CN209264924U - Battery in-situ stress test device - Google Patents

Abstract

The utility model belongs to battery tester technical field, more particularly to a kind of battery in-situ stress test device, including main nacelle, observation window, electrode mount to be measured and to electrode mount, the inside of main nacelle is equipped with accommodating cavity, the top of accommodating cavity is equipped with top opening and both sides are respectively equipped with the first side opening and the second side opening, and observation window is covered on top opening and is tightly connected with main nacelle；Electrode mount to be measured is out of the first side opening insertion accommodating cavity and is covered in the first side opening, and electrode mount to be measured is equipped with the substrate for carrying electrode to be measured and being located at below observation window；Out of the second side opening insertion accommodating cavity and the second side opening is covered in electrode mount, electrode mount and electrode mount interval to be measured are arranged.The battery in-situ stress test device of the utility model, structure is simple, and can be realized and test the stress of electrode.

Description

Battery in-situ stress test device

Technical field

The utility model belongs to battery tester technical field more particularly to a kind of battery in-situ stress test device.

Background technique

Lithium ion battery has been widely used due to having many advantages, such as that energy density is high, having extended cycle life, memory-less effect In the fields such as portable electronic device (such as mobile phone, camera, video camera, laptop) and electric tool, and gradually to The new energy energy storage field such as electric bicycle, electric car is expanded.Wideling popularize and develop with new-energy automobile, to power The demand of lithium ion battery and day increase severely, and research and develop the lithium ion power of a new generation's high-energy, high power, long circulation life Battery is extremely urgent, it has also become the hot spot of whole world scientist and Enterprisers Study.

Lithium ion battery is by positive and negative pole material, electrolyte, diaphragm, collector, binder, conductive agent, battery case, tab etc. Part is constituted.When charging, lithium ion is from positive electrode deintercalation, by electrolyte insertion negative electrode material, cathode is in rich lithium shape State；When electric discharge, lithium ion is again from negative electrode material deintercalation, by electrolyte insertion positive electrode, anode is in lithium-rich state.Lithium The insertion and deintercalation of ion make electrode generate stress, and charge and discharge repeatedly generate tension and compression stress repeatedly, so that electrode is gradually opened Beginning dusting, causes battery life to reduce, and energy reduces, and more even results in battery failure.

The performances such as high-energy, high power, long circulation life in order to further enhance battery, make it more fully meet number Code product, electric tool, energy storage and automotive battery requirement, need to further investigate battery electrode in charge and discharge process and answer Stress variation in power, and detection charge and discharge in real time.It can be fed back by these testing results and be ground with lithium ion battery In hair, the most effective research for carrying out reducing influence of the stress to battery, for research high-energy, high power, long circulation life Battery material provides direction.

It is existing at present that strain transducer probe assembly, strain biography can be generally comprised with the device of in-situ test battery stress Sensor probe optical fiber component, cabinet, analog-digital converter, single-chip microcontroller and host computer；The output end of strain transducer probe assembly and One end of strain transducer probe optical fiber component connects, each in the other end and cabinet of strain transducer probe optical fiber component to answer Become the input terminal connection of sensor, the output end of each strain transducer and the input terminal of analog-digital converter connect in cabinet, mould The output end of number converter is connected with the input terminal of single-chip microcontroller, and the output end of single-chip microcontroller is connected with host computer.This kind of device is main Be applied to relatively large soft-package battery and using strain transducer measure be some position of battery integrated stress situation, The stress of specific electrode can not be measured, and stress value accuracy is influenced by the sensitivity and installation method of inductor.

Utility model content

The purpose of this utility model is to provide a kind of battery in-situ stress test devices, it is intended to solve in the prior art Battery stress test device structure is complicated and can not validity test electrode stress the technical issues of.

A kind of battery in-situ stress test device that in order to achieve the above purposes, the technical solution adopted by the utility model is:, packet Main nacelle, observation window, electrode mount to be measured and to electrode mount are included, the inside of the main nacelle is equipped with accommodating cavity, described The top of accommodating cavity is equipped with top opening and both sides are respectively equipped with the first side opening and the second side opening, the observation window capping It is tightly connected on the top opening and with the main nacelle；

The electrode mount to be measured is inserted into the accommodating cavity from first side opening and is covered in first side It is open and is tightly connected with the main nacelle, the electrode mount to be measured is equipped with for carrying electrode to be measured and being located at described Substrate below observation window；

It is described electrode mount is inserted into the accommodating cavity from second side opening and is covered in described second side open Mouth is simultaneously tightly connected with the main nacelle, described that electrode mount is arranged with the electrode mount interval to be measured.

Preferably, the electrode mount to be measured include electrode support to be measured and be connected to described electrode support to be measured one end to Electrode prop head is surveyed, the electrode support to be measured is inserted into the accommodating cavity from first side opening and is installed with the electrode to be measured The setting of part interval, the substrate are set in the electrode support to be measured, and the electrode prop head to be measured is covered in first side opening It goes up and passes through the first fastening assembly and the main nacelle is tightly connected.

Preferably, the medial surface of the electrode prop head to be measured is equipped with first annular slot, is equipped in the first annular slot First sealing ring, the first side of the main nacelle are abutted with first sealing ring.

Preferably, first fastening assembly includes the first stud and the first nut, and first stud is horizontal solid Due to the first side of the main nacelle, the electrode prop head to be measured is equipped with the first perforation, and first stud passes through described First perforates and is adapted to connection with first nut, and first nut is abutted with the lateral surface of the electrode prop head to be measured.

Preferably, the electrode support to be measured is equipped with through-hole, and opposite two inside of the through-hole is formed with step, the base Piece is set in the through-hole and is placed on the step.

Preferably, it is described to electrode mount include to electrode support and be connected to it is described to electrode support one end to electrode support Head, it is described that electrode support is inserted into the accommodating cavity from second side opening and is arranged with the electrode support to be measured interval, institute Electrode prop head to be measured is stated to be covered on second side opening and be tightly connected by the second fastening assembly and the main nacelle.

Preferably, the medial surface to electrode prop head is equipped with the second annular groove, and the is equipped in second annular groove Two sealing rings, the second side of the main nacelle are abutted with second sealing ring.

Preferably, second fastening assembly includes the second stud and the second nut, and second stud is horizontal solid Described to be equipped with the second perforation to electrode prop head due to the second side of the main nacelle, second stud passes through described the Two perforate and are adapted to connection with second nut, and second nut is abutted with the lateral surface to electrode prop head.

Preferably, the electrode support to be measured is in U-shape shape, and the unlimited mouth down of the electrode support to be measured for the shape that is in U-shape, institute State the open ports of the electrode support to be measured that the shape that is in U-shape is protruded into electrode support in long strip to electrode support, in long strip Interior and electrode support to be measured interval setting with the shape that is in U-shape.

Preferably, the top of the main nacelle be equipped with positioned at top opening periphery deep gouge, the shape of the deep gouge with it is described The shape of observation window is adapted, and the observation window is placed in the deep gouge；

The battery in-situ stress test device further includes window cover, and the window cover compresses the observation window and by holding out against admittedly It is fixedly connected at the top of component and the main nacelle, and offers the window of observation window described in face in the window cover.

Preferably, the groove bottom wall of the deep gouge is equipped with top annular groove, is equipped with top sealing ring in the top annular groove, described The bottom surface of observation window is abutted with the top sealing ring.

Preferably, the top fastening assembly includes bolt and jacking nut, and the main nacelle is equipped in a vertical shape vertical Perforation, the window cover are equipped with top perforation, and the bolt passes through the vertical perforation and the top from the bottom of the main nacelle It perforates and is adapted to connection with the jacking nut, the jacking nut is abutted with the top surface of the window cover.

It, first will be to be measured when test the utility model has the beneficial effects that the battery in-situ stress test device of the utility model Electrode material is coated in and (the methods of PVD, blade coating can be used) back side of substrate, and then substrate is arranged in electrode mount to be measured On, then electrode mount to be measured is inserted into accommodating cavity from the first side opening and is covered in the first side opening and is sealed with main nacelle Connection；Then electrode material will be coated or will be bundled in electrodes installation part, then will be to electrode mount from second side In opening insertion accommodating cavity and it is covered in the second side opening and is tightly connected with main nacelle；Then observation window is covered in top opening It above and with the top of main nacelle is tightly connected, followed by injecting and filling in electrolyte to accommodating cavity, finally by battery testing system System is connected with the electrode mount to be measured of the device with to electrode mount, and the device to carefully connect the wire is placed on optical lever stress test The corresponding position of instrument can carry out charge and discharge and stress test.

Detailed description of the invention

It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with It obtains other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of battery in-situ stress test device provided by the embodiment of the utility model.

Fig. 2 is the Section View of battery in-situ stress test device provided by the embodiment of the utility model.

Fig. 3 is the structural decomposition diagram of battery in-situ stress test device provided by the embodiment of the utility model.

Fig. 4 is the structural schematic diagram of the main nacelle of battery in-situ stress test device provided by the embodiment of the utility model.

Fig. 5 is the structure of the electrode mount to be measured of battery in-situ stress test device provided by the embodiment of the utility model Schematic diagram.

Fig. 6 is electricity of the battery in-situ stress test device provided by the embodiment of the utility model to cassiterite ink Dual-ion cell Charging and discharging curve figure when pole is tested.

Fig. 7 is battery in-situ stress test device provided by the embodiment of the utility model to cassiterite ink Dual-ion cell Stress diagrams when electrode is tested.

Fig. 8 is electricity of the battery in-situ stress test device provided by the embodiment of the utility model to aluminium graphite Dual-ion cell Charging and discharging curve figure when pole is tested.

Fig. 9 is battery in-situ stress test device provided by the embodiment of the utility model to aluminium graphite Dual-ion cell Stress diagrams when electrode is tested.

Wherein, each appended drawing reference in figure:

10-main nacelle the 12-the second side openings of the 11-the first side opening

13-top opening 14-accommodating cavity, 15-deep gouges

16-top annular grooves 17-are perforated 20-observation windows vertically

30-electrode mounts to be measured 31-electrode support to be measured 32-electrode prop head to be measured

40-to electrode mount 41-to electrode support 42-to electrode prop head

50-substrate the 61-the first studs of the 60-the first fastening assembly

62-the first nut the 71-the second stud of the 70-the second fastening assembly

72-the second 80-top of nut, 81-bolt of fastening assembly

82-jacking nut 90-window cover, 91-windows

92-top perforation, 161-top 311-through-hole of sealing ring

312-steps 321-first annular the 322-the first sealing ring of slot

323-the first 421-the second the 422-the second sealing ring of annular groove of perforation

423-the second perforation.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining the description of attached drawing 1~9 is exemplary, it is intended to for explaining the utility model, and should not be understood as practical to this Novel limitation.

In the description of the present invention, it should be understood that term " length ", " width ", "upper", "lower", " preceding ", The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this The limitation of utility model.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.

As shown in Figures 1 to 3, a kind of battery in-situ stress test device provided by the embodiment of the utility model, including main cabin Body 10 and observation window 20, the material of main nacelle 10 can be polyamide (nylon), polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE) etc., excellent It is selected as polytetrafluoroethylene (PTFE), the main nacelle 10 of polytetrafluoroethylene (PTFE) manufacture has higher hardness and corrosion resistance.The material of observation window 20 Matter can be the good simple glass of translucency, quartz glass, sapphire glass etc., preferably quartz glass, quartz glass manufacture Observation window 20 there is more preferably translucency, and it is cheap.Wherein, 20 thickness of observation window can be 1mm~5mm, preferably There is enough intensity while 2mm is to guarantee translucency.

Further, as shown in Figure 2 and Figure 4, the inside of the main nacelle 10 is equipped with accommodating cavity 14, the effect of accommodating cavity 14 Can be used for being accommodated in and carry out injecting the electrolyte in it when test job, the top of the accommodating cavity 14 be equipped with top opening 13 with And both sides are respectively equipped with the first side opening 11 and the second side opening 12, the perforation of top opening 13 to the top of main nacelle 10, first Side opening 11 and the second side opening 12 are then penetrated through respectively to opposite the first side and the second side of main nacelle 10, the observation Window 20 is covered on the top opening 13 and is tightly connected with the main nacelle 10, after observation window 20 and the sealed connection of main nacelle 10 Top opening 13 can be fully sealed.

Further, as shown in figures 2-3, battery in-situ stress test device further includes electrode mount 30 to be measured, described Electrode mount 30 to be measured is inserted into the accommodating cavity 14 from first side opening 11 and is covered in first side opening 11 And be tightly connected with the main nacelle 10, the part-structure of electrode mount 30 to be measured protrudes into accommodating cavity 14, and part-structure is close The first side opening 11 is sealed, and the structure for sealing up the first side opening 11 is also fixedly connected with the first side of main nacelle 10, The electrode mount to be measured 30 is equipped with the substrate 50 for carrying electrode to be measured and being located at below the observation window 20, pole piece It places or is fixed on and protrude on the part-structure of the electrode mount to be measured 30 in accommodating cavity 14.

Further, as shown in figures 2-3, battery in-situ stress test device further include to electrode mount 40, it is described right Electrode mount 40 be inserted into the accommodating cavity 14 and be covered in from second side opening 12 second side opening 12 and with The main nacelle 10 is tightly connected, and is protruded into accommodating cavity 14 to the part-structure of electrode mount 40, and part-structure seals up the Two side openings 12, and the structure for sealing up the second side opening 12 is also fixedly connected with the second side of main nacelle 10, it is described right Electrode mount 40 and the electrode mount 30 to be measured interval are arranged, that is, protrude into accommodating cavity 14 to electrode mount 40 Part-structure, without contacting, avoids short circuit with the part-structure interval of the electrode mount to be measured 30 protruded into accommodating cavity 14.

Specifically, the battery in-situ stress test device of the utility model is when carrying out test operation, first by electrode to be measured Material is coated in and (the methods of PVD, blade coating can be used) back side of substrate 50, and then substrate 50 is arranged in electrode mount to be measured On 30, then by electrode mount 30 to be measured from the first side opening 11 insertion accommodating cavity 14 in and be covered in the first side opening 11 and with Main nacelle 10 is tightly connected；Then electrode material will be coated or will be bundled in electrodes installation part, then electrode will pacified Piece installing 40 is out of the second side opening 12 insertion accommodating cavity 14 and is covered in the second side opening 12 and is tightly connected with main nacelle 10；It connects Observation window 20 is covered on top opening 13 and is tightly connected with the top of main nacelle 10, followed by injecting and fill electrolyte To accommodating cavity 14, finally by the electrode mount to be measured 30 of battery test system and the device and electrode mount 40 is connected It connects, the device to carefully connect the wire is placed on to the corresponding position of optical lever measuring stress instrument, charge and discharge and stress test can be carried out.

Wherein, the back side of substrate 50 where the electrode of stress to be measured be can mirror surface it is reflective.Device is assembled up, laser is made The back side in substrate 50 is penetrated by observation window 20.Then start charge and discharge, while using optical lever hair test 50 curvature of substrate half Diameter can calculate stress value by Stoney formula.

Electrolyte is the side for not installing electrode by the other side of main nacelle 10 after device is installed the electrode of side Opening injection is needed slightly to shake exclusion bubble after injection, be sealed after being then slowly inserted into the lateral electrode.

Further, substrate 50 is that at least single side mirror surface is reflective and conductive material, can for stainless steel such as 304, 316,316L etc. can also be conductive monocrystalline silicon piece, and the size of substrate 50 is rectangle, and length-width ratio is greater than equal to 5, preferably Size can be (50mm × 10mm, 50mm × 5mm, 25mm × 5mm).Substrate 50 is placed on or is fixed on electrode mount to be measured It on 30, coats the surface of electrode material to be measured and faces downward and to electrode, opposite then faces window 91, electrode to be measured upward Material coating thickness need to be less than the 1% of 50 thickness of substrate, with the accuracy of proof stress result.

Further, the surface for facing electrode to be measured 41 installation part of electrode support protruded into accommodating cavity 14 can coat or Person binds to electrode material, and electrode mount 30 to be measured is fixed on electrolytic head to be measured by fastener or welding method, shape It integrally, is stainless steel such as 304,316,316L etc. to the material of electrode mount 40.

In the present embodiment, as shown in Fig. 2~3 and Fig. 5, the electrode mount 30 to be measured includes electrode support 31 to be measured and connects It is connected to the electrode prop head 32 to be measured of described 31 one end of electrode support to be measured, electrode prop head 32 to be measured is preferably one with electrode support 31 to be measured It is body formed.The electrode support 31 to be measured is inserted into the accommodating cavity 14 from first side opening 11 and is pacified with the electrode to be measured The setting of the interval of piece installing 30, the substrate 50 are set in the electrode support 31 to be measured, and the electrode prop head 32 to be measured is covered in described It is tightly connected on first side opening 11 and by the first fastening assembly 60 with the main nacelle 10.Electrode support 31 to be measured protrudes into accommodating It is used for carrying substrates 50 in chamber 14, and electrode prop head 32 to be measured is then for sealing the first side opening 11, and the with main nacelle 10 One side is fixedly connected, and connection type can use the first fastening assembly 60, is filled with facilitating to electrode mount 30 to be measured It tears open.

In the present embodiment, as shown in Fig. 2~3 and Fig. 5, the medial surface of the electrode prop head 32 to be measured is equipped with first annular slot 321, first annular slot 321 is the annular groove for being wound around 11 periphery of the first side opening, can be round or non-circular configuration.Institute It states and is equipped with the first sealing ring 322 in first annular slot 321, the first side of the main nacelle 10 and first sealing ring 322 abut.The setting of first sealing ring 322 can seal up what electrode prop head 32 to be measured was contacted with the first side of main nacelle 10 Leakproofness prevents the electrolyte in accommodating cavity 14 from oozing out from the first side opening 11.

In the present embodiment, as shown in figure 3, first fastening assembly 60 includes the first stud 61 and the first nut 62, institute Horizontal the first side for being fixed on the main nacelle 10 of the first stud 61 is stated, the electrode prop head 32 to be measured is equipped with first Perforation 323, first stud 61 pass through first perforation 323 and are adapted to connection with first nut 62, and described first Nut 62 is abutted with the lateral surface of the electrode prop head 32 to be measured.Specifically, be arranged in electrode prop head 32 to be measured first is worn Hole 323 aligns the first stud 61, and then electrode prop head 32 to be measured is pushed into close to the first side of main nacelle 10, until the first spiral shell Column 61 passes through the first perforation 323 and is pierced by except the lateral surface of electrode prop head 32 to be measured, then by the first nut 62 and first Stud 61 is threadedly coupled, and up to the first nut 62 to be torqued-up to the lateral surface for abutting electrode prop head 32 to be measured, so will be to be measured Electrode prop head 32 is fixedly connected with main nacelle 10.

Wherein, the quantity of the first fastening assembly 60 is preferably four, and four the first fastening assemblies 60 are respectively close to the first side The four corners setting of opening 11.

In the present embodiment, as shown in figure 3, the electrode support 31 to be measured be equipped with through-hole 311, the through-hole 311 it is opposite Two insides are formed with step 312, and the substrate 50 is set in the through-hole 311 and is placed on the step 312.

In the present embodiment, as shown in figures 2-3, described includes to electrode support 41 and being connected to described to electrode mount 40 To 41 one end of electrode support to electrode prop head 42, electrode prop head 42 is preferably detachably connected with to electrode support 41, is had in this way Conducive to replacement unlike material to electrode support 41.It is described that the accommodating cavity 14 is inserted into from second side opening 12 to electrode support 41 Interior and be arranged with the electrode support 31 to be measured interval, the electrode prop head 32 to be measured is covered on second side opening 12 and leads to The second fastening assembly 70 is crossed to be tightly connected with the main nacelle 10.Electrode support 41 is protruded into accommodating cavity 14 for carrying to electricity Pole, and to electrode prop head 42 then for sealing the second side opening 12, and be fixedly connected with the second side of main nacelle 10, connection side Formula can use the second fastening assembly 70, be assembled and disassembled with facilitating to electrode mount 40.

In the present embodiment, as shown in figure 3, the medial surface to electrode prop head 42 is equipped with the second annular groove 421, the second ring Shape slot 421 is the annular groove for being wound around 12 periphery of the second side opening, can be round or non-circular configuration.Second annular The second sealing ring 422 is equipped in slot 421, the second side of the main nacelle 10 is abutted with second sealing ring 422.

In the present embodiment, as shown in figure 3, second fastening assembly 70 includes the second stud 71 and the second nut 72, institute Horizontal the second side for being fixed on the main nacelle 10 of the second stud 71 is stated, it is described that electrode prop head 42 is worn equipped with second Hole 423, second stud 71 pass through second perforation 423 and are adapted to connection, second spiral shell with second nut 72 Mother 72 abuts with the lateral surface to electrode prop head 42.Specifically, by the second 423 pairs of perforation to being arranged in electrode prop head 42 Then the second stud 71 of position will be pushed into close to the second side of main nacelle 10 electrode prop head 42, until the second stud 71 passes through Second perforation 423 is simultaneously pierced by except the lateral surface to electrode prop head 42, then by 71 screw thread of the second nut 72 and the second stud Connection, and up to the second nut 72 is torqued-up to the lateral surface abutted to electrode prop head 42, it so will be to electrode prop head 42 and master Cabin 10 is fixedly connected.

Wherein, the quantity of the second fastening assembly 70 is preferably four, and four the second fastening assemblies 70 are respectively close to second side The four corners setting of opening 12.

In the present embodiment, as shown in Figure 3 and Figure 5, the electrode support 31 to be measured is in U-shape shape, and the shape that is in U-shape is described to be measured The unlimited mouth down of electrode support 31, described in long strip to electrode support 41, described protrude into electrode support 41 in long strip is in U-shape It is arranged in the open ports of the electrode support 31 to be measured of shape and with the interval of electrode support 31 to be measured for the shape that is in U-shape.Specifically, to Surveying electrode support 31 can be inverted " u "-shaped, and be strip to electrode support 41, and strip widths are less than " u "-shaped groove width, to protect There are enough gaps without short circuit between two electrodes when card assembly.

In the present embodiment, as shown in figure 4, the top of the main nacelle 10 is equipped with the deep gouge 15 positioned at 13 periphery of top opening, The shape of the deep gouge 15 is adapted with the shape of the observation window 20, and the observation window 20 is placed in the deep gouge 15.Top The shape of opening 13 is width (be greater than 0.2mm~1mm) of the rectangle width direction slightly larger than substrate 50, and length direction is less than base 50 length of piece (1mm~5mm) makes substrate 50 that can be placed on it by its step 312.

Further, as shown in Figures 1 to 3, the battery in-situ stress test device further includes window cover 90, the window cover 90 It compresses the observation window 20 and is fixedly connected by top fastening assembly 80 with the top of the main nacelle 10, and in the window cover 90 Offer the window 91 of observation window 20 described in face.Specifically, window 91 is in the rectangular through holes that window cover 90 is center position 311, the size of rectangular through holes 311 is more than or equal to the size of the top opening 13 at 10 top of main nacelle, less than the ruler of observation window 20 It is very little.The setting of window cover 90 is the periphery by compressing observation window 20, and by pushing up fastening assembly 80 for window cover 90 itself and main cabin The mode that body 10 is fixedly connected reinforce observation window 20 install after stability and leakproofness.

In the present embodiment, as shown in figs. 34, the groove bottom wall of the deep gouge 15 is equipped with top annular groove 16, and top annular groove 16 is It is wound around the annular groove of 13 periphery of top opening, can be round or non-circular configuration.Top is equipped in the top annular groove 16 Sealing ring 161, the bottom surface of the observation window 20 are abutted with the top sealing ring 161.Specifically, the setting for pushing up annular groove 16 can be with Prevent the electrolyte electricity in accommodating cavity 14 from leaking out from observation window 20 and gap present in 10 contact surface of main nacelle, further Reinforce observation window 20 and seal up the sealing performance after top opening 13, the stability and reliability that lifting device uses in ground.

First sealing ring 322, the second sealing ring 422 and top sealing ring 161 can be rubber material, concretely butyronitrile The quick rubber of rubber, neoprene, EP rubbers, fluorubber, silicon rubber etc., preferably perfluor, the first sealing ring of such structure 322, the second sealing ring 422 and top sealing ring 161 have more excellent electrolyte resistance corrosive nature.

In the present embodiment, as shown in figure 3, the top fastening assembly 80 includes bolt 81 and jacking nut 82, the main nacelle 10 are equipped with vertical perforation 17 in a vertical shape, and the window cover 90 is equipped with top perforation 92, and the bolt 81 is from the main nacelle 10 bottom passes through the vertical perforation 17 and top perforation 92 and is adapted to connection, the jacking nut 82 with the jacking nut 82 It is abutted with the top surface of the window cover 90.Specifically, the end of bolt 81 sequentially passes through vertical perforation 17 and top perforation 92 and from top After perforation 92 is pierced by, the top of window cover 90 is extended to, then connect jacking nut 82 with the end thread of bolt 81, until top spiral shell Mother 82 is torqued-up to abut with window cover 90, so can be realized and is fixedly connected with window cover 90 with main nacelle 10, observation window 20 is in window cover Top opening 13 is tightly sealed up under 90 pressure, prevents the electrolyte in accommodating cavity 14 from oozing out from the top opening 13.

Wherein, the quantity for pushing up fastening assembly 80 is identical as the quantity of vertical perforation 17 and top perforation 92, is preferably all provided with It is equipped with periphery settings that are multiple, and being looped around accommodating cavity 14.

First nut 62, the second nut 72 and jacking nut 82 are both preferably wing nut, and wing nut easily facilitates manually Operation, it is practical.

It is assembled with cassiterite ink Dual-ion cell according to the battery in-situ stress test device of the utility model embodiment, wherein Metallic tin is coated on the (size 50mm × 10mm thickness of substrate 50 using magnetron sputtering (PVD) method as electrode to be measured (cathode) 0.2mm, material sus304) above, tin film thickness is 1.5 μm, and graphite is coated with as to electrode (anode) using the mode of blade coating On aluminium foil, then it is bundled in again in electrode support 41.Electrolyte uses LiPF6 electrolyte (1M LiPF6/EC-DMC-EMC (4:3:2v/v/v)).Charging and discharging curve is as shown in fig. 6, in-situ test stress data is as shown in Figure 7.Compression is generated when charging, The stress generated when electric discharge is gradually replied, and mainly Li ion forms alloy in insertion Sn film in charging, leads to volume expansion Li ion deviates from then stress recovery when producing compression, and discharging.

It is assembled with aluminium graphite Dual-ion cell according to the battery in-situ stress test device of the utility model embodiment, wherein Metallic aluminium is coated on the (size 50mm × 10mm thickness of substrate 50 using magnetron sputtering (PVD) method as electrode to be measured (cathode) 0.35mm, material conductive single crystal silicon wafer 100) above, for aluminium film with a thickness of 2 μm, graphite uses blade coating as to electrode (anode) Mode is coated on aluminium foil, is then bundled in again in electrode support 41.Electrolyte uses LiPF6 electrolyte (1M LiPF6/EC- DMC-EMC(4:3:2v/v/v)).Charging and discharging curve is as shown in figure 8, in-situ test stress data is as shown in Figure 9.Trend when charging It is consistent with previous example with the principle of generation.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (12)

1. a kind of battery in-situ stress test device, it is characterised in that: including main nacelle, observation window, electrode mount to be measured and To electrode mount, the inside of the main nacelle is equipped with accommodating cavity, and the top of the accommodating cavity is equipped with top opening and both sides It is respectively equipped with the first side opening and the second side opening, the observation window is covered on the top opening and seals with the main nacelle Connection；

The electrode mount to be measured is inserted into the accommodating cavity from first side opening and is covered in first side opening And be tightly connected with the main nacelle, the electrode mount to be measured is equipped with for carrying electrode to be measured and being located at the observation Substrate below window；

It is described that electrode mount is inserted into the accommodating cavity from second side opening and is covered in second side opening simultaneously It is tightly connected with the main nacelle, it is described that electrode mount is arranged with the electrode mount interval to be measured.

2. battery in-situ stress test device according to claim 1, it is characterised in that: the electrode mount packet to be measured Include electrode support to be measured and the electrode prop head to be measured for being connected to described electrode support to be measured one end, the electrode support to be measured is from described first Side opening is inserted into the accommodating cavity and is arranged with the electrode mount interval to be measured, and the substrate is set to the electrode to be measured In support, the electrode prop head to be measured is covered on first side opening and is sealed by the first fastening assembly and the main nacelle Connection.

3. battery in-situ stress test device according to claim 2, it is characterised in that: the electrode prop head to be measured it is interior Side is equipped with first annular slot, is equipped with the first sealing ring, the first side of the main nacelle and institute in the first annular slot State the first sealing ring abutting.

4. battery in-situ stress test device according to claim 2, it is characterised in that: first fastening assembly includes First stud and the first nut, horizontal the first side for being fixed on the main nacelle of first stud, the electricity to be measured Pole prop head is equipped with the first perforation, and first stud passes through described first and perforates and be adapted to connection, institute with first nut The first nut is stated to abut with the lateral surface of the electrode prop head to be measured.

5. battery in-situ stress test device according to claim 2, it is characterised in that: the electrode support to be measured is equipped with Opposite two inside of through-hole, the through-hole is formed with step, and the substrate is set in the through-hole and is placed on the step.

6. battery in-situ stress test device according to claim 2, it is characterised in that: described to include to electrode mount To electrode support and be connected to it is described to electrode support one end to electrode prop head, it is described that electrode support is inserted into from second side opening It is arranged in the accommodating cavity and with the electrode support to be measured interval, the electrode prop head to be measured is covered on second side opening And it is tightly connected by the second fastening assembly and the main nacelle.

7. battery in-situ stress test device according to claim 6, it is characterised in that: the inside to electrode prop head Face is equipped with the second annular groove, is equipped with the second sealing ring in second annular groove, the second side of the main nacelle with it is described Second sealing ring abuts.

8. battery in-situ stress test device according to claim 6, it is characterised in that: second fastening assembly includes Second stud and the second nut, horizontal the second side for being fixed on the main nacelle of second stud are described to electrode Prop head is equipped with the second perforation, and second stud passes through described second and perforates and be adapted to connection with second nut, described Second nut is abutted with the lateral surface to electrode prop head.

9. battery in-situ stress test device according to claim 6, it is characterised in that: the electrode support to be measured is in U-shape Shape, and the unlimited mouth down of the electrode support to be measured for the shape that is in U-shape, described in long strip to electrode support, in long strip is described The electrode support to be measured interval in the open ports of the electrode support to be measured for the shape that is in U-shape and with the shape that is in U-shape is protruded into electrode support Setting.

10. described in any item battery in-situ stress test devices according to claim 1~9, it is characterised in that: the main nacelle Top be equipped with the deep gouge positioned at top opening periphery, the shape of the deep gouge is adapted with the shape of the observation window, the sight Window is examined to be placed in the deep gouge；

The battery in-situ stress test device further includes window cover, and the window cover compresses the observation window and by top fastening assembly It is fixedly connected at the top of the main nacelle, and offers the window of observation window described in face in the window cover.

11. battery in-situ stress test device according to claim 10, it is characterised in that: the groove bottom wall of the deep gouge is set There is top annular groove, top sealing ring is equipped in the top annular groove, the bottom surface of the observation window is abutted with the top sealing ring.

12. battery in-situ stress test device according to claim 10, it is characterised in that: the top fastening assembly includes Bolt and jacking nut, the main nacelle are equipped with vertical perforation in a vertical shape, and the window cover is equipped with top perforation, the bolt The vertical perforation and top perforation are passed through from the bottom of the main nacelle and connection, the top spiral shell are adapted to the jacking nut Female top surface with the window cover abuts.