case 200 of a complete structure; the battery cell 100 is disposed in the battery case 200.
  • 202 shows laser welding lines, and for the specific structure of the welding form between the upper case 210 and the lower case 220 and the laser welding pattern 202, refer to the detailed description in the above embodiment. It will not be repeated here.
  • the bottom of the lower case 220 is provided with a groove 222 protruding from the bottom plane, and the groove 222 is used for storing leaked chemicals such as electrolyte of the battery when the battery cell expands and bursts.
  • the structure of the groove 222 may be a strip shape, a ring shape or the like distributed on the bottom of the lower shell 220, and the number may also be one (ring) or multiple (ring).
  • the groove 222 is designed as an explosion-proof storage tank. When the battery core 100 is heated, impacted or short-circuited, the expanded volume is first filled in the explosion-proof storage tank.
  • the side of the lower case 220 is further provided with a safety hole 300.
  • the safety hole 300 is not limited to being disposed on the lower case 220, and may be disposed on the upper case 210.
  • FIG. 12 is a partial cross-sectional view showing a third embodiment of the battery of the present invention.
  • the battery structure in this embodiment is provided with an inductive chip 400 inside the recess 222.
  • the chip 400 is used to detect the internal condition of the battery to transmit information inside the battery case 2 to the control terminal.
  • FIG. 13 is a schematic diagram showing the structure of the sensor chip 400 in the embodiment of FIG.
  • the sensor chip 400 is further provided with a temperature sensor 410, a pressure sensor 420, and a signal output terminal 430.
  • a through hole (not shown) for passing through the signal output end 430 is provided on the lower case 220.
  • the temperature sensor 410 is used to sense the temperature of the current battery cell 100; the pressure sensor 420 is used to sense whether the current battery core is thermally expanded, and transmits a signal to the sensor chip 400 to determine whether the expansion coefficient is overloaded;
  • the chip 400 is used to process the temperature and pressure signals of the current battery cell 100 detected by the temperature sensor 410 and the pressure sensor 420, and determine whether the battery core 100 is heated, impacted, short-circuited, etc., and output through the signal output terminal 430. Signals to the external circuit whether to disconnect the current battery.
  • the material of the upper shell 210 and the lower shell 220 may be stainless steel, because the stainless steel has the advantages of high strength, corrosion resistance and the like.
  • the specific models of stainless steel are not listed here.
  • the shape of the battery case 200 is not limited to a similar rectangular parallelepiped structure in the illustrated embodiment, and may include a square body, a cylinder, a sphere, and other irregularly shaped bodies.
  • the battery cell 100 is encapsulated in an aluminum foil film to have the same or similar shape as the inside of the battery can 200, and is then housed in the battery can 200. Further preferably, the battery may include a plurality of sets of battery cells (indicated in the figure), and the plurality of sets of battery cells are disposed in the battery case 200.
  • the battery further includes a lead 110, which is respectively connected to a plurality of sets of battery cells, and a side of the lower case 220 is provided with a lead hole 221 through which the lead 110 is led out.
  • the lead holes may also be disposed on the upper case 210, which are within the understanding of those skilled in the art and will not be described in detail herein.
  • the number of the lead wires 110 may be one or more.
  • the number of the lead holes provided on the side of the upper case 210 or the lower case 220 may also be one or two. To ensure the overall sealing of the battery case 200, each lead hole is provided. Lead wires are passed through, and the size of the lead holes is slightly larger than the outer peripheral size of the leads.
  • the battery provided by the present invention can temporarily store and buffer when the battery core has an explosion burst by providing a safety hole and an explosion-proof storage tank at the bottom of the battery case.
  • the sensor chip is installed in the explosion-proof storage tank, which can be used for real-time detection inside the battery to further ensure the safe operation of the battery.
  • high-power battery packs which require long-term charging and high power

Abstract

一种电池，包括电池芯(100)和电池壳(200)，电池芯(100)设于电池壳(200)内，电池壳(200)底部设有至少一条突出于底部平面的凹槽(222)，该凹槽(222)用于在电池芯(100)膨胀爆裂时储存泄露出的化学物质；电池还包括设于凹槽(222)内的感应芯片(400)，感应芯片(400)上进一步包括温度传感器(410)和压力传感器(420)；电池壳(200)上设有安全孔(300)。该电池，通过在电池壳(200)上底部设置安全孔(300)和防爆储存槽，当电池芯(100)有膨胀爆裂的情况可以起到暂时存储和缓冲的作用。另外，还在防爆储存槽内安装感应芯片(400)，可以用于对电池内部的实时检测，进一步保障电池安全工作。当电池组里面个别电池出现受热、撞击或者短路时，要能及时识别哪个电池出问题，通过外部电路及时切断相应小电池，可以保护整组大功率电池不受损坏。

Description

一种电池 【技术领域】
本发明涉及电池封装的技术领域，具体是涉及一种电池。
【背景技术】
电池作为一种常用的能源提供单元，其安全性一直备受关注。传统的电池封装结构如图1所示，图1为现有技术中一种常用电池封装结构的局部剖视图，该电池的封装结构为：把电池芯4装入金属管2内，通过铆压金属管2产生铆压缩口5，把密封端盖3扣压在金属管2内，形成密封的电池。这种电池封装存在以下缺陷：
1.铆压缩口5的密封性能差，一旦电池内的电解液受热膨胀后会从此处泄露。
2.电池的散热性能差，不利于组合成大功率电池。
3.电池的安全性能差，特别是在撞击、内部短路等特殊情况下，特别容易从铆压缩口5处爆炸。
【发明内容】
本发明实施例提供一种电池，以解决现有技术中电池安全性、密封性以及散热性差的技术问题。
为解决上述问题，本发明实施例提供了一种电池，所述电池包括电池芯和电池壳，所述电池芯设于所述电池壳内，所述电池壳底部设有至少一条突出于底部平面的凹槽，所述凹槽用于在所述电池芯膨胀爆裂时储存泄露出的化学物质。
根据本发明一优选实施例，所述电池还包括设于所述凹槽内的感应芯片，所述感应芯片上进一步包括温度传感器和压力传感器。
根据本发明一优选实施例，所述电池壳上还设有安全孔。
根据本发明一优选实施例，所述感应芯片进一步连接有信号输出端，所述 电池壳上设有用于通过所述信号输出端的通孔。
根据本发明一优选实施例，所述电池壳进一步包括上壳和下壳，所述上壳和所述下壳的材质均为金属，所述上壳和所述下壳之间通过激光全周波纹密封焊接形成所述电池壳，所述电池芯设于所述电池壳内。
根据本发明一优选实施例，所述上壳和所述下壳的材质为不锈钢。
根据本发明一优选实施例，所述电池包括多组电池芯，所述多组电池芯设于所述电池壳内。
根据本发明一优选实施例，所述电池还包括引线，所述引线分别与所述多组电池芯连接，所述上壳或所述下壳的侧面设有引线孔，所述引线通过所述引线孔引出。
根据本发明一优选实施例，所述电池壳的外形包括长方体、正方体、圆柱体。
根据本发明一优选实施例，所述电池芯为电解液通过铝箔膜封装成与所述电池壳内部形状相同，进而装入所述电池壳内。
根据本发明一优选实施例，所述引线的数量为一条或多条，所述上壳或所述下壳的侧面设有引线孔的数量为一个或两个，每一引线孔均有引线通过，且所述引线孔的尺寸略大于所述引线的外周尺寸。
相对于现有技术，本发明提供的电池，通过在电池壳上底部设置安全孔和防爆储存槽，当电池芯有膨胀爆裂的情况可以起到暂时存储和缓冲的作用。另外，还在防爆储存槽内安装感应芯片，可以用于对电池内部的实时检测，进一步保障电池安全工作。尤其是在大功率电池组中，需要长时间充电以及较大功率，通常的做法都是将小电池组合成大容量电池。当电池组里面个别电池出现受热、撞击或者短路时，要能及时识别哪个电池出问题，通过外部电路及时切断相应小电池，可以保护整组大功率电池不受损坏。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，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是现有技术中一种常用电池封装结构的局部剖视图；
图2是本发明电池第一实施例的整体结构示意图；
图3是图2实施例中电池结构的局部剖视图；
图4是本发明电池壳焊接方法第一实施例的结构示意图；
图5是图2实施例中电池结构的局部结构示意图；
图6是本发明电池壳焊接方法第二实施例的结构示意图；
图7是图6实施例中焊接处结构B的局部放大图；
图8是本发明电池壳焊接方法第三实施例的焊接处结构放大示意图；
图9是本发明电池壳焊接方法第四实施例的焊接处结构放大示意图；
图10是本发明电池壳焊接方法第五实施例的焊接处结构放大示意图；
图11是本发明电池第二实施例的局部结构剖视图；
图12是本发明电池第三实施例的局部结构剖视图；以及
图13是图12实施例中感应芯片400的结构示意简图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请一并参阅图2和图3，图2是本发明电池第一实施例的整体结构示意图；图3是图2实施例中电池结构的局部剖视图。该电池包括但不限于以下结构元件：电池芯100以及电池壳200。
具体而言，电池壳200进一步包括上壳210和下壳220，其中，上壳210和下壳220的材质均为金属，上壳210和下壳220之间通过激光全周波纹密封焊接形成完整结构的电池壳200；电池芯100设于电池壳200内。图中202表示激光焊接纹路，而关于上壳210和下壳220之间焊接形式以及激光焊接纹路202的具体结构将在后面的内容中进行详细描述。
优选地，该上壳210和下壳220的材质均为不锈钢，因为不锈钢具有强度高，耐腐蚀等优点。关于不锈钢材质的具体型号此处不再一一列举。其中，电池壳200的外形并不限于图示实施例中的带圆角的长方体结构，还可以包括正方体、圆柱体、球体以及其他不规则形状体。
该电池芯100为电解液通过铝箔膜封装成与电池壳200内部形状相同或者相类似，进而装入电池壳200内。进一步优选地，该电池可以包括多组电池芯(图中为标示)，多组电池芯设于电池壳200内。
该电池还包括引线110，引线110分别与多组电池芯连接，下壳220的侧面设有引线孔221，引线110通过引线孔221引出。当然，在其他实施例中，引线孔还可以设在上壳210上，在本领域技术人员的理解范围内，此处不再详述。其中，引线110的数量可以为一条或多条，上壳210或下壳220的侧面设有引线孔的数量也可以为一个或两个，为保证电池壳200的整体密封性，每一引线孔均有引线通过，且引线孔的尺寸略大于引线的外周尺寸。
进一步优选地，下壳220的底部设有突出于底部平面的凹槽222，关于凹槽222的作用及具体结构将在后面的实施例中详述。
另外，本发明实施例还提供一种电池壳，关于电池壳的详细技术特征请参阅上述实施例中的具体描述，此处亦不再赘述。
相对于现有技术，本发明提供的电池及其电池壳，其电池壳为金属材料，并通过激光全周波纹密封焊接形成密封的腔体，电池芯设于电池壳腔体内部。由于该电池壳采用金属材质加激光焊接工艺制成，使该电池结构具有安全性高、散热性好以及密封性强的特点。
本发明还提供一种电池壳的焊接方法，该焊接方法为将至少由两个部分组成的电池壳通过激光全周波纹焊接形成密封腔体。具体请参阅以下实施例。
焊接方法实施例1
请一并参阅图2和图4，图4是本发明电池壳焊接方法第一实施例的结构示意图，即图2实施例中焊接处结构A的局部放大图；在该实施例中，电池壳焊接部分的两侧焊接边(215和225)呈平行电池壳的侧面重叠紧靠设置，上壳210的焊接边215相对于上壳顶面呈直角弯折，下壳220的焊接边225为直边，相当于上壳210的焊接边215包住下壳220的焊接边225，激光焊接纹路202在两侧焊接边的重叠面外侧上呈波浪形分布。
当然，激光焊接纹路202的波浪形状并不限于本实施例中图示中的直线折叠，还可以为正弦线性等其他类似波浪的线性，在本领域技术人员的理解范围内，此处不再一一列举。
请一并参阅图5，图5是图2实施例中电池结构的局部结构示意图。优选地，该波浪纹(即激光焊接纹路202)的最低点跨过焊接边215的底边2151。更优选地，该波浪纹以焊接边215的底边2151为波浪纹中线，即图5中波浪纹位于底边2151两侧的高度相同。
优选地，电池壳200(包括上壳210和下壳220)的材质为0.07mm厚的不锈钢，激光焊接的光斑直径为0.08mm；波浪形激光焊接纹路202的相邻波峰或波谷之间的距离为L为0.16mm。
该实施例中的焊接结构的优点在于：上、下壳制造容易，焊接面积(即上、下焊接边的重叠面积)大，密封性能好。
焊接方法实施例2
请一并参阅图6和图7，图6是本发明电池壳焊接方法第二实施例的结构示意图；图7是图6实施例中焊接处结构B的局部放大图。在该实施例中，电池壳焊接部分的两侧焊接边(215、225)沿电池壳侧面向外侧延伸，且两侧焊接 边(215、225)重叠紧靠设置，激光焊接纹路202在两侧焊接边(215、225)的重叠面外侧上呈波浪形分布。
优选地，两侧焊接边(215、225)均相对于电池壳侧面呈直角弯折，同样优选地，电池壳200(包括上壳210和下壳220)的材质为0.07mm厚的不锈钢，激光焊接的光斑直径为0.08mm；波浪形激光焊接纹路202的相邻波峰或波谷之间的距离为为0.16mm(本实施例的图中未标示，请参阅图5)。激光焊接纹路202的波浪形状也并不限于本实施例中图示中的直线折叠，还可以为正弦线性等其他类似波浪的线性。
该实施例中的焊接结构的优点在于：上、下壳制造容易，装配过程中上、下壳的缝隙小，激光焊接的可靠性较高。
焊接方法实施例3
请参阅图8，图8是本发明电池壳焊接方法第三实施例的焊接处结构放大示意图，在图6实施例中，由于两侧焊接边(215、225)均相对于电池壳侧面呈直角弯折，焊接边相对于壳体向外伸出，这样会增加电池壳的外围尺寸，因此，该实施例作为图6实施例的一种变形，在图6实施例的基础上，将焊接后的重叠面向平行电池壳侧面的方向弯折，以减小电池壳的外围尺寸，同时使电池壳整体更加美观。
焊接方法实施例4
请参阅图9，图9是本发明电池壳焊接方法第四实施例的焊接处结构放大示意图。在该实施例中，电池壳焊接部分的一侧焊接边(在该实施例中为下焊接边，在其他实施例中也可以为上焊接边)设有向电池壳外侧弯折形成的连接凸缘225，连接凸缘225从外侧包住另一侧的焊接边215，且两侧焊接边(凸缘225和焊接边215)沿电池壳的侧面方向重叠紧靠设置，激光焊接纹路202在两侧焊接边(215、225)的重叠面外侧上呈波浪形分布。
优选地，电池壳200(包括上壳210和下壳220)的材质同样为0.07mm厚的不锈钢，激光焊接的光斑直径为0.08mm；波浪形激光焊接纹路202的相邻波峰或波谷之间的距离为为0.16mm(本实施例的图中未标示，请参阅图5)。激光焊接纹路202的波浪形状也并不限于本实施例中图示中的直线折叠，还可以为直线型或者正弦线性等其他类似波浪的线性。
该实施例中的焊接结构的优点在于：上、下壳制造及装配过程容易，通过拉伸即可完成上、下壳的制造，激光焊接的可靠性同样较高。
焊接方法实施例5
请参阅图10，图10是本发明电池壳焊接方法第五实施例的焊接处结构放大示意图。在该实施例中，电池壳焊接部分的一侧焊接边(在该实施例中为上焊接边)设有呈n型的弯折槽215，弯折槽215整体凸起于上壳210的顶面，另一侧的焊接边225插入该弯折槽215内并与弯折槽215内侧面紧靠，激光焊接纹路202在两侧焊接边(弯折槽215的外侧直边与焊接边225)的紧靠面外侧上呈波浪形分布。
优选地，电池壳200(包括上壳210和下壳220)的材质同样为0.07mm厚的不锈钢，激光焊接的光斑直径为0.08mm；波浪形激光焊接纹路202的相邻波峰或波谷之间的距离为为0.16mm(本实施例的图中未标示，请参阅图5)。激光焊接纹路202的波浪形状也并不限于本实施例中图示中的直线折叠，还可以为直线型或者正弦线性等其他类似波浪的线性。
该实施例中的焊接结构的优点在于：上壳210翻边扣在下壳220上，这种方式既可以采用旋压密封，也可以为本实施例中的激光焊接密封。其电池结构整体密封性和美观性较好。
本发明实施例还提供一种电池壳和电池，该电池壳的外形包括长方体、正方体、圆柱体、球体以及其他不规则形状体。电池壳的底部还可以设有突出于底部平面的凹槽(请参阅图3中的结构，而关于凹槽的作用及具体结构将在后 面的实施例中详述)。另外，该电池壳的其他部分结构及密封方式请参阅上述实施例中的相关描述，此处不再赘述。本发明实施例提供的电池包括电池芯以及上述实施例中描述的电池壳。关于电池的具体结构特征，请一并参阅图2-图10及其对应的相关描述。
进一步地，本发明实施例还提供一种电池，请参阅图11，图11是本发明电池第二实施例的局部结构剖视图。该电池包括但不限于以下结构元件：电池芯100以及电池壳200。
具体而言，电池壳200进一步包括上壳210和下壳220，其中，上壳210和下壳220的材质可以均为金属，上壳210和下壳220之间通过激光全周波纹密封焊接形成完整结构的电池壳200；电池芯100设于电池壳200内。图中202表示激光焊接纹路，而关于上壳210和下壳220之间焊接形式以及激光焊接纹路202的具体结构请参阅上述实施例中的详细内容描述。此处不再重复。
优选地，下壳220的底部设有突出于底部平面的凹槽222，凹槽222用于在电池芯膨胀爆裂时储存泄露出的化学物质，譬如电池的电解液等。其中，凹槽222的结构形式可以为条状、环状等分布于下壳220的底部，数量也可以为一条(环)或多条(环)。为了克服电池爆炸对外界造成影响，设计该凹槽222作为防爆储存槽，当电池芯100在受热、撞击或者短路等情况下，膨胀的体积先填充在防爆储存槽内。进一步优选地，该下壳220的侧边上还设有安全孔300，当电池芯100膨胀到体积超过防爆储存槽的容积后，再从电池壳的安全孔300泄露出去。可有效防止电池芯100里面带电电解液在爆炸时直接射出。另外，该安全孔300并不限于设在下壳220上，还可以设在上壳210上。
请参阅图12，图12是本发明电池第三实施例的局部结构剖视图；为了进一步控制和检测电池内部的工作状况，该实施例中的电池结构在凹槽222内部设置有感应芯片400，感应芯片400用于对电池内部情况进行检测，以便将电池壳2内部的信息传递给控制端。
请一并参阅图13，图13是图12实施例中感应芯片400的结构示意简图。 该感应芯片400上进一步设置有温度传感器410、压力传感器420以及信号输出端430。下壳220上设有用于通过信号输出端430的通孔(图中未标示)。其中，温度传感器410用于感应当前电池芯100的温度；压力感应器420用于感应当前电池芯的是否受热膨胀，并将信号传输到感应芯片400，用以判断膨胀系数是否有超负荷；感应芯片400则用于处理温度传感器410和压力传感器420检测到的当前电池芯100工作情况的的温度及压力信号，辨别电池芯100是否存在受热、撞击、短路等情况，并通过信号输出端430输出信号通知外部电路是否断开当前电池。
优选地，该上壳210和下壳220的材质均可以为不锈钢，因为不锈钢具有强度高，耐腐蚀等优点。关于不锈钢材质的具体型号此处不再一一列举。其中，电池壳200的外形并不限于图示实施例中的类似长方体结构，还可以包括正方体、圆柱体、球体以及其他不规则形状体。
该电池芯100为电解液通过铝箔膜封装成与电池壳200内部形状相同或者相类似，进而装入电池壳200内。进一步优选地，该电池可以包括多组电池芯(图中为标示)，多组电池芯设于电池壳200内。
该电池还包括引线110，引线110分别与多组电池芯连接，下壳220的侧面设有引线孔221，引线110通过引线孔221引出。当然，在其他实施例中，引线孔还可以设在上壳210上，在本领域技术人员的理解范围内，此处不再详述。其中，引线110的数量可以为一条或多条，上壳210或下壳220的侧面设有引线孔的数量也可以为一个或两个，为保证电池壳200的整体密封性，每一引线孔均有引线通过，且引线孔的尺寸略大于引线的外周尺寸。
相对于现有技术，本发明提供的电池，通过在电池壳上底部设置安全孔和防爆储存槽，当电池芯有膨胀爆裂的情况可以起到暂时存储和缓冲的作用。另外，还在防爆储存槽内安装感应芯片，可以用于对电池内部的实时检测，进一步保障电池安全工作。尤其是在大功率电池组中，需要长时间充电以及较大功率，通常的做法都是将小电池组合成大容量电池。当电池组里面个别电池出现 受热、撞击或者短路时，要能及时识别哪个电池出问题，通过外部电路及时切断相应小电池，可以保护整组大功率电池不受损坏。
以上所述仅为本发明的部分实施例，并非因此限制本发明的保护范围，凡是利用本发明说明书及附图内容所作的等效装置或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (11)

  1. 一种电池，其特征在于，所述电池包括电池芯和电池壳，所述电池芯设于所述电池壳内，所述电池壳底部设有至少一条突出于底部平面的凹槽，所述凹槽用于在所述电池芯膨胀爆裂时储存泄露出的化学物质。
  2. 根据权利要求1所述的电池，其特征在于，所述电池还包括设于所述凹槽内的感应芯片，所述感应芯片上进一步包括温度传感器和压力传感器。
  3. 根据权利要求1所述的电池，其特征在于，所述电池壳上还设有安全孔。
  4. 根据权利要求2所述的电池，其特征在于，所述感应芯片进一步连接有信号输出端，所述电池壳上设有用于通过所述信号输出端的通孔。
  5. 根据权利要求1所述的电池，其特征在于，所述电池壳进一步包括上壳和下壳，所述上壳和所述下壳的材质均为金属，所述上壳和所述下壳之间通过激光全周波纹密封焊接形成所述电池壳，所述电池芯设于所述电池壳内。
  6. 根据权利要求5所述的电池，其特征在于，所述上壳和所述下壳的材质为不锈钢。
  7. 根据权利要求1所述的电池，其特征在于，所述电池包括多组电池芯，所述多组电池芯设于所述电池壳内。
  8. 根据权利要求7所述的电池，其特征在于，所述电池还包括引线，所述引线分别与所述多组电池芯连接，所述上壳或所述下壳的侧面设有引线孔，所述引线通过所述引线孔引出。
  9. 根据权利要求1所述的电池，其特征在于，所述电池壳的外形包括长方体、正方体、圆柱体。
  10. 根据权利要求1所述的电池，其特征在于，所述电池芯为电解液通过铝箔膜封装成与所述电池壳内部形状相同，进而装入所述电池壳内。
  11. 根据权利要求8所述的电池，其特征在于，所述引线的数量为一条或多条，所述上壳或所述下壳的侧面设有引线孔的数量为一个或两个，每一引线孔均有引线通过，且所述引线孔的尺寸略大于所述引线的外周尺寸。
PCT/CN2015/100250 2015-12-31 2015-12-31 一种电池 WO2017113352A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2015/100250 WO2017113352A1 (zh) 2015-12-31 2015-12-31 一种电池
CN201580079833.4A CN107615511B (zh) 2015-12-31 2015-12-31 一种电池

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/100250 WO2017113352A1 (zh) 2015-12-31 2015-12-31 一种电池

Publications (1)

Publication Number Publication Date
WO2017113352A1 true WO2017113352A1 (zh) 2017-07-06

Family

ID=59224294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/100250 WO2017113352A1 (zh) 2015-12-31 2015-12-31 一种电池

Country Status (2)

Country Link
CN (1) CN107615511B (zh)
WO (1) WO2017113352A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112117480A (zh) * 2019-06-20 2020-12-22 南京德朔实业有限公司 电池包及采用该电池包的电动工具
CN113725529A (zh) * 2021-11-01 2021-11-30 中航锂电科技有限公司 一种电池及焊接方法
WO2023173936A1 (zh) * 2022-03-15 2023-09-21 深圳市格瑞普电池有限公司 具有可兼容连接装置的电池充电系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040033415A1 (en) * 2002-08-19 2004-02-19 Allis Electric Co., Ltd. Mobile rack type battery box for UPS system
CN101212033A (zh) * 2006-12-25 2008-07-02 比亚迪股份有限公司 一种二次电池防爆壳体及电池
CN201087908Y (zh) * 2007-03-13 2008-07-16 东莞新能源电子科技有限公司 柱形锂电池结构
KR20140074151A (ko) * 2012-12-07 2014-06-17 타이코에이엠피(유) 전지모듈
CN204632881U (zh) * 2015-05-29 2015-09-09 深圳市昂佳科技有限公司 一种带有安全保护装置的锂聚合物电池
CN205429014U (zh) * 2015-12-31 2016-08-03 深圳市大富精工有限公司 一种电池及其电池壳
CN205429015U (zh) * 2015-12-31 2016-08-03 深圳市大富精工有限公司 电池及其电池壳

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000084684A (ja) * 1998-09-09 2000-03-28 Mitsubishi Electric Corp エネルギービーム溶接装置及びエネルギービーム溶接方法
CN200976377Y (zh) * 2006-10-24 2007-11-14 比亚迪股份有限公司 软包装二次电池
JP6045783B2 (ja) * 2011-01-25 2016-12-14 株式会社東芝 二次電池及び二次電池の製造方法
JP5571137B2 (ja) * 2012-08-13 2014-08-13 株式会社東芝 密閉型２次電池の溶接方法、密閉型２次電池及びキャップ体
DE102013201160A1 (de) * 2013-01-24 2014-07-24 Robert Bosch Gmbh Batteriezelle mit einem Ausdehnungs-Berst-Bereich
CN205790078U (zh) * 2015-12-31 2016-12-07 深圳市大富精工有限公司 一种电池

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040033415A1 (en) * 2002-08-19 2004-02-19 Allis Electric Co., Ltd. Mobile rack type battery box for UPS system
CN101212033A (zh) * 2006-12-25 2008-07-02 比亚迪股份有限公司 一种二次电池防爆壳体及电池
CN201087908Y (zh) * 2007-03-13 2008-07-16 东莞新能源电子科技有限公司 柱形锂电池结构
KR20140074151A (ko) * 2012-12-07 2014-06-17 타이코에이엠피(유) 전지모듈
CN204632881U (zh) * 2015-05-29 2015-09-09 深圳市昂佳科技有限公司 一种带有安全保护装置的锂聚合物电池
CN205429014U (zh) * 2015-12-31 2016-08-03 深圳市大富精工有限公司 一种电池及其电池壳
CN205429015U (zh) * 2015-12-31 2016-08-03 深圳市大富精工有限公司 电池及其电池壳

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112117480A (zh) * 2019-06-20 2020-12-22 南京德朔实业有限公司 电池包及采用该电池包的电动工具
CN113725529A (zh) * 2021-11-01 2021-11-30 中航锂电科技有限公司 一种电池及焊接方法
CN113725529B (zh) * 2021-11-01 2022-03-04 中航锂电科技有限公司 一种电池及焊接方法
WO2023173936A1 (zh) * 2022-03-15 2023-09-21 深圳市格瑞普电池有限公司 具有可兼容连接装置的电池充电系统

Also Published As

Publication number Publication date
CN107615511A (zh) 2018-01-19
CN107615511B (zh) 2021-01-22

Similar Documents

Publication Publication Date Title
CN205429014U (zh) 一种电池及其电池壳
WO2017113352A1 (zh) 一种电池
CN102136552B (zh) 电池保护装置、电池及电池保护装置的制作方法
JP5456952B2 (ja) 安全弁を備えた電池
WO2018028280A1 (zh) 一种具有过流保护功能的电池
CN111755633B (zh) 纽扣电池
CN214589035U (zh) 一种电池以及电子设备
CN205429015U (zh) 电池及其电池壳
JP2008041494A (ja) 電池セル及び電池パック構造
CN211088322U (zh) 一种锂电池结构
JP4860181B2 (ja) フィルム外装型電池
WO2017113413A1 (zh) 一种电池及其电池壳
CN107615510B (zh) 电池、电池壳以及电池壳焊接方法
CN214227087U (zh) 圆形极耳组件及扣式电池
CN219144400U (zh) 二次电池的壳体及二次电池
JP6246540B2 (ja) 非水電解質二次電池
CN216488387U (zh) 二次电池
CN205790078U (zh) 一种电池
CN213845440U (zh) 一种耐高温的锂电池防爆结构
CN113597701B (zh) 电化学装置以及电子装置
CN204348834U (zh) 一种锂电池
CN207282542U (zh) 一种新型安全柱式锂电池
KR102164973B1 (ko) 젤리-롤형 전극조립체를 포함하는 파우치형 이차전지
CN204348799U (zh) 一种新型锂电池
CN204348846U (zh) 一种高安全锂电池

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15911977

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15911977

Country of ref document: EP

Kind code of ref document: A1