WO2019114773A1 - 电流中断装置及其翻转件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车 - Google Patents

电流中断装置及其翻转件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车 Download PDF

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Publication number
WO2019114773A1
WO2019114773A1 PCT/CN2018/120764 CN2018120764W WO2019114773A1 WO 2019114773 A1 WO2019114773 A1 WO 2019114773A1 CN 2018120764 W CN2018120764 W CN 2018120764W WO 2019114773 A1 WO2019114773 A1 WO 2019114773A1
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WO
WIPO (PCT)
Prior art keywords
battery
electrode
score
flip member
flip
Prior art date
Application number
PCT/CN2018/120764
Other languages
English (en)
French (fr)
Inventor
蒋露霞
王飞飞
汤道毅
周江涛
朱建华
Original Assignee
比亚迪股份有限公司
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 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to KR1020207020235A priority Critical patent/KR102447727B1/ko
Priority to EP18887446.5A priority patent/EP3726619A4/en
Priority to JP2020532772A priority patent/JP7013582B2/ja
Priority to US16/771,625 priority patent/US11424519B2/en
Publication of WO2019114773A1 publication Critical patent/WO2019114773A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • 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
    • H01M50/147—Lids or covers
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/579—Devices or arrangements for the interruption of current in response to shock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 disclosure relates to the field of batteries, and relates to a current interrupting device and a flip member thereof, a battery cover assembly using the same, a battery using the battery cover assembly, and a battery module using the single battery.
  • the battery pack of the power battery may have a battery module composed of a plurality of single cells connected in series or in parallel.
  • the BMS Battery Management System
  • the state of charge is calculated. If there is a problem with the voltage sampling, it may cause the battery to overcharge.
  • the overcharge reaches a certain level, there is a danger of the battery burning and exploding.
  • the voltage and current of the battery are monitored, and the battery power is calculated by the current integration method and the open circuit voltage method, thereby controlling the charge and discharge of the battery.
  • the battery voltage sampling or current sampling failure, or software failure resulting in the battery not being controlled for a long time, especially in the case of charging with a charging post, when the charging pile fails to communicate with the battery manager, Charge can not be controlled, the battery overcharge to a certain extent, will cause the battery to rise or even explode.
  • An object of the present disclosure is to provide a current interrupting device and a flip member thereof, a battery cover assembly using the same, a battery using the battery cover assembly, and a battery module using the single battery , a power battery using the battery module and a vehicle using the power battery.
  • the present disclosure provides a flip member of a current interrupting device for electrically connecting to a scoring member, and the flip member is capable of acting under air pressure to break the scoring member a scoring, wherein the flip member is formed with a first connection region for electrical connection with the scoring member and a second connection region for electrically connecting to an electrode outer terminal of the battery, the flip member further A deformation buffer is formed, the deformation buffer being disposed between the first connection region and the second connection region, and disposed around the first connection region.
  • the inverting member is a sheet-like structure forming a taper shape, the small end of the taper being formed as the first connecting region, and the large end being formed as the second connecting portion away from the scoring member .
  • the deformation buffer is formed as an annular groove structure surrounding the first connection region.
  • the annular groove structure has a radial cross section that is curved or angled.
  • the present disclosure also provides a current interrupting device comprising a score member and a flip member, the flip member being the flip member provided by the disclosure, the flip member passing through the first connection region and the score plate Electrical connection.
  • the indentation member includes a scored region formed with the score, a first weld zone for electrically interconnecting the flip member, and a second weld zone for electrically connecting the terminal within the electrode
  • the second weld zone, the score zone, the first weld zone is arranged in a radial direction from the outside to the inside, and is formed from the outside to the inside as a step structure gradually approaching the flip member, the score surrounding the The first weld zone setting is described.
  • the scoring member is formed with a boss protruding from the scoring region, the first land is formed by the upper surface of the boss and parallel to the scoring region, and the The outer periphery of the upper surface is provided with a ring-shaped solder joint.
  • an outer circumference of the scored region is formed with a ring wall that is convexly protruding from the boss, and the second land is formed on an outer circumference of the ring wall and is nicked The regions are parallel, and the outer periphery of the second land is formed with a ring-shaped solder joint.
  • the present disclosure also provides a battery cover assembly including a cover plate, an electrode inner terminal located inside the cover plate, and an electrode outer terminal located outside the cover plate, wherein the electrode inner terminal and the electrode outer terminal pass the current interrupting device Electrically connected, the current interrupting device is a current interrupting device provided by the present disclosure, the electrode outer terminal is electrically connected to the inverting member, and the scoring member is electrically connected to the electrode inner terminal.
  • a support ring is sealingly connected between the lower side of the outer periphery of the inverting member and the cover plate, and an outer circumference of the electrode outer terminal is electrically connected to an upper side of the outer circumference of the inverting member.
  • an inner wall of the support ring is formed with a support flange, and an outer periphery of the flip member and the electrode outer terminal is supported on an upper surface of the support flange.
  • the present disclosure also provides a single battery comprising a housing, a battery core housed in the housing, and a battery cover assembly enclosing the housing, the battery cover assembly being a battery cover provided by the present disclosure An assembly, the electrode inner terminal is electrically connected to the battery core, and the inverting member is in gas communication with an interior of the outer casing.
  • the present disclosure also provides a battery module in which the unit battery provided by the present disclosure is disposed.
  • the present disclosure also provides a power battery including a package body and a battery module disposed in the package body, the battery module being the battery module of the disclosure.
  • the present disclosure also provides an electric vehicle provided with a power battery provided by the present disclosure.
  • the deflecting member since the deflecting member has a deformation buffer, the impact on the first connecting region can be buffered when an external force is received, thereby avoiding accidental breakage of the first connecting portion and the scoring on the scoring member, and reliability. high.
  • FIG. 1 is a partially exploded perspective view of a battery module in an exemplary embodiment of the present disclosure
  • FIG. 2 is a cross-sectional view of a current interrupting device in a first exemplary embodiment of the present disclosure
  • FIG 3 is a cross-sectional view of a current interrupting device in a second exemplary embodiment of the present disclosure.
  • FIG. 4 is a perspective structural view of a scoring member provided by the present disclosure based on a second exemplary embodiment
  • FIG. 5 is a schematic perspective structural view of a flip member according to a first exemplary embodiment of the present disclosure
  • FIG. 6 is a schematic cross-sectional view of a battery cover assembly based on a current interrupting device in a first embodiment of the present disclosure.
  • orientation words used such as “up, down, left, and right,” are generally defined on the basis of the direction of the drawing of the corresponding drawing, and "inside and outside” means Inside and outside of the contour of the corresponding part.
  • the present disclosure provides a current interrupting device, a scoring member, a flip member, a battery cover assembly using the same, and a single battery using the battery cover assembly.
  • a current interrupting device is disposed between the electrode outer terminal 112 and the corresponding electrode inner terminal for cutting off the circuit inside and outside the battery.
  • a plurality of single cells constitute a battery module by series or parallel connection, and can be placed in the battery pack to form a power battery.
  • various technical solutions provided in the present disclosure can be widely applied to other battery fields.
  • the present disclosure describes the current interrupting device involved by two embodiments. The various embodiments will be described in detail below with reference to the drawings.
  • each embodiment of the present disclosure provides a battery module including a plurality of single cells
  • the single battery may include a housing 111, a battery core housed in the housing, An electrode inner terminal 109 electrically connected to the battery core and a cover plate 110 of the package housing, wherein the electrode outer terminal 112 is disposed on the cover plate for performing input and output of current through the various electrode lead-out members 119.
  • the current interrupting device is disposed between the electrode outer terminal and the electrode inner terminal to control the input and output of the current of the electrode terminal. That is, in the normal state, the current interrupting device is in a state in which the battery cell is turned on.
  • the electrode terminal can normally perform current input and output to complete the charging and discharging work of the single battery, and in a dangerous state, for example, the battery has appeared.
  • the current interruption device can interrupt the current input of the electrode terminal, thereby avoiding problems such as overcharging of the battery. Therefore, as an important safety measure, the reliability of the current interrupt device is critical, that is, the current interrupt device is required to respond quickly.
  • the current interrupting devices in the various embodiments are all mechanical structures that sense air pressure.
  • the current interrupting devices are in gas communication with the interior of the outer casing of the unit cells and are capable of acting under air pressure to break through the flow.
  • Current In some embodiments, the transfer of current can be interrupted by disconnecting the internal components to shut off the charge and discharge of the battery in time.
  • the air pressure source used therein is: when the battery is in a dangerous state such as overcharging, gas is generated inside the battery, which causes the air pressure inside the outer casing to rise, or when the battery is abnormal during use, the battery temperature rises, The internal air pressure of the battery rises, thereby generating the pneumatic power that drives the current interrupting device.
  • the current interrupting device has a scoring member 101 and a flip member 102 connected to the scoring member 101 to be electrically connected to each other, and the flip member 102 and the electrode inner terminal 109 can disconnect the electrical connection under the action of air pressure.
  • the disconnection of the self structure may be achieved by disconnecting at least one of the two, for example by machining a weak score on the corresponding component, thereby achieving disconnection of the electrical connection,
  • a score 104 is formed on the score member 101. That is, under the action of the internal air pressure, the indentation 104 can be broken by the inversion operation of the inverting member 102 to achieve the disconnection of the electrical connection, thereby achieving the purpose of cutting off the current.
  • the scoring member 101 and the flip member 102 in the two embodiments of the present disclosure will be described below with reference to FIGS. 2 and 3.
  • the present disclosure provides a scoring member for a current interrupting device, the scoring member 101 including a scored region 105 formed with a score 104 for electrically interconnecting the flip member 102. a first land 103, and a second land 107 for electrically connecting to the electrode internal terminal 109, the flip member 102 is capable of acting under the action of air pressure to electrically disconnect the scoring member 101 by breaking the score 104, After the flip member 102 breaks the score 104, the flip member 102 is electrically disconnected from the second land 107, thereby being electrically disconnected from the electrode terminal 109.
  • the score 104 surrounds the first land.
  • the score 104 may be an annular shape surrounding the first weld zone 103, and the score 104 is disposed at least one of the first weld zone 103 and the second weld zone 107. That is, the plane in which the score 104 is located and at least one of the first land 103 and the second land 107 are not in one plane, which can effectively eliminate the external force transmitted by the flip member 101 to the score on the score member 101.
  • the mechanical impact of 104, and also the thermal impact of the weld stress of the weld zone on the area of the score 104 can be eliminated. Thereby the reliability of the current interrupting device provided by the present disclosure is improved.
  • the score 104 surrounding the first land 103 can be broken by the internal air pressure of the battery, and the electrical connection between the flip member 102 and the score member 101 is broken as a whole to interrupt the current.
  • the score 104 is simultaneously disposed differently from the first land 103 and the second land 107.
  • the second land 107 is engraved.
  • the mark region 105, the first land 103 is arranged in the radial direction from the outside to the inside, and is formed from the outside to the inside to gradually approach the step structure of the flip member 102, and the second land 107 is also different from the score region 105, and the three
  • the step structure formed has a buffering function, which can avoid the thermal influence of the welding stress of the two weld zones on the score 104, and can also buffer the external force transmitted from the terminal direction of the electrode, making the current interruption device more reliable.
  • the score member 101 includes a boss 106 projecting from the score region 105, and the first land 103 is formed at On the boss 106, a score 104 formed on the scored area 105 is disposed around the boss 106.
  • the first land 103 is formed by the upper surface of the boss 106 and parallel to the scored region 105, and the outer periphery of the upper surface is provided with a ring-shaped solder joint .
  • the first connection region 115 on the flip member 102 may be formed to receive the connection hole of the boss 106.
  • the boss may be a cylindrical structure or a through hole structure in the axial direction of the cylindrical structure; in other embodiments, the different surfaces of the two regions may be realized by various convex or concave structures. .
  • the top end of the electrode inner terminal 109 is provided with a receiving groove.
  • the outer peripheral edge of the scored area 105 is formed with a boss.
  • the annular wall 108, the upper edge of the annular wall 108 is aligned with the upper edge of the boss 106 in the height direction, wherein the second land 107 is formed on the outer periphery of the ring wall 108 and is adjacent to the upper edge of the boss Aligned in the height direction, that is, the upper edge of the outer wall of the ring wall is for electrically connecting with the electrode inner terminal 109 of the battery to form a second land, which is shaped to match the groove wall of the receiving groove of the electrode inner terminal 109 and passes through the ring-shaped solder joint Welding is performed, and in this embodiment, the score member 101 can be completely accommodated in the receiving groove of the electrode inner terminal 109, and the structure is stabilized. That is, in the first embodiment, the first land 103 and the second land 107 are coplanar and simultaneously face the scored region 105.
  • a receiving groove is still provided in the electrode inner terminal 109, and the boss 106 of the scoring member 101 extends out of the receiving groove.
  • the scoring area 105 The outer circumference is formed with a ring wall 108 projecting downwardly from the boss 106, and a second land 107 is formed on the outer circumference of the ring wall 108 and parallel to the scored area 105, so that the score member 101 is formed as the step structure described above.
  • the outer periphery of the second land 107 is formed with an annular solder joint for electrical connection with the electrode inner terminal 109 of the battery, and in some embodiments, the lower surface of the second land 107 may be placed on the bottom wall of the receiving groove The outer peripheral edge is welded to the side wall of the receiving groove by a ring-shaped solder joint, and the structure is also stable. That is, in the second embodiment, the first land 103, the scored region 105, and the second land 107 are disposed differently.
  • the side walls of the boss and the ring wall 108 are respectively perpendicular to the scored area 105, and may be angled in other embodiments, for example, forming a zigzag type step.
  • the first lands 103, the nicks 105, and the second lands 107 may each have an annular structure, that is, the first lands 103 have a central hole. In other embodiments, the first lands 103 may not have Center hole.
  • the scoring member 101 of the two embodiments has been described above, and the flip member 102 of the two embodiments will be described below.
  • the flip member 102 is formed with a first connection region 115 for electrically connecting with the scoring member 101 and a second connection region 116 for electrically connecting to the electrode outer terminal 112 of the battery.
  • a deformation buffer 117 is further formed on the flip member 102.
  • the deformation buffer 117 is disposed between the first connection region 115 and the second connection region 116, and is disposed around the first connection region 115. .
  • the deformation buffer means that the area can be deformed prior to the flip member 102 itself, the first connection region 115, the second connection region 116, and the score member 101 by an external force, thereby buffering the external force. The impact of the external force on the first joint zone 115 and the score 104 on the score member 101 is then mitigated, increasing the reliability of the current interrupting device.
  • the flipping member 102 is a sheet-like structure forming a taper shape, the small end of the taper is formed as a first connecting region 115, the big end is away from the scoring member 101 and formed as a second Connection area 116.
  • the tapered structure can dispose the first connection region 115 and the second connection region 116 differently, and can provide a space for the flip member 102 to be upwardly turned up to break the score 104.
  • the flip member may also be a flat member having elasticity or the like.
  • the deformation buffer 117 in the present disclosure is formed as an annular groove structure surrounding the first connection region 115.
  • the deformation buffer can be achieved by the relative movement between the groove walls of the annular groove.
  • the deformation buffer 117 can also be realized by a structure such as a deformation chamber or an elastic material.
  • the annular groove structure has an arcuate cross section, for example, a semicircular shape that protrudes toward the electrode outer terminal 112.
  • the external force transmitted from the second connection region 116 can be absorbed by the deformation of the arcuate groove wall, which in turn reduces the impact on the first connection region 115 and the score member 101.
  • the cross section of the annular groove can also be angular, that is, the cross section has two angled sides, which can also serve as a buffer.
  • the boss 106 of the score member 101 protrudes from the receiving groove of the terminal inside the electrode.
  • a support ring 113 is sealingly connected between the lower side of the outer periphery of the flip member 102 and the cover plate 110,
  • the outer peripheral edge of the electrode outer terminal 112 is electrically connected to the upper side of the outer peripheral edge of the flip member 102, so that gas generated from the inside of the battery can act on the flip member 102 without leaking.
  • the electrode outer terminal 112 is formed into a cap structure and may be formed with a through hole 118 for discharging gas when the flipper 102 is actuated, thereby avoiding the reverse flipper action under the action of air pressure.
  • the support ring 113 may be supported by an insulating material or a conductive material.
  • the support ring 113 can be a ceramic ring to insulate the cover plate 110 from being charged.
  • the inner wall of the support ring 113 is formed with a support flange 114, and the outer periphery of the flip member 102 and the electrode outer terminal 112 are supported on the upper surface of the support flange 114 to ensure stable operation of the current interrupting device.
  • the current interrupting device includes the above-described scoring member 101 and the above-described inverting member 102, and the scoring member 101 is electrically connected to the flip member 102 through the first land 103 and the flip member 102.
  • the battery cover assembly provided by the present disclosure, as shown in FIG. 6, includes a cover plate 110, an electrode inner terminal 109 located inside the cover plate 110, and an electrode outer terminal 112 located outside the cover plate 110, an electrode inner terminal 109 and an electrode
  • the outer terminal 112 is electrically connected by the above-described current interrupting means, the electrode outer terminal 112 is electrically connected to the flip member 102, and the score member 101 is electrically connected to the electrode inner terminal 109.
  • the inner electrode of the electrode is soldered to the inner lead-out member 120 electrically connected to the battery core.
  • the inner lead-out member 120 can be formed with a soldering hole.
  • the inner electrode terminal 109 is formed into a columnar structure and embedded in the soldering hole to be led out.
  • Piece 120 is welded.
  • a cover insulating member 122 is disposed between the cover plate 110 and the inner lead-out member 102, and the inner terminal of the electrode may pass through the cover insulating member with a gap to be welded with the scoring member 101, and To ensure the tightness, the lower end of the support ring 113 is welded to the cover plate, wherein ceramic is used as the material to ensure the insulation of the current interrupting device and the cover plate 110, and a hole is formed in the cover plate to facilitate the installation of the current interrupting device.
  • the inner lead member 120 is formed with a gas hole 121 through which the gas can be applied to the flip member 102.
  • the unit cell provided by the present disclosure includes a housing 111, a battery core housed in the housing, and the above-described battery cover assembly of the package housing, the electrode inner terminal 109 is electrically connected to the battery core, and the inner gas of the flip member 102 and the outer casing Connected.
  • An inverting member of a current interrupting device the inverting member 102 is for electrically connecting with the scoring member 101, and the inverting member 102 is capable of acting under the action of air pressure to break the scoring on the scoring member 101 104.
  • the flip member 102 can be electrically disconnected from the electrode inner terminal 109 after the score 104 is broken.
  • the flip member 102 is formed with a first connection region 115 for electrically connecting with the scoring member 101.
  • a second connection region 116 for electrically connecting to the electrode outer terminal 112 of the battery wherein the flip member 102 is further formed with a deformation buffer 117, and the deformation buffer 117 is disposed at the first connection region 115 and Between the second connection regions 116 and disposed around the first connection region 115.
  • the flip member 102 is a tapered sheet-like structure, the tapered small end is formed as the first connection region 115, and the large end is formed as the second portion away from the score member. Connection area 116.
  • the deformation buffer 117 is formed as an annular groove structure surrounding the first connection region 115.
  • the annular groove structure has a radial cross section that is curved or angled.
  • a current interruption device comprising a score member 101 and a flip member 102, the flip member 102 being the flip member 102 of any one of the above, the flip member 102 passing through the first connection region 115 and the engraving
  • the trace 101 is electrically connected.
  • the score member 101 includes a scored region 105 formed with the score 104, a first land 103 for electrically interconnecting the flip member 102, and a terminal 109 for electrical connection with the electrode Connected second lands 107, the second lands 107, the nicks 105, the first lands 103 are arranged radially from the outside to the inside, and are formed from the outside to the inside to gradually approach the flipper
  • the stepped structure of 102 is disposed around the first land 103.
  • the scoring member 101 is formed with a boss 106 protruding from the scoring region 105, and the first land 103 is formed by the upper surface of the boss 106 and the scoring The zones are parallel and the outer periphery of the upper surface is provided with a ring-shaped solder joint.
  • the outer periphery of the scored region 105 is formed with a ring wall 108 that projects downwardly from the boss, and the second land 107 is formed on the outer periphery of the ring wall 108 and The scored regions 105 are parallel, and the outer periphery of the second land 107 is formed with a ring-shaped solder joint.
  • a battery cover assembly includes a cover plate 110, an electrode inner terminal 109 located inside the cover plate 110, and an electrode outer terminal 112 located outside the cover plate 110, and the electrode inner terminal 109 and the electrode outer terminal 112 pass
  • the current interrupting device is electrically connected, the current interrupting device is any one of the above-mentioned current interrupting devices, the electrode outer terminal 112 is electrically connected to the flipping member 102, and the scoring member 101 is electrically connected to the electrode On the inner terminal 109.
  • a support ring 113 is sealingly connected between the lower side of the outer periphery of the flip member 102 and the cover plate 110, and the outer periphery of the electrode outer terminal 112 is electrically connected to the outer periphery of the flip member 102.
  • the upper side of the edge is sealingly connected between the lower side of the outer periphery of the flip member 102 and the cover plate 110, and the outer periphery of the electrode outer terminal 112 is electrically connected to the outer periphery of the flip member 102. The upper side of the edge.
  • the inner wall of the support ring 113 is formed with a support flange 114, and the outer periphery of the flip member 102 and the electrode outer terminal 112 is supported on the upper surface of the support flange 114.
  • a single battery comprising a housing 111, a battery core housed in the housing, and a battery cover assembly enclosing the housing, the battery cover assembly being the battery cover of any of the above
  • the electrode inner terminal 109 is electrically connected to the battery cell
  • the flip member 102 is in gas communication with the interior of the outer casing.
  • the battery module provided by the present disclosure is provided with the above-mentioned single battery.
  • the power battery provided by the present disclosure includes a package body and the above-mentioned battery module disposed in the package body.
  • the electric vehicle provided by the present disclosure is provided with the above-described power battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

一种电流中断装置及其翻转件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车。该翻转件用于与刻痕件相互电连接，并且所述翻转件能够在气压作用下动作以通过拉断所述刻痕件上的刻痕而与所述刻痕件断开电连接，其中，所述翻转件上形成有用于与所述刻痕件电连接的第一连接区和用于与电池的电极外端子电连接的第二连接区，所述翻转件上还形成有变形缓冲区，所述变形缓冲区设置在所述第一连接区和所述第二连接区之间，并且围绕所述第一连接区设置。

Description

电流中断装置及其翻转件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车
相关申请的交叉引用
本申请要求比亚迪股份有限公司于2017年12月13日提交的、发明名称为“电流中断装置及其翻转件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车”的中国专利申请号“201711330221.5”的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及电池领域，涉及一种电流中断装置及其翻转件、使用该电流中断装置的电池盖板组件，使用该电池盖板组件的单体电池，使用该单体电池的电池模组，使用该电池模组的动力电池和使用该动力电池的车辆。
背景技术
电池作为储能单元在各行各业均有重要作用，例如动力电池广泛用于新能源汽车等领域，其中动力电池的电池包内可以具有由多个单体电池相互串联或并联组成的电池模组以实现充放电的工作。其中，动力电池在充放电过程中，通常通过BMS(电池管理系统)监控电压和电流的变化并计算荷电状态。如果电压采样出现问题，就可能导致电池过充，特别是对于三元体系来说，如过充达到一定程度更会出现电池燃烧爆炸的危险。
相关技术中，对电池的电压和电流的进行监测，通过电流积分法和开路电压法计算电池电量，并以此控制电池的充放电。但是也存在不足，例如电池电压采样或者电流采样失效，或者软件失效，导致电池长时间充电得不到控制，特别是在使用充电桩充电的情况下，充电桩与电池管理器通讯失效时，过充无法控制，电池过充到一定程度，会引起电池鼓涨甚至爆炸起火。
因此，提供一种能够自身能够强制断开的电流中断技术具有积极意义。
发明内容
本公开的目的是提供一种涉及一种电流中断装置及其翻转件、使用该电流中断装置的电池盖板组件，使用该电池盖板组件的单体电池，使用该单体电池的电池模组，使用该电池模组的动力电池和使用该动力电池的车辆。
为了实现上述目的，本公开提供一种电流中断装置的翻转件，该翻转件用于与刻痕件相互电连接，并且所述翻转件能够在气压作用下动作以拉断所述刻痕件上的刻痕，其中，所述翻转件上形成有用于与所述刻痕件电连接的第一连接区和用于与电池的电极外端子电 连接的第二连接区，所述翻转件上还形成有变形缓冲区，所述变形缓冲区设置在所述第一连接区和所述第二连接区之间，并且围绕所述第一连接区设置。
在一些实施例中，所述翻转件为形成锥形的片状结构，该锥形的小端形成为所述第一连接区，大端远离所述刻痕件形成为所述第二连接区。
在一些实施例中，所述变形缓冲区形成为围绕所述第一连接区的环形槽结构。
在一些实施例中，所述环形槽结构的径向截面为弧形或角型。
本公开还提供一种电流中断装置，包括刻痕件和翻转件，所述翻转件为本公开提供的所述的翻转件，所述翻转件通过所述第一连接区与所述刻痕片电连接。
在一些实施例中，所述刻痕件包括形成有所述刻痕的刻痕区、用于与翻转件相互电连接的第一焊接区以及用于与电极内端子电连接的第二焊接区，所述第二焊接区、所述刻痕区所述第一焊接区沿径向从外向内依次布置，并且从外向内形成为逐渐接近所述翻转件的台阶结构，所述刻痕围绕所述第一焊接区设置。
在一些实施例中，所述刻痕件上形成有从该刻痕区凸出的凸台，所述第一焊接区由所述凸台上表面形成并与所述刻痕区平行，并且该上表面的外周缘设置有环形焊点。
在一些实施例中，所述刻痕区的外周缘形成有与所述凸台反向凸出的环壁，所述第二焊接区形成在所述环壁的外周缘并与所述刻痕区平行，所述第二焊接区的外周缘形成有环形焊点。
本公开还提供一种电池盖板组件，包括盖板、位于该盖板内侧的电极内端子和位于该盖板外侧的电极外端子，所述电极内端子和所述电极外端子通过电流中断装置电连接，所述电流中断装置为本公开提供的电流中断装置，所述电极外端子与所述翻转件电连接，所述刻痕件电连接在所述电极内端子上。
在一些实施例中，所述翻转件的外周缘下侧与所述盖板之间密封连接有支撑环，所述电极外端子的外周缘电连接在所述翻转件的外周缘上侧。
在一些实施例中，所述支撑环的内壁形成有支撑凸缘，所述翻转件和所述电极外端子的外周缘支撑在所述支撑凸缘的上表面。
本公开还提供一种单体电池，该单体电池包括外壳、容纳在外壳内的电芯、以及封装所述外壳的电池盖板组件，所述电池盖板组件为本公开提供的电池盖板组件，所述电极内端子与所述电芯电连接，并且所述翻转件与所述外壳的内部气体连通。
本公开还提供一种电池模组，该电池模组内设置有本公开提供的单体电池。
本公开还提供一种动力电池，包括包体和设置在该包体内的电池模组，所述电池模组为本公开体的电池模组。
本公开还提供一种电动汽车，该电动汽车设置有本公开提供的动力电池。
通过上述技术方案，由于翻转件上具有变形缓冲区，在收到外力冲击时能够缓冲对第一连接区的冲击，从而避免第一连接区处以及刻痕件上刻痕的意外断裂，可靠性高。
本公开的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本公开的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本公开，但并不构成对本公开的限制。在附图中：
图1是本公开示例性实施方式中电池模组的部分分解立体示意图；
图2是本公开第一示例性实施方式中电流中断装置的剖视图；
图3是本公开第二示例性实施方式中电流中断装置的剖视图。
图4是本公开基于第二示例性实施方式提供的一种刻痕件的立体结构示意图；
图5是本公开基于第一示例性实施方式提供的翻转件的立体结构示意图；
图6是基于本公开第一实施方式中电流中断装置的电池盖板组件的剖视示意图。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本公开，并不用于限制本公开。
在本公开中，在未作相反说明的情况下，使用的方位词如“上、下、左、右”通常是以相应附图的图面方向为基准定义的，“内、外”是指相应部件轮廓的内和外。
如图1至图6所示，本公开提供了一种电流中断装置及其刻痕件、翻转件、使用该电流中断装置的电池盖板组件，使用该电池盖板组件的单体电池，使用该单体电池的电池模组，使用该电池模组的动力电池和使用该动力电池的车辆的技术方案。其中如图1所示，电流中断装置设置在电极外端子112和对应的电极内端子之间以用于切断电池内外的电路。其中，在单体电池中，多个单体电池通过串联或并联组成电池模组，并可以置入电池包内而形成动力电池。此外，除动力电池领域外，本公开中提供的各种技术方案还可以广泛应用于其他的电池领域中。本公开通过两个实施方式介绍所涉及的电流中断装置。下面将结合附图对各个实施方式进行详细描述。
首先，如图1和图2所示，本公开各实施方式中均提供一种电池模组，包括多个单体电池，其中，单体电池可以包括外壳111、容纳在外壳内的电芯、与该电芯电连接的电极内端子109以及封装外壳的盖板110，其中电极外端子112设置在盖板上，以用于通过各种电极引出件119完成电流的输入和输出。电流中断装置设置在电极外端子与电极内端子之间以控制电极端子的电流的输入和输出。即电流中断装置在常规状态下，电芯为导通的 状态，此时电极端子可以正常进行电流的输入和输出，以完成单体电池的充放电工作，而在危险状态下，例如电池出现过充时，电流中断装置可以中断电极端子的电流输入，从而避免电池出现过充等问题。因此，作为重要的安全措施，电流中断装置的可靠性至关重要，即需要电流中断装置可以快速响应。
在本公开中，各实施方式中的电流中断装置均为感应气压的机械结构，在一些实施例中，电流中断装置与单体电池的外壳内部气体连通并能够在气压下作用断开流经的电流。在一些实施例中，可以通过断开内部的部件连接来中断电流的传递，从而及时切断电池的充放电。其中所利用的气压来源为：当电池出现过充等危险状态时，电池内部会产生气体继而使得外壳内部的气压升高，或者当电池在使用过程中出现异常导致电池温度升高时，会使得电池内部气压升高，从而产生驱动电流中断装置的气压动力。
以如图2至图3的所述的实施方式为例，该电流中断装置具有刻痕件101和与该刻痕件101相连以相互电连接的翻转件102，并且翻转件102与电极内端子109能够在气压作用下断开电连接。在本公开的实施方式中，可以为将二者中至少一个的本身断开，例如通过在相应部件上加工出薄弱的刻痕来实现本身结构的断开，从而实现电连接的断开，在一些实施例中在刻痕件101上形成有刻痕104。即，在内部的气压作用下，通过翻转件102的翻转动作可以拉断刻痕104而实现二者电连接的断开，从而实现切断电流的传递的目的。
之所以采用这种方式，是考虑由于在动力电池的领域中，需要通过的电流较大，因此需要保证刻痕件201和翻转件202的焊接结构稳定，避免大电流熔断焊接结构。这样通过刻痕件101的刻痕104的设置，即在相应部分加工出强度小于其他区域的薄弱部，就可以完成刻痕件101和翻转件102的完全断开，刻痕通常为围绕刻痕件和翻转件的焊接区设置，以保证二者的完全断开。
下面结合图2和图3介绍本公开两种实施方式中的刻痕件101和翻转件102。
如图2和图3所示，本公开提供一种电流中断装置的刻痕件，该刻痕件101上包括形成有刻痕104的刻痕区105，用于与翻转件102相互电连接的第一焊接区103，以及用于与电极内端子109电连接的第二焊接区107，翻转件102能够在气压作用下动作以通过拉断刻痕104而与刻痕件101断开电连接，翻转件102拉断刻痕104后，翻转件102与第二焊接区107断开电连接，进而与电极内端子109断开电连接,其中，在本公开中，刻痕104围绕第一焊接区103设置，刻痕104可以为环绕第一焊接区103的环形，并且刻痕104与该第一焊接区103、第二焊接区107中的至少一个异面设置。即，刻痕104所在的平面和第一焊接区103和第二焊接区107中的至少一者不在一个平面，这样能够有效消除由翻转件101传递来的外力对刻痕件101上的刻痕104的机械冲击，并且还能够消除焊接区的焊接应力对刻痕104所在区域的热影响。从而提升本公开提供的电流中断装置的可靠性。而围 绕第一焊接区103的刻痕104在电池内部气压的作用下可以断开，此时将整体断开翻转件102和刻痕件101的电连接而起到电流中断的作用。
如图3和图4所示，在第二实施方式中，刻痕104同时与第一焊接区103和第二焊接区107均异面设置，在一些实施例中，第二焊接区107、刻痕区105，第一焊接区103沿径向从外向内依次布置，并且从外向内形成为逐渐接近翻转件102的台阶结构，第二焊接区107也与刻痕区105异面，并且三者构成的台阶结构具有缓冲作用，能够避免两个焊接区的焊接应力对刻痕104的热影响，也能够缓冲从电极内端子方向传递来的外力，使得电流中断装置更加可靠。
在一些实施例中，在本公开的两个实施方式中，如图2或图3所示，刻痕件101包括从该刻痕区105凸出的凸台106，第一焊接区103形成在凸台106上，形成在刻痕区105上的刻痕104围绕凸台106设置。从而实现二者的所在区域的异面，在一些实施例中，第一焊接区103由凸台106的上表面形成并与刻痕区105平行，并且该上表面的外周缘设置有环形焊点。对应地，翻转件102上的第一连接区115可以形成为容纳该凸台106的连接孔。从而通过环形焊点将凸台的外周缘和连接孔的内壁牢固焊接。其中凸台可以为圆柱状结构，也可以在圆柱状结构的轴向方向具有通孔结构；在其他实施方式中，还可以通过各种凸起或凹入的结构实现二者区域的异面设置。
如图2所示，在第一实施方式中，为了和电池的电极内端子109电连接，通常电极内端子109的顶端设置容纳槽，为此，刻痕区105的外周缘形成有与凸台同向凸出的环壁108，环壁108的上边缘与凸台106的上边缘在高度方向上对齐，其中第二焊接区107形成在环壁108的外周缘并与凸台的上边缘在高度方向上对齐，即该环壁的外壁的上边缘用于与电池的电极内端子109电连接以形成第二焊接区，与电极内端子109的容纳槽的槽壁形状配合并且通过环形焊点进行焊接，并且在这种实施方式中，刻痕件101可以完全容纳进入电极内端子109的容纳槽中，结构稳固。即，第一实施方式中，第一焊接区103和第二焊接区107共面，并同时和刻痕区105异面。
如图3所示，在第二实施方式中，电极内端子109上仍然设置容纳槽，而刻痕件101的凸台106则伸出该容纳槽，在一些实施例中，刻痕区105的外周缘形成有与凸台106反向凸出的环壁108，第二焊接区107形成在环壁108的外周缘并与刻痕区105平行，以使得刻痕件101形成为上述的台阶结构，其中第二焊接区107的外周缘形成有用于与电池的电极内端子109电连接的环形焊点，在一些实施例中，第二焊接区107的下表面可以放置于容纳槽的底壁上，而外周缘与容纳槽的侧壁通过环形焊点焊接，同样结构稳固。即，第二实施方式中，第一焊接区103，刻痕区105和第二焊接区107均异面设置。
其中在第二实施方式中，如图3所示，凸台的侧壁和环壁108分别与刻痕区105垂直， 在其他实施方式还可以具有一定角度，例如形成Z字型台阶。此外，第一焊接区103、刻痕区105和第二焊接区107可以分别为环状结构，即第一焊接区103具有中心孔，在其他实施方式中，第一焊接区103也可以不具有中心孔。
上述介绍了两种实施方式中的刻痕件101，下面介绍两种实施方式中的翻转件102。
其中，如图2至图5所示，翻转件102上形成有用于与刻痕件101电连接的第一连接区115和用于与电池的电极外端子112电连接的第二连接区116，如图2和图5所示，此外翻转件102上还形成有变形缓冲区117，变形缓冲区117设置在第一连接区115和第二连接区116之间，并且围绕第一连接区115设置。其中变形缓冲区是指在外力作用下该区域可以先于翻转件102本身、第一连接区115、第二连接区116以及刻痕件101本身进行变形，从而缓冲该外力。继而减缓外力对于第一连接区115、以及刻痕件101上刻痕104的冲击，提升电流中断装置的可靠性。
其中，在本公开的两种实施方式中，翻转件102为形成锥形的片状结构，该锥形的小端形成为第一连接区115，大端远离刻痕件101并形成为第二连接区116。该锥形结构可以将第一连接区115和第二连接区116异面设置，并且能够提供翻转件102受力向上翻转的空间，以拉断刻痕104。在其他可能的实施方式中，翻转件还可以为具有弹性的平面件等。
如图2和图5所示，本公开中的变形缓冲区117形成为围绕第一连接区115的环形槽结构。这样在外力作用下，通过环形槽的槽壁之间的相对运动能够实现变形缓冲的作用。在其他可能的实施方式中，变形缓冲区117还可以通过变形腔室等结构或弹性材料实现。
如图2和图5所示，在第一实施方式中，环形槽结构的径向截面为弧形，例如朝向电极外端子112凸出的半圆形。这样，从第二连接区116传动来的外力可以通过弧形的槽壁的变形来吸收，继而减少对第一连接区115和刻痕件101的冲击。在其他可能的实施方式中，环形槽的截面还可以角型，即截面具有两个呈角度的边，同样可以起到缓冲作用。
如图3所示，在第二实施方式中，在第二实施方式中刻痕件101的凸台106凸出于电极内端子的容纳槽。
如图2和图3所示，在本公开的两个实施方式中，为了保证能够被电池内部的气体作用，翻转件102的外周缘下侧与盖板110之间密封连接有支撑环113，电极外端子112的外周缘电连接在翻转件102的外周缘上侧，这样从电池内部产生的气体可以作用在翻转件102上而不会外泄。而为了能够使得翻转件102正常动作，电极外端子112形成为盖帽结构并且可以形成有通孔118，以用于在翻转件102动作时排出气体，从而避免在气压作用下反正翻转件动作。另外在盖板110带电和绝缘两种实施方式中，支撑环113可以选择绝缘材料或者导电材料支撑。通常地，支撑环113可以为陶瓷环以使得盖板110绝缘而不带电。在一些实施例中，支撑环113的内壁形成有支撑凸缘114，翻转件102和电极外端子 112的外周缘支撑在支撑凸缘114的上表面，以保证电流中断装置的稳定工作。
本公开提供的电流中断装置，包括上述的刻痕件101和上述的翻转件102，刻痕件101通过第一焊接区103与翻转件102相互电连接。
本公开提供的电池盖板组件，如图6所示，包括盖板110、位于该盖板110内侧的电极内端子109和位于该盖板110外侧的电极外端子112，电极内端子109和电极外端子112通过上述的电流中断装置电连接，电极外端子112与翻转件102电连接，刻痕件101电连接在电极内端子109上。
其中电极内端子和与电芯电连接的内引出件120焊接，在一些实施例中内引出件120上可以形成焊孔，电极内端子109形成为柱状结构并嵌入该焊孔中以与内引出件120焊接。其中为了避免盖板110带电，盖板110和内引出件102之间设置有盖板绝缘件122，电极内端子可以有间隙地穿过该盖板绝缘件以与刻痕件101焊接，另外为了保证密封性，支撑环113的下端焊接在盖板上，其中可以选用陶瓷作为材料，以保证电流中断装置和盖板110的绝缘，盖板上则形成有孔道，以便于电流中断装置的安装。另外为了保证电池内部的气体能够作用到翻转件102上，内引出件120上形成有气孔121，从而使得气体能够通过该气孔121作用到翻转件102上。
本公开提供的单体电池，包括外壳111、容纳在外壳内的电芯、以及封装外壳的上述的电池盖板组件，电极内端子109与电芯电连接，并且翻转件102与外壳的内部气体连通。一种电流中断装置的翻转件，所述翻转件102用于与刻痕件101相互电连接，并且所述翻转件102能够在气压作用下动作以拉断所述刻痕件101上的刻痕104，所述翻转件102拉断刻痕104后可以与电极内端子109断开电连接，其中，所述翻转件102上形成有用于与所述刻痕件101电连接的第一连接区115和用于与电池的电极外端子112电连接的第二连接区116，所述翻转件102上还形成有变形缓冲区117，所述变形缓冲区117设置在所述第一连接区115和所述第二连接区116之间，并且围绕所述第一连接区115设置。
在一些实施例中，所述翻转件102为形成锥形的片状结构，该锥形的小端形成为所述第一连接区115，大端远离所述刻痕件形成为所述第二连接区116。
在一些实施例中，所述变形缓冲区117形成为围绕所述第一连接区115的环形槽结构。
在一些实施例中，所述环形槽结构的径向截面为弧形或角型。
一种电流中断装置，包括刻痕件101和翻转件102，所述翻转件102为上述任一种所述的翻转件102，所述翻转件102通过所述第一连接区115与所述刻痕片101电连接。
在一些实施例中，所述刻痕件101包括形成有所述刻痕104的刻痕区105、用于与翻转件102相互电连接的第一焊接区103以及用于与电极内端子109电连接的第二焊接区107，所述第二焊接区107、所述刻痕区105所述第一焊接区103沿径向从外向内依次布置，并 且从外向内形成为逐渐接近所述翻转件102的台阶结构，所述刻痕104围绕所述第一焊接区103设置。
在一些实施例中，所述刻痕件101上形成有从该刻痕区105凸出的凸台106，所述第一焊接区103由所述凸台106上表面形成并与所述刻痕区平行，并且该上表面的外周缘设置有环形焊点。
在一些实施例中，所述刻痕区105的外周缘形成有与所述凸台反向凸出的环壁108，所述第二焊接区107形成在所述环壁108的外周缘并与所述刻痕区105平行，所述第二焊接区107的外周缘形成有环形焊点。
一种电池盖板组件，包括盖板110、位于该盖板110内侧的电极内端子109和位于该盖板110外侧的电极外端子112，所述电极内端子109和所述电极外端子112通过电流中断装置电连接，所述电流中断装置为上述任一种所述的电流中断装置，所述电极外端子112与所述翻转件102电连接，所述刻痕件101电连接在所述电极内端子109上。
在一些实施例中，所述翻转件102的外周缘下侧与所述盖板110之间密封连接有支撑环113，所述电极外端子112的外周缘电连接在所述翻转件102的外周缘上侧。
在一些实施例中，所述支撑环113的内壁形成有支撑凸缘114，所述翻转件102和所述电极外端子112的外周缘支撑在所述支撑凸缘114的上表面。
一种单体电池，该单体电池包括外壳111、容纳在外壳内的电芯、以及封装所述外壳的电池盖板组件，所述电池盖板组件为上述任一种所述的电池盖板组件，所述电极内端子109与所述电芯电连接，并且所述翻转件102与所述外壳的内部气体连通。
本公开提供的电池模组，该电池模组内设置有上述的单体电池。
本公开提供的动力电池，包括包体和设置在该包体内的上述的电池模组。
本公开提供的电动汽车，该电动汽车设置有上述的动力电池。
以上结合附图详细描述了本公开的五种实施方式，但是，本公开并不限于上述实施方式中的具体细节，在本公开的技术构思范围内，可以对本公开的技术方案进行多种简单变型，这些简单变型均属于本公开的保护范围。
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合，为了避免不必要的重复，本公开对各种可能的组合方式不再另行说明。
此外，本公开的各种不同的实施方式之间也可以进行任意组合，只要其不违背本公开的思想，其同样应当视为本公开所公开的内容。

Claims (15)

  1. 一种电流中断装置的翻转件，其特征在于，所述翻转件(102)用于与刻痕件(101)相互电连接，并且所述翻转件(102)能够在气压作用下动作以拉断所述刻痕件(101)上的刻痕(104)，其中，所述翻转件(102)上形成有用于与所述刻痕件(101)电连接的第一连接区(115)和用于与电池的电极外端子(112)电连接的第二连接区(116)，所述翻转件(102)上还形成有变形缓冲区(117)，所述变形缓冲区(117)设置在所述第一连接区(115)和所述第二连接区(116)之间，并且围绕所述第一连接区(115)设置。
  2. 根据权利要求1所述的翻转件，其特征在于，所述翻转件(102)为形成锥形的片状结构，该锥形的小端形成为所述第一连接区(115)，大端远离所述刻痕件形成为所述第二连接区(116)。
  3. 根据权利要求1或2所述的翻转件，其特征在于，所述变形缓冲区(117)形成为围绕所述第一连接区(115)的环形槽结构。
  4. 根据权利要求3所述的翻转件，其特征在于，所述环形槽结构的径向截面为弧形或角型。
  5. 一种电流中断装置，包括刻痕件(101)和翻转件(102)，其特征在于，所述翻转件(102)为根据权利要求1-4中任意一项所述的翻转件(102)，所述翻转件(102)通过所述第一连接区(115)与所述刻痕片(101)电连接。
  6. 根据权利要求5所述的电流中断装置，其特征在于，所述刻痕件(101)包括形成有所述刻痕(104)的刻痕区(105)、用于与翻转件(102)相互电连接的第一焊接区(103)以及用于与电极内端子(109)电连接的第二焊接区(107)，所述第二焊接区(107)、所述刻痕区(105)所述第一焊接区(103)沿径向从外向内依次布置，并且从外向内形成为逐渐接近所述翻转件(102)的台阶结构，所述刻痕(104)围绕所述第一焊接区(103)设置。
  7. 根据权利要求6所述的电流中断装置，其特征在于，所述刻痕件(101)上形成有从该刻痕区(105)凸出的凸台(106)，所述第一焊接区(103)由所述凸台(106)上表面形成并与所述刻痕区平行，并且该上表面的外周缘设置有环形焊点。
  8. 根据权利要求7所述的电流中断装置，其特征在于，所述刻痕区(105)的外周缘形成有与所述凸台反向凸出的环壁(108)，所述第二焊接区(107)形成在所述环壁(108)的外周缘并与所述刻痕区(105)平行，所述第二焊接区(107)的外周缘形成有环形焊点。
  9. 一种电池盖板组件，包括盖板(110)、位于该盖板(110)内侧的电极内端子(109)和位于该盖板(110)外侧的电极外端子(112)，所述电极内端子(109)和所述电极外端子(112)通过电流中断装置电连接，其特征在于，所述电流中断装置为根据权利要求5-8 中任意一项所述的电流中断装置，所述电极外端子(112)与所述翻转件(102)电连接，所述刻痕件(101)电连接在所述电极内端子(109)上。
  10. 根据权利要求9所述的电池盖板组件，其特征在于，所述翻转件(102)的外周缘下侧与所述盖板(110)之间密封连接有支撑环(113)，所述电极外端子(112)的外周缘电连接在所述翻转件(102)的外周缘上侧。
  11. 根据权利要求10所述的电池盖板组件，其特征在于，所述支撑环(113)的内壁形成有支撑凸缘(114)，所述翻转件(102)和所述电极外端子(112)的外周缘支撑在所述支撑凸缘(114)的上表面。
  12. 一种单体电池，该单体电池包括外壳(111)、容纳在外壳内的电芯、以及封装所述外壳的电池盖板组件，其特征在于，所述电池盖板组件为根据权利要求9-11中任意一项所述的电池盖板组件，所述电极内端子(109)与所述电芯电连接，并且所述翻转件(102)与所述外壳的内部气体连通。
  13. 一种电池模组，其特征在于，该电池模组内设置有根据权利要求12所述的单体电池。
  14. 一种动力电池，包括包体和设置在该包体内的电池模组，其特征在于，所述电池模组为根据权利要求13所述的电池模组。
  15. 一种电动汽车，其特征在于，该电动汽车设置有根据权利要求14所述的动力电池。
PCT/CN2018/120764 2017-12-13 2018-12-13 电流中断装置及其翻转件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车 WO2019114773A1 (zh)

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