CN206210970U - Electrokinetic cell and its protection system and electric automobile - Google Patents

Electrokinetic cell and its protection system and electric automobile Download PDF

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Publication number
CN206210970U
CN206210970U CN201621010499.5U CN201621010499U CN206210970U CN 206210970 U CN206210970 U CN 206210970U CN 201621010499 U CN201621010499 U CN 201621010499U CN 206210970 U CN206210970 U CN 206210970U
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China
Prior art keywords
gas
cell
electric
electrokinetic cell
flip piece
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Active
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CN201621010499.5U
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Chinese (zh)
Inventor
潘晓萍
周燕飞
谢秀梅
张中林
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Shenzhen BYD Lithium Battery Co Ltd
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BYD Co Ltd
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • 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
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The utility model discloses a kind of electrokinetic cell and its protection system and electric automobile.The protection system includes control device (400), connecting and disconnecting of the circuit device and the gas-detecting device (300) in electrokinetic cell；The gas-detecting device (300), for detecting the fuel gas in the electrokinetic cell when the mechanism of induction air pressure opens and the signal of detection being fed back into the control device (400), the control device (400), for determining whether the charge-discharge circuit for controlling the connecting and disconnecting of the circuit device to cut off the electrokinetic cell according to the signal for being detected.

Description

Electrokinetic cell and its protection system and electric automobile
Technical field
The utility model is related to field of batteries, in particular it relates to a kind of electrokinetic cell and its protection system and dynamic including this The electric automobile of power battery.
Background technology
Battery plays an important role as energy-storage units in all trades and professions, and for example electrokinetic cell is widely used in new-energy automobile Deng field, wherein in the battery bag of electrokinetic cell can have by multiple cells it is in series or in parallel with each other into battery modules with Realize the work of discharge and recharge.Wherein, electrokinetic cell generally monitors electricity in charge and discharge process by BMS (battery management system) The change calculations charging state of pressure and electric current.If voltage sample goes wrong, it is possible to cause over-charging of battery, especially for three For first system, the danger for reaching and cells burst blast more occurring to a certain degree is such as overcharged.
Existing technical scheme：Monitoring to the voltage and current of battery, by Current integrating method and open circuit voltage method meter Battery electric quantity is calculated, and is managed with this charge and discharge for controlling battery.But deficiency is there is also, such as battery voltage sampling or electric current are adopted Sample fails, or software failure, and causing battery to charge for a long time cannot control, particularly in the case where charging pile charges, When charging pile and battery manager communication failures, overcharge uncontrollable, over-charging of battery to a certain extent, can cause battery blow-up very It is extremely on fire from explosion.
Utility model content
The purpose of this utility model is to provide a kind of electrokinetic cell protection system, and the system can in time disconnect discharge and recharge electricity So as to avoid, battery explosion etc. is dangerous to be occurred on road.
The purpose of this utility model is also resided in and provides a kind of electrokinetic cell and the electric automobile using the electrokinetic cell.
To achieve these goals, the utility model provides a kind of electrokinetic cell protection system, and the protection system includes control Device processed, connecting and disconnecting of the circuit device and the gas-detecting device in electrokinetic cell；The gas-detecting device, in sensing Detect the fuel gas in the electrokinetic cell and the signal of detection fed back into the control device during mechanism's unlatching of air pressure, The control device, for being determined whether to control the connecting and disconnecting of the circuit device to cut off the power electric according to the signal of the detection The charge-discharge circuit in pond.
Alternatively, the protection system also includes the warning device controlled by the control device.
Alternatively, the gas-detecting device is gas sensor.
Alternatively, the fuel gas is H2、CO、CH4、C2H4、C2H6In one or more.
Alternatively, the control device includes microcontroller, host computer main control chip and control module, wherein：It is described micro- Controller, is processed for the signal to the detection, and result is transferred into the host computer main control chip；It is described Control module, for receiving the control instruction that the microcontroller or the host computer main control chip send, with based on the control The charge-discharge circuit that system instructs to control the connecting and disconnecting of the circuit device to cut off the electrokinetic cell.
Alternatively, the connecting and disconnecting of the circuit device includes the relay in the charge-discharge circuit.
Alternatively, the electrokinetic cell also includes warning device, in the microcontroller or the host computer master control Alarmed under the control of chip.
The utility model also provides a kind of electrokinetic cell, and the electrokinetic cell includes inclusion and is contained in many in the inclusion Individual cell, the electrokinetic cell is also included in inclusion for detecting fuel gas when the mechanism of induction air pressure opens Gas-detecting device.
Alternatively, the mechanism of the induction air pressure is provided with cell described at least one, the induction air pressure Mechanism is included in the current interrupt device of the lower cut-out charge-discharge circuit of the cell internal gas pressure effect, and described Current interrupt device can in the switched off state enable that the gas in the shell of the cell leaks.
Alternatively, the gas-detecting device is set adjacent to the current interrupt device.
Alternatively, the current interrupt device has electric-conductor and the flip piece electrically connected with the electric-conductor, and described Flip piece can disconnect under gas pressure with the electric-conductor and electrically connect.
Alternatively, the current interrupt device also has covering, and it is described outer to cause that stomata is formed with the covering Gas in shell can leak after the flip piece and the electric-conductor disconnect electrical connection.
Alternatively, the mechanism of the induction air pressure is provided with cell described at least one, the induction air pressure Mechanism includes to be released under the cell internal gas pressure effect explosion-proof valve of gas.
Alternatively, the gas-detecting device is set adjacent to the explosion-proof valve.
Alternatively, the fuel gas is H2、CO、CH4、C2H4、C2H6In one or more.
The utility model also provides a kind of electrokinetic cell, and the electrokinetic cell includes inclusion and is contained in many in the inclusion Individual cell, the electrokinetic cell also includes the electrokinetic cell protection system that the utility model is provided.
The utility model also provides a kind of electric automobile, and the electric automobile is provided with the power electric of the utility model offer Pond.
By above-mentioned technical proposal, when battery occurs dangerous, fuel gas can be produced in battery, by detecting that this is flammable Gas can learn that battery is in the hole, therefore can carry out auto-cutout to battery automatically and protect battery, it is to avoid electricity Pond overcharge or short circuit blast etc. danger.
Other feature and advantage of the present utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is further understood to of the present utility model for providing, and constitutes a part for specification, and following Specific embodiment be used to explain the utility model together, but do not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the decomposed schematic perspective view of electrokinetic cell in the utility model first embodiment；
Fig. 2 is the overlooking the structure diagram of two neighboring cell in the utility model first embodiment；
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 the utility model first embodiment；
Fig. 5 is the decomposition texture schematic diagram of flip piece and electric-conductor in the utility model first embodiment；
Fig. 6 is that the sectional structure in the utility model first embodiment under flip piece and electric-conductor confined state is illustrated Figure；
Fig. 7 is the overlooking the structure diagram of electric-conductor in the utility model first embodiment；
Fig. 8 is the cross section structure diagram of the pole according to the utility model one embodiment and ceramic ring；
Fig. 9 is the dimensional structure diagram of the pole of embodiment offer in Fig. 8；
Figure 10 is the cross section structure diagram of pole and another embodiment of ceramic ring in the utility model first embodiment；
Figure 11 is the dimensional structure diagram of the pole with ceramic ring of embodiment offer in Figure 10；
Figure 12 is the structural representation of two neighboring another embodiment of cell in the utility model first embodiment；
Figure 13 is the dimensional structure diagram of electrokinetic cell in the utility model second embodiment；
Figure 14 is the dimensional structure diagram of cell in the utility model second embodiment；
Figure 15 is the exploded perspective structural representation of cell in Figure 14；
Figure 16 is the exploded perspective structural representation of flip piece and electric-conductor in Figure 15；
Figure 17 is the broken section structural representation of cell in Figure 14；
Figure 18 is the broken section structural representation of cell in the implementation method of the utility model the 3rd；
Figure 19 is the theory diagram of the control system that the utility model preferred embodiment is provided；
Figure 20 is a kind of decomposition texture schematic diagram of the cell of embodiment of the utility model；
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 the implementation method of the utility model the 4th；
Figure 23 is the structural representation of current interrupt device in the implementation method of the utility model the 4th；
Figure 24 is the broken section structural representation of cell in the implementation method of the utility model the 5th；
Figure 25-Figure 27 is the schematic block diagram of the electrokinetic cell protection system according to the utility model embodiment；
Figure 28 shows the exemplary circuit diagram of gas-detecting device；
Figure 29 shows the exemplary circuit diagram of control module.
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
In the utility model, in the case where opposite explanation is not made, the noun of locality for using such as " upper and lower, left and right " is generally It is to be defined on the basis of the page of respective drawings, " inside and outside " refers to the inner and outer of corresponding component profile.
As shown in Fig. 1 to Figure 29, the utility model provides current interrupt device, cell, battery modules, power electric Pond and the technical scheme of electric automobile.Wherein current interrupt device is set in single cells, and multiple cells are by series connection Or formation battery modules in parallel, it is possible to insert in battery bag and form electrokinetic cell.Additionally, in addition to electrokinetic cell field, this The various technical schemes provided in utility model can also be widely used in other field of batteries.Specifically, this practicality is new Type introduces involved cell 100,1100,2100,3100,4100 by the first to the 5th implementation method, is directed to electricity Interruption means 200,1200,3200,4200 and explosion-proof valve 2200 are flowed, the utility model further relates to a kind of electrokinetic cell guarantor in addition Protecting system.Each implementation method 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 implementation method of the utility model, including it is many Individual cell 100,1100,2100,3100,4100, wherein, cell can include shell, the electricity being contained in shell Electrode terminal 101,1101,2101,3101,4101 that core is electrically connected with the battery core and the cover plate 102 of package casing, 1102, 2102nd, 3102,4102, wherein electrode terminal is set on the cover board, for completing the input and output of electric current.Wherein, monomer Include current interrupt device 200,1200,3200,4200 or explosion-proof valve 2200, the current interrupt device or explosion-proof in battery Valve is electrically connected with electrode terminal, therefore the effect for passing through current interrupt device, can with the input of the electric current of coordination electrode terminal and Output.I.e. current interrupt device or explosion-proof valve are in single cells the state of battery core conducting under conventional sense, now electrode Terminal can be normally carried out the input and output of electric current, to complete the charge/discharge operation of cell, and under precarious position, example Occur overcharging such as battery or during short circuit, current interrupt device or explosion-proof valve can interrupt electric current input and the electric current of electrode terminal Output, the problems such as overcharging or be short-circuit so as to avoid battery from occurring.Accordingly, as important safety measure, current interrupt device Reliability is most important, that is, need the current interrupt device can be with quick response.In addition, in each implementation method, wherein in electric current Disconnected device or explosion-proof valve can also be fixed relative to cover plate, i.e., current interrupt device or explosion-proof valve can be directly anchored to cover plate On, it is also possible to be fixed on arbitrarily be connected with cover plate or with the relatively-stationary part of cover plate on, such as installed in being arranged on cover plate Electrode terminal on.
In the utility model, current interrupt device or explosion-proof valve in each implementation method are the machinery knot of induction air pressure Structure, specifically, the enclosure gas connection of current interrupt device and cell and being disconnected under gas pressure is flowed through Electric current.Can specifically be connected come the transmission of interruptive current by the part of breaking inner, so as to cut off filling for battery in time Electric discharge.The air pressure source for wherein being utilized is：Occur overcharging when such as battery or during the precarious position such as short circuit, inside battery can be produced Angry body then causes that the air pressure of enclosure is raised, or causes battery temperature liter when exception occurs in use in battery It is high and cause that 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 first embodiment of Fig. 1 to Figure 12 as an example, such as Fig. 3-6, shown in Fig. 8 and Figure 10, the current interrupt device 200 have electric-conductor 201 and the flip piece 202 electrically connected with the electric-conductor 201, and flip piece 202 can with electric-conductor 201 Electrical connection is disconnected under gas pressure, wherein in the different embodiments in the utility model, the mode for disconnecting electrical connection can be with Difference, solder joint therebetween wherein can be the tie point disconnection between electric-conductor and flip piece, for example, be pulled to realize The disconnection of electrical connection, alternatively, it is also possible to itself disconnection in the two at least one, for example, processes by corresponding component Weak indentation realizes the disconnection of this body structure, so as to realize the disconnection of electrical connection.That is, realize in the utility model in air pressure Effect is lower to be disconnected mechanical structure to cut off the purpose of the transmission of electric current.
So, by taking first embodiment as an example, when overcharging or being short-circuit occur in such as battery, inside battery can produce gas Then air pressure is raised, and now under certain gas pressure, flip piece 202 disconnects electricity by rotary movement with electric-conductor 201 Connection, so as to interrupt the circuit in electrode terminal 101 and the external world, stops the charging of battery, so as to avoid the air pressure of inside battery after Height of continuing rising, it is ensured that the safety of battery.
In the present embodiment, electrode terminal 101 includes the pole 104 electrically connected with battery core, such as by interior leading-out piece It is connected with battery core, wherein pole 104 is passed through from cover plate 102 and drawn from shell with by electric current.Wherein, in present embodiment In, current interrupt device 200 can be arranged on pole 104.So inside battery directly can be experienced by pole 104 Air pressure, sensitivity is high, can avoid separately being attached current interrupt device 200 and electrode terminal in addition, convenient processing.
Wherein, due in the field of such as electrokinetic cell, it is necessary to the electric current for passing through is larger, it is therefore desirable to ensure electric-conductor 201 and flip piece 202 welding structure stabilization, it is to avoid high current fuse welding structure.So, in the present embodiment, such as Fig. 5 With shown in Fig. 6, flip piece 202 is connected with electric-conductor 201 by boss welding structure, the boss welding structure include boss 203, Accommodate the connecting hole 204 and the annular solder joint 217 between the boss 203 and connecting hole 204 of the boss 203.That is boss One of 203 and connecting hole 204 are located on flip piece 202, and another kind is located on electric-conductor 201.Therefore annular solder joint is ensured 217 can stably will be received in the firm welding of boss 203 in connecting hole 204, and can increase the circulation area of electric current Ensure passing through for high current.Specifically, as a kind of embodiment, boss 203 can be formed on electric-conductor 201, connecting hole 204 Can be formed on flip piece 202, more specifically, flip piece 202 is formed as the first laminated structure, shape in first laminated structure Into there is connecting hole 204, electric-conductor 201 is formed as the second laminated structure, and boss 203 is formed with second laminated structure.At it In his implementation method, it is also possible to which boss 203 is arranged on flip piece 202, connecting hole 204 is arranged on electric-conductor 201.In addition In some modes, flip piece 202 and electric-conductor 201 can also be welded using modes such as laser fuU penetration weldings.
Wherein, in the present embodiment, realize that the mode for disconnecting electrical connection can be by indentation between flip piece and electric-conductor Realize, i.e., process weak point of the intensity less than other regions in appropriate section, wherein in order to complete electric-conductor and flip piece It is fully disconnected, indentation is usually the tie point around electric-conductor and flip piece, such as above-mentioned welded loop configuration of boss. So as to the disconnection disconnected to realize electrically connecting by electric-conductor or flip piece in itself, wherein indentation can be formed on flip piece Can also be formed on electric-conductor, in the present embodiment, indentation 205 is formed with electric-conductor 201, the indentation 205 around with In the tie point of connection flip piece 202, i.e., the annular indentation around boss 203 is set in electric-conductor 201.So, when in battery When the air pressure in portion rises, under the influence of air pressure, indentation 205 can be promoted to be pulled off so that be scored 205 around it is convex The part of platform 203 can depart from electric-conductor 201 with flip piece 202, 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 by gas When pressure is acted on, because the curvature of profile is different, the larger region of curvature is more easy to concentrated stress and stress is larger, so can be first Tear initiation, so as to increase the sensitivity that indentation 205 is pulled off.Further, in the present embodiment, boss 203 is circle, and And the center of circle of the indentation 205 of ellipse is staggered with the center of circle of boss 203 along the oval long axis direction.Can so cause ellipse The region unbalance stress at circular major axis two ends, consequently facilitating breaking indentation 205 from partial points, and then lifts the spirit of indentation 205 Sensitivity.
Furthermore it is also possible to set electric-conductor flip piece 202 be coaxially disposed with electrode terminal 101, electric-conductor 201 is relative to electricity The axis of extreme son 101 is obliquely installed.So, can allow that the indentation of lower position is pulled off first, so as to increase quarter The sensitivity that trace 205 is pulled off.Further, when indentation 205 is for ellipse, the major axis and electric-conductor of ellipse can be designed Axis be obliquely installed, also inclined with the axis of pole when electric-conductor is arranged on pole.Consequently facilitating the song of major axis end The larger region of rate is torn first, so as to ensure that indentation 205 can normally be broken when needed, it is ensured that current interrupt device 200 normal work.
In addition, in order to be further ensured that indentation 205 is pulled off, can also design and opened on indentation 205 as shown in Figure 7 It is provided with decrease hole 206.So that indentation 205 is easy to be pulled off from the decrease hole 206, the size in decrease hole 206 therein And number can set according to actual conditions.Preferably, hole 206 is weakened for multiple and along the interval setting of indentation 205.Except subtracting Outside weak effect, when indentation is designed on electric-conductor 201, the decrease hole 206 is also used as air guide and is used so that in battery The gas in portion can by the decrease hole 206 by gas pressure on flip piece 202.
Wherein, as shown in Fig. 3, Fig. 8 and Figure 10, when current interrupt device 200 is arranged on pole 104, electric-conductor 201 It is connected on the outer end end face of pole 104, the outer peripheral edge of flip piece 202 is fixed relative to cover plate 102.So, in gas pressure Under, using the outer peripheral edge of flip piece 202 as the strong point, the indentation 205 being formed on electric-conductor 201 can be pulled off.In addition, being Enable that flip piece 202 is subject to gas pressure, the outer peripheral edge of flip piece can be sealed, for example with welding manner sealing Connection on the cover board, indentation 205 is broken to allow air pressure inside to exert a force flip piece.Wherein herein and similar description Middle outer end, the inner are defined relative to shell along the axial direction of pole, and relative to " inside and outside " of ring-shaped article, it is such as outer Periphery is then radially to be defined relative to the center of the ring-shaped article.
In order to ensure electric-conductor 201 and pole 104 in the case of fixation, indentation 205 thereon can also be pulled off, excellent Selection of land, is formed with receiving hole 218 on the outer end end face of the pole 104, the outer peripheral edge of electric-conductor 201 is fixed on the interior of the receiving hole On wall.So, electric-conductor 201 can stablize fixation by annular profile, and region inside indentation 205 not with pole 104 there is connection so as to be pulled off under external force, such as direct pressure effect of pulling force or gas of flip piece 202.
In the utility model, current interrupt device 200 has various with the mode of inside battery gas connection, in this implementation In mode, the air guide duct of connection enclosure and current interrupt device 200 is formed with pole 104.So as to directly by pole The internal structure of post 104 applies air pressure to current interrupt device.So that structure is simpler.
Wherein, as shown in Figure 8 and Figure 9, above-mentioned air guide duct includes two kinds of gas ports 103 in the present embodiment, its In the first gas port 103 be used for connect above-mentioned receiving hole 218 and enclosure, i.e., directly pressed to electric-conductor 201 and rushed Disconnected indentation 205.That is, air guide duct includes the gas port 103 for connecting above-mentioned receiving hole 218 and enclosure.Second Gas port 103 is used to connect flip piece 202 and enclosure, and indentation 205 is broken so as to be pressed to flip piece.Wherein in order that The stress improved efficiency of flip piece 202 is obtained, the gas port 103 can be the multiple around receiving hole.Therefore, in two kinds of gas ports Under 103 collective effect, 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, to cause electrode terminal structure It is firm.Wherein, the outer end periphery of pole 104 has radial direction boss 105, and the radial direction boss 105 is fixedly connected on cover plate 102, can To process second gas port 103 thereon so that gas flow to flip piece 202.Additionally, in the present embodiment, the A kind of gas port 103 is axially formed in pole 104.That is, the gas port 103 on radial direction boss 105 is for upset Part 202 presses, 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, at this The radial direction boss 105 and pole body of the pole 104 in utility model embodiment have been respectively formed on gas port 103, wherein pole The first gas port 103 on body is connected with the receiving hole 218 on end face, and number is four and circumferentially sets at equal intervals Put.In other embodiments, the number of the first gas port 103 can also be other quantity, and the utility model is not limited this System.
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 is that cover plate fixes company Need to be insulated with cover plate while connecing, therefore, pole 104 is fixedly connected on the ceramic ring 207 for being sealedly attached to cover plate 102, For example it is attached by Ceramic brazing.So, compared to the insulation of the realizations such as plastics, rubber, reliability and weatherability are stronger, no The robust seal connection of current interrupt device can only be realized, additionally it is possible to realize the insulation of the two.Specifically, pole 104 is outer There is support to connect the radial support 208 of the radial direction boss 105 for the inner edge that end periphery has radial direction boss 105, ceramic ring 207, Wherein radial direction boss 105 can be embedded in ceramic ring 207 and be connected with radial support 208, i.e. the thickness of radial support 208 compared with The thin stepped ramp type receiving space to be formed for the insertion of pole 104.
As shown in figure 11, in another embodiment of present embodiment, different from above by opening up air guide on pole The ventilating mode in hole 103, radial direction boss 105 and radial support 208 are respectively the multiple of circumferentially spaced setting, i.e. radial direction boss 105 is multiple and circumferentially spaced setting, and radial support 208 is also multiple and circumferentially spaced setting, and multiple radial convexes Platform and multiple radial supports are corresponded.So, can by between adjacent radial boss 105 and radial support 208 between It is spaced to realize ventilation, structure is simpler ingenious, easy to process, without additionally opening up air guide duct on pole 104, so that The region that pole 104 assembles electric-conductor 201 is not interfered with, the size of electric-conductor 201 can be maximized, so as to increase indentation chi It is very little and ensure the sensitivity broken.In this embodiment, radial direction boss 104 is three for being equally spaced, steady to take into account connection Qualitative and gas permeability.In other embodiments, the number of radial direction boss can also be other quantity, such as four or more.
Wherein in both embodiments, the outer face of ceramic ring 207 is all formed as the ladder knot with inner ring and outer ring Structure, the insertion of pole 104 is connected on inner ring.The difference is that, in the embodiment of monoblock type radial direction boss 105, inner ring is formed It is overall ring-type radial support, and in the embodiment of split type radial direction boss, inner ring then forms above-mentioned multiple intervals and sets The radial support 208 put, so that overall structure is compacter, connection is more consolidated.
In the present embodiment, in order to set up current flow path with the external world, it is preferable that on the outer face of ceramic ring 207 Conducting ring 216 is sealedly connected with, is specifically connected on outer ring, the outer peripheral edge of flip piece 202 is fixedly connected on the conducting ring 216 On, i.e., flip piece 202 is connected on ceramic ring 207 by conducting ring, and flip piece and the external world can be set up electric current and returned by conducting ring Road.Wherein in order to avoid after breaking indentation conducting ring still electrically connected with pole, and lose the effect of current interruptions.Preferably, Conducting ring 216 is sealedly connected on the outer ring of ceramic ring and is insulated with pole, i.e., pole 104 and conducting ring 216 pass through ceramic ring Insulation.In addition, conducting ring 216 be sealedly connected on ceramic ring can so that the outer peripheral edge of flip piece is sealed 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 with L-type seam, Its inner face is used to connect the outer ring of ceramic ring.The outer peripheral edge insertion of flip piece 202 is supported in the L-type seam, and this is outer Periphery is sealedly connected on the L-type seam by the block 210 that cover sets the flip piece 202.So as to realize the steady of flip piece 202 While fixed sealing is assembled, current interrupt device 200 can be played a protective role.In addition, conducting ring 216 can by with Block is connected or the electrode leading-out sheet that is joined directly together sets up current loop with the external world, for example with adjacent cell 100 it Between, or can be connected by electrode leading-out sheet between adjacent cell module.
Ceramic ring 207 and cover plate 102 are tightly connected for convenience, it is preferable that be tightly connected on the inner face of ceramic ring 207 There are transition rings 209, the transition rings 209 can be connected with ceramic ring 207 by Ceramic brazing, and the transition rings 209 sealing connects It is connected on cover plate 102.Wherein transition rings 209 are it is also possible that ceramic ring 207 and the interval setting of cover plate 102.Due to ceramic ring 207 Do not assembled directly with cover plate 102, influenceing for the high temperature produced when can avoid cover plate 102 by ceramic soldering ring in addition will not Area to ceramic ring 207 causes limitation because needs and cover plate 102 are directly assembled, and is not required to carry out ceramic ring 207 Special design, manufactures and easy to assembly.
Wherein, as shown in Fig. 3, Fig. 8 and Figure 10, it is preferable that transition rings 209 have inner ring and the outer ring for forming Z-type structure, 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, the inner ring insertion support of transition rings In ledge structure.I.e. in fig. 8, inner ring is located in lower section and embedded through hole, so as to increase the contact area of the two ensure to connect Connect stabilization.
Therefore, in the present embodiment, in order to realize the work of current interrupt device, the outer peripheral edge of flip piece 202 needs Sealed, ceramic ring 207 is specifically sealedly connected between the outer peripheral edge of flip piece and cover plate, so that by the close of ceramic structure Envelope realizes the stabilization of current interrupt device and reliable work.In this ceramic seal structure, in particular by cover plate and mistake Each self sealss crossed between ring, transition rings and ceramic ring, ceramic ring and conducting ring and conducting ring and flip piece so that in shell The air pressure in portion can useful effect in current interrupt device so that current interrupt device reliable operation.When being assembled, In order to ensure the sealing of current interrupt device, ceramic ring 207 is respectively between conducting ring 216, pole 104 and transition rings 209 It is tightly connected by Ceramic brazing.Then can again pass through Laser Welding first by this one independent assembly of composition Transition rings 209 are assembled on cover plate 102, it is easy to assembly without directly ceramic ring is soldered on cover plate.In addition, electric-conductor 201 can be connected with pole 104 using Laser Welding, and flip piece and electric-conductor can be welded using laser fuU penetration welding or above-mentioned boss The welding manners such as binding structure are connected, and block 210 can be connected with conducting ring by Laser Welding.Additionally, pole 104 can be with battery core Lead-out tablet be laser welded, so as to complete the assembling and work of overall current interruption means.
The above-mentioned main structure for describing the current interrupt device 200 in first embodiment, is explained below first real Apply the arrangement of the current interrupt device 200 in mode.
In order to ensure that the normal of the driving current interrupt device 200 of above-mentioned air pressure timely works, can be by electric current The size design of disconnected device 200 it is larger, so in the case of air pressure is immutable, increased by increasing lifting surface area and broken Power.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 interrupt device 200 extends radially out cover plate 102, so as to increase size.Now in battery modules, cell 100 It is multiple, between neighboring unit cell 100, in order to avoid the current interrupt device 200 extended hinders neighboring unit cell Electrode terminal on 100, it is preferable that current interrupt device 200 on the bearing of trend of short transverse and/or cover plate with it is adjacent Electrode terminal mutually staggers.Cover plate 102 can be so made full use of to be not provided with the region of electrode terminal 101 so that the electricity of protrusion Stream interruption means will not interfere with the structure on adjacent cover plate, fully save the space in battery bag, improve the energy in inclusion Density.Wherein it should be noted that the utility model herein and it is following between neighboring unit cell, current interrupt device With adjacent electrode terminal, or between electrode terminal each means different monomers battery with the implication of adjacent electrode terminal it is adjacent The connection of feature, rather than the connection of the adjacent feature on same cell.
In the present embodiment, current interrupt device 200 is mutual on cover plate bearing of trend with adjacent electrode terminal 101 Stagger.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 interrupt device 200 and phase Connected by L-type connector 214 between adjacent electrode terminal, the L-type connector 214 has covering part 211 and lead division 212, covers The covering of cap 211 is connected in current interrupt device 200, and lead division 212 extends to adjacent electrode terminal with adjacent thereto.Its In, the inflection structure of L-type connector as described in Figure 1 can be extended to adjacent electrode terminal in the extension side of cover plate first Then alignment upwards re-extends into the electrode terminal, and in other embodiments, L-type connector can also extend to adjacent first On cover plate, electrode terminal is then re-extended into, so as to realize the electrical connection of the two.
As another embodiment, as shown in Fig. 2 between adjacent cell 100, current interrupt device 200 is wrapped The block 210 of covering flip piece 202 is included, the block 210 is extended to along cover plate 102 aligns with adjacent electrode terminal, that is, have The covering part 211 and lead division 212 of straight line, and by linear I types connector 215 and adjacent electrode terminal phase Even.The I types connector 215 can be also used for connecting the electrode that current interrupt device 200 is not provided between other monomers battery 100 Terminal 101, so, by the block 210 of this shape, can cause that basic need to use this one kind even in integral battery door module Fitting.
Different from the above-mentioned implementation method shown in Fig. 2, as shown in figure 12, can also be by increasing the side of cell 100 Formula is adapted to larger current interrupt device.Specifically, between neighboring unit cell 100, it is provided with current interrupt device 200 The width of cell 100 be more than the width of the cell for being not provided with current interrupt device 200, and current interrupt device 200 extend close to the edge of the width of cover plate 102, so as to can equally realize the adaptation to current interrupt device 200.
Width additionally, due to corresponding cell is larger, current interrupt device can be caused non-bulging in cover plate, because This can cause that adjacent electrode terminal is mutually aligned.So can equally avoid extending the current interrupt device of cover plate 102 The other structures such as the welding structure on 200 pairs of adjacent cover plates 102 are impacted.And preferably, can cause that current interruptions are filled Put and be connected by linear I types connector 215 with adjacent electrode terminal.
In addition when in use, although increase the width of cell 100, battery core capacity but is increased, i.e. set The battery core capacity being equipped with the cell 100 of current interrupt device 200 and the cell 100 for being not provided with current interrupt device In battery core capacity it is identical, so as to the cell for avoiding there are different capabilities under same module, and avoid the shadow to BMS Ring.Wherein, because battery core capacity is identical, the remaining space of enclosure can be filled using dividing plate, i.e. be filled out around battery core Filled with dividing plate, to cause the assembling structure stabilization of battery core.Wherein consider the size of battery modules and the size of monomer, battery core Can be 1 with the ratio between the volume of dividing plate：1-2：1, wherein, dividing plate can be made up of the material of electrolyte resistance.
In addition, consider from current interruptions effect and cost and fit on, in multiple cells 100 of same module In, the quantity for setting the cell of current interrupt device 200 is no more than three；Preferably, current interrupt device is set The quantity of 200 cell is 3；Preferably, the cell for setting current interrupt device 200 is positioned at battery modules End and the cell of central part；Wherein, if battery modules include the n cell being arranged in order, battery modules End cell for battery modules the 1st cell and battery modules n-th cell；When n is odd number When, the cell of the central part of the battery modules is (n+1)/2 cell of battery modules；When n is even number When, the cell of the central part of the battery modules is the n-th/2 cell or (n+2)/2 list of battery modules Body battery, wherein n >=3.
Current interrupt device, the list provided according to the utility model first embodiment of Fig. 1 to Figure 12 are be provided Body battery, battery modules, in the case where the utility model design is not departed from, the feature in first embodiment is for example, boss welding knot Structure, oval indentation, ceramic ring etc. can apply with following other embodiments, with reference to Figure 13 to Figure 17 introductions The electrokinetic cell that the utility model second embodiment is provided.
As shown in Figure 13 and Figure 15, second embodiment of the present utility model provides a kind of cell 1100, the monomer Battery 1100 includes the electrode terminal 1101 and package casing that shell, the battery core being contained in shell are electrically connected with the battery core Cover plate 1102, the electrode terminal 1101 is arranged on cover plate 1102 input and output for electric current.The wherein monomer Battery 1100 also includes the current interrupt device 1200 connected with the internal gas of shell, with first according to Fig. 1 to Figure 12 in fact Apply unlike the mode being arranged in mode on electrode terminal, current interrupt device 1200 set on the cover board and with shell Internal gas are connected, and wherein the current interrupt device 1200 has electric-conductor 1201 and the upset electrically connected with the electric-conductor 1201 Part 1202, flip piece 1202 can disconnect under gas pressure with electric-conductor 1201 and electrically connect.That is, the current interrupt device 1200 Operation principle it is essentially identical with current interrupt device in Fig. 1 to Figure 12 first embodiments, be by experiencing single Air pressure in body battery realizes the upset of flip piece and disconnecting circuit.
Wherein as shown in figure 17, because current interrupt device 1200 is not arranged on electrode terminal, electric-conductor 1201 has The body 1299 that is connected with flip piece 1202 and from the body 1299 extend to electrode terminal 1101 and with the electrode terminal 1101 connected connecting portions 1298, thus by second embodiment in, current interrupt device 1200 is set on the cover board, this Sample can avoid increasing the height of electrode terminal 1101, close so as to increase battery capacity by using the length space of cover plate Degree.
As shown in Figure 15 to Figure 17, in the present embodiment, the body 1299 of electric-conductor 1201 and the inside gas of shell Body is connected and is formed with indentation 1205, and the indentation 1205 is set around for connecting the tie point of flip piece 1202.So as to The indentation is broken under enough gas pressures internally, so as to disconnect the electrical connection between flip piece and electric-conductor.Further, indentation Passage 1206 is provided with 1205.So, not only can enable that air pressure is applied to flip piece by passage 1206 On 1202, and pass through flip piece and apply pulling force to indentation, and can facilitate and break housing in the position of the passage 1206 1205, play a part of to lift the sensitivity of flip piece 1202, now indentation can also be arranged on flip piece.Wherein passage 1206 can be for multiple and along the interval setting of indentation 1205.Further for features such as indentation and passages, according to Fig. 1's to Figure 12 Feature in first embodiment may apply in present embodiment.In other embodiments, the body of electric-conductor With indentation can be respectively arranged with flip piece.So, when the air pressure of enclosure constantly rises, except breaking on electric-conductor Indentation comes outside interruptive current, can also continue to break the indentation on flip piece, and now the gas of inside battery can be from upset Outwards released at part, and avoid the air pressure in the shell of cell from continuing to increase.Furthermore it is also possible to the gas allowed in battery bag body Dependent sensor induction alarm or cut-out circuit.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, on flip piece Broken in the presence of enough the second air pressure in shell of indentation, and the second air pressure is more than the first air pressure.I.e. in electric-conductor our department Indentation intensity of the intensity less than the indentation on flip piece, can be broken by less first air pressure.Only when air pressure after Just continue to break the indentation on flip piece and pressure release when of continuing rising high.
In the present embodiment, the effect of enclosure air pressure, flip piece can be received in order to ensure flip piece 1202 1202 outer peripheral edge is tightly connected with electric-conductor 1201, to prevent gas from being leaked and pressure release from flip piece outer peripheral edge.Specifically, cover The passage with enclosure gas connection is offered on plate 1102, and be sealedly connected with cover plate around passage first Ceramic ring 1207, body 1299 is sealedly connected on first ceramic ring 1207, so that air pressure inside can be acted on Without leaking on body 1299.In addition to stabilization assembling flip piece 1202, the outer peripheral edge of flip piece 1202 is sealedly connected on On second ceramic ring 1296, and second ceramic ring is sealedly connected on electric-conductor 1201.Therefore by the second ceramic ring Insulation characterisitic, can either stably support the outer peripheral edge of the flip piece 1202 can also cause the outer of electric-conductor and flip piece 1202 Periphery is insulated by the second ceramic ring 1296, so can after flip piece 1202 and electric-conductor 1201 are broken by indentation 1205 Electric current connection is remained open, so as to play a part of current interruptions.
Specifically, as a kind of embodiment, as shown in Figure 16 and Figure 17, it is formed with the body 1299 of electric-conductor 1201 Around the annular boss 1297 of indentation 1205, so, by the structure of the annular boss 1297, can be used on the inside of its radial direction The features such as indentation 1205 are formed, and can cause that the back side recess sealing of the annular boss 1297 accommodates the first ceramic ring 1207, in addition, the outside of annular boss 1297 can be used for sealing is supported by the second ceramic ring 1296.So, the utility model By the unique texture of the electric-conductor described in Figure 16 and Figure 17 in second embodiment, current interrupt device 1200 is enabled to More convenient installation.
In addition, the first ceramic ring 1207 is sealedly connected on cover plate 1102 by transition rings 1209, and as shown in figure 17, the mistake Crossing ring 1209 has the connection main body and the flange ring for connecting the first ceramic ring 1207 of embedded passage inwall.The flange Ring is radially projecting from connection main body and is fitted with cover plate.So as to the stabilization for ensureing current interrupt device 200 is installed, without the One ceramic ring 1207 is directly connected with cover plate 1102.
In the present embodiment, connect for convenience, it is preferable that as shown in figure 17, 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 slot 1295, pole 1104 Penetrate in the slot 1295 and be welded to each other, so as to realize being stably connected with for the two.In addition, as shown in figure 15, current interruptions dress Putting 1200 includes the connector 1210 for being covered on flip piece 1202 and being electrically connected with the flip piece 1202, and the connector 1210 has The lead division 1293 for having the covering part 1294 of covering flip piece 1202 and extending from the covering part 1294.The wherein connector 1210 can be formed as with the identical structure of L-type connector 214 in the first embodiment according to Fig. 1 to Figure 12, that is, cover Portion and lead division are formed as L-type inflection structure.Consequently facilitating electric current is drawn out into adjacent electrode from current interrupt device 1200 Outside terminal or module.
Wherein in the battery modules that at least one cell is above-mentioned cell 1100, current interrupt device is along footpath To the cover plate is extended, so as to increase lifting surface area and increase pull-off force.Between neighboring unit cell, current interrupt device Mutually stagger on the bearing of trend of cover plate 1102 with adjacent electrode terminal, so as to avoid interference the structure on adjacent cover plate. In addition be the cell that is provided with current interrupt device 1200 according to the first embodiment identical of Fig. 1 to Figure 12 1100 quantity is no more than three.
The cell that the second embodiment of the utility model Figure 13 to Figure 17 is provided is above described, wherein mainly retouching The features different from the first embodiment of Fig. 1 to Figure 12 are stated, the feature of two implementation methods can in the case of reconcilable Mutually to replace, combine, the utility model is not repeated this.
With reference to Figure 18 introduce the implementation method of the utility model the 3rd offer cell 2100, should include shell, Electrode terminal 2101 and the cover plate 2102 of package casing that the battery core being contained in the shell is electrically connected with the battery core, electrode Terminal 2101 is arranged on cover plate 2102, and wherein cell includes the first electrode leading-out piece 2298 electrically connected with battery core, with And the second electrode leading-out piece 2297 electrically connected with electrode terminal 2101, the internal gas with shell are additionally provided with cover plate 2102 The explosion-proof valve 2200 of connection, the explosion-proof valve 2200 has connection first electrode leading-out piece 2298 and second electrode leading-out piece 2297 Flip piece 2202, i.e. two electrode leading-out pieces are connected by the flip piece 2202.
Wherein, the first indentation 2205 is formed with first electrode leading-out piece 2298 and/or second electrode leading-out piece 2297, should Disconnect interrupting first electrode leading-out piece 2298 and/or second electrode under the gas pressure that first indentation 2205 can be in shell The effect of the electric current on leading-out piece 2297, i.e. first indentation is to cause that setting its electrode leading-out piece disconnects so as to middle power-off The transmission of stream, therefore at least one of two electrode leading-out pieces are provided with the first indentation and are capable of achieving battery core and electrode terminal The disconnection of electrical connection, then causes that cell disconnects with the electric current transmission in the external world.In addition, being additionally provided with flip piece 2202 Two indentations 2299, disconnect with so that gas in shell is via turning under the gas pressure that second indentation 2299 can be in shell Turn part 2202 outwards to release, i.e. the effect of the second indentation is to ventilate, and can cause that internal gas leak upon opening, so as to keep away Exempting from the continuation rising of inside battery air pressure causes blast, to play explosion-proof.
Specifically, broken under the first gas pressure that the first indentation can be in shell, the second indentation can be in shell The second air pressure in the presence of break, and the second air pressure be more than the first air pressure.I.e. the intensity of the first indentation 2205 is less than second The indentation of indentation 2299, can be broken by less first air pressure.Only just continue to break second when air pressure continues and raises Indentation 2299 and pressure release.
As shown in figure 18, in the present embodiment, two electrode leading-out pieces can be lengthy motion picture structure, so in order to disconnected Electric current is opened, the first indentation 2205 extends to another lateral edges along the width of the chip architecture long from a lateral edges, so can be with Allow that chip architecture long is broken along the first indentation more in time.Wherein flip piece 2202 could be formed with ring-type outer wall, two Electrode leading-out piece can be fixedly connected on ring-type lateral wall, to realize that electric current is transmitted.Specifically, in the utility model, should The ring-type outer wall of flip piece can be formed for example, by the boss in boss welding structure, and flip piece is also formed with conical ring knot in addition Structure, the 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, the second quarter The circumference that trace can surround flip piece is formed as cyclic structure, is thoroughly disconnected with gas pressure, increases air venting efficiency. Specifically the second indentation may be formed in conical ring structure.In order that obtain flip piece effectively can be broken for the first quarter by gas pressure On the one hand trace and the second indentation, the outer peripheral edge of flip piece 2202 and the relatively-stationary insulated enclosure of the cover plate, can so keep away Exempt from gas just to be leaked in the case where the first indentation and the second indentation is not broken and cause that two indentations are ineffective.The opposing party Face, can avoid cover plate powered by connection of insulating.
In the present embodiment, electrode terminal 2101 include through cover plate pole, the pole by the second ceramic ring with The outside insulation of cover plate is connected, in order to set up current loop with the external world.It is by electrode tip between i.e. adjacent cell Sub is connected with each other to realize electric current transmission.Wherein by ceramic ring cover plate can be avoided powered.In addition, flip piece 2202 The first ceramic ring 2207 is sealedly connected between outer peripheral edge and cover plate, is equally played a part of to seal and is insulated.
In addition, for the ease of connection flip piece 2202, First Transition piece 2295, flip piece are fixedly connected with cover plate 2102 2202 periphery is fixedly connected with the second transition plate 2296, and First Transition piece and the second transition plate can be aluminium flake.First Transition Coaxially soldering is connected piece 2295 with the first ceramic ring 2207 with the second transition plate 2296.So, when being assembled, can be with head First two transition plates are welded on the first ceramic ring by brazing mode, are then carried out by two stators and other structures Welding, can so avoid high temperature for carrying out soldering and produce between the structures such as the first ceramic ring and cover plate etc., so that the side of assembling Just sealing, firm and insulation connection and by the first ceramic ring 2207 are realized, and cover plate 2102 can be prevented powered.
Specifically the transition plate 2296 of First Transition piece 2295 and second can be respectively cyclic structure to adapt to the first ceramics Two annular end faces of ring.Furthermore it is preferred that cover plate 2102 is formed with annular boss, First Transition piece 2295 is supported on the ring On shape boss, the inwall that the first ceramic ring is close to the annular boss extends towards the second transition plate 2296, so as to ceramic by first 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 flip piece 2202 tops, are in particular connected on the First Transition piece 2295 away from flip piece.Such diaphragm 2099 under normal circumstances Can play to the protective action inside explosion-proof valve 2200, and when needing explosion-proof, can be broken through by certain air pressure, such as the Two air pressure, so as to avoid influenceing the explosion-proof effect of explosion-proof valve.
In addition, being pulled off to realize the priority of two indentations in the utility model, the residual thickness of the first indentation and The ratio between residual thickness of two indentations is 1:3-1:1.2.Further it is 1:2-1:1.3.
Above describe the cell that the implementation method of the utility model the 3rd of Figure 18 is provided.With reference to Figure 22 and Tu 23 the 4th implementation methods that the utility model offer is provided.
4th implementation method of the present utility model provides a kind of cell 3100 and the battery using the cell Module.The cell 3100 includes shell, the battery core being contained in the shell, the cover plate 3102 of package casing and sets Electrode terminal 3101 on cover plate 3102, wherein, cell 3100 also includes the interior leading-out piece 3299 electrically connected with battery core And the current interrupt device 3200 between interior leading-out piece 3299 and electrode terminal 3101 is connected to, wherein, different from Fig. 1 to figure The mode of outer end on pole is arranged in 12 first embodiment, the current interrupt device 3200 in present embodiment is located at lid On the inside of plate 3102 and connected so that the electric current for flowing through can be disconnected under gas pressure with the internal gas of shell, wherein, electrode The adaptor 3298 extended radially outward from outer peripheral edge is connected with terminal 3101, electric current is connected with by the adaptor 3298 The outer peripheral edge of interruption means.
So, due to the adaptor 3298 extended radially outwards from the outer peripheral edge of electrode terminal so that with adaptor The connected current interrupt device of 3298 radial outsides, compared to the mode being directly connected with electrode terminal, what its area can be designed It is bigger, so that increase force area of the air pressure inside to current interrupt device, so as to be lifted in the case where air pressure is constant The stress of current interrupt device, and the sensitivity of motor current interruption means 3200, complete the cut-out of electric current in time.Wherein especially Be in battery applications of the present utility model in the big battery such as electrokinetic cell field, due to generally require transmit high current, therefore The size of increase adaptor and high current interruption means is all conducive to the transmission of high current.
In the present embodiment, adaptor 3298 is formed as cyclic structure, the inner peripheral and electrode terminal of the cyclic structure Outer peripheral edge be connected, outer peripheral edge is connected with the outer peripheral edge of current interrupt device, so as to play increase current interrupt device area Effect, in other embodiments, adaptor 3298 can also be radially extend and circumferentially spaced setting multiple connections The structure of post, can equally realize the effect of the area of increase current interrupt device.
In the present embodiment, in order to increase the firmness of adaptor and electrode terminal and current interrupt device, it is ensured that Electric current transmission stabilization.Preferably, the inner peripheral of the cyclic structure outer peripheral edge seam inner with the electrode terminal coordinates, tool Seam can be formed with the inner outer peripheral edge of electrode terminal body, and the inner peripheral of adaptor is embedded in the seam and phase Even, so that increase connection area increases electric current transmission efficiency while stable connection is ensured.The wherein interior outer end of electrode terminal Defined relative to shell along its axial direction, 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, that is, cause cyclic structure Itself be formed as the structure of ring cap, and current interrupt device coordinates with the inner side seam of the outer peripheral edge, so as to not only ensure to connect Connect firm increase electric current transmission efficiency and current interrupt device and electrode terminal can be spaced apart, so as to be current interrupt device Disconnection under gas pressure provides space.
In the present embodiment, interior leading-out piece 3299 includes the connection sheet (not shown) that is connected with battery core, the connection sheet from Battery core extends towards cover plate direction.Leading-out piece also includes being installed for accommodating the support slot of current interrupt device in addition, and From the connecting plate that the support slot extends towards rightabout, connecting plate is connected with cover plate insulation respectively, so as to avoid cover plate powered, Specifically, connecting plate can be formed as overall laminated structure, i.e. link slot with link slot includes two side walls and a bottom wall, two Individual side wall is connected with the connecting plate of both sides respectively.In addition, in order that current interrupt device and enclosure gas connection, can be with The air passing hole with enclosure gas connection is formed with the bottom wall for designing support slot.
In the present embodiment, in order to avoid cover plate is powered, interior leading-out piece 3299 is insulated by ceramic member 3296 and is connected to The inner side of cover plate 3102.Specifically, ceramic member 3296 can be formed as potsherd, and pass through transition plate 3294 and interior extraction respectively Part 3299 and cover plate are weldingly connected, i.e., transition plate 3294 is two panels, and the transition plate can be aluminium flake, respectively positioned at ceramic member 3296 Upper and lower surface, ceramic member 3296 is welded to connect by the transition plate 3294 positioned at the upper surface of ceramic member 3296 and cover plate 3102, Ceramic member 3296 is also welded to connect by the transition plate 3294 positioned at the lower surface of ceramic member 3296 and interior leading-out piece 3299 simultaneously, from And cause that being welded to connect between ceramic member 3296 and cover plate 3102 and interior leading-out piece 3299 is more easy to realize, and welding structure Stabilization.Can be wherein connected by Ceramic brazing between ceramic member 3296 and the transition plate 3294 of lower surface disposed thereon, be located at Can be connected by laser welding between the transition plate 3294 of the upper surface of ceramic member 3296 and cover plate 3102, positioned at ceramic member 3296 Can be connected by laser welding between the transition plate 3294 of lower surface and interior leading-out piece 3299.
In the present embodiment, current interrupt device 3200 has electric-conductor 3201 and is connected with phase with the electric-conductor 3201 The mutually flip piece 3202 of electrical connection, and flip piece 3202 can disconnect under gas pressure with electric-conductor 3201 and electrically connect, its Middle electric-conductor 3201 is connected on interior leading-out piece 3299 and is formed with the gas port 3213 with enclosure gas connection, specifically Ground, the insertion of electric-conductor 3201 is connected in the support slot of interior leading-out piece, and the air passing hole formed in such support slot can be with air guide The gas connection of hole 3213, so that flip piece 3202 can experience the internal gas pressure of shell, so that air pressure internally The electrical connection of flip piece 3202 and electric-conductor 3201 is disconnected under effect.Wherein, the outer peripheral edge of flip piece 3202 and adaptor 3298 outer peripheral edge is connected to set up electric current access path.
Wherein, in the present embodiment, as a kind of mode for disconnecting electrical connection, indentation is formed with electric-conductor 3201, The indentation is set around for connecting the tie point of flip piece 3202.So, internally in the presence of air pressure, the indentation can be drawn The disconnected electrical connection so as to disconnect electric-conductor and flip piece.In other embodiments, indentation can also be formed on flip piece or Person is 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 Supported by insulating part 3295 and be connected on electric-conductor 3201 and/or interior leading-out piece 3299, so as to be realized by insulating part 3295 Assembling to flip piece 3202, the outer peripheral edge and interior leading-out piece 3299 and electric-conductor that so ensure that flip piece is insulated, so that Avoiding flip piece can also be electrically connected in outer peripheral edge after being electrically connected with electric-conductor disconnection under gas pressure with electric-conductor or interior leading-out piece Connect.
Specifically, insulating part can be the ring-type insulating parts such as ceramic ring, sealing ring, and wherein insulating part has three kinds of connection sides Formula, first is supported on electric-conductor 3201 for sealing, is in particular supported on electric-conductor 3201 around the region for being pulled off region, Second to be supported on interior leading-out piece 3299, is in particular supported on interior leading-out piece 3299 on the region of electric-conductor 3201, 3rd to be supported on interior leading-out piece 3299 and electric-conductor 3201 simultaneously, i.e., as shown in figure 23, insulating part is supported on interior leading-out piece 3299 and electric-conductor 3201 join domain on.
Wherein, stabilization is transmitted in order to ensure the electric current of electric-conductor and flip piece, is especially adapted for use in the power electric of high current Pond, the first embodiment with Fig. 1 to Figure 12 is similar, in the case where electric-conductor sets indentation 3205, as shown in figure 23, upset Part 3202 and electric-conductor 3201 by by indentation 3205 around boss welding structure be connected, the boss welding structure includes boss 3203rd, the connecting hole 3204 and the annular solder joint between the boss 3203 and connecting hole 3204 of the boss 3203 are accommodated 3217, so as to ensure effectively passing through for high current.Wherein specifically, as shown in figure 23, with the first embodiment of Fig. 1 to Figure 12 Difference shown in middle Fig. 6, boss 3203 is formed on flip piece 3202, and connecting hole 3204 is formed on electric-conductor 3201.This Outward, it is also possible to which the first embodiment with Fig. 6 is identical, boss is formed on electric-conductor 3201, and connecting hole 3204 forms flip piece On.
In addition, as shown in figure 22, used as a kind of embodiment, electric-conductor 3201 can be formed as cap-like structure, the hat shape knot Structure includes the cap body being connected with flip piece and the brim of a hat around the cap body, above-mentioned gas port is wherein formed with the brim of a hat and is drawn with interior Go out part to be connected, and cap body is protruded towards flip piece, flip piece is formed as laminated structure, and the outer peripheral edge of the laminated structure with Above-mentioned insulating part 3295 is connected between the brim of a hat.So that the compact conformation of the current interrupt device that the utility model is provided, Assembling stabilization.
In the present embodiment, in order to set up current loop with the external world, it is preferable that electrode terminal 3101 is included through cover plate Pole 3104, the pole is connected by the insulation of ceramic ring 3293 and cover plate, so as to avoid cover plate powered, adaptor 3298 in addition It is connected on the inner of the pole and sets up current loop with the external world with by exposing the part outside cover plate.Specifically, ceramic ring 3293 are sealedly connected on the outer surface of cover plate, and are connected with the sealing of pole 3104, to ensure the sealing effectiveness inside cover plate.Its In, axially through being formed with stomata 3292 on pole.So, it is pressurized in current interrupt device 3200 and interrupts the process of electrical connection In will not be influenceed by closed chamber air pressure in cover plate but pressure difference can be set up with ambient atmosphere so that flip piece 3202 act in the presence of inside and outside differential pressure and break indentation 3205.
Above describe the cell that the utility model is provided according to the 4th implementation method of Figure 22 and Figure 23.Tie below Close the 5th implementation method that Figure 24 introduces the utility model offer.
5th implementation method of the present utility model provides a kind of cell 4100 and the battery using the cell Module, the wherein cell 4100 include the electrode terminal that shell, the battery core being contained in shell are electrically connected with the battery core 4101 and the cover plate 4102 of package casing, electrode terminal 4101 is arranged on cover plate 4102, wherein, electrode terminal include through Cover plate 4102 and the pole 4104 electrically connected by interior leading-out piece 4196 with battery core, cell also include being arranged on pole 4104 On current interrupt device 4200, the current interrupt device 4200 have fixed relative to cover plate 4102 and with the inside gas of shell The flip piece 4202 of body connection, and flip piece 4202 is connected with the outer face of pole 4104 by tie point, the tie point energy It is enough to be disconnected under gas pressure.So, the operation principle of current interrupt device is directly will by air pressure in present embodiment The tie point of flip piece 4202 and pole 4104 is pulled open, 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.For example pass through point The solder joint 4199 being soldered, additionally other can weld means realization by Laser Welding etc..Therefore, can be with present embodiment Reasonably implemented by the fusion penetration of butt welding point, molten wide, so as to realize the control to breaking pressure.
In the present embodiment, similar to the first embodiment according to Fig. 1 to Figure 12, be formed with pole 4104 with outward The gas port 4103 of the inside connection of shell, such that it is able to easily air pressure inside is directed in current interrupt device.In addition, being The reliability of further motor current interruption means, it is preferable that indentation 4205 is formed with flip piece 4202, the indentation 4205 Set around tie point.So, except it is above-mentioned break tie point in addition to, in can also realizing electric current by breaking indentation 4205 It is disconnected.In the present embodiment, tie point and indentation to break air pressure different and with priority, specifically, tie point can be Broken under the first gas pressure in shell, 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 be used as the back-up measures of tie point, it is ensured that the safety of battery.It is highly preferred that upset Block 4210 is coated with part 4202, stomata 4197 is formed with the block 4210.So, after indentation 4205 is pulled off, outward Gas inside shell can be discharged from stomata 4197 again by flip piece, then realize the pressure release of inside battery, be prevented in battery Portion explodes, and this principle is similar with the explosion-proof valve of the 3rd implementation method of Figure 18.
In the present embodiment, the first ceramic ring 4207 is connected between pole 4104 and cover plate 4102, so that by pottery Porcelain structure realizes that the stabilization of pole is installed while avoiding cover plate 4102 powered.In addition, the periphery of pole 4104 and flip piece The second ceramic ring 4198 is sealedly connected between edge, such that it is able to pass through the ceramic structure realize flip piece outer peripheral edge it is close Envelope, it is ensured that interior gas effectively can press to flip piece, while ensureing to be insulated between pole and the outer peripheral edge of flip piece, keeps away The flip piece for exempting to break after tie point or indentation remains able to conduction.
Specifically as a kind of embodiment, pole 4104 has the annular boss 4297 being formed with around tie point, so that By the design feature of the annular boss, the back side recess sealing of the annular boss 4297 accommodates the first ceramic ring 4207, First ceramic ring 4207 is sealedly connected on cover plate 4102, and the radial outside sealing of annular boss 4297 is supported by the second ceramics Ring 4198, the outer peripheral edge of second ceramic ring 4198 sealing support flip piece 4202.So that the structure of overall current interruption means It is compacter, and assemble stabilization.For the ease of assembling, the first ceramic ring 4207 is sealedly connected on cover plate by transition rings 4209 On 4102.Ceramic brazing specifically can be carried out with the first ceramic ring 4207 by transition rings and be tightly connected.
The implementation method of the utility model first to the 5th is above described, below, introduce one kind originally with reference to Figure 20 and Figure 21 Cell and the embodiment of battery modules that utility model is provided, wherein the effect with said structure implementation method same characteristic features Do not do herein and excessively repeat.
In the present embodiment, there is provided a kind of cell, the cell 100 includes shell 109, is contained in shell 109 Electrode terminal 101 and the cover plate 102 of package casing that interior battery core 108 is electrically connected with the battery core 108, electrode terminal 101 set Put on cover plate 102, electrode terminal is included through cover plate 102 and the pole 104 that electrically connect with battery core, cell also includes pacifying Current interrupt device 200 on pole 104, the current interrupt device 200 is connected with the internal gas of shell, wherein electric current Interruption means 200 has electric-conductor 201 and is connected with the flip piece 202 being electrically connected to each other with the electric-conductor 201, and flip piece 202 can be disconnected under gas pressure with electric-conductor 201 and electrically connect, and wherein electric-conductor 201 is connected on pole 104 with mutually electricity Connection, flip piece 202 is connected with electric-conductor 201 by boss welding structure, and the boss welding structure includes boss 203, accommodates The connecting hole 204 of the boss 203 and the annular solder joint 217 between the boss 203 and connecting hole 204, the shape of flip piece 202 As the first laminated structure, connecting hole 204 is formed with first laminated structure, electric-conductor 201 is formed as the second laminated structure, Boss 203 is formed with second laminated structure, indentation 205 is formed with electric-conductor 203, the indentation 205 sets around boss 203 Put, and electric-conductor 201 is connected on the outer end end face of pole 104, and the outer peripheral edge of flip piece 202 is fixed relative to cover plate 102, Pole 104 is fixedly connected with cover plate 102, and connection enclosure is formed with pole 104 and current interrupt device 200 is led Stomata road, pole 104 is arranged on and is sealedly attached on the ceramic ring 207 on cover plate 102, is sealed on the outer face of ceramic ring 207 Conducting ring 216 is connected with, the outer peripheral edge of flip piece 202 is sealedly connected on the conducting ring 216, pole 104 leads to conducting ring 216 Ceramic ring 207 is crossed to insulate.So as to stably accomplish the transmission and interruption of electric current.
In the present embodiment, receiving hole 218 is formed with the outer end end face of pole 104, the outer peripheral edge of electric-conductor 201 is 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 boss 203 The center of circle stagger along the oval long axis direction, and the major axis of ellipse is obliquely installed with the axis of electrode terminal.
In the present embodiment, and the outer end periphery inner edge with radial direction boss 105, ceramic ring 207 of pole 104 has Support connects the radial support 208 of the radial direction boss 105, and radial direction boss 105 is the multiple of circumferentially spaced setting, radial support 208 is the multiple of 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, pole 104 Insertion is connected on inner ring, and the conducting ring 216 insulated with pole is sealedly connected with outer ring, and the outer peripheral edge of flip piece 202 is fixed It is connected on the conducting ring 216, transition rings 209 is sealedly connected with the inner face of ceramic ring 207, the transition rings 209 sealing connects It is connected on cover plate 102 to cause ceramic ring 207 and the interval setting of cover plate 102.
In the present embodiment, ceramic ring 207 is respectively between conducting ring 216, pole 104 and transition rings 209 by ceramics Sealed with brazing is connected.
In the present embodiment, transition rings 209 have inner ring and the outer ring for forming Z-type structure, and cover plate is formed with for pole 104 The through hole for passing through, the end face of the through hole is ledge structure, and the inner ring insertion of transition rings is supported in ledge structure.
In the present embodiment, the outer face of conducting ring 216 is formed with L-type seam, the outer peripheral edge insertion support of flip piece 202 In the L-type seam, and the outer peripheral edge is sealedly connected on the L-type seam by the block 210 that cover sets the flip piece 202.
Wherein, in order to complete the assembling of the cell, as shown in figs 20 and 21, lower spacer ring is connected with battery core 108 107, the lower section of cover plate 102 is connected with spacer ring 106, and upper and lower spacer ring can be made of isolation material.Wherein, cell 100 is gone back Including the interior connection sheet 110 being connected with battery core, the interior connection sheet 110 is extended between spacer ring 107 and lower spacer ring 106, is Transmission electric current, the lower surface of pole 104 is formed with end difference, and this connects end difference through cover plate 102 and upper spacer ring 106 and interior company The end clamping of contact pin 110.So as to complete electric current from battery core 108 to the transmission of pole 104 and cause cover plate 102 and shell 109 are insulated, it is to avoid powered.
In the battery modules that the present embodiment is provided, the battery modules include multiple cells, at least one monomer electricity Pond is above-mentioned cell, and current interrupt device 200 extends radially out cover plate 102, adjacent cell 100 it Between, current interrupt device 200 mutually staggers on the bearing of trend of cover plate with adjacent electrode terminal.In addition, as shown in figure 1, Between adjacent cell 100, connected by L-type connector 214 between current interrupt device 200 and adjacent electrode terminal Connect, the L-type connector 214 has covering part 211 and lead division 212, the covering of covering part 211 is connected to current interrupt device 200 On, lead division 212 extends to adjacent electrode terminal.
Additionally, the present embodiment also provides a kind of electrokinetic cell, it is characterised in that the electrokinetic cell includes inclusion and is contained in Battery modules in the inclusion, battery modules are above-mentioned battery modules, and are provided with for detecting fuel gas in inclusion Gas-detecting device, the gas-detecting device adjacent currents interruption means set, for being carried for electrokinetic cell protection system For fuel gas signal.Furthermore, it is contemplated that cost and effect, have a current interrupt device in the battery modules.
Above describe the cell with current interrupt device or explosion-proof valve, current interrupt device therein or explosion-proof Valve is the safety measure realized by the mechanical structure of itself.The utility model will be described in detail and be protected including electrokinetic cell below The electrokinetic cell of protecting system, security is lifted with by automatically controlled mode.
As shown in figure 19, the utility model provides a kind of electrokinetic cell, and the electrokinetic cell can be above-mentioned with electric current Disconnected device, explosion-proof valve or other kinds of electrokinetic cell.Wherein, electrokinetic cell includes inclusion and the multiple being contained in the inclusion Cell 100, wherein the plurality of cell 100 is for example in a series arrangement or parallel way composition battery modules, wherein institute State the gas-detecting device 300 being provided with inclusion for detecting the fuel gas in electrokinetic cell, such as gas sensor, from And whether to cut off the charge-discharge circuit of electrokinetic cell and providing signal.For example, gas-detecting device 300 is particularly useful in sense Detected in the electrokinetic cell when answering mechanism's (such as current interrupt device as described above, explosion-proof valve etc.) of air pressure to open Fuel gas.
Wherein, the protection system that the electrokinetic cell includes is removed includes the above-mentioned gas-detecting device in electrokinetic cell Outside 300, also including control device 400 and connecting and disconnecting of the circuit device 403.
Wherein, the signal of detection is fed back to control device 400 by gas-detecting device 300, and the control device 400 is used for root According to the charge-discharge circuit that the signal of the detection determines whether to control connecting and disconnecting of the circuit device 403 to cut off electrokinetic cell.That is, this practicality Security in new is by detecting in inclusion with the presence or absence of fuel gas and automatically controlling for carrying out.Wherein, sent out in battery Life is overcharged or during the unsafe condition such as short circuit, and inside battery can produce fuel gas, overcharges or fuel gas that short circuit is produced is general It is H2, CO, CH4, C2H4, C2H6Deng, at this moment battery cell air pressure inside can increase therewith, when the cracking pressure limit is increased to, Mechanism's (explosion-proof valve as escribed above or current interrupt device) of induction air pressure is opened, and gas is discharged into battery bag, now gas Body detection means 300, such as gas sensor are able to detect that fuel gas, and testing result is fed back into control device 400, Control device 400 is according to whether detect the amount of fuel gas or the fuel gas for detecting to decide whether to cut off electrokinetic cell Charge-discharge circuit.When fuel gas is detected, or fuel gas amount exceed predetermined threshold value when, control device 400 can To control connecting and disconnecting of the circuit device 403 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, as shown in figure 19, electrokinetic cell can also include being controlled by control device 400 Warning device 500, can so point out related personnel to withdraw scene by warning devices such as voice, flashing light, sirens, and drop Lower security hidden danger.
Alternatively, the control device 400 can include microcontroller 404, host computer main control chip 401 and control module 402, wherein：The microcontroller 404, for processing the signal that the gas-detecting device 300 is detected, and will treatment Result is transferred to the host computer main control chip 401；The control module 402, for receiving the microcontroller 404 or described The control instruction that host computer main control chip 401 sends, to control the connecting and disconnecting of the circuit device 403 to cut based on the control instruction The charge-discharge circuit of the disconnected electrokinetic cell.Control device 400 is described in detail below in conjunction with Figure 25-Figure 27.
In the control device 400 shown in Figure 25,404 pairs of signals of the detection of the gas-detecting device 300 of microcontroller Processed, and result is transferred to host computer main control chip 401, then demonstrate the need for controlling the electricity in result When road on-off system 403 cuts off the charge-discharge circuit of electrokinetic cell, host computer main control chip 401 can send to control module 402 Control instruction, control module 402 can control the connecting and disconnecting of the circuit device 403 to cut off the power electric after receiving control instruction The charge-discharge circuit in pond.In addition, in order to alert user, the electrokinetic cell protection system according to the embodiment can also include report Alarm device 500, the alarm command of warning device 500 can come from microcontroller 404 or host computer main control chip 401, Figure 25 In show that warning device 500 receives the alarm command that host computer main control chip 401 sends.
In the control device 400 shown in Figure 26,404 pairs of signals of the detection of the gas-detecting device 300 of microcontroller Processed, and by result be transferred to host computer main control chip 401 in order to host computer main control chip 401 can to treatment Result is preserved, and the charge and discharge for demonstrating the need for controlling the connecting and disconnecting of the circuit device 403 to cut off electrokinetic cell in result During circuit, microcontroller 404 can send control instruction to control module 402, and control module 402 is received after control instruction The connecting and disconnecting of the circuit device 403 can be controlled to cut off the charge-discharge circuit of the electrokinetic cell.In addition, in order to alert user, root Warning device 500 can also be included according to the electrokinetic cell protection system of the embodiment, the alarm command of warning device 500 is from upper Position machine main control chip 401.
In the control device 400 shown in Figure 27,404 pairs of signals of the detection of the gas-detecting device 300 of microcontroller Processed, and by result be transferred to host computer main control chip 401 in order to host computer main control chip 401 can to treatment Result is preserved, and the charge and discharge for demonstrating the need for controlling the connecting and disconnecting of the circuit device 403 to cut off electrokinetic cell in result During circuit, microcontroller 404 can send control instruction to control module 402, and control module 402 is received after control instruction The connecting and disconnecting of the circuit device 403 can be controlled to cut off the charge-discharge circuit of the electrokinetic cell.In addition, in order to alert user, root Warning device 500 can also be included according to the electrokinetic cell protection system of the embodiment, the alarm command of warning device 500 is from micro- Controller 404.Compared to the control device 400 shown in Figure 25 and 26, the advantage of the control device 400 shown in Figure 27 is, on Position machine main control chip 401 is used only for recording the result of microcontroller 404 and being not involved in warning device 500 and connecting and disconnecting of the circuit The control of device 403, this enable the security of the electrokinetic cell protection system independent control battery according to the embodiment and It is not coupled with other battery protection measures, namely only in other battery protection measures and the protection system according to the embodiment When failing simultaneously, electrokinetic cell is possible to the dangerous situations such as blast, therefore the embodiment can greatly reduce electricity The probability of pond blast, improves the security of battery.
Particular circuit configurations of the embodiment of the present disclosure not to gas-detecting device 300, control module 402 etc. are limited, As long as it can realize corresponding function.
Figure 28 gives a kind of circuit diagram of exemplary gas-detecting device 300, and the gas-detecting device is included by transporting The amplifying circuit put the reference circuit of A1 compositions and be made up of amplifier A2, and inspection is exported to microcontroller 404 by terminal Vout Survey signal.
Figure 29 gives a kind of circuit diagram of exemplary control module 402.The input Vin of control module 402 is received The control signal that microcontroller 404 or host computer main control chip 401 send, then passes through the first order being made up of Q1, R2 and R3 Amplify and after the second level that is made up of Q3 and Q4 is amplified controlling transistor Q4 break-make, with realize control relay K1 (namely Foregoing circuit on-off system 403) purpose.
According in embodiment of the present disclosure, connecting and disconnecting of the circuit device 403 can be the relay in charge-discharge circuit Device.
In the specific course of work, the collection signal for gas sensor can do digital-to-analogue conversion, Sampling hold etc. Treatment, it can in addition contain carry out the breakdown judge of system, when system does not break down, further can will gather signal The treatment of gas concentration is carried out so as to judge whether to there occurs the leakage of fuel gas, when the leakage concentration that fuel gas occurs surpasses When crossing threshold value, the operation of cut-out circuit and alarm is sent by host computer main control chip 401 or microcontroller 404.
Wherein, in this embodiment, gas-detecting device is arranged on outside cell, and fuel gas can be by upper The current interrupt device or explosion-proof valve stated in each implementation method of the utility model are released, as long as can release gas in addition, also may be used Released with by well known to a person skilled in the art various conventional explosion-proof valves.That is, in battery modules, at least one cell On be provided with cell internal gas pressure effect under cut off charge-discharge circuit current interrupt device, i.e., foregoing each electricity Stream interruption means.And current interrupt device can in the switched off state enable that the gas in shell leaks.So that Gas-detecting device in inclusion is able to detect that the fuel gas for leaking, and now represents that battery has been occurred in that and overcharges or short circuit Deng dangerous situation.Additionally, for the sensitivity of lifting system, it is preferable that gas-detecting device adjacent currents interruption means is set, So as to can in time detect corresponding signal after fuel gas release and feed back to control device.In addition, except current interruptions dress Put outer, in some embodiments, be provided with least one cell in the cell internal gas pressure Release the explosion-proof valve of gas under effect, such as the explosion-proof valve in the 3rd implementation method, now, gas-detecting device can neighbouring institute State explosion-proof valve setting.
In the present embodiment, in order to realize above-mentioned gas leak, the current interrupt device in the respective embodiments described above With covering, the stomata being in communication with the outside is formed with the covering.So, the gas in the shell can be enabled Leaked after flip piece and electric-conductor disconnect electrical connection and again by flip piece.Specifically, can now be set on flip piece There is the indentation that can be broken by the air pressure inside of shell.Pressure-resistant degree on indentation wherein on flip piece is in some implementation methods In, such as in second and third implementation method, the indentation intensity or the 3rd of electric-conductor body in second embodiment can be more than The intensity of the indentation in implementation method on two electrode leading-out pieces, so as to realize turn-off current first and then in the other mistakes of release Journey.Additionally, as using the current interrupt device in the first embodiment of Fig. 1 to Figure 12, processed on flip piece above-mentioned Indentation.
In addition, the stomata on covering is also possible that current interrupt device directly sets up pressure difference with air, so as to realize The action of flip piece.Covering wherein herein can be the block 210 in the first embodiment according to Fig. 1 to Figure 12, Can be the connector 1210 in the second embodiment according to Figure 13 to Figure 17, or be the protection in the 3rd implementation method Film 2099 etc..So as to after corresponding indentation is pulled off so that gas can be for example, by first according to Fig. 1 to Figure 12 Stomata 213 in implementation method releases, so as to detect the fuel gas leaked into bag in time by gas-detecting device.
Five kinds of implementation methods of the present utility model are described in detail above in association with accompanying drawing, but, the utility model is not limited Detail in above-mentioned implementation method, in range of the technology design of the present utility model, can be to skill of the present utility model Art scheme carries out various simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the utility model is to each Possible combination is planted no longer separately to illustrate.
Additionally, can also be combined between a variety of implementation methods of the present utility model, as long as it is not disobeyed Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Finally, the Developed Background for introducing the above-mentioned utility model design of the utility model is described：
With increasingly sharpening for environmental pollution, the exploitation of new-energy automobile is into national new strategical planning, and new energy Mixed dynamic or pure electric automobile in automobile occupies the main flow in current automobile market, in electric automobile field, course continuation mileage mesh Before be restriction development principal element, and this depend on battery core energy density, the main core material of existing market be ternary With LiFePO4 Liang Ge camps, the former energy density is high, but poor safety performance, especially overcharge or short circuit can cause it is on fire Blast, this automobile industry strict for security performance requirement is a very big challenge.
But the increase of battery capacity can bring course continuation mileage higher, and this allows for everybody security to ternary material Can need to take certain improvement project to ensure its security, but because the performance of material is difficult further to be improved again, 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) come in module Battery core carry out voltage and current temperature management and control, but in actual use, the uniformity of battery core and the reliability of management software Still there is certain accidental risk.Specifically, the use habit with reference to people for mobile device, it is popular for electric automobile It is general also to there is the situation for car body plugging in and charging always, although to there are BMS softwares to be controlled, when this battery of list is long Between charge, if software detection failure or other battery core is overcharged in inclusion loop risk just occurs extremely.Therefore, this practicality is new The inventor of type expects being a kind of mechanical design protection of battery design, is pacified with caused battery after avoiding software failure Full property risk.
For mechanical safeguard measure, inventor of the present utility model creatively has found, battery overcharge or short circuit It is in fact regular governed etc. the current interruptions opportunity under precarious position, i.e. can utilize and overcharge or the dangerous shape such as short circuit The principle that air pressure inside rises when state occurs, designs the current interrupt device of the electric current that can interrupt electrode terminal or explosion-proof Valve such that it is able to the input or output of coordination electrode terminal, to ensure safety.
Further, since more than ten times of the electrokinetic cell capacity used on automobile generally 3C batteries class, and by electric current Even more dozens or even hundreds of times of baby battery class, thus also require this piece have to can by very big electric current, and due to The reason for use environment, its weatherability and sealing requirements are stricter, and these problems just form this reality after collecting With technical scheme in new each above-mentioned implementation method.And by verification experimental verification, in the utility model each implementation method Current interrupt device or explosion-proof valve can in time disconnect the electric current of battery, so as to effectively lift security.

Claims (17)

1. a kind of electrokinetic cell protection system, it is characterised in that the protection system includes that control device (400), connecting and disconnecting of the circuit are filled Put (403) and the gas-detecting device (300) in electrokinetic cell；
The gas-detecting device (300), for detecting flammable in the electrokinetic cell when the mechanism of induction air pressure opens The signal of detection is simultaneously fed back to the control device (400) by gas,
The control device (400), for being determined whether to control the connecting and disconnecting of the circuit device (403) according to the signal of the detection Cut off the charge-discharge circuit of the electrokinetic cell.
2. protection system according to claim 1, it is characterised in that the protection system also includes by the control device (400) warning device (500) of control.
3. protection system according to claim 1, it is characterised in that the gas-detecting device (300) is gas sensing Device.
4. protection system according to claim 1, it is characterised in that the fuel gas is H2、CO、CH4、C2H4、C2H6 In one kind.
5. protection system according to claim 1, it is characterised in that the control device (400) is including microcontroller (404), host computer main control chip (401) and control module (402), wherein：
The microcontroller (404), is processed for the signal to the detection, and result is transferred to described upper Machine main control chip (401)；
The control module (402), sends for receiving the microcontroller (404) or the host computer main control chip (401) Control instruction, filled with controlling the connecting and disconnecting of the circuit device (403) to cut off the electrokinetic cell based on the control instruction Discharge circuit.
6. protection system according to claim 1 or 5, it is characterised in that the connecting and disconnecting of the circuit device (403) is including being located at Relay in the charge-discharge circuit.
7. protection system according to claim 5, it is characterised in that the protection system also includes warning device (500), For being alarmed under the control of the microcontroller (404) or the host computer main control chip (401).
8. a kind of electrokinetic cell, the electrokinetic cell includes inclusion and the multiple cells (100) being contained in the inclusion, its It is characterised by, the electrokinetic cell is also included in inclusion for the detection fuel gas when the mechanism of induction air pressure opens Gas-detecting device (300), so that the signal that control device (400) is detected according to the gas-detecting device (300) determines Whether connecting and disconnecting of the circuit device (403) is controlled to cut off the charge-discharge circuit of the electrokinetic cell.
9. electrokinetic cell according to claim 8, it is characterised in that be provided with cell described at least one described The mechanism of induction air pressure, the mechanism of the induction air pressure is included in the lower cut-out charge and discharge of the cell internal gas pressure effect The current interrupt device of circuit, and the current interrupt device can in the switched off state cause the outer of the cell Gas in shell can leak.
10. electrokinetic cell according to claim 9, it is characterised in that the neighbouring electricity of the gas-detecting device (300) Stream interruption means is set.
11. electrokinetic cells according to claim 9, it is characterised in that the current interrupt device have electric-conductor and with The flip piece of electric-conductor electrical connection, and the flip piece can disconnect under gas pressure with the electric-conductor and electrically connect.
12. electrokinetic cells according to claim 11, it is characterised in that the current interrupt device also has covering, Stomata is formed with the covering to enable that the gas in the shell disconnects electricity in the flip piece and the electric-conductor Leaked after connection.
13. electrokinetic cells according to claim 8, it is characterised in that thoughts are set on cell described at least one Answering the mechanism of air pressure, the mechanism of the induction air pressure includes that gas can be released under cell internal gas pressure effect The explosion-proof valve of body.
14. electrokinetic cells according to claim 13, it is characterised in that the gas-detecting device (300) is neighbouring described Explosion-proof valve is set.
15. electrokinetic cells according to claim 8, it is characterised in that the fuel gas is H2、CO、CH4、C2H4、C2H6 In one kind.
A kind of 16. electrokinetic cells, the electrokinetic cell includes inclusion and the multiple cells (100) being contained in the inclusion, Characterized in that, the electrokinetic cell also includes the protection system according to any one in claim 1-7.
17. a kind of electric automobiles, it is characterised in that the electric automobile is provided with according to any one in claim 8-16 Electrokinetic cell.
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CN107123833A (en) * 2016-02-25 2017-09-01 比亚迪股份有限公司 Electrokinetic cell and its protection system and electric automobile
CN109728364A (en) * 2018-12-26 2019-05-07 中山大学 Meet the control strategy of the high energy density cells system of AUTOSAR

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