WO2019114772A1

WO2019114772A1 - Current interruption device and notched member thereof, battery cover plate assembly, battery cell, battery module, power battery and electric vehicle

Info

Publication number: WO2019114772A1
Application number: PCT/CN2018/120763
Authority: WO
Inventors: 蒋露霞; 王飞飞; 汤道毅; 程晗; 朱建华
Original assignee: 比亚迪股份有限公司
Priority date: 2017-12-13
Filing date: 2018-12-13
Publication date: 2019-06-20
Also published as: CN109920965A

Abstract

A current interruption device and a notched member thereof, a battery cover plate assembly, a battery cell, a battery module, a power battery and an electric vehicle. The notched member comprises a notched area having a notch, a first weld area for electrically connecting to a flip member, and a second weld area for electrically connecting to an inner terminal of an electrode, the flip member being capable of moving under air pressure to disconnect from the notched member by breaking the notch, the notch being provided around the first welding area, and at least one of the first weld area and the second weld area being provided on a surface different from that of the notch.

Description

Current interrupting device and its scoring member, battery cover assembly, single battery, battery module, power battery and electric vehicle

Cross-reference to related applications

This application claims BYD Co., Ltd. on December 13, 2017, the invention name is "current interruption device and its scoring parts, battery cover assembly, single battery, battery module, power battery and electric vehicle" The priority of the Chinese Patent Application No. 201711332874.7, the entire contents of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of batteries, and relates to a current interrupting device and a scoring member thereof, a battery cover assembly using the current interrupting device, a single 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.

Background technique

As an energy storage unit, the battery plays an important role in various industries. For example, the power battery is widely used in the field of new energy vehicles. 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.

In the related art, 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. However, there are also deficiencies, such as 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.

Therefore, it is of positive significance to provide a current interruption technique capable of forcibly turning off the charge and discharge circuit itself.

Summary of the invention

An object of the present disclosure is to provide a current interrupting device and a scoring 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 group uses the power battery of the battery module and the vehicle using the power battery.

In order to achieve the above object, the present disclosure provides a scoring member for a current interrupting device, the scoring member including a scoring region formed with a score, a first land for electrically connecting to the flip member, and a counter electrode a second soldering region electrically connected to the inner terminal, the flip member being capable of acting under the action of air pressure to break the score, the score being disposed around the first soldering region, and the first soldering region At least one of the second weld zones is disposed opposite the score.

In some embodiments, the score is disposed opposite the first weld zone and the second weld zone.

In some embodiments, the indentation member includes a boss projecting from the scored region, the first land is formed on the boss, and the score is formed on the score region And disposed around the boss.

In some embodiments, the first land is formed by the upper surface of the boss and parallel to the scored region, and the outer periphery of the upper surface is provided with a ring-shaped solder joint.

In some embodiments, an outer circumference of the score region is formed with a ring wall that protrudes in the same direction as the boss, and the second land is formed on an outer circumference of the ring wall and the boss The upper edges are aligned in the height direction.

In some embodiments, the second weld zone, the scored zone, and the first weld zone are arranged in a radial direction from the outside to the inside, and are formed from the outside to the inside to gradually approach the stepped structure of the flip member, The score is disposed around the first weld zone.

In some embodiments, 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.

In some embodiments, the side walls of the boss and the ring wall are perpendicular to the scored area, respectively.

In some embodiments, the first weld zone, the score zone, and the second weld zone are each formed in a ring structure.

The present disclosure also provides a current interrupting device comprising a score member and a flip member, the score member being a score member provided by the disclosure, the score member passing through the first weld zone and the flip member Electrical connection.

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.

In some embodiments, 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.

In some embodiments, 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 within the housing, and a battery cover assembly enclosing the housing, wherein the battery cover assembly is provided for the present disclosure The battery cover assembly is electrically connected to the battery core and the inverting member is in gas communication with the interior of the housing.

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.

According to the above technical solution, since the score on the scored member and the other two weld zones are not in the same plane and constitute the step structure, the external force transmitted from the reverse member and the terminal in the electrode can be effectively eliminated on the scored member. The mechanical impact of the notch can also eliminate the thermal influence of the welding stress of the two weld zones on the area where the score is located, and improve the reliability of the current interruption device.

Other features and advantages of the present disclosure will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the disclosure, and are in the In the drawing:

1 is a partially exploded perspective view of a battery module in an exemplary embodiment of the present disclosure;

2 is a cross-sectional view of a current interrupting device in a first exemplary embodiment of the present disclosure;

3 is a cross-sectional view of a current interrupting device in a second exemplary embodiment of the present disclosure.

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.

Detailed ways

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are not to be construed

In the present disclosure, the 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.

As shown in FIG. 1 to FIG. 6 , 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. The battery module of the unit battery, the power battery of the battery module, and the technical solution of the vehicle using the power battery. As shown in FIG. 1, 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. Among them, in the single cell, 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. In addition, in addition to the field of power batteries, various technical solutions provided in the present disclosure can be widely applied to other battery fields. In some embodiments, 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.

First, as shown in FIG. 1 and FIG. 2 or FIG. 3, each embodiment of the present disclosure provides a battery module including a plurality of single cells, wherein the single battery may include a housing 111 and is housed in the housing. A battery cell, an electrode inner terminal 109 electrically connected to the battery core, and a cover plate 110 of the package housing 111, wherein the electrode outer terminal 112 is disposed on the cover plate for performing current input and output 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 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. At the time of charging, 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.

In the present disclosure, the current interrupting devices in the various embodiments are all mechanical structures that sense air pressure. In some embodiments, 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.

Taking the embodiment as described in FIGS. 2 to 3 as an example, 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 is capable of breaking the electrical connection under the action of air pressure. In an embodiment of the present disclosure, 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, In some embodiments, 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.

In this way, it is considered that since the current to be passed is large in the field of, for example, a power battery, it is necessary to ensure that the welded structure of the score member 101 and the flip member 102 is stable, and a large current fuse welded structure is avoided. Thus, by the arrangement of the scores 104 of the scoring member 101, that is, the weak portions having a lower strength than the other regions are processed in the corresponding portions, the complete disconnection of the scoring member 101 and the flip member 102 can be completed, and the scoring is usually around the scoring. The weld zone of the piece and the flip piece is set to ensure complete disconnection of the two.

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.

As shown in 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. In the present disclosure, the score 104 surrounds the first land. 103, the score 104 may be an annular shape surrounding the first weld zone 103 and 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 around the first land 103 can be broken under the action of the internal 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.

As shown in FIGS. 3 and 4, in the second embodiment, the score 104 is simultaneously disposed opposite the first land 103 and the second land 107, and in some embodiments, the second land 107, the score The region 105, the first lands 103 are arranged in the radial direction from the outside to the inside, and are formed from the outside to the inside to gradually approach the step structure of the flip member 102, and the second lands 107 are also different from the score region 105, and the three components are formed. The step structure has a buffering function, which can avoid the thermal influence of the welding stress of the two welding zones on the notch 104, and can also buffer the external force transmitted from the terminal inside the electrode, so that the current interruption device is more reliable.

In two embodiments of the present disclosure, as shown in FIG. 2 or FIG. 3, the scoring member 101 includes a boss 106 projecting from the score region 105, and a first land 103 is formed on the boss 106 to form A score 104 on the scored area 105 is disposed around the boss 106. Thereby achieving the different faces of the regions in which they are located, in some embodiments, 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 . Correspondingly, the first connection region 115 on the flip member 102 may be formed to receive the connection hole of the boss 106. Thereby, the outer peripheral edge of the boss and the inner wall of the connecting hole are firmly welded by the annular joint. 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. .

As shown in FIG. 2, in the first embodiment, in order to electrically connect with the electrode inner terminal 109 of the battery, generally, the top end of the electrode inner terminal 109 is provided with a receiving groove. For this purpose, the outer peripheral edge of the scored area 105 is formed with a boss. In the same direction, 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.

As shown in FIG. 3, in the second embodiment, 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. In some embodiments, 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. Wherein 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.

In the second embodiment, as shown in FIG. 3, the side walls of the boss and the ring wall 108 are perpendicular to the scored area 105, respectively, and may be angled in other embodiments, for example, forming a zigzag type step. In addition, 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.

Wherein, as shown in FIG. 2 to FIG. 5, 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. As shown in FIG. 2 and FIG. 5, in addition, 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.

In the two embodiments of the present disclosure, the inverting member 102 is formed into a tapered sheet-like structure, and the tapered small end is formed as a first connecting portion 115, and the large end is away from the incision member 101 and formed into a second portion. 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. In other possible embodiments, the flip member may also be a flat member having elasticity or the like.

As shown in FIGS. 2 and 5, the deformation buffer 117 in the present disclosure is formed as an annular groove structure surrounding the first connection region 115. Thus, under the action of an external force, the deformation buffer can be achieved by the relative movement between the groove walls of the annular groove. In other possible embodiments, the deformation buffer 117 can also be realized by a structure such as a deformation chamber or an elastic material.

As shown in FIGS. 2 and 5, in the first embodiment, the annular groove structure has an arcuate cross section, for example, a semicircular shape that protrudes toward the electrode outer terminal 112. Thus, 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. In other possible embodiments, 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.

As shown in FIG. 3, in the second embodiment, in the second embodiment, the boss 106 of the score member 101 protrudes from the receiving groove of the terminal inside the electrode.

As shown in FIG. 2 and FIG. 3, in the two embodiments of the present disclosure, in order to ensure that the gas inside the battery can be actuated, 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. In order to enable the flipper 102 to operate normally, 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 preventing the flipper 102 from being prevented from acting under the action of air pressure. In addition, in the two embodiments in which the cover plate 110 is charged and insulated, 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. In some embodiments, 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 provided by the present disclosure 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. In some embodiments, 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. In order to avoid the charging of the cover plate 110, 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. In addition, in order to ensure that the gas inside the battery can act on the flip member 102, 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.

A scoring member for a current interrupting device, the scoring member 101 comprising a scored region 105 formed with a score 104, a first land 103 for electrically interconnecting the flip member 102, and a terminal for use with the electrode 109 electrically connected second pad 107, the flip member 102 can act under the action of air pressure to break the score 104, and the flip member 102 can be disconnected from the electrode terminal 109 after the score 104 is broken. Connected, the score 104 surrounds the first land 103, and at least one of the first land 103 and the second land 107 is disposed opposite the score 104.

In some embodiments, the score 104 is disposed opposite the first land 103 and the second land 107.

In some embodiments, the score member 101 includes a boss 106 projecting from the scored region 105, the first land 103 being formed on the boss 106, the score 104 being formed in The scored area 105 is disposed on and around the boss 106.

In some embodiments, the first land 103 is formed by the upper surface of the boss 106 and parallel to the score region, and the outer periphery of the upper surface is provided with a ring-shaped solder joint.

In some embodiments, the outer periphery of the scored region 105 is formed with a ring wall 108 that projects in the same direction as the boss 106, and the second land 107 is formed on the outer periphery of the ring wall 108 and The upper edge of the boss 106 is aligned in the height direction.

In some embodiments, the second land 107, the scored region 105, and the first land 103 are sequentially arranged from the outside to the inside in the radial direction, and are formed from the outside to the inside to gradually approach the flip member 102. The step structure 104 is disposed around the first land 103.

In some embodiments, 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.

In some embodiments, the sidewalls of the boss 106 and the ring wall 108 are perpendicular to the scored region 105, respectively.

In some embodiments, the first land 103, the scored region 105, and the second land 107 are each formed in a ring structure.

A current interrupting device comprising a scoring member 101 and a flip member 102, wherein the scoring member 101 is any of the scoring members 101 described above, and the scoring member 101 passes through the first lands 103 and The flip members 102 are electrically connected to each other.

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.

In some embodiments, 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.

In some embodiments, 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 In the assembly, the electrode inner terminal 109 is electrically connected to the battery cell, and 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.

The five embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical idea of the present disclosure. These simple variations are all within the scope of the disclosure.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure is applicable to various possibilities. The combination method will not be described separately.

In addition, any combination of various embodiments of the present disclosure may be made as long as it does not deviate from the idea of the present disclosure, and should also be regarded as the disclosure of the present disclosure.

Claims

A scoring member for a current interrupting device, characterized in that the scoring member (101) comprises a scored area (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 terminal (109), the flip member (102) being capable of acting under air pressure to break the score (104) The scoring (104) is disposed around the first lands (103), and at least one of the first lands (103), the second lands (107) and the nicks (104) Different settings.
The scoring member according to claim 1, wherein the score (104) is disposed opposite the first weld zone (103) and the second weld zone (107).
The scoring member according to claim 2, wherein said scoring member (101) includes a boss (106) projecting from said score region (105), said first land (103) Formed on the boss (106), the score (104) is formed on the score region (105) and disposed around the boss (106).
The scoring member according to claim 3, wherein said first land (103) is formed by an upper surface of said boss (106) and parallel to said score region, and a periphery of said upper surface The edge is provided with a ring weld.
The scoring member according to claim 4, wherein an outer peripheral edge of the scoring area (105) is formed with a ring wall (108) protruding in the same direction as the boss (106), A second weld zone (107) is formed on the outer periphery of the ring wall (108) and is aligned in the height direction with the upper edge of the boss (106).
The scoring member according to any one of claims 1 to 5, wherein the second land (107), the scored area (105), and the first land (103) are along The radial direction is arranged in order from the outside to the inside, and is formed from the outside to the inside as a stepped structure gradually approaching the flip member (102), the scoring (104) being disposed around the first land (103).
The scoring member according to claim 6, wherein an outer peripheral edge of the scoring region (105) is formed with a ring wall (108) protruding in a reverse direction from the boss, the second land (107) is formed on an outer circumference of the ring wall (108) and parallel to the score area (105), and an outer circumference of the second land (107) is formed with a ring-shaped pad.
The scoring member according to claim 7, wherein the side wall of the boss (106) and the ring wall (108) are perpendicular to the scored area (105), respectively.
The scoring member according to any one of claims 1-8, wherein the first weld zone (103), the score zone (105) and the second weld zone (107) respectively Formed as a ring structure.
A current interruption device comprising a score member (101) and a flip member (102), characterized in that the score member (101) is a score member according to any one of claims 1-9 ( 101) The scoring member (101) is electrically connected to the flip member (102) through the first land (103).
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), wherein the electrode is inside the electrode The terminal (109) and the electrode outer terminal (112) are electrically connected by a current interrupting device, wherein the current interrupting device is the current interrupting device according to claim 10, and the electrode outer terminal (112) is The flip member (102) is electrically connected, and the score member (101) is electrically connected to the electrode inner terminal (109).
The battery cover assembly according to claim 11, wherein 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 electrode The outer periphery of the outer terminal (112) is electrically connected to the upper side of the outer periphery of the flip member (102).
The battery cover assembly according to claim 12, wherein an inner wall of the support ring (113) is formed with a support flange (114), the flip member (102) and the electrode outer terminal (112) The outer periphery 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, wherein the battery cover assembly is according to claim 12. Or the battery cover assembly of claim 13, wherein the electrode inner terminal (109) is electrically connected to the battery core, and the turning member (102) is in gas communication with the interior of the outer casing.
A battery module characterized in that the battery module is provided with the unit battery according to claim 14.
A power battery includes a package body and a battery module disposed in the package body, wherein the battery module is the battery module according to claim 15.
An electric vehicle characterized in that the electric vehicle is provided with the power battery according to claim 16.