CN207690844U - Cap assembly, secondary cell and automobile - Google Patents

Abstract

This application involves a kind of energy storage device technical field more particularly to cap assembly of secondary cell, secondary cell and automobiles.Cap assembly includes：Head cover；Collector, the collector is set to below the head cover, including terminal connection part, the contracting shoulder dilatation portion connecting, the transition connection portion being connect with the contracting shoulder dilatation portion and the electrode connecting portion being arranged with transition connection portion overhanging is inside contracted with the terminal connection part；Insulating part, the insulating part are set between the head cover and the contracting shoulder dilatation portion；Along the length direction of the head cover, the transition connection portion is overhanging relative to the contracting shoulder dilatation portion, and stretches out the insulating part.The application can make full use of the confined space inside secondary cell, improve the energy density of secondary cell.

Description

Cap assembly, secondary cell and automobile

Technical field

This application involves a kind of energy storage device technical field more particularly to cap assembly, secondary cell and automobiles.

Background technology

Secondary cell is widely used in mobile phone, laptop due to energy density height, advantages of environment protection Equal electronic devices.In recent years, for response environment problem, gas price problem and energy stores problem, secondary cell is answered With Quick Extended to hybrid electric vehicle, electric vehicle and energy storage system.It is existing with the development of electric vehicle The energy density of secondary cell cannot be satisfied requirement.

Utility model content

This application provides a kind of cap assembly, secondary cell and automobiles, can solve the above problems.

The first aspect of the application provides a kind of cap assembly of secondary cell, including：

Head cover；

Collector, the collector are set to below the head cover, including in terminal connection part and the terminal connection part Contract the contracting shoulder dilatation portion of connection, the transition connection portion that is connect with the contracting shoulder dilatation portion and with transition connection portion overhanging setting Electrode connecting portion；

Insulating part, the insulating part are set between the head cover and the contracting shoulder dilatation portion；

Along the length direction of the head cover, the transition connection portion is overhanging relative to the contracting shoulder dilatation portion, and stretches out institute State insulating part.

Optionally, the contracting shoulder dilatation portion is to be bent in an arc shape structure.

Optionally, the insulating part is disposed proximate to the contracting shoulder dilatation portion.

Optionally, the part of the width in the contracting shoulder dilatation portion and the transition connection portion close to the contracting shoulder dilatation portion Width, the maximum width of the respectively less than described terminal connection part, the width refer to the ruler of the thickness direction along the secondary cell It is very little.

Optionally, along the thickness direction of the secondary cell, portion of the transition connection portion close to the contracting shoulder dilatation portion Dividing tool, there are two opposite sides, and at least one side is provided with anti-tear notch.

Optionally, the side is provided with the anti-tear notch close to one end of the electrode connecting portion, this is anti-tear The inner wall of notch and the electrode connecting portion are tangent.

Optionally, the side is provided with the anti-tear notch close to the one end in the contracting shoulder dilatation portion.

Optionally, it is provided with flange part above the collector and is connected to the trunk portion of the flange part；

The terminal connection part is equipped with mounting hole, and one end of the trunk portion coordinates with mounting hole inserting, the other end Stretch out the head cover；The flange part pressure is set to one side of the terminal connection part close to the head cover.

Optionally, the insulating part includes：

First parcel, first parcel are set between the flange part and the head cover, and are wrapped up described convex Edge is close to the side of the one side and the flange part of the head cover；

Second parcel, second parcel are set between the terminal connection part and the head cover, and wrap up institute Terminal connection part is stated close to the side of the one side and the terminal connection part of the head cover.

Optionally, second parcel wraps up the part of one side of the terminal connection part close to the head cover, with institute State between terminal connection part that there are gaps.

Optionally, the insulating part further includes extension, and the extension is connect with first parcel, the extension Portion is set between the head cover and the trunk portion.

Optionally, in first parcel and the flange part, one is provided with the first limiting slot, and another one is provided with First limit protrusion, first limiting slot coordinate with first limit protrusion.

Optionally, the insulating part is additionally provided with the second limit protrusion, and the head cover is provided with the second limiting groove, described Second limit protrusion coordinates with second limiting groove.

The second aspect of the application provides a kind of secondary cell, including：

Shell is used for accommodate electrod component；

Any one of them cap assembly as above, the top seal is in the top of the shell；

The transition connection portion is overhanging relative to the contracting shoulder dilatation portion and close to the shell.

The third aspect of the application provides a kind of automobile, including secondary cell as described above.

Technical solution provided by the present application can reach following advantageous effect：

Cap assembly provided herein, collector include sequentially connected terminal connection part, contracting shoulder dilatation portion, transition Interconnecting piece and electrode connecting portion make insulating part be set at contracting shoulder dilatation portion, by head cover and collection by the way that contracting shoulder dilatation portion is arranged Electric body insulation, the structure can make full use of the confined space inside secondary cell, improve the energy density of secondary cell；And Transition connection portion is set compared with insulating part closer to shell, in this way, the region inside secondary cell near head cover is formed more Big space enables the space to accommodate the electrode assembly of bigger, to improve the energy density of secondary cell.

It should be understood that above general description and following detailed description is merely exemplary, this can not be limited Application.

Description of the drawings

Fig. 1 is a kind of structural schematic diagram of the secondary cell of specific embodiment provided herein；

Fig. 2 is a kind of explosive view of the secondary cell of specific embodiment provided herein；

Fig. 3 is a kind of sectional view of the cap assembly of specific embodiment in secondary cell provided herein；

Fig. 4 is a kind of explosive view of the cap assembly of specific embodiment in secondary cell provided herein；

Fig. 5 is the partial enlarged view at I in Fig. 3；

Fig. 6 is a kind of structural schematic diagram of the collector of specific embodiment in secondary cell provided herein；

Fig. 7 is a kind of front view of the collector of specific embodiment in secondary cell provided herein.

Reference numeral：

100- cap assemblies；

110- head covers；

111- explosionproof holes；

112- liquid injection holes；

113- explosion-proof valves；

The first link blocks of 120-；

121 first separators；

122- rotating sheets；

The second link blocks of 130-；

The second separators of 131-；

132- sealing insulators；

The first collectors of 140-；

141- terminal connection parts；

142- contracting shoulder dilatations portion；

The sides 1421-；

143- transition connection portions；

144- electrode connecting portions；

The anti-tear notches of 145-；

146- mounting holes；

The first insulating parts of 150-；

The first parcels of 151-；

The second parcels of 152-；

153- extensions；

The second limit protrusions of 154-；

The first poles of 160-；

161- trunk portions；

162- flange parts；

The second insulating parts of 170-；

171- fuse protection components；

The second poles of 180-；

The second collectors of 190-；

191- fuse part；

200- shells；

300- electrode assemblies；

310- lugs；

400- insulating films.

The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application Example, and the principle together with specification for explaining the application.

Specific implementation mode

It is described in further detail below by specific embodiment and in conjunction with attached drawing to the application.

As shown in Figs. 1-2, the embodiment of the present application provides a kind of secondary cell, including shell 200 and cap assembly 100, Shell 200 is used for accommodate electrod component 300, and cap assembly 100 is installed on shell 200.

Cap assembly 100 includes head cover 110, collector (such as the first collector 140) and insulating part (such as the first insulating part 150), as shown in fig. 3 to 7, collector is used for connection electrode component 300 and pole, collector (such as the first collector 140) setting In the lower section of head cover 110, including terminal connection part 141, the contracting shoulder dilatation portion 142 connecting and contracting shoulder are inside contracted with terminal connection part 141 The electrode connecting portion 144 of transition connection portion 143 and the setting that overhangs with transition connection portion 143 that dilatation portion 142 connects, terminal connection Portion 141 with pole for connecting, and electrode connecting portion 144 with electrode assembly 300 for connecting, that is to say, that contracting shoulder dilatation portion 142 It concaves, i.e., is recessed to the inner space of shell 200 compared with terminal connection part 141, transition connection portion 143.Insulating part (such as first Insulating part 150) it is set between head cover 110 and contracting shoulder dilatation portion 142, i.e., insulating part (such as the first insulating part 150) is located at head cover Between 110 and collector (such as the first collector 140).And along the length direction X of head cover 110, transition connection portion 143 is relative to contracting Shoulder dilatation portion 142 is overhanging, and stretches out insulating part (such as the first insulating part 150), i.e., along above-mentioned length direction X, transition connection portion 143 It is overhanging relative to insulating part (such as the first insulating part 150), when cap assembly 100 is installed on shell 200, along above-mentioned length direction X (i.e. the length direction of secondary cell) transition connection portions 143 are overhanging relative to contracting shoulder dilatation portion 142 and close to shell 200, head cover 110 are sealed in the top of shell 200, and collector (such as the first collector 140) and insulating part (such as the first insulating part 150) are respectively positioned on In the space that shell 200 is surrounded with head cover 110, electrode assembly 300 is contained in the space.

In above-mentioned cap assembly 100, collector includes sequentially connected terminal connection part 141, contracting shoulder dilatation portion 142, mistake Interconnecting piece 143 and electrode connecting portion 144 are crossed, by the way that contracting shoulder dilatation portion 142 is arranged, insulating part is made to be set to contracting shoulder dilatation portion 142 Head cover 110 and collector are insulated in place, and since contracting shoulder dilatation portion 142 forms depressed area, insulating part can be abundant Using the space of the depressed area, makes the utilization rate higher of the confined space inside secondary cell, improve the energy of secondary cell Density；Meanwhile transition connection portion 143 compared with insulating part closer to shell 200, in this way, inside secondary cell close to head cover 110 it is attached Close region forms the space of bigger, so that the space is accommodated the electrode assembly 300 of bigger, to further increase secondary cell Energy density.

Wherein, collector (such as the first collector 140) can be an integral structure, terminal connection part 141, contracting shoulder dilatation portion 142, transition connection portion 143 and electrode connecting portion 144 pass through bending forming.Usually, the lug 310 of electrode assembly 300 along Above-mentioned length direction X extends, in order to increase the contact area of lug 310 and electrode connecting portion 144, electrode connecting portion 144 and mistake It is in a non-zero included angle to cross interconnecting piece 143, that is to say, that there is transition connection portion 143 first extended surface, electrode connecting portion 144 to have There is the second extended surface, the first extended surface and the second extended surface are in a non-zero included angle, which can be right angle.

Specifically, terminal connection part 141 can be slab construction, and contracting shoulder dilatation portion 142 is relative to the terminal connection part 141 Bending forming, and extend to the direction far from terminal connection part 141；Transition connection portion 143 is also slab construction, with contracting shoulder dilatation Side connection of the portion 142 far from the terminal connection part 141, and be in a non-zero included angle, electrode connecting portion with terminal connection part 141 144 can be stripe board shape structure, and overhanging from transition connection portion 143 to the direction far from the terminal connection part 141 is arranged, And electrode connecting portion 144 is in a non-zero included angle with terminal connection part 141, transition connection portion 143.In a kind of embodiment, terminal Interconnecting piece 141, transition connection portion 143 and 144 three of electrode connecting portion are mutually perpendicular to two-by-two.

With reference to figure 5-7, contracting shoulder dilatation portion 142 is in bending structure, and specifically, contracting shoulder dilatation portion 142 is to be bent in an arc shape structure, It is that arc-shaped transition is connect with terminal connection part 141, transition connection portion 143, especially at collector (such as the first collector 140) When passing through bending forming, the stress inside collector can be alleviated；And this bending structure is used, collector entirety can be improved Intensity.

As described above, collector (such as the first collector 140) forms bending structure in many places, in order to further alleviate bending When stress, and prevent from cracking everywhere in collector (such as the first collector 140) after bending being even broken, contracting shoulder dilatation The width and transition connection portion 143 in portion 142 are close to the width D 2 of the part in contracting shoulder dilatation portion 142, respectively less than terminal connection part 141 Maximum width D1, wherein above-mentioned width refers to the size of the thickness direction Y along secondary cell.In view of terminal connection part 141 Bending structure is also formed between contracting shoulder dilatation portion 142, therefore, terminal connection part 141 is close to the one end for reducing dilatation portion 142 Width D 3 is small compared with the width D 1 of the other end, to alleviate the stress at this.

Further, along the thickness direction Y of secondary cell, part tool of the transition connection portion 143 close to contracting shoulder dilatation portion 142 There are two opposite side 1421, at least one side 1421 is provided with anti-tear notch 145, i.e. anti-tear notch 145 can be with It is recessed to another side 1421 by a part for a side 1421 and is formed, by the way that anti-tear notch 145 is arranged, transition is made to connect Stress at socket part 143 is equalized, and even fracture is cracked everywhere to be better protected from transition connection portion 143.It is preferred that Ground, two sides 1421 are both provided with anti-tear notch 145, to further avoid the stress concentration at transition connection portion 143.It needs It is noted that one, two or more anti-tear notch 145 can be arranged in each side 1421.

Since transition connection portion 143 and electrode connecting portion 144 form bending structure, the junction of the two can be caused to answer Power is more concentrated, for this purpose, in one embodiment of the application, the side 1421 of transition connection portion 143 is close to electrode connecting portion 144 One end is provided with anti-tear notch 145, and the inner wall of the anti-tear notch 145 and electrode connecting portion 144 are tangent, as shown in fig. 6, Seamlessly transitted by anti-tear notch 145 and the end of electrode connecting portion 144, can further alleviate transition connection portion 143 with The stress of 144 junction of electrode connecting portion, and the stress of entire collector can obtain preferably equilibrium.

In view of contracting shoulder dilatation portion 142 itself is bent with many places, and the junction of itself and transition connection portion 143 is also formed Bending structure, therefore, the side 1421 of transition connection portion 143 are provided with anti-tear notch close to the one end in contracting shoulder dilatation portion 142 145, to alleviate the stress at this, improve the intensity of entire collector.

It is provided with flange part 162 above collector (such as the first collector 140) and is connected to the trunk portion of flange part 162 161, that is to say, that cap assembly 100 further includes pole (such as the first pole 160), and pole (such as the first pole 160) includes mutual The flange part 162 and trunk portion 161 of connection, flange part 162 are set to the periphery of trunk portion 161.Terminal connection part 141 is equipped with peace Hole 146 is filled, one end and the inserting of mounting hole 146 of trunk portion 161 coordinate, and the other end stretches out head cover 110；The pressure of flange part 162 is set to Terminal connection part 141 is coordinated by the inserting of trunk portion 161 and mounting hole 146 close to the one side of head cover 110, can improve pole The positioning accuracy of column (such as the first pole 160) and collector (such as the first collector 140)；And connected by flange part 162 and terminal The overlap joint of socket part 141 connects, and increases the contact area of pole (such as the first pole 160) and terminal connection part 141, increases two The reliability of person's connection；Meanwhile terminal connection part 141 plays the role of support to pole (such as the first pole 160), prevent its by Sink in gravity.

In a kind of embodiment, insulating part (such as the first insulating part 150) is disposed proximate to contracting shoulder dilatation portion 142, i.e. insulating part Other components are not provided between (such as the first insulating part 150) and contracting shoulder dilatation portion 142, to reduce insulating part (such as the first insulating part 150) with the occupied space of collector (such as the first collector 140) combination, the space availability ratio of secondary cell is further increased, with And improve the insulating properties of collector (such as the first collector 140) and head cover 110.Optionally, insulating part (such as the first insulating part 150) It is bonded with contracting shoulder dilatation portion 142, as shown in figure 5, collector (such as the first collector 140) and head cover 110 is preferably isolated.

Specifically, as illustrated in figures 4-5, insulating part (such as the first insulating part 150) and pole (such as the first pole 160) can be adopted It is arranged with following manner, insulating part (such as the first insulating part 150) includes the first parcel 151 and the second parcel 152, the first packet It wraps up in portion 151 to be set between flange part 162 and head cover 110, and wraps up one side and flange part of the flange part 162 close to head cover 110 162 side, that is to say, that flange part 162 includes close to the top surface of head cover 110 and the side being connect with top surface, the first package Wrap up the top surface and side of flange part 162 in portion 151.Second parcel 152 is set between terminal connection part 141 and head cover 110, And package terminal connection part 141 is close to the side of the one side and terminal connection part 141 of head cover 110, that is to say, that terminal connection part 141 include close to the top surface of head cover 110 and connecting the side of the top surface, flange part 162 not with the entire top of terminal connection part 141 Face paste is closed, and the second parcel is provided between the part and head cover 110 of the top surface exposing flange part 162 of terminal connection part 141 152, and the second parcel 152 wraps up the part and side of the top surface exposing flange part 162 of terminal connection part 141 simultaneously.Using Above structure, insulating part (such as the first insulating part 150) wrap up entire flange part 162 and terminal connection part 141, therefore, energy Enough further increase pole (such as the first pole 160), collector (such as the first collector 140) especially terminal connection part 141 with The insulating properties of head cover 110.

Wherein, the second parcel 152 is also provided at contracting shoulder dilatation portion 142 close to the side of shell 200, i.e., in insulating part When (such as the first insulating part 150) is bonded with contracting shoulder dilatation portion 142, it is bonded with contracting shoulder dilatation portion 142 by the second parcel 152.

Second parcel 152 wraps up terminal connection part 141 close to the part of the one side of head cover 110, with terminal connection part 141 Between there are gap, with reference to figure 5, hierarchic structure is formd in flange part 162 and terminal connection part 141, using this structure, When first parcel 151 is bonded with flange part 162, the second parcel 152 can be prevented due to occurring to squeeze with terminal connection part 141 Pressure causes excessive deformation, and influences the service life of insulating part (such as the first insulating part 150).

Optionally, the first parcel 151 wraps up flange part 162 close to the part of head cover 110 and head cover 110, flange part 162 It is bonded, the part of the side of the first parcel 151 package flange part 162 is also bonded with the side of flange part 162；Second package The part and the top surface of head cover 110, terminal connection part 141 of the top surface of the package terminal connection part 141 of portion 152 are spaced, the Two parcels 152 wrap up the part of the side of terminal connection part 141 and the side of terminal connection part 141, contracting shoulder dilatation portion 142 Fitting to further increase the energy density of secondary cell, and ensures the insulation of pole, collector and head cover 110, shell 200 Property.

Insulating part (such as the first insulating part 150) further includes extension 153, and extension 153 is connect with the first parcel 151, Extension 153 is set between head cover 110 and trunk portion 161.Since trunk portion 161 is needed across head cover 110, in order to Ensure the insulating properties between trunk portion 161 and head cover 110, needs that insulation system is arranged therebetween, and using the above structure, no It needs that insulation system is separately provided, that is, use insulating part (such as the first insulating part 150) while realizing collector (such as the first current collection Body 140), the insulation between flange part 162 and trunk portion 161 and head cover 110, reduce the number of parts of cap assembly 100；And Using the structure, the junction in two insulation systems can be avoided to be mingled with foreign matter or even cause short circuit.Certainly, trunk portion 161 Special insulation system can also be set between head cover 110.

Wherein, in the first parcel 151 and flange part 162, the first limiting slot can be provided with one, another one is provided with First limit protrusion, that is to say, that the first limiting slot can be set with the first parcel 151, and the first limit convex is arranged in flange part 162 It rises；Or first parcel 151 be provided with the first limit protrusion, the first limiting slot is arranged in flange part 162, no matter which kind of method, Equal first limiting slot and the first limit protrusion coordinate, in such manner, it is possible to prevent the first pole 160, relative to insulating part, (such as first absolutely Edge part 150) it rotates, and then preferably fix the first pole 160.

Similarly, insulating part (such as the first insulating part 150) rotates relative to head cover 110 in order to prevent, as shown in figure 4, Insulating part (such as the first insulating part 150) is provided with the second limit protrusion 154, and head cover 110 is provided with the second limiting groove, the second limit Position protrusion 154 and the second limiting groove coordinate, and in this way, can not only prevent insulating part (such as the first insulating part 150) Rotation, and then prevent the rotation of pole (such as the first pole 160), meanwhile, the second limit protrusion 154 is set to insulating part (such as the first insulating part 150) is easy to be molded since insulating part (such as the first insulating part 150) is small compared with head cover 110, And in transportational process, it is not easy to damage.It is of course also possible to which the second limit protrusion 154, insulating part (the such as first insulation is arranged in head cover 110 Part 150) the second limiting groove of setting.

In the various embodiments described above, there are two collector and insulating part can be respectively set, two collectors are respectively first Collector 140 and the second collector 190, the structure of the two may be the same or different.Two insulating parts are respectively first exhausted Edge part 150 and the second insulating part 170, the structure of the two may be the same or different.

Head cover 110 can be strip piece shape structure, and as in Figure 2-4, cap assembly 100 further includes link block and pole, There are two link block settings, respectively the first link block 120 and the second link block 130, there are two pole is also provided with, respectively the One pole 160 and the second pole 180, the first pole 160 and the second pole 180 stretch out the upper of head cover 110 from the lower section of head cover 110 Side, respectively with positioned at head cover 110 above the first link block 120 and the second link block 130 connect, the first link block 120 and push up Lid 110 is isolated by the first separator 121, and the second link block 130 is isolated with head cover 110 by the second separator 131.

Electrode assembly 300 is including the first pole piece, the second pole piece and is set to being isolated between the first pole piece and the second pole piece Film, wherein the lug 310 of the first pole piece is connect by the first collector 140 with the first pole 160, the lug 310 of the second pole piece It is connect with the second pole 180 by the second collector 190, specifically, the first pole 160 or the second pole 180 are connected to respectively The terminal connection part 141 of self-corresponding collector, the first pole piece or the second pole piece are connected to the electricity of corresponding collector Pole interconnecting piece 144.It should be noted that the first pole 160 can be positive terminal, the second pole 180 is negative terminal, correspondingly, First pole piece is positive plate, and the second pole piece is negative plate；Can also the first pole 160 be negative terminal, the second pole 180 be anode Column, correspondingly, the first pole piece are negative plate, and the second pole piece is positive plate.Wherein, the first pole 160, the first insulating part 150, The connection type in any of the above-described embodiment may be used in the connection of one collector 140 and head cover 110；Second pole 180, second The connection of insulating part 170, the second collector 190 and head cover 110 can also use the connection type in any of the above-described embodiment.

Wherein, the another way to insulate with head cover 110 as in Fig. 3-4, shown the trunk portion of the second pole 180, i.e., It is realized and is insulated by sealing insulator 132 between the trunk portion and head cover 110 of second pole 180, the flange of the second pole 180 Portion, the second collector 190 are realized by the second insulating part 170 with head cover 110 and are insulated, that is to say, that the cylinder of the second pole 180 It is sealed between portion and head cover 110, between flange part and head cover 110 using different insulation systems, therefore, the second insulating part 170 are not provided with extension.

It is to be appreciated that under normal conditions, as one of positive terminal and head cover in the first pole 160 and the second pole 180 110 insulation sets, another one are electrically connected with head cover 110, so that head cover 110 and shell 200 are positively charged, prevent head cover 110 and shell Body 200 is corroded.It is right for the second pole 180 is electrically connected with head cover 110 with the first pole 160 and 110 insulation set of head cover Secondary cell is described further.

For secondary cell in order to solve the problems, such as to overcharge, cap assembly 100 further includes rotating sheet 122, is also set on head cover 110 It is equipped with through-hole, the first link block 120 is opposite with through-hole, and rotating sheet 122 attaches to head cover 110, and seals through-hole.Meanwhile second The terminal connection part of collector 190 is provided with fuse part 191, and the area of passage of fuse part 191 is less than its remaining part of terminal connection part The area of passage divided, as shown in figure 4, fuse part 191 is formed by way of through-hole is arranged on terminal connection part.When secondary electricity When pressure in pond is more than reference pressure, rotating sheet 122 overturns and is contacted with the first link block 120, to make the first pole 160 It is short-circuit with the second pole 180, and then fuse part 191 is made to fuse, to disconnect the connection of the second pole 180 and electrode assembly 300.

After fuse part 191 fuses, if slag is fallen on electrode assembly 300 or other components, it may cause First pole piece of electrode assembly 300 is connected with the second pole piece, causes secondary cell inner heat, or even catch fire, for this purpose, head cover group Part 100 further includes fuse protection component 171, and fuse protection component 171 wraps up fuse part 191, when fuse part 191 fuses, is melted Slag falls directly into fuse protection component 171, to protect the safety of secondary cell as far as possible.

It should be noted that if fuse part, then fuse protection component is arranged in the terminal connection part 141 of the first collector 140 171 wrap up the fuse part.

It is to be appreciated that being additionally provided with explosionproof hole 111 and liquid injection hole 112 on head cover 110, secondary cell further includes explosion-proof valve 113,113 sealed set of explosion-proof valve is in explosionproof hole 111, and liquid injection hole 112 is for being perfused electrolyte.

Secondary cell further includes insulating film 400, as shown in Fig. 2, being provided with insulation between cap assembly 100 and shell 200 Film 400, preferably to make electrode assembly 300, collector and shell 200 in cap assembly 100 insulate.

In addition, present invention also provides a kind of automobile, including the secondary cell described in any embodiment as above.

The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.

Claims (13)

1. a kind of cap assembly of secondary cell, which is characterized in that including：

Head cover；

Collector, the collector are set to below the head cover, including terminal connection part and the terminal connection part inside contract company The electricity in the contracting shoulder dilatation portion, the transition connection portion and the setting that overhangs with the transition connection portion that are connect with the contracting shoulder dilatation portion that connect Pole interconnecting piece；

Insulating part, the insulating part are set between the head cover and the contracting shoulder dilatation portion；

Along the length direction of the head cover, the transition connection portion is overhanging relative to the contracting shoulder dilatation portion, and stretches out described exhausted Edge part.

2. cap assembly according to claim 1, which is characterized in that the contracting shoulder dilatation portion is to be bent in an arc shape structure.

3. cap assembly according to claim 1, which is characterized in that the insulating part and the contracting shoulder dilatation portion are close to setting It sets.

4. cap assembly according to claim 1, which is characterized in that the width in the contracting shoulder dilatation portion and the transition connect Socket part is close to the width of the part in the contracting shoulder dilatation portion, the maximum width of the respectively less than described terminal connection part, the width Refer to the size of the thickness direction along the secondary cell.

5. cap assembly according to claim 4, which is characterized in that along the thickness direction of the secondary cell, the mistake Interconnecting piece is crossed close to the part tool in the contracting shoulder dilatation portion there are two opposite side, at least one side is provided with anti-tear Split notch.

6. cap assembly according to claim 5, which is characterized in that the side is close to one end of the electrode connecting portion It is provided with the anti-tear notch, the inner wall of the anti-tear notch and the electrode connecting portion are tangent.

7. cap assembly according to claim 5, which is characterized in that the one end of the side close to the contracting shoulder dilatation portion It is provided with the anti-tear notch.

8. cap assembly according to claim 1, which is characterized in that be provided with flange part and connection above the collector In the trunk portion of the flange part；

The terminal connection part is equipped with mounting hole, and one end of the trunk portion coordinates with mounting hole inserting, and the other end stretches out The head cover；The flange part pressure is set to one side of the terminal connection part close to the head cover.

9. cap assembly according to claim 8, which is characterized in that the insulating part includes：

First parcel, first parcel are set between the flange part and the head cover, and wrap up the flange part Close to the side of the one side and the flange part of the head cover；

Second parcel, second parcel are set between the terminal connection part and the head cover, and wrap up the end Sub- interconnecting piece is close to the side of the one side and the terminal connection part of the head cover.

10. cap assembly according to claim 9, which is characterized in that in first parcel and the flange part, one Person is provided with the first limiting slot, and another one is provided with the first limit protrusion, first limiting slot and first limit protrusion Cooperation.

11. according to claim 1-10 any one of them cap assemblies, which is characterized in that the insulating part is additionally provided with second Limit protrusion, the head cover are provided with the second limiting groove, and second limit protrusion coordinates with second limiting groove.

12. a kind of secondary cell, which is characterized in that including：

Shell is used for accommodate electrod component；

Such as claim 1-11 any one of them cap assemblies, the top seal is in the top of the shell；

The transition connection portion is overhanging relative to the contracting shoulder dilatation portion and close to the shell.

13. a kind of automobile, which is characterized in that including secondary cell as claimed in claim 12.