CN106410074A - Secondary battery - Google Patents
Secondary battery Download PDFInfo
- Publication number
- CN106410074A CN106410074A CN201611005190.1A CN201611005190A CN106410074A CN 106410074 A CN106410074 A CN 106410074A CN 201611005190 A CN201611005190 A CN 201611005190A CN 106410074 A CN106410074 A CN 106410074A
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- CN
- China
- Prior art keywords
- terminal
- contact
- contact chip
- sealing
- secondary cell
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 86
- 230000009471 action Effects 0.000 claims abstract description 31
- 230000010485 coping Effects 0.000 claims description 67
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 abstract description 3
- 210000004027 cell Anatomy 0.000 description 47
- 210000003168 insulating cell Anatomy 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present application relates to a secondary battery. The secondary battery includes: electrode assembly, first terminal and second terminal and top lid piece and casing, electrode assembly include first pole piece and 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 secondary battery still includes: the secondary battery comprises a sealing component, a contact piece attached to the first terminal and a conducting strip electrically connected with the second terminal, wherein the top cover plate is arranged in an insulating mode with at least one of the first terminal and the second terminal, when the internal pressure of the secondary battery exceeds the reference pressure, the contact piece acts under the action of air pressure and is in contact with the conducting strip, the top cover plate and the shell cover to form a first cavity and a second cavity, the sealing component is sealed between the first cavity and the second cavity, the sealing component is provided with a first sealing surface in sealing contact with the top cover plate and a second sealing surface in sealing contact with the first terminal or the contact piece, and the first sealing surface and the second sealing surface are arranged oppositely along the extending direction of the top cover plate.
Description
Technical field
The application is related to energy storage device technical field, more particularly, to a kind of secondary cell.
Background technology
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 security of secondary cell.
In order to overcome drawbacks described above, in secondary cell, generally contact chip and conducting strip are set, using within secondary cell
Air pressure, is made contact chip action and is made electrical contact with conducting strip, thus by the positive plate of secondary cell and negative plate short circuit, to reduce
The risk that secondary cell catches fire and explodes.
For contact chip attaches to this scheme of terminal, need to increase terminal on coping plate bearing of trend
To form extension, contact chip is arranged on this extension length, and this makes terminal become cantilever design.
And, in order to ensure the sensitivity of contact chip action, need setting containment member to make the both sides shape in contact chip
Become pressure differential, when containment member puts on power in sealing contact on extension and acts on along the short transverse of secondary cell, extend
Easily there is deformation displacement towards secondary cell bottom so that sealing effectiveness is poor in portion under this active force, thus leading to contact
The action sensitivity of piece declines, and contact chip cannot reduce the security of secondary cell in action under rated pressure.
Content of the invention
The embodiment of the present application provides a kind of secondary cell, ensure that the reliability of sealing, improves the action of contact chip
Sensitivity.
This application provides a kind of secondary cell, including：Electrode assemblie, the first terminal and Second terminal and coping plate and
Housing,
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,
Described secondary cell also includes：Containment member, attach to the contact chip of described the first terminal and with described second
The conducting strip of terminal electrical connection,
Described coping plate and at least one of described the first terminal and described Second terminal insulation set,
When the internal pressure of described secondary cell exceedes reference pressure, described contact chip under gas pressure action and with
Described conducting strip contact,
Described coping plate and described housing cover the first chamber being formed for encapsulating described electrode assemblie and connect for described
Contact provides the second chamber of motion space, and described first chamber is separated by described contact chip with described second chamber,
Described containment member is sealed between described first chamber and second chamber, and described containment member has and described top
Cover plate primary sealing area in sealing contact and the secondary sealing area in sealing contact with described the first terminal or described contact chip, institute
State primary sealing area to be oppositely arranged along the bearing of trend of described coping plate with described secondary sealing area.
Preferably, described the first terminal is electrically connected with described coping plate, described Second terminal and described coping plate and institute
State conducting strip insulation set.
Preferably, described coping plate offers through hole, described conducting strip has can be with the described contact chip after action
The contact portion of contact, described contact portion stretches into described through hole and is located in described second chamber.
Preferably, described coping plate includes the body part being connected and bump, and described bump is directed away from
The side of described housing projects, and described second chamber is surrounded with described bump by described contact chip, and the setting of described through hole
On described bump.
Preferably, described the first terminal includes the terminal body being connected and extension,
Opening is offered, described contact chip is sealedly connected at described opening, by described first chamber on described extension
Room is separated with described second chamber,
When described containment member and described the first terminal are in sealing contact, described secondary sealing area be described containment member with
Described extension surface in sealing contact.
Preferably, described terminal body and described extension are integral type structure or split-type structural.
Preferably, described extension includes body and cylindrical body,
Described opening opens up on the body, and described cylindrical body is from described body along edge's direction of described opening
The side of described coping plate extends,
Described containment member contacts the described primary sealing area of formation with the inner wall sealing of described through hole, with described cylindrical body
Outer peripheral face is in sealing contact to form described secondary sealing area.
Preferably, the outer peripheral face of described cylindrical body offers the sealed groove of the axis around described cylindrical body, described
Containment member is embedded in described sealed groove, and described secondary sealing area is contacted with the sealing bottom surface of described sealed groove.
Preferably, in described sealed groove, the shape of the outer contour of described containment member and described sealed groove
The shape of inner outline is adapted.
Preferably, described contact chip includes turning part and plush copper,
Turning part is sheet 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 coping plate.
The technical scheme that the application provides can reach following beneficial effect：
This application provides a kind of secondary cell, including containment member, conducting strip and contact chip, coping plate and case lid
Conjunction defines first chamber and second chamber, and first chamber is separated by contact chip with second chamber, and contact chip attaches to first end
Son, containment member is sealed between coping plate and the first terminal or contact chip, and has first in sealing contact with coping plate
Sealing surface and the secondary sealing area in sealing contact with the first terminal or contact chip, primary sealing area and secondary sealing area are along coping plate
Bearing of trend be oppositely arranged, this scheme makes containment member put on the power in sealing contact on the first terminal and is no longer along two
The short transverse of primary cell, but the bearing of trend along coping plate, therefore, this power in sealing contact will not make cantilever design
There is the deformation displacement towards secondary cell bottom in the first terminal, improve the first terminal of cantilever design bear in sealing contact
Seal insecure defect during power, improve the sensitivity of contact chip action, and then improve the security of secondary cell.
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 at the A position in Fig. 2；
The structural representation of the first terminal that Fig. 4 is provided by the embodiment of the present application；
The sectional view of the containment member that Fig. 5 is provided by the embodiment of the present application and the first terminal.
Reference：
11- the first terminal；
111- terminal body；
112- extension；
112a- opening；
112b- body；
112c- cylindrical body；
112ca- sealed groove；
12- contact chip；
121- plush copper；
121a- second contact plane；
122- turning part；
13- containment member；
131- primary sealing area；
132- secondary sealing area；
14- first insulating cell；
21- Second terminal；
22- conducting strip；
221- contact portion；
221a- first contact plane；
23- insulating component；
24- second insulating cell；
31- coping plate；
311- body part；
312- bump；
313- through hole.
Accompanying drawing herein is merged in specification 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 specification.
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 Figure 1-5, 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.
Secondary cell generally includes electrode assemblie and housing (in figure is all not shown) and coping plate 31, housing and coping plate
31 can cover formation accommodating chamber by modes such as welding, and electrode assemblie 31 is housed in accommodating chamber.
More properly, the accommodating chamber being formed after housing and coping plate 31 cover includes first chamber S1 and second chamber
S2.Specifically, first chamber S1 is used for encapsulated electrode assembly, and second chamber S2 is used for providing motion space for contact chip 12, and
First chamber S1 is separated by contact chip 12 with second chamber S2.When the internal pressure of first chamber S1 exceedes reference pressure,
Gas pressure acts on contact chip 12, and promotes its action.
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.
As shown in Figure 1-2, the secondary cell that the application provides also includes contact chip 12, conducting strip 22 and containment member 13.
Contact chip 12 has multiple set-up modes, wherein, the first set-up mode, contact chip 12 can be arranged on the first pole piece and second
In electrical connection loop during pole piece short circuit, i.e. when secondary cell is in overcharging state, and when the internal pressure of secondary cell is big
When reference pressure, air pressure promotes contact chip 12 action simultaneously to contact with conducting strip 22, now, the first pole piece, the first terminal 11, connects
Contact 12, conducting strip 22, Second terminal 21 and the second pole piece form electrical connection loop.However, when secondary cell is in normally
During the state of operation, 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 the state of normal operating,
Electric current flows through contact chip 12.However, when secondary cell is in overcharging state, and when the internal pressure of secondary cell is more than benchmark
During 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
12nd, conducting strip 22, Second terminal 21 and the second pole piece form electrical connection loop.Or, when the internal pressure of secondary cell surpasses
When crossing reference pressure, air pressure promotes contact chip 12 action, and contact chip 12 disconnects and the electrical connection of the first pole piece first, subsequent with lead
Electric piece 22 contacts, so that the first terminal 11 and Second terminal 21 electrically connect.
Contact chip 12 action is simultaneously contacted with conducting strip 22, can be both directly contacts it is also possible in contact chip 12 and lead
Conductor is set between electric piece 22, and contact chip 12 and coping plate 31 pass through this conductor 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.
In embodiment shown in Fig. 1-3, contact chip 12 attaches to the first terminal 11, contact chip 12 by first chamber S1 with
Second chamber S2 separates, and in order to form pressure differential in the both sides of contact chip 12, containment member 13 is sealed in first chamber S1 and the
Between two chamber S2, containment member 13 have the primary sealing area 131 in sealing contact with coping plate 31 and with the first terminal 11
Or the secondary sealing area 132 that contact chip 12 is in sealing contact, primary sealing area 131 prolonging along coping plate 31 with secondary sealing area 132
Stretch direction to be oppositely arranged.
According to above description, primary sealing area 131 and secondary sealing area 132 relative set along the bearing of trend of coping plate 31
Put, when containment member 13 and the first terminal 11 are in sealing contact or containment member 13 or contact chip 12 in sealing contact when, sealing
Contact force will not act on the first terminal 11 or contact chip 12 along the short transverse of secondary cell, and then makes the first terminal 11
Or the deformation displacement of the short transverse along secondary cell in the presence of contact chip 12 here power in sealing contact, will not be produced, improve
The first terminal 11 of cantilever design seals insecure defect when bearing power in sealing contact, improves the spirit of contact chip 12 action
Sensitivity, and then improve the security of secondary cell.
Thus, when internal pressure value exceedes base pressure force value, contact chip 12 action is simultaneously contacted with conducting strip 22, to be formed
By the first pole piece, the first terminal 11, contact chip 12, lamina tecti 31, Second terminal 21 and the second pole piece electrical communication path,
Make secondary cell form the state of external short circuit, thus reduce secondary cell blast and the risk caught fire, improve secondary electricity
The security in pond.
Contact chip 12 attaches to the first terminal 11, and wherein, contact chip 12 and the first terminal 11 can be integral structures,
It can be split-type structural.
Coping plate 31 and at least one of the first terminal 11 and Second terminal 21 insulation set, and exhausted with conducting strip 22
Edge is arranged.Can pass through to arrange insulating part between coping plate 31 and the first terminal 11 and between coping plate 31 and Second terminal 21
To realize insulating.As shown in Fig. 2 being provided with the first insulating cell 14 between the first terminal 11 and coping plate 31, the first insulation lining
Pad 14 is clamped between the first terminal 11 and coping plate 31, to realize both insulation.In the same manner, Second terminal 21 and coping plate 31
Between be provided with the second insulating cell 24, the second insulating cell 24 is clamped between Second terminal 21 and coping plate 31, wherein,
The material of the first insulating cell 14 and the second insulating cell 24 can select rubber, asbestos etc..
In addition, in the embodiment that the first terminal 11 is used as positive terminal, can be by coping plate 31 and the first terminal 11
Electrical connection, and with Second terminal 21 insulation set, be arranged such and can make housing and the equal positively charged of coping plate 31, can be subtracted with this
The corrosion to housing and coping plate 31 for the little electrolyte, increases the service life.
Under normal circumstances, the first terminal 11 and a part of of Second terminal 21 all stretch out coping plate 31, and extension with
External circuit connects.In some embodiments, it is also possible to the first terminal 11 electrically connecting with coping plate 31 need not be stretched out coping plate
Outside 31, in the case, the first terminal 11 can realize the electrical connection with external circuit via coping plate 31.
The limited space of second chamber S2 being formed after being covered due to housing and coping plate 31, therefore, contact chip 12 dynamic
It is restricted as space, in order to increase this space, preferably coping plate 31 includes the body part 311 being connected and bump
312, the side that bump 312 is directed away from housing projects so that second chamber S2 is enclosed with bump 312 by contact chip 12
Become.So, the space of second chamber S2 is extended, and the meaning after this spatial spread is, when contact chip 12 action,
Air compression ratio in this space reduces, and resistance during contact chip 12 action reduces, and is conducive to improving the action of contact chip 12
Sensitivity.
Contact chip 12 after action can realize electrical contact with conducting strip 22, and wherein, it is remote that conducting strip 22 is located at coping plate 31
The side of ionization electrode assembly, and with coping plate 31 insulation set.Conducting strip 22 can be entirely located in the inside of second chamber S2,
The outside of second chamber S2 can be entirely located in.When conducting strip 22 be entirely located in second chamber S2 outside when, contact chip 12 with
The heat producing during conducting strip 22 electrical contact can more easily be disperseed by conduction.
In the present embodiment, a part for conducting strip 22 is arranged in second chamber S2, and remainder is located at second chamber
Outside 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 Figure 1-3, contact chip 12 attaches on the first terminal 11, and conducting strip 22 is arranged on coping plate 31
Top and be connected, wherein, conducting strip 22 and coping plate 31 insulation set with Second terminal 21, conducting strip 22 is from Second terminal 21
Place extends towards the side of the first terminal 11, and coping plate 31 offers through hole 313, and conducting strip 22 has and is convex to contact chip 12
Projection, this projection is the contact portion 221 with contact chip 12 electrical contact after action, and this contact portion 221 is stretched
Enter through hole 313 and be located in second chamber S2, the setting of contact portion 221 facilitates radiating and the conducting strip 22 of conducting strip 22
The setting at interval and contact chip 12 between, this interval enables to contact with each other in contact chip 12 action between the two, is connecing
Being capable of mutually insulated before contact 12 action.
As shown in figure 3, having the first contact plane 221a on conducting strip 22, correspondingly, contact chip 12 has the second contact
Plane 121a, when contact chip 12 is contacted with conducting strip 22, the first contact plane 221a is fitted with the second contact plane 121a.This
One scheme is so that contact chip 12 has larger contact area with conducting strip 22 when contacting, reliable between the two to ensure
In electrical contact.
As shown in figure 3, according to an embodiment, contact chip 12 includes plush copper 121 and turning part 122, wherein, turning part
122 is sheet annuli arrangement, and this is conducive to contact chip 12 to deform under gas pressure and action message, and plush copper 121 is connected to turns over
Transfer part 122 and the side protrusion towards coping plate 31, when contact chip 12 action, contact chip 12 by plush copper 121 and can be led
Electric piece 22 contacts.In the program, the setting of plush copper 121 is so that leave appropriate intervals between contact chip 12 and conducting strip 22
On the basis of reduce contact chip 12 upset stroke, improve the security of secondary cell.Further, plush copper 121 and turning part 122
It can be integral type structure.
For conducting strip 22, conducting strip 22 maintains static, and contact portion 221 is made towards a side surface of contact chip 12
For the first contact plane 221a.For contact chip 12, can deform it is contemplated that at plush copper 121 after contact chip 12 action
Deflection relatively small, this plush copper 121 keeps flat state substantially towards a side surface of conducting strip 22, therefore, this plush copper
121 can be used as the second contact plane 121a towards the surface of conducting strip 22.
In embodiment shown in Fig. 1-2, one end of conducting strip 22 is connected at Second terminal 21, other end direction first
The side of terminal 11 extends, therefore, conducting strip 22 is fixed for one end, the other end for free end cantilever design, with contact chip
During 12 contacts, conducting strip 22 can be led to produce displacement in the presence of contact force, cause both loose contacts.In order to gram
Take drawbacks described above it may be preferred to arrange attachment structure in the free end of conducting strip 22, the free end of conducting strip 22 is fixed, should
Attachment structure can be realized by the structure of bonding it is also possible to be realized by the snap-in structure cooperating.
In the embodiment shown in Figure 2, secondary cell includes insulating component 23, and insulating component 23 is coated on conducting strip 22
Outside, on the one hand, by the cladding of insulating component 23 so that both are embedded together, insulating component 23 is towards the first terminal
11 are extended and possibly fixed at the first terminal 11, after being arranged such, by the support of insulating component 23 so that conducting strip 22 outstanding
Arm configuration is eased, and reduces the phenomenon of conducting strip 22 and contact chip 12 loose contact.
On the other hand, by the cladding of insulating component 23, conducting strip 22 is only exposed the contact being contacted with contact chip 12
Part 221, and the part with Second terminal 21 conducting, avoid the conducting with coping plate 31 with this, realize conducting strip 22 and top
The insulation of cover plate 31.
In embodiment shown in Fig. 2-4, the first terminal 11 includes the terminal body 111 being connected and extension 112,
Extension 112 extends towards the side of Second terminal 21, and extension 112 offers opening 112a, the outward flange of turning part 122
Be sealedly connected on extension 112 so that contact chip 12 sealing opening 112a, and by first chamber S1 and second chamber S2 every
Open, and this opening 112a is just right with the through hole 313 on coping plate 31, plush copper 121 is arranged on the middle part of turning part 122, this
Sample, when contact chip 12 action, plush copper 121 is contacted with contact portion 221 via opening 112a and through hole 313.Wherein, for
Pole piece and external circuit realize the part of electrical connection in terminal body 111, and extension 112 is used for being connected with contact chip 12,
Facilitate setting on the first terminal 11 for the contact chip 12.
When containment member 13 and the first terminal 11 are in sealing contact, containment member 13 is actually sealed with extension 112
Contact, secondary sealing area 132 is containment member 13 surface in sealing contact with extension 112.Specifically, implemented according to one
Example, as in Figure 3-5, extension 112 includes body 112b and cylindrical body 112c, and opening 112a is opened on body 112b,
Cylindrical body 112c extends along the edge of opening 112a towards the side of coping plate 31 from body 112b, containment member 13 with logical
The inner wall sealing contact in hole 313 forms primary sealing area 131, formation second sealing in sealing contact with the outer peripheral face of cylindrical body 112c
Face 132.The program achieve primary sealing area 131 with secondary sealing area 132 being oppositely arranged along the bearing of trend of coping plate 31,
And structure is simple, facilitates implementation.
Further, as shown in figure 4, the sealing of the axis around cylindrical body 112c is offered on the outer peripheral face of cylindrical body 112c
Groove 112ca, containment member 13 is embedded in sealed groove 112ca, and now, secondary sealing area 132 is with sealed groove 112ca's
Sealing bottom surface contacts, and the program ensure that containment member 13 will not shift in sealed groove 112ca, improves containment member 13
Stability, thus improve the reliability of sealing.
Further, in sealed groove 112ca, the shape of the outer contour of containment member 13 and sealed groove 112ca
The shape of inner outline be adapted.So, this containment member 13 and the contact area in sealed groove 112ca increase,
Its sealing effectiveness is strengthened, and meanwhile, shifting amount in sealed groove 112ca for the containment member 13 can reduce further.
The sealing means of containment member 13 and the first terminal 11 are not limited only to described above, in some other embodiment
In, seal groove can also be opened up on coping plate 31, containment member 13 is arranged in seal groove and is connect with the sealing of cylindrical body 112c
Touch.
In other embodiment, containment member 13 can also be arranged between coping plate 31 and contact chip 12, and root
According to the requirement of sealing structure, correspondingly modification is carried out to the structure of contact chip 12, for example, increase the thickness of the edge of contact chip 12
Degree so that coping plate 31 and contact chip 12 secondary cell short transverse formed can with the part of grip seal component 13,
Thus primary sealing area and the secondary sealing area that the bearing of trend along coping plate 31 is oppositely arranged is formed on containment member 13.
In embodiment shown in Fig. 4-5, terminal body 111 is integral type structure with extension 112, however, it is desirable to say
Bright, in some other embodiment, terminal body 111 and extension 112 can also adopt split-type structural, the application couple
This is not construed as limiting.
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 (10)
1. a kind of secondary cell, including：Electrode assemblie, the first terminal and Second terminal and coping plate and housing, its feature exists
In,
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,
Described secondary cell also includes：Containment member, attach to described the first terminal contact chip and with described Second terminal
The conducting strip of electrical connection,
Described coping plate and at least one of described the first terminal and described Second terminal insulation set,
When the internal pressure of described secondary cell exceedes reference pressure, described contact chip under gas pressure action and with described
Conducting strip contacts,
Described coping plate and described housing cover the first chamber being formed for encapsulating described electrode assemblie and are described contact chip
There is provided the second chamber of motion space, described first chamber is separated by described contact chip with described second chamber,
Described containment member is sealed between described first chamber and second chamber, and described containment member has and described coping plate
Primary sealing area in sealing contact and the secondary sealing area in sealing contact with described the first terminal or described contact chip, described
One sealing surface is oppositely arranged along the bearing of trend of described coping plate with described secondary sealing area.
2. secondary cell according to claim 1 is it is characterised in that described the first terminal is electrically connected with described coping plate,
Described Second terminal and described coping plate and described conducting strip insulation set.
3. secondary cell according to claim 1 is it is characterised in that offer through hole on described coping plate, described conduction
Piece has the contact portion that can contact with the described contact chip after action, and described contact portion stretches into described through hole and is located at institute
State in second chamber.
4. secondary cell according to claim 3 it is characterised in that described coping plate include the body part that is connected and
Bump, the side that described bump is directed away from described housing projects, and described second chamber is by described contact chip and institute
State bump to surround, and described through hole is arranged on described bump.
5. secondary cell according to claim 3 is it is characterised in that described the first terminal includes the terminal body being connected
And extension,
Offer opening on described extension, described contact chip is sealedly connected at described opening, by described first chamber with
Described second chamber separates,
When described containment member and described the first terminal are in sealing contact, described secondary sealing area be described containment member with described
Extension surface in sealing contact.
6. secondary cell according to claim 5 is it is characterised in that described terminal body and described extension are integral type
Structure or split-type structural.
7. secondary cell according to claim 5 is it is characterised in that described extension includes body and cylindrical body,
Described opening opens up on the body, described cylindrical body from described body along described opening edge towards described
The side of coping plate extends,
Described containment member contacts the described primary sealing area of formation, the periphery with described cylindrical body with the inner wall sealing of described through hole
Face is in sealing contact to form described secondary sealing area.
8. secondary cell according to claim 7 is it is characterised in that offer on the outer peripheral face of described cylindrical body around institute
State the sealed groove of the axis of cylindrical body, described containment member is embedded in described sealed groove, described secondary sealing area and institute
State the sealing bottom surface contact of sealed groove.
9. secondary cell according to claim 8 is it is characterised in that in described sealed groove, described containment member
The shape of outer contour is adapted with the shape of the inner outline of described sealed groove.
10. secondary cell according to claim 5 is it is characterised in that described contact chip includes turning part and plush copper,
Turning part is sheet 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 coping plate.
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| CN201611005190.1A CN106410074B (en) | 2016-11-15 | 2016-11-15 | Secondary battery |
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| CN201611005190.1A CN106410074B (en) | 2016-11-15 | 2016-11-15 | Secondary battery |
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| CN106410074A true CN106410074A (en) | 2017-02-15 |
| CN106410074B CN106410074B (en) | 2019-04-05 |
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| WO2018090178A1 (en) * | 2016-11-15 | 2018-05-24 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN110783503A (en) * | 2019-10-23 | 2020-02-11 | 江西赣锋电池科技有限公司 | Secondary battery top cap reaches secondary battery who contains it |
| CN114421038A (en) * | 2022-03-30 | 2022-04-29 | 宁德新能源科技有限公司 | Battery cell sealing assembly, battery, electric equipment and battery cell sealing method |
| CN116365128A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
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| CN101950812A (en) * | 2009-07-09 | 2011-01-19 | Sb锂摩托有限公司 | Rechargeable battery |
| CN102738522A (en) * | 2011-03-30 | 2012-10-17 | Sb锂摩托有限公司 | Secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101950812A (en) * | 2009-07-09 | 2011-01-19 | Sb锂摩托有限公司 | Rechargeable battery |
| CN102738522A (en) * | 2011-03-30 | 2012-10-17 | Sb锂摩托有限公司 | Secondary battery |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018090178A1 (en) * | 2016-11-15 | 2018-05-24 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN110783503A (en) * | 2019-10-23 | 2020-02-11 | 江西赣锋电池科技有限公司 | Secondary battery top cap reaches secondary battery who contains it |
| CN110783503B (en) * | 2019-10-23 | 2022-07-05 | 江西赣锋电池科技有限公司 | Secondary battery top cap reaches secondary battery who contains it |
| CN114421038A (en) * | 2022-03-30 | 2022-04-29 | 宁德新能源科技有限公司 | Battery cell sealing assembly, battery, electric equipment and battery cell sealing method |
| CN114421038B (en) * | 2022-03-30 | 2022-06-17 | 宁德新能源科技有限公司 | Battery cell sealing assembly, battery, electric equipment and battery cell sealing method |
| CN116365128A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116365128B (en) * | 2023-05-31 | 2023-08-15 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
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|---|---|
| CN106410074B (en) | 2019-04-05 |
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Effective date of registration: 20191218 Address after: 213300 No. 1000, Chengbei Avenue, Kunlun Street, Liyang City, Changzhou City, Jiangsu Province Patentee after: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. (JIANGSU) Address before: 352100, Xingang Road, Ningde Town, Jiaocheng District, Fujian, 1 Patentee before: Contemporary Amperex Technology Co.,Ltd. |