CN106450052A - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- CN106450052A CN106450052A CN201611005186.5A CN201611005186A CN106450052A CN 106450052 A CN106450052 A CN 106450052A CN 201611005186 A CN201611005186 A CN 201611005186A CN 106450052 A CN106450052 A CN 106450052A
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- CN
- China
- Prior art keywords
- terminal
- secondary cell
- coping plate
- contact chip
- insulating component
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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
Abstract
The present application relates to a secondary battery. The secondary battery includes electrode assembly, top cap piece, first terminal and second terminal, and electrode assembly includes first pole piece, second pole piece, and first pole piece is connected with first terminal electricity, and the second pole piece is connected with the second terminal electricity, and at least one in first terminal and the second terminal sets up with top cap piece is insulating, and the secondary battery still includes: and a conductive sheet attached to the first terminal, the conductive sheet including a first portion and a second portion connected, the first portion being electrically connected with the second terminal, the contact sheet acting under air pressure and contacting the second portion to form an electrical connection path through the first pole piece, the first terminal, the contact sheet, the conductive sheet, the second terminal, and the second pole piece when an internal pressure of the secondary battery exceeds a reference pressure, and the second portion being disposed to be relatively fixed with the top cover sheet. The scheme reduces the risk of displacement of the conducting strip under the action of the contact force, and improves the safety of the secondary battery.
Description
Technical field
The application is related to energy storage device technical field, more particularly, to a kind of secondary cell.
Background technology
Electric automobile and energy-accumulating power station etc. generally require to be used has jumbo secondary cell as power supply, and these are secondary
Battery, except having high power capacity, also should have good safety and can be only achieved using standard and the demand meeting people.
Secondary cell, can excessively can be produced inside it when secondary cell is in overcharging state by recharge and electric discharge
Heat, and electrolyte decomposition, this generation of heat and the decomposition of electrolyte make the pressure within secondary cell increase, may
Lead to secondary cell to catch fire and explode, reduce the safety of secondary cell.
In correlation technique, there is the scheme solving drawbacks described above, for example, setting contact chip and conduction in the secondary battery
Piece, using the air pressure within secondary cell, is made contact chip action and is made electrical contact with conducting strip, thus the positive plate by secondary cell
With negative plate short circuit.
However, when using such scheme, the contact force putting on when there is contact chip action on conducting strip makes conduction
The phenomenon that piece is subjected to displacement, so that between the two in electrical contact unreliable, and then lead to the overcharging state of secondary cell
Still lasting.
Content of the invention
The embodiment of the present application provides a kind of secondary cell, can improve drawbacks described above.
This application provides a kind of secondary cell, including：Electrode assemblie, coping plate, the first terminal and Second terminal,
Described electrode assemblie includes the first pole piece, the second pole piece and is arranged on described first pole piece and described second pole piece
Between dividing plate, described first pole piece electrically connected with described the first terminal, and described second pole piece is electrically connected with described Second terminal,
At least one of described the first terminal and described Second terminal and described coping plate insulation set,
Described secondary cell also includes：Conducting strip and the contact chip attaching to described the first terminal,
Described conducting strip includes the Part I being connected and Part II, described Part I and described Second terminal electricity
Connect, described Part II extends towards near the side of described the first terminal,
When the internal pressure of described secondary cell exceedes reference pressure, described contact chip under gas pressure action and with
Described Part II contact,
And described Part II is configured to be relatively fixed with described coping plate.
Preferably, described coping plate is electrically connected with described the first terminal, exhausted with described Second terminal and described conducting strip
Edge is arranged.
Preferably, also include the first insulating component, described Part II passes through described first insulating component and described top cover
Piece is relatively fixed.
Preferably, described first insulating component be located at described Part II near the side of described coping plate, and with described
Part II is fixedly connected,
Described Part II has the contact portion contacting with the contact chip after action, and described first insulating component opens up
There is hole exposed for described contact portion,
Described first insulating component is fixedly connected with described coping plate or described the first terminal.
Preferably, described first insulating component includes snap fit, and described snap fit is arranged at the edge in described hole.
Preferably, the quantity of described snap fit is multiple, and multiple described snap fits are along the edge arrangement in described hole.
Preferably, terminal board and the second insulating component are also included,
Described second insulating component is fixedly connected with described Part II, and described terminal board is connected with described the first terminal,
Described second insulating component is fixed at described the first terminal by described terminal board.
Preferably, described second insulating component offers installing hole, described second insulating component passes through described installing hole
It is sleeved on described the first terminal, the second insulating component described in described terminal board clamping.
Preferably, also include housing, described coping plate and described housing cover formation for encapsulating described electrode assemblie
First chamber and the second chamber that motion space is provided for described contact chip,
Described first chamber is separated by described contact chip with described second chamber, and described conducting strip is located at described top cover
The side away from described electrode assemblie of piece.
Preferably, described coping plate is provided with through hole, and described contact portion is just to described through hole.
Preferably, described the first terminal includes the terminal body being connected and extension,
Opening is offered, just to described through hole, described contact chip seals described opening to described opening on described extension, with
Described first chamber is separated with described second chamber.
Preferably, described contact chip includes turning part and plush copper,
Turning part is lamellar annuli arrangement,
Described plush copper is connected to turning part, and protrudes towards the side of described coping plate,
The outward flange of turning part is tightly connected with described extension, and can pass through described during described contact chip action
Plush copper is contacted with described contact portion.
The technical scheme that the application provides can reach following beneficial effect：
This application provides a kind of secondary cell, including conducting strip, the contact chip that attaches to the first terminal, conducting strip includes
The Part I being connected and Part II, Part I is electrically connected with Second terminal, and Part II is towards near the first terminal
Side extend, can contact with Part II when contact chip action in the presence of secondary cell air pressure inside, and the
Two parts are configured to be relatively fixed with coping plate, this scheme reduces the work of the contact force that conducting strip applies to it in contact chip
With under the risk that is subjected to displacement, improve the contact chip reliability in electrical contact with conducting strip, thus improve secondary cell
Safety.
It should be appreciated that above general description and detailed description hereinafter are only exemplary, can not be limited this
Application.
Brief description
The isometric exploded view of the secondary cell part-structure that Fig. 1 is provided by the embodiment of the present application；
The sectional view of the secondary cell part-structure that Fig. 2 is provided by the embodiment of the present application；
Fig. 3 is the zoomed-in view of the aminoacyl site in Fig. 2；
The schematic diagram that the conducting strip that Fig. 4 is provided by the embodiment of the present application is connected with the first insulating component；
The enforcement of the sealing structure being sealed between first chamber and second chamber that Fig. 5 is provided by the embodiment of the present application
The schematic diagram of example one；
The enforcement of the sealing structure being sealed between first chamber and second chamber that Fig. 6 is provided by the embodiment of the present application
The schematic diagram of example two；
The enforcement of the sealing structure being sealed between first chamber and second chamber that Fig. 7 is provided by the embodiment of the present application
The schematic diagram of example three.
Reference：
11- the first terminal；
111- terminal body；
112- extension；
112a- opening；
112b- column；
12- contact chip；
121- plush copper；
121a- second contact plane；
122- turning part；
13- containment member；
131- primary sealing area；
132- secondary sealing area；
15- terminal board；
16- first insulating cell；
21- Second terminal；
22- conducting strip；
221- Part I；
222- Part II；
222a- contact portion；
222aa- first contact plane；
23a- first insulating component；
23aa- passes through hole；
23ab- snap fit；
23b- second insulating component；
24- insulating part；
25- second insulating cell；
41- coping plate；
411- body part；
412- bump；
413- through hole.
Accompanying drawing herein is merged in description and constitutes the part of this specification, shows the enforcement meeting the application
Example, and be used for explaining the principle of the application together with description.
Specific embodiment
Below by specific embodiment and combine accompanying drawing the application is described in further detail.Below by concrete
Embodiment and combine accompanying drawing the application be described in further detail.Literary composition described in "front", "rear", "left", "right",
" on ", D score all with the laying state of the secondary cell in accompanying drawing as reference.
As shown in figs. 1-7, the embodiment of the present application provides a kind of secondary cell, and this secondary cell includes the first terminal 11 He
Second terminal 21, the first terminal 11 can be connected formation current loop with Second terminal 21 with external circuit, and secondary cell is as outer
Power supply in circuit, outwardly exports electric energy.
Wherein, the first terminal 11 can serve as positive terminal, and correspondingly, Second terminal 21 is used as negative terminal, otherwise also
Can.
As shown in figure 1, secondary cell generally includes electrode assemblie, housing (in figure is all not shown) and coping plate 41, shell
Body can cover formation accommodating chamber by modes such as welding with coping plate 41, and electrode assemblie is housed in receiving intracavity.
Electrode assemblie generally includes the first pole piece and the second pole piece, and the first pole piece has the first lug, and the second pole piece has
Second lug, the first pole piece is electrically connected with the first terminal 11 via the first lug, and the second pole piece is via the second lug and the second end
Son 21 electrical connection is so that electric energy is finally outwardly exported by electrode assemblie.
The secondary cell that the application provides also includes conducting strip 22 and contact chip 12, wherein, the first set-up mode, connect
Contact 12 can be arranged on the first pole piece with electrical connection loop during the second pole piece short circuit, i.e. overcharges when secondary cell is in
During state, when the pressure in secondary cell exceedes reference pressure, air pressure is promoted contact chip 12 action and is contacted with conducting strip 22,
Now, the first pole piece, the first terminal 11, contact chip 12, conducting strip 22, Second terminal 21 and the second pole piece form to be electrically connected and take back
Road, however, when secondary cell is in the state of normal operating, electric current is then not passed through contact chip 12 and conducting strip 22.
Second set-up mode, contact chip 12 can also be arranged on the electrical connection loop in normal operating for the secondary cell
In, i.e. contact chip 12 is series between the first pole piece and the first terminal 11.
When secondary cell is in overcharging state, air pressure is promoted contact chip 12 action and is contacted with conducting strip 22, now, the
The electrical connection loop that one pole piece, the first terminal 11, contact chip 12, conducting strip 22, Second terminal 21 and the second pole piece are formed.Or
Person, when the pressure in secondary cell exceedes reference pressure, air pressure promotes contact chip 12 action, and contact chip 12 first disconnects and the first pole
The status of electrically connecting of piece, and the contact chip 12 after action contacted with conducting strip 22, makes the first terminal 11 and Second terminal 21 electricity
Connect.
Contact chip 12 action contacting with conducting strip 22 under gas pressure, can be directly contact between the two, or
It is to arrange other electric conductors between contact chip 12 and conducting strip 22 to make contact chip 12 and conducting strip 22 mediate contact.
Below, the secondary cell that the application provides to the application taking the first set-up mode as a example is described in detail, but
Scheme in the application is applicable not only to the first set-up mode, is equally applicable to second set-up mode.
As shown in Figure 1-2, contact chip 12 attaches to the first terminal 11, and contact chip 12 and the first terminal 11 can be integral types
Structure or split-type structural.
Conducting strip 22 includes the Part I 221 being connected and Part II 222, and wherein, Part I 221 is electrically connected to
Second terminal 21, Part II 222 extends towards near the side of the first terminal 11, when the internal pressure of secondary cell exceedes benchmark
During pressure, contact chip 12 action contacting with Part II 222 under gas pressure, pass through the first pole piece, first end to be formed
Sub 11, contact chip 12, the electrical communication path of conducting strip 22, Second terminal 21 and the second pole piece, and Part II 222 are set
Become to be relatively fixed with coping plate 41.
According to above description, when contact chip 12 is contacted with Part II 222 under gas pressure, by by second
Divide 222 to be arranged to be relatively fixed this scheme with coping plate 41, reduce conducting strip 22 and be subjected to displacement in the presence of contact force
Risk, improve contact chip 12 reliability in electrical contact with conducting strip 22, improve the safety of secondary cell.
As shown in Fig. 2 more properly, accommodating chamber that housing and coping plate 41 are formed after covering include first chamber S1 and
Second chamber S2.Specifically, first chamber S1 is used for encapsulated electrode assembly, and second chamber S2 is used for as contact chip 12 offer action
Space, and first chamber S1 separated by contact chip 12 with second chamber S2.When the internal pressure of first chamber S1 exceedes benchmark
During pressure, gas pressure acts on contact chip 12, and promotes its action.
Contact chip 12 after action can realize electrical contact with Part II 222, and wherein, conducting strip 22 is located at coping plate 41
Away from the side of electrode assemblie, and with coping plate 41 insulation set.Conducting strip 22 can be entirely located in the inside of second chamber S2,
The outside of second chamber S2 can also be entirely located in.When conducting strip 22 be entirely located in second chamber S2 outside when, contact chip 12
The heat producing when being made electrical contact with conducting strip 22 can more easily be disperseed by conduction.
In the embodiment shown in Figure 2, a part for conducting strip 22 is arranged in second chamber S2, and remainder is located at the
Outside two chamber S2, this scheme take into account be easy to radiate and facilitate implementation with the electrical contact these two aspects of contact chip 12 and arrange.
Specifically, as shown in Figure 1-2, contact chip 12 attaches on the first terminal 11, and conducting strip 22 is arranged on coping plate 41
Top, Part I 221 is connected with Second terminal 21, and Part II 222 extends towards the side of the first terminal 11, wherein,
Conducting strip 22 and coping plate 41 insulation set.
In order to realize the contact of contact chip 12 and conducting strip 22, coping plate 41 offers through hole 413, Part II 222
There is the projection being convex to contact chip 12, this projection is the contact portion with contact chip 12 electrical contact after action
222a, this contact portion 222a is located in second chamber S2, the setting of contact portion 222a facilitate the radiating of conducting strip 22 with
And the setting being spaced between conducting strip 22 and contact chip 12, this interval enables mutual in contact chip 12 action between the two
Contact, being capable of mutually insulated before contact chip 12 action.
Further, according to an embodiment, as shown in figure 3, contact chip 12 includes plush copper 121 and turning part 122, wherein,
Turning part 122 is lamellar annuli arrangement, and this is conducive to contact chip 12 to realize action under gas pressure, and plush copper 121 is connected to turns over
Transfer part 122 and the side protrusion towards coping plate 41, when contact chip 12 action, contact chip 12 by plush copper 121 and can connect
Contact portion divides 222a to contact.In the program, the setting of plush copper 121 can leave the base of appropriate intervals between contact portion 222a
The upset stroke of contact chip 12 is reduced on plinth, improves the safety of secondary cell.Further, plush copper 121 and turning part 122 are
Integral structure.
And further, contact portion 222a has the first contact plane 222aa, referring to Fig. 3, correspondingly, plush copper 121 has
There is the second contact plane 121a, when contact chip 12 is contacted with Part II 222, the first contact plane 222aa contacts flat with second
Face 121a makes electrical contact with.This scheme so that contact chip 12 has larger contact area with Part II 222 when contacting, with
Ensure reliably in electrical contact between the two.
For conducting strip 22, conducting strip 22 should maintain static in theory, and contact portion 222a is towards contact chip 12
One side surface can be used as the first contact plane 222aa.For contact chip 12, can deform after contact chip 12 action,
Relatively small in view of the deflection at plush copper 121, this plush copper 121 keeps plane substantially towards a side surface of conducting strip 22
State, therefore, this plush copper 121 can be used as the second contact plane 121a towards the surface of conducting strip 22.
Contact chip 12 action contacting with Part II 222 under gas pressure, can be directly contact between the two, or
Person is to arrange other electric conductors between contact chip 12 and Part II to make contact chip 12 and Part II 222 mediate contact.
Part I 221 can be both directly contacts and be connected with each other with the electric connection mode of Second terminal 21, also
Can be that Part I 221 is connected with Second terminal 21 by other electric conductors, the application is not construed as limiting to this, as long as conducting strip
22 are capable of the conducting of electric current with Second terminal 21.
Under normal circumstances, the first terminal 11 and a part for Second terminal 21 stretch out coping plate 41 respectively, and extension
It is connected with external circuit.In the case, at least one of the first terminal 11 and Second terminal 21 can be insulated with coping plate 41
Setting.Wherein, the mode of insulation for example can arrange insulating part etc. between two-terminal and coping plate 41 and realize, referring to Fig. 2, the
Can be insulated by the first insulating cell 16 between one terminal 11 and coping plate 41, can lead between Second terminal and coping plate 41
Cross the second insulating cell 25 to insulate.Wherein insulant can select rubber, asbestos etc..
According to an embodiment, in the embodiment that the first terminal 11 is used as positive terminal, can by coping plate 41 with
The first terminal 11 electrically connects, and coping plate 41 and Second terminal 21 and conducting strip 22 insulation set, and the advantage being arranged such exists
In, after coping plate 41 is electrically connected with the first terminal 11 as positive pole, housing and the equal positively charged of coping plate 41, electricity is reduced with this
The solution corrosion to housing and coping plate 41 for the liquid, increases the service life.
In some other embodiment, for example, it is also possible to by coping plate 41 and the first terminal 11 and Second terminal 21, lead
The equal insulation set of electric piece 22.
Additionally, be used as in the embodiment of positive terminal in the first terminal 11, and when coping plate 41 is electrically connected with the first electronics 11
When connecing, now, the first terminal 11 need not stretch out outside coping plate 41, and the first terminal 11 can be realized and external circuit via coping plate 41
Electrical connection.
According to an embodiment, as Figure 1-3, secondary cell also includes the first insulating component 23a, and Part II
222 are relatively fixed with coping plate 41 by the first insulating component 23a.In this scheme, the first insulating component 23a is as fixing
The middleware of Part II 222, can avoid making electrical contact between conducting strip 22 and adjacent component, its fixed form is more
Safety and reliability.
First insulating component 23a is located at conducting strip 22 near the side of coping plate 41, and fixes even with Part II 222
Connect, the first insulating component 23a offers for contact portion 222a exposed by hole 23aa, and the first insulating component
23a is fixedly connected with coping plate 41 or the first terminal 11.After being arranged such, when the first insulating component 23a is with respect to coping plate 41
Fixing, then Part II 222 is fixing also relative to coping plate 41.
In the above-described embodiment, the first insulating component 23a not only realizes Part II 222 consolidating with respect to coping plate 41
Fixed, also also serve as the insulating part between coping plate 41 and conducting strip 22, realize insulation between the two.
The fixed form of the first insulating component 23a and coping plate 41 or the first terminal 11 have multiple, for example, the first insulation structure
Part 23a can be fixedly connected with coping plate 41 or the first terminal 11 in the way of using bonding.As in Figure 2-4, the first insulation structure
Part 23a includes snap fit 23ab, and snap fit 23ab is arranged at the edge by hole 23aa, snap fit 23ab and coping plate 41 or first end
Son 11 connects and fixes, and in the program, snap fit 23ab is arranged adjacent to contact portion 222a, can reduce Part II 222 in contact
Displacement under power effect is so that both contacts are relatively reliable.
Specifically, when connecting and fixing this scheme using snap fit 23ab with coping plate 41, snap fit 23ab can stretch into logical
The inside in hole 413, and it is connected to the edge of through hole 413.The program is realizing the first insulating component 23a with coping plate 41 admittedly
On the premise of fixed, avoid separately arranging interface arrangment on coping plate 41 simultaneously.
When this scheme is connected and fixed with the first terminal 11 using snap fit 23ab, as shown in figure 3, can be in opening 112a
Edge axially extend column 112b to the side near the first insulating component 23a along opening 112a, and in column
Open up cavity on body 112b, this cavity is connected with opening 112a, snap fit 23ab stretches in this cavity, and be connected to the side of cavity
At edge.
Above two scenario-frame is simple, it is easy to accomplish.And, in above two embodiment, the quantity of snap fit 23ab
Can be multiple, multiple snap fit 23ab, along the edge arrangement by hole 23aa, increase the first insulating component 23a and coping plate with this
Clamping power between 41 or the first terminal 11, relatively reliable with respect to the fixation of coping plate 41 to ensure Part II 222.
Additionally, realize Part II 222 and the relatively-stationary scheme of coping plate 41 be not limited only to described above,
In other embodiment, can also be using other alternatives, as shown in figure 5, secondary cell also includes terminal board 15 and the
Two insulating component 23b, the second insulating component 23b is fixedly connected with Part II 222, and terminal board 15 is connected with the first terminal 11,
Second insulating component 23b is fixed at the first terminal 11 by terminal board 15.After so arranging, terminal board 15 is to the second insulation
Component 23b to apply active force, is subjected to displacement to the side away from coping plate 41 with limiting the second insulating component 23b, thus limiting
The displacement with respect to coping plate 41 for the Part II.
Further, the second insulating component 23b is further opened with installing hole, the second insulating component 23b is set with by installing hole
On the first terminal 11, more properly, it is to be sleeved in terminal body 111, the second insulating component 23b is clamped in by terminal board 15
On coping plate 41, to realize the fixation between the second insulating component 23b and coping plate 41, it is exhausted that the setting of installing hole avoids second
Edge structure 23b part departs from the risk of terminal board 15, improves Part II 222 reliability fixing with respect to coping plate 41.
In embodiment shown in Fig. 2 and Fig. 5, conducting strip 22 is additionally provided with insulating part 24 away from the side of coping plate 41,
Insulating part 24 and the first insulating component 23a or the second insulating component 23b are integral type structure, and the setting of insulating part 24 can prevent outward
Boundary is connected with conducting strip 22, the phenomenon of unnecessary electrical connection.
Additionally, for the internal pressure ensureing contact chip 12 quick response secondary cell, secondary cell also includes being sealed in
Containment member 13 between first chamber S1 and second chamber S2.According to an embodiment, as shown in Fig. 2 containment member 13 is close
Envelope is connected between extension 112 and coping plate 41, and containment member 13 to have first in sealing contact with coping plate 41 close
Front cover 131 and the secondary sealing area 132 in sealing contact with extension 112.
Specifically, containment member 13 can be loop configuration, and containment member 13 is sleeved on outside column 112b, column
112b is embedded in through hole 413 together with containment member 13, and the inwall of containment member 13 and through hole 413 and column 112b's is outer
Wall is in sealing contact, so that containment member 13 forms the primary sealing area and that the bearing of trend along coping plate 41 is oppositely arranged
Two sealing surfaces.
Additionally, as shown in figure 5, containment member 13 can also work as containment member around through hole 413 and opening 112a setting
13 is in sealing contact with coping plate 41 and extension 112 respectively, that is, form that the short transverse along secondary cell is oppositely arranged
One sealing surface 131 and secondary sealing area 132.
In some other embodiment, as shown in fig. 6, containment member 13 can also be sealedly attached to contact chip 12 and coping plate
Between 41, and containment member 13 is had the primary sealing area 131 in sealing contact with coping plate 41 and is sealed with contact chip 12
The secondary sealing area 132 of contact, and, primary sealing area 131 is relative along the short transverse of secondary cell with secondary sealing area 132
Setting.
In the embodiment shown in fig. 6, as long as to extension 112 and contact chip 12 slightly modification, it is also possible that the
One sealing surface 131 and secondary sealing area 132 are oppositely arranged along the bearing of trend of coping plate 41, and here is omitted.
In addition, as shown in fig. 7, the plastic parts being also with being arranged between the first terminal 11 and coping plate 41 is close to serve as
Envelope component 13, this scheme can reduce the usage quantity of parts in secondary cell, simplifies assembly technology.
As shown in Figure 1-2, the limited space of second chamber S2 being formed after being covered due to housing and coping plate 41, therefore,
The motion space of contact chip 12 is restricted, and in order to increase this space, preferably coping plate 41 includes body part 411 and protuberance
Part 412, the side that bump 412 is directed away from housing projects so that second chamber S2 is by contact chip 12 and bump
412 surround, and through hole 413 is arranged on bump 412.So, the space of second chamber S2 is extended, this
Meaning after spatial spread is, when contact chip 12 action, the air compression ratio in this space reduces, during contact chip 12 action
Resistance reduce, be conducive to improve contact chip 12 action when sensitivity.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.All within spirit herein and principle, made any repair
Change, equivalent, improvement etc., should be included within the protection domain of the application.
Claims (12)
1. a kind of secondary cell, including：Electrode assemblie, coping plate, the first terminal and Second terminal it is characterised in that
Described electrode assemblie includes the first pole piece, the second pole piece and is arranged between described first pole piece and described second pole piece
Dividing plate, described first pole piece electrically connected with described the first terminal, and described second pole piece is electrically connected with described Second terminal,
At least one of described the first terminal and described Second terminal and described coping plate insulation set,
Described secondary cell also includes：Conducting strip and the contact chip attaching to described the first terminal,
Described conducting strip includes the Part I being connected and Part II, and described Part I is electrically connected with described Second terminal
Connect, described Part II extends towards near the side of described the first terminal,
When the internal pressure of described secondary cell exceedes reference pressure, described contact chip under gas pressure action and with described
Part II contacts,
And described Part II is configured to be relatively fixed with described coping plate.
2. secondary cell according to claim 1 is it is characterised in that described coping plate is electrically connected with described the first terminal,
With described Second terminal and described conducting strip insulation set.
3. secondary cell according to claim 1 is it is characterised in that also include the first insulating component, described Part II
It is relatively fixed by described first insulating component and described coping plate.
4. secondary cell according to claim 3 is it is characterised in that described first insulating component is located at described Part II
Near the side of described coping plate, and it is fixedly connected with described Part II,
Described Part II has the contact portion contacting with the contact chip after action, and described first insulating component offers confession
The exposed hole of described contact portion,
Described first insulating component is fixedly connected with described coping plate or described the first terminal.
5. secondary cell according to claim 4 is it is characterised in that described first insulating component includes snap fit, described card
Hook the edge being arranged at described hole.
6. secondary cell according to claim 5 is it is characterised in that the quantity of described snap fit is multiple, multiple described cards
Hook the edge arrangement along described hole.
7. secondary cell according to claim 1 is it is characterised in that also include terminal board and the second insulating component,
Described second insulating component is fixedly connected with described Part II, and described terminal board is connected with described the first terminal,
Described second insulating component is fixed at described the first terminal by described terminal board.
8. secondary cell according to claim 7 is it is characterised in that offer installing hole on described second insulating component,
Described second insulating component is sleeved on described the first terminal by described installing hole, the second insulation described in described terminal board clamping
Component.
9. secondary cell according to claim 4 is it is characterised in that also include housing, described coping plate and described housing
Cover first chamber and the second chamber that motion space is provided being formed for encapsulating described electrode assemblie for described contact chip,
Described first chamber is separated by described contact chip with described second chamber, and described conducting strip is located at described coping plate
Side away from described electrode assemblie.
10. secondary cell according to claim 9 is it is characterised in that described coping plate is provided with through hole, described contact site
Lease making is contacted with described contact chip by described through hole.
11. secondary cells according to claim 10 are it is characterised in that described the first terminal includes the terminal being connected originally
Body and extension,
Opening is offered, just to described through hole, described contact chip seals described opening to described opening, by institute on described extension
State first chamber to separate with described second chamber.
12. secondary cells according to claim 11 it is characterised in that described contact chip includes turning part and plush copper,
Turning part is lamellar annuli arrangement,
Described plush copper is connected to turning part, and protrudes towards the side of described coping plate,
The outward flange of turning part is tightly connected with described extension, and can be by described plush copper during described contact chip action
Contact with described contact portion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611005186.5A CN106450052A (en) | 2016-11-15 | 2016-11-15 | Secondary battery |
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| CN201611005186.5A CN106450052A (en) | 2016-11-15 | 2016-11-15 | Secondary battery |
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| CN106450052A true CN106450052A (en) | 2017-02-22 |
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| WO2019051630A1 (en) * | 2017-09-12 | 2019-03-21 | 宁德时代新能源科技股份有限公司 | Top cover assembly of secondary battery and secondary battery |
| CN110649206A (en) * | 2019-09-29 | 2020-01-03 | 惠州亿纬锂能股份有限公司 | Explosion-proof valve component, top cover and battery |
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| CN204668368U (en) * | 2015-06-11 | 2015-09-23 | 宁德时代新能源科技有限公司 | Top cover structure of power battery and electrokinetic cell |
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| CN102738522A (en) * | 2011-03-30 | 2012-10-17 | Sb锂摩托有限公司 | Secondary battery |
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| CN110832661B (en) * | 2017-09-12 | 2021-08-03 | 宁德时代新能源科技股份有限公司 | Secondary cell's top cap subassembly and secondary cell |
| CN110649206A (en) * | 2019-09-29 | 2020-01-03 | 惠州亿纬锂能股份有限公司 | Explosion-proof valve component, top cover and battery |
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