CN205488328U

CN205488328U - Battery cell , battery module, power battery and electric automobile

Info

Publication number: CN205488328U
Application number: CN201620142796.9U
Authority: CN
Inventors: 谢秀梅; 周燕飞; 公绪斌
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2016-02-25
Filing date: 2016-02-25
Publication date: 2016-08-17
Anticipated expiration: 2026-02-25

Abstract

The utility model discloses a battery cell, battery module, power battery and electric automobile. This battery cell (100) including the shell, hold electric core in the shell, electrode terminals (101) is connected with this electricity core electricity and encapsulate apron (102) of shell, electrode terminals (101) set up on the apron (102), its characterized in that, battery cell (100) include with current interruption device (200) that electrode terminals (101) electricity is connected, these current interruption device (200) with the inside gaseous intercommunication of shell is in order breaking off down at gas pressure action the input or the output current of battery cell (100), wherein, current interruption device (200) are along radially extending apron (102).

Description

Cell, battery modules, electrokinetic cell and electric automobile

Technical field

This utility model relates to field of batteries, in particular it relates to a kind of cell, include the battery modules of this cell, including the electrokinetic cell of this battery modules with include the electric automobile of this electrokinetic cell.

Background technology

Battery all plays an important role in all trades and professions as energy-storage units, such as electrokinetic cell is widely used in the fields such as new-energy automobile, wherein can have in the battery bag of electrokinetic cell by multiple cells one-tenth in series or in parallel with each other battery modules to realize the work of discharge and recharge.Wherein, electrokinetic cell is in charge and discharge process, generally by BMS (battery management system) monitoring voltage and the change calculations charging state of electric current.If voltage sample goes wrong, it is possible to cause over-charging of battery, for ternary system, as overcharged the danger reaching the most more to there will be cells burst blast.

Existing technical scheme: the monitoring to the voltage and current of battery, calculates battery electric quantity by Current integrating method and open-circuit voltage method, and controls the charge and discharge management of battery with this.But there is also deficiency, such as battery voltage sampling or current sample lost efficacy, or software failure, cause battery to charge for a long time to can not get controlling, particularly in the case of charging pile charges, when charging pile and battery manager communication failures, overcharge uncontrollable, over-charging of battery to a certain extent, can cause battery blow-up the most on fire from explosion.

Therefore it provides a kind of current interruptions technology that can self can force to disconnect has positive effect.

Utility model content

The purpose of this utility model is to provide a kind of cell, and this monomer battery structure is ingenious can be forced disconnecting circuit when danger thus avoid dangerous generations such as battery explosion and highly sensitive.

The purpose of this utility model also resides in a kind of battery modules using this this cell of use of offer, uses the electrokinetic cell of this battery modules and uses the electric automobile of this electrokinetic cell.

To achieve these goals, this utility model provides a kind of cell, this cell includes shell, accommodates the electrode terminal that battery core in the enclosure electrically connects with this battery core and the cover plate encapsulating described shell, described electrode terminal is arranged on described cover plate, described cell includes the current interrupt device electrically connected with described electrode terminal, this current interrupt device connects with the internal gas of described shell to disconnect the input or output current of described cell under gas pressure, wherein, described current interrupt device extends radially out described cover plate.

Alternatively, described current interrupt device has electric-conductor and is connected the flip piece being electrically connected to each other with this electric-conductor, and described flip piece can disconnect under gas pressure with described electric-conductor and electrically connecting.

Alternatively, described electric-conductor being formed with indentation, this indentation is around the junction point setting for connecting described flip piece.

Alternatively, described electrode terminal includes that described current interrupt device is arranged on described pole, and wherein said electric-conductor is connected on the outer end end face of described pole to be electrically connected to each other through described cover plate the pole that electrically connects with described battery core.

Alternatively, described pole is fixing with described cover plate to be connected, and is formed with the described enclosure of connection and the inducing QI duct of described current interrupt device on described pole.

Alternatively, described current interrupt device is arranged on described cover plate, wherein said electric-conductor has the body being connected with described flip piece and extends to described electrode terminal the connecting portion being connected with this electrode terminal, described body and described enclosure gas communication from this body.

Alternatively, stating flip piece and be connected by boss Welding Structure with described electric-conductor, this boss Welding Structure includes boss, the connecting hole accommodating this boss and the annular solder joint between this boss and connecting hole.

Alternatively, described flip piece is formed as the first laminated structure, and this first laminated structure is formed with described connecting hole, and described electric-conductor is formed as the second laminated structure, and this second laminated structure is formed with described boss.

Alternatively, described indentation is oval, and described junction point is rounded connecting point, and staggers along the long axis direction of described ellipse with the center of circle of described junction point in the center of circle of described indentation.

Alternatively, described flip piece is coaxially disposed with described electrode terminal, and described electric-conductor is obliquely installed relative to the axis of described electrode terminal.

Alternatively, it is sealedly connected with ceramic ring between outer peripheral edge and the described cover plate of described flip piece.

This utility model also provides for a kind of battery modules, including multiple cells, it is characterized in that, the cell that at least one cell provides for this utility model, wherein between adjacent described cell, described current interrupt device mutually staggers with adjacent electrode terminal on the bearing of trend of short transverse and/or described cover plate.

Alternatively, between adjacent described cell, described current interrupt device mutually staggers with adjacent electrode terminal on the bearing of trend of described cover plate, and is connected by L-type connector between described current interrupt device with described adjacent electrode terminal.

Alternatively, described L-type connector has covering part and lead division, and described covering part covers and is connected in described current interrupt device, and described lead division extends to described adjacent electrode terminal.

Alternatively, between adjacent described cell, described current interrupt device mutually staggers with adjacent electrode terminal on the bearing of trend of described cover plate, described current interrupt device includes the block covering described flip piece, this block extends to align with described adjacent electrode terminal along described cover plate, and is connected by the electrode terminal that I type connector is adjacent with this.

Alternatively, the quantity of cell of described current interrupt device it is provided with less than three.

This utility model also provides for a kind of electrokinetic cell, including inclusion and the battery modules being arranged in this inclusion, it is characterised in that the battery modules that described battery modules provides for this utility model.

This utility model also provides for a kind of electric automobile, and this electric automobile is provided with the electrokinetic cell that this utility model provides.

By technique scheme, when battery occurs dangerous, can produce gas in battery, therefore along with the rising of air pressure, current interrupt device can disconnect the charge-discharge circuit of battery under gas pressure, then avoids battery air-pressure to continue to increase and explode.And it is owing to lifting surface area is big, highly sensitive.

Other feature and advantage of the present utility model will be described in detail in detailed description of the invention part subsequently.

Accompanying drawing explanation

Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes a part for description, is used for explaining this utility model, but is not intended that restriction of the present utility model together with detailed description below.In the accompanying drawings:

Fig. 1 is the decomposed schematic perspective view of this utility model the first embodiment medium power battery；

Fig. 2 is the plan structure schematic diagram of adjacent two cells in this utility model the first embodiment；

Fig. 3 is the sectional structure schematic diagram that the line A-A from Fig. 2 intercepts；

Fig. 4 is the decomposition texture schematic diagram of current interrupt device in this utility model the first embodiment；

Fig. 5 is flip piece and the decomposition texture schematic diagram of electric-conductor in this utility model the first embodiment；

Fig. 6 is the sectional structure schematic diagram in this utility model the first embodiment under flip piece and electric-conductor confined state；

Fig. 7 is the plan structure schematic diagram of electric-conductor in this utility model the first embodiment；

Fig. 8 is the sectional structure schematic diagram of another embodiment of pole during this utility model first is implemented；

Fig. 9 is the perspective view of another embodiment of pole in this utility model the first embodiment；

Figure 10 is pole and the sectional structure schematic diagram of another embodiment of ceramic ring in this utility model the first embodiment；

Figure 11 is pole and the perspective view of another embodiment of ceramic ring in this utility model the first embodiment；

Figure 12 is the structural representation of adjacent two another embodiments of cell in this utility model the first embodiment；

Figure 13 is the perspective view of this utility model the second embodiment medium power battery；

Figure 14 is the perspective view of cell in this utility model the second embodiment；

Figure 15 is the exploded perspective structural representation of cell in this utility model the second embodiment；

Figure 16 is flip piece and the exploded perspective structural representation of electric-conductor in this utility model the second embodiment；

Figure 17 is the broken section structural representation of cell in this utility model the second embodiment；

Figure 18 is the broken section structural representation of cell in this utility model the 3rd embodiment；

Figure 19 is the theory diagram of the control system that this utility model preferred implementation provides；

Figure 20 is the decomposition texture schematic diagram of the cell of a kind of embodiment of this utility model；

Figure 21 is the broken section structural representation after the cell in Figure 20 assembles；

Figure 22 is the broken section structural representation of cell in this utility model the 4th embodiment；

Figure 23 is the structural representation of current interrupt device in this utility model the 4th embodiment；

Figure 24 is the broken section structural representation of cell in this utility model the 5th embodiment.

Detailed description of the invention

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains this utility model, it is not limited to this utility model.

In this utility model, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower, left and right " typically defines on the basis of the page of respective drawings, and " inside and outside " refers to the interior and outer of corresponding component profile.

As shown in Fig. 1 to Figure 24, this utility model provides current interrupt device, cell, battery modules and the technical scheme of electrokinetic cell bag.Wherein current interrupt device is arranged in single cells, and multiple cells become battery modules by serial or parallel connection, it is possible to form electrokinetic cell in inserting battery bag.Additionally, in addition to electrokinetic cell field, the various technical schemes provided in this utility model can also be widely used in other field of batteries.Specifically; this utility model relates to cell 100,1100,2100,3100,4100 by the first to the 5th embodiment place of matchmakers; being directed to current interrupt device 200,1200,3200,4200 and explosion-proof valve 2200, additionally this utility model further relates to one and has electrokinetic cell charge and discharge protecting system.Below in conjunction with accompanying drawing, each embodiment is described in detail.

First, as shown in Fig. 1 to Figure 24, the each embodiment of this utility model is provided which a kind of battery modules, including multiple cells 100,1100,2100,3100,4100, wherein, cell can include shell, accommodate electrode terminal 101,1101,2101,3101,4101 and the cover plate 102,1102,2102,3102,4102 of package casing that battery core in the enclosure electrically connects with this battery core, wherein electrode terminal is arranged on the cover board, for the input and the output that complete electric current.Wherein, current interrupt device 200,1200,3200,4200 or explosion-proof valve 2200 is included in cell, this current interrupt device or explosion-proof valve electrically connect with electrode terminal, therefore by the effect of current interrupt device, can control input and the output of the electric current of electrode terminal.I.e. for the state of battery core conducting under current interrupt device or explosion-proof valve conventional sense in single cells, now electrode terminal can be normally carried out input and the output of electric current, to complete the charge/discharge operation of cell, and under precarious position, such as when overcharging occurs in battery, current interrupt device or explosion-proof valve can interrupt electric current input and the electric current output of electrode terminal, thus avoid battery problems such as overcharging occur.Accordingly, as important safety measure, the reliability of current interrupt device is most important, i.e. needs current interrupt device quickly to respond.Additionally, in each embodiment, wherein current interrupt device or explosion-proof valve can also be fixed relative to cover plate, i.e. current interrupt device or explosion-proof valve can be directly anchored on cover plate, can also be fixed on and arbitrarily be connected or on parts relatively-stationary with cover plate with cover plate, such as, be arranged on the electrode terminal on setting and cover plate.

In this utility model, current interrupt device in each embodiment or explosion-proof valve are the frame for movement of induction air pressure, and specifically, the enclosure gas communication of current interrupt device and cell also can act on the electric current that disconnection flows through under pneumatic pressure.Specifically can connect to come by the parts of breaking inner the transmission of interruptive current, thus cut off the discharge and recharge of battery in time.The air pressure source wherein utilized is: when overcharging occurs in such as battery etc. during precarious position, inside battery can produce gas and then make the air pressure of enclosure raise, or in use occur extremely causing battery temperature to raise when battery and inside battery air pressure is raised, thus produce driving current interrupt device or the Pneumatic pressure power of explosion-proof valve.

As a example by such as first embodiment of Fig. 1 to Figure 12, this current interrupt device has electric-conductor 201 and is connected the flip piece 202 being electrically connected to each other with this electric-conductor 201, and flip piece 202 can disconnect under gas pressure with electric-conductor 201 and electrically connecting, wherein in the different embodiments in this utility model, the mode disconnecting electrical connection can be different, can be wherein that the junction point between electric-conductor and flip piece disconnects, such as pull solder joint therebetween to realize the disconnection of electrical connection, additionally, it can also be itself disconnection of at least one in the two, the disconnection of this body structure is such as realized by processing the indentation of weakness on corresponding component, thus realize the disconnection of electrical connection.I.e., it is achieved this utility model disconnects under gas pressure the purpose that frame for movement cuts off the transmission of electric current.

So, as a example by the first embodiment, when overcharging occurs in such as battery, inside battery can produce gas air pressure then and raise, and now under certain gas pressure, flip piece 202 is electrically connected with electric-conductor 201 disconnection by rotary movement, thus interrupt electrode terminal 101 and extraneous circuit, stop the charging of battery, thus avoid the air pressure of inside battery to continue to raise, it is ensured that the safety of battery.

In the present embodiment, electrode terminal 101 includes the pole 104 electrically connected with battery core, such as, be connected with battery core by interior leading-out piece, and wherein pole 104 passes to be drawn from shell by electric current from cover plate 102.Wherein, in the present embodiment, current interrupt device 200 can be arranged on pole 104.The air pressure of inside battery so directly can be experienced by pole 104, highly sensitive, additionally can avoid current interrupt device 200 being attached with electrode terminal separately, convenient processing.

Wherein, owing to, in the field of such as electrokinetic cell, needing the electric current passed through bigger, it is therefore desirable to ensure that the Welding Structure of electric-conductor 201 and flip piece 202 is stable, it is to avoid big current fusing Welding Structure.So, in the present embodiment, as shown in Figure 5 and Figure 6, flip piece 202 is connected by boss Welding Structure with electric-conductor 201, and this boss Welding Structure includes boss 203, the connecting hole 204 accommodating this boss 203 and the annular solder joint 217 between this boss 203 and connecting hole 204.I.e. one in boss 203 and connecting hole 204 is positioned on flip piece 202, and another kind is positioned on electric-conductor 201.Thereby ensure that annular solder joint 217 can stably will be received in boss 203 firm welding in connecting hole 204, and the circulation area that can increase electric current ensures passing through of big electric current.Specifically, as a kind of embodiment, boss 203 can be formed on electric-conductor 201, connecting hole 204 can be formed on flip piece 202, more specifically, flip piece 202 is formed as the first laminated structure, this first laminated structure is formed with connecting hole 204, electric-conductor 201 is formed as the second laminated structure, and this second laminated structure is formed with boss 203.In other embodiments, the two can be with transposition.Additionally in some modes, it is also possible to use the modes such as laser fuU penetration welding flip piece 202 and electric-conductor 201 to be welded.

Wherein, in the present embodiment, the mode realizing disconnecting electrical connection between flip piece and electric-conductor can be realized by indentation, i.e. process the intensity weak point less than other regions in appropriate section, wherein in order to complete being fully disconnected of electric-conductor and flip piece, indentation is usually around electric-conductor and the junction point of flip piece, the welded loop configuration of the most above-mentioned boss.Thus the disconnection of electrical connection is realized by the disconnection of electric-conductor or flip piece itself, wherein indentation can be formed on flip piece and can also be formed on electric-conductor, in the present embodiment, indentation 205 it is formed with on electric-conductor 201, this indentation 205, around the junction point for connecting flip piece 202, i.e. arranges the annular indentation around boss 203 at electric-conductor 201.So, when the air pressure inside of battery rises, the air pressure being subject to, indentation 205 can be promoted to be pulled off so that be scored 205 around electric-conductor 201 part can depart from electric-conductor 201 with flip piece 202, thus realize the disconnection of electric current.In other embodiments, indentation can also be formed on flip piece 202.

As it is shown in fig. 7, for the ease of breaking indentation 205, it is preferable that indentation 205 can be oval.So when by gas pressure, owing to the curvature of profile is different, the region that curvature is bigger is more easy to concentrated stress and stress is relatively big, so can first be torn, thus increases the sensitivity that indentation 205 is pulled off.Further, in the present embodiment, boss 203 is circular, and staggers along the long axis direction of this ellipse in the center of circle of the center of circle of the indentation 205 of ellipse and boss 203.So so that the region unbalance stress at oval major axis two ends, consequently facilitating break indentation 205 from partial points, and then promote the sensitivity of indentation 205.

Being coaxially disposed furthermore it is also possible to arrange electric-conductor flip piece 202 with electrode terminal 101, electric-conductor 201 is obliquely installed relative to the axis of electrode terminal 101.As such, it is possible to make the indentation of lower position to be first pulled off, thus increase the sensitivity that indentation 205 is pulled off.Further, when indentation 205 is oval, the axis of the major axis and electric-conductor that can design ellipse is obliquely installed, when electric-conductor is arranged on pole 104 also with the axis inclination of pole.Consequently facilitating first the bigger region of the curvature of major axis end is torn, thus ensure that indentation 205 can normally be broken when needed, it is ensured that the normal work of current interrupt device 200.

It addition, in order to be further ensured that indentation 205 is pulled off, it is also possible in as shown in Figure 7, design offers on indentation 205 and weakens hole 206.So that indentation 205 is prone to weaken from this be pulled off at hole 206, the size weakening hole 206 therein and number can set according to practical situation.Preferably, weaken hole 206 to be multiple and arrange along indentation 205 interval.In addition to abated effect, when indentation is designed on electric-conductor 201, this weakens hole 206 and is also used as inducing QI and is used so that thus the gas of inside battery can weaken hole 206 by gas pressure on flip piece 202 by this.

Wherein, when current interrupt device 200 is arranged on pole 104, electric-conductor 201 is connected on the outer end end face of pole 104, and the outer peripheral edge of flip piece 202 is fixed relative to cover plate 102.So, under gas pressure, using the outer peripheral edge of flip piece 202 as the strong point, the indentation 205 being formed on electric-conductor 201 can be pulled off.It addition, so that the outer peripheral edge of flip piece can be sealed by gas pressure, be tightly connected on the cover board for example with welding manner by flip piece 202, so that flip piece force can be broken indentation 205 by air pressure inside.The most herein and similar describe in outer end, the inner be to define along the axial direction of pole relative to shell, and relative to " inside and outside " of ring-shaped article, be then radially to define relative to the center of this ring-shaped article such as outer peripheral edge.

In order to ensure electric-conductor 201 and pole 104 fixing in the case of, indentation 205 thereon can also be pulled off, it is preferable that is formed with receiving hole 218 on the outer end end face of this pole 104, and the outer peripheral edge of electric-conductor 201 is fixed on the inwall of this receiving hole.So, electric-conductor 201 stably can be fixed by annular profile, and the region within indentation 205 is not connected with pole 104 it is thus possible to be pulled off under the pulling force or gas direct pressure effect of external force, such as flip piece 202.

In this utility model, current interrupt device 200 has multiple with the mode of inside battery gas communication, in the present embodiment, pole 104 is formed with connection enclosure and the inducing QI duct of current interrupt device 200.Thus, directly apply air pressure by the internal structure of pole 104 to current interrupt device.Make structure simpler.

Wherein, above-mentioned inducing QI duct includes two kinds of gas ports 103 in the present embodiment, and wherein the first gas port 103 is for connecting above-mentioned receiving hole 218 and enclosure, i.e. directly presses to electric-conductor 201 and thrusts indentation 205.That is, inducing QI duct includes the gas port 103 for connecting above-mentioned receiving hole 218 and enclosure.The second gas port 103 is used for connecting flip piece 202 and enclosure, thus breaks indentation 205 to flip piece pressure.Wherein so that flip piece 202 stress improved efficiency, this gas port 103 can be multiple around receiving hole.Therefore, under the common effect of two kinds of gas ports 103, the sensitivity of current interrupt device can be increased.

The most specifically, as shown in Figure 2 and Figure 8, pole 104 is fixing with cover plate 102 is connected, so that electrode terminal structure consolidates.Wherein, the outer end periphery of pole 104 has radially boss 105, and this radial direction boss 105 is fixedly connected on cover plate 102, can process the second gas port 103 thereon so that gas flow to flip piece 202.Additionally, in the present embodiment, the first gas port 103 is circumferentially formed in pole 104.That is, the gas port 103 being positioned on radial direction boss 105 is for pressing flip piece 202, and electric-conductor 201 then can directly be pressed by the gas port 103 below receiving hole 218.As shown in Figure 9, radial direction boss 105 and the body of the pole 104 in this utility model embodiment have been respectively formed on gas port 103, wherein the first gas port 103 on body connects with the receiving hole 218 on end face, and number is four and arranges the most at equal intervals.In other embodiments, the number of the first gas port 103 can also be other quantity, and this utility model is without limitation.

As shown in Fig. 2, Fig. 3, Fig. 8 and Figure 10, in order to avoid cover plate is charged, preferably, pole 104 needs while being the fixing connection of cover plate and cover plate insulate, therefore, pole 104 is fixedly connected on the ceramic ring 207 being sealedly attached to cover plate 102, such as, be attached by Ceramic brazing.So, comparing the insulation that plastics, rubber etc. realize, reliability and weatherability are higher, and the robust seal being possible not only to realize current interrupt device connects, additionally it is possible to realize the insulation of the two.Specifically, the outer end periphery of pole 104 has radially boss 105, the inner edge of ceramic ring 207 has the radial direction support 208 supporting this radial direction boss 105 of connection, wherein radially boss 105 can embed in ceramic ring 207 and be connected with radially supporting 208, the thinner thickness i.e., radially supporting 208 accommodates space to form the stepped ramp type embedded for pole 104.

As shown in figure 11, in another embodiment of present embodiment, it is different from above by the ventilating mode offering gas port 103 on pole, radially boss 105 and radial direction support 208 and are respectively the multiple of circumferentially spaced setting, i.e. radially boss 105 is multiple and circumferentially spaced setting, radially supporting 208 is also multiple and circumferentially spaced setting, and multiple radial direction boss and multiple radial direction support one_to_one corresponding.So, ventilation can be realized by between adjacent radial boss 105 and radially supporting the interval between 208, structure is simpler ingenious, easy to process, without additionally offering inducing QI duct on pole 104, thus do not interfere with pole 104 and assemble the region of electric-conductor 201, the size of electric-conductor 201 can be maximized, thus increase indentation size and ensure the sensitivity broken.In this embodiment, radially boss 104 is three be equally spaced, to take into account connective stability and breathability.In other embodiments, radially the number of boss can also be other quantity, such as four or more.

Wherein in both embodiments, the outer face of ceramic ring 207 is all formed as the hierarchic structure with inner ring and outer ring, and pole 104 embeds and is connected on inner ring.The difference is that, in the embodiment of monoblock type radially boss 105, inner ring is formed as overall ring-type radial direction and supports, and in the embodiment of split type radial direction boss, inner ring then forms above-mentioned multiple spaced radial direction and supports 208, so that overall structure is compacter, connects more firm.

In the present embodiment, in order to set up current flow path with the external world, preferably, conducting ring 216 it is sealedly connected with on the outer face of ceramic ring 207, specifically it is connected on outer ring, the outer peripheral edge of flip piece 202 is fixedly connected on this conducting ring 216, i.e. flip piece 202 is connected on ceramic ring 207 by conducting ring, and flip piece can be set up current loop with the external world by conducting ring.Wherein in order to avoid after breaking indentation conducting ring still electrically connect with pole, and lose the effect of current interruptions.Preferably, conducting ring 216 is sealedly connected on the outer ring of ceramic ring to insulate with pole, i.e. pole 104 and conducting ring 216 is insulated by ceramic ring.It addition, conducting ring 216 is sealedly connected on ceramic ring so that the outer peripheral edge of flip piece is sealed, so that enclosure air pressure can act on flip piece without leaking gas.

Wherein, in order to realize being stably connected with of conducting ring and flip piece, the outer face of conducting ring 216 is formed with L-type seam, and its inner face is for connecting the outer ring of ceramic ring.The outer peripheral edge of flip piece 202 embeds and is supported in this L-type seam, and the block 210 that this outer peripheral edge sets this flip piece 202 by cover is sealedly connected on this L-type seam.Thus while the stable sealing assembling realizing flip piece 202, current interrupt device 200 can be played a protective role.It addition, conducting ring 216 can set up current loop by the electrode leading-out sheet that is connected with block or be joined directly together with the external world, such as and between adjacent cell 100, or all can be connected by electrode leading-out sheet between adjacent cell module.

It is tightly connected ceramic ring 207 and cover plate 102 for convenience, it is preferable that being sealedly connected with transition rings 209 on the inner face of ceramic ring 207, this transition rings 209 can be connected by Ceramic brazing with ceramic ring 207, and this transition rings 209 is sealedly connected on cover plate 102.Wherein transition rings 209 is it is also possible that ceramic ring 207 and cover plate 102 interval are arranged.Owing to ceramic ring 207 does not directly assemble with cover plate 102, avoid cover plate 102 and be high temperature when ceramic ring carries out soldering, additionally the area of ceramic ring 207 will not be caused restriction owing to needs and cover plate 102 directly assemble, and it is not required to ceramic ring 207 is carried out special design, manufactures and easy to assembly.

Wherein, as shown in Figure 8, it is preferable that transition rings 209 has inner ring and the outer ring forming Z-type structure, and cover plate 102 is formed for the through hole that pole 104 passes, and the end face of this through hole is ledge structure, and the inner ring of transition rings embeds and is supported in ledge structure.The most in fig. 8, being positioned in lower section and embedding through hole of inner ring, thus the contact area increasing the two ensures stable connection.

Therefore, in the present embodiment, in order to realize the work of current interrupt device, the outer peripheral edge of flip piece 202 needs being sealed, specifically it is sealedly connected with ceramic ring 207 between outer peripheral edge and the cover plate of flip piece, thus realizes the stable of current interrupt device and work reliably by the sealing of ceramic structure.In this ceramic seal structure, in particular by each self sealss between cover plate and transition rings, transition rings and ceramic ring, ceramic ring and conducting ring and conducting ring and flip piece, make enclosure air pressure can useful effect in current interrupt device so that current interrupt device reliable operation.When assembling, in order to ensure the sealing of current interrupt device, ceramic ring 207 respectively and is tightly connected by Ceramic brazing between conducting ring 216, pole 104 and transition rings 209.First i.e. this can be constituted an independent assembly, be then assembled on cover plate 102 by transition rings 209 being led to Laser Welding, easy to assembly without directly pottery being welded on the cover plate of soldering.It addition, electric-conductor 201 can use Laser Welding to be connected with pole 104, flip piece can use the welding manner such as laser fuU penetration welding or above-mentioned boss Welding Structure to be connected with electric-conductor, and block 210 can be connected by Laser Welding with conducting ring.Additionally, pole 104 can be laser welded with the lead-out tablet of battery core, thus complete overall current and interrupt assembling and the work of device.

The structure of the above-mentioned current interrupt device mainly described in the first embodiment, the arrangement of the current interrupt device being explained below in the first embodiment.

In order to ensure that the normal of the driving current interrupt device of above-mentioned air pressure works timely, can relatively big by the size design of current interrupt device, so and in the case of air pressure is immutable, increase pull-off force by increase lifting surface area.The area such as designing flip piece promotes more greatly the pull-off force of flip piece.In the present embodiment, as it is shown in figure 1, design current interrupts device 200 extends radially out cover plate 102, thus size is increased.Now in battery modules, cell 100 is multiple, between neighboring unit cell 100, current interrupt device 100 in order to avoid extending hinders the electrode terminal on neighboring unit cell 100, preferably, current interrupt device 200 mutually staggers with adjacent electrode terminal on the bearing of trend of short transverse and/or cover plate.So can make full use of cover plate 102 and be not provided with the region of electrode terminal 101 so that the current interrupt device of protrusion will not interfere with the structure on adjacent cover plate, fully save the space in battery bag, improve the energy density in inclusion.Wherein it should be noted that, this utility model herein and following between neighboring unit cell, current interrupt device and adjacent electrode terminal, or electrode terminal each means the connection of adjacent feature rather than the connection of adjacent feature on same cell between different monomers battery with the implication of adjacent electrode terminal.

In the present embodiment, current interrupt device 200 mutually staggers on cover plate bearing of trend with adjacent electrode terminal 101.In other embodiments, the two can also the most mutually stagger.

As a kind of embodiment, as shown in Figure 1, between adjacent cell 100, it is connected by L-type connector 214 between current interrupt device 200 and adjacent electrode terminals, this L-type connector 214 has covering part 211 and lead division 212, covering part 211 covers and is connected in current interrupt device 200, and lead division 212 extends to adjacent electrode terminal with adjacent thereto.Wherein, first the inflection structure of L-type as described in Figure 1 can extend to align on the bearing of trend of cover plate with adjacent electrode terminal then re-extend into this electrode terminal, in other embodiments, first L-type connector can also extend on adjacent cover plate, then extend to electrode terminal, thus realize the electrical connection of the two.

As another kind of embodiment, as shown in Figure 2, between adjacent cell 100, current interrupt device 200 includes the block 210 covering flip piece 202, this block 210 extends to align with adjacent electrode terminal along cover plate 102, i.e. there is covering part 211 and the lead division 212 of straight line, and be connected with adjacent electrode terminal by linear I type connector 215.This I type connector 215 can be also used for connecting the electrode terminal 101 being not provided with current interrupt device 200 between other cells 100, so, by the block 210 of this shape, only need to use this kind of connector so that basic in integral battery door module.

It is different from the above-mentioned embodiment shown in Fig. 2, as shown in figure 12, it is also possible to by the way of increasing cell 100, carry out adaptive bigger current interrupt device.Specifically, between neighboring unit cell 100, the width of the cell 100 being provided with current interrupt device 200 is more than the width of the cell being not provided with current interrupt device 200, and current interrupt device 200 extends close to the widthwise edges of cover plate 102, thus is capable of the adaptation to current interrupt device 200 equally.

Width additionally, due to corresponding cell is relatively big, so that current interrupt device is non-bulging and cover plate, therefore so that adjacent electrode terminal is mutually aligned.The most equally avoid the current interrupt device 200 extending cover plate 102 that other structures such as the Welding Structure on connected cover plate 102 are impacted.And preferably, so that current interrupt device is connected by linear I type connector 215 with adjacent electrode terminal.

The most in use, although increasing the width of cell 100, but do not increase battery core capacity, i.e., the battery core capacity being provided with in the cell 100 of current interrupt device 200 is identical with the battery core capacity in the cell 100 being not provided with current interrupt device, thus avoid existing the cell of different capabilities under same module, and avoid the impact on BMS.Wherein, owing to battery core capacity is identical, the size exceeded of enclosure can use dividing plate to be filled with, i.e. is filled with dividing plate around battery core.So that the assembling Stability Analysis of Structures of battery core.The ratio of the volume wherein considering the size of battery modules and the size of monomer, battery core and dividing plate can be 1:1-2:1, and wherein, dividing plate can be made up of the material of electrolyte resistance.

It addition, consider from current interruptions effect and cost and assembling, in multiple cells 100 of same module, the quantity of cell of current interrupt device 200 is set less than three；Preferably, the quantity of the cell arranging current interrupt device 200 is 3；Preferably, the cell arranging current interrupt device 200 is the cell of end and the central part being positioned at battery modules；Wherein, if battery modules includes n the cell being arranged in order, then the cell of the end of pond module is the 1st cell and n-th cell of battery modules of battery modules；When n is odd number, the cell of the central part of described battery modules is the (n+1)th/2 cell of battery modules；When n is even number, the cell of the central part of described battery modules is the n-th/2 cell or the n-th+2/2 cell, wherein n >=3 of battery modules.

The current interrupt device of this utility model the first embodiment offer, cell, battery modules are be provided, under conceiving without departing from this utility model, feature in first embodiment is such as, boss Welding Structure, oval indentation, ceramic ring etc. all can be applied with other following embodiments, introduce, below in conjunction with Figure 13 to Figure 17, the electrokinetic cell that this utility model the second embodiment provides.

As shown in Figure 13 and Figure 14, second embodiment of the present utility model provides a kind of cell 1100, this cell 1100 includes shell, accommodates electrode terminal 1101 and the cover plate 1102 of package casing that battery core in the enclosure electrically connects with this battery core, and described electrode terminal 1101 is arranged on cover plate 1102 input and output for electric current.Wherein this monomer simple 1100 also includes the current interrupt device 1200 that the internal gas with shell connects, unlike the mode being arranged on electrode terminal in the first embodiment, current interrupt device 1200 arranges on the cover board and connects with the internal gas of shell, wherein this current interrupt device 1200 has electric-conductor 1201 and is connected the flip piece 1202 being electrically connected to each other with this electric-conductor 1201, and flip piece 1202 can disconnect under gas pressure with electric-conductor 1201 and electrically connecting.That is, the operation principle of this current interrupt device 1200 is essentially identical with the current interrupt device in the first embodiment, is all to realize the upset of flip piece and disconnecting circuit by the air pressure experiencing in cell.

Wherein, owing to being not arranged on electrode terminal, electric-conductor 1201 has the body 1299 being connected with flip piece 1202 and extends to electrode terminal 1101 connecting portion 1298 being connected with this electrode terminal 1101 from this body 1299, therefore by the second embodiment, current interrupt device 1200 is arranged on the cover board, so can avoid increasing the height of electrode terminal 1101, thus by utilizing the length space of cover plate to increase battery capacity density.

As shown in Figure 15 to Figure 17, in the present embodiment, the body 1299 of electric-conductor 1201 connects and is formed with indentation 1205 with the internal gas of shell, and this indentation 1205 is around the junction point setting for connecting flip piece 1202.It is thus possible to break this indentation under air pressure inside effect, thus disconnect the electrical connection between flip piece and electric-conductor.Further, indentation 1205 is provided with passage 1206.So, not only by passage 1206, air pressure can be applied on flip piece 1202, and by flip piece pulling force actual to indentation, and can facilitate and break housing 1205 in the position of this passage 1206, playing the effect of the sensitivity promoting flip piece 1202, now indentation can also be arranged on flip piece.Wherein passage 1206 can be multiple and arrange along indentation 1205 interval.Further for the feature such as indentation and passage, the feature in the first embodiment all may apply in present embodiment.In other embodiments, the body of electric-conductor and flip piece can be respectively arranged with indentation.So, when the air pressure of enclosure constantly rises, in addition to the indentation broken on electric-conductor carrys out interruptive current, it is also possible to continue the indentation breaking on flip piece, now the gas of inside battery can fill at flip piece and outwards release, and avoids the air pressure in the shell of cell to continue to increase and ensure.Furthermore it is also possible to allow the gas sensor induction alarm in battery inclusion or cut off circuit.This part will be discussed in detail in follow-up.

Specifically, the indentation 1205 on body can be broken under the first gas pressure in the enclosure, breaks under the effect of the second air pressure the most in the enclosure of the indentation on flip piece, and the second air pressure is more than the first air pressure.The intensity of the i.e. first indentation is less than the second indentation, can be broken by the first less air pressure.Only just continue to break the second indentation when air pressure continues and raises and pressure release.

In the present embodiment, in order to ensure that flip piece 1202 is able to receive that the air pressure force of inside, the outer peripheral edge of flip piece 1202 is tightly connected with electric-conductor 1201, to prevent gas from the pressure release of flip piece outer peripheral edge.Specifically, offer on cover plate 1102 and the passage of enclosure gas communication, and it is sealedly connected with the first ceramic ring 1207 around passage on cover plate, body 1299 is sealedly connected on this first ceramic ring 1207, does not leaks on body 1299 so that air pressure inside can act on.In addition to stably assemble flip piece 1202, the outer peripheral edge of flip piece 1202 is sealedly connected on the second ceramic ring 1296, and this second ceramic ring is sealedly connected on electric-conductor 1201.Therefore by the insulation characterisitic of the second ceramic ring, the outer peripheral edge that can either stably support this flip piece 1202 can also make the outer peripheral edge of electric-conductor and flip piece 1202 be insulated by the second ceramic ring 1296, so can remain open electric current after flip piece 1202 and electric-conductor 1201 are broken by indentation 1205 to connect, thus play the effect of current interruptions.

Specifically, as a kind of embodiment, as shown in figure 17, the annular boss 1297 around indentation 1205 it is formed with, so, by the structure of this annular boss 1297 on the body 1299 of electric-conductor 1201, its inner side radially may be used for forming the features such as indentation 1205, and so that the back side recess of this annular boss 1297 seals and accommodates the first ceramic ring 1207, it addition, the outside of annular boss 1297 may be used for sealing support the second ceramic ring 1296.So, by the unique texture of the electric-conductor described in Figure 16 in this utility model the second embodiment, it is possible to make the more convenient installation of current interrupt device 1200.

It addition, the first ceramic ring 1207 is sealedly connected on cover plate 1102 by transition rings 1209, as shown in figure 17, this transition rings 1209 has the connection main body of embedding passage inwall and for connecting the flange ring of the first ceramic ring 1207.This flange ring is radially projecting from connection main body and fits with cover plate.Thus ensure the stable installation of current interrupt device 200, directly it is connected with cover plate 1102 without the first ceramic ring 1207.

In the present embodiment, connect for convenience, preferably, electrode terminal 1101 includes through cover plate 1102 pole 1104 that electrically connects with battery core, the connecting portion 1298 of electric-conductor 1201 is formed with slot 1295, in pole 1104 penetrates this slot 1295 and be welded to each other, thus realize being stably connected with of the two.It addition, current interrupt device 1200 includes covering the connector 1210 electrically connected on flip piece 1202 and with this flip piece 1202, this connector 1210 has the covering part 1294 covering flip piece 1202 and the lead division 1293 extended from this covering part 1294.Wherein this connector 1210 can be formed as the structure identical with the L-type connector 214 in the first embodiment, i.e. covering part and lead division and be formed as L-type inflection structure.Consequently facilitating electric current is drawn out to outside adjacent electrode terminals or module from current interrupt device 1200.

Wherein in the battery modules that at least one cell is above-mentioned cell 1100, current interrupt device extends radially out described cover plate, thus increases lifting surface area and increase pull-off force.Between neighboring unit cell, current interrupt device mutually staggers on cover plate 1102 bearing of trend with adjacent electrode terminal, thus avoids interference the structure on adjacent cover plate.Additionally identical with the first embodiment, it is provided with the quantity of cell 1100 of current interrupt device 1200 less than three.

Above describe the electrokinetic cell that this utility model the second embodiment provides, wherein essentially describe the feature different from the first embodiment, in the case of reconcilable, the feature of two embodiments can mutually replace, combine, and this is not done too much repeating by this this utility model.

The cell 2100 that this utility model the 3rd embodiment provides is introduced below in conjunction with Figure 18, this includes shell, it is contained in the battery core in this shell, the electrode terminal 2101 electrically connected with this battery core and the cover plate 2102 of package casing, electrode terminal 2101 is arranged on cover plate 2102, wherein cell includes the first electrode leading-out piece 2298 electrically connected with battery core, and the second electrode leading-out piece 2297 electrically connected with electrode terminal 2101, the explosion-proof valve 2200 that the internal gas with shell connects it is additionally provided with on cover plate 2102, this explosion-proof valve 2200 has connection the first electrode leading-out piece 2298 and flip piece 2202 of the second electrode leading-out piece 2297, i.e., two electrode leading-out pieces are connected by this flip piece 2202.

Wherein, it is formed with the first indentation 2205 on first electrode leading-out piece 2298 and/or the second electrode leading-out piece 2297, this first indentation 2205 can disconnect interrupting the electric current on the first electrode leading-out piece 2298 and/or the second electrode leading-out piece 2297 under gas pressure in the enclosure, i.e. the effect of this first indentation be so that arrange its electrode leading-out piece disconnect thus the transmission of interruptive current, therefore at least one in two electrode leading-out pieces is provided with the disconnection that the first indentation can realize the electrical connection of battery core and electrode terminal, then cell is made to disconnect with the transmission of extraneous electric current.Additionally, the second indentation 2299 it is additionally provided with on flip piece 2202, this second indentation 2299 can disconnect so that the gas in shell outwards releases via flip piece 2202 under gas pressure in the enclosure, the effect of the i.e. second indentation is ventilation, upon opening so that internal gas leaks, thus avoid inside battery air pressure to continue rising and cause blast, to play explosion-proof.

Specifically, the first indentation can be broken under the first gas pressure in the enclosure, and the second indentation can be broken under the effect of the second air pressure in the enclosure, and the second air pressure is more than the first air pressure.The intensity of the i.e. first indentation 2205 is less than the indentation of the second indentation 2205, can be broken by the first less air pressure.Only just continue to break the second indentation 2205 when air pressure continues and raises and pressure release.

As shown in figure 18, in the present embodiment, two electrode leading-out pieces can be lengthy motion picture structure, so in order to turn-off current, first indentation 225 extends to opposite side edge from a lateral edges, so so that long chip architecture can be more in time along the first indentation fracture along the width of this long chip architecture.Wherein flip piece 2202 could be formed with ring-type outer wall, and two electrode leading-out pieces can be fixedly connected on ring-type lateral wall, to realize electric current transmission.Specifically, in this utility model, the ring-type outer wall of this flip piece can be formed by the boss in such as boss Welding Structure, and flip piece is also formed with conical ring structure in addition, this conical ring is from the outward-dipping outer peripheral edge extending to flip piece of boss, to be formed in bowl-shape flip piece.It addition, the second indentation can be formed as circulus around the circumference of flip piece, thoroughly to disconnect under gas pressure, increase air venting efficiency.Specifically the second indentation may be formed in conical ring structure.So that flip piece effectively can be broken the first indentation and the second indentation by gas pressure, the outer peripheral edge of flip piece 2202 and the relatively-stationary insulated enclosure of described cover plate, so on the one hand can avoid gas just to leak in the case of not breaking the first indentation and the second indentation and make two indentations ineffective.On the other hand, cover plate can be avoided charged by insulation connection.

In the present embodiment, electrode terminal 2101 includes the pole through cover plate, and this pole is connected with the outside insulation of cover plate by the second ceramic ring, in order to set up current loop with the external world.It is to be realized by being connected with each other of electrode terminal between the most adjacent cell.Wherein cover plate can be avoided charged by ceramic ring.It addition, be sealedly connected with the first ceramic ring 2207 between the outer peripheral edge of flip piece 2202 and cover plate, play equally and seal and the effect of insulation.

It addition, for the ease of connecting flip piece 2202, cover plate 2102 is fixedly connected with First Transition sheet 2295, it can be aluminium flake that the periphery of flip piece 2202 is fixedly connected with the second transition plate 2296, First Transition sheet and the second transition plate.First Transition sheet 2295 is connected with the first ceramic ring 2207 soldering coaxially with the second transition plate 2296.So, when assembling, first two transition plates can be welded on ceramic ring by brazing mode, then two stators are being welded with other structures, soldering between the structure such as ceramic ring and cover plate so can be avoided to carry out and the high temperature etc. that produces, thus easy to assembly and realize sealing by the first ceramic ring 2207, the firm and sealing of insulation, and be possible to prevent cover plate 2102 charged.

Specifically First Transition sheet 2295 and the second transition plate 2296 can be respectively circulus to adapt to two annular end face of ceramic ring.Furthermore it is preferred that cover plate 2102 is formed with annular boss, First Transition sheet 2205 is supported on this annular boss, and ceramic ring is close to the inwall of this annular boss and is extended towards the second transition plate 2296, thus by ceramic ring is stably connected in cover plate 2102.

It addition, explosion-proof valve also includes the protecting film 2099 that can be broken through by air pressure, this protecting film seals and covers above flip piece 2202, is in particular connected to away from the First Transition sheet 2295 of flip piece.Protecting film 2099 can play the protective action within explosion-proof valve 2200 the most under normal circumstances, and when needs are explosion-proof, can be broken through by certain air pressure, the such as second air pressure, thus avoids affecting the explosion-proof effect of explosion-proof valve.

It addition, be pulled off to realize the priority of two indentations in this utility model, the ratio of the residual thickness of the first indentation and the residual thickness of the second indentation is 1:3-1:1.2.It is further 1:2-1:1.3.

Above describe the cell that this utility model the 3rd embodiment provides.The 4th embodiment that this utility model provides is introduced below in conjunction with Figure 22.

4th embodiment of the present utility model provides a kind of cell 3100 and uses the battery modules of this cell.nullThis cell 3100 includes shell、It is contained in the battery core in this shell、The cover plate 3102 of package casing、And the electrode terminal 3101 being arranged on cover plate 3102，Wherein，Cell 3100 also includes the interior leading-out piece 3299 electrically connected with battery core and is connected to the current interrupt device 3200 between interior leading-out piece 3299 and electrode terminal 3101，Wherein，It is different from the first embodiment the mode of outer end on pole that is arranged on，Current interrupt device 3200 in present embodiment is positioned at inside cover plate 3102 and connects with the internal gas of shell to disconnect the electric current flowed through under gas pressure，Wherein，Connect on electrode terminal 3101 and have the adaptor 3298 extended radially outward from outer peripheral edge，To be connected the outer peripheral edge of current interrupt device by this adaptor 3298.

So, the adaptor 3298 extended radially outwards due to the outer peripheral edge having from electrode terminal, make the current interrupt device being connected with adaptor 3298 radial outside, compare the mode being directly connected with electrode terminal, it is bigger that its area can design, thus increase air pressure inside and electrode interrupts the force area of device, thus can promote electrode in the case of air pressure is constant and interrupt the stress of device, and motor current interrupts the sensitivity of device 3200, complete the cut-out of electric current in time.The most especially in battery applications of the present utility model in the big field of batteries such as electrokinetic cell, owing to generally requiring the big electric current of transmission, the size therefore increasing adaptor and high current interruption device has the transmission utilizing big electric current.

In the present embodiment, adaptor 3298 is formed as circulus, the inner peripheral of this circulus is connected with the outer peripheral edge of electrode terminal, outer peripheral edge is connected with the outer peripheral edge of current interrupt device, thus play the effect increasing current interrupt device area, in other embodiments, adaptor 3298 can also be capable of increasing the effect of the area of current interrupt device equally for radially extending and the structure of multiple connection posts of circumferentially spaced setting.

In the present embodiment, in order to increase the firmness of adaptor and electrode terminal and current interrupt device, it is ensured that electric current transmission is stable.Preferably, the inner peripheral of described circulus coordinates with the outer peripheral edge seam of described electrode terminal the inner, specifically can be formed with seam on the inner outer peripheral edge of electrode terminal, and the inner peripheral of adaptor embeds in this seam and is connected, thus increase connection area and can increase electric current transmission efficiency while ensureing stable connection.Wherein the interior outer end of electrode terminal defines along its axial direction relative to shell, i.e. close to enclosure for the inner.

Additionally, in the present embodiment, the outer peripheral edge of circulus is projecting inward towards described shell, circulus itself is i.e. made to be formed as the structure of ring cap, and current interrupt device coordinates with the inner side seam of this outer peripheral edge, thus not only ensure stable connection increase electric current transmission efficiency and also can spaced apart current interrupt device and electrode terminal so that provide space for current interrupt device disconnection under gas pressure.

In the present embodiment, interior leading-out piece 3299 includes the connection sheet (not shown) being connected with battery core, and this connection sheet extends towards cover plate direction from battery core.Interior leading-out piece also includes for accommodating the support slot installing current interrupt device, and the connecting plate extended towards rightabout from this support slot, connecting plate is connected with cover plate insulation respectively, thus avoid cover plate charged, specifically, connecting plate can be formed as overall laminated structure, i.e. link slot with link slot and include two sidewalls and a diapire, and two sidewalls are connected with the connecting plate of both sides respectively.It addition, so that current interrupt device and enclosure gas communication, can design and be formed on the diapire of support slot and the air passing hole of enclosure gas communication.

In the present embodiment, in order to avoid cover plate is charged, interior leading-out piece 3299 is connected to the inner side of cover plate 3102 by ceramic member 3296 insulation.Specifically, ceramic member 3296 can be formed as potsherd, and be weldingly connected with interior leading-out piece 3299 and cover plate by transition plate 3294 respectively, i.e. transition plate 3294 is two panels, this transition plate can be aluminium flake, lay respectively at the upper and lower surface of ceramic member 3296, ceramic member 3296 is welded to connect with cover plate 3102 by being positioned at the transition plate 3294 of ceramic member 3296 upper surface, ceramic member 3296 is welded to connect with leading-out piece 3299 also by the transition plate 3294 being positioned at ceramic member 3296 lower surface simultaneously, so that being welded to connect between ceramic member 3296 and cover plate 3102 and interior leading-out piece 3299 is more easy to realize, and Welding Structure is stable.Wherein ceramic member 3296 can be connected by Ceramic brazing with between the transition plate 3294 of its upper and lower surface, can be connected by laser welding between the transition plate 3294 and cover plate 3102 of ceramic member 3296 upper surface, the transition plate 3294 at ceramic member 3296 lower surface can be connected by laser welding between interior leading-out piece 3299.

In the present embodiment, current interrupt device 3200 has electric-conductor 3201 and is connected the flip piece 3202 being electrically connected to each other with this electric-conductor 3201, and flip piece 3202 can disconnect under gas pressure with electric-conductor 3201 and electrically connecting, wherein electric-conductor 3201 is connected on interior leading-out piece 3299 and is formed with the gas port 3203 with enclosure gas communication, specifically, electric-conductor 3201 embeds in the support slot being connected to interior leading-out piece, the air passing hole so formed in support slot can be with gas port 3203 gas communication, so that flip piece 3202 can experience the internal gas pressure of shell, thus disconnect flip piece 3202 and the electrical connection of electric-conductor 3201 under air pressure inside effect.Wherein, the outer peripheral edge of flip piece 3202 is connected to set up electric current access path with the outer peripheral edge of adaptor 3298.

Wherein, in the present embodiment, as a kind of mode disconnecting electrical connection, electric-conductor 3201 being formed with indentation, this indentation is around the junction point setting for connecting flip piece 3202.So, under the effect of air pressure inside, this indentation can be pulled off thus disconnect the electrical connection with flip piece.In other embodiments, indentation can also be formed on flip piece or use the mode breaking the two junction point.In order to realize the air pressure pressure to flip piece 3202, the outer peripheral edge of flip piece 3202 is supported by insulating part 3295 and is connected on electric-conductor 3201 and/or interior leading-out piece 3299, thus realize the assembling to flip piece 3202 by insulating part 3295, so ensure that outer peripheral edge and interior leading-out piece 3299 and the electric-conductor insulation of flip piece, thus also can electrically connect with electric-conductor or interior leading-out piece in outer peripheral edge after avoiding not electrically connecting with electric-conductor disconnection under flip piece is at gas pressure.

Specifically, insulating part can be the ring-type insulating part such as ceramic ring, sealing ring, wherein insulating part has three kinds of connected modes, first is supported on electric-conductor 3201 for sealing, in particular it is supported on electric-conductor 3201 around the region being pulled off region, second for being supported on interior leading-out piece 3299, in particular it is supported on interior leading-out piece 3299 around on the region of electric-conductor 3201,3rd for be supported on interior leading-out piece 3299 and electric-conductor 3201 simultaneously, the most as shown in figure 23, insulating part is supported on the join domain of interior leading-out piece 3299 and electric-conductor 3201.

Wherein, stable in order to ensure that the electric current of electric-conductor and flip piece transmits, it is especially adapted for use in the electrokinetic cell of big electric current, similar with the first embodiment, in the case of electric-conductor arranges indentation 3205, as shown in figure 23, flip piece 3202 and electric-conductor 3201 by by indentation 3205 around boss Welding Structure be connected, this boss Welding Structure includes boss 3203, the connecting hole 3204 accommodating this boss 3203 and the annular solder joint 3217 between this boss 3203 and connecting hole 3204, thus ensures effectively passing through of big electric current.The most specifically, as shown in figure 23, different from shown in Fig. 6 in the first embodiment, boss 3203 is formed on flip piece 3202, and connecting hole 3204 is formed on electric-conductor 3201.In addition it is also possible to identical with the first embodiment, boss is formed on electric-conductor 3201, and connecting hole 3204 is formed on flip piece.

Additionally, as shown in figure 22, as a kind of embodiment, electric-conductor 3201 can be formed as cap-like structure, this cap-like structure includes the cap body that is connected with flip piece and the brim of a hat around this cap body, is wherein formed with above-mentioned gas port on the brim of a hat and is connected with interior leading-out piece, and cap body is protruded towards flip piece, flip piece is formed as being connected between laminated structure, and the outer peripheral edge of this laminated structure and the brim of a hat above-mentioned insulating part 3295.So that the compact conformation of the current interrupt device of this utility model offer, assembling is stable.

In the present embodiment, in order to set up current loop with the external world, preferably, electrode terminal 3101 includes the pole 3104 through cover plate, this pole is connected with cover plate insulation by ceramic ring 3293, thus avoid cover plate charged, additionally adaptor 3298 is connected on the inner of this pole set up current loop with the part by exposing outside cover plate with the external world.Specifically, ceramic ring 3293 is sealedly connected on the outer surface of cover plate, and is connected with pole 3104 sealing, to ensure the sealing effectiveness within cover plate.Wherein, axially through being formed with pore 3292 on pole.So, current interrupt device 3200 pressurized interrupt electrical connection during will not by cover plate in closed chamber air pressure affected but pressure reduction can be set up with ambient atmosphere so that flip piece 3202 under the effect of inside and outside differential pressure action and break indentation 3205.

Above describe the cell that this utility model the 4th embodiment provides.The 5th embodiment that this utility model provides is introduced below in conjunction with Figure 24.

null5th embodiment of the present utility model provides a kind of cell 4100 and uses the battery modules of this cell，Wherein this cell 4100 includes shell、Accommodate battery core in the enclosure、The electrode terminal 4101 electrically connected with this battery core and the cover plate 4102 of package casing，Electrode terminal 4101 is arranged on cover plate 4102，Wherein，Electrode terminal includes passing through, through cover plate 4102 and with battery core, the pole 4104 that interior leading-out piece 4196 electrically connects，Cell also includes the current interrupt device 4200 being arranged on pole 4104，This current interrupt device 4200 has flip piece 4202 that is fixing relative to cover plate 4102 and that connect with the internal gas of shell，And flip piece 4202 is connected by junction point with the outer face of pole 4104，This junction point can disconnect under gas pressure.So, in present embodiment, the operation principle of current interrupt device is directly to be pulled open by the junction point of flip piece 4202 and pole 4104 by air pressure, thus interrupts the electrical connection of the two.

In order to promote sensitivity, it is preferable that flip piece 4202 is connected with pole by single solder joint 4199.The solder joint 4199 such as completed by spot welding, additionally can be realized by other welding means such as Laser Welding.Therefore, present embodiment can reasonably be implemented by the fusion penetration of butt welding point, molten width, thus be realized the control breaking pressure.

In the present embodiment, it is similar to the first embodiment, pole 4104 is formed with the gas port 4103 that the inside with shell connects, such that it is able to air pressure inside be directed in current interrupt device easily.It addition, in order to further motor current interrupts the reliability of device, it is preferable that being formed with indentation 4205 on flip piece 4202, this indentation 4205 is arranged around junction point.So, except above-mentioned break junction point in addition to, it is also possible to realize the interruption of electric current by breaking indentation 4205.In the present embodiment, the air pressure of breaking of junction point and indentation has successively property, and specifically, junction point can be broken under the first gas pressure in the enclosure, and indentation 4205 can be broken under the effect of the second air pressure, and the second air pressure is more than the first air pressure.So that indentation 4205 can be as the back-up measures of junction point, it is ensured that the safety of battery.It is highly preferred that be coated with block 4210 on flip piece 4202, this block 4210 is formed with pore 4197.So, after indentation 4205 is pulled off, the gas of enclosure can be realized the pressure release of inside battery by being discharged from pore 4197 by flip piece again, prevent inside battery from exploding then, and this principle is similar with the explosion-proof valve of the 3rd embodiment.

In the present embodiment, it is connected between pole 4104 with cover plate 4102 and has the first ceramic ring 4207, thus realize the stable installation of pole by ceramic structure and avoid cover plate 4102 charged simultaneously.Additionally, seal between pole 4104 and the outer peripheral edge of flip piece and be connected to the second ceramic ring 4198 repeatedly, such that it is able to realized the sealing of the outer peripheral edge of flip piece by this ceramic structure, in ensureing, flip piece can effectively be pressed by gas, and ensure to insulate between pole and the outer peripheral edge of flip piece, it is to avoid the flip piece after breaking junction point or indentation remains able to conduction simultaneously.

Specifically as a kind of embodiment, pole 4104 has and is formed with the annular boss 4297 around junction point, thus by the construction features of this annular boss, the back side recess of this annular boss 4297 seals and accommodates the first ceramic ring 4207, this first ceramic ring 4207 is sealedly connected on cover plate 4102, the radial outside of annular boss 4297 seals support the second ceramic ring 4198, and this second ceramic ring 4198 seals the outer peripheral edge supporting flip piece 4202.The structure making overall current interruption device is compacter, and assembles stable.For the ease of assembling, the first ceramic ring 4207 is sealedly connected on cover plate 4102 by transition rings 4209.Specifically can carry out Ceramic brazing by transition rings with the first ceramic ring 4207 and be tightly connected.

Above describe this utility model first to the 5th embodiment, below, introduce, in conjunction with Figure 20 and Figure 21, cell and the embodiment of battery modules that a kind of this utility model provides, wherein do not do too much repeating with the effect of said structure embodiment same characteristic features at this.

nullIn the present embodiment，A kind of cell is provided，This cell 100 includes shell 109、The battery core 108 being contained in shell 109、The electrode terminal 101 electrically connected with this battery core 108 and the cover plate 102 of package casing，Electrode terminal 101 is arranged on cover plate 102，Electrode terminal includes through cover plate 102 pole 104 that electrically connects with battery core，Cell also includes the current interrupt device 200 being arranged on pole 104，This current interrupt device 200 connects with the internal gas of shell，Wherein current interrupt device 200 has electric-conductor 201 and is connected the flip piece 202 being electrically connected to each other with this electric-conductor 201，And flip piece 202 can disconnect under gas pressure with electric-conductor 201 and electrically connecting，Wherein electric-conductor 201 is connected on pole 104 to be electrically connected to each other，Flip piece 202 is connected by boss Welding Structure with electric-conductor 201，This boss Welding Structure includes boss 203、Accommodate the connecting hole 204 of this boss 203 and the annular solder joint 217 between this boss 203 and connecting hole 204，Flip piece 202 is formed as the first laminated structure，It is formed with connecting hole 204 in this first laminated structure，Electric-conductor 201 is formed as the second laminated structure，It is formed with boss 203 in this second laminated structure，Indentation 205 it is formed with on electric-conductor 203，This indentation 205 is arranged around boss 203，And electric-conductor 201 is connected on the outer end end face of pole 104，The outer peripheral edge of flip piece 202 is fixed relative to cover plate 102，Pole 104 is fixing with cover plate 102 to be connected，And it is formed with connection enclosure and the inducing QI duct of current interrupt device 200 on pole 104，Pole 104 is arranged on the ceramic ring 207 being sealedly attached on cover plate 102，Conducting ring 216 it is sealedly connected with on the outer face of ceramic ring 207，The outer peripheral edge of flip piece 202 is sealedly connected on this conducting ring 216，Pole 104 is insulated by ceramic ring 207 with conducting ring 216.Thus stably accomplish transmission and the interruption of electric current.

In the present embodiment, the outer end end face of pole 104 being formed with receiving hole 218, the outer peripheral edge of electric-conductor 201 is fixed on the inwall of this receiving hole.

In the present embodiment, indentation 205 is oval, and boss 203 be circle, and staggers along the long axis direction of this ellipse in the center of circle of the center of circle of indentation 205 and boss 203, and the axis of the major axis of ellipse and electrode terminal is obliquely installed.

In the present embodiment, and the outer end periphery of pole 104 has radially boss 105, the inner edge of ceramic ring 207 has the radial direction support 208 supporting this radial direction boss 105 of connection, radially boss 105 is the multiple of circumferentially spaced setting, radially supporting 208 is the multiple of circumferentially spaced setting, and the plurality of radial direction boss and multiple radial direction support one_to_one corresponding.

In the present embodiment, the outer face of ceramic ring 207 is formed as the hierarchic structure with inner ring and outer ring, pole 104 embeds and is connected on inner ring, it is sealedly connected with on outer ring and the conducting ring 216 of pole insulation, the outer peripheral edge of flip piece 202 is fixedly connected on this conducting ring 216, being sealedly connected with transition rings 209 on the inner face of ceramic ring 207, this transition rings 209 is sealedly connected on cover plate 102 so that ceramic ring 207 and cover plate 102 interval are arranged.

In the present embodiment, ceramic ring 207 respectively and is tightly connected by Ceramic brazing between conducting ring 216, pole 104 and transition rings 209.

In the present embodiment, transition rings 209 has inner ring and the outer ring forming Z-type structure, and cover plate is formed for the through hole that pole 104 passes, and the end face of this through hole is ledge structure, and the inner ring of transition rings embeds and is supported in ledge structure.

In the present embodiment, the outer face of conducting ring 216 is formed with L-type seam, and the outer peripheral edge of flip piece 202 embeds and is supported in this L-type seam, and the block 210 that this outer peripheral edge sets this flip piece 202 by cover is sealedly connected on this L-type seam.

Wherein, in order to complete the assembling of this cell, as shown in figs 20 and 21, battery core 108 connecting and has lower spacer ring 107, connecting below cover plate 102 has upper spacer ring 106, and upper and lower spacer ring can use isolation material to make.Wherein, cell 100 also includes interior being connected sheet 110 with battery core is connected, this interior connection sheet 110 extends between spacer ring 107 and lower spacer ring 106, in order to transmit electric current, the lower surface of pole 104 is formed with end difference, and this connects end difference and passes cover plate 102 and upper spacer ring 106 and the interior end clamping being connected sheet 110.Thus complete electric current from battery core 108 to the transmission of pole 104 and make cover plate 102 and shell 109 be insulated, it is to avoid charged.

In the battery modules that the present embodiment provides, this battery modules includes multiple cell, at least one cell is above-mentioned cell, current interrupt device 200 extends radially out cover plate 102, between adjacent cell 100, current interrupt device 200 mutually staggers with adjacent electrode terminal on the bearing of trend of cover plate.Additionally, between adjacent cell 100, connected by L-type connector 214 between current interrupt device 200 and adjacent electrode terminal, this L-type connector 214 has covering part 211 and lead division 212, covering part 211 covers and is connected in current interrupt device 200, and lead division 212 extends to adjacent electrode terminal.

In addition; the present embodiment also provides for a kind of electrokinetic cell; it is characterized in that; this electrokinetic cell includes inclusion and the battery modules being contained in this inclusion; battery modules is above-mentioned battery modules; and being provided with the gas-detecting device for detecting fuel gas in inclusion, this gas-detecting device adjacent currents is interrupted device and is arranged, and provides fuel gas signal for for charge and discharge protecting system.Furthermore, it is contemplated that cost and effect, this battery modules has a current interrupt device.

Above describing the cell with current interrupt device or explosion-proof valve, current interrupt device therein or explosion-proof valve are all the safety measures realized by the frame for movement of itself.This utility model will be described in detail the electrokinetic cell including charge and discharge protecting system below, to promote safety by automatically controlled mode.

As shown in figure 19, this utility model provides a kind of electrokinetic cell, and this electrokinetic cell can be above-mentioned to have current interrupt device, explosion-proof valve or other kinds of electrokinetic cell.Wherein, electrokinetic cell includes inclusion and the multiple cells 100 being contained in this inclusion, the most the plurality of cell 100 is the most in a series arrangement or parallel way forms battery modules, the gas-detecting device 300 of the fuel gas being provided with in wherein said inclusion in detecting electrokinetic cell, such as gas sensor, thus provide signal for whether cutting off the charge-discharge circuit of electrokinetic cell.

Wherein, the charge and discharge protecting system that this electrokinetic cell includes, in addition to including the above-mentioned gas-detecting device 300 being positioned at electrokinetic cell, also includes controlling device 400 and current switching device.

Wherein, fuel gas signal is fed back to control device 400 by gas-detecting device 300, and this control device 400 cuts off the charge-discharge circuit of electrokinetic cell for controlling current channel device according to fuel gas signal.That is, in this utility model safety be by whether there is fuel gas and automatically controlling of carrying out in detection inclusion.Wherein, in precarious positions such as battery overcharge it is, inside can produce fuel gas, this portion gas can be leaked in inclusion more or less by various modes, now gas-detecting device, the most airtight sensor is able to detect that fuel gas, and feeds back to control device, controls device according to whether the amount of the fuel gas detected or the fuel gas detected decides whether to cut off the charge-discharge circuit of electrokinetic cell.When fuel gas being detected, or when the amount of fuel gas exceedes predetermined threshold value, the charge-discharge circuit of electrokinetic cell can be cut off with control circuit lane device, to ensure the safety of electrokinetic cell.

In order to reduce potential safety hazard further.Electrokinetic cell also include by control device 400 control alarm device 500, so related personnel can be pointed out to withdraw scene by alarm devices such as voice, flashing light, sirens, and reduce potential safety hazard.

As shown in figure 19, controlling the host computer main control chip 401 that device 400 includes electrokinetic cell and the control module 402 being connected with this main control chip signal, control module 402 is connected with connecting and disconnecting of the circuit device signal.Wherein current switching device can be the relay 403 being positioned in charge-discharge circuit, and to be controlled to cut off charge-discharge circuit by control module 402, additionally alarm device 500 can directly be connected with PC control chip 401 signal, thus receive alarm command and report to the police.

In concrete work process, collection signal for gas sensor can do the process such as digital-to-analogue conversion, Sampling hold, it can in addition contain carry out the breakdown judge of system, when system does not break down, further collection signal can be carried out the process of gas concentration thus judge whether there occurs the leakage of fuel gas, when the leakage concentration that fuel gas occurs exceedes threshold value, host computer main control chip 401 carry out cutting off electric current and the operation of warning.

Wherein, in this embodiment, gas-detecting device is arranged on outside cell, fuel gas can be released after being pulled off by the indentation in above-mentioned current interrupt device or explosion-proof valve, as long as gas can be released in addition, can also be by well known to a person skilled in the art that various conventional explosion-proof valve releases.That is, in battery modules, at least one cell is provided with the current interrupt device cutting off charge-discharge circuit under cell internal gas pressure effect, the most aforesaid each current interrupt device.And current interrupt device can make the gas in shell to leak in the switched off state.So that the gas-detecting device in inclusion is able to detect that the fuel gas leaked, now represent that battery has occurred in that dangerous situations such as overcharging.Additionally, for the sensitivity promoting system, it is preferable that gas-detecting device adjacent currents is interrupted device and is arranged, thus corresponding signal can be detected in time and feed back to control device after fuel gas discharges.Additionally, in addition to current interrupt device, in some embodiments, it is provided with releasing the explosion-proof valve of gas at least one cell under described cell internal gas pressure effect, such as explosion-proof valve in the 3rd embodiment, now, gas-detecting device can be arranged by neighbouring described explosion-proof valve.

In the present embodiment, in order to realize above-mentioned gas leak, current interrupt device in the respective embodiments described above has covering, this covering is formed with pore 213 so that the gas in described shell can leak after flip piece and electric-conductor disconnect electrical connection.It addition, the pore on covering is it is also possible that current interrupt device and air directly set up pressure reduction, thus realize the action of flip piece.Covering the most herein can be the block 210 in the first embodiment, it is also possible to be the connector 1210 in the second embodiment, or is the protecting film 2099 etc. in the 3rd embodiment.It is thus possible to after corresponding indentation is pulled off so that gas can be released by the pore 213 in the such as first embodiment, thus detects, by gas-detecting device, the fuel gas leaking in bag in time.

Five kinds of embodiments of the present utility model are described in detail above in association with accompanying drawing; but; this utility model is not limited to the detail in above-mentioned embodiment; in technology concept of the present utility model; the technical solution of the utility model can be carried out multiple simple variant, these simple variant belong to protection domain of the present utility model.

It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in the case of reconcilable, can be combined by any suitable means, in order to avoid unnecessary repetition, various possible compound modes are illustrated by this utility model the most separately.

Additionally, can also carry out combination in any between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.

Finally, the Developed Background introducing the design of this utility model above-mentioned utility model is described:

Along with increasingly sharpening of environmental pollution, the exploitation of new-energy automobile has become national new strategical planning, and the mixed dynamic or pure electric automobile in new-energy automobile occupies the main flow in current automobile market, in electric automobile field, course continuation mileage is currently the principal element of restriction development, and this depends on the energy density of battery core, the main core material of existing market is ternary and LiFePO4 Liang Ge camp, the former energy density is high, but poor safety performance, especially overcharge and can cause blast on fire, for security performance, this requires that strict automobile industry is a biggest challenge.

But the increase of battery capacity can bring higher course continuation mileage, this allows for everybody needs the security performance of ternary material to take certain improvement project to ensure its safety, but owing to the performance of material is difficult to the most further be improved, can only go to try every possible means from structure top.

As stated in the Background Art, the design of existing battery bag is substantially, by BMS (battery management system), the battery core in module carries out voltage and current temperature management and control, but during actually used, the concordance of battery core and the reliability of management software still have the most accidental risk.Specifically, reference people are for the use habit of mobile device, for electric automobile, typically also can there is the situation about always charging that plugged in by car body in masses, although there being BMS software to be controlled, single this battery charges for a long time, if software detection lost efficacy or other arise that the risk that in inclusion loop, battery core overcharges extremely.Therefore, utility model people of the present utility model expects can being a kind of mechanical design protection of battery design, with the battery security risk caused after avoiding software failure.

For mechanical protective measure; inventor of the present utility model creatively finds; battery current interruptions opportunity under the precarious position such as overcharging is regular governed in fact; i.e.; the principle that air pressure inside rises when the precarious position such as overcharging and occurring can be utilized; design current interrupt device or the explosion-proof valve of the electric current that can interrupt electrode terminal such that it is able to control input or the output of electrode terminal, to ensure safety.

Additionally, electrokinetic cell capacity owing to using on automobile is generally tens times of 3C battery class, and by dozens or even hundreds of times of electric current baby battery class especially, so also requiring that this sheet have to be by the biggest electric current, and owing to using the reason of environment, its weatherability and sealing requirements are more strict, and these problems just define technical scheme in each embodiment that this utility model is above-mentioned after collecting.And by verification experimental verification, current interrupt device in each embodiment of this utility model or explosion-proof valve all can disconnect the electric current of battery in time, thus effectively promote safety.

Such as, therefore the overcurrent of electrokinetic cell is big, requires big to the overcurrent of welding position and rotating sheet, and therefore this utility model the first embodiment is it is also mentioned that boss Welding Structure, to promote weld strength, so the disconnection difficulty between rotating sheet and electric-conductor will be made big.So in view of after these problems, can find out and increase the area of current interrupt device to make rotating sheet easily overturn.Such as, this utility model mention in the first embodiment by strengthen cell size (Figure 12), or it is designed as current interrupt device extending cover plate (Fig. 2), and the 4th increase adaptor (Figure 22) in embodiment, be for current interrupt device being designed is relatively big to promote lifting surface area, thus promoting sensitivity so that flip piece is more easy to action and plays the purpose of interruptive current, is particularly suited for electrokinetic cell.

Claims

1. a cell, this cell (100) includes shell, accommodate battery core in the enclosure, the electrode terminal (101) electrically connected with this battery core and the cover plate (102) encapsulating described shell, described electrode terminal (101) is arranged on described cover plate (102), it is characterized in that, described cell (100) includes the current interrupt device (200) electrically connected with described electrode terminal (101), this current interrupt device (200) connects with the internal gas of described shell to disconnect the input or output current of described cell (100) under gas pressure, wherein, described current interrupt device (200) extends radially out described cover plate (102).

Cell the most according to claim 1, it is characterized in that, described current interrupt device (200) has electric-conductor (201) and is connected the flip piece (202) being electrically connected to each other with this electric-conductor (201), and described flip piece (202) can disconnect under gas pressure with described electric-conductor (201) and electrically connecting.

Cell the most according to claim 2, it is characterized in that, being formed with indentation (205) on described electric-conductor (201), this indentation (205) is arranged around the junction point being used for connecting described flip piece (202).

Cell the most according to claim 2, it is characterized in that, described electrode terminal (101) includes through described cover plate the pole (104) that electrically connects with described battery core, described current interrupt device is arranged on described pole (104), and wherein said electric-conductor (201) is connected on the outer end end face of described pole (104) to be electrically connected to each other.

Cell the most according to claim 4, it is characterized in that, described pole (104) is fixing with described cover plate (102) to be connected, and is formed with the described enclosure of connection and the inducing QI duct of described current interrupt device (200) on described pole (104).

Cell the most according to claim 2, it is characterized in that, described current interrupt device is arranged on described cover plate, wherein said electric-conductor has the body being connected with described flip piece and extends to described electrode terminal the connecting portion being connected with this electrode terminal, described body and described enclosure gas communication from this body.

Cell the most according to claim 2, it is characterized in that, described flip piece (202) is connected by boss Welding Structure with described electric-conductor (201), and this boss Welding Structure includes boss (203), the connecting hole (204) accommodating this boss (203) and the annular solder joint (217) being positioned between this boss (203) and connecting hole (204).

Cell the most according to claim 7, it is characterized in that, described flip piece (202) is formed as the first laminated structure, this first laminated structure is formed with described connecting hole (204), described electric-conductor (201) is formed as the second laminated structure, and this second laminated structure is formed described boss (203).

Cell the most according to claim 3, it is characterized in that, described indentation (205) is oval, and described junction point is rounded connecting point, and staggers along the long axis direction of described ellipse with the center of circle of described junction point in the center of circle of described indentation (205).

Cell the most according to claim 4, it is characterized in that, described flip piece (202) is coaxially disposed with described electrode terminal (101), and described electric-conductor (201) is obliquely installed relative to the axis of described electrode terminal (101).

11. cells according to claim 4, it is characterised in that be sealedly connected with ceramic ring (207) between outer peripheral edge and the described cover plate (102) of described flip piece (202).

12. 1 kinds of battery modules, including multiple cells (100), it is characterized in that, at least one cell is according to the cell described in any one in claim 1-11, wherein between adjacent described cell (100), described current interrupt device (200) mutually staggers with adjacent electrode terminal on the bearing of trend of short transverse and/or described cover plate.

13. battery modules according to claim 12, it is characterized in that, between adjacent described cell (100), described current interrupt device (200) mutually staggers with adjacent electrode terminal on the bearing of trend of described cover plate, and is connected by L-type connector (214) between described current interrupt device (200) with described adjacent electrode terminal.

14. battery modules according to claim 13, it is characterized in that, described L-type connector (214) has covering part (211) and lead division (212), described covering part (211) covers and is connected in described current interrupt device (200), and described lead division (212) extends to described adjacent electrode terminal.

15. battery modules according to claim 12, it is characterized in that, between adjacent described cell (100), described current interrupt device (200) mutually staggers with adjacent electrode terminal on the bearing of trend of described cover plate, described current interrupt device (200) includes the block (210) covering described flip piece, this block (210) extends to align with described adjacent electrode terminal along described cover plate (102), and is connected by electrode terminal adjacent with this for I type connector (215).

16. battery modules according to claim 12, it is characterised in that be provided with the quantity of cell of described current interrupt device (200) less than three.

17. 1 kinds of electrokinetic cells, including inclusion and the battery modules being arranged in this inclusion, it is characterised in that described battery modules is according to the battery modules described in any one in claim 12-16.

18. 1 kinds of electric automobiles, it is characterised in that this electric automobile is provided with electrokinetic cell according to claim 17.