WO2019120224A1 - 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

电池盖板组件、单体电池、电池模组、动力电池及电动汽车 Download PDF

Info

Publication number
WO2019120224A1
WO2019120224A1 PCT/CN2018/122113 CN2018122113W WO2019120224A1 WO 2019120224 A1 WO2019120224 A1 WO 2019120224A1 CN 2018122113 W CN2018122113 W CN 2018122113W WO 2019120224 A1 WO2019120224 A1 WO 2019120224A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
cover plate
inner lead
score
electrically connected
Prior art date
Application number
PCT/CN2018/122113
Other languages
English (en)
French (fr)
Inventor
蒋露霞
朱燕
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
Publication of WO2019120224A1 publication Critical patent/WO2019120224A1/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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/50—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
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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 battery cover assembly, a battery using the battery cover assembly, a battery module using the battery, a power battery using the battery module, and a vehicle using the 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. Realize the work of charging and discharging. Among them, during the charging and discharging process of the power battery, the voltage and current changes are usually monitored by the BMS (Battery Management System) and the state of charge is calculated. If there is a problem with the voltage sampling, it may cause the battery to overcharge. Especially for the ternary system, if the overcharge reaches a certain level, there is a danger of the battery burning and exploding.
  • BMS Battery Management System
  • 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 battery cover assembly, a battery using the battery cover assembly, a battery module using the battery, a power battery using the battery module, and a vehicle using the power battery.
  • the present disclosure provides a battery cover assembly including a cover plate, an inner lead-out member located inside the cover plate, and an electrode outer terminal located outside the cover plate, the inner lead-out member and the outer electrode terminal Electrically connected by a current interrupting device, the current interrupting device comprising a scoring member and a flip member, the flip member being electrically connected to the outer electrode terminal, the scoring member being electrically connected to the inner lead member, the engraving a scar is formed on the trace member and electrically connected to the inverting member, the flip member is capable of acting under air pressure to break the score, and the inner lead member is mounted on the cover plate by a cover insulating member
  • the cover insulating member has a first engaging portion that is engaged with the cover plate, and the cover plate is formed with a mounting hole for mounting the current interrupting device, and a plurality of surrounding holes formed around the mounting hole a card receiving hole, the cover insulating member includes a substrate attached to a lower surface of the cover plate, and the first engaging portion includes an outer portion
  • the ferrule structure includes an annular projection and a plurality of connecting posts spaced circumferentially along the annular projection, the annular projection having an L-shaped cross section to pass through the mounting hole Folding outwardly, the connecting post passes through the snap hole and is connected between the annular projection and the substrate.
  • the mounting hole and the annular protrusion are respectively formed as an elongated structure extending along a length direction of the cover plate, and the number of the connecting posts on both sides of the mounting hole width direction is the same. And set at equal intervals.
  • the cover insulating member further includes a second snap portion that is engaged with the inner lead-out member.
  • the second snap portion is formed as an annular card slot
  • the inner lead-out member is formed into a sheet-like structure for accommodating the outer circumference of the inner lead-out member
  • the cover insulating member includes a substrate that is bonded to a lower surface of the cover plate, and the second snap portion includes a second annular protrusion connected to a lower surface of the substrate, the first The two annular projections have an L-shaped cross section to form an annular card groove with the substrate that receives the outer periphery of the inner lead-out member.
  • the inner lead-out member is formed as a sheet-like structure having an intermediate weld zone electrically connected to the score member and an edge weld zone electrically connected to the battery core, the edge weld zone Located outside the intermediate weld zone to snap into an annular card slot formed by the second snap portion.
  • the thickness of the edge weld zone is greater than or equal to the thickness of the intermediate weld zone.
  • the indentation member includes a scored region formed with a score, a first weld zone for electrically interconnecting the flip member, and a second weld zone for electrical connection with the inner lead member
  • the scored region is formed as an elongated structure extending along a length direction of the cover plate, the score extending along a length direction of the elongated structure, and the first weld zone and the second weld zone They are disposed on both sides of the height direction of the scored area and are respectively formed as elongated structures extending along the length direction of the cover plate, and the intermediate welded areas are correspondingly formed into an elongated structure.
  • the intermediate weld zone is formed with a receiving weld groove for receiving the second weld zone.
  • the present disclosure also provides a single battery comprising a housing, a battery core housed within the housing, and a battery cover assembly enclosing the housing, wherein the battery cover assembly is provided for the present disclosure a battery cover assembly, the inner lead member is electrically connected to the battery core, and the flip 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 provided by the present disclosure.
  • the present disclosure also provides an electric vehicle provided with a power battery provided by the present disclosure.
  • the cover insulating member can be stably mounted on the cover plate through the closed ferrule structure, so that during the use of the battery, the force transmitted from the battery core to the inner lead-out member can be directly transmitted to the cover plate, and then Reducing the effect of the core vibration process of the cell on the indented parts attached to the inner lead-out, thereby avoiding accidental disconnection of the score.
  • FIG. 1 is a partially exploded perspective view of a battery module of the present disclosure
  • FIG. 2 is a partial perspective structural view of a flip member of a current interrupting device in an embodiment of the present disclosure
  • FIG. 3 is a top plan view of a flip member of a current interrupting device of an embodiment of the present disclosure
  • FIG. 4 is a schematic perspective structural view of a unit battery of a battery cover assembly of an embodiment of the present disclosure
  • FIG. 5 is a perspective view showing a first structure of a scoring member of a current interrupting device in an embodiment of the present disclosure
  • FIG. 6 is a perspective view showing a second structure of a scoring member of a current interrupting device in an embodiment of the present disclosure
  • FIG. 7 is a perspective view showing a third structure of a scoring member of a current interrupting device in an embodiment of the present disclosure
  • Figure 8 is a cross-sectional view of a battery cover assembly based on the score member of Figure 5 in an embodiment of the present disclosure
  • FIG. 9 is a cross-sectional view of a battery cover assembly based on the score member of FIG. 7 in an embodiment of the present disclosure
  • FIG. 10 is a partial structural schematic view of an inner lead-out member in an embodiment of the present disclosure.
  • FIG. 11 is a partial structural schematic view of another inner lead-out member in an embodiment of the present disclosure.
  • FIG. 12 is a perspective structural view of a first type of cover insulating member in an embodiment of the present disclosure
  • Figure 13 is a perspective view showing the perspective view of the cover insulating member of Figure 12;
  • FIG. 14 is a schematic perspective structural view of a second cover insulating member in an embodiment of the present disclosure.
  • Figure 15 is a cross-sectional structural view taken along line A-A of Figure 14;
  • Figure 16 is a cross-sectional view of the cover insulating member of the battery cover assembly of Figure 8 replaced with a third type of cover insulating member in the present embodiment;
  • FIG. 17 is a perspective structural view showing a fourth type of cover insulating member mounted to a cover plate in an embodiment of the present disclosure
  • Figure 18 is a cross-sectional structural view showing the cover insulating member of Figure 17 mounted on the cover;
  • Figure 19 is a partial structural view of the cover plate of Figure 17.
  • 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 battery cover assembly, a current interrupting device in a battery cover assembly, a flip member and a scoring member in a current interrupting device, and a battery cover assembly using the same
  • a current interrupting device is disposed between the electrode outer terminal 112 and the internal cell 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.
  • the present disclosure introduces the current interrupting device involved by two embodiments. The various embodiments will be described in detail below with reference to the drawings.
  • an embodiment of the present disclosure provides a battery module including a plurality of unit batteries, wherein the unit battery may include a housing 111, a battery core housed in the housing, 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 battery cover assembly further has an inner lead-out member 109 electrically connected to the battery core, and a current interrupting device is disposed between the outer electrode terminal 112 and the inner lead-out member 109 to control the input of the current of the electrode terminal. And output.
  • the current interrupting device in the normal state, the current interrupting device is in a conducting state, and 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, thereby cutting off the charge and discharge of the battery in time.
  • the source of the air pressure used is: when the battery is in a dangerous state such as overcharging, the gas inside the battery generates gas, which causes the air pressure inside the outer casing to rise, or the battery temperature rises when the battery is abnormal during use, so that the battery interior The air pressure 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 scoring member 101 can Disconnect the electrical connection under 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.
  • the indentation 104 can be broken by the inversion operation of the inverting member 102, and the inner lead-out member 109 is electrically disconnected from the electrode outer terminal 112, thereby achieving the purpose of cutting off the current.
  • the inverting member 102 is a sheet-like structure forming a taper shape, and the small end of the taper is formed as a first connecting region 115, and the big end is away from the scoring.
  • the piece 101 is formed as a second connection zone 116.
  • the tapered structure can dispose the first connecting portion 115 and the second connecting portion 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.
  • a support ring 113 is sealedly connected between the lower side of the outer periphery of the flip member 102 and the cover 110, and the electrode is externally
  • the outer periphery of the terminal 112 is electrically connected to the upper side of the outer periphery 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 flipper 102 In order to enable the flipper 102 to operate normally, as shown in FIG.
  • 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 flip member 102 is actuated, thereby avoiding the action of air pressure. The operation of the flipper 102 is prevented.
  • the support ring 113 may be supported by an insulating material or a conductive material. Generally, the support ring 113 can be a ceramic ring to insulate the cover plate 110 from being charged.
  • the battery cover assembly provided by the embodiment of the present disclosure includes a flip member 102 formed on the basis of the foregoing embodiment to extend along the length direction of the cover plate 110. structure.
  • the elongated structure herein means that the dimension in the direction of the cover plate is larger than the dimension in the other direction in the section parallel to the cover plate of the elongated structure. Therefore, as shown in FIG. 4, since the overturning member 102 is formed as an elongated structure extending along the cover plate, it is possible to reduce, for example, the current including the flip member 102 in FIG. 1 while securing the contact area with the internal gas.
  • the interruption device exposes the portion of the cover plate 110 beyond the cover plate 110 in the height direction, and even as shown in FIG. 9, can be completely within the range of the cover plate, thereby avoiding interference with other devices other than the cover plate 110, and simultaneously flipping Sensitivity is guaranteed.
  • the end portion of the elongated structure in the longitudinal direction has a circular arc shape, that is, the cross section parallel to the cover plate has a middle rectangle and curved ends at both ends.
  • the structure i.e., the structure, has no corners, thereby facilitating the formation of the annular flip member and other corresponding structures, such as the score member 101, the support ring 113 and the electrode outer terminal 112, which are fitted thereto, while accommodating the structure of the cover plate 110.
  • the elongate structure may also be a waist or elliptical structure with a long axis of the waist or elliptical cross section, ie, in the direction of the cover.
  • the parallel of the elongate structure and the cross section of the cover plate may also be formed into other shapes such as a rectangular cross section.
  • the components connected to the flip member 102 outside the cover plate 110 are the electrode outer terminal 112 and the support ring 113, it is possible to design the elongated structures which are also matched, so that, for the components
  • the connection between the at least the flip member 102 and the second connection region 115 connected to the electrode outer terminal 112 and the support ring 113 is formed into an elongated structure.
  • the support ring 113 is connected to the cover plate 110, it can be designed such that the elongated structure does not protrude beyond the edge of the cover plate 110, specifically the width edge of the cover plate 110, wherein in some embodiments the width of the support ring 113 The edges are aligned with the edges of the cover plate 110. In order to obtain a larger design and force space for the flip member 102.
  • the first connection region 116 is also formed correspondingly to an elongated structure extending along the cover plate.
  • the end of the elongated structure in the longitudinal direction is a circular arc shape, and the elongated structure may also be an elliptical or a waisted structure.
  • the corresponding score member 101 can be formed into an elongated structure as shown in FIGS. 5 to 7.
  • the inverting member 102 is formed into a tapered sheet-like structure in a direction perpendicular to the upper surface of the cap plate 110, and the first connecting portion 115 formed by the tapered small end is formed into an elongated shape.
  • the structure has a large end away from the score member 110 and forms a second connection region 116 which is parallel to the first connection region 115 and formed into an elongated structure.
  • the second connection region 106 is a flanged structure to facilitate simultaneous connection with the support ring 113 and the electrode outer terminal 122.
  • the thicknesses of the first connection region 115 and the second connection region 116 are respectively greater than the thickness of the action region 123 between the two.
  • the first connection region and the second connection region may have a thickness of 0.3-3 mm, and the action region 123 may have a thickness of 0.05-0.3 mm. This design is equally applicable to the flipper 102 in other embodiments.
  • the scoring 104 is an elongated scoring that is not closed loop.
  • the first land 103, the scored region 105, and the second land 107 are sequentially disposed in a strip shape on the vertical section of the score member 101 perpendicular to the length direction of the cap plate 110, and the score 104
  • the scoring area 105 extends along the length direction of the cover plate 110.
  • the arrangement in the vertical direction is strip-shaped, that is, the dimension of the score member in the height direction is larger than the dimension in the width direction, so that the dimension of the score member 101 in the width direction can be effectively saved, which is beneficial to the overall current.
  • the interrupting device does not extend beyond the extent of the cover plate 110 in the width direction.
  • the score region 105 is formed in an elongated structure extending in the longitudinal direction of the cover plate, that is, the dimension in the longitudinal direction of the score member is larger than the dimension in the width direction and the height direction.
  • the score 104 extends along the length of the elongated structure to form a non-closed loop score.
  • the score 104 is a linear score.
  • the score may also be An elongated score such as a curve or a broken line.
  • the first land 103 and the second land 107 are disposed on both sides in the height direction of the notch region 105.
  • the first land 103, the scored area 105, and the second land 107 are disposed in order from the top to the bottom in the height direction, thereby being lined up in the vertical section of the score member 101 perpendicular to the cover plate 110.
  • Sexual distribution Thus, it is different from the existing radial inscribed circular indentations.
  • the score 104 can also be pulled off, thereby achieving the purpose of interrupting the current.
  • the first land 103, the scored area and the second land are sequentially formed in an I-shaped structure in the height direction, that is, both sides of the two pads Solder joints that protrude from the scored area 105 and can be separately attached to other components.
  • the height direction of the score member 101 is relative to the length direction thereof, and after being assembled to the cover plate, the height direction thereof is the up-and-down direction with respect to the cover plate.
  • the first land 103, the scored region 105, and the second land 107 are sequentially formed in a zigzag structure in the height direction. That is, only one side of the two soldering regions protrudes from the notch region 105 and can form a one-sided solder joint, so that when an external force is received, the corner of the zigzag structure can have a buffering effect, so that the protection is located at two
  • the score 104 on the scored area 105 between the weld zones reduces the likelihood of the score 104 being accidentally broken.
  • the welding area of the notch 104 and the two welding zones is disposed on different planes in the height direction or the other direction, so as to reduce heat such as laser welding. The effect on the nick.
  • the inverting member 102 is formed as an elongated structure extending along the cover plate, and is disposed parallel to the elongated structure of the incision member 101, wherein
  • the flip member 102 has a first connection region 115 extending along the first land 103 and soldered to each other, the first connection region being formed into an elongated structure and the lower surface being formed with a solder groove 124 accommodating the first land 103.
  • the soldering groove 124 may be an n-shaped groove having an n-shaped cross section, or may be an L-shaped groove having an L-shaped cross section.
  • the soldering groove 124 is an n-shaped groove to be in contact with the first bonding zone 103 accommodated in the soldering groove.
  • the side edges are welded, for example by brazed seam welding, so that the electrical connections are stable.
  • the soldering groove 124 may also have an L-shaped structure to be soldered to the side edge of the first soldering region accommodated in the soldering groove away from the second soldering region. For example, by brazed seam welding. This makes it possible to form a buffer for the scored area 105 by the corners of the zigzag structure when an external force is received.
  • the score 104 may be disposed in parallel with the first land 103 and the second land 107, respectively, so that the flip member When the 102 is turned over, the maximum vertical tearing force can be applied to each portion of the score 104 without generating a component force in the other direction, thereby providing the sensitivity of the current interrupting device.
  • the end of the score 104 may penetrate to the edge of the scored area 105 or be spaced apart from the edge of the scored area 105.
  • the edge that penetrates to the scored area 105 can increase the sensitivity of the current interrupting device, while the spacing is maintained to ensure that the indentation of the indented piece 101 is caused by the internal pressure of the indented member 101 when the internal gas pressure of the battery fluctuates within a low range. There is no effect, only when the internal pressure value exceeds the predetermined value, the internal pressure of the battery can break the score 104.
  • the end of the score 104 and the edge of the scored area 105 can be designed.
  • the spacing is from 0.01 to 1 mm, and in some embodiments, the spacing of the ends of the score 104 from the edges of the scored region 105 is between 0.05 and 0.5 mm.
  • the thicknesses of the first land 103 and the second land 107 are respectively greater than or equal to the thickness of the score region 105.
  • the thickness direction thereof is inconsistent with the thickness direction of the two welded regions, and the thickness direction of the two welded regions is in the up and down direction in the figure, that is, The side edges of the soldering groove are welded, which can be understood as being perpendicular to the direction of the cover plate 110, and the thickness direction of the scored area 102 is parallel to the direction of the cover plate 110, that is, the width direction of the overall indented piece.
  • 104 is formed on the side of the scored area 105 that extends up and down.
  • the first weld zone 103 and the second weld zone 107 have a thickness of 0.4-5 mm and the score zone 105 has a thickness of 0.05-1 mm. In some embodiments, the first weld zone 103 and the second weld zone 107 have a thickness of 0.8-3 mm and the score zone 105 has a thickness of 0.1-0.8 mm. Therefore, by setting the thickness of the scored area 105 to be less than or equal to the thickness of the two welded areas, it is possible to ensure the welding strength of the welded area and provide a basis for high-quality scoring processing.
  • the thickness of the first land 103 it is also possible to design the thickness of the first land 103 to be equal to or smaller than the thickness of the second weld 107 region. Therefore, it is possible to avoid more occupation space of the flip member 102 while ensuring the welding strength, so that the flip member 102 can be designed to be thicker in the height direction as much as possible to perform a large flipping action to break the score 104.
  • the score 104 may be a strip formed on one side of the score region 105, or as shown in FIG. 5, formed on both sides of the score region 105. Two. When the score 104 is two, the two scores are aligned on both sides of the score area 105 to enhance the sensitivity of the current interrupting device.
  • the inverting member has a second connecting portion 116 formed in an elongated structure, and a supporting ring 113 is sealingly connected between the lower side of the second connecting portion 116 and the cover plate 110 .
  • the outer periphery of the electrode outer terminal 112 is electrically connected to the upper side of the second connection region 116.
  • the support ring can be formed as an elongate structure that extends along the cover plate, and in some embodiments, as shown in Figure 9, the support ring can be designed to not extend beyond the width edge of the cover plate to avoid affecting other equipment outside the battery.
  • the inner lead member 109 is formed into a sheet-like structure having An intermediate land 131 electrically connected to the score member 101 and an edge land 132 electrically connected to the cell are located outside the intermediate land 131.
  • the thickness of the edge land 132 is greater than or equal to the thickness of the intermediate land 131.
  • the edge weld zone 132 can be formed into a stepped structure with a height difference, that is, as shown in FIG. 8, the two are not in the same plane in the vertical direction, so that the edge weld zone is performed.
  • the scoring member 101 attached to the intermediate land can be cushioned.
  • the intermediate weld zone 131 has a thickness of 0.1-1 mm and the edge weld zone 132 has a thickness of 1-5 mm.
  • the edge land 132 is formed as an annular joint region surrounding the intermediate land 131, wherein the figure is a cut-away partial view through which the intermediate land 131 can be passed.
  • the edge weld zone may also be a strip weld zone located on either side of the intermediate weld zone 131.
  • the intermediate weld zone 131 is not closed so that both ends of the intermediate weld zone have openings, and such deformations fall within the scope of protection of the present disclosure.
  • the intermediate weld zone 131 and the edge weld zone 132 may be integrally formed, which can reduce the number of welded parts, and the assembly is simpler.
  • the two can also be connected separately, for example, by welding, which can increase the pair. The buffering effect of the intermediate weld zone.
  • the intermediate weld zone of the inner take-up member 109 may be formed with a receiving weld groove 133 for receiving the second weld zone 107 of the score member 101, the second weld of the receiving weld groove along the elongated structure.
  • the region 107 extends to form an elongated structure, and may penetrate the intermediate weld zone in the up and down direction, or may not pass through the through hole structure, and may be seam welded (brazed, etc.) between the second weld zone 107 and the second weld zone 107. Achieve welding.
  • the scored region 105 of the score member 101 is formed as an elongated structure extending along the length direction of the cover plate 110, the score 104 extending along the length direction of the elongated structure, and the first land 103 and
  • the second lands 107 are disposed on both sides in the height direction of the nick region 105 and are respectively formed as elongated structures extending along the length direction of the cover plate, and the intermediate lands 131 are correspondingly formed into an elongated structure and formed on the intermediate land 131
  • the inner lead-out member 109 is mounted on the cover plate 110 through the cover insulating member 122.
  • the cover insulating member 122 has a first engaging portion 125 that is engaged with the cover plate 110 and a first engaging portion that is engaged with the inner lead-out member 109.
  • Two latching portions 126 are provided.
  • the cover insulating member 122 can be stably mounted on the cover plate 110 by the snapped structure, so that the force transmitted from the battery core to the inner lead-out member 109 can be directly transmitted to the cover plate 110 during use of the battery, and then The effect of the pole core vibration process of the battery core on the score member 101 attached to the inner take-up member 109 is reduced to avoid accidental disconnection of the score 104.
  • the first engaging portion 125 and the second engaging portion 126 are respectively formed as annular card slots.
  • the first latching portion 125 or the second latching portion 126 may be formed as an annular card slot.
  • the two latching portions are each formed as an annular card slot, except that the opening directions of the two annular card slots are opposite.
  • the cover insulating member 122 includes a substrate 128 that is attached to the lower surface of the cover plate 110.
  • the cover plate 110 is formed with a current interrupting device (scratch or flip member).
  • the mounting hole 127 as shown in FIGS. 12 and 13, the first engaging portion 125 includes a first annular projection 129 attached to the upper surface of the substrate 128, the first annular projection having an L-shaped cross section to pass through After the mounting hole is folded outwardly, an annular card slot is formed with the substrate 128 to receive the hole wall of the mounting hole 127, that is, the opening of the annular card slot is located radially outward, so that the hole wall of the mounting hole 127 is inserted, and then the hole is wrapped.
  • the wall achieves a stable snap-fit of the cover plate 110 and the cover insulator 122.
  • the annular engaging groove formed by the second engaging portion 126 is for accommodating the outer peripheral edge of the inner lead-out member 109, that is, the annular portion
  • the opening of the card slot is located radially inward so that the outer periphery of the inner take-up member 109 can be inserted to wrap its outer periphery, so that the mounting of the inner take-up member 109 is more stable.
  • the second snap portion 126 includes a second annular projection 130 coupled to a lower surface of the substrate 128, the second annular projection having an L-shaped cross section to have an opening on the radially inner side to be associated with the substrate 128 forms an annular card slot that receives the outer periphery of the inner take-up member.
  • the edge weld zone 132 of the sheet-like inner lead-out member 109 is located outside the intermediate weld zone 131 to snap into the annular card slot formed by the second snap-fit portion 126. Thereby, the stable engagement of the cover insulating member 122 and the inner lead-out member 109 is completed.
  • the second cover insulating member 122 has a first engaging portion 125 that is engaged with the cover plate 110.
  • the connecting portion 125 includes a first inverted tapered protrusion and/or a first inverted tapered groove
  • the cover plate 110 is correspondingly formed with a second inverted tapered groove that positively receives the first inverted tapered protrusion.
  • a second inverted tapered projection that is positively fitted into the first inverted tapered recess, such that the cover insulating member 122 and the cover plate 110 are realized by the shape fit of the inverted tapered projection and the inverted tapered recess.
  • the card is connected in such a manner that the cover insulating member 122 and the cover plate 110 are connected to each other without protruding other structures, thereby saving space, and particularly facilitating the arrangement of the current interrupting device.
  • the first engaging portion 125 includes a plurality of first inverted tapered grooves, for example, two, and the cover plate 110 is disposed on the cover plate 110 to cooperate with the first inverted tapered groove.
  • the second inverted tapered protrusion is a plurality of first inverted tapered grooves, for example, two, and the cover plate 110 is disposed on the cover plate 110 to cooperate with the first inverted tapered groove.
  • the second inverted tapered protrusion is disposed on the cover plate 110 to cooperate with the first inverted tapered groove.
  • the first engaging portion 125 includes a plurality of first inverted tapered protrusions.
  • a plurality of the first inverted tapered protrusions are disposed on the cover plate 110.
  • the second inverted tapered groove is disposed on the cover plate 110.
  • the first engaging portion 125 includes a plurality of first inverted tapered grooves, for example, two, the plurality of first inverted tapered grooves extending parallel to each other and adjacent to the first inverted cone Forming a first inverted tapered protrusion between the shaped grooves, correspondingly, the cover plate is provided with a plurality of second inverted tapered protrusions, for example, forming a first between two adjacent second inverted tapered protrusions
  • the second inverted tapered groove that is, a first inverted tapered protrusion of the cover insulating member 122 is embedded in a second inverted tapered groove on the cover plate 110, and the two second inverted faces on the cover plate 110
  • the tapered protrusions are embedded in the two first inverted tapered grooves on the cover insulating member 122, so that the stable connection of the cover plate 110 and the cover insulating member 122 is achieved by the manner in which the groove projections are staggered.
  • the second latching portion 126 of the cover insulating member 126 and the inner lead-out member 109 are the same as the second latching portion of the first type of the cover insulating member, that is, the opening is formed on the radially inner side.
  • the substrate 128 of the cover insulating member 122 is attached to the lower surface of the cover plate 110, and the second annular protrusion 130 of the second engaging portion 126 connected to the lower surface of the substrate 128 has an L-shaped cross section.
  • An annular card slot is formed with the substrate 128 to receive the outer periphery of the inner lead-out member, and the edge land 132 of the inner lead-out member 109 is located outside the intermediate land portion 131 to be caught in the annular card groove formed by the second catch portion 126.
  • the third cover insulating member 122 has a second engaging portion 126 that is engaged with the inner lead-out member 109.
  • the second engaging portion 126 includes a first inverted tapered protrusion and/or a first inverted portion. a tapered recess, the inner lead-out member 109 correspondingly forming a second inverted tapered recess that positively receives the first inverted tapered projection, and/or a shape fitably embedded in the first inverted tapered recess
  • the two inverted tapered protrusions that is, in the present embodiment, the snap-fit between the cover insulating member 122 and the inner lead-out member 109 is achieved by the shape fit of the inverted tapered projection and the inverted tapered recess.
  • the cover insulating member 122 and the inner lead member 109 can be surface-connected without protruding other structures, thereby saving space, and particularly facilitating the arrangement of the current interrupting device.
  • the second latching portion 126 includes a plurality of first inverted tapered protrusions, for example, two.
  • the inner lead-out member 109 is provided with a plurality of second inverted surfaces that cooperate with the first inverted tapered protrusions. Tapered groove.
  • the second latching portion 126 includes a plurality of first inverted tapered recesses.
  • the inner lead-out member 109 is provided with a plurality of second inverted tapered projections that cooperate with the first inverted tapered recesses.
  • the second catching portion 126 includes a plurality of first inverted tapered protrusions, for example two, the plurality of first inverted tapered protrusions extending parallel to each other and forming between adjacent first inverted tapered protrusions a first inverted tapered groove, correspondingly, the inner take-off member 109 is provided with a plurality of second inverted tapered grooves, for example two, and a second inverted cone is formed between the adjacent second inverted tapered grooves Shaped bumps. That is, as shown in FIG.
  • the two first inverted tapered projections of the cover insulating member 122 are embedded in the two second inverted tapered grooves on the inner lead-out member 109, and the first one on the inner lead-out member 109
  • the two inverted tapered protrusions are embedded in a first inverted tapered groove on the cover insulating member 122, so that the inner lead-out member 109 and the cover insulating member 122 are stabilized by the manner in which the groove protrusions are staggered. connection.
  • the edge lands 132 of the inner lead-out member 109 forming the sheet-like structure are formed with a second inverted tapered protrusion and/or a second inverted tapered groove that is engaged with the second engaging portion 126, that is, In the present embodiment, as shown in FIG. 16, the two second inverted tapered grooves are formed on the edge land 132 on both sides of the intermediate land 131.
  • the first engaging portion 125 of the cover insulating member 126 and the cover plate 110 are the same as the first engaging portion 125 of the first type of the cover insulating member, that is, the opening is formed in the radial direction.
  • the outer cover ring slot 122 in some embodiments, the cover insulating member 122 in the embodiment includes a base plate 128 that is attached to the lower surface of the cover plate 110, and the cover plate 110 is formed with a mounting hole 127 for mounting a current interrupting device.
  • the first engaging portion 125 includes a first annular protrusion 129 connected to the upper surface of the substrate 128, the first annular protrusion having an L-shaped cross section to be folded outwardly to form a substrate 128 after passing through the mounting hole.
  • An annular card slot that receives the wall of the hole in the mounting hole 127.
  • the fourth cover insulating member 122 has a first engaging portion 125 that is engaged with the cover plate 110, and a mounting hole 127 for mounting a current interrupting device is formed on the cover plate 110, and
  • the mounting hole 127 defines a plurality of latching holes 134.
  • the cover insulating member 122 includes a substrate 128 that is attached to the lower surface of the cover plate 110.
  • the first latching portion 125 includes a mounting portion extending upward from the upper surface of the substrate 128.
  • the hole 127 is folded outwardly and downwardly through the ferrule structure of the snap hole and the substrate 128, so that the snap-fit between the cover plate 110 and the cover insulating member 122 is stabilized by the closed ferrule structure.
  • the closed ferrule structure includes an annular projection 135 and a plurality of connecting posts 136 spaced circumferentially along the annular projection, the annular projection 135 having an L-shaped cross section to pass through the mounting aperture Folding outwardly, the connecting post 136 passes through the engaging hole 134 and is connected between the annular protrusion 135 and the substrate 128, thereby realizing the respective ferrule structure composed of the annular protrusion 135, the connecting post 136 and the substrate 128, among which The connecting posts 136 can be evenly distributed as shown in Figure 17 to ensure the strength of the ferrule structure.
  • the mounting hole 127 and the annular projection 135 are respectively formed as elongated structures extending along the length direction of the cover plate 110, wherein the number of the connecting posts 136 located on both sides in the width direction of the mounting hole 127 is the same, and is equally spaced.
  • the spacing of the connecting posts on both sides is also the same, that is, the connecting posts 136 on both sides are arranged one by one in the width direction, so that the strength of the ferrule structure is stable and can be uniformly transmitted to the battery cells.
  • the vibration of the inner take-up piece 109 is effectively transmitted to the cap plate 110 through the edge joint region 132, and the possibility of being affected on the scoring member 101 attached to the intermediate land 131 is reduced.
  • the second engaging portion 126 of the cover insulating member 126 and the inner lead-out member 109 in the embodiment is the same as the second engaging portion of the first type of cover insulating member, that is, formed as an opening.
  • An annular card slot located radially inward.
  • the inner lead-out member 109 is formed into a sheet-like structure for accommodating the outer peripheral edge of the inner lead-out member 109, and the cover insulating member 122 is second with the lower surface of the substrate 128 that is bonded to the lower surface of the cover plate 110.
  • the annular projection 130 has an L-shaped cross section to form an annular card slot with the base plate 128 that receives the outer periphery of the inner take-up member.
  • the edge land 132 of the inner lead member 109 forming the sheet-like structure is located outside the intermediate land 131 to be caught in the annular card groove formed by the second engaging portion.
  • a battery cover assembly includes a cover plate 110, an inner lead-out member 109 located inside the cover plate 110, and an electrode outer terminal 112 located outside the cover plate 110, and the inner lead-out member 109 and the outer electrode terminal 112 pass
  • the current interrupting device is electrically connected
  • the current interrupting device includes a scoring member 101 and a flip member 102, the flip member is electrically connected to the electrode outer terminal, and the scoring member is electrically connected to the inner lead member,
  • a score 104 is formed on the score member and electrically connected to the flip member 102.
  • the flip member 102 can be operated under the action of air pressure to break the score 104, and the flip member 102 is pulled and cut 104, and then taken out.
  • the member 109 is electrically disconnected from the electrode outer terminal 112.
  • the inner lead member 109 is mounted on the cover plate 110 by a cover insulating member 122 having a first contact with the cover plate 110.
  • a latching portion 125 is formed with a mounting hole 127 for mounting the current interrupting device, and a plurality of latching holes 134 formed around the mounting hole 127.
  • the cover insulating member 122 includes a substrate 128 that is bonded to the lower surface of the cover plate 110, and the first card joint portion 1 25 includes a ferrule structure that folds outwardly from the upper surface of the substrate 128 through the mounting hole 127 and that folds outwardly through the snap hole and the substrate 128.
  • the ferrule structure includes an annular projection 135 and a plurality of connecting posts 136 spaced circumferentially along the annular projection, the annular projection 135 having an L-shaped cross section to pass through the The mounting hole is folded outward, and the connecting post passes through the engaging hole 134 and is connected between the annular projection 135 and the substrate 128.
  • the mounting hole and the annular projection are respectively formed as an elongated structure extending along a length direction of the cover plate, and the number of the connecting posts 136 on both sides of the mounting hole width direction is the same And set at equal intervals.
  • the cover insulating member 126 further includes a second engaging portion 126 that is engaged with the inner lead-out member 109.
  • the second catching portion 126 is formed as an annular card slot, and the inner lead-out member 109 is formed in a sheet-like structure for receiving the outer peripheral edge of the inner lead-out member 109.
  • the second snap portion 126 includes a second annular protrusion 130 connected to a lower surface of the substrate 128, the second annular protrusion having an L-shaped cross section to form with the substrate 128.
  • An annular card slot that receives the outer periphery of the inner take-up member.
  • the inner take-up member 109 is formed as a sheet-like structure having an intermediate weld zone 131 electrically connected to the score member 101 and an edge weld zone 132 electrically connected to the battery core.
  • the edge land 132 is located outside the intermediate land 131 to be snapped into the annular card groove formed by the second engaging portion.
  • the thickness of the edge land 132 is greater than or equal to the thickness of the intermediate land 131.
  • the indentation member 101 includes a scored region 105 formed with a score 104, a first land 103 for electrically interconnecting the flip member 102, and an electrical connection with the inner lead member 109.
  • a second welded land 107 connected the scored region 105 being formed as an elongated structure extending along a length direction of the cover plate 110, the score 104 extending along a length direction of the elongated structure, and the A weld zone and the second weld zone are disposed on both sides of the height direction of the scored zone 105 and are respectively formed as elongated structures extending along a length direction of the cover plate, and the intermediate weld zone 131 is correspondingly formed Long structure.
  • the intermediate land 131 is formed with a receiving groove 133 for receiving the second land 107.
  • 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 inner lead member 109 is electrically connected to the battery core, and the inner gas of the flip member 102 and the outer casing Connected.
  • 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.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种电池盖板组件、单体电池、电池模组、动力电池及电动汽车，电池盖板组件包括盖板、内引出件和电极外端子，内引出件和电极外端子通过电流中断装置电连接，电流中断装置的翻转件与电极外端子电连接，刻痕件与内引出件电连接，刻痕件上形成有刻痕并与翻转件电连接，内引出件通过盖板绝缘件安装在盖板，盖板绝缘件具有与盖板卡接的第一卡接部，盖板上形成有用于安装电流中断装置的安装孔，以及围绕该安装孔形成的多个卡接孔，盖板绝缘件包括与盖板下表面贴合的基板，第一卡接部包括从在基板的上表面向上延伸穿过安装孔后向外翻折，并向下穿过卡接孔与基板的卡套结构。

Description

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22日提交的、发明名称为“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“201721829033.2”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，提供一种能够自身强制断开充放电电路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，本公开提供一种电池盖板组件，包括盖板、位于该盖板内侧的内引出件和位于该盖板外侧的电极外端子，所述内引出件和所述电极外端子通过电流中断装置电连接，所述电流中断装置包括刻痕件和翻转件，所述翻转件与所述电极外端子电连接，所述刻痕件与所述内引出件电连接，所述刻痕件上形成有刻痕并与所述翻转件电连接，所述翻转件能够在气压作用下动作以拉断所述刻痕，所述内引出件通过盖板绝缘件安装在所 述盖板上，所述盖板绝缘件具有与所述盖板卡接的第一卡接部，所述盖板上形成有用于安装所述电流中断装置的安装孔，以及围绕该安装孔形成的多个卡接孔，所述盖板绝缘件包括与所述盖板下表面贴合的基板，所述第一卡接部包括从在所述基板的上表面向上延伸穿过所述安装孔后向外翻折，并向下穿过所述卡接孔与所述基板的卡套结构。
在一些实施例中，所述卡套结构包括环形凸起和沿该环形凸起的周向间隔设置的多个连接柱，所述环形凸起具有L型截面以在穿过所述安装孔后向外翻折，所述连接柱穿过所述卡接孔并连接在所述环形凸起和所述基板之间。
在一些实施例中，所述安装孔和所述环形凸起分别形成为沿所述盖板的长度方向延伸的长形结构，位于所述安装孔宽度方向两侧的所述连接柱数量相同，且等间隔设置。
在一些实施例中，所述盖板绝缘件还包括与所述内引出件卡接的第二卡接部。
在一些实施例中，所述第二卡接部形成为环形卡槽，所述内引出件形成为片状结构，该环形卡槽用于容纳所述内引出件的外周缘
在一些实施例中，所述盖板绝缘件包括与所述盖板下表面贴合的基板，所述第二卡接部包括连接在所述基板的下表面的第二环形凸起，该第二环形凸起具有L型截面，以与所述基板形成容纳所述内引出件的外周缘的环形卡槽。
在一些实施例中，所述内引出件形成为片状结构，该片状结构具有与所述刻痕件电连接的中间焊接区和与电芯电连接的边缘焊接区，所述边缘焊接区位于所述中间焊接区的外侧以卡入由所述第二卡接部形成的环形卡槽中。
在一些实施例中，所述边缘焊接区的厚度大于等于所述中间焊接区的厚度。
在一些实施例中，所述刻痕件包括形成有刻痕的刻痕区、用于与所述翻转件相互电连接的第一焊接区以及用于与内引出件电连接的第二焊接区，所述刻痕区形成为沿所述盖板的长度方向延伸的长形结构，所述刻痕沿该长形结构的长度方向延伸，并且所述第一焊接区和所述第二焊接区设置在所述刻痕区高度方向的两侧并分别形成为沿所述盖板的长度方向延伸的长形结构，所述中间焊接区对应地形成为长形结构。
在一些实施例中，所述中间焊接区上形成有容纳所述第二焊接区的容纳焊槽。
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，其特征在于，所述电池盖板组件为本公开提供的电池盖板组件，所述内引出件与所述电芯电连接，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提供的电池模组。
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，盖板绝缘件可以通过封闭的卡套结构稳定安装在盖板上，从而在电池的使用过程中，从电芯传到内引出件的力可以直接传递到盖板上，继而减少电芯的极芯振动过程对连接在内引出件上的刻痕件的影响，从而避免刻痕的意外断开。
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，但且不构成对本公开的限制。在附图中：
图1是本公开一种电池模组的部分分解立体示意图；
图2是本公开的实施方式中电流中断装置的翻转件的部分立体结构示意图；
图3是本公开的实施方式电流中断装置的翻转件的俯视平面图；
图4是本公开的实施方式电池盖板组件的单体电池的立体结构示意图；
图5是本公开的实施方式中电流中断装置的刻痕件的第一种结构的立体示意图；
图6是本公开的实施方式中电流中断装置的刻痕件的第二种结构的立体示意图；
图7是本公开的实施方式中电流中断装置的刻痕件的第三种结构的立体示意图；
图8是本公开的实施方式中基于图5的刻痕件的电池盖板组件的剖视图；
图9是本公开的实施方式中基于图7的刻痕件的电池盖板组件的剖视图；
图10是本公开的实施方式中一种内引出件的部分结构示意图；
图11是本公开的实施方式中另一种内引出件的部分结构示意图；
图12是本公开的实施方式中第一种盖板绝缘件的立体结构示意图；
图13是图12中的盖板绝缘件另一视角的立体结构示意图；
图14是本公开的实施方式中第二种盖板绝缘件的立体结构示意图；
图15是沿图14中的线A-A截取的剖视结构示意图；
图16是图8中的电池盖板组件中的盖板绝缘件被替换为本实施方式中第三种盖板绝缘件的剖视图；
图17是本公开的实施方式中第四种盖板绝缘件安装到盖板的立体结构示意图；
图18是图17的盖板绝缘件安装到盖板上的剖视结构示意图；
图19是图17中的盖板的部分结构示意图。
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，且不用于限制本公开。
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11所示，本公开提供了一种电池盖板组件，电池盖板组件中的电流中断装置，电流中断装置中的翻转件和刻痕件，以及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和内部电芯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。在一些实施例中，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4所示，本公开的实施方式中提供一种电池模组，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、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。其中，如图8所示，电池盖板组件还具有与该电芯电连接的内引出件109，电流中断装置设置在电极外端子112与内引出件109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，电芯处于导通的状态，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而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8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与刻痕件101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而实现内引出件109与电极外端子112断开电连接，从而实现切断电流的传递的目的。
之所以采用这种方式，是考虑由于在例如动力电池的领域中，需要通过的电流较大，因此需要保证刻痕件101和翻转件102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
其中，在本公开的实施方式中，如图2和图3所示，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、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8和图9所示，在本公开的实施方式中，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，如图4所示，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妨碍翻转件102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。
如图2和图3所示，本公开的实施方式提供的电池盖板组件，包括翻转件102，该翻转件在前述实施方式的基础上，形成为沿盖板110的长度方向延伸的长形结构。其中，本文中的长形结构是指在该长形结构的平行于盖板的截面中，沿盖板方向上的尺寸要大于其他方向上的尺寸。因此，如图4所示，由于翻转件102上形成为沿盖板延伸的长形结构，因此能够在保证与内部气体的接触面积的情况下，减少例如图1中包括该翻转件102的电流中断装置露出盖板110的部分沿高度方向超出盖板110的可能，甚至如图9所示，能够完全在盖板的范围之内，从而避免对盖板110以外的其他装置造成干涉，同时翻转灵敏度得到保证。
其中如图2至图4所示，在本公开的实施方式中，该长形结构沿长度方向的端部为圆弧形，即其平行于盖板的截面具有中间的矩形和两端的弧形结构，即结构无拐角，从而在适应盖板110的结构的同时，便于形成环形的翻转件和其他对应的结构，例如与之配合的刻痕件101、支撑环113和电极外端子112。在其他实施方式中，长形结构还可以为为腰形结构或椭圆结构，其腰形结构或椭圆截面的长轴即沿盖板的方向。在有些实施方式中，长形结构的平行与盖板的截面还可以形成为矩形截面等其他形状。
在本公开的实施方式中，由于与翻转件102在盖板110外连接的部件为电极外端子112 和支撑环113，因此可以设计二者同样为相配合的长形结构，这样，为了部件之间的连接，至少翻转件102中与电极外端子112和支撑环113相连的第二连接区115形成为长形结构。其中的支撑环113由于与盖板110相连，可以设计其形成的长形结构不伸出盖板110的边缘，具体为盖板110的宽度边缘，其中在一些实施例中该支撑环113的宽度边缘和盖板110的边缘对齐。以使得翻转件102获得较大的设计和受力空间。
在本实施方式中，如图2所示，第一连接区116也对应形成为沿盖板延伸的长形结构。所述长形结构沿长度方向的端部为圆弧形，所述长形结构也可以为椭圆或腰形结构。对应的刻痕件101则可以形成为如图5至图7所示的长形结构。
继续描述本实施方式中的翻转件102，翻转件102沿垂直于盖板110上表面的方向为形成锥形的片状结构，该锥形的小端形成的第一连接区115形成为长形结构，大端远离刻痕件110并且形成第二连接区116，该第二连接区116与第一连接区115平行并形成为长形结构。在一些实施例中，第二连接区106为翻边结构，以方便同时和支撑环113和电极外端子122相连。
在本实施方式中，为了保证连接强度，第一连接区115和第二连接区116的厚度分别大于二者之间的动作区域123厚度。在一些实施例中，第一连接区和第二连接区的厚度为可以0.3-3mm，动作区域123的厚度可以为0.05-0.3mm。该设计同样适用于其他实施方式中的翻转件102。
如图5至图7所示，基于本公开的实施方式提供的电池盖板组件，继续介绍本公开提供的三种刻痕件。不同于现有的刻痕形成为环形结构的刻痕件，本实施方式中提供的刻痕件101中，刻痕104为非闭环的长形刻痕。在一些实施例中，在刻痕件101垂直于盖板110长度方向的竖直截面上，第一焊接区103、刻痕区105和第二焊接区107呈条状依次设置，并且刻痕104在刻痕区105上沿盖板110的长度方向延伸。这样通过拉断刻痕104同样能够断开第一焊接区103和第二焊接区107之间的电连接，起到电流中断的作用。另外在竖直方向上呈条状的布置方式，即刻痕件在高度方向上的尺寸大于其在宽度方向上的尺寸，这样可以有效节省刻痕件101在宽度方向上的尺寸，有利于整体电流中断装置在宽度方向上不超出盖板110的范围。
另外，在本实施方式中，刻痕区105形成为沿盖板的长度方向延伸的长形结构，即刻痕件长度方向上的尺寸大于其宽度方向和高度方向上的尺寸。其中的刻痕104沿该长形结构的长度方向延伸，从而形成非闭环的刻痕，在一些实施例中，刻痕104为直线形刻痕，在其他可能的实施方式中，刻痕还可以为曲线或折线等长形刻痕。并且为了实现刻痕104的拉断，第一焊接区103和第二焊接区107设置在刻痕区105高度方向的两侧。即如图的方位中，第一焊接区103、刻痕区105和第二焊接区107沿高度方向从上至下依次设置， 从而在刻痕件101的垂直于盖板110的竖直截面上线性分布。从而有别于现有的成径向分布的环形刻痕件。这样，翻转件102受力翻转后，同样可以将刻痕104拉断，从而实现电流中断的目的。
如图5和图6所示，在一种实施例中，第一焊接区103、刻痕区和第二焊接区在高度方向上依次形成为工字型结构，即两个焊接区的两侧均从刻痕区105凸出并可以分别和其他部件的焊点。这样在与翻转件和电机内端子焊接时，焊接更加稳定，避免出现在外力作用下出现焊点意外断开的问题。其中刻痕件101的高度方向是相对于其长度方向而言的，在装配到盖板上之后，其高度方向即相对于盖板的上下方向。在另一种实施例中，第一焊接区103、刻痕区105和第二焊接区107在高度方向上依次形成为Z字型结构。即，两个焊接区只有一侧从刻痕区105凸出并可以形成单侧焊点，这样，在收到外力冲击时，Z字型结构的拐角处可以具有缓冲效果，从而保护位于两个焊接区之间的刻痕区105上的刻痕104，而降低刻痕104意外断裂的可能。
另外，不论工字还是Z字，均能够使得本实施方式中，刻痕104与两个焊接区的焊接区域设置在高度方向或其他方向上均在不同平面上，从而以减小激光焊接等热量对刻痕的影响。
为了适应这种长形刻痕件101，如图2所示，其中的翻转件102形成为沿盖板延伸的长形结构，并且和刻痕件101的长形结构相互平行的设置，其中，翻转件102具有的第一连接区115沿第一焊接区103延伸并相互焊接，该第一连接区形成为长形结构并且下表面形成有容纳第一焊接区103的焊槽124。其中焊槽124可以为截面为n形的n型槽，也可以为截面为L型的L型槽。
在一些实施例中，如图2和图7所示，当刻痕件101为工字型结构时，焊槽124为n型槽，以与容纳进该焊槽的第一焊接区103的两个侧边缘焊接，例如通过钎焊缝焊焊接，从而使得二者电连接稳定。
另外，如图9所示，当刻痕件101为Z字型结构时，焊槽124还可以L型结构，以与容纳进该焊槽的第一焊接区远离第二焊接区的侧边缘焊接，例如通过钎焊缝焊焊接。这样可以在收到外力时，通过Z字型结构的拐角形成对刻痕区105的缓冲。
在本实施方式中，不论工字型或Z字型结构，亦或是一半工字一半Z字，刻痕104可以设置分别与第一焊接区103和第二焊接区107平行，使得在翻转件102翻转时，能够对刻痕104的各部分均施加最大的垂直撕扯力，而不产生其他方向的分力，从而提供电流中断装置的灵敏度。
在本实施方式中，如图5或图6所示，刻痕104的端部可以贯通至刻痕区105边缘亦或与刻痕区105的边缘间隔设置。其中贯通至刻痕区105的边缘可以提升电流中断装置的 灵敏度，而保有间隔则能保证刻痕件101在电池内部气压在低范围内波动时，电池内压对刻痕片101的刻痕104不会有影响，只有当内压值超过预定值时，电池内部压力才能将刻痕104拉断。
如图6所示，当刻痕105的端部与刻痕区105的边缘之间具有间隔时，尤其是两端具具有间隔时，可以设计刻痕104的端部与刻痕区105的边缘的间隔为0.01-1mm，在一些实施例中，刻痕104的端部与刻痕区105的边缘的间隔为0.05-0.5mm。从而既能够保证电流中断装置的灵敏度，还能够保证刻痕不受外力或内部气压波动的影响而以外断开。
在本实施方式的工字型和Z字型的两种实施例中，第一焊接区103和第二焊接区107的厚度分别大于或等于刻痕区105的厚度。此处需要说明的是，由于刻痕区105的形成为板状结构，其厚度方向与两个焊接区的厚度方向且不一致，其中两个焊接区的厚度方向在图中为上下方向，即与焊槽的侧边缘进行焊接，其可以理解为垂直于盖板110的方向，而刻痕区102的厚度方向则为平行与盖板110的方向，即整体刻痕件的宽度方向，此时刻痕104形成在刻痕区105上下延伸的侧面上。
在一些实施例中，第一焊接区103和第二焊接区107的厚度为0.4-5mm，刻痕区105的厚度为0.05-1mm。在一些实施例中，第一焊接区103和第二焊接区107的厚度为0.8-3mm，刻痕区105的厚度为0.1-0.8mm。因此，通过设置刻痕区105的厚度小于等于两个焊接区的厚度，既能保证焊接区域的焊接强度，又能为高质量的刻痕加工提供基础。
另外，还可以设计第一焊接区103的厚度等于或小于第二焊接107区的厚度。因此可以在保证焊接强度的同时，避免较多的占用翻转件102的装配空间，使得翻转件102可以尽量在高度方向上设计的较厚，以进行较大的翻转动作而拉断刻痕104。
在本实施方式中，如图6和图7所示，刻痕104可以为形成在刻痕区105单面上的一条，或者如图5所示，为形成在刻痕区105双面上的两条。当刻痕104为两条时，两条刻痕在刻痕区105的两面上对齐设置，以提升电流中断装置的灵敏度。
在本实施方式中，如图8和图9所示，翻转件具有形成为长形结构的第二连接区116，第二连接区116的下侧与盖板110之间密封连接有支撑环113，电极外端子112的外周缘电连接在第二连接区116的上侧。这样，支撑环可以形成为沿盖板延伸的长形结构，并且在一些实施例中，可以如图9所示，设计支撑环不超出盖板的宽度边缘，从而避免影响电池外的其他设备。
为了适应长形刻痕件101的装配，在本公开实施方式提供的电池盖板组件中如图8、图10和图11所示，内引出件109形成为片状结构，该片状结构具有与刻痕件101电连接的中间焊接区131和与电芯电连接的边缘焊接区132，边缘焊接区132位于中间焊接区131的外侧。其中，边缘焊接区132的厚度大于等于中间焊接区131的厚度。在中间焊接区131 的厚度较小时，能够和边缘焊接区132构成台阶结构而具有高度差，即如图8所示，二者在竖直方向上不在同一平面上，这样，在进行边缘焊接区和电芯极耳或者和与电芯之间的其他转接件焊接时，能够对连接在中间焊接区的刻痕件101起到缓冲作用。
在一些实施例中，为了保证结构强度和缓冲作用，在一些实施例中，中间焊接区131的厚度为0.1-1mm，边缘焊接区132的厚度为1-5mm。另外在结构上，如图10所示，边缘焊接区132形成为围绕中间焊接区131的环形连接区，其中该图为被截取的部分图，通过环形的边缘焊接区132可以将中间焊接区131包围，另外如图11所示，边缘焊接区还可以为位于该中间焊接区131两侧的条形焊接区。即不封闭中间焊接区131，使得中间焊接区两端具有开口，对于此类变形均落在本公开的保护范围中。另外，中间焊接区131和边缘焊接区132可以一体成型，这样可以减少部件的焊接数量，装配更加简单，在一些实施方式中，二者还可以分体相连，例如通过焊接相连，这样可以增加对中间焊接区域的缓冲作用。
进一步，如图8所示，内引出件109的中间焊接区上可以形成有容纳刻痕件101的第二焊接区107的容纳焊槽133，该容纳焊槽沿形成长形结构的第二焊接区107延伸而同样形成长形结构，并且可以是在上下方向上贯通中间焊接区，也可以通孔结构也可以不贯通，其与第二焊接区107之间可以通过缝焊(钎焊等)实现焊接。
在本实施方式中，刻痕件101的刻痕区105形成为沿盖板110的长度方向延伸的长形结构，刻痕104沿该长形结构的长度方向延伸，并且第一焊接区103和第二焊接区107设置在刻痕区105高度方向的两侧并分别形成为沿盖板的长度方向延伸的长形结构，中间焊接区131对应地形成为长形结构，并且中间焊接区131上形成有容纳第二焊接区107的容纳焊槽133。
进一步如图12至图19所示，继续详细介绍本公开中的多种盖板绝缘件122。其中，内引出件109通过盖板绝缘件122安装在盖板110上，其中，盖板绝缘件122具有与盖板110卡接的第一卡接部125和与内引出件109卡接的第二卡接部126。即，盖板绝缘件122可以通过卡接的结构稳定安装在盖板110上，从而在电池的使用过程中，从电芯传到内引出件109的力可以直接传递到盖板110上，继而减少电芯的极芯振动过程对连接在内引出件109上的刻痕件101的影响，从而避免刻痕104的意外断开。
如图8、图12和图13所示，在第一种盖板绝缘件122中，第一卡接部125和第二卡接部126分别形成为环形卡槽。在其他实施方式中，也可以只有第一卡接部125或第二卡接部126形成为环形卡槽。其中，在本实施方式中，两个卡接部均形成为环形卡槽，不同的是两个环形卡槽的开口方向相反。
在一些实施例中，盖板绝缘件122包括与盖板110下表面贴合的基板128，如图8所示， 盖板110上形成有用于安装电流中断装置(刻痕件或翻转件)的安装孔127，如图12和图13所示，第一卡接部125包括连接在基板128的上表面的第一环形凸起129，该第一环形凸起具有L型截面，以在穿过安装孔后向外翻折而与基板128形成容纳安装孔127的孔壁的环形卡槽，即该环形卡槽的开口位于径向外侧，从而供安装孔127的孔壁插入，继而包裹该孔壁，实现盖板110和盖板绝缘件122的稳定卡接。
不同于第一卡接部125，如上所述，由于内引出件109可以形成为片状结构，第二卡接部126形成的环形卡槽用于容纳内引出件109的外周缘，即该环形卡槽的开口位于径向内侧，从而可以使得内引出件109的外周缘插入而包裹其外周缘，使得内引出件109的安装更加稳固。在一些实施例中，第二卡接部126包括连接在基板128的下表面的第二环形凸起130，该第二环形凸起具有L型截面以具有位于径向内侧的开口，以与基板128形成容纳内引出件的外周缘的环形卡槽。在一些实施例中，上述的形成片状的内引出件109的边缘焊接区132位于中间焊接区131的外侧以卡入由第二卡接部126形成的环形卡槽中。从而完成盖板绝缘件122和内引出件109的稳定卡接。
如图14和图15所示，第二种盖板绝缘件122具有与盖板110卡接的第一卡接部125，不同于第一种盖板绝缘件，本实施例中的第一卡接部125包括第一倒锥形凸起和/或第一倒锥形凹槽，盖板110对应地上形成有形状配合地容纳该第一倒锥形凸起的第二倒锥形凹槽，以及/或者形状配合地嵌入第一倒锥形凹槽的第二倒锥形凸起，从而通过倒锥形凸起和倒锥形凹槽的形状配合实现盖板绝缘件122和盖板110之间的卡接，这种卡接方式可以使得盖板绝缘件122和盖板110实现面面连接而不会凸出其他结构，从而更加节省空间，尤其有利于电流中断装置的布置。
在本实施例中，第一卡接部125包括多个第一倒锥形凹槽，例如两个，在所述盖板110上设置有多个与该第一倒锥形凹槽相配合的第二倒锥形凸起。
在另一实施方式中，第一卡接部125包括多个第一倒锥形凸起，对应地，在所述盖板110上设置有多个与该第一倒锥形凸起相配合的第二倒锥形凹槽。
在另一种实施方式中，第一卡接部125包括多个第一倒锥形凹槽，例如两个，该多个第一倒锥形凹槽相互平行地延伸并且相邻第一倒锥形凹槽之间形成一个第一倒锥形凸起，对应地，盖板上设置有多个第二倒锥形凸起，例如两个相邻第二倒锥形凸起之间形成一个第二倒锥形凹槽，即，盖板绝缘件122的一个第一倒锥形凸起嵌入到盖板110上的一个第二倒锥形凹槽中，盖板110上的两个第二倒锥形凸起则嵌入盖板绝缘件122上的两个第一倒锥形凹槽中，从而通过凹槽凸起交错的卡接方式，实现盖板110和盖板绝缘件122的稳定连接。
其中在本实施例中，盖板绝缘件126与内引出件109卡接的第二卡接部126与第一种 盖板绝缘件的第二卡接部相同，即形成为开口在径向内侧的环形卡槽，以用于容纳形成为片状结构的内引出件109的外周缘。在一些实施例中，盖板绝缘件122的基板128与盖板110下表面贴合，第二卡接部126的连接在基板128的下表面的第二环形凸起130具有L型截面，以与基板128形成容纳内引出件的外周缘的环形卡槽，内引出件109的边缘焊接区132位于中间焊接区131的外侧以卡入由第二卡接部126形成的环形卡槽中。
如图16所示，第三种盖板绝缘件122具有与内引出件109卡接的第二卡接部126，第二卡接部126包括第一倒锥形凸起和/或第一倒锥形凹槽，内引出件109对应地上形成有形状配合地容纳该第一倒锥形凸起的第二倒锥形凹槽，以及/或者形状配合地嵌入第一倒锥形凹槽的第二倒锥形凸起，即在本实施例中，通过倒锥形凸起和倒锥形凹槽的形状配合实现盖板绝缘件122和内引出件109之间的卡接，这种卡接方式可以使得盖板绝缘件122和内引出件109实现面面连接而不会凸出其他结构，从而更加节省空间，尤其有利于电流中断装置的布置。
其中，第二卡接部126包括多个第一倒锥形凸起，例如两个，对应地，内引出件109上设置有多个与该第一倒锥形凸起相配合的第二倒锥形凹槽。
或者，第二卡接部126包括多个第一倒锥形凹槽，对应地，在内引出件109上设置有多个与该第一倒锥形凹槽相配合的第二倒锥形凸起。
或者，第二卡接部126包括多个第一倒锥形凸起，例如两个，该多个第一倒锥形凸起相互平行地延伸并且相邻第一倒锥形凸起之间形成一个第一倒锥形凹槽，对应地，内引出件109上设置有多个第二倒锥形凹槽，例如两个，相邻第二倒锥形凹槽之间形成一个第二倒锥形凸起。即，如图16所示，盖板绝缘件122的两个第一倒锥形凸起嵌入到内引出件109上的两个第二倒锥形凹槽中，内引出件109上的一个第二倒锥形凸起则嵌入盖板绝缘件122上的一个第一倒锥形凹槽中，从而通过凹槽凸起交错的卡接方式，实现内引出件109和盖板绝缘件122的稳定连接。
其中，形成片状结构的内引出件109的边缘焊接区132上形成有与第二卡接部126上卡接的第二倒锥形凸起和/或第二倒锥形凹槽，即在本实施例中，如图16所示，上述中的两个第二倒锥形凹槽形成在中间焊接区131两侧的的边缘焊接区132上。
在本实施例中，盖板绝缘件126与盖板110卡接的第一卡接部125与上述的第一种盖板绝缘件的第一卡接部125相同，即形成为开口在径向外侧的环形卡槽，在一些实施例中，本实施例中的盖板绝缘件122包括与盖板110下表面贴合的基板128，盖板110上形成有用于安装电流中断装置的安装孔127，第一卡接部125包括连接在基板128的上表面的第一环形凸起129，该第一环形凸起具有L型截面，以在穿过安装孔后向外翻折而与基板128形成容纳安装孔127的孔壁的环形卡槽。
如图17至图19所示，第四种盖板绝缘件122具有与盖板110卡接的第一卡接部125，盖板110上形成有用于安装电流中断装置的安装孔127，以及围绕该安装孔127形成的多个卡接孔134，盖板绝缘件122包括与盖板110下表面贴合的基板128，第一卡接部125包括从在基板128的上表面向上延伸穿过安装孔127后向外翻折并向下穿过卡接孔与基板128的卡套结构，从而通过这种封闭的卡套结构，使得盖板110和盖板绝缘件122之间卡接稳定。
在一些实施例中，该封闭的卡套结构包括环形凸起135和沿该环形凸起的周向间隔设置的多个连接柱136，环形凸起135具有L型截面以在穿过安装孔后向外翻折，连接柱136穿过卡接孔134并连接在环形凸起135和基板128之间，从而实现由环形凸起135、连接柱136和基板128构成分别的卡套结构，其中多个连接柱136如图17所示可以均匀分布以保证卡套结构的强度。在一些实施例中，安装孔127和环形凸起135分别形成为沿盖板110的长度方向延伸的长形结构，其中位于安装孔127宽度方向两侧的连接柱136数量相同，且等间隔设置，在一些实施例中，两侧连接柱的间隔也相同，即两侧的连接柱136在宽度方向上一一对齐的设置，从而使得卡套结构的强度稳定并能够均匀地将由电芯传递给内引出片109的振动通过边缘连接区132有效传递到盖板110上，而降低连接在中间焊接区131上的刻痕件101上被影响的可能。
如图18所示，本实施例中的盖板绝缘件126与内引出件109卡接的第二卡接部126与第一种盖板绝缘件的第二卡接部相同，即形成为开口位于径向内侧的环形卡槽。其中，内引出件109形成为片状结构，该环形卡槽用于容纳内引出件109的外周缘，盖板绝缘件122与盖板110下表面贴合的基板128的下表面上的第二环形凸起130具有L型截面，以与基板128形成容纳内引出件的外周缘的环形卡槽。形成片状结构的内引出件109的边缘焊接区132位于中间焊接区131的外侧以卡入由第二卡接部形成的环形卡槽中。
一种电池盖板组件，包括盖板110、位于该盖板110内侧的内引出件109和位于该盖板110外侧的电极外端子112，所述内引出件109和所述电极外端子112通过电流中断装置电连接，所述电流中断装置包括刻痕件101和翻转件102，所述翻转件与所述电极外端子电连接，所述刻痕件与所述内引出件电连接，所述刻痕件上形成有刻痕104并与所述翻转件102电连接，所述翻转件102能够在气压作用下动作以拉断所述刻痕104，翻转件102拉断刻104后，内引出件109与电极外端子112断开电连接，所述内引出件109通过盖板绝缘件122安装在所述盖板110，所述盖板绝缘件122具有与所述盖板110卡接的第一卡接部125，所述盖板110上形成有用于安装所述电流中断装置的安装孔127，以及围绕该安装孔127形成的多个卡接孔134，所述盖板绝缘件122包括与所述盖板110下表面贴合的基板128，所述第一卡接部125包括从在所述基板128的上表面向上延伸穿过所述安装孔127后 向外翻折，并向下穿过所述卡接孔与所述基板128的卡套结构。
在一些实施例中，所述卡套结构包括环形凸起135和沿该环形凸起的周向间隔设置的多个连接柱136，所述环形凸起135具有L型截面以在穿过所述安装孔后向外翻折，所述连接柱穿过所述卡接孔134并连接在所述环形凸起135和所述基板128之间。
在一些实施例中，所述安装孔和所述环形凸起分别形成为沿所述盖板的长度方向延伸的长形结构，位于所述安装孔宽度方向两侧的所述连接柱136数量相同，且等间隔设置。
在一些实施例中，所述盖板绝缘件126还包括与所述内引出件109卡接的第二卡接部126。
在一些实施例中，所述第二卡接部126形成为环形卡槽，所述内引出件109形成为片状结构，该环形卡槽用于容纳所述内引出件109的外周缘。
在一些实施例中，所述第二卡接部126包括连接在所述基板128的下表面的第二环形凸起130，该第二环形凸起具有L型截面，以与所述基板128形成容纳所述内引出件的外周缘的环形卡槽。
在一些实施例中，所述内引出件109形成为片状结构，该片状结构具有与所述刻痕件101电连接的中间焊接区131和与电芯电连接的边缘焊接区132，所述边缘焊接区132位于所述中间焊接区131的外侧以卡入由所述第二卡接部形成的环形卡槽中。
在一些实施例中，所述边缘焊接区132的厚度大于等于所述中间焊接区131的厚度。
在一些实施例中，所述刻痕件101包括形成有刻痕104的刻痕区105、用于与所述翻转件102相互电连接的第一焊接区103以及用于与内引出件109电连接的第二焊接区107，所述刻痕区105形成为沿所述盖板110的长度方向延伸的长形结构，所述刻痕104沿该长形结构的长度方向延伸，并且所述第一焊接区和所述第二焊接区设置在所述刻痕区105高度方向的两侧并分别形成为沿所述盖板的长度方向延伸的长形结构，所述中间焊接区131对应地形成为长形结构。
在一些实施例中，所述中间焊接区131上形成有容纳所述第二焊接区107的容纳焊槽133。
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，内引出件109与电芯电连接，并且翻转件102与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 (14)

  1. 一种电池盖板组件，其特征在于，包括盖板(110)、位于该盖板(110)内侧的内引出件(109)和位于该盖板(110)外侧的电极外端子(112)，所述内引出件(109)和所述电极外端子(112)通过电流中断装置电连接，所述电流中断装置包括刻痕件(101)和翻转件(102)，所述翻转件与所述电极外端子电连接，所述刻痕件与所述内引出件电连接，所述刻痕件上形成有刻痕(104)并与所述翻转件(102)电连接，所述翻转件(102)能够在气压作用下动作以拉断所述刻痕(104)，所述内引出件通过盖板绝缘件(122)安装在所述盖板(110)，所述盖板绝缘件(122)具有与所述盖板(110)卡接的第一卡接部(125)，所述盖板(110)上形成有用于安装所述电流中断装置的安装孔(127)，以及围绕该安装孔(127)形成的多个卡接孔(134)，所述盖板绝缘件(122)包括与所述盖板(110)下表面贴合的基板(128)，所述第一卡接部(125)包括从在所述基板(128)的上表面向上延伸穿过所述安装孔(127)后向外翻折，并向下穿过所述卡接孔与所述基板(128)的卡套结构。
  2. 根据权利要求1所述的电池盖板组件，其特征在于，所述卡套结构包括环形凸起(135)和沿该环形凸起的周向间隔设置的多个连接柱(136)，所述环形凸起(135)具有L型截面以在穿过所述安装孔后向外翻折，所述连接柱穿过所述卡接孔(134)并连接在所述环形凸起(135)和所述基板(128)之间。
  3. 根据权利要求2所述的电池盖板组件，其特征在于，所述安装孔和所述环形凸起分别形成为沿所述盖板的长度方向延伸的长形结构，位于所述安装孔宽度方向两侧的所述连接柱(136)数量相同，且等间隔设置。
  4. 根据权利要求1-3中任一项所述的电池盖板组件，其特征在于，所述盖板绝缘件(126)还包括与所述内引出件(109)卡接的第二卡接部(126)。
  5. 根据权利要求4所述的电池盖板组件，其特征在于，所述第二卡接部(126)形成为环形卡槽，所述内引出件(109)形成为片状结构，该环形卡槽用于容纳所述内引出件(109)的外周缘。
  6. 根据权利要求5所述的电池盖板组件，其特征在于，所述第二卡接部(126)包括连接在所述基板(128)的下表面的第二环形凸起(130)，该第二环形凸起具有L型截面，以与所述基板(128)形成容纳所述内引出件的外周缘的环形卡槽。
  7. 根据权利要求6所述的电池盖板组件，其特征在于，所述内引出件(109)形成为片状结构，该片状结构具有与所述刻痕件(101)电连接的中间焊接区(131)和与电芯电连接的边缘焊接区(132)，所述边缘焊接区(132)位于所述中间焊接区(131)的外侧以 卡入由所述第二卡接部形成的环形卡槽中。
  8. 根据权利要求7所述的电池盖板组件，其特征在于，所述边缘焊接区(132)的厚度大于等于所述中间焊接区(131)的厚度。
  9. 根据权利要求7或8所述的电池盖板组件，其特征在于，所述刻痕件(101)包括形成有刻痕(104)的刻痕区(105)、用于与所述翻转件(102)相互电连接的第一焊接区(103)以及用于与内引出件(109)电连接的第二焊接区(107)，所述刻痕区(105)形成为沿所述盖板(110)的长度方向延伸的长形结构，所述刻痕(104)沿该长形结构的长度方向延伸，并且所述第一焊接区和所述第二焊接区设置在所述刻痕区(105)高度方向的两侧并分别形成为沿所述盖板的长度方向延伸的长形结构，所述中间焊接区(131)对应地形成为长形结构。
  10. 根据权利要求9所述的电池盖板组件，其特征在于，所述中间焊接区(131)上形成有容纳所述第二焊接区(107)的容纳焊槽(133)。
  11. 一种单体电池，其特征在于，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根据权利要求1-10中任意一项所述的电池盖板组件，所述内引出件(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。
  12. 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11所述的单体电池。
  13. 一种动力电池，其特征在于，包括包体和设置在该包体内的电池模组，所述电池模组为根据权利要求12所述的电池模组。
  14. 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13所述的动力电池。
PCT/CN2018/122113 2017-12-22 2018-12-19 电池盖板组件、单体电池、电池模组、动力电池及电动汽车 WO2019120224A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201721829033.2U CN207818749U (zh) 2017-12-22 2017-12-22 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN201721829033.2 2017-12-22

Publications (1)

Publication Number Publication Date
WO2019120224A1 true WO2019120224A1 (zh) 2019-06-27

Family

ID=63330382

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/122113 WO2019120224A1 (zh) 2017-12-22 2018-12-19 电池盖板组件、单体电池、电池模组、动力电池及电动汽车

Country Status (2)

Country Link
CN (1) CN207818749U (zh)
WO (1) WO2019120224A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116031527A (zh) * 2021-10-27 2023-04-28 宁德时代新能源科技股份有限公司 一种电池箱体、压接装置及电池箱体制造方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207818749U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818641U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN109962204B (zh) * 2017-12-22 2020-12-25 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818642U (zh) 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN109962203A (zh) * 2017-12-22 2019-07-02 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
US11826861B1 (en) * 2020-08-12 2023-11-28 Sion Power Corporation Joining systems, clamping fixtures, and related systems and methods

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1217826A (zh) * 1996-03-04 1999-05-26 波利斯托尔公司 具有脆性连接片断路机构的电池输出端组件
CN103700896A (zh) * 2012-09-27 2014-04-02 丰田自动车株式会社 密闭型电池
US20160190657A1 (en) * 2013-07-30 2016-06-30 Kabushiki Kaisha Toyota Jidoshokki Current interruption device and electricity storage device using the current interruption device
CN105870366A (zh) * 2016-06-07 2016-08-17 宁德时代新能源科技股份有限公司 动力电池顶盖及动力电池
CN107123756A (zh) * 2016-02-25 2017-09-01 比亚迪股份有限公司 电流中断装置、单体电池、电池模组、动力电池及电动汽车
CN207818749U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818643U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818641U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818642U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1217826A (zh) * 1996-03-04 1999-05-26 波利斯托尔公司 具有脆性连接片断路机构的电池输出端组件
CN103700896A (zh) * 2012-09-27 2014-04-02 丰田自动车株式会社 密闭型电池
US20160190657A1 (en) * 2013-07-30 2016-06-30 Kabushiki Kaisha Toyota Jidoshokki Current interruption device and electricity storage device using the current interruption device
CN107123756A (zh) * 2016-02-25 2017-09-01 比亚迪股份有限公司 电流中断装置、单体电池、电池模组、动力电池及电动汽车
CN105870366A (zh) * 2016-06-07 2016-08-17 宁德时代新能源科技股份有限公司 动力电池顶盖及动力电池
CN207818749U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818643U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818641U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
CN207818642U (zh) * 2017-12-22 2018-09-04 比亚迪股份有限公司 电池盖板组件、单体电池、电池模组、动力电池及电动汽车

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116031527A (zh) * 2021-10-27 2023-04-28 宁德时代新能源科技股份有限公司 一种电池箱体、压接装置及电池箱体制造方法
CN116031527B (zh) * 2021-10-27 2024-01-16 宁德时代新能源科技股份有限公司 一种电池箱体、压接装置及电池箱体制造方法

Also Published As

Publication number Publication date
CN207818749U (zh) 2018-09-04

Similar Documents

Publication Publication Date Title
WO2019120225A1 (zh) 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
WO2019120224A1 (zh) 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
WO2019120272A1 (zh) 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
KR101182284B1 (ko) 이차 전지
KR101036070B1 (ko) 이차 전지
JP4558671B2 (ja) 二次電池
EP2597705B1 (en) Rechargeable battery
WO2019114775A1 (zh) 电池盖板组件、单体电池、电池模组、动力电池及电动汽车
JP2010267615A (ja) 二次電池
JP2004319463A (ja) 二次電池
KR100443775B1 (ko) 전지용 압력차단센서
KR100861714B1 (ko) 리벳을 이용한 무용접 방식의 전지팩
KR100930473B1 (ko) 억지끼움 결합 방식의 리벳을 이용한 무용접 방식의 전지팩
WO2019120236A1 (zh) 盖板组件、单体电池、电池模组、动力电池及电动汽车
KR100496302B1 (ko) 안전벤트를 가지는 각형 리튬 이차 전지
KR20070075938A (ko) 무용접 체결 방식의 전지팩
JPH1173941A (ja) 電池の安全装置
WO2019114776A1 (zh) 电池系统及电动汽车
WO2019120238A1 (zh) 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) 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
EP4037073A1 (en) Secondary battery
KR20080036740A (ko) 이차전지
KR20030033594A (ko) 각형 이차전지
WO2019114772A1 (zh) 电流中断装置及其刻痕件、电池盖板组件、单体电池、电池模组、动力电池及电动汽车
EP2339662B1 (en) Secondary battery

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: 18891155

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: 18891155

Country of ref document: EP

Kind code of ref document: A1