CN106450120A - Secondary battery and battery module - Google Patents
Secondary battery and battery module Download PDFInfo
- Publication number
- CN106450120A CN106450120A CN201611003970.2A CN201611003970A CN106450120A CN 106450120 A CN106450120 A CN 106450120A CN 201611003970 A CN201611003970 A CN 201611003970A CN 106450120 A CN106450120 A CN 106450120A
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- Prior art keywords
- terminal
- rotating sheet
- pole piece
- coping plate
- secondary cell
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application relates to the technical field of energy storage device production, in particular to a secondary battery and a battery module. The secondary battery includes a first terminal, a second terminal, a top cover sheet, an electrode assembly, a first flip sheet and a second flip sheet, at least one of the first terminal and the second terminal being electrically insulated from the top cover sheet, the first flip sheet being attached to the first terminal, the second flip sheet being attached to the second terminal; in a normal state, the first pole piece is electrically connected with the first terminal through the first turnover piece, and the second pole piece is electrically connected with the second terminal through the second turnover piece; when the pressure in the secondary battery exceeds the reference pressure, the first turnover sheet and the second turnover sheet can turn over, so that the first terminal and the second terminal are electrically connected; and the first turning sheet is disconnected from the electric connection state with the first pole piece, and/or the second turning sheet is disconnected from the electric connection state with the second pole piece. Even if the automobile is in the running state, the automobile can not be suddenly flamed out, and the safety of the automobile is improved.
Description
Technical field
The application is related to energy storage device production technical field, more particularly, to a kind of secondary cell and battery modules.
Background technology
For EV duricrust battery, in order to solve to overcharge problem, the commonly used scheme of industry is to cut before battery core loses efficacy
Power-off pond major loop, prevents battery from continuing to charge, to ensure cell safety.Common structure is：In the first terminal and electrode group
The major loop of part electrical connection arranges failure of current structure, and Second terminal is electrically insulated with failure of current structure, all the time when battery mistake
Fill, internal aerogenesis, internally air pressure increases to activated current cut-out structure during certain value, makes between the first terminal and electrode assemblie
Open circuit, prevents battery from continuing to charge.
However, in addition to overcharging, during normal use, may be also due to unexpected internal short-circuit leads to internal product
Gas, activated current cuts off structure, makes to form open circuit between the first terminal and electrode assemblie, if now automobile is just under steam,
And in battery modules each secondary cell by the way of series connection, because the first terminal and Second terminal are still in electric insulation shape
State, will lead to whole battery modules that power-off occurs, and cause automobile to stop working suddenly, even result in serious accident.
Content of the invention
This application provides a kind of secondary cell and battery modules, can solve the problem that the problems referred to above.
The first aspect of the application provides a kind of secondary cell, including the first terminal, Second terminal, coping plate, electrode
Assembly, the first rotating sheet and the second rotating sheet,
Described electrode assemblie includes the first pole piece, the second pole piece and is located between described first pole piece and described second pole piece
Dividing plate；
In described the first terminal and described Second terminal, at least one is electrically insulated with described coping plate,
Described first rotating sheet attaches to described the first terminal, and described second rotating sheet attaches to described Second terminal；
During normality, described first pole piece is electrically connected with described the first terminal by described first rotating sheet, described second pole
Piece is electrically connected with described Second terminal by described second rotating sheet；
When the pressure in described secondary cell exceedes reference pressure, described first rotating sheet and described second rotating sheet energy
Enough overturn, described first rotating sheet after upset and described second rotating sheet are electrically connected with described coping plate respectively, make described the
One terminal and the electrical connection of described Second terminal；And described first rotating sheet disconnects the electrical connection shape of itself and described first pole piece
State, and/or described second rotating sheet disconnects the status of electrically connecting of itself and described second pole piece.
Preferably, also include the housing covering with described coping plate, described coping plate and described housing surround receiving space,
Described receiving space include for accommodate described electrode assemblie first chamber, provide upset space for described first rotating sheet
Second chamber and the 3rd chamber providing upset space for described second rotating sheet, described first chamber is respectively with described second
Chamber, described 3rd chamber do not connect.
Preferably, described the first terminal includes interconnective the first terminal body and the first extension, and described first prolongs
Extending portion is provided with the first through hole relative with described coping plate, and described first rotating sheet attaches to described first extension, and seals
Described first through hole,
And/or
Described Second terminal includes interconnective Second terminal body and the second extension, and described second extension is provided with
Second through hole relative with described coping plate, described second rotating sheet attaches to described second extension, and seals described second
Through hole.
Preferably, described the first terminal includes interconnective the first terminal body and the first extension；Also include realizing
The first seal of sealing between described first chamber and described second chamber, described first seal is sealedly attached to described the
Between one extension and described coping plate.
Preferably, described Second terminal includes interconnective Second terminal body and the second extension, also includes realizing
The second seal of sealing between described first chamber and described 3rd chamber, described second seal is sealedly attached to described the
Between two extensions and described coping plate.
Preferably, in described first rotating sheet and described second rotating sheet, at least one overturns structure for convex type, described
Convex type upset structure includes turning part and the first plush copper,
Described first plush copper is connected to turning part, and the direction being located to institute's coping plate is protruded；
Turning part is sheet annuli arrangement,
When described first rotating sheet is described convex type upset structure, the side of the turning part of described first rotating sheet
Edge is connected with described the first terminal；Under normality, described the first terminal by the turning part of described first rotating sheet with described
First pole piece electrical connection；
When described second rotating sheet is described convex type upset structure, the side of the turning part of described second rotating sheet
Edge is connected with described Second terminal；Under normality, described Second terminal by the turning part of described second rotating sheet with described
Second pole piece electrical connection.
Preferably, described convex type upset structure also includes connecting portion, and described connecting portion is connected to the week of turning part
Edge, the thickness of described connecting portion is more than the thickness of turning part, and turning part is connected to described the by described connecting portion
The inwall of one through hole or the inwall of described second through hole.
Preferably, also include the first conducting strip, during normality, described first pole piece passes sequentially through described first conducting strip, institute
State the first rotating sheet to electrically connect with described the first terminal；When the pressure in described secondary cell exceedes reference pressure, described
One rotating sheet can overturn makes described first conducting strip disconnect, thus disconnecting being electrically connected of described the first terminal and described first pole piece
Connect shape；
And/or
Also include the second conducting strip, during normality, described second pole piece passes sequentially through described second conducting strip, described second turns over
Rotor is electrically connected with described Second terminal；When the pressure in described secondary cell exceedes reference pressure, described second rotating sheet
Can overturn and so that described second conducting strip is disconnected, thus disconnecting the status of electrically connecting of described Second terminal and described second pole piece.
Preferably, also include resistance unit, described Second terminal passes through institute with described coping plate electric insulation, described the first terminal
State resistance unit to electrically connect with described coping plate, the resistance of described resistance unit is 1～100000 ohm.
The second aspect of the application provides a kind of battery modules, including the secondary cell described in as above any one, and respectively
Described secondary cell is serially connected.
The technical scheme that the application provides can reach following beneficial effect：
Secondary cell provided herein, is respectively provided with the first rotating sheet, the second upset in the first terminal, Second terminal
Piece, when battery overcharges, the first rotating sheet, the second rotating sheet all overturn, the first rotating sheet and the first pole piece disconnect and/or
Second rotating sheet and the second pole piece disconnect, and the first rotating sheet, the second rotating sheet are all electrically connected with coping plate, so that first end
Son is conducted with Second terminal, and now, even if battery modules adopt series system, this secondary cell can be used as wire, still
So keep whole battery modules to be in channel status, therefore, even if automobile is in running status, also will not stop working suddenly, improve
The security of automobile.
It should be appreciated that above general description and detailed description hereinafter are only exemplary, can not be limited this
Application.
Brief description
A kind of structural representation of specific embodiment of secondary cell that Fig. 1 is provided herein；
A kind of explosive view of specific embodiment of secondary cell that Fig. 2 is provided herein；
Fig. 3 is the sectional view in Fig. 1 along line A-A；
A kind of partial schematic diagram of specific embodiment of secondary cell that Fig. 4 is provided herein；
Fig. 5 is secondary cell protrusions formula upset a kind of structural representation of specific embodiment of structure provided herein
Figure；
Fig. 6 is a kind of structural representation of specific embodiment of thinning conducting strip in secondary cell provided herein；
A kind of another partial structural diagram of specific embodiment of secondary cell that Fig. 7 is provided herein.
Reference：
10- coping plate；
101- first row pore；
20- the first terminal；
201- the first terminal body；
202- first extension；
21- first conducting block；
22- the 3rd insulating part；
23- the 4th insulating part；
24- the 3rd seal；
30- Second terminal；
301- Second terminal body；
302- second extension；
31- second conducting block；
32- the 5th insulating part；
33- the 6th insulating part；
34- the 4th sealing ring；
50- resistance unit；
70a- first rotating sheet；
70b- second rotating sheet；
701- turning part；
702- first plush copper；
703- second plush copper；
704- connecting portion；
705- installs raised；
71a- first conducting strip；
71b- second conducting strip；
711- first conductive part；
712- thinning area；
713- second conductive part；
714- first passage；
715- second passage；
72a- first insulating part；
72b- second insulating part；
73a- first seal；
73b- second seal.
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.
As shown in figs. 1-7, the embodiment of the present application provides a kind of secondary cell, including the first terminal 20, Second terminal 30,
Coping plate 10, electrode assemblie (not shown), the first rotating sheet 70a and the second rotating sheet 70b, secondary cell also includes and top
The housing (not shown) that cover plate 10 covers.Electrode assemblie include the first pole piece, the second pole piece and the first pole piece and this
Dividing plate between two pole pieces.
Coping plate 10 seal casinghousing, the two surrounds receiving space.At least one of the first terminal 20 and Second terminal 30
It is electrically insulated with coping plate 10 and arranges, that is, the first terminal 20 and Second terminal 30 can be all electrically insulated with coping plate 10；Can also be only
One is electrically insulated with coping plate 10, and another one is electrically connected (as shown in Figure 3) with coping plate 10.First rotating sheet 70a attaches to
One terminal 20, the second rotating sheet 70b attaches to Second terminal 30.During normality, the first pole piece passes through the first rotating sheet 70a and first
Terminal 20 electrically connects, and the second pole piece is electrically connected with Second terminal 30 by the second rotating sheet 70b；When the pressure in secondary cell surpasses
When crossing reference pressure, the first rotating sheet 70a and the second rotating sheet 70b can overturn, the first rotating sheet 70a and second after upset
Rotating sheet 70b is electrically connected with coping plate 10 respectively, so that the first terminal 20 and Second terminal 30 is electrically connected；And the first rotating sheet
70a disconnects the status of electrically connecting of itself and the first pole piece, or the second rotating sheet 70b disconnects the electrical connection shape of itself and the second pole piece
State is it is also possible to the electrical connection of the status of electrically connecting of the first rotating sheet 70a and the first pole piece, the second rotating sheet 70b and the second pole piece
State all disconnects.
The secondary cell of above-described embodiment, the first terminal 20, Second terminal 30 be respectively provided with the first rotating sheet 70a,
Two rotating sheet 70b, when battery overcharges, the first rotating sheet 70a, the second rotating sheet 70b all overturn, the first rotating sheet 70a
Disconnect with the first pole piece and/or the second rotating sheet 70b and the disconnection of the second pole piece, and the first rotating sheet 70a, the second rotating sheet 70b
All electrically connect with coping plate 10, so that the first terminal 20 is conducted with Second terminal 30, now, even if battery modules are using string
Connection mode, this secondary cell can be used as wire, remains in that whole battery modules are in channel status, therefore, even if vapour
Car is in running status, also will not stop working suddenly, improves the security of automobile.
Usually, the first terminal 20, Second terminal 30 are respectively arranged in coping plate 10, for the ease of secondary cell and the external world
Electrical connection, the first terminal 20, Second terminal 30 can all stretch out coping plate 10, especially in the first terminal 20 or Second terminal
30 with coping plate 10 electric insulation when, coping plate 10 is stretched out in one end of electric insulation, and in such as Fig. 3, the first terminal 20, Second terminal 30 are equal
Stretch out coping plate 10.When the first terminal 20 or Second terminal 30 stretch out coping plate 10, in order to ensure the first terminal 20, second
Terminal 30 and the sealing of coping plate 10, generally pass through seal or sealant sealing, in such as Fig. 4, the first terminal 20 passes through
3rd seal 24 and coping plate 10 seal；In Fig. 7, Second terminal 30 is sealed with coping plate 10 by the 4th seal 34,
3rd seal 24, the 4th seal 34 can be sealing ring, sealing gasket etc..
In order to further facilitate the first terminal 20, Second terminal 30 and extraneous electrical connection, secondary cell also includes first
Conducting block 21 and the second conducting block 31, the first conducting block 21 contacts connection, the second conducting block 31 and the second end with the first terminal 20
Son 30 contact connects.
Specifically, the receiving space that coping plate 10 and housing surround includes first chamber for accommodate electrod assembly, is
First rotating sheet 70a provides the second chamber in upset space and the 3rd chamber providing upset space for the second rotating sheet 70b,
I.e. receiving space is divided into first chamber, second chamber and the 3rd chamber by the first rotating sheet 70a, the second rotating sheet 70b, and first
Chamber is not connected with second chamber, the 3rd chamber respectively, to ensure the first rotating sheet 70a, the second rotating sheet 70b in secondary cell
Interior pressure exceedes and can overturn during reference pressure.Wherein, second chamber can connect with the 3rd chamber it is also possible to not connect,
Preferably the two does not connect, to prevent the impact to the first rotating sheet 70a, the second rotating sheet 70b of the gas of two chambers.
The connection of the first terminal 20 and the first rotating sheet 70a for convenience, the first terminal 20 includes interconnective first
Terminal body 201 and the first extension 202, as shown in figure 3, the first terminal body 201 passes through the 3rd seal 24 and coping plate
10 sealings, the first extension 202 and coping plate 10 pass through first seal 73a or fluid sealant etc. and seal, in the first terminal 20
When stretching out coping plate 10, coping plate 10 is stretched out in one end of usual the first terminal body 201.The first terminal body 201 prolongs with first
Extending portion 202 can be structure as a whole or Split type structure.The first terminal 20 is provided with first relative with coping plate 10 and leads to
Hole, when including the first extension 202, located at the first extension 202, the first rotating sheet 70a attaches to first and prolongs first through hole
Extending portion 202, and the first rotating sheet 70a sealing first through hole.
Specifically, first chamber and the sealing of second chamber can be realized by first seal 73a or fluid sealant etc.,
Usually, first seal 73a is outer circumferentially disposed along the first rotating sheet 70a.When being realized by first seal 73a, the
One seal 73a can be sealedly attached between the first terminal 20 and coping plate 10 that (sealing is even when being provided with the first extension 202
It is connected between the first extension 202 and coping plate 10), or first seal 73a is sealedly attached to the first rotating sheet 70a and top
Between cover plate 10.First seal 73a has the primary sealing area in sealing contact with coping plate 10, and with the first extension
202 or the first rotating sheet 70a secondary sealing area in sealing contact, generally, primary sealing area and secondary sealing area are in coping plate
In 10 short transverse relatively.
In the same manner, the connection of Second terminal 30 and the second rotating sheet 70b for convenience, Second terminal 30 includes interconnective
Second terminal body 301 and the second extension 302, as shown in fig. 7, usually, Second terminal body 301 passes through the 4th seal
34 are sealed with coping plate 10, and the second extension 302 and coping plate 10 pass through second seal 73b or fluid sealant etc. and seal,
When Second terminal 30 stretches out coping plate 10, coping plate 10 is stretched out in one end of usual Second terminal body 301.Second terminal body
301 and second extension 302 can be structure as a whole or Split type structure.Second terminal 30 is provided with and coping plate 10 phase
To the second through hole, include the second extension 302 when, located at the second extension 302, the second rotating sheet 70b is attached for the second through hole
It is connected to the second extension 302, and the second rotating sheet 70b seals the second through hole.
Specifically, first chamber and the sealing of the 3rd chamber can be realized by second seal 73b or fluid sealant etc.,
Usually, second seal 73b is outer circumferentially disposed along the second rotating sheet 70b.When being realized by second seal 73b, the
Two seal 73b can be sealedly attached between Second terminal 30 and coping plate 10 that (sealing is even when being provided with the second extension 302
It is connected between the second extension 302 and coping plate 10), or second seal 73b is sealedly attached to the second rotating sheet 70b and top
Between cover plate 10.Second seal 73b has threeth sealing surface in sealing contact with coping plate 10, and with the second extension
302 or second rotating sheet 70b the 4th sealing surface in sealing contact, generally, the 3rd sealing surface and the 4th sealing surface are in coping plate
In 10 short transverse relatively.
It is of course also possible to only the first terminal 20 includes the first terminal body 201 and the first extension 202, or only second
Terminal 30 includes Second terminal body 301 and the second extension 302.
When one of the first terminal 20 and Second terminal 30 are electrically connected with coping plate 10, secondary cell can also include
Resistance unit 50, one of is electrically connected with coping plate 10 and to be electrically connected with coping plate 10 by resistance unit 50, with the first terminal 20 and top
Cover plate 10 electrically connects, and as a example Second terminal 30 is electrically insulated with coping plate 10, is electrically insulated with coping plate 10 for the first terminal 20, the
Two-terminal 30 is electrically connected with coping plate 10, as long as doing adaptive replacement.As shown in figure 3, the first terminal 20 passes through resistance
Part 50 is electrically connected with coping plate 10, by increasing resistance unit 50, can reduce short circuit and return when secondary cell carries out drift bolt test
The electric current on road is it is ensured that the security of drift bolt.Resistance unit 50 can be column structure or laminated structure.
Include the first conducting block 21 when, resistance unit 50 between coping plate 10 and the first conducting block 21, coping plate 10
Electrically connected with the first terminal 20 by resistance unit 50, the first conducting block 21.When resistance unit 50 is column structure, the first conducting block
Pass through the 4th insulating part 23 or insulated paint, insulating cement electric insulation, i.e. the first conducting block 21 and top cover between 21 and coping plate 10
It is not directly contacted with formation electrical connection between piece 10, electrical connection need to be realized by resistance unit 50, resistance unit 50 passes through the 4th insulating part
After 23, two ends are connected with the first conducting block 21, coping plate 10 respectively.When resistance unit 50 is laminated structure, the first conducting block 21,
Resistance unit 50 can be stacked with coping plate 10, to increase the reliability of connection.
Further, coping plate 10 is provided with the first groove, one end insertion first that resistance unit 50 is electrically connected with coping plate 10
Groove；And first conducting block 21 be provided with the second groove, the other end of resistance unit 50 inserts the second groove, to prevent resistance unit 50
Dislocation；It is of course also possible to only coping plate 10 is provided with the first groove, or the first conducting block 21 is provided with the second groove.
Wherein, when including the second conducting block 31, Second terminal 30 with coping plate 10 electric insulation, secondary cell also includes the
Six insulating parts 33, are provided with the 6th insulating part 33, it is exhausted that the second conducting block 31 passes through the 6th between the second conducting block 31 and coping plate 10
Edge part 33 is electrically insulated with coping plate 10.
In order that the damage of drift bolt is preferably minimized, the resistance of resistance unit 50 is usually 1～100000 ohm, such as 1 ohm,
100 ohm, 1000 ohm, 100000 ohm.
In the various embodiments described above, the first rotating sheet 70a and the second rotating sheet 70b can be convex type upset structure,
Structure can be overturn for convex type with only one, so that the first rotating sheet 70a is for convex type upset structure as a example illustrate below.
As in Figure 3-5, convex type upset structure includes turning part 701 and the first plush copper 702, and the first plush copper 702 connects
In turning part 701, usual first plush copper 702 is connected to the central area of turning part 701, and convex to the direction at coping plate 10 place
Go out；Turning part 701 is sheet annuli arrangement.When the first rotating sheet 70a is for convex type upset structure, the first rotating sheet 70a's
The edge of turning part 701 is connected with the first terminal 20, so that in normality, the first terminal 20 passes through the upset of the first rotating sheet 70a
Portion 701 is electrically connected with the first pole piece.By increasing by the first plush copper 702, the first rotating sheet 70a can be reduced with coping plate 10 each
From reverses direction on distance, so that when overcharging, the first rotating sheet 70a can be contacted with coping plate 10 rapidly.
In order to reduce the stroke of the first rotating sheet 70a upset further, and ensure the first rotating sheet 70a and the first pole piece
Connection reliability, convex type upset structure also include the second plush copper 703, the second plush copper 703 is connected to turning part 701, and convex
The direction being located to electrode assemblie, during normality, turning part 701 is electrically connected with the first pole piece by the second plush copper 703.
Be planar structure generally, due to coping plate 10, the first pole piece, therefore, correspondingly the end face of the first plush copper 702, the
The end face of two plush coppers 703 is also planar structure, to increase the first upset after the first rotating sheet 70a and the first pole piece and upset
Piece 70a and the contact area of coping plate 10.
The turning part 701 of the first rotating sheet 70a can be entirely located in first through hole it is also possible to be connected to first through hole
End, the periphery of the turning part 701 of the turning part 701 of the preferably first rotating sheet 70a is connected to the inwall of first through hole, to shorten
The upset stroke of the first rotating sheet 70a, ensures the connection reliability with the first pole piece, coping plate 10 respectively before and after upset simultaneously.
Further, in order to ensure the reliability that the first rotating sheet 70a is connected, the periphery of turning part 701 with coping plate 10
It is additionally provided with connecting portion 704, the thickness of connecting portion 704 is more than the thickness of turning part 701, thickness refers to convex type upset structure and turns over along it
Turn the size in direction, the turning part 701 of the first rotating sheet 70a is connected through portion 704 and is connected to first through hole.
Wherein, first through hole is preferably shoulder hole, as shown in figure 4, the connecting portion 704 of the first rotating sheet 70a is overlapped in
The cascaded surface of one through hole, when the first rotating sheet 70a is provided only with turning part 701 it is also possible to turning part 701 is overlapped in first through hole
Cascaded surface, said structure, the position of the first rotating sheet 70a can be limited, prevent in normality, due to the first rotating sheet 70a
It is connected with the first terminal 20 and loosens, cannot contact with coping plate 10 after causing the first rotating sheet 70a upset.
The convenience connecting for the first rotating sheet 70a, secondary cell also includes the first conducting strip 71a, as shown in figure 4,
During normality, the first pole piece passes sequentially through the first conducting strip 71a, the first rotating sheet 70a is electrically connected with the first terminal 20；When secondary electricity
When pressure in pond exceedes reference pressure, the first rotating sheet 70a can overturn makes the first conducting strip 71a disconnect, thus disconnecting the
One terminal 20 and the status of electrically connecting of the first pole piece, by increasing by the first conducting strip 71a, conveniently process and assemble.
In the same manner, the convenience connecting for the second rotating sheet 70b, secondary cell also includes the second conducting strip 71b, such as Fig. 7
Shown, during normality, the second pole piece passes sequentially through the second conducting strip 71b, the second rotating sheet 70b is electrically connected with Second terminal 30；When
When pressure in secondary cell exceedes reference pressure, the second rotating sheet 70b can overturn makes the second conducting strip 71b disconnect, thus
Disconnect the status of electrically connecting of Second terminal 30 and the second pole piece, by increasing by the second conducting strip 71b, conveniently process and assemble.
Specifically, the first conducting strip 71a and the second conducting strip 71b at least one be thinning conducting strip, lead with first below
As a example electric piece 71a is thinning conducting strip, as shown in fig. 6, thinning conducting strip includes the first conductive part 711, the second conductive part 713 and
Thinning area 712, thinning area 712 is located between the first conductive part 711 and the second conductive part 713, and its thickness is less than the first conduction
The thickness in portion 711 and the thickness of the second conductive part 713；Wherein, the first conductive part 711 is connected with the first rotating sheet 70a, first
When rotating sheet 70a is provided with the second plush copper 703, directly it is connected with second plush copper 703 of the first rotating sheet 70a；Second conductive part 713
It is connected with the first pole piece.During normality, the first rotating sheet 70a passes through first conductive part 711 of the first conducting strip 71a, thinning area
712nd, the second conductive part 713 is electrically connected with the first pole piece.By arranging thinning area 712, simultaneously by the first conductive part 711 and first
Rotating sheet 70a connects, and the second conductive part 713 is connected with the first pole piece, when the first rotating sheet 70a overturns, can be quickly by the
One conducting strip 71a breaks at thinning area 712, thus quickly realizing the open circuit in secondary cell.
Generally, thinning conducting strip is provided with passage, and passage is relative with the first rotating sheet 70a, as shown in Fig. 4,6, setting
First passage 714 or the second passage 715 are it is also possible to arrange the first passage 714 and the second passage 715 simultaneously.The
One passage 714, the second passage 715 overturn the thinning conducting strip of insertion in the reverses direction of structure in convex type, so that secondary
Gas in battery can be passed to the first rotating sheet 70a, and then makes the first rotating sheet 70a upset.It is being provided with turning part 701
When, during in order to ensure internal short-circuit aerogenesis, gas rapidly arrives at turning part 701, the second passage 715 and the first rotating sheet 70a
Turning part 701 relatively.
Further, in order to break thinning conducting strip under less pulling force, thinning area 712 can be provided with impression
And disconnecting unit, or it is provided only with one of impression and disconnecting unit, and wherein, when being provided with disconnecting unit, the first conductive part 711 and
Two conductive parts 713 disconnect in disconnecting unit.
Usual first conductive part 711 is additionally provided with installing hole, and convex type upset structure is provided with installation raised 705, installs raised
705 can be connected to the second plush copper 703, install raised 705 insertion installing holes, to ensure conducting strip 71 and the first rotating sheet 70a
Connection precision, and then ensure under default pulling force effect, thinning conducting strip can be broken.Installing hole can for through hole or
Person's blind hole, when for through hole, installing hole and the first passage 714 can be same through hole.
Directly contact in order to prevent the first conducting strip 71a and the first terminal 20 forms and electrically connect, the first conducting strip 71a and
Insulation system is passed through in the contact position of the first terminal 20, insulating cement or insulated paint are realized, and insulation system can be as the in Fig. 4
One insulating part 72a, the first insulating part 72a are located between the first conducting strip 71a and the first rotating sheet 70a, and the first insulating part 72a sets
Have a third through-hole, the first rotating sheet 70a, third through-hole and when being provided with the first conductive part 711 first conducting strip 71a first
Conductive part 711 is relatively.
Second conductive part 713 can be fixed by the modes such as bonding, screw and the first terminal 20 or Second terminal 30, is
Can be electrically disconnected with it rapidly after preferably fixing the first conducting strip 71a and then ensureing the first rotating sheet 70a upset, the first conduction
Piece 71a can be fixed on the first terminal 20, this mode by the first insulating part 72a, and the first insulating part 72a simultaneously works as insulating
With fixing effect, save amount of parts, simplify assembly process.
According to above-described embodiment, when the second rotating sheet 70b is it is only necessary to by above-described embodiment when convex type overturns structure
The first terminal 20 is changed to Second terminal 30, and first through hole is changed to the second through hole, such as the turning part 701 of the second rotating sheet 70b
Edge be connected with Second terminal 30, with normality, Second terminal 30 passes through the turning part 701 and the of the second rotating sheet 70b
Two pole piece electrical connections, when being provided with connecting portion 704, the turning part 701 of the second rotating sheet 70b passes through the company of the second rotating sheet 70b
Socket part 704 is connected to the inwall of the second through hole.
Equally, when the second conducting strip 71b is thinning conducting strip it is only necessary to be changed to the first terminal 20 in above-described embodiment
Second terminal 30, first through hole is changed to the second through hole, the first rotating sheet 70a is changed to the second rotating sheet 70b.
In the same manner, insulation system, insulating cement or insulated paint are passed through in fact in the second conducting strip 71b and the contact position of Second terminal 30
Existing, insulation system can be such as the second insulating part 72b in Fig. 7, and the second insulating part 72b is located at the second conducting strip 71b and second
Between rotating sheet 70b, the second insulating part 72b is provided with fourth hole, the second rotating sheet 70b, fourth hole and be provided with first
During conductive part 711, first conductive part 711 of the second conducting strip 71b is relative.Second conducting strip 71b can also pass through the second insulating part
72b is fixing with Second terminal 30.
Additionally, in order to avoid the air pressure of second chamber hinders the upset of the first rotating sheet 70a, coping plate 10 is additionally provided with first
Steam vent 101, first row pore 101 is relative with the first rotating sheet 70a, and the thickness direction insertion along coping plate 10.In the same manner, it is
The air pressure avoiding the 3rd chamber hinders the upset of the second rotating sheet 70b, and coping plate 10 is additionally provided with second row pore, second exhaust
Hole is relative with the second rotating sheet 70b, and the thickness direction insertion along coping plate 10.
Wherein, when the first terminal 20 or Second terminal 30 are with coping plate 10 electric insulation, insulating part, insulating cement can be passed through
Or insulated paint is realized, in such as Fig. 4, the first terminal 20 is electrically insulated with coping plate 10 by the 3rd insulating part 22；In Fig. 7, the
Two-terminal 30 is electrically insulated with coping plate 10 by the 5th insulating part 32.Wherein, the 3rd insulating part 22 is permissible with the first insulating part 72a
It is structure as a whole, the 5th insulating part 32 can also be structure as a whole with the second insulating part 72b.
In the various embodiments described above, generally, the first terminal 20 is positive terminal, and Second terminal 30 is negative terminal, correspondingly,
First pole piece is positive plate, and the second pole piece is negative plate, especially when the first terminal 20 is electrically connected with coping plate 10, to prevent electricity
The solution corrosion to housing for the liquid.It is of course also possible to the first terminal 20 is negative terminal, Second terminal 30 is positive terminal, correspondingly,
First pole piece is negative plate, and the second pole piece is positive plate.
The application also provides a kind of battery modules, the secondary cell providing including as above any embodiment.Secondary cell sets
Have multiple, can be parallel with one another between each secondary cell, also can be serially connected, especially in series connection, using any of the above-described enforcement
The secondary cell of example, even if occurring surprisingly to cause rotating sheet 70 to activate, is also not result in whole battery modules power-off, thus ensureing
The stability of battery modules.
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 is it is characterised in that include the first terminal, Second terminal, coping plate, electrode assemblie, the first upset
Piece and the second rotating sheet,
Described electrode assemblie include the first pole piece, the second pole piece and be located between described first pole piece and described second pole piece every
Plate；
In described the first terminal and described Second terminal, at least one is electrically insulated with described coping plate,
Described first rotating sheet attaches to described the first terminal, and described second rotating sheet attaches to described Second terminal；
During normality, described first pole piece is electrically connected with described the first terminal by described first rotating sheet, and described second pole piece leads to
Cross described second rotating sheet to electrically connect with described Second terminal；
When the pressure in described secondary cell exceedes reference pressure, described first rotating sheet and described second rotating sheet can turn over
Turn, described first rotating sheet after upset and described second rotating sheet are electrically connected with described coping plate respectively, make described first end
Sub and described Second terminal electrical connection,
And described first rotating sheet disconnects the status of electrically connecting of itself and described first pole piece, and/or described second upset segment
Open the status of electrically connecting of itself and described second pole piece.
2. secondary cell according to claim 1 is it is characterised in that also include the housing covering with described coping plate, institute
State coping plate and surround receiving space with described housing, described receiving space includes the first chamber for accommodating described electrode assemblie
Room, the second chamber in upset space is provided for described first rotating sheet and provides the of upset space for described second rotating sheet
Three chambers, described first chamber is not connected with described second chamber, described 3rd chamber respectively.
3. secondary cell according to claim 2 is it is characterised in that described the first terminal includes interconnective first end
Sub- body and the first extension, described first extension is provided with the first through hole relative with described coping plate, described first upset
Piece attaches to described first extension, and seals described first through hole,
And/or
Described Second terminal includes interconnective Second terminal body and the second extension, and described second extension is provided with and institute
State the second relative through hole of coping plate, described second rotating sheet attaches to described second extension, and seal described second through hole.
4. secondary cell according to claim 3 is it is characterised in that described the first terminal includes interconnective first end
Sub- body and the first extension；Also include realizing the first seal of sealing between described first chamber and described second chamber,
Described first seal is sealedly attached between described first extension and described coping plate.
5. secondary cell according to claim 3 is it is characterised in that described Second terminal includes interconnective second end
Sub- body and the second extension, also include realizing the second seal of sealing between described first chamber and described 3rd chamber,
Described second seal is sealedly attached between described second extension and described coping plate.
6. secondary cell according to claim 3 is it is characterised in that in described first rotating sheet and described second rotating sheet
At least one overturns structure for convex type, and described convex type upset structure includes turning part and the first plush copper,
Described first plush copper is connected to turning part, and the direction being located to institute's coping plate is protruded；
Turning part is sheet annuli arrangement,
When described first rotating sheet is described convex type upset structure, the edge of turning part of described first rotating sheet with
Described the first terminal connects；Under normality, described the first terminal passes through the turning part and described first of described first rotating sheet
Pole piece electrically connects；
When described second rotating sheet is described convex type upset structure, the edge of turning part of described second rotating sheet with
Described Second terminal connects；Under normality, described Second terminal passes through the turning part and described second of described second rotating sheet
Pole piece electrically connects.
7. secondary cell according to claim 6 also includes connecting portion it is characterised in that described convex type overturns structure,
Described connecting portion is connected to the periphery of turning part, and the thickness of described connecting portion is more than the thickness of turning part, described turns over
Transfer part is connected to the inwall of described first through hole or the inwall of described second through hole by described connecting portion.
8. the secondary cell according to any one of claim 1-7 is it is characterised in that also include the first conducting strip, during normality,
Described first pole piece passes sequentially through described first conducting strip, described first rotating sheet is electrically connected with described the first terminal；When described
When pressure in secondary cell exceedes reference pressure, described first rotating sheet can overturn makes described first conducting strip disconnect, from
And disconnect the electrical connection shape of described the first terminal and described first pole piece；
And/or
Also include the second conducting strip, during normality, described second pole piece passes sequentially through described second conducting strip, described second rotating sheet
Electrically connect with described Second terminal；When the pressure in described secondary cell exceedes reference pressure, described second rotating sheet can
Upset makes described second conducting strip disconnect, thus disconnecting the status of electrically connecting of described Second terminal and described second pole piece.
9. the secondary cell according to any one of claim 1-7 is it is characterised in that also include resistance unit, described second end
Sub and described coping plate electric insulation, described the first terminal is electrically connected with described coping plate by described resistance unit, described resistance unit
Resistance be 1～100000 ohm.
10. a kind of battery modules it is characterised in that include at least two any one of claim 1-9 described in secondary cell, and
Each described secondary cell is serially connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003970.2A CN106450120B (en) | 2016-11-15 | 2016-11-15 | Secondary battery and battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003970.2A CN106450120B (en) | 2016-11-15 | 2016-11-15 | Secondary battery and battery module |
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| CN106450120B CN106450120B (en) | 2019-02-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784566A (en) * | 2017-01-16 | 2017-05-31 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN108428826A (en) * | 2018-01-18 | 2018-08-21 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap subassembly, secondary cell and car |
| CN109088040A (en) * | 2017-06-13 | 2018-12-25 | 三星Sdi株式会社 | Secondary cell with positive terminal and film integrated form cover board |
| CN109728208A (en) * | 2017-10-27 | 2019-05-07 | 宁德时代新能源科技股份有限公司 | Secondary cell's top cap subassembly, secondary cell and battery module |
| CN110492023A (en) * | 2019-08-15 | 2019-11-22 | 合肥国轩高科动力能源有限公司 | A kind of rectangular aluminum hull lithium battery cover plate |
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| CN102738522A (en) * | 2011-03-30 | 2012-10-17 | Sb锂摩托有限公司 | Secondary battery |
| CN105098108A (en) * | 2015-07-23 | 2015-11-25 | 宁德时代新能源科技有限公司 | Head cover structure of power battery and power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738522A (en) * | 2011-03-30 | 2012-10-17 | Sb锂摩托有限公司 | Secondary battery |
| CN105098108A (en) * | 2015-07-23 | 2015-11-25 | 宁德时代新能源科技有限公司 | Head cover structure of power battery and power battery |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784566A (en) * | 2017-01-16 | 2017-05-31 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN106784566B (en) * | 2017-01-16 | 2019-10-22 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN109088040A (en) * | 2017-06-13 | 2018-12-25 | 三星Sdi株式会社 | Secondary cell with positive terminal and film integrated form cover board |
| US11031621B2 (en) | 2017-06-13 | 2021-06-08 | Samsung Sdi Co., Ltd. | Secondary battery having positive electrode terminal-and-membrane integrated cap plate |
| CN109728208A (en) * | 2017-10-27 | 2019-05-07 | 宁德时代新能源科技股份有限公司 | Secondary cell's top cap subassembly, secondary cell and battery module |
| CN108428826A (en) * | 2018-01-18 | 2018-08-21 | 宁德时代新能源科技股份有限公司 | Secondary cell top cap subassembly, secondary cell and car |
| CN108428826B (en) * | 2018-01-18 | 2023-12-29 | 宁德时代新能源科技股份有限公司 | Secondary battery top cover components, secondary batteries, and automobiles |
| CN110492023A (en) * | 2019-08-15 | 2019-11-22 | 合肥国轩高科动力能源有限公司 | A kind of rectangular aluminum hull lithium battery cover plate |
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| Publication number | Publication date |
|---|---|
| CN106450120B (en) | 2019-02-22 |
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Effective date of registration: 20191224 Address after: 213300 No. 1000 North 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. |
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