CN107123781A - Battery modules, electrokinetic cell and electric automobile - Google Patents

Battery modules, electrokinetic cell and electric automobile Download PDF

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Publication number
CN107123781A
CN107123781A CN201610105607.5A CN201610105607A CN107123781A CN 107123781 A CN107123781 A CN 107123781A CN 201610105607 A CN201610105607 A CN 201610105607A CN 107123781 A CN107123781 A CN 107123781A
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CN
China
Prior art keywords
cell
electric
battery modules
cover plate
interrupt device
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Granted
Application number
CN201610105607.5A
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Chinese (zh)
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CN107123781B (en
Inventor
公绪斌
周燕飞
许杏
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN201610105607.5A priority Critical patent/CN107123781B/en
Publication of CN107123781A publication Critical patent/CN107123781A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/445—Methods for charging or discharging in response to gas pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a kind of battery modules, electrokinetic cell and electric automobile.The battery modules include multiple cells, the cell includes shell, it is contained in the battery core in shell, the electrode terminal and the cover plate of the encapsulation shell electrically connected with the battery core, the electrode terminal is arranged on the cover plate, at least one cell includes the current interrupt device electrically connected with the electrode terminal, the current interrupt device connects that the electric current flowed through can be disconnected under gas pressure with the internal gas of the shell, wherein, between neighboring unit cell, the width for being provided with the cell of the current interrupt device is more than the width for the cell for being not provided with current interrupt device, and the current interrupt device is radially close to the both sides of the edge extension on the width of the cover plate.

Description

Battery modules, electrokinetic cell and electric automobile
Technical field
The present invention relates to field of batteries, in particular it relates to a kind of battery modules, including the battery modules Electrokinetic cell and the electric automobile including the electrokinetic cell..
Background technology
Battery is played an important role as energy-storage units in all trades and professions, and for example electrokinetic cell is widely used in newly Can have in the battery bag in the fields such as energy automobile, wherein electrokinetic cell and mutually be gone here and there by multiple cells Connection and is unified into battery modules to realize the work of discharge and recharge.Wherein, electrokinetic cell is in charge and discharge process, Charging state is generally calculated by the change of BMS (battery management system) monitoring voltages and electric current.If Voltage sample goes wrong, it is possible to cause over-charging of battery, for ternary system, such as mistake Fill the danger for reaching and cells burst blast more occurring to a certain degree.
Existing technical scheme：Monitoring to the voltage and current of battery, passes through Current integrating method and open circuit Voltage method calculates battery electric quantity, and controls the charge and discharge of battery to manage with this.But there is also deficiency, for example Either current sample fails or software failure battery voltage sampling, causes battery to charge not for a long time To control, particularly in the case where charging pile charges, when charging pile is with battery manager communication failures, Overcharge it is uncontrollable, over-charging of battery to a certain extent, can cause battery blow-up even it is on fire from explosion.
Therefore it provides a kind of current interruptions technology that itself can force to disconnect has positive effect.
The content of the invention
It is an object of the invention to provide a kind of battery modules, the battery modules are rationally distributed and can be in danger When force disconnecting circuit so as to avoid battery explosion etc. danger generation.
The present invention also aims to provide it is a kind of using this using the battery modules electrokinetic cell and make With the electric automobile of the electrokinetic cell.
To achieve these goals, the present invention provides a kind of battery modules, including multiple cells, should Cell include shell, the battery core being contained in shell, the electrode terminal that is electrically connected with the battery core and The cover plate of the shell is encapsulated, the electrode terminal is arranged on the cover plate, at least one cell Including the current interrupt device electrically connected with the electrode terminal, the current interrupt device and the shell Internal gas connects that the electric current flowed through can be disconnected under gas pressure, wherein, in neighboring unit cell Between, be provided with the current interrupt device cell width be more than be not provided with current interrupt device Cell width, and the current interrupt device is radially close to the width of the cover plate On both sides of the edge extension.
Preferably, in adjacent cell, adjacent electrode terminal is on the bearing of trend of the cover plate It is mutually aligned.
Preferably, between the adjacent cell, the current interrupt device and adjacent electrode Terminal is connected by I types connector.
Preferably, the quantity for being provided with the cell of the current interrupt device is no more than three.
Preferably, the battery core capacity being provided with the cell of the current interrupt device is with being not provided with institute The battery core capacity stated in the cell of current interrupt device is identical.
Preferably, in the cell for being provided with the current interrupt device, filled out around the battery core Filled with dividing plate.
Preferably, the ratio between the battery core and the volume of the dividing plate are 1：1-2：1.
Preferably, the current interrupt device has electric-conductor and is connected to be electrically connected to each other with the electric-conductor Flip piece, and the flip piece can disconnect under gas pressure with the electric-conductor and electrically connect.
Preferably, indentation is formed with the electric-conductor, the indentation, which is surrounded, to be used to connect the flip piece Tie point is set.
Preferably, the flip piece is connected with the electric-conductor by boss welding structure, boss welding Structure includes boss, accommodates the connecting hole and the annular welds between the boss and connecting hole of the boss Point.
Preferably, the flip piece is formed as the first laminated structure, and first laminated structure is formed with described Connecting hole, the electric-conductor is formed as the second laminated structure, is formed with second laminated structure described convex Platform.
Preferably, the indentation is ellipse, and the tie point is rounded connecting point, and the indentation The center of circle and the center of circle of the tie point stagger along the oval long axis direction.
Preferably, the flip piece is coaxially disposed with the electrode terminal, and the electric-conductor is relative to described The axis of electrode terminal is obliquely installed.
Preferably, the electric-conductor is connected on the outer end end face of the pole, the periphery of the flip piece Edge is fixed relative to the cover plate.
Preferably, it is sealedly connected with ceramic ring between the outer peripheral edge of the flip piece and the cover plate.
The present invention also provides a kind of electrokinetic cell, including inclusion and the battery modules being arranged in the inclusion, Characterized in that, the battery modules provide battery modules for the present invention.
The present invention also provides a kind of electric automobile, and the electric automobile is provided with the power electric that the present invention is provided Pond.
By above-mentioned technical proposal, when battery occurs dangerous, gas can be produced in battery, therefore with The rise of air pressure, current interrupt device can battery under gas pressure charge-discharge circuit, then avoid Battery air-pressure continues to increase and explode.And battery modules are rationally distributed, current interrupt device can be caused Stress is bigger and lifts sensitivity.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with Following embodiment is used to explain the present invention together, but is not construed as limiting the invention. In accompanying drawing：
Fig. 1 is the decomposed schematic perspective view of electrokinetic cell in first embodiment of the invention；
Fig. 2 is the overlooking the structure diagram of two neighboring cell in first embodiment of the invention；
Fig. 3 is the cross section structure diagram from the line A-A interceptions in Fig. 2；
Fig. 4 is the decomposition texture schematic diagram of current interrupt device in first embodiment of the invention；
Fig. 5 is the decomposition texture schematic diagram of flip piece and electric-conductor in first embodiment of the invention；
Fig. 6 is that the sectional structure in first embodiment of the invention under flip piece and electric-conductor confined state shows It is intended to；
Fig. 7 is the overlooking the structure diagram of electric-conductor in first embodiment of the invention；
Fig. 8 is the cross section structure diagram of another embodiment of pole during the present invention first is implemented；
Fig. 9 is the dimensional structure diagram of another embodiment of pole in first embodiment of the invention；
Figure 10 is that pole and the sectional structure of another embodiment of ceramic ring show in first embodiment of the invention It is intended to；
Figure 11 is that pole and the stereochemical structure of another embodiment of ceramic ring are shown in first embodiment of the invention It is intended to；
Figure 12 is that the structure of two neighboring another embodiment of cell in first embodiment of the invention is shown It is intended to；
Figure 13 is the dimensional structure diagram of electrokinetic cell in second embodiment of the invention；
Figure 14 is the dimensional structure diagram of cell in second embodiment of the invention；
Figure 15 is the exploded perspective structural representation of cell in second embodiment of the invention；
Figure 16 is the exploded perspective structural representation of flip piece and electric-conductor in second embodiment of the invention；
Figure 17 is the broken section structural representation of cell in second embodiment of the invention；
Figure 18 is the broken section structural representation of cell in third embodiment of the invention；
Figure 19 is the theory diagram for the control system that the preferred embodiment for the present invention is provided；
Figure 20 is the decomposition texture schematic diagram of the cell of an embodiment of the present invention；
Figure 21 is the broken section structural representation after the cell assembling in Figure 20；
Figure 22 is the broken section structural representation of cell in four embodiment of the invention；
Figure 23 is the structural representation of current interrupt device in four embodiment of the invention；
Figure 24 is the broken section structural representation of cell in fifth embodiment of the invention.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that Embodiment described herein is merely to illustrate and explain the present invention, and is not limited to this hair It is bright.
In the present invention, in the case where not making opposite explanation, the noun of locality used as " it is upper and lower, left, It is right " it is typically what is defined on the basis of the page of respective drawings, " inside and outside " refers to corresponding component Profile it is inner and outer.
As shown in Fig. 1 to Figure 24, the invention provides current interrupt device, cell, battery mould The technical scheme of group, electrokinetic cell and electric automobile.Wherein current interrupt device is set in single cells, Multiple cells are by serial or parallel connection into battery modules, it is possible to insert in battery bag and form power Battery.In addition, in addition to electrokinetic cell field, the various technical schemes provided in the present invention can also be extensive Applied in other field of batteries.Specifically, the present invention passes through the first to the 5th embodiment place of matchmakers Be related to cell 100,1100,2100,3100,4100, be directed to current interrupt device 200, 1200th, 3200,4200 and explosion-proof valve 2200, it the invention additionally relates to a kind of there is electrokinetic cell Charge and discharge protecting system.Each embodiment is described in detail below in conjunction with accompanying drawing.
First, as shown in Fig. 1 to Figure 24, a kind of battery modules are provided which in each embodiment of the invention, Including multiple cells 100,1100,2100,3100,4100, wherein, cell can be wrapped Include shell, the battery core being contained in shell, the electrode terminal 101 electrically connected with the battery core, 1101,2101, 3101st, 4101 and package casing cover plate 102,1102,2102,3102,4102, wherein electrode Terminal is set on the cover board, for completing the input and output of electric current.Wherein, include in cell Current interrupt device 200,1200,3200,4200 or explosion-proof valve 2200, the current interrupt device or Person's explosion-proof valve is electrically connected with electrode terminal, therefore by the effect of current interrupt device, can be with coordination electrode The input and output of the electric current of terminal.That is current interrupt device or explosion-proof valve conventional shape in single cells It is the state that battery core is turned under state, now electrode terminal can be normally carried out the input and output of electric current, with The charge/discharge operation of cell is completed, and under precarious position, such as when battery is overcharged, electric current Interruption means or explosion-proof valve can interrupt the electric current input and electric current output of electrode terminal, so as to avoid electricity The problems such as pond is overcharged.Therefore, as important safety measure, the reliability of current interrupt device is extremely Close important, that is, need current interrupt device can be with quick response.In 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 To be directly anchored on cover plate, can also be fixed on arbitrarily be connected with cover plate or with the relatively-stationary portion of cover plate On part, such as on the electrode terminal in setting and cover plate.
In the present invention, the current interrupt device or explosion-proof valve in each embodiment are the machine of induction air pressure Tool structure, specifically, the enclosure gas connection of current interrupt device and cell simultaneously can be in gas Pressure effect disconnects the electric current flowed through.It can specifically be connected by the part of breaking inner come interruptive current Transmission so that in time cut off battery discharge and recharge.The air pressure source wherein utilized is：When for example electric When pond is overcharged etc. during precarious position, inside battery can produce the air pressure that gas then causes enclosure Rise, or cause battery temperature to raise when exception occurs in use in battery and cause inside battery Air pressure is raised, so as to produce the Pneumatic pressure power of driving current interruption means or explosion-proof valve.
By taking such as Fig. 1 to Figure 12 first embodiment as an example, the current interrupt device has electric-conductor 201 It is connected with the electric-conductor 201 with the flip piece 202 being electrically connected to each other, and flip piece 202 and conduction Part 201 can disconnect electrical connection under gas pressure, wherein in the different embodiments in the present invention, breaking The mode for opening electrical connection can be different, wherein can be disconnected for the tie point between electric-conductor and flip piece, For example solder joint therebetween is pulled to realize the disconnection of electrical connection, alternatively, it is also possible to in the two extremely Few one itself disconnects, for example, realized and itself tied by processing the indentation of weakness on corresponding component The disconnection of structure, so as to realize the disconnection of electrical connection.That is, realize in the present invention and disconnect machine under gas pressure Tool structure cuts off the purpose of the transmission of electric current.
So, by taking first embodiment as an example, when for example battery is overcharged, inside battery can be produced Then air pressure is raised gas, and now under certain gas pressure, flip piece 202 is by rotary movement Disconnect and electrically connecting with electric-conductor 201, so as to interrupt electrode terminal 101 and extraneous circuit, stop battery Charging so that avoid inside battery air pressure continue raise, it is ensured that the safety of battery.
In the present embodiment, electrode terminal 101 includes the pole 104 electrically connected with battery core, for example, lead to Interior leading-out piece is crossed with battery core to be connected, wherein pole 104 from cover plate 102 pass through with by electric current from shell Draw.Wherein, in the present embodiment, current interrupt device 200 can be arranged on pole 104. The air pressure of inside battery so can be directly experienced by pole 104, sensitivity is high, can avoid in addition Separately current interrupt device 200 and electrode terminal are attached, convenient processing.
Wherein, due in the field of such as electrokinetic cell, it is necessary to which the electric current passed through is larger, it is therefore desirable to Ensure that the welding structure of electric-conductor 201 and flip piece 202 is stable, it is to avoid high current fusing welding structure. So, in the present embodiment, as shown in Figure 5 and Figure 6, flip piece 202 passes through with electric-conductor 201 Boss welding structure is connected, and the boss welding structure includes boss 203, accommodates the connection of the boss 203 Hole 204 and the annular solder joint 217 between the boss 203 and connecting hole 204.That is boss 203 It is located at one of connecting hole 204 on flip piece 202, it is another to be located on electric-conductor 201.Therefore Ensure the firm welding of boss 203 that annular solder joint 217 can stably will be received in connecting hole 204, And the circulation area that can increase electric current ensures passing through for high current.Specifically, as a kind of embodiment, Boss 203 can be formed on electric-conductor 201, and connecting hole 204 can be formed on flip piece 202, More specifically, flip piece 202 is formed as the first laminated structure, connection is formed with first laminated structure Hole 204, electric-conductor 201 is formed as the second laminated structure, and boss 203 is formed with second laminated structure. In other embodiments, the two can be with transposition., can also be using sharp in addition in some modes Light penetrates the modes such as weldering and is welded flip piece 202 and electric-conductor 201.
Wherein, in the present embodiment, realize that the mode for disconnecting electrical connection can between flip piece and electric-conductor To be realized by indentation, i.e., the weak point that intensity is less than other regions is processed in appropriate section, wherein in order to Being fully disconnected for electric-conductor and flip piece is completed, indentation is usually the connection around electric-conductor and flip piece Point, such as above-mentioned welded loop configuration of boss.So as to pass through electric-conductor or flip piece in itself disconnected Come and realize the disconnection of electrical connection, wherein indentation can be formed can also form in electric-conductor on flip piece On, in the present embodiment, indentation 205 is formed with electric-conductor 201, the indentation 205, which is surrounded, to be used for The tie point of flip piece 202 is connected, i.e., the annular indentation around boss 203 is set in electric-conductor 201. So, when the air pressure inside of battery rises, the air pressure being subject to can promote indentation 205 to be pulled off, So that electric-conductor 201 can be departed from flip piece 202 by being scored 205 parts of electric-conductor 203 surrounded, So as to realize the disconnection of electric current.In other embodiments, indentation can also be formed on flip piece 202.
As shown in fig. 7, for the ease of breaking indentation 205, it is preferable that indentation 205 can be ellipse. So when by gas pressure, because the curvature of profile is different, the larger region of curvature is more easy to concentrate and answered Power and stress is larger, can so be torn first, so as to increase the sensitivity that indentation 205 is pulled off. Further, in the present embodiment, boss 203 for circle, and ellipse indentation 205 circle Stagger along the oval long axis direction in the center of circle of the heart and boss 203.Oval major axis can so be caused The region unbalance stress at two ends, consequently facilitating breaking indentation 205 from partial points, and then lifts indentation 205 Sensitivity.
Furthermore it is also possible to set electric-conductor flip piece 202 to be coaxially disposed with electrode terminal 101, electric-conductor 203 are obliquely installed relative to the axis of electrode terminal 101.So, the indentation of lower position can be caused It can be pulled off first, so as to increase the sensitivity that indentation 205 is pulled off.Further, when indentation 205 During for ellipse, the axis of the major axis and electric-conductor that can design ellipse is obliquely installed, when electric-conductor peace Axis when on pole 104 also with pole is tilted.Consequently facilitating the larger area of the curvature of major axis end Domain is torn first, so as to ensure that indentation 205 can normally be broken when needed, it is ensured that current interruptions The normal work of device 200.
In addition, in order to be further ensured that indentation 205 is pulled off, can also as shown in Figure 7 in, design exists Decrease hole 206 is offered on indentation 205.So that indentation 205 is easy to the quilt at the decrease hole 206 Break, the size and number in decrease hole 206 therein can be set according to actual conditions.Preferably, Weaken hole 206 to be multiple and be arranged at intervals along indentation 205.In addition to abated effect, when indentation is designed in When on electric-conductor 201, the decrease hole 206 is also used as air guide and is used so that so that inside battery Gas can by the decrease hole 206 by gas pressure on flip piece 202.
Wherein, when current interrupt device 200 is arranged on pole 104, electric-conductor 201 is connected to pole On the outer end end face of post 104, the outer peripheral edge of flip piece 202 is fixed relative to cover plate 102.So, exist Under gas pressure, using the outer peripheral edge of flip piece 202 as the strong point, the quarter on electric-conductor 201 is formed Trace 205 can be pulled off.In addition, in order that flip piece 202 can be by gas pressure, can be by The outer peripheral edge sealing of flip piece, is tightly connected on the cover board for example with welding manner, to cause internal gas Pressure can exert a force to flip piece and break indentation 205.Outer end, the inner wherein herein and in similar description It is to be defined along the axial direction of pole relative to shell, and relative to " inside and outside " of ring-shaped article, It is radially to be defined relative to the center of the ring-shaped article if outer peripheral edge.
In the case of fixation in order to ensure electric-conductor 201 and pole 104, indentation 205 thereon can also Enough it is pulled off, it is preferable that receiving hole 218, electric-conductor 201 are formed with the outer end end face of the pole 104 Outer peripheral edge be fixed on the inwall of the receiving hole.So, electric-conductor 201 can be entered by annular profile Row is stable to be fixed, and the region inside indentation 205 is not connected with pole 104 so as in external force, For example under the direct pressure effect of pulling force or gas of flip piece 202 it is pulled off.
In the present invention, the mode of current interrupt device 200 and inside battery gas connection has a variety of, In present embodiment, the air guide of connection enclosure and current interrupt device 200 is formed with pole 104 Duct.So as to directly apply air pressure to current interrupt device by the internal structure of pole 104.So that Structure is simpler.
Wherein, above-mentioned air guide duct includes two kinds of gas ports 103 in the present embodiment, wherein first Planting gas port 103 is used to connect above-mentioned receiving hole 218 and enclosure, i.e., directly to electric-conductor 201 Press and thrust indentation 205.That is, air guide duct includes being used to connect above-mentioned receiving hole 218 and shell Internal gas port 103.Second of gas port 103 is used to connect flip piece 202 and enclosure, from And pressed to flip piece and break indentation 205.Wherein in order that obtaining the stress improved efficiency of flip piece 202, The gas port 103 can be around the multiple of receiving hole.Therefore, in the common work of two kinds of gas ports 103 Under, the sensitivity of current interrupt device can be increased.
Wherein specifically, as shown in Figure 2 and Figure 8, pole 104 is fixedly connected with cover plate 102, so that Electrode terminal structure is obtained to consolidate.Wherein, the outer end periphery of pole 104 has radial direction boss 105, the footpath Cover plate 102 is fixedly connected on to boss 105, second of gas port 103 can be processed thereon, is made Obtain gas and flow to flip piece 202.In addition, in the present embodiment, the first gas port 103 is along week To being formed in pole 104.That is, the gas port 103 on radial direction boss 105 is for flip piece 202 pressures, and the gas port 103 of the lower section of receiving hole 218 directly can then press to electric-conductor 201. As shown in figure 9, the radial direction boss 105 and body of pole 104 in embodiments of the present invention are respectively formed on There is gas port 103, the first gas port 103 wherein on body is connected with the receiving hole 218 on end face, And number is four and circumferentially set at equal intervals.In other embodiments, the first gas port 103 Number can also be other quantity, the present invention it is without limitation.
As shown in Fig. 2, Fig. 3, Fig. 8 and Figure 10, in order to avoid cover plate is powered, it is preferable that pole 104 It is that needs insulate with cover plate while cover plate is fixedly connected, therefore, pole 104 is fixedly connected on sealing It is connected on the ceramic ring 207 of cover plate 102, for example, is attached by Ceramic brazing.So, compare The insulation of the realizations such as plastics, rubber, reliability and weatherability are stronger, can not only realize that current interruptions are filled The robust seal connection put, additionally it is possible to realize the insulation of the two.Specifically, the outer end periphery of pole 104 With radial direction boss 105, the inner edge of ceramic ring 207 has the radial direction of the support connection radial direction boss 105 Support 208, wherein radial direction boss 105 can be embedded in ceramic ring 207 and be connected with radial support 208, That is, the thinner thickness of radial support 208 with formed for pole 104 be embedded in stepped ramp type receiving space.
As shown in figure 11, in another embodiment of present embodiment, different from above by pole On open up the ventilating mode of gas port 103, radial direction boss 105 and radial support 208 are respectively circumferentially Spaced multiple, i.e., radial direction boss 105 is multiple and circumferentially spaced setting, radial support 208 Also it is multiple and circumferentially spaced setting, and multiple radial direction boss and multiple radial supports are corresponded. So, it can be realized by the interval between adjacent radial boss 105 between radial support 208 logical Gas, structure is simpler ingenious, easy to process, without additionally opening up air guide duct on pole 104, , can be by the size of electric-conductor 201 most so as to not interfere with the region that pole 104 assembles electric-conductor 201 Bigization, so as to increase indentation size and ensure the sensitivity broken.In this embodiment, radial direction boss 104 For three be equally spaced, to take into account connective stability and gas permeability.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 with inner ring and outer ring Hierarchic structure, pole 104 insertion be connected on inner ring.The difference is that, monoblock type radial direction boss In 105 embodiment, inner ring is formed as overall ring-type radial support, and in split type radial direction boss In embodiment, inner ring then forms above-mentioned multiple spaced radial supports 208, so that overall Structure is compacter, and connection is more consolidated.
In the present embodiment, in order to set up current flow path with the external world, it is preferable that ceramic ring 207 Outer face on be sealedly connected with conducting ring 216, be specifically connected on outer ring, flip piece 202 it is outer Periphery is fixedly connected on the conducting ring 216, i.e., flip piece 202 is connected to ceramic ring 207 by conducting ring On, flip piece and the external world can be set up current loop by conducting ring.Wherein led in order to avoid breaking after indentation Electric ring is still electrically connected with pole, and loses the effect of current interruptions.Preferably, conducting ring 216 is sealed It is connected on the outer ring of ceramic ring to be insulated with pole, i.e. pole 104 and conducting ring 216 passes through ceramic ring Insulation.In addition, be sealedly connected on ceramic ring can be so that the outer peripheral edge of flip piece be obtained conducting ring 216 Sealing, so that enclosure air pressure can act on flip piece without gas leakage.
Wherein, in order to realize being stably connected with for conducting ring and flip piece, the outer face of conducting ring 216 is formed There is L-type seam, its inner face is used for the outer ring for connecting ceramic ring.The outer peripheral edge insertion branch of flip piece 202 Support is in the L-type seam, and the block 210 that the outer peripheral edge sets the flip piece 202 by cover seals company It is connected on the L-type seam.So as to while the sealing of stabilization of flip piece 202 assembling is realized, to electricity Stream interruption means 200 can play a protective role.In addition, conducting ring 216 can be by being connected with block Or the electrode leading-out sheet being joined directly together sets up current loop with the external world, such as with adjacent cell It can be connected between 100, or between adjacent cell module by electrode leading-out sheet.
Ceramic ring 207 and cover plate 102 are tightly connected for convenience, it is preferable that the inner of ceramic ring 207 Transition rings 209 are sealedly connected with face, the transition rings 209 can pass through Ceramic brazing with ceramic ring 207 It is connected, and the transition rings 209 are sealedly connected on cover plate 102.Wherein transition rings 209 can also make Ceramic ring 207 is obtained to be arranged at intervals with cover plate 102.Because ceramic ring 207 is not assembled directly with cover plate 102, Avoid cover plate 102 and be high temperature when ceramic ring carries out soldering, in addition will not be to the face of ceramic ring 207 Product causes limitation due to needing directly to assemble with cover plate 102, and is not required to carry out spy to ceramic ring 207 Different design, is manufactured and easy to assembly.
Wherein, as shown in Figure 8, it is preferable that transition rings 209 are with the inner ring for forming Z-type structure and outside Circle, cover plate 102 is formed with the through hole passed through for pole 104, and the end face of the through hole is ledge structure, mistake The inner ring insertion for crossing ring is supported in ledge structure.I.e. in fig. 8, inner ring is located at lower section and embedded logical Kong Zhong, so that increasing the contact area of the two ensures stable connection.
Therefore, in the present embodiment, in order to realize the work of current interrupt device, flip piece 202 Outer peripheral edge needs being sealed, is specifically sealedly connected with ceramic ring between the outer peripheral edge of flip piece and cover plate 207, so as to realize the stabilization of current interrupt device and reliable work by the sealing of ceramic structure. In this ceramic seal structure, in particular by cover plate and transition rings, transition rings and ceramic ring, ceramic ring Each self sealss between conducting ring and conducting ring and flip piece so that the air pressure of enclosure can have Effect acts on current interrupt device, so that current interrupt device reliable operation.When being assembled, In order to ensure the sealing of current interrupt device, ceramic ring 207 respectively with conducting ring 216, pole 104 It is tightly connected between transition rings 209 by Ceramic brazing.I.e. can be first by this composition solely Vertical assembly, is then assembled on cover plate 102, assembling side by the way that transition rings 209 are led into Laser Welding Just on the cover plate without ceramics directly to be welded to soldering.In addition, electric-conductor 201 and pole 104 can be adopted It is connected with Laser Welding, flip piece and electric-conductor can use laser fuU penetration welding or above-mentioned boss welding structure It is connected Deng welding manner, block 210 can be connected with conducting ring by Laser Welding.In addition, pole 104 Can be laser welded with the lead-out tablet of battery core, thus complete overall current interruption means assembling and Work.
The above-mentioned main structure for describing the current interrupt device in first embodiment, is explained below the The arrangement of current interrupt device in one embodiment.
, can be by electricity in order to ensure that the normal of the driving current interrupt device of above-mentioned air pressure timely works Flow interruption means size design it is larger, so and in the case of air pressure is immutable, by increase by Power area increases pull-off force.For example design the larger pull-off force to lift flip piece of area of flip piece. In the present embodiment, as shown in figure 1, design current interruption means 200 extends radially out cover plate 102, So as to increase size.Now in battery modules, cell 100 is multiple, in neighboring unit cell Between 100, in order to avoid the current interrupt device 100 extended is hindered 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 cover plate 102 can be made full use of to be not provided with electrode terminal 101 Region so that the current interrupt device of protrusion will not interfere with the structure on adjacent cover plate, fully save Space in battery bag, improves the energy density in inclusion.Wherein it should be noted that the present invention herein And it is following between neighboring unit cell, current interrupt device and adjacent electrode terminal, Huo Zhe electricity The extremely sub implication with adjacent electrode terminal each means the connection of adjacent feature between different monomers battery, Rather than on same cell adjacent feature connection.
In the present embodiment, current interrupt device 200 extends with adjacent electrode terminal 101 in cover plate Mutually stagger on direction.In other embodiments, the two can also mutually stagger in the height direction.
As a kind of embodiment, as shown in figure 1, between adjacent cell 100, current interruptions Connected between device 200 and adjacent electrode terminals by L-type connector 214, the L-type connector 214 With covering part 211 and lead division 212, the covering of covering part 211 is connected in current interrupt device 200, Lead division 212 extends to adjacent electrode terminal with adjacent thereto.Wherein, L-type as described in Figure 1 Then inflection structure can be extended to first aligns with adjacent electrode terminal on the bearing of trend of cover plate The electrode terminal is re-extended into, in other embodiments, L-type connector can also extend to phase first On adjacent cover plate, electrode terminal then is being extended to, so as to realize the electrical connection of the two.
As another embodiment, as shown in Fig. 2 between adjacent cell 100, in electric current Disconnected device 200 includes the block 210 of covering flip piece 202, and the block 210 is extended to along cover plate 102 Alignd with adjacent electrode terminal, i.e., covering part 211 and lead division 212 with straight line, and It is connected by linear I types connector 215 with adjacent electrode terminal.The I types connector 215 is also It can be used for connecting between other monomers battery 100 and be not provided with the electrode terminal of current interrupt device 200 101, so, by the block 210 of this shape, it can make it that basic need to make in integral battery door module With a kind of this connector.
, as shown in figure 12, can also be by increasing monomer different from the above-mentioned embodiment shown in Fig. 2 The mode of battery 100 is adapted to larger current interrupt device.Specifically, in neighboring unit cell 100 Between, be provided with current interrupt device 200 cell 100 width be more than be not provided with current interruptions The width of the cell of device 200, and current interrupt device 200 is close to the width edge of cover plate 102 Edge extends, so as to can equally realize the adaptation to current interrupt device 200.
It is larger additionally, due to the width of corresponding cell, can cause current interrupt device it is non-bulging with Cover plate, therefore adjacent electrode terminal can be caused to be mutually aligned.It so can equally avoid extending lid The other structures such as the welding structure on the connected cover plate 102 of 200 pairs of current interrupt device of plate 102 cause shadow Ring.And current interrupt device and adjacent electrode terminal preferably, can be caused to pass through linear I Type connector 215 is connected.
In addition when in use, although increase the width of cell 100, but do not increase battery core Capacity, i.e. be provided with the battery core capacity in the cell 100 of current interrupt device 200 with being not provided with Battery core capacity in the cell 100 of current interrupt device is identical, so as to avoid depositing under same module In the cell of different capabilities, and avoid the influence to BMS.Wherein, because battery core capacity is identical, The size exceeded of enclosure can be filled using dividing plate, i.e. dividing plate is filled with around battery core. To cause the assembling structure of battery core stable.Wherein consider the size of battery modules and the size of monomer, The ratio between battery core and the volume of dividing plate can be 1：1-2：1, wherein, dividing plate can by electrolyte resistance material Matter is made.
In addition, considering from current interruptions effect and cost and fit on, in multiple lists of same module In body battery 100, the quantity of the cell of current interrupt device 200 is set to be no more than three； Preferably, the quantity for setting the cell of current interrupt device 200 is 3；Preferably, electricity is set The cell for flowing interruption means 200 is the cell positioned at the end of battery modules and central part； Wherein, if battery modules include the n cells being arranged in order, the monomer electricity of the end of pond module Pond is the 1st cell of battery modules and n-th of cell of battery modules；When n is odd number When, the cell of the central part of the battery modules is the (n+1)th/2 cell of battery modules； When n is even number, the cell of the central part of the battery modules is the n-th/2 of battery modules Cell or the n-th+2/2 cell, wherein n >=3.
Above describe first embodiment of the invention offer current interrupt device, cell, battery Module, in the case where not departing from present inventive concept, feature in first embodiment for example, boss welding structure, Oval indentation, ceramic ring etc. can apply with following other embodiments, with reference to Figure 13 The electrokinetic cell of second embodiment of the invention offer is provided to Figure 17.
As shown in Figure 13 and Figure 14, second embodiment of the present invention provides a kind of cell 1100, The cell 1100 includes shell, the battery core being contained in shell, the electrode electrically connected with the battery core The cover plate 1102 of terminal 1101 and package casing, the electrode terminal 1101 is arranged on cover plate 1102 On for electric current input and output.Wherein the monomer simple 1100 also includes the inside gas with shell The current interrupt device 1200 of body connection, with the mode in first embodiment on electrode terminal not With, current interrupt device 1200 sets on the cover board and connected with the internal gas of shell, wherein The current interrupt device 1200 has electric-conductor 1201 and is connected with the electric-conductor 1201 to be mutually electrically connected The flip piece 1202 connect, flip piece 1202 can disconnect with electric-conductor 1201 under gas pressure to be electrically connected. That is, the current interrupt device base in the operation principle and first embodiment of the current interrupt device 1200 This is identical, be by the air pressure experienced in cell realize flip piece upset and disconnecting circuit.
Wherein, due to being not arranged on electrode terminal, electric-conductor 1201 has to be connected with flip piece 1202 Body 1299 and from the body 1299 extend to electrode terminal 1101 and with the electrode terminal 1101 connected connecting portions 1298, therefore by second embodiment, by current interrupt device 1200 Set on the cover board, can so avoid increasing the height of electrode terminal 1101, so that by using lid The length space of plate and increase battery capacity density.
As shown in Figure 15 to Figure 17, in the present embodiment, the body 1299 of electric-conductor 1201 with The internal gas of shell is connected and is formed with indentation 1205, and the indentation 1205, which is surrounded, to be used to connect upset The tie point of part 1202 is set.So as to break the indentation under gas pressure internally, so as to disconnect Electrical connection between flip piece and electric-conductor.Further, it is provided with passage 1206 on indentation 1205. So, not only by passage 1206 air pressure can be applied on flip piece 1202, and led to Flip piece is crossed to the actual pulling force of indentation, and the position in the passage 1206 can be facilitated to break housing 1205, play a part of being lifted the sensitivity of flip piece 1202, now indentation can also be arranged on upset On part.Wherein passage 1206 can be multiple and is arranged at intervals along indentation 1205.Further for indentation With the feature such as passage, the feature in first embodiment may apply in present embodiment.At it In his embodiment, indentation can be respectively arranged with the body and flip piece of electric-conductor.So, when When the air pressure of enclosure constantly rises, in addition to breaking the indentation on electric-conductor and carrying out interruptive current, may be used also To continue to break the indentation on flip piece, now the gas of inside battery can be filled at flip piece to leaking Go out, and avoid the air pressure in the shell of cell from continuing to increase and ensure.Furthermore it is also possible to allow battery Gas sensor induction alarm or cut-out circuit in inclusion.This part will be discussed in detail in follow-up.
Specifically, broken under the first gas pressure that the indentation 1205 on body can be in shell, Broken in the presence of enough the second air pressure in shell of indentation on flip piece, and the second air pressure is more than the One air pressure.I.e. the intensity of the first indentation is less than the second indentation, can be broken by less first air pressure. Only just continue to break the second indentation when air pressure continues and raised and pressure release.
In the present embodiment, in order to ensure that flip piece 1202 can receive the air pressure force of inside, turn over The outer peripheral edge and electric-conductor 1201 for turning part 1202 are tightly connected, to prevent gas from being let out from flip piece outer peripheral edge Pressure.Specifically, the passage with enclosure gas connection, and cover plate are offered on cover plate 1102 On be sealedly connected with the first ceramic ring 1207 around passage, body 1299 be sealedly connected on this On one ceramic ring 1207, so that air pressure inside can be acted on body 1299 without leaking. In addition to stable assembling flip piece 1202, the outer peripheral edge of flip piece 1202 is sealedly connected on the second ceramics On ring 1296, and second ceramic ring is sealedly connected on electric-conductor 1201.Therefore the second pottery is passed through The insulation characterisitic of ceramic ring, can either stably support the outer peripheral edge of the flip piece 1202 can also be so that leading The outer peripheral edge of electric part and flip piece 1202 is insulated by the second ceramic ring 1296, so in flip piece 1202 Electric current connection can be remained open after being broken with electric-conductor 1201 by indentation 1205, so as to play electric current The effect of interruption.
Specifically, as a kind of embodiment, as shown in figure 17, the body 1299 of electric-conductor 1201 On be formed with annular boss 1297 around indentation 1205, so, pass through the knot of the annular boss 1297 It can be used for forming the features such as indentation 1205 on the inside of structure, its radial direction, and can make it that the ring-type is convex The back side recess sealing of platform 1297 accommodates the first ceramic ring 1207, in addition, annular boss 1297 Outside can be used for sealing and be supported by the second ceramic ring 1296.So, in second embodiment of the invention By the unique texture of the electric-conductor described in Figure 16, the more convenient of current interrupt device 1200 is enabled to Installation.
In addition, the first ceramic ring 1207 is sealedly connected on cover plate 1102 by transition rings 1209, such as Shown in Figure 17, the transition rings 1209 have the connection main body of embedded passage inwall and for connecting the The flange ring of one ceramic ring 1207.The flange ring is radially projecting and fitted with cover plate from connection main body. So as to ensure the stable installation of current interrupt device 200, without the first ceramic ring 1207 directly with lid Plate 1102 is connected.
In the present embodiment, connect for convenience, it is preferable that electrode terminal 1101 is included through lid Plate 1102 and the pole 1104 electrically connected with battery core, the connecting portion 1298 of electric-conductor 1201 are formed with slotting Groove 1295, pole 1104 is penetrated in the slot 1295 and is welded to each other, so as to realize that the stabilization of the two connects Connect.In addition, current interrupt device 1200 include be covered on flip piece 1202 and with the flip piece 1202 The connector 1210 of electrical connection, the connector 1210 has the covering part 1294 of covering flip piece 1202 With the lead division 1293 extended from the covering part 1294.Wherein the connector 1210 can be formed as with The identical structure of L-type connector 214 in first embodiment, i.e. covering part and lead division is formed as L Type inflection structure.Consequently facilitating electric current is drawn out into adjacent electrode terminals from current interrupt device 1200 Or outside module.
Wherein in the battery modules that at least one cell is above-mentioned cell 1100, in electric current Disconnected device extends radially out the cover plate, so as to increase lifting surface area and increase pull-off force.In adjacent list Between body battery, current interrupt device and adjacent electrode terminal are mutual on the bearing of trend of cover plate 1102 Stagger, so as to avoid disturbing the structure on adjacent cover plate.It is with first embodiment identical in addition, The quantity for being provided with the cell 1100 of current interrupt device 1200 is no more than three.
The electrokinetic cell of second embodiment of the invention offer is above described, wherein essentially describing and the The different feature of one embodiment, the feature of two embodiments can be replaced mutually in the case of reconcilable Change, combine, this present invention is not done to this and excessively repeated.
The cell 2100 of third embodiment of the invention offer is introduced with reference to Figure 18, this includes Shell, the battery core being contained in the shell, the electrode terminal 2101 electrically connected with the battery core and encapsulation The cover plate 2102 of shell, electrode terminal 2101 is arranged on cover plate 2102, wherein cell include with The first electrode leading-out piece 2298 of battery core electrical connection, and the second electricity electrically connected with electrode terminal 2101 The explosion-proof valve 2200 connected with the internal gas of shell is additionally provided with pole leading-out piece 2297, cover plate 2102, The explosion-proof valve 2200 has turning over for connection first electrode leading-out piece 2298 and second electrode leading-out piece 2297 Turn part 2202, i.e. two electrode leading-out pieces are connected by the flip piece 2202.
Wherein, it is formed with first on first electrode leading-out piece 2298 and/or second electrode leading-out piece 2297 Disconnect interrupting the first electricity under indentation 2205, the gas pressure that first indentation 2205 can be in shell Electric current on pole leading-out piece 2298 and/or second electrode leading-out piece 2297, i.e. first indentation are acted on The transmission so as to interruptive current, therefore two electrode leading-out pieces are disconnected in causing its electrode leading-out piece of setting In at least one be provided with the disconnection that the electrical connection of battery core and electrode terminal can be achieved in the first indentation, after And cell is disconnected with extraneous electric current transmission.In addition, being additionally provided with flip piece 2202 Disconnect causing shell under two indentations 2299, the gas pressure that second indentation 2299 can be in shell Interior gas outwards releases via flip piece 2202, i.e. the effect of the second indentation is to ventilate, and disconnects After internal gas can be leaked so that avoid inside battery air pressure continue rise cause blast, with rise To explosion-proof.
Specifically, broken under the first gas pressure that the first indentation can be in shell, the second indentation can Broken in the presence of the second air pressure in shell, and the second air pressure is more than the first air pressure.That is the first quarter The intensity of trace 2205 is less than the indentation of the second indentation 2205, can be broken by less first air pressure. Only just continue to break the second indentation 2205 when air pressure continues and raised and pressure release.
As shown in figure 18, in the present embodiment, two electrode leading-out pieces can be lengthy motion picture structure, this Sample prolongs in order to turn-off current, width of first indentation 225 along the long chip architecture from a lateral edges Another lateral edges are reached, can so allow long chip architecture to be broken more in time along the first indentation.Its Middle flip piece 2202 could be formed with ring-type outer wall, and two electrode leading-out pieces can be fixedly connected on ring-type On lateral wall, to realize that electric current is transmitted.Specifically, in the present invention, the ring-type outer wall of the flip piece can To be formed for example, by the boss in boss welding structure, flip piece is also formed with conical ring structure in addition, should Conical ring, from the outward-dipping outer peripheral edge for extending to flip piece of boss, is in bowl-shape flip piece to be formed.In addition, Second indentation can be formed as cyclic structure around the circumference of flip piece, thoroughly to break under gas pressure Open, increase air venting efficiency.Specifically the second indentation may be formed in conical ring structure.In order that must turn over The first indentation and the second indentation, the periphery of flip piece 2202 can effectively be broken by gas pressure by turning part Edge and the relatively-stationary insulated enclosure of the cover plate, so one side can avoid gas from not breaking the Just leaked in the case of one indentation and the second indentation and make it that two indentations are ineffective.On the other hand, lead to Crossing insulation connection can avoid cover plate powered.
In the present embodiment, electrode terminal 2101 includes the pole through cover plate, and the pole passes through the Two ceramic rings are connected with the outside insulation of cover plate, in order to set up current loop with the external world.I.e. adjacent list It is the interconnection by electrode terminal between body battery to realize.It can wherein be avoided by ceramic ring Cover plate is powered.In addition, being sealedly connected with the first ceramic ring between the outer peripheral edge of flip piece 2202 and cover plate 2207, equally play a part of sealing and insulate.
In addition, being fixedly connected with First Transition piece on flip piece 2202, cover plate 2102 for the ease of connecting 2295, the periphery of flip piece 2202 is fixedly connected with the second transition plate 2296, First Transition piece and second Transition plate can be aluminium flake.The transition plate 2296 of First Transition piece 2295 and second and the first ceramic ring 2207 Coaxially soldering is connected.So, when being assembled, two transition plates can be passed through into soldering side first Formula is welded on ceramic ring, is then welded, can be so kept away with other structures by two stators Exempt from the structures such as ceramic ring and cover plate carry out between soldering and high temperature for producing etc. so that easy to assembly and pass through First ceramic ring 2207 realizes sealing, firm and insulation sealing, and can prevent the band of cover plate 2102 Electricity.
Specifically the transition plate 2296 of First Transition piece 2295 and second can be respectively cyclic structure to adapt to Two annular end faces of ceramic ring.Furthermore it is preferred that cover plate 2102 is formed with annular boss, first Transition plate 2205 is supported on the annular boss, and ceramic ring is close to the inwall direction second of the annular boss Transition plate 2296 extends, so that by the way that ceramic ring is stably connected in cover plate 2102.
In addition, explosion-proof valve also includes the diaphragm 2099 that can be broken through by air pressure, diaphragm sealing is covered in The top of flip piece 2202, is in particular connected on the First Transition piece 2295 away from flip piece.So Diaphragm 2099 can be played to the protective action inside explosion-proof valve 2200 under normal circumstances, and is being needed When explosion-proof, it can be broken through by certain air pressure, for example the second air pressure, so as to avoid influenceing the anti-of explosion-proof valve Quick-fried effect.
In addition, in order to realize that the priority of two indentations is pulled off in the present invention, the residual thickness of the first indentation It is 1 with the ratio between the residual thickness of the second indentation:3-1:1.2.Further it is 1:2-1:1.3.
The cell of third embodiment of the invention offer is be provided.With reference to Figure 22 introductions The 4th embodiment that the present invention is provided.
The 4th embodiment of the present invention provides a kind of cell 3100 and using the cell Battery modules.The cell 3100 includes shell, the battery core being contained in the shell, package casing Cover plate 3102 and the electrode terminal 3101 that is arranged on cover plate 3102, wherein, cell 3100 Also include the interior leading-out piece 3299 that is electrically connected with battery core and be connected to interior leading-out piece 3299 and electrode terminal Current interrupt device 3200 between 3101, wherein, different from being arranged on pole in first embodiment Current interrupt device 3200 in the mode of upper outer end, present embodiment be located at the inner side of cover plate 3102 and Connected with the internal gas of shell so that the electric current flowed through can be disconnected under gas pressure, wherein, electrode tip The adaptor 3298 extended radially outward from outer peripheral edge is connected with son 3101, to pass through the adaptor The outer peripheral edge of 3298 connection current interrupt devices.
So, due to the adaptor 3298 extended radially outwards from the outer peripheral edge of electrode terminal so that The current interrupt device being connected with the radial outside of adaptor 3298, compared to what is be directly connected with electrode terminal Mode, it is bigger that its area can be designed, so as to increase force surface of the air pressure inside to electrode interruption means Product, so that the stress of electrode interruption means can be lifted in the case where air pressure is constant, and in motor current The sensitivity of disconnected device 3200, completes the cut-out of electric current in time.Wherein especially in the battery of the present invention Apply in the big battery such as electrokinetic cell field, due to generally requiring to transmit high current, therefore increase switching The size of part and high current interruption means has the transmission using high current.
In the present embodiment, adaptor 3298 is formed as cyclic structure, the inner peripheral of the cyclic structure It is connected with the outer peripheral edge of electrode terminal, outer peripheral edge is connected with the outer peripheral edge of current interrupt device, so as to play Increase the effect of current interrupt device area, in other embodiments, adaptor 3298 can also be Radially extend and multiple connecting poles of circumferentially spaced setting structure, can equally realize increase electric current The effect of the area of interruption means.
In the present embodiment, in order to increase the firm of adaptor and electrode terminal and current interrupt device Degree, it is ensured that electric current transmission is stable.Preferably, in the inner peripheral of the cyclic structure and the electrode terminal The outer peripheral edge seam at end coordinates, and specifically can be formed with seam on the inner outer peripheral edge of electrode terminal, And the inner peripheral of adaptor is embedded in the seam and is connected, so that increasing connection area is ensureing stable connection While can increase electric current transmission efficiency.The interior outer end of wherein electrode terminal is relative along its axial direction Defined in shell, i.e. close to enclosure be the inner.
In addition, in the present embodiment, the outer peripheral edge of cyclic structure is projecting inward towards the shell, even if The structure that cyclic structure is formed as ring cap in itself is obtained, and current interrupt device and the inner side of the outer peripheral edge are stopped Mouth coordinates, so as to not only ensure stable connection increase electric current transmission efficiency but also can be spaced apart current interruptions Device and electrode terminal, so that the disconnection for current interrupt device 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, The connection sheet extends from battery core towards cover plate direction.Leading-out piece also includes being used to accommodate installing electric current in addition The support slot of interruption means, and the connecting plate extended from the support slot towards opposite direction, connecting plate point It is not connected with cover plate insulation, so as to avoid cover plate powered, specifically, connecting plate can be formed with link slot For overall laminated structure, i.e. link slot include two side walls and a bottom wall, two side walls respectively with both sides Connecting plate be connected.In addition, in order that obtaining current interrupt device and enclosure gas connection, Ke Yishe The air passing hole with enclosure gas connection is formed with the bottom wall for counting support slot.
In the present embodiment, in order to avoid cover plate is powered, interior leading-out piece 3299 passes through ceramic member 3296 Insulation is connected to the inner side of cover plate 3102.Specifically, ceramic member 3296 can be formed as potsherd, and It is weldingly connected respectively by transition plate 3294 with interior leading-out piece 3299 and cover plate, i.e., transition plate 3294 is Two panels, the transition plate can be aluminium flake, respectively positioned at the upper and lower surface of ceramic member 3296, ceramic member 3296 It is welded to connect, is made pottery simultaneously by the transition plate 3294 positioned at the upper surface of ceramic member 3296 and cover plate 3102 Porcelain piece 3296 is also welded by the transition plate 3294 positioned at the lower surface of ceramic member 3296 with interior leading-out piece 3299 Connect in succession, so that the welding between ceramic member 3296 and cover plate 3102 and interior leading-out piece 3299 Connection is more easy to realize, and welding structure is stable.Wherein ceramic member 3296 and lower surface disposed thereon It can be connected between transition plate 3294 by Ceramic brazing, the transition plate positioned at the upper surface of ceramic member 3296 It can be connected between 3294 and cover plate 3102 by laser welding, positioned at the mistake of the lower surface of ceramic member 3296 Crossing can be connected between piece 3294 and interior leading-out piece 3299 by laser welding.
In the present embodiment, current interrupt device 3200 have electric-conductor 3201 and with the electric-conductor The 3201 connected flip pieces 3202 to be electrically connected to each other, and flip piece 3202 and the energy of electric-conductor 3201 Enough that electrical connection is disconnected under gas pressure, wherein electric-conductor 3201 is connected on interior leading-out piece 3299 and shape The gas port 3203 of Cheng Youyu enclosure gas connections, specifically, the insertion of electric-conductor 3201 are connected to In the support slot of interior leading-out piece, the air passing hole formed in such support slot can be with the gas of gas port 3203 Connection, so that flip piece 3202 can experience the internal gas pressure of shell, so that internally The electrical connection of flip piece 3202 and electric-conductor 3201 is disconnected under gas pressure.Wherein, flip piece 3202 Outer peripheral edge be connected to set up electric current access path with the outer peripheral edge of adaptor 3298.
Wherein, in the present embodiment, as a kind of mode for disconnecting electrical connection, on electric-conductor 3201 Indentation is formed with, the indentation surrounds the tie point for being used to connect flip piece 3202 and set.So, inside In the presence of portion's air pressure, the indentation can be pulled off to disconnect the electrical connection with flip piece.In other implementations In mode, indentation can also be formed on flip piece or by the way of the two tie point is broken.In order to Realize pressure of the air pressure to flip piece 3202, the outer peripheral edge of flip piece 3202 passes through insulating part 3295 Support is connected on electric-conductor 3201 and/or interior leading-out piece 3299, so as to pass through the realization pair of insulating part 3295 The assembling of flip piece 3202, so ensure that outer peripheral edge and interior leading-out piece 3299 and the conduction of flip piece Part insulate, so that avoid can also be after flip piece disconnects with electric-conductor under gas pressure and electrically connected Outer peripheral edge is electrically connected with electric-conductor or interior leading-out piece.
Specifically, insulating part can have for the ring-type insulating parts such as ceramic ring, sealing ring, wherein insulating part Three kinds of connected modes, first is that sealing is supported on electric-conductor 3201, is in particular supported on electric-conductor 3201, to be supported on interior leading-out piece 3299, in particular prop up around the region for being pulled off region, second Support in interior leading-out piece 3299 on the region of electric-conductor 3201, the 3rd is while is supported on interior leading-out piece 3299 and electric-conductor 3201 on, i.e., as shown in figure 23, insulating part, which is supported on, interior leading-out piece 3299 and leads On the join domain of electric part 3201.
Wherein, in order to ensure that the electric current of electric-conductor and flip piece transmits stable, it is especially adapted for use in high current Electrokinetic cell, it is similar with first embodiment, electric-conductor set indentation 3205 in the case of, such as Shown in Figure 23, flip piece 3202 is welded by the boss surrounded by indentation 3205 with electric-conductor 3201 and tied Structure is connected, and the boss welding structure includes boss 3203, accommodates the connecting hole 3204 of the boss 3203 And the annular solder joint 3217 between the boss 3203 and connecting hole 3204, so as to ensure high current Effectively pass through.Wherein specifically, as shown in figure 23, with first embodiment shown in Fig. 6 not Together, boss 3203 is formed on flip piece 3202, and connecting hole 3204 is formed on electric-conductor 3201. In addition it is also possible to identical with first embodiment, boss formation is on electric-conductor 3201, connecting hole 3204 Formed on flip piece.
In addition, as shown in figure 22, as a kind of embodiment, electric-conductor 3201 can be formed as hat shape knot Structure, the cap-like structure includes the cap body being connected with flip piece and the brim of a hat around the cap body, wherein on the brim of a hat It is formed with above-mentioned gas port and is connected with interior leading-out piece, and cap body is protruded towards flip piece, flip piece shape Above-mentioned insulating part is connected with as laminated structure, and between the outer peripheral edge of the laminated structure and the brim of a hat 3295.So that the compact conformation for the current interrupt device that the present invention is provided, assembling is stable.
In the present embodiment, in order to set up current loop with the external world, it is preferable that electrode terminal 3101 Including the pole 3104 through cover plate, the pole is connected by ceramic ring 3293 with cover plate insulation, so that Avoid cover plate powered, adaptor 3298 is connected on the inner of the pole with by exposing outside cover plate in addition Part set up current loop with the external world.Specifically, ceramic ring 3293 is sealedly connected on the appearance of cover plate On face, and it is connected with the sealing of pole 3104, to ensure the sealing effectiveness inside cover plate.Wherein, pole On axially through being formed with stomata 3292.So, the electricity interrupted in the compression of current interrupt device 3200 It will not be influenceed but can be set up with ambient atmosphere by closed chamber air pressure in cover plate during connection Pressure difference is so that flip piece 3202 acts in the presence of inside and outside differential pressure and breaks indentation 3205.
The cell of four embodiment of the invention offer is be provided.With reference to Figure 24 introductions The 5th embodiment that the present invention is provided.
The 5th embodiment of the present invention provides a kind of cell 4100 and using the cell Battery modules, the wherein cell 4100 include shell, the battery core being contained in shell and the electricity The electrode terminal 4101 of core electrical connection and the cover plate 4102 of package casing, electrode terminal 4101 are arranged on On cover plate 4102, wherein, electrode terminal includes through cover plate 4102 and passes through interior leading-out piece 4196 with battery core The pole 4104 of electrical connection, cell also includes the current interrupt device being arranged on pole 4104 4200, the current interrupt device 4200 have fixed relative to cover plate 4102 and with the internal gas of shell The flip piece 4202 of connection, and flip piece 4202 is connected with the outer face of pole 4104 by tie point, The tie point can disconnect under gas pressure.So, in present embodiment current interrupt device work Principle is directly to pull open the tie point of flip piece 4202 and pole 4104 by air pressure, so as to interrupt The electrical connection of the two.
In order to lift sensitivity, it is preferable that flip piece 4202 is connected by single solder joint 4199 with pole. The solder joint 4199 for example completed by spot welding, can additionally pass through other welding means realities such as Laser Welding It is existing.Therefore, can reasonably it be implemented by the fusion penetration of butt welding point, molten wide in present embodiment, from And realize the control to breaking pressure.
In the present embodiment, similar to first embodiment, it is formed with pole 4104 and shell The gas port 4103 of inside connection, so as to which air pressure inside easily is directed into current interrupt device On.In addition, for the reliability of further motor current interruption means, it is preferable that flip piece 4202 On be formed with indentation 4205, the indentation 4205 around tie point set.So, connection is broken except above-mentioned Point is outer, can also realize the interruption of electric current by breaking indentation 4205.In the present embodiment, even The air pressure of breaking of contact and indentation has priority, specifically, the first gas that tie point can be in shell Broken under pressure effect, indentation 4205 can be broken in the presence of the second air pressure, the second air pressure is more than the One air pressure.So that indentation 4205 can as tie point back-up measures, it is ensured that the safety of battery. It is highly preferred that covered with block 4210 on flip piece 4202, stomata 4197 is formed with the block 4210. So, after indentation 4205 is pulled off, the gas of enclosure can by by flip piece again from stomata In 4197 discharge, then realize the pressure release of inside battery, prevent inside battery from exploding, this principle and The explosion-proof valve of 3rd embodiment is similar.
In the present embodiment, the first ceramic ring 4207 is connected between pole 4104 and cover plate 4102, So as to realize that the stable of pole is installed while avoiding cover plate 4102 powered by ceramic structure.In addition, Sealed between pole 4104 and the outer peripheral edge of flip piece and be connected to the second ceramic ring 4198 repeatedly, so as to The sealing of the outer peripheral edge of flip piece is realized by the ceramic structure, it is ensured that interior gas can be effectively to flip piece Pressure, while ensureing to insulate between pole and the outer peripheral edge of flip piece, it is to avoid break tie point or quarter Flip piece after trace remains able to conduction.
Specifically as a kind of embodiment, pole 4104 has the annular boss being formed with around tie point 4297, so that by the design feature of the annular boss, the back side recess of the annular boss 4297 is close Envelope accommodates the first ceramic ring 4207, and first ceramic ring 4207 is sealedly connected on cover plate 4102, ring The radial outside sealing of shape boss 4297 is supported by the second ceramic ring 4198, second ceramic ring 4198 The outer peripheral edge of sealing support flip piece 4202.So that the structure of overall current interruption means is compacter, And assemble stabilization.For the ease of assembling, the first ceramic ring 4207 is tightly connected by transition rings 4209 On cover plate 4102.Specifically can be by transition rings and the first ceramic ring 4207 progress Ceramic brazing It is tightly connected.
The first to the 5th embodiment of the invention is above described, below, with reference to Figure 20 and Figure 21 introductions Cell and the embodiment of battery modules that a kind of present invention is provided, wherein with said structure embodiment The effect of same characteristic features is not done excessively repeat herein.
In the present embodiment there is provided a kind of cell, the cell 100 includes shell 109, held The battery core 108 that is contained in shell 109, the electrode terminal 101 electrically connected with the battery core 108 and encapsulation The cover plate 102 of shell, electrode terminal 101 is arranged on cover plate 102, and electrode terminal is included through cover plate 102 and the pole 104 that is electrically connected with battery core, cell also includes the electric current being arranged on pole 104 Interruption means 200, the current interrupt device 200 is connected with the internal gas of shell, wherein current interruptions Device 200 has electric-conductor 201 and is connected with the electric-conductor 201 with the flip piece 202 being electrically connected to each other, And flip piece 202 can disconnect with electric-conductor 201 under gas pressure to be electrically connected, wherein electric-conductor 201 It is connected on pole 104 to be electrically connected to each other, flip piece 202 is welded by boss with electric-conductor 201 and tied Structure be connected, the boss welding structure include boss 203, accommodate the boss 203 connecting hole 204 and Annular solder joint 217 between the boss 203 and connecting hole 204, flip piece 202 is formed as first Connecting hole 204 is formed with laminated structure, first laminated structure, electric-conductor 201 is formed as second It is formed with shape structure, second laminated structure on boss 203, electric-conductor 203 and is formed with indentation 205, The indentation 205 is set around boss 203, and electric-conductor 201 is connected to the outer end end face of pole 104 On, the outer peripheral edge of flip piece 202 is fixed relative to cover plate 102, and pole 104 is fixed with cover plate 102 to be connected Connect, and be formed with pole 104 connection enclosure and current interrupt device 200 air guide duct, Pole 104 is arranged on and is sealedly attached on the ceramic ring 207 on cover plate 102, the outer end of ceramic ring 207 Conducting ring 216 is sealedly connected with face, the outer peripheral edge of flip piece 202 is sealedly connected on the conducting ring 216 On, pole 104 is insulated with conducting ring 216 by ceramic ring 207.So as to stably accomplish the biography of electric current Pass and interrupt.
In the present embodiment, receiving hole 218, electric-conductor 201 are formed with the outer end end face of pole 104 Outer peripheral edge be fixed on the inwall of the receiving hole.
In the present embodiment, indentation 205 is ellipse, and boss 203 is circle, and indentation 205 The center of circle and the center of circle of boss 203 are staggered along the oval long axis direction, and the major axis and electricity of ellipse The axis of extreme son is obliquely installed.
In the present embodiment, and the outer end periphery of pole 104 has radial direction boss 105, ceramic ring 207 Inner edge there is support to connect the radial support 208 of the radial direction boss 105, radial direction boss 105 is along week To spaced multiple, radial support 208 is multiple for circumferentially spaced setting, and the plurality of radial direction Boss and multiple radial supports are corresponded.
In the present embodiment, the outer face of ceramic ring 207 is formed as the hierarchic structure with inner ring and outer ring, The insertion of pole 104 is connected on inner ring, and the conducting ring 216 insulated with pole is sealedly connected with outer ring, The outer peripheral edge of flip piece 202 is fixedly connected on the conducting ring 216, close on the inner face of ceramic ring 207 Envelope is connected with transition rings 209, and the transition rings 209 are sealedly connected on cover plate 102 to cause ceramic ring 207 It is arranged at intervals with cover plate 102.
In the present embodiment, ceramic ring 207 respectively with conducting ring 216, pole 104 and transition rings 209 Between be tightly connected by Ceramic brazing.
In the present embodiment, transition rings 209 have inner ring and the outer ring for forming Z-type structure, and cover plate is formed There is the through hole passed through for pole 104, the end face of the through hole is ledge structure, the inner ring insertion branch of transition rings Support is in ledge structure.
In the present embodiment, the outer face of conducting ring 216 is formed with outside L-type seam, flip piece 202 Periphery insertion is supported in the L-type seam, and the outer peripheral edge sets the block of the flip piece 202 by cover 210 are sealedly connected on the L-type seam.
Wherein, in order to complete the assembling of the cell, as shown in figs 20 and 21, connect in battery core 108 Lower spacer ring 107 is connected to, the lower section of cover plate 102 is connected with spacer ring 106, and spacer ring can use insulation material up and down Matter is made.Wherein, cell 100 also includes the interior connection sheet 110 being connected with battery core, the interior connection Piece 110 is extended between spacer ring 107 and lower spacer ring 106, in order to transmit electric current, pole 104 Lower surface is formed with end difference, and this connects end difference through cover plate 102 and upper spacer ring 106 and interior connection sheet 110 End clamping.So as to complete electric current from battery core 108 to the transmission of pole 104 and cause cover plate 102 Insulated with shell 109, it is to avoid powered.
In the battery modules that the present embodiment is provided, the battery modules include multiple cells, at least one Individual cell is above-mentioned cell, and current interrupt device 200 extends radially out cover plate 102, Between adjacent cell 100, current interrupt device 200 on the bearing of trend of cover plate with it is adjacent Electrode terminal mutually stagger.In addition, between adjacent cell 100, current interrupt device 200 It is connected between adjacent electrode terminal by L-type connector 214, the L-type connector 214, which has, to be covered Cap 211 and lead division 212, the covering of covering part 211 are connected in current interrupt device 200, are drawn Portion 212 extends to adjacent electrode terminal.
In addition, the present embodiment also provides a kind of electrokinetic cell, it is characterised in that the electrokinetic cell includes bag Body and the battery modules being contained in the inclusion, battery modules are above-mentioned battery modules, and in inclusion The gas-detecting device for detecting fuel gas is provided with, the gas-detecting device adjacent currents interrupt dress Install, for providing fuel gas signal for charge and discharge protecting system.Furthermore, it is contemplated that cost and There is a current interrupt device in effect, the battery modules.
Above describe the cell with current interrupt device or explosion-proof valve, current interruptions dress therein Put or explosion-proof valve is the safety measure realized by the mechanical structure of itself.The present invention will be situated between in detail below Continuing includes the electrokinetic cell of charge and discharge protecting system, to lift security by automatically controlled mode.
As shown in figure 19, the present invention provides a kind of electrokinetic cell, and the electrokinetic cell can above-mentioned be had Current interrupt device, explosion-proof valve or other kinds of electrokinetic cell.Wherein, electrokinetic cell include inclusion and Multiple cells 100 in the inclusion are contained in, wherein the plurality of cell 100 is for example with series connection Mode or parallel way composition battery modules, wherein being provided with the inclusion for detecting in electrokinetic cell Fuel gas gas-detecting device 300, such as gas sensor, thus for whether cut off power electric The charge-discharge circuit in pond provides signal.
Wherein, the charge and discharge protecting system that the electrokinetic cell includes is above-mentioned in electrokinetic cell except including Outside gas-detecting device 300, in addition to control device 400 and current switching device.
Wherein, fuel gas signal is fed back to control device 400 by gas-detecting device 300, the control Device 400 is used for the discharge and recharge electricity that electrokinetic cell is cut off according to fuel gas signal control electric current lane device Road.That is, the present invention in security by detect in inclusion with the presence or absence of fuel gas and carry out Automatically control.Wherein, it is that inside can produce fuel gas the precarious position such as to overcharge in battery, this Portion gas can be more or less leaked into inclusion by various modes, now gas-detecting device, example As airtight sensor is able to detect that fuel gas, and feed back to control device, control device according to whether The amount of the fuel gas detected or the fuel gas detected decides whether to cut off electrokinetic cell Charge-discharge circuit.When detecting fuel gas, or fuel gas amount exceed predetermined threshold value when, can To control circuit path device to cut off the charge-discharge circuit of electrokinetic cell, to ensure the safety of electrokinetic cell.
In order to further reduce potential safety hazard.Electrokinetic cell also includes the report controlled by control device 400 Alarm device 500, so can point out related personnel to remove by warning devices such as voice, flashing light, sirens From scene, and reduce potential safety hazard.
As shown in figure 19, the host computer main control chip 401 of control device 400 including electrokinetic cell and with The control module 402 of main control chip signal connection, control module 402 connects with connecting and disconnecting of the circuit device signal Connect.Wherein current switching device can be the relay 403 in charge-discharge circuit, with by control mould Charge-discharge circuit is cut off in the control of block 402, in addition warning device 500 can directly with PC control core The signal of piece 401 is connected, so as to receive alarm command alarm.
In the specific course of work, it can do digital-to-analogue conversion for the collection signal of gas sensor, adopt The processing such as sample preservation, it can in addition contain carry out the breakdown judge of system, when system does not break down, Signal can will be further gathered to carry out the processing of gas concentration to judge whether to there occurs fuel gas Leakage, when occur fuel gas leakage concentration exceed threshold value when, entered by host computer main control chip 401 Row cut-out electric current and the operation of alarm.
Wherein, in this embodiment, gas-detecting device is arranged on outside cell, fuel gas Released after being pulled off by the indentation in above-mentioned current interrupt device or explosion-proof valve, as long as in addition Gas can be released, can also be by being released well known to a person skilled in the art various conventional explosion-proof valves.That is, In battery modules, it is provided with least one cell under the effect of cell internal gas pressure Cut off the current interrupt device of charge-discharge circuit, i.e., foregoing each current interrupt device.And current interruptions Device can enable the gas in shell to leak in the switched off state.So that the gas in inclusion Detection means is able to detect that the fuel gas leaked, now represent battery occurred in that overcharge wait danger Situation.In addition, for the sensitivity of lifting system, it is preferable that gas-detecting device adjacent currents are interrupted Device is set, so as to can detect corresponding signal in time after fuel gas release and feed back to control dress Put.In addition, in addition to current interrupt device, in some embodiments, being set at least one cell The explosion-proof valve of gas, the such as the 3rd can be released under cell internal gas pressure effect by being equipped with Explosion-proof valve in embodiment, now, gas-detecting device can neighbouring explosion-proof valve settings.
In the present embodiment, in order to realize the electric current in above-mentioned gas leak, the respective embodiments described above Interruption means has covering, and stomata 213 is formed with the covering to cause the gas in the shell It can be leaked after flip piece and electric-conductor disconnect electrical connection.In addition, the stomata on covering can also make Obtain current interrupt device and directly set up pressure difference with air, so as to realize the action of flip piece.Wherein herein Covering can be the block 210 in first embodiment or the connection in second embodiment Part 1210, or be diaphragm 2099 in the 3rd embodiment etc..So as to be carved accordingly After trace is pulled off so that gas can release for example, by the stomata 213 in first embodiment, so that Detect the fuel gas leaked into bag in time by gas-detecting device.
Five kinds of embodiments of the present invention are described in detail above in association with accompanying drawing, still, the present invention is not limited Detail in above-mentioned embodiment, can be to the present invention in the range of the technology design of the present invention Technical scheme carry out a variety of simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned embodiment is special Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not The repetition wanted, the present invention no longer separately illustrates to various possible combinations.
In addition, various embodiments of the present invention can be combined randomly, as long as its Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Finally, the Developed Background for introducing foregoing invention design of the present invention is described：
With increasingly sharpening for environmental pollution, the exploitation of new-energy automobile into national new strategical planning, And the mixed dynamic or pure electric automobile in new-energy automobile occupies the main flow in current automobile market, electronic Automotive field, course continuation mileage is currently the principal element of restriction development, and this energy for depending on battery core is close Degree, the main core material of existing market is ternary and LiFePO4 Liang Ge camps, the former energy density Height, but poor safety performance, blast on fire can be caused by especially overcharging, and this is tight for security performance requirement The automobile industry of lattice is a very big challenge.
But the increase of battery capacity can bring higher course continuation mileage, this allows for everybody to ternary material Security performance need to take certain improvement project to ensure its security, but due to material performance very It is difficult it is further improved, can only go to try every possible means from structure top.
As stated in the Background Art, existing battery bag design substantially passes through BMS (battery management system) To carry out voltage and current temperature management and control to the battery core in module, but in actual use, the one of battery core The reliability of cause property and management software still has certain accidental risk.Specifically, with reference to people for moving The use habit of dynamic equipment, for electric automobile, masses, which typically can also exist, plugs in car body always The situation of charging, although have BMS softwares to be controlled, single this battery charges for a long time, if software The risk that battery core is overcharged in inclusion loop just occurs in detection failure or other exceptions.Therefore, it is of the invention Inventor expects being a kind of mechanical design protection of battery design, to avoid causing after software failure Battery security risk.
For mechanical safeguard measure, the present inventor is creatively had found, battery is being overcharged Current interruptions opportunity under precarious position is regular governed in fact, i.e. can utilize and the danger such as overcharge The principle that air pressure inside rises when dangerous state occurs, designs the electric current for the electric current that can interrupt electrode terminal Interruption means or explosion-proof valve, so as to the input or output of coordination electrode terminal, to ensure safety.
Further, since the electrokinetic cell capacity used on automobile is generally more than ten times of 3C battery classes, and And be even more dozens or even hundreds of times of baby battery class by electric current, so also requiring that this piece has to lead to Very big electric current is crossed, and due to use environment, its weatherability and sealing requirements are stricter, These problems just form technical scheme in each above-mentioned embodiment of the present invention after collecting.And And by verification experimental verification, current interrupt device or explosion-proof valve in each embodiment of the invention can and When disconnect battery electric current, so as to effectively lift security.
For example, therefore the overcurrent of electrokinetic cell is big, the overcurrent requirement to welding position and rotating sheet is big, Therefore first embodiment of the invention will be it is also mentioned that boss welding structure, to lift weld strength, so will So that the disconnection difficulty between rotating sheet and electric-conductor is big.So consider after these problems, can think Go out to increase the area of current interrupt device to make rotating sheet easily overturn.For example, the present invention is implemented first What is referred in mode is designed as by increasing cell size (Figure 12), or by current interrupt device Extend cover plate (Fig. 2), and increase adaptor (Figure 22) in the 4th embodiment, be for energy It is enough by current interrupt device design it is larger to lift lifting surface area, so as to lift sensitivity so that upset Part is more easy to act and play the purpose of interruptive current, and be particularly suitable for use in electrokinetic cell.

Claims (17)

1. a kind of battery modules, including multiple cells (100), the cell (100) include Shell, the battery core being contained in shell, the electrode terminal (101) electrically connected with the battery core and encapsulation The cover plate (102) of the shell, the electrode terminal (101) is arranged on the cover plate (102), Characterized in that, at least one cell (100) includes electrically connecting with the electrode terminal (100) Current interrupt device (200), the internal gas of the current interrupt device (200) and the shell connects The electric current flowed through can be disconnected under gas pressure by passing to,
Wherein, between neighboring unit cell (100), it is provided with the current interrupt device (200) Cell (100) width be more than be not provided with current interrupt device (200) cell width Degree, and the current interrupt device (200) is radially close to the width of the cover plate (102) On both sides of the edge extension.
2. battery modules according to claim 1, it is characterised in that adjacent cell (100) In, adjacent electrode terminal is mutually aligned on the bearing of trend of the cover plate (102).
3. battery modules according to claim 2, it is characterised in that in the adjacent monomer Between battery (100), the current interrupt device passes through I types connector (215) with adjacent electrode terminal It is connected.
4. battery modules according to claim 1, it is characterised in that be provided with the electric current The quantity of the cell of disconnected device (200) is no more than three.
5. battery modules according to claim 1, it is characterised in that be provided with the electric current Battery core capacity in the cell (100) of disconnected device (200) is with being not provided with the current interrupt device Cell (100) in battery core capacity it is identical.
6. battery modules according to claim 1 or 5, it is characterised in that described being provided with In the cell (100) of current interrupt device (200), dividing plate is filled with around the battery core.
7. battery modules according to claim 6, it is characterised in that the battery core and it is described every The ratio between volume of plate is 1：1-2：1.
8. battery modules according to claim 1, it is characterised in that the current interrupt device (200) there is electric-conductor (201) and be connected with the electric-conductor (201) with the upset being electrically connected to each other Part (202), and the flip piece (202) can be under gas pressure with the electric-conductor (201) Disconnect electrical connection.
9. battery modules according to claim 8, it is characterised in that the electric-conductor (203) On be formed with indentation (205), the indentation (205), which is surrounded, to be used to connect the companies of the flip piece (202) Contact is set.
10. battery modules according to claim 8, it is characterised in that the flip piece (202) It is connected with the electric-conductor (201) by boss welding structure, the boss welding structure includes boss (203) connecting hole (204) of the boss (203), is accommodated and positioned at the boss (203) and even Connect the annular solder joint (217) between hole (204).
11. battery modules according to claim 10, it is characterised in that the flip piece (202) Be formed as the first laminated structure, first laminated structure is formed with the connecting hole (204), the conduction Part (201) is formed as the second laminated structure, and the boss (203) is formed with second laminated structure.
12. battery modules according to claim 9, it is characterised in that the indentation (205) For ellipse, the tie point is rounded connecting point, and the center of circle of the indentation (205) with it is described Stagger along the oval long axis direction in the center of circle of tie point.
13. battery modules according to claim 8, it is characterised in that the flip piece (202) It is coaxially disposed with the electrode terminal (101), the electric-conductor (203) is relative to the electrode terminal (101) axis is obliquely installed.
14. battery modules according to claim 8, it is characterised in that the electric-conductor (201) On the outer end end face for being connected to the pole (104), the outer peripheral edge of the flip piece (202) relative to The cover plate (102) is fixed.
15. battery modules according to claim 14, it is characterised in that the flip piece (202) Outer peripheral edge and the cover plate (102) between be sealedly connected with ceramic ring (207).
16. a kind of electrokinetic cell, including inclusion and the battery modules being arranged in the inclusion, its feature exist In the battery modules are the battery modules according to any one in claim 1-15.
17. a kind of electric automobile, it is characterised in that the electric automobile is provided with according to claim 16 Described electrokinetic cell.
CN201610105607.5A 2016-02-25 2016-02-25 Battery module, power battery and electric automobile Active CN107123781B (en)

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