CN205621793U - Battery module, power battery who contains this battery module and electric automobile - Google Patents

Battery module, power battery who contains this battery module and electric automobile Download PDF

Info

Publication number
CN205621793U
CN205621793U CN201620140683.5U CN201620140683U CN205621793U CN 205621793 U CN205621793 U CN 205621793U CN 201620140683 U CN201620140683 U CN 201620140683U CN 205621793 U CN205621793 U CN 205621793U
Authority
CN
China
Prior art keywords
cell
battery modules
battery
electric
interrupt device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201620140683.5U
Other languages
Chinese (zh)
Inventor
谢秀梅
周燕飞
公绪斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
Original Assignee
BYD Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN201620140683.5U priority Critical patent/CN205621793U/en
Priority to PCT/CN2016/097401 priority patent/WO2017143749A1/en
Application granted granted Critical
Publication of CN205621793U publication Critical patent/CN205621793U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Connection Of Batteries Or Terminals (AREA)

Abstract

The utility model provides a battery module, power battery who contains this battery module and electric automobile, battery module include the battery cell that n arranged in proper order, battery cell includes the shell, hold electric core in the shell, with electric electrode terminals and the encapsulation of being connected of this electricity core the apron of shell, electrode terminals set up on the apron, are located to be provided with the current interruption device of being connected with the electrode terminals electricity on tip and/or the central part's of battery module the battery cell the inside gaseous intercommunication of current interruption device and the shell electric current in order can break off the battery cell that flows through under the gas pressure action, the battery cell of the tip of battery module is the 1st and/or a n battery cell of battery module, when n was the odd number, the central part's of battery module battery cell was a n+12 battery cell, when n was the even number, central part's battery cell was a n2 battery cell and/or a n+22 battery cell, and n >= 3.

Description

A kind of battery modules, the electrokinetic cell comprising this battery modules and electric automobile
Technical field
This utility model relates to electrokinetic cell field, in particular it relates to a kind of battery modules and comprise this battery modules Electric automobile.
Background technology
Battery all plays an important role in all trades and professions as energy-storage units, and such as electrokinetic cell is widely used in new-energy automobile In field, wherein can have in the battery bag of electrokinetic cell and be serially connected into battery modules to realize filling by multiple cells The work of electric discharge.Wherein, electrokinetic cell is in charge and discharge process, generally by BMS(battery management system) monitoring voltage and electricity The change calculations charging state of stream.If voltage sample goes wrong, it is possible to cause over-charging of battery, especially for ternary system For, 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, by Current integrating method and open-circuit voltage method meter Calculate battery electric quantity, and control the charge and discharge management of battery with this.But there is also deficiency, such as battery voltage sampling or electric current are adopted Sample lost efficacy, or software failure, causes battery to charge for a long time and can not get controlling, particularly in the case of charging pile charges, When charging pile and battery manager communication failures, overcharging uncontrollable, over-charging of battery to a certain extent, can cause battery blow-up very To 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
This utility model proposes a kind of battery modules for above-mentioned technical problem, including n the monomer electricity being arranged in order Pond 100, described cell 100 includes shell, accommodates the electrode terminal 101 that battery core in the enclosure electrically connects with this battery core And encapsulating the cover plate 102 of described shell, described electrode terminal 101 is arranged on described cover plate 102, it is characterised in that be positioned at It is provided with on the end of battery modules and/or the cell of central part in the electric current electrically connected with described electrode terminal 101 Disconnected device 200, described current interrupt device 200 connects with the internal gas of described shell to disconnect stream under gas pressure Electric current through described cell 100；
The cell of the end of described battery modules is the 1st cell and/or the battery modules of battery modules N-th cell；When n is odd number, the cell of the central part of described battery modules is the (n+1)th/2 of battery modules Individual cell；When n is even number, the cell of the central part of described battery modules is the n-th/2 list of battery modules Body battery and/or the n-th+2/2 cell；Wherein n >=3.
Preferably, it is positioned on the end of described battery modules and the cell of central part and is provided with and described electrode Terminal 101 electrical connection current interrupt device 200, described current interrupt device 200 connect with the internal gas of described shell with The electric current of described cell 100 can be disconnected under gas pressure；The cell of the end of described battery modules is battery 1st cell of module and the n-th cell of battery modules；When n is odd number, the central part of described battery modules Cell is battery modules the (n+1)th/2 cell of position；When n is even number, the central part of described battery modules Cell is battery modules the n-th/2 cell or the n-th+2/2 cell；Wherein n >=3.
Preferably, the quantity of the cell being provided with described current interrupt device 200 is three.
Preferably, described current interrupt device is fixed relative to described cover plate 102.
Preferably, described current interrupt device 200 extends radially out described cover plate 102.
Preferably, described current interrupt device 200 has electric-conductor 201 and is connected mutually to be electrically connected with this electric-conductor 201 The flip piece 202 connect, and described flip piece 202 can disconnect under gas pressure with described electric-conductor 201 and electrically connecting.
Preferably, described electric-conductor 201 being formed with indentation 205, this indentation 205 connects described flip piece around being used for The junction point of 202 is arranged.
Preferably, described electrode terminal 101 includes through described cover plate the pole 104 that electrically connects with described battery core, institute Stating current interrupt device to be arranged on described pole 104, wherein said electric-conductor 201 is connected to the outer end end of described pole 104 To be electrically connected to each other on face, described pole 104 is fixing with described cover plate 102 to be connected, and is formed with connection on described pole 104 The inducing QI duct of described enclosure and described current interrupt device 200.
Preferably, described current interrupt device is arranged on described cover plate, and wherein said electric-conductor has and described upset The body that part is connected extends to described electrode terminal the connecting portion being connected with this electrode terminal with from this body, described Body and described enclosure gas communication.
Preferably, between adjacent described cell 100, described current interrupt device 200 in short transverse and/or Mutually stagger with adjacent electrode terminal on the bearing of trend of described cover plate.
Preferably, between adjacent described cell 100, described current interrupt device 200 prolonging at described cover plate Stretch and mutually stagger with adjacent electrode terminal on direction, and described current interrupt device 200 and described adjacent electrode terminal Between connected by L-type connector 214.
Preferably, described L-type connector 214 has covering part 211 and lead division 212, and described covering part 211 covers and connects In described current interrupt device 200, described lead division 212 extends to described adjacent electrode terminal.
Preferably, between adjacent described cell 100, described current interrupt device 200 prolonging at described cover plate Stretching and mutually stagger with adjacent electrode terminal on direction, described current interrupt device 200 includes the block covering described flip piece 210, this block 210 extends to align with described adjacent electrode terminal along described cover plate 102, and by I type connector 215 The electrode terminal adjacent with this is connected.
This utility model further provides a kind of electrokinetic cell, including inclusion and the battery mould being arranged in this inclusion Group, it is characterised in that described battery modules is the battery modules that the application proposes.
This utility model also proposed a kind of electric automobile, it is characterised in that this electric automobile is provided with described above Electrokinetic cell.
Preferably, described electrokinetic cell is located close to the position of the electromotor of electric automobile.
This utility model passes through technique scheme, when battery in use occurs extremely causing inside battery air pressure During increase, can start the current interrupt device being arranged on cell, current interrupt device is at inside battery gas pressure The charge-discharge circuit of lower disconnection cell, it is to avoid after battery appearance is abnormal, inside battery air pressure persistently raises and explodes.This In application, current interrupt device is arranged on the end of battery modules and/or the cell of central part, works as battery modules When being in hot environment, such as battery modules is in the position of the electromotor near electric automobile or is provided with this battery modules Electric automobile when being in outdoor high temperature environment, affected by external high temperature environment, the cell of the end of battery modules Temperature high compared with the temperature of the cell at other positions of battery modules, therefore, when the abnormality of the battery occurs, the end of battery modules The temperature of the cell in portion is more than the temperature of the cell at other positions of battery modules, the end of corresponding battery modules The air pressure within cell more than the air pressure within cell at other positions of battery modules, this kind of situation is arranged on electricity Current interrupt device on the cell of the end of pond module is preferentially activated, and forms open circuit protection；When battery modules is in During normal temperature environment, owing to the monomer at heat radiation relatively other positions of battery modules of the cell of battery modules central part is electric The radiating effect in pond is poor, and therefore, when the abnormality of the battery occurs, the temperature of the cell of battery modules central part is more than electricity The temperature of the cell at other positions of module, pond, the air pressure within cell of corresponding battery modules central part is big The air pressure within cell in other positions of battery modules, this kind of situation is arranged on the monomer electricity of battery modules central part Current interrupt device on pond is preferentially activated, and forms open circuit protection.Thus, no matter which kind of environment is battery modules be under, when When battery occurs abnormal, it is arranged on the electric current on the cell of the end of battery modules and/or the cell of central part Interrupting assembly first to open, therefore, the application is by the cell in the end of battery modules and/or the monomer of central part Current interrupt device is set on battery, it is possible to improve the security reliability of battery further.
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, with following Detailed description of the invention be used for explaining this utility model together, but be not intended that restriction of the present utility model.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 signal of the sectional structure under flip piece and electric-conductor confined state in this utility model the first embodiment Figure；
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 herein Described detailed description of the invention is merely to illustrate and explains this utility model, 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 " is usual Being to define on the basis of the page of respective drawings, " inside and outside " refers to the interior and outer of corresponding component profile.If Fig. 1 is to figure Shown in 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 Electrokinetic cell is formed in inserting battery bag.Additionally, in addition to electrokinetic cell field, the various technical sides provided in this utility model Case can also be widely used in other field of batteries.Specifically, this utility model is situated between by the first to the 5th embodiment Continue involved cell 100,1100,2100,3100,4100, be 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 will In conjunction with accompanying drawing, each embodiment is described in detail.
First, as shown in Fig. 1 to Figure 24, each embodiment of this utility model is provided which a kind of battery modules, including many Individual cell 100,1100,2100,3100,4100, wherein, cell can include shell, accommodate electricity in the enclosure The cover plate 102 of electrode terminal 101,1101,2101,3101,4101 that core electrically connects with this battery core and package casing, 1102, 2102,3102,4102, wherein electrode terminal is arranged on the cover board, for the input and the output that complete electric current.Wherein, monomer Current interrupt device 200,1200,3200,4200 or explosion-proof valve 2200 is included, this current interrupt device or explosion-proof in battery Valve electrically connects with electrode terminal, therefore by the effect of current interrupt device, can control electrode terminal electric current input and Output.I.e. for the state of battery core conducting, now electrode under current interrupt device or explosion-proof valve conventional sense in single cells 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, and example When occurring overcharging such as battery, current interrupt device or explosion-proof valve can interrupt electric current input and the electric current output of electrode terminal, Thus avoid battery that problems such as overcharging occurs.Accordingly, as important safety measure, the reliability of current interrupt device is to closing weight Want, i.e. need current interrupt device quickly to respond.It addition, 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, it is also possible to fixing Arbitrarily it is being connected or on parts relatively-stationary with cover plate with cover plate, such as, is being arranged on the electrode terminal on setting and cover plate.
In this utility model, current interrupt device or explosion-proof valve in each embodiment are the mechanical of induction air pressure and tie Structure, specifically, the enclosure gas communication of current interrupt device and cell also can act on disconnection under pneumatic pressure and flows through Electric current.Specifically can connect to come by the parts of breaking inner the transmission of interruptive current, thus cut off filling of battery in time Electric discharge.The air pressure source wherein utilized is: when overcharging occurs in such as battery etc. during precarious position, inside battery can produce gas Body makes the air pressure of enclosure raise then, or when battery in use occur abnormal cause battery temperature to raise and Inside battery air pressure is raised, thus produces 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 have electric-conductor 201 and with this conduction Part 201 is connected with the flip piece 202 being electrically connected to each other, and flip piece 202 can disconnect with electric-conductor 201 under gas pressure Electrical connection, wherein in the different embodiments in this utility model, the mode disconnecting electrical connection can be different, can be wherein to lead Junction point between electricity part and flip piece disconnects, such as, pull solder joint therebetween to realize the disconnection of electrical connection, it addition, Can also be itself disconnection of at least one in the two, such as, realize this by processing the indentation of weakness on corresponding component The disconnection of body structure, thus realize the disconnection of electrical connection.I.e., it is achieved this utility model disconnects under gas pressure frame for movement Cut off the purpose of 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 gas then Pressure raises, and now under certain gas pressure, flip piece 202 is electrically connected with electric-conductor 201 disconnection by rotary movement, from And interrupt electrode terminal 101 and extraneous circuit, stop the charging of battery, thus avoid the air pressure of inside battery to continue to raise, Ensure the safety of battery.
In the present embodiment, electrode terminal 101 includes the pole 104 electrically connected with battery core, such as by interior leading-out piece Being connected with battery core, wherein pole 104 passes to be drawn from shell by electric current from cover plate 102.Wherein, in present embodiment In, current interrupt device 200 can be arranged on pole 104.So directly can experience inside battery by pole 104 Air pressure, highly sensitive, additionally can avoid current interrupt device 200 being attached with electrode terminal separately, convenient processing.
According to a kind of embodiment of the present utility model, described battery modules includes n the cell being arranged in order 100, described cell 100 include shell, accommodate electrode terminal 101 that battery core in the enclosure electrically connects with this battery core with And encapsulating the cover plate 102 of described shell, described electrode terminal 101 is arranged on described cover plate 102, it is characterised in that battery mould It is provided with and described electrode terminal at least one in the cell of end of group and/or the cell of central part The current interrupt device 200 of 101 electrical connections, described current interrupt device 200 fixing relative to described cover plate 102 and with described outside The internal gas of shell connects with the electric current that can disconnect described cell 100 under gas pressure；
The cell of the end of described battery modules is the 1st cell and/or the battery modules of battery modules N-th cell；When n is odd number, the cell of the central part of described battery modules is the (n+1)th/2 of battery modules Individual cell；When n is even number, the cell of the central part of described battery modules is the n-th/2 list of battery modules Body battery and/or the n-th+2/2 cell；Wherein n >=3.
Preferably, in the present embodiment, on the cell of the end of described battery modules and the monomer of central part Being provided with the current interrupt device 200 electrically connected with described electrode terminal 101, described current interrupt device 200 is relative to described Cover plate 102 is fixing and connects with the internal gas of described shell to disconnect described cell 100 under gas pressure Electric current；The cell of the end of described battery modules is the 1st cell and n-th list of battery modules of battery modules Body battery；When n is odd number, the cell of the central part of described battery modules is the (n+1)th/2 monomer of battery modules Battery；When n is even number, the cell of the central part of described battery modules is the n-th/2 cell of battery modules Or the n-th+2/2 cell；Wherein n >=3.
Preferably, the quantity of the cell being provided with described current interrupt device 200 in the present embodiment is three； Three cells being provided with described current interrupt device 200 are respectively cell and the battery modules of battery modules end The cell of central part；The cell of the end of described battery modules is the 1st cell of battery modules The n-th cell with battery modules；When n is odd number, the cell of the central part of described battery modules is battery The (n+1)th/2 cell of module；When n is even number, the cell of the central part of described battery modules is battery mould The n-th/2 cell of group or the n-th+2/2 cell.By the monomer electricity in the end of battery modules and central part Current interrupt device is set on pond, and the cell arranging current interrupt device is three, not only reduces cost simplified Technique, can also play the effect of overcurrent protection simultaneously very well, and battery security is high.
In this utility model, owing to, in the field of such as electrokinetic cell, needing the electric current passed through bigger, it is therefore desirable to protect The Welding Structure of card electric-conductor 201 and flip piece 202 is stable, it is to avoid big current fusing Welding Structure.So, in present embodiment In, 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, accommodate the connecting hole 204 of this boss 203 and the annular solder joint between this boss 203 and connecting hole 204 217.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.Therefore protect Card annular solder joint 217 can stably will be received in boss 203 firm welding in connecting hole 204, and can increase electric current Circulation area ensure the passing through of big electric current.Specifically, as a kind of embodiment, boss 203 can be formed at electric-conductor 201 On, connecting hole 204 can be formed on flip piece 202, more specifically, flip piece 202 is formed as the first laminated structure, this is first years old Being formed with connecting hole 204 in laminated structure, electric-conductor 201 is formed as the second laminated structure, and this second laminated structure is formed Boss 203.In other embodiments, the two can be with transposition.Additionally in some modes, it is also possible to use laser penetration Flip piece 202 and electric-conductor 201 are welded by the modes such as weldering.
Wherein, in the present embodiment, the mode realizing disconnecting electrical connection between flip piece and electric-conductor can be by indentation Realize, i.e. process intensity less than the weak point in other regions in appropriate section, wherein in order to complete electric-conductor and flip piece Being fully disconnected, 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 Can also be formed on electric-conductor, in the present embodiment, electric-conductor 201 be formed with indentation 205, this indentation 205 around with In the junction point of connection flip piece 202, i.e. the annular indentation around boss 203 is set at electric-conductor 201.So, when battery Air pressure inside rise time, the air pressure being subject to, indentation 205 can be promoted to be pulled off so that be scored 205 around electric-conductor 201 parts can depart from electric-conductor 201 with flip piece 202, thus realizes the disconnection of electric current.In other embodiments, indentation is also Can 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 by gas During pressure effect, 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 be first Tear initiation, thus increase the sensitivity that indentation 205 is pulled off.Further, in the present embodiment, boss 203 is circular, and And the center of circle of the center of circle of the indentation 205 of ellipse and boss 203 staggers along the long axis direction of this ellipse.So so that ellipse The region unbalance stress at circular major axis two ends, consequently facilitating break indentation 205 from partial points, and then promotes the spirit of indentation 205 Sensitivity.
Being coaxially disposed furthermore it is also possible to arrange electric-conductor flip piece 202 with electrode terminal 101, electric-conductor 201 is relative to electricity The axis of extreme son 101 is obliquely installed.As such, it is possible to make the indentation of lower position to be first pulled off, thus increase quarter The sensitivity that trace 205 is pulled off.Further, when indentation 205 is oval, major axis and the electric-conductor of ellipse can be designed Axis be obliquely installed, also tilt with the axis of pole when electric-conductor is arranged on pole 104.Consequently facilitating major axis end First the region that curvature is bigger is torn, thus ensures that indentation 205 can normally be broken when needed, it is ensured that current interruptions fills Put the normal work of 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 is opened on indentation 205 It is provided with 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.Except subtracting Outside weak 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 electric Gas within pond 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 to the outer end of pole 104 On end face, the outer peripheral edge of flip piece 202 is fixed relative to cover plate 102.So, under gas pressure, with the periphery of flip piece 202 Edge can be pulled off as the strong point, the indentation 205 being formed on electric-conductor 201.It addition, so that flip piece 202 can By gas pressure, the outer peripheral edge of flip piece can be sealed, be tightly connected on the cover board for example with welding manner, 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 along pole Axial direction define relative to shell, and relative to " inside and outside " of ring-shaped article, be then radially phase such as outer peripheral edge The center of this ring-shaped article is defined.
In order to ensure electric-conductor 201 and pole 104 fixing in the case of, indentation 205 thereon can also be pulled off, excellent Selection of land, the outer end end face of this pole 104 is formed receiving hole 218, and the outer peripheral edge of electric-conductor 201 is fixed on the interior of this receiving hole On wall.So, electric-conductor 201 stably can be fixed by annular profile, and the region within indentation 205 not with pole 104 occur to connect 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 the present invention, current interrupt device 200 has multiple with the mode of inside battery gas communication, in present embodiment In, pole 104 is formed connection enclosure and the inducing QI duct of current interrupt device 200.Thus, directly pass through pole The internal structure of 104 applies air pressure to current interrupt device.Make structure simpler.
Wherein, above-mentioned inducing QI duct includes two kinds of gas ports 103, wherein the first gas port in the present embodiment 103, for connecting above-mentioned receiving hole 218 and enclosure, i.e. directly press to electric-conductor 201 and thrust indentation 205.That is, lead Pore road includes the gas port 103 for connecting above-mentioned receiving hole 218 and enclosure.The second gas port 103 is for even Logical flip piece 202 and enclosure, thus break 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 to be connected, so that electrode terminal structure Firm.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 To process the second gas port 103 thereon so that gas flow to flip piece 202.Additionally, in the present embodiment, the A kind of gas port 103 is circumferentially formed in pole 104.That is, the gas port 103 being positioned on radial direction boss 105 is for upset Part 202 presses, and electric-conductor 201 then can directly be pressed by the gas port 103 below receiving hole 218.As it is shown in figure 9, at this The radial direction boss 105 of the pole 104 in inventive embodiments and body have been respectively formed on gas port 103, wherein first on body Plant gas port 103 to connect with the receiving hole 218 on end face, and number is four and arranges the most at equal intervals.Real at other Executing in example, the number of the first gas port 103 can also be other quantity, and the present invention is without limitation.
As shown in Fig. 2, Fig. 3, Fig. 8 and Figure 10, in order to avoid cover plate is charged, it is preferable that pole 104 is that cover plate is fixing even Needing while connecing to insulate with cover plate, therefore, pole 104 is fixedly connected on the ceramic ring 207 being sealedly attached to cover plate 102, Such as it is attached by Ceramic brazing.So, comparing the insulation that plastics, rubber etc. realize, reliability and weatherability are higher, no The robust seal that only can realize current interrupt device connects, additionally it is possible to realize the insulation of the two.Specifically, outside pole 104 End periphery has radially boss 105, and 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, i.e. radially the thickness of support 208 is relatively Thin to form the stepped ramp type receiving space embedded for pole 104.
As shown in figure 11, in another embodiment of present embodiment, it is different from above by offering inducing QI on pole The ventilating mode in hole 103, 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, and radially supporting 208 is also multiple and circumferentially spaced setting, and multiple radial convex Platform and multiple radial direction support one_to_one corresponding.As such, it is possible to by supporting between 208 with radial direction between adjacent radial boss 105 Interval realizes ventilation, and structure is simpler ingenious, easy to process, it is not necessary to additionally offer 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 chi Very little and ensure the sensitivity broken.In this embodiment, radially boss 104 is three be equally spaced, steady to take into account connection Qualitative 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 ladder knot with inner ring and outer ring Structure, 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 Support for overall ring-type radial direction, and in the embodiment of split type radial direction boss, inner ring then forms above-mentioned multiple intervals and sets The radial direction put 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, it is preferable that on the outer face of ceramic ring 207 Being sealedly connected with conducting ring 216, be specifically connected on outer ring, the outer peripheral edge of flip piece 202 is fixedly connected on this conducting ring 216 On, i.e. flip piece 202 is connected on ceramic ring 207 by conducting ring, and flip piece can be set up electric current with the external world and return by conducting ring Road.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 passes through ceramic ring Insulation.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, 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 this is outer The block 210 that periphery sets this flip piece 202 by cover is sealedly connected on this L-type seam.Thus realizing the steady of flip piece 202 While fixed sealing assembling, current interrupt device 200 can be played a protective role.It addition, conducting ring 216 can by with Block is connected or the electrode leading-out sheet that is joined directly together sets up current loop with the external world, such as with adjacent cell 100 it Between, 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 be tightly connected on the inner face of ceramic ring 207 Having transition rings 209, this transition rings 209 can be connected by Ceramic brazing with ceramic ring 207, and this transition rings 209 seals even It is 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.Due to ceramic ring 207 Directly do not assemble with cover plate 102, it is to avoid cover plate 102 is high temperature when ceramic ring carries out soldering, additionally will not be to ceramic ring The area of 207 causes restriction owing to needs and cover plate 102 directly assemble, and is not required to ceramic ring 207 is carried out special setting Meter, manufactures and easy to assembly.
Wherein, as shown in Figure 8, it is preferable that transition rings 209 has inner ring and outer ring, cover plate 102 shape forming Z-type structure Becoming and have the through hole passed for pole 104, the end face of this through hole is ledge structure, and the inner ring of transition rings embeds and is supported on ledge structure In.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 Sealed, be specifically sealedly connected with ceramic ring 207 between outer peripheral edge and the cover plate of flip piece, thus pass through the close of ceramic structure Envelope realizes the stable of current interrupt device and work reliably.In this ceramic seal structure, in particular by cover plate and mistake Cross each self sealss between ring, transition rings and ceramic ring, ceramic ring and conducting ring and conducting ring and flip piece so that in shell The air pressure in portion 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 is respectively and between conducting ring 216, pole 104 and transition rings 209 It is tightly connected by Ceramic brazing.I.e. first this can be constituted an independent assembly, then by by transition Ring 209 leads to Laser Welding and is assembled on cover plate 102, easy to assembly without directly being welded on the cover plate of soldering by pottery.It addition, conduction Part 201 can use Laser Welding to be connected with pole 104, and flip piece and electric-conductor can use laser fuU penetration welding or above-mentioned boss The welding manners such as Welding Structure are connected, and block 210 can be connected by Laser Welding with conducting ring.Additionally, pole 104 can be with electricity The lead-out tablet of core is laser welded, thus completes 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, is explained below the first embodiment party The arrangement of the current interrupt device in formula.
In order to ensure that the normal of the driving current interrupt device of above-mentioned air pressure works timely, current interruptions can be filled The size design put relatively big, so and in the case of air pressure is immutable, increases pull-off force by increase lifting surface area.Example The pull-off force of flip piece is promoted more greatly as designed the area of flip piece.In the present embodiment, as it is shown in figure 1, design current Interrupt device 200 and extend radially out cover plate 102, thus increase size.Now in battery modules, cell 100 is many Individual, between neighboring unit cell 100, in order to avoid the current interrupt device 100 extended hinders on neighboring unit cell 100 Electrode terminal, it is preferable that current interrupt device 200 on the bearing of trend of short transverse and/or cover plate with adjacent electrode Terminal mutually staggers.So can make full use of cover plate 102 and be not provided with the region of electrode terminal 101 so that in the electric current of protrusion Disconnected device will not interfere with the structure on adjacent cover plate, fully saves the space in battery bag, improves the energy density in inclusion. Wherein it should be noted that the present invention herein and following between neighboring unit cell, current interrupt device is with adjacent Electrode terminal, or electrode terminal each means the company of adjacent feature between different monomers battery with the implication of adjacent electrode terminal Connect rather than the connection of adjacent feature on same cell.
In the present embodiment, current interrupt device 200 and adjacent electrode terminal 101 on cover plate bearing of trend mutually Stagger.In other embodiments, the two can also the most mutually stagger.
As a kind of embodiment, as it is shown in figure 1, between adjacent cell 100, current interrupt device 200 and phase Being connected by L-type connector 214 between adjacent electrode terminal, this L-type connector 214 has covering part 211 and lead division 212, covers Cap 211 covers and is connected in current interrupt device 200, and lead division 212 extends to adjacent electrode terminal with adjacent thereto.Its In, the inflection structure of L-type as described in Figure 1 can first extend to adjacent electrode terminal on the bearing of trend of cover plate right Then re-extending into this electrode terminal together, in other embodiments, first L-type connector can also extend to adjacent cover plate On, then extend to electrode terminal, thus realize the electrical connection of the two.
As another kind of embodiment, as in figure 2 it is shown, between adjacent cell 100, current interrupt device 200 is wrapped Including the block 210 covering flip piece 202, this block 210 extends to align with adjacent electrode terminal along cover plate 102, i.e. has The covering part 211 of straight line and lead division 212, and by linear I type connector 215 and adjacent electrode terminal phase Even.This I type connector 215 can be also used for connecting the electrode being not provided with current interrupt device 200 between other cells 100 Terminal 101, so, by the block 210 of this shape, only need to use this kind of even so that basic in integral battery door module Fitting.
It is different from the above-mentioned embodiment shown in Fig. 2, as shown in figure 12, it is also possible to by increasing the side of cell 100 Formula carrys out adaptive bigger current interrupt device.Specifically, between neighboring unit cell 100, it is provided with current interrupt device 200 The width of cell 100 more than being not provided with the width of cell of current interrupt device 200, and current interrupt device 200 extend close to the widthwise edges of cover plate 102, thus are 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, because of This is so that adjacent electrode terminal is mutually aligned.The most equally avoid extending the current interrupt device of cover plate 102 Other structures such as the Welding Structure on 200 pairs of connected cover plates 102 impact.And preferably, so that current interruptions fills Put and be connected by linear I type connector 215 with adjacent electrode terminal.
The most in use, although increase the width of cell 100, but do not increase battery core capacity, i.e. set The battery core capacity being equipped with in the cell 100 of current interrupt device 200 and the cell 100 being not provided with current interrupt device In battery core capacity identical, thus avoid existing the cell of different capabilities under same module, and avoid the shadow to BMS Ring.Wherein, owing to battery core capacity is identical, the size exceeded of enclosure can use dividing plate to be filled with, i.e. around battery core It is filled with dividing plate.So that the assembling Stability Analysis of Structures of battery core.Wherein consider the size of battery modules and the size of monomer, electricity The ratio of the volume of 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, at multiple cells 100 of same module from current interruptions effect and cost and assembling In, the quantity of cell of current interrupt device 200 is set less than three；Preferably, current interrupt device is set The quantity of the cell of 200 is 3；Preferably, the cell arranging current interrupt device 200 is to be positioned at battery modules End and the cell of central part；Wherein, if battery modules includes the cell that n is arranged in order, then pond module The cell of end 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, institute State cell is battery modules the n-th/2 cell or the n-th+2/2 cell of the central part of battery modules, Wherein n >=3.
Above describe the current interrupt device of first embodiment of the invention offer, cell, battery modules, not Departing under present inventive concept, such as, boss Welding Structure, oval indentation, ceramic ring etc. are all for the feature in the first embodiment Can apply with other following embodiments, introduce what second embodiment of the invention provided below in conjunction with Figure 13 to Figure 17 Electrokinetic cell.
As shown in Figure 13 and Figure 14, second embodiment of the present invention provides a kind of cell 1100, this cell 1100 include shell, accommodate electrode terminal 1101 and the lid of package casing that battery core in the enclosure electrically connects with this battery core Plate 1102, described electrode terminal 1101 is arranged on cover plate 1102 input and output for electric current.Wherein this monomer is simple 1100 also include the current interrupt device 1200 that the internal gas with shell connects, and are arranged on electrode tip in the first embodiment Unlike mode on son, current interrupt device 1200 arranges on the cover board and connects with the internal gas of shell, wherein should 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, turns over Turn part 1202 to disconnect under gas pressure with electric-conductor 1201 and electrically connecting.That is, the work of this current interrupt device 1200 is former Manage essentially identical with the current interrupt device in the first embodiment, be all that the air pressure by experiencing in cell realizes upset The upset of part and disconnecting circuit.
Wherein, owing to being not arranged on electrode terminal, electric-conductor 1201 has the body being connected with flip piece 1202 1299 extend to electrode terminal 1101 connecting portion 1298 being connected with this electrode terminal 1101 with from this body 1299, therefore By in the second embodiment, current interrupt device 1200 is arranged on the cover board, so can avoid increasing electrode terminal The height of 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 inside gas of the body 1299 of electric-conductor 1201 and shell Body connects and is formed with indentation 1205, and this indentation 1205 is around the junction point setting for connecting flip piece 1202.It is thus possible to Enough under air pressure inside effect, break this indentation, thus disconnect the electrical connection between flip piece and electric-conductor.Further, indentation Passage 1206 it is provided with on 1205.So, air pressure is made can be applied to flip piece not only by passage 1206 On 1202, and by flip piece pulling force actual to indentation, and the position at this passage 1206 can be facilitated to break housing 1205, play 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 along the setting of indentation 1205 interval.Further for the feature such as indentation and passage, in the first embodiment Feature all may apply in present embodiment.In other embodiments, permissible on the body of electric-conductor and flip piece It is respectively arranged with indentation.So, when the air pressure of enclosure constantly rises, except the indentation broken on electric-conductor carrys out interruptive current Outside, it is also possible to continuing the indentation breaking on flip piece, now the gas of inside battery can fill at flip piece and outwards release, and The air pressure in the shell of cell is avoided to continue to increase and ensure.Furthermore it is also possible to allow the gas sensor in battery inclusion Induction alarm or cut-out circuit.This part will be discussed in detail in follow-up.
Specifically, the indentation 1205 on body can be broken, on flip piece under the first gas pressure in the enclosure Break under the effect of indentation the second air pressure the most in the enclosure, and the second air pressure is more than the first air pressure.I.e. first indentation strong Degree is less than the second indentation, can be broken by the first less air pressure.Only just continue to break second when air pressure continues and raises Indentation 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, flip piece 1202 Outer peripheral edge is tightly connected with electric-conductor 1201, to prevent gas from the pressure release of flip piece outer peripheral edge.Specifically, cover plate 1102 is offered Have and the passage of enclosure gas communication, and on cover plate, be sealedly connected with the first ceramic ring 1207 around passage, Body 1299 is sealedly connected on this first ceramic ring 1207, so that air pressure inside can act on body 1299 And do not leak.In addition to stably assemble flip piece 1202, the outer peripheral edge of flip piece 1202 is sealedly connected on the second ceramic ring On 1296, and this second ceramic ring is sealedly connected on electric-conductor 1201.Therefore by the insulation characterisitic of the second ceramic ring, both Can stably support the outer peripheral edge of this flip piece 1202 can also make the outer peripheral edge of electric-conductor and flip piece 1202 by the Two ceramic rings 1296 insulate, and so can remain open electricity after flip piece 1202 and electric-conductor 1201 are broken by indentation 1205 Stream connects, thus plays the effect of current interruptions.
Specifically, as a kind of embodiment, as shown in figure 17, the body 1299 of electric-conductor 1201 was formed around quarter The annular boss 1297 of trace 1205, so, by the structure of this annular boss 1297, its inner side radially may be used for being formed carves The features such as trace 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, the present invention the second embodiment party By the unique texture of the electric-conductor described in Figure 16 in formula, 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 mistake Cross ring 1209 and there is 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, without One ceramic ring 1207 is directly connected with cover plate 1102.
In the present embodiment, connect for convenience, it is preferable that electrode terminal 1101 include through cover plate 1102 and with electricity The pole 1104 of core electrical connection, the connecting portion 1298 of electric-conductor 1201 is formed with slot 1295, and pole 1104 penetrates this slot In 1295 and be welded to each other, thus realize being stably connected with of the two.It addition, current interrupt device 1200 includes covering at flip piece The connector 1210 electrically connected on 1202 and with this flip piece 1202, this connector 1210 has the covering covering flip piece 1202 Portion 1294 and the lead division 1293 extended from this covering part 1294.Wherein this connector 1210 can be formed as implementing with first The structure that L-type connector 214 in mode is identical, i.e. covering part and lead division is formed as L-type inflection structure.Consequently facilitating by electricity Stream 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 is along footpath To extending described cover plate, thus increase lifting surface area and increase pull-off force.Between neighboring unit cell, current interrupt device Mutually stagger on cover plate 1102 bearing of trend with adjacent electrode terminal, thus avoid 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 Individual.
Above describe the electrokinetic cell that second embodiment of the invention provides, wherein essentially describe and the first embodiment party The feature that formula is different, in the case of reconcilable, the feature of two embodiments can mutually replace, combine, to this present invention couple This does not do and too much repeats.
Introducing, below in conjunction with Figure 18, the cell 2100 that third embodiment of the invention provides, this includes shell, receiving Electrode terminal 2101 that battery core in this shell electrically connects with this battery core and the cover plate 2102 of package casing, electrode terminal 2101 are arranged on cover plate 2102, and wherein cell includes the first electrode leading-out piece 2298, Yi Jiyu electrically connected with battery core Second electrode leading-out piece 2297 of electrode terminal 2101 electrical connection, cover plate 2102 is additionally provided with the internal gas with shell and connects Explosion-proof valve 2200, this explosion-proof valve 2200 have connection the first electrode leading-out piece 2298 and upset of the second electrode leading-out piece 2297 Part 2202, i.e. two electrode leading-out pieces are connected by this flip piece 2202.
Wherein, the first electrode leading-out piece 2298 and/or the second electrode leading-out piece 2297 are formed with the first indentation 2205, should First indentation 2205 can disconnect interrupting the first electrode leading-out piece 2298 and/or the second electrode under gas pressure in the enclosure Electric current on leading-out piece 2297, the i.e. effect of this first indentation be so that arrange its electrode leading-out piece disconnect thus middle power-off The transmission of stream, therefore at least one in two electrode leading-out pieces is provided with the first indentation and can realize battery core and electrode terminal The disconnection of electrical connection, makes cell disconnect with the transmission of extraneous electric current then.It addition, be additionally provided with on flip piece 2202 Two indentations 2299, this second indentation 2299 can disconnect so that the gas in shell is via turning under gas pressure in the enclosure Turning part 2202 outwards to release, the effect of the i.e. second indentation is ventilation, upon opening so that internal gas leaks, thus keeps away Exempt from the continuation rising of inside battery air pressure 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 in the enclosure The second air pressure effect under break, and the second air pressure is more than the first air pressure.The intensity of the i.e. first indentation 2205 is less than second The indentation of indentation 2205, can be broken by the first less air pressure.Only just continue to break second when air pressure continues and raises Indentation 2205 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 break Opening electric current, the first indentation 225 extends to opposite side edge, so can make along the width of this long chip architecture from a lateral edges Obtaining long chip architecture can be more in time along the first indentation fracture.Wherein flip piece 2202 could be formed with ring-type outer wall, two electricity Pole leading-out piece can be fixedly connected on ring-type lateral wall, to realize electric current transmission.Specifically, in the present invention, this flip piece Ring-type outer wall can be formed by the boss in such as boss Welding Structure, flip piece is also formed with conical ring structure in addition, should 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 is permissible Circumference around flip piece is formed as circulus, thoroughly to disconnect under gas pressure, increases air venting efficiency.Specifically Second indentation may be formed in conical ring structure.So that flip piece effectively can be broken the first indentation and by gas pressure Two indentations, 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 leak in the case of not breaking the first indentation and the second indentation and make two indentations ineffective.On the other hand, logical Crossing insulation connection can avoid cover plate charged.
In the present embodiment, electrode terminal 2101 includes the pole through cover plate, this pole by the second ceramic ring with The outside insulation of cover plate is connected, in order to set up current loop with the external world.It is to pass through electrode tip between the most adjacent cell Being connected with each other of son realizes.Wherein cover plate can be avoided charged by ceramic ring.It addition, the outer peripheral edge of flip piece 2202 with It is sealedly connected with the first ceramic ring 2207 between cover plate, plays 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, flip piece It can be aluminium flake that the periphery of 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, can be first First two transition plates are welded on ceramic ring by brazing mode, then two stators are being welded with other structures Connect, 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 lead to Cross the first ceramic ring 2207 to realize sealing, consolidating and the 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 ceramic ring Two annular end face.Furthermore it is preferred that cover plate 2102 is formed with annular boss, it is ring-type convex that First Transition sheet 2205 is supported on this On platform, ceramic ring is close to the inwall of this annular boss and is extended towards the second transition plate 2296, thus by by ceramic ring stably It is 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 at flip piece Above in the of 2202, in particular it is connected to away from the First Transition sheet 2295 of flip piece.Protecting film 2099 the most under normal circumstances Can play the protective action within explosion-proof valve 2200, and when needs are explosion-proof, can be broken through by certain air pressure, such as Two air pressure, thus avoid affecting the explosion-proof effect of explosion-proof valve.
It addition, the present invention is pulled off to realize the priority of two indentations, the residual thickness of the first indentation and the second quarter The ratio of the residual thickness of trace is 1:3-1:1.2.It is further 1:2-1:1.3.
Above describe the cell that third embodiment of the invention provides.Introduce the present invention below in conjunction with Figure 22 to provide The 4th embodiment.
4th embodiment of the present invention provides a kind of cell 3100 and uses the battery modules of this cell. This cell 3100 includes shell, the battery core being contained in this shell, the cover plate 3102 of package casing and is arranged on cover plate Electrode terminal 3101 on 3102, wherein, cell 3100 also includes the interior leading-out piece 3299 electrically connected with battery core and connects It is connected on the current interrupt device 3200 between interior leading-out piece 3299 and electrode terminal 3101, wherein, is different from the first embodiment In be arranged on the mode of outer end on pole, the current interrupt device 3200 in present embodiment be positioned at inside cover plate 3102 and with The internal gas of shell connects can disconnect the electric current flowed through under gas pressure, wherein, electrode terminal 3101 connects and has The adaptor 3298 extended radially outward from outer peripheral edge, to connect the periphery of current interrupt device by this adaptor 3298 Edge.
So, the adaptor 3298 extended radially outwards due to the outer peripheral edge having from electrode terminal so that with adaptor The current interrupt device that 3298 radial outsides are connected, compares the mode being directly connected with electrode terminal, and its area can design Bigger, thus increase air pressure inside and electrode is interrupted the force area of device, thus can promote in the case of air pressure is constant Electrode interrupts the stress of device, and motor current interrupts the sensitivity of device 3200, completes the cut-out of electric current in time.The most especially Be in the battery applications of the present invention in the big field of batteries such as electrokinetic cell, owing to generally requiring the big electric current of transmission, therefore increase Adaptor and high current interrupt the size of device the transmission utilizing big electric current.
In the present embodiment, adaptor 3298 is formed as circulus, the inner peripheral of this circulus and electrode terminal Outer peripheral edge be connected, outer peripheral edge is connected with the outer peripheral edge of current interrupt device, thus plays increase current interrupt device area Effect, in other embodiments, adaptor 3298 can also be for radially extend and multiple connections of circumferentially spaced setting The structure of post, is capable of increasing the effect of the area of current interrupt device equally.
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, tool Seam can be formed body on the inner outer peripheral edge of electrode terminal, and the inner peripheral of adaptor embeds in this seam and phase Connect, thus increase connection area and can increase electric current transmission efficiency while ensureing stable connection.Wherein electrode terminal is interior Outer end defines along its axial direction relative to shell, i.e. close to enclosure for the inner.
It addition, in the present embodiment, the outer peripheral edge of circulus is projecting inward towards described shell, i.e. makes circulus Itself 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 even Connect firm increase electric current transmission efficiency and also can spaced apart current interrupt device and electrode terminal so that be current interruptions Device disconnection under gas pressure provides space.
In the present embodiment, interior leading-out piece 3299 includes the connection sheet (not shown) being connected with battery core, this connection sheet from Battery core extends towards cover plate direction.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 avoids 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 Individual sidewall is connected with the connecting plate of both sides respectively.It addition, so that current interrupt device and enclosure gas communication, permissible It is formed and the air passing hole of enclosure gas communication on the diapire of design support slot.
In the present embodiment, in order to avoid cover plate is charged, interior leading-out piece 3299 is connected to by ceramic member 3296 insulation The inner side of cover plate 3102.Specifically, ceramic member 3296 can be formed as potsherd, and respectively by transition plate 3294 and interior extraction Part 3299 and cover plate are weldingly connected, i.e. transition plate 3294 is two panels, and this transition plate can be aluminium flake, lays respectively at ceramic member 3296 Upper and lower surface, 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, from And make being welded to connect between ceramic member 3296 and cover plate 3102 and interior leading-out piece 3299 be more easy to realize, and Welding Structure Stable.Wherein ceramic member 3296 can be connected by Ceramic brazing with between the transition plate 3294 of its upper and lower surface, is positioned at Can be connected by laser welding between the transition plate 3294 of ceramic member 3296 upper surface and cover plate 3102, be positioned at ceramic member 3296 Can be connected by laser welding between the transition plate 3294 of lower surface with interior leading-out piece 3299.
In the present embodiment, current interrupt device 3200 has electric-conductor 3201 and is connected with phase with this electric-conductor 3201 The flip piece 3202 of electrical connection, and flip piece 3202 mutually can disconnect under gas pressure with electric-conductor 3201 and electrically connecting, its Middle electric-conductor 3201 is connected on interior leading-out piece 3299 and is formed with the gas port 3203 with enclosure gas communication, specifically Ground, electric-conductor 3201 embeds in the support slot being connected to interior leading-out piece, and the air passing hole formed in such support slot can be with inducing QI Hole 3203 gas communication, so that flip piece 3202 can experience the internal gas pressure of shell, thus in air pressure inside Effect is lower and disconnects flip piece 3202 and the electrical connection of electric-conductor 3201.Wherein, the outer peripheral edge of flip piece 3202 and adaptor The outer peripheral edge of 3298 is connected to set up electric current access path.
Wherein, in the present embodiment, as a kind of mode disconnecting electrical connection, electric-conductor 3201 is 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 drawn Break thus disconnect the electrical connection with flip piece.In other embodiments, indentation can also be formed on flip piece or use Break the mode of 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 by absolutely Edge part 3295 supports and is connected on electric-conductor 3201 and/or interior leading-out piece 3299, thus is realized upset by insulating part 3295 The assembling of part 3202, so ensure that outer peripheral edge and interior leading-out piece 3299 and the electric-conductor insulation of flip piece, thus avoids not Have after electrically connecting with electric-conductor disconnection under flip piece is at gas pressure and also can be electrically connected with electric-conductor or interior leading-out piece in outer peripheral edge Connect.
Specifically, insulating part can be the ring-type insulating part such as ceramic ring, sealing ring, and wherein insulating part has three kinds of connection sides Formula, first is supported on electric-conductor 3201 for sealing, is in particular supported on electric-conductor 3201 around being pulled off the region in region, Second for being supported on interior leading-out piece 3299, is in particular 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, and the most as shown in figure 23, insulating part is supported on interior leading-out piece 3299 and electric-conductor 3201 join domain on.
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 power current of big electric current Pond, similar with the first embodiment, in the case of electric-conductor arranges indentation 3205, as shown in figure 23, flip piece 3202 with lead Electricity part 3201 by by indentation 3205 around boss Welding Structure be connected, this boss Welding Structure include boss 3203, receiving The connecting hole 3204 of this boss 3203 and the annular solder joint 3217 between this boss 3203 and connecting hole 3204, thus protect Demonstrate,prove 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 are formed on flip piece 3202, and connecting hole 3204 is formed on electric-conductor 3201.In addition it is also possible to the first embodiment party Formula is identical, and boss is formed on electric-conductor 3201, and connecting hole 3204 is formed on flip piece.
It addition, as shown in figure 22, as a kind of embodiment, electric-conductor 3201 can be formed as cap-like structure, and this hat shape is tied 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 draws with interior Going out part to be connected, and cap body is protruded towards flip piece, flip piece is formed as laminated structure, and the outer peripheral edge of this laminated structure with Connect between the brim of a hat and have above-mentioned insulating part 3295.So that the compact conformation of the current interrupt device of present invention offer, assembling Stable.
In the present embodiment, in order to set up current loop with the external world, it is preferable that electrode terminal 3101 includes through cover plate Pole 3104, this pole is connected by the insulation of ceramic ring 3293 and cover plate, thus avoids cover plate charged, additionally adaptor 3298 It 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 are sealedly connected on the outer surface of cover plate, and are connected with pole 3104 sealing, to ensure the sealing effectiveness within cover plate.Its In, axially through being formed with pore 3292 on pole.So, the mistake of the electrical connection interrupted at current interrupt device 3200 pressurized Journey will not be affected by closed chamber air pressure in cover plate but pressure reduction can be set up with ambient atmosphere so that overturn Part 3202 under the effect of inside and outside differential pressure action and break indentation 3205.
Above describe the cell that four embodiment of the invention provides.Introduce the present invention below in conjunction with Figure 24 to provide The 5th embodiment.
5th embodiment of the present invention provides a kind of cell 4100 and uses the battery modules of this cell, Wherein this cell 4100 include shell, accommodate electrode terminal 4101 that battery core in the enclosure electrically connects with this battery core with And the cover plate 4102 of package casing, electrode terminal 4101 is arranged on cover plate 4102, and wherein, electrode terminal includes through cover plate 4102 and the pole 4104 that electrically connected by interior leading-out piece 4196 with battery core, cell also includes being arranged on pole 4104 Current interrupt device 4200, this current interrupt device 4200 has fixing relative to cover plate 4102 and with shell internal gas and connects Logical flip piece 4202, and flip piece 4202 is connected by junction point with the outer face of pole 4104, this junction point can be Disconnect under gas pressure.So, in present embodiment, the operation principle of current interrupt device is directly will be overturn by air pressure The junction point of part 4202 and pole 4104 pulls open, 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.Such as pass through a little The solder joint 4199 being soldered, additionally can be realized by other welding means such as Laser Welding.Therefore, permissible in present embodiment Reasonably implement by the fusion penetration of butt welding point, molten width, thus realize the control breaking pressure.
In the present embodiment, it is similar to the first embodiment, pole 4104 is formed with what the inside with shell connected Gas port 4103, such that it is able to be directed to air pressure inside in current interrupt device easily.It addition, in order to promote electricity further Stream interrupts the reliability of device, it is preferable that being formed with indentation 4205 on flip piece 4202, this indentation 4205 sets around junction point Put.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.This embodiment party In formula, the air pressure of breaking of junction point and indentation has a successively property, and specifically, junction point can the first gas pressure in the enclosure Under break, indentation 4205 can be broken under the effect of the second air pressure, the second air pressure be 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 on flip piece 4202 4210, this block 4210 is formed with pore 4197.So, after indentation 4205 is pulled off, the gas of enclosure can pass through Being discharged from pore 4197 by flip piece again, then realize the pressure release of inside battery, prevent inside battery from exploding, this is former Manage 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 by pottery Porcelain structure realizes the stable installation of pole and avoids cover plate 4102 charged simultaneously.It addition, pole 4104 and the periphery of flip piece Seal between edge and be connected to the second ceramic ring 4198 repeatedly, such that it is able to realized the close of the outer peripheral edge of flip piece by this ceramic structure Envelope, it is ensured that flip piece can effectively be pressed by interior gas, and ensure to insulate between pole and the outer peripheral edge of flip piece, keep away. simultaneously Exempt from the flip piece after breaking junction point or indentation and remain able to conduction.
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, and the radial outside of annular boss 4297 seals support the second pottery Ring 4198, this second ceramic ring 4198 seals the outer peripheral edge supporting flip piece 4202.Overall current is made to interrupt the structure of device Compacter, and assemble stable.For the ease of assembling, the first ceramic ring 4207 is sealedly connected on cover plate by transition rings 4209 On 4102.Specifically can carry out Ceramic brazing by transition rings with the first ceramic ring 4207 and be tightly connected.
Above describe the present invention first to the 5th embodiment, below, introduce a kind of present invention in conjunction with Figure 20 and Figure 21 The cell provided and the embodiment of battery modules, wherein the effect with said structure embodiment same characteristic features is not done at this Too much repeat.
In the present embodiment, it is provided that a kind of cell, this cell 100 includes shell 109, is contained in shell 109 In the electrode terminal 101 that electrically connects with this battery core 108 of battery core 108 and the cover plate 102 of package casing, electrode terminal 101 sets Putting on cover plate 102, electrode terminal includes that, through cover plate 102 pole 104 that electrically connects with battery core, cell also includes peace The current interrupt device 200 being contained on pole 104, this current interrupt device 200 connects with the internal gas of shell, wherein electric current Interrupt device 200 there is electric-conductor 201 and be 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 to electrically connect, and wherein electric-conductor 201 is connected on pole 104 with mutually electricity Connecting, flip piece 202 is connected by boss Welding Structure with electric-conductor 201, and this boss Welding Structure includes boss 203, accommodates 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 shape Becoming the first laminated structure, this first laminated structure is formed connecting hole 204, electric-conductor 201 is formed as the second laminated structure, Being formed with boss 203 in this second laminated structure, electric-conductor 201 is formed indentation 205, this indentation 205 sets around boss 203 Putting, 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 and cover plate 102 is fixing to be connected, and is formed on pole 104 and connects leading of enclosure and current interrupt device 200 Pore road, pole 104 is arranged on the ceramic ring 207 being sealedly attached on cover plate 102, and the outer face of ceramic ring 207 seals Connecting has conducting ring 216, the outer peripheral edge of flip piece 202 to be sealedly connected on this conducting ring 216, and pole 104 leads to conducting ring 216 Cross ceramic ring 207 to insulate.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 circular, and the center of circle of indentation 205 and boss 203 The center of circle stagger along the long axis direction of this ellipse, 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, and the inner edge of ceramic ring 207 has Supporting the radial direction support 208 connecting this radial direction boss 105, radially boss 105 is the multiple of circumferentially spaced setting, radially supports 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 Embedding is connected on inner ring, outer ring is sealedly connected with and the conducting ring 216 of pole insulation, and the outer peripheral edge of flip piece 202 is fixed Being connected on this conducting ring 216, the inner face of ceramic ring 207 is sealedly connected with transition rings 209, this transition rings 209 seals even It is 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 passes through pottery between conducting ring 216, pole 104 and transition rings 209 Sealed with brazing connects.
In the present embodiment, transition rings 209 has inner ring and the outer ring forming Z-type structure, and cover plate is formed for pole 104 The through hole passed, 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 supports 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, in battery core 108, connection has lower spacer ring 107, connect below cover plate 102 and have upper spacer ring 106, upper and lower spacer ring can use isolation material to make.Wherein, cell 100 is also Interior being connected sheet 110 including with battery core is connected, this interior connection sheet 110 extends between spacer ring 107 and lower spacer ring 106, for Transmission electric current, the lower surface of pole 104 is formed with end difference, and this connects end difference through cover plate 102 and upper spacer ring 106 and interior company The end clamping of contact pin 110.Thus complete electric current from battery core 108 to the transmission of pole 104 and make cover plate 102 and shell 109 are insulated, it is to avoid charged.
In the battery modules that the present embodiment provides, this battery modules includes multiple cell, at least one monomer electricity Pond is above-mentioned cell, and current interrupt device 200 extends radially out cover plate 102, adjacent cell 100 it Between, current interrupt device 200 mutually staggers with adjacent electrode terminal on the bearing of trend of cover plate.It addition, at adjacent list Between body battery 100, being connected by L-type connector 214 between current interrupt device 200 and adjacent electrode terminal, this L-type is even Fitting 214 has covering part 211 and lead division 212, and covering part 211 covers and is connected in current interrupt device 200, lead division 212 extend to adjacent electrode terminal.
Additionally, the present embodiment also provides for a kind of electrokinetic cell, it is characterised in that this electrokinetic cell includes inclusion and is contained in Battery modules in this inclusion, battery modules is above-mentioned battery modules, and is provided with in inclusion for detecting fuel gas Gas-detecting device, this gas-detecting device adjacent currents interrupt device arrange, for for charge and discharge protecting system provide Fuel gas signal.Furthermore, it is contemplated that cost and effect, this battery modules has a current interrupt device.
Above describe the cell with current interrupt device or explosion-proof valve, current interrupt device therein or explosion-proof Valve is all the safety measure realized by the frame for movement of itself.The present invention will be described in detail and includes charge and discharge protecting system below Electrokinetic cell, to promote safety by automatically controlled mode.
As shown in figure 19, the present invention provides a kind of electrokinetic cell, and this electrokinetic cell can be above-mentioned to have current interruptions dress Put, explosion-proof valve or other kinds of electrokinetic cell.Wherein, electrokinetic cell includes inclusion and the multiple monomers being contained in this inclusion Battery 100, the most the plurality of cell 100 is the most in a series arrangement or parallel way forms battery modules, wherein said bag The gas-detecting device 300 of the internal fuel gas being provided with in detecting electrokinetic cell, such as gas sensor, thus be The charge-discharge circuit whether cutting off electrokinetic cell provides signal.
Wherein, the charge and discharge protecting system that this electrokinetic cell includes is except including the above-mentioned gas detecting being positioned at electrokinetic cell Outside device 300, also include 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 is used for Control current channel device according to fuel gas signal and cut off the charge-discharge circuit of electrokinetic cell.That is, in the present invention safety Property be by whether there is fuel gas and automatically controlling of carrying out in detection inclusion.Wherein, in danger such as battery overcharge State is, inside can produce fuel gas, and this portion gas can be leaked in inclusion by various modes, now more or less Gas-detecting device, the most airtight sensor is able to detect that fuel gas, and feeds back to control device, controls device according to being The no fuel gas detected or the amount of fuel gas detected decide 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, can cut off dynamic with control circuit lane device The charge-discharge circuit of power battery, 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 it is hidden to reduce safety Suffer from.
As shown in figure 19, control device 400 include the host computer main control chip 401 of electrokinetic cell and believe with this main control chip Number connect control module 402, 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, 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, the collection signal for gas sensor can do digital-to-analogue conversion, Sampling hold etc. Process, it can in addition contain carry out the breakdown judge of system, when system does not break down, can will gather signal further Carry out the process of gas concentration thus judge whether there occurs the leakage of fuel gas, when the leakage concentration that fuel gas occurs surpasses When crossing 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, and fuel gas can be by upper Indentation in the current interrupt device stated or explosion-proof valve releases after being pulled off, as long as can release gas in addition, can also lead to Cross and 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 sets It is equipped with the current interrupt device cutting off charge-discharge circuit under cell internal gas pressure effect, in the most aforesaid each electric current Disconnected device.And current interrupt device can make the gas in shell to leak in the switched off state.So that inclusion Interior gas-detecting device is able to detect that the fuel gas leaked, and now represents that battery has occurred in that dangerous feelings such as overcharging Condition.Additionally, for the sensitivity promoting system, it is preferable that gas-detecting device adjacent currents is interrupted device and arranged, thus can Corresponding signal can be detected in time and feed back to control device after the release of combustion gas body.It addition, in addition to current interrupt device, one In a little embodiments, at least one cell is provided with release under described cell internal gas pressure effect The explosion-proof valve of gas, such as the explosion-proof valve in the 3rd embodiment, now, gas-detecting device can set by neighbouring described explosion-proof valve Put.
In the present embodiment, in order to realize above-mentioned gas leak, the current interrupt device in the respective embodiments described above There is covering, this covering is formed with pore 213 so that the gas in described shell can be at flip piece and electric-conductor Leak after disconnecting 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 Connector 1210 in two embodiments, or be the protecting film 2099 etc. in the 3rd embodiment.It is thus possible to accordingly Indentation be pulled off after so that gas can be released by the pore 213 in the such as first embodiment, thus is examined by gas Survey device and detect the fuel gas leaking in bag in time.
The present invention further provides a kind of electric automobile, this electric automobile is provided with the electrokinetic cell that the application proposes.
It is preferably located on the end of battery modules and/or the cell of central part and is provided with and described electrode tip During the current interrupt device that son 101 electrically connects, the electrokinetic cell comprising this battery modules is preferably located in electric automobile close The position of electromotor；It is provided with and described electrode tip it is further preferred that be positioned on the cell of the end of battery modules During the current interrupt device that son 101 electrically connects, the electrokinetic cell comprising this battery modules is preferably located in electric automobile close The position of electromotor；Now battery modules is affected by engine environment hot environment, the cell of the end of battery modules Temperature more than the temperature of cell at other positions of battery modules, therefore, when the abnormality of the battery occurs, the end of battery modules The temperature of the cell in portion is more than the temperature of the cell at other positions of battery modules, the end of corresponding battery modules The air pressure within cell more than the air pressure within cell at other positions of battery modules, this kind of situation is arranged on electricity Current interrupt device on the cell of the end of pond module is preferentially activated, and forms open circuit protection, cell safety reliability Higher.
Five kinds of embodiments of the present invention are described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this The thought of invention, it should be considered as content disclosed in this invention equally.
Finally, the Developed Background introducing foregoing invention of the present invention design is described:
Along with increasingly sharpening of environmental pollution, the exploitation of new-energy automobile has become national new strategical planning, and new forms of energy Mixed dynamic or pure electric automobile in automobile occupies the main flow in current automobile market, in electric automobile field, and course continuation mileage mesh Before be the principal element of restriction development, and this depends on the energy density of battery core, and the main core material of existing market is ternary With 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 safety to ternary material Can need 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) come in module Battery core carry out voltage and current temperature management and control, but actually used during, the concordance of battery core and the reliability of management software Still there is the most accidental risk.Specifically, reference people are for the use habit of mobile device, for electric automobile, popular Typically also can there is the situation about always charging that plugged in by car body, although have BMS software to be controlled, when single this battery is long Between charge, if software detection lost efficacy or other abnormal arise that the risk that in inclusion loop, battery core overcharges.Therefore, the present invention Inventor expects can being a kind of mechanical design protection of battery design, with the battery security caused after avoiding software failure Risk.
For mechanical protective measure, the present inventor creatively finds, battery such as is overcharging at the precarious position Under current interruptions opportunity be regular governed in fact, i.e. the air pressure inside when the precarious position such as overcharging and occurring can be utilized The principle risen, designs current interrupt device or the explosion-proof valve of the electric current that can interrupt electrode terminal such that it is able to control electricity The input of extreme son or output, to ensure safety.
Further, since the electrokinetic cell capacity used on automobile is generally tens times of 3C battery class, and pass through electric current Dozens or even hundreds of times of baby battery class especially, thus also require this sheet have to by the biggest electric current, and due to Using the reason of environment, its weatherability and sealing requirements are more strict, and these problems just define this after collecting Technical scheme in bright each above-mentioned embodiment.And by verification experimental verification, in the electric current in each embodiment of the present invention Disconnected device or explosion-proof valve all can disconnect the electric current of battery in time, thus effectively promote safety.

Claims (16)

1. a battery modules, the cell (100) being arranged in order including n, described cell (100) include shell, Accommodate the electrode terminal (101) that battery core in the enclosure electrically connects and the cover plate (102) encapsulating described shell with this battery core, Described electrode terminal (101) is arranged on described cover plate (102), it is characterised in that be positioned at end and/or the central authorities of battery modules The current interrupt device (200) electrically connected with described electrode terminal (101) it is provided with, in described electric current on the cell at position Disconnected device (200) connects with the internal gas of described shell and flows through described cell can disconnect under gas pressure (100) electric current；
The cell of the end of described battery modules is the 1st cell and/or the n-th of battery modules of battery modules Cell；When n is odd number, the cell of the central part of described battery modules is the (n+1)th/2 list of battery modules Body battery；When n is even number, the cell of the central part of described battery modules is the n-th/2 monomer electricity of battery modules Pond and/or the n-th+2/2 cell；Wherein n >=3.
Battery modules the most according to claim 1, it is characterised in that be positioned at end and the central part of described battery modules Cell on be provided with the current interrupt device (200) electrically connected with described electrode terminal (101), described current interruptions fills Put (200) to connect with the internal gas of described shell under gas pressure, to disconnect the electric current of described cell (100)；
The cell of the end of described battery modules is the 1st cell and n-th list of battery modules of battery modules Body battery；When n is odd number, the cell of the central part of described battery modules is the (n+1)th/2 monomer of battery modules Battery；When n is even number, the cell of the central part of described battery modules is the n-th/2 cell of battery modules Or the n-th+2/2 cell；Wherein n >=3.
Battery modules the most according to claim 2, it is characterised in that be provided with the list of described current interrupt device (200) The quantity of body battery is three.
Battery modules the most according to claim 2, it is characterised in that described current interrupt device is relative to described cover plate (102) fixing.
Battery modules the most according to claim 2, it is characterised in that described current interrupt device (200) radially extends Go out described cover plate (102).
6. according to the battery modules described in claim 1-5 any one, it is characterised in that described current interrupt device (200) There is electric-conductor (201) and be 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.
Battery modules the most according to claim 6, it is characterised in that described electric-conductor is formed with indentation on (201) (205), this indentation (205) is arranged around the junction point being used for connecting described flip piece (202).
Battery modules the most according to claim 6, it is characterised in that described electrode terminal (101) includes through described lid Plate the pole (104) electrically connected with described battery core, described current interrupt device is arranged on described pole (104), Qi Zhongsuo Stating electric-conductor (201) to be connected on the outer end end face of described pole (104) to be electrically connected to each other, described pole (104) is with described Cover plate (102) is fixing to be connected, and is formed with the described enclosure of connection and described current interrupt device on described pole (104) (200) inducing QI duct.
Battery modules the most according to claim 6, it is characterised in that described current interrupt device is arranged on described cover plate On, wherein said electric-conductor has the body being connected with described flip piece and extends to described electrode terminal also from this body The connecting portion being connected with this electrode terminal, described body and described enclosure gas communication.
Battery modules described in-9 any one the most according to Claim 8, it is characterised in that at adjacent described cell (100) between, described current interrupt device (200) on the bearing of trend of short transverse and/or described cover plate with adjacent electricity Extreme son mutually staggers.
11. battery modules described in-9 any one according to Claim 8, it is characterised in that at adjacent described cell (100), between, described current interrupt device (200) is the most wrong with adjacent electrode terminal on the bearing of trend of described cover plate Open, and connected by L-type connector (214) between described current interrupt device (200) with described adjacent electrode terminal.
12. battery modules according to claim 11, it is characterised 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), described extraction Portion (212) extends to described adjacent electrode terminal.
13. battery modules according to claim 10, it is characterised 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 electric current Interrupt device (200) and include the block (210) that covers described flip piece, this block (210) along described cover plate (102) extend to Described adjacent electrode terminal alignment, and be connected by electrode terminal adjacent with this for I type connector (215).
14. 1 kinds of electrokinetic cells, including inclusion and the battery modules being arranged in this inclusion, it is characterised in that described battery mould Group is for according to the battery modules described in claim 1-13 any one.
15. 1 kinds of electric automobiles, it is characterised in that this electric automobile be provided with according to claim 14 electrokinetic cell.
16. electric automobiles according to claim 15, it is characterised in that described electrokinetic cell is located close to electric automobile The position of electromotor.
CN201620140683.5U 2016-02-25 2016-02-25 Battery module, power battery who contains this battery module and electric automobile Active CN205621793U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201620140683.5U CN205621793U (en) 2016-02-25 2016-02-25 Battery module, power battery who contains this battery module and electric automobile
PCT/CN2016/097401 WO2017143749A1 (en) 2016-02-25 2016-08-30 Single-cell battery, battery module, power battery, and electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620140683.5U CN205621793U (en) 2016-02-25 2016-02-25 Battery module, power battery who contains this battery module and electric automobile

Publications (1)

Publication Number Publication Date
CN205621793U true CN205621793U (en) 2016-10-05

Family

ID=57033576

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620140683.5U Active CN205621793U (en) 2016-02-25 2016-02-25 Battery module, power battery who contains this battery module and electric automobile

Country Status (1)

Country Link
CN (1) CN205621793U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108039527A (en) * 2018-01-08 2018-05-15 华霆（合肥）动力技术有限公司 Electric commercial vehicle battery component and battery system
WO2019114774A1 (en) * 2017-12-13 2019-06-20 比亚迪股份有限公司 Battery system and electric vehicle
US11183729B2 (en) 2019-01-09 2021-11-23 Byd Company Limited Battery pack, vehicle and energy storage device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019114774A1 (en) * 2017-12-13 2019-06-20 比亚迪股份有限公司 Battery system and electric vehicle
CN109920964A (en) * 2017-12-13 2019-06-21 比亚迪股份有限公司 Battery system and electric car
CN108039527A (en) * 2018-01-08 2018-05-15 华霆（合肥）动力技术有限公司 Electric commercial vehicle battery component and battery system
US11183729B2 (en) 2019-01-09 2021-11-23 Byd Company Limited Battery pack, vehicle and energy storage device
US11955651B2 (en) 2019-01-09 2024-04-09 Byd Company Limited Power battery pack and electric vehicle

Similar Documents

Publication Publication Date Title
CN206210970U (en) Electrokinetic cell and its protection system and electric automobile
CN205564868U (en) Battery cell , battery module, power battery and electric automobile
CN205488328U (en) Battery cell , battery module, power battery and electric automobile
CN205790098U (en) Current interrupt device, cell, battery modules, electrokinetic cell and electric automobile
CN107123774B (en) Single battery, battery modules, power battery and electric car
CN107123778A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123776A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123768A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123769B (en) Single battery, battery modules, battery pack and electric car
CN205621794U (en) Battery cell , battery module, power battery and electric automobile
WO2017143752A1 (en) Single-cell battery, battery module, power battery, and electric vehicle
CN205621793U (en) Battery module, power battery who contains this battery module and electric automobile
CN107123777A (en) Cell, electrokinetic cell and electric automobile
CN205645976U (en) Battery cell , battery module, power battery and electric automobile
CN205645975U (en) Battery cell , battery module, power battery and electric automobile
WO2017143749A1 (en) Single-cell battery, battery module, power battery, and electric automobile
CN205657138U (en) Current interruption device , battery cell , battery module, power battery and electric automobile
CN107123775A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123782A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123784A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123780A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123779A (en) Cell, battery modules, electrokinetic cell and electric automobile
CN107123783A (en) Cell, battery modules, electrokinetic cell and electric automobile
WO2017143750A1 (en) Single-cell battery, battery module, power battery, and electric vehicle
CN107123781A (en) Battery modules, electrokinetic cell and electric automobile

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant