CN212275654U - Device for in-situ observation and measurement of electrochemistry - Google Patents
Device for in-situ observation and measurement of electrochemistry Download PDFInfo
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- CN212275654U CN212275654U CN202020540597.XU CN202020540597U CN212275654U CN 212275654 U CN212275654 U CN 212275654U CN 202020540597 U CN202020540597 U CN 202020540597U CN 212275654 U CN212275654 U CN 212275654U
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Abstract
The utility model relates to a lithium ion battery technical field, in particular to device of normal position observation and measurement electrochemistry. The device comprises a device main body, an upper window assembly, a lower window assembly and two elastic test probes, wherein the device main body is provided with a slot structure, and the slot structure is used for inserting a battery pole piece or a metal sheet; the upper window assembly and the lower window assembly are respectively arranged at the upper end and the lower end of the slot structure and are hermetically connected with the device main body; the two elastic test probes are respectively arranged on two sides of the device main body and are in contact with the battery pole piece or the metal sheet in the slot structure. The utility model discloses an optimize slot structure, realize the growth condition of recording battery lithium dendrite in the practical application process, can measure its electrochemistry relevant information to the interact between battery pole piece and the electrolyte simultaneously.
Description
Technical Field
The utility model relates to a lithium ion battery technical field, in particular to device of normal position observation and measurement electrochemistry.
Background
The lithium battery is used as a new high-energy secondary battery and is widely applied to the fields of digital 3C products, electric automobiles, unmanned aerial vehicles and the like in recent years. The lithium battery has the advantages of high energy density, high output power, long cycle life, long endurance, small self-discharge loss and the like, so the lithium battery gradually replaces the application field of the traditional lead-acid battery and the traditional nickel-chromium battery.
Lithium batteries are various in type, and include lithium ion batteries, lithium metal batteries, lithium polymer batteries, lithium solid state batteries, and the like. Among them, lithium ion batteries are different in electrolyte and have different performance. In particular, the growing problem of lithium dendrites always troubles the safety of lithium batteries, and in the lithium ion batteries, different electrolyte systems are in contact with lithium, and the lithium dendrites grow differently. At present, the cognition on the lithium dendrite is only obtained by disassembling the battery after the battery is invalid, and the growth process and the characteristics of the lithium dendrite are not known in the recycling process of the battery. Therefore, a device for directly observing the growth of the lithium dendrite is urgently needed, the growth condition of the lithium dendrite in the practical application process of the battery can be recorded, and the electrochemical related information of the battery can be additionally measured by the interaction between a battery pole piece and electrolyte.
SUMMERY OF THE UTILITY MODEL
To the above problem, an object of the utility model is to provide a device of electrochemistry is observed and measured to normal position to the growth condition of lithium dendrite of record battery in practical application process, and can be to the interact between battery pole piece and the electrolyte, measure its electrochemistry relevant information.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a device for in-situ observation and measurement of electrochemistry comprises a device main body, an upper window assembly, a lower window assembly and two elastic test probes; the device main body is provided with a slot structure, and the slot structure is used for inserting a battery pole piece or a metal sheet; the upper window assembly and the lower window assembly are respectively arranged at the upper end and the lower end of the slot structure and are in sealing connection with the device main body; the two elastic test probes are respectively arranged on two sides of the device main body and are in contact with the battery pole piece or the metal sheet in the slot structure.
The slot structure is the through groove of I shape structure, including inserted sheet groove I, inserted sheet groove II and intercommunication groove, wherein the intercommunication groove is located between inserted sheet groove I and inserted sheet groove II to both ends communicate with inserted sheet groove I and inserted sheet groove II respectively.
The inserting piece groove I and the inserting piece groove II are parallel to each other and are equal in length; the length of the communicating groove is less than one fourth of the length of the inserting piece groove I and the length of the inserting piece groove II.
The depth of the slot structure is more than twice of the length of the communication slot.
Two opposite sides of the device main body are provided with two detection holes respectively communicated with the insert groove I and the insert groove II, and the two elastic test probes are respectively inserted into the two detection holes.
One end of the elastic test probe is an elastic telescopic probe head part extending into the device main body, and the other end of the elastic test probe is a wire connecting part extending out of the device main body; the detection holes on the two sides of the device main body are of a stepped hole structure, and the lead connecting part of the elastic test probe is in threaded connection with the detection holes through a stud.
The upper end face of the device main body is provided with a groove, and the slot structure is arranged at the bottom of the groove; the upper window assembly is arranged in the groove.
The upper window assembly comprises an upper glass sheet and an upper pressing sheet, wherein the upper glass sheet is arranged above the slot structure, and an upper sealing ring is arranged between the upper glass sheet and the bottom of the groove; the upper pressing sheet is arranged in the groove and fixedly connected with the device main body, and the upper pressing sheet is used for pressing the upper glass sheet.
The upper pressing piece comprises a connecting part of a hollow structure and a limiting end plate arranged at one end of the connecting part, the connecting part is in threaded connection with the groove, and the limiting end plate is connected with the upper end face of the device main body through an upper fixing screw.
The lower window assembly comprises a lower glass sheet and a lower pressing sheet, wherein the lower glass sheet is arranged at the lower end of the slot structure and is pressed tightly through the lower pressing sheet, and the lower pressing sheet is fixedly connected with the device main body through a lower fixing screw; and a lower sealing ring is arranged between the lower glass sheet and the device main body.
The utility model has the advantages and beneficial effects that: the utility model provides a pair of device of normal position observation and measurement electrochemistry sets up slot structure in the device main part, realizes recording battery in the growth condition of practical application in-process lithium dendrite through optimizing slot structure, can measure its electrochemistry relevant information to the interact between battery pole piece and the electrolyte simultaneously.
The device for in-situ observation and measurement of electrochemistry provided by the utility model has a simple structure, the slot structure adopts an I shape, wherein the inserting piece groove I and the inserting piece groove II are parallel to each other and have a closer distance, which is beneficial to the mutual infiltration of the actual electrolytes; meanwhile, the lengths and the slotting depths of the inserting piece groove I and the inserting piece groove II are more than twice of those of the communicating groove, so that a stable electric field can be formed between the inserting piece groove I and the inserting piece groove II, the electric field is consistent with an actual battery, and the testing accuracy is ensured; the I-shaped groove penetrates up and down, the bottom of the I-shaped groove is made of transparent glass, light can be supplemented from the top, observation can be conducted from the bottom, observation can also be conducted directly from the bottom, and the multi-view-angle light source is suitable for various observation requirements.
Drawings
FIG. 1 is an isometric view of an apparatus for in situ observation and measurement of electrochemistry according to the present invention;
FIG. 2 is an exploded view of the apparatus for in situ observation and measurement of electrochemistry according to the present invention;
fig. 3 is one of perspective views of the device body of the present invention;
fig. 4 is a second perspective view of the device body of the present invention;
fig. 5 is a bottom view of the device body of the present invention;
fig. 6 is a middle sectional view of the device body of the present invention;
fig. 7 is a partial sectional view of the device body according to the present invention;
fig. 8 is an isometric view of an upper press plate of the present invention;
fig. 9 is a schematic structural diagram of a middle elasticity test probe according to the present invention;
fig. 10 is an isometric view of a medium elasticity test probe of the present invention.
In the figure: the device comprises a device body 1, a groove 101, a slot 102, a plug groove I1021, a communicating groove 1022, a plug groove II 1023, an upper sealing groove 103, an upper connecting hole 104, a detection hole 105, a lower sealing groove 106, a lower connecting hole 107, an upper sealing ring 2, a lower sealing ring 3, an upper glass sheet 4, a lower glass sheet 5, an upper pressing sheet 6, a connecting part 601, a limiting end plate 602, a lower pressing sheet 7, an elasticity test probe 8, a stud 9, an upper fixing screw 10 and a lower fixing screw 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the device for in-situ observing and measuring electrochemistry provided by the present invention comprises a device main body 1, an upper window assembly, a lower window assembly and two elastic test probes 8, wherein the device main body 1 is provided with a slot structure 102, and the slot structure 102 is used for inserting a battery pole piece or a metal sheet; the upper window assembly and the lower window assembly are respectively arranged at the upper end and the lower end of the slot structure 102 and are hermetically connected with the device main body 1; the two elastic test probes 8 are respectively disposed on two sides of the device body 1 and are in contact with the battery pole pieces or metal pieces in the slot structure 102.
As shown in fig. 3, in the embodiment of the present invention, a groove 101 is formed on the upper end surface of the device main body 1, and the slot structure 102 is disposed at the bottom of the groove 101; as shown in fig. 1, the upper window assembly is disposed within the recess 101.
As shown in fig. 2-3, in the embodiment of the present invention, the upper window assembly includes an upper glass sheet 4 and an upper pressing sheet 6, wherein the upper glass sheet 4 is disposed above the slot structure 102, an upper sealing ring 2 is disposed between the upper glass sheet 4 and the bottom of the groove 101, and the upper sealing ring 2 is accommodated in an upper sealing groove 103 disposed at the bottom of the groove 101; the upper pressing sheet 6 is arranged in the groove 101 and is fixedly connected with the device body 1, and the upper pressing sheet 6 is used for pressing the upper glass sheet 4.
As shown in fig. 3 and 8, the upper pressing plate 6 includes a connecting portion 601 with a hollow structure and a limiting end plate 602 disposed at one end of the connecting portion 601, the connecting portion 601 is connected with the groove 101 by a screw thread, and the hollow structure of the connecting portion 601 is convenient for light transmission and observation. The four corners of the limiting end plate 602 are provided with fixing holes, the upper end face of the device main body 1 is provided with upper connecting holes 104, the limiting end plate 602 is connected with the upper connecting holes 104 of the device main body 1 through upper fixing screws 10 penetrating through the fixing holes, fixed connection between the upper pressing sheet 6 and the device main body 1 is achieved, and therefore the upper glass sheet 4 is pressed tightly.
As shown in fig. 2 and 4, in the embodiment of the present invention, the lower window assembly includes a lower glass sheet 5 and a lower pressing sheet 7, wherein the lower glass sheet 5 is disposed at the lower end of the slot structure 102 and is pressed by the lower pressing sheet 7. The bottom of the device main body 1 is provided with a lower sealing groove 106 and a lower connecting hole 107 positioned at the outer side of the lower sealing groove 106, and the lower pressing sheet 7 is fixedly connected with the lower connecting hole 107 on the device main body 1 through a lower fixing screw 11; a lower seal ring 3 is provided between the lower glass sheet 5 and the apparatus main body 1, and the lower seal ring 3 is accommodated in a lower seal groove 106 provided in the lower end surface of the apparatus main body 1.
Specifically, the lower pressing sheet 7 is rigid, the thickness of the lower pressing sheet is smaller than 2mm, a large hole is formed in the middle of the lower pressing sheet, light transmission and observation are facilitated, and fixing holes are formed in the periphery of the lower pressing sheet.
As shown in fig. 5-6, in the embodiment of the present invention, the slot structure 102 is an i-shaped slot and is through from top to bottom, and includes an insertion slot i 1021, an insertion slot ii 1023 and a communication slot 1022, wherein the communication slot 1022 is located between the insertion slot i 1021 and the insertion slot ii 1023, and both ends of the communication slot are respectively communicated with the insertion slot i 1021 and the insertion slot ii 1023.
Specifically, the insertion groove I1021 and the insertion groove II 1023 are parallel to each other and have the same length, and the communication groove 1022 is perpendicular to the insertion groove I1021 and the insertion groove II 1023; the length of the communication groove 1022 is less than one fourth of the length of the insertion groove I1021 and the insertion groove II 1023, so that a stable electric field is formed between the insertion groove I1021 and the insertion groove II 1023 along the length direction of the communication groove 1022. Preferably, the length of the communication groove 1022 is at most 2 mm.
Further, the depth of the socket structure 102 is greater than twice the length of the communication groove 1022, so that a stable electric field is formed in the depth direction of the socket structure 102.
As shown in fig. 5 to 7, two detection holes 105 respectively communicating with the insertion groove i 1021 and the insertion groove ii 1023 are formed in opposite sides of the apparatus body 1, and the two elastic test probes 8 are respectively inserted into the two detection holes 105.
As shown in fig. 5 and 9-10, one end of the elastic test probe 8 is an elastic retractable probe head part extending into the device body 1, and the other end is a wire connection part extending out of the device body 1, and the wire connection part is used for connecting an electrochemical workstation, a digital power supply and other test equipment; the detection holes 105 on the two sides of the device main body 1 are of a stepped hole structure, the lead connecting part of the elastic test probe 8 is in threaded connection with the detection holes 105 through a stud 9, and the head part of the elastic telescopic probe is abutted to a battery pole piece or a metal sheet inserted into the insertion sheet groove I1021 or the insertion sheet groove II 1023.
As shown in fig. 5, in the embodiment of the present invention, the detecting holes 105 on both sides of the device body 1 are respectively disposed at both ends of the slot structure 102 and are parallel to each other. Wherein the detection hole 105 of one side communicates with the one end tip of picture peg groove I1021, and the detection hole 105 of opposite side communicates with the other end tip of picture peg groove II 1023, and two detection holes 105 are the symmetric distribution with slot structure 102's center promptly, make two elasticity test probe 8 intercommunication electrochemistry workstations that insert in the detection hole 105 after, form stable electric field between picture peg groove I1021 and picture peg groove II 1023.
In operation, upper pressing plate 6 and lower pressing plate 7 are respectively connected with device body 1 through upper fixing screw 10 and lower fixing screw 11 to compress upper glass sheet 4 and lower glass sheet 5, and the growth condition of lithium dendrite can be observed from the position of lower glass sheet 5 through a microscope.
Example one
The method comprises the following steps of taking two lithium metal sheets as counter electrodes, observing the growth condition of lithium metal dendrites under a microscope, and specifically:
when the device is used, the lower sealing ring 3 is arranged in the lower sealing groove 106 at the lower end of the device main body 1, the lower glass sheet 5 and the lower pressing sheet 7 are sequentially pressed, and the lower fixing screw 11 is screwed, so that the lower end face of the device main body 1 is sealed.
A square metal lithium sheet is respectively inserted into the I-shaped groove of the device main body 1 and the part of the inserting sheet groove I1021 and the inserting sheet groove II 1023.
The two elastic test probes 8 are respectively screwed into the detection holes 105 on the two sides of the device body 1 through the studs 9, so that the tips of the elastic test probes 8 abut against the metal lithium sheets in the I-shaped grooves.
Adding electrolyte into the I-shaped groove: propylene carbonate.
An upper sealing ring 2 is arranged in a groove 101 on the upper end surface of a device main body 1, an upper glass sheet 4 is placed in the groove 101 of the device main body 1 to cover the upper sealing ring 2, an upper pressing sheet 6 is placed in the groove 101 of the device main body 1, an upper fixing screw 10 is screwed, and the sealing of the whole device is completed.
And (4) placing the device under a microscope, and adjusting the focal length to ensure that the edge of the metal lithium sheet in the I-shaped groove is clearly visible.
And connecting the outer ends of the two elastic test probes 8 with a charge-discharge tester, performing charge-discharge circulation, and observing the growth condition of the metal lithium dendrite under a microscope.
Example two
The counter electrode is used by the battery pole piece and the metal platinum sheet, and the electrochemical information of the interaction of the battery pole piece and the electrolyte is measured, and the method comprises the following specific steps:
when the device is used, the lower sealing ring 3 is arranged in the groove at the lower end of the device main body 1, then the lower glass sheet 5 and the lower pressing sheet 7 are sequentially pressed, the lower fixing screw 1 is tightened at the lower end of the device main body 1, and the lower end face of the device main body 1 is sealed.
A square battery pole piece is inserted into the insertion groove I1021 in the I-shaped groove of the device main body 1, and a metal platinum piece with the same size is inserted into the insertion groove II 1023 to be used as a counter electrode.
Two elastic test probes 8 are screwed into the detection holes 105 on the two sides of the device main body 1 through the studs 9 respectively, so that the tips of the two elastic test probes 8 respectively support a battery pole piece in the inserting piece groove I1021 and a metal platinum piece in the inserting piece groove II 1023.
Adding electrolyte into the I-shaped groove: EC (ethylene carbonate) and DMC (dimethyl carbonate) mixed solution.
An upper sealing ring 2 is arranged in a groove 101 on the upper end surface of a device main body 1, an upper glass sheet 4 is placed in the groove 101 of the device main body 1 to cover the upper sealing ring 2, an upper pressing sheet 6 is placed in the groove 101 of the device main body 1, a fixing screw 10 is screwed on the device main body 1, and the sealing of the whole device is completed.
The outer ends of the two elastic test probes 8 are connected with an electrochemical workstation, and the electrochemical information of the interaction of the battery pole piece and the electrolyte is measured.
The device for in-situ observation and measurement of electrochemistry provided by the utility model has a simple structure, the slot structure adopts an I shape, wherein the inserting piece groove I and the inserting piece groove II are parallel to each other and have a closer distance, which is beneficial to the mutual infiltration of the actual electrolytes; meanwhile, the lengths and the slotting depths of the inserting piece groove I and the inserting piece groove II are more than twice of those of the communicating groove, so that a stable electric field can be formed between the inserting piece groove I and the inserting piece groove II, the electric field is consistent with an actual battery, and the testing accuracy is ensured; the I-shaped groove penetrates up and down, the bottom of the I-shaped groove is made of transparent glass, light can be supplemented from the top, observation can be conducted from the bottom, observation can also be conducted directly from the bottom, and the multi-view-angle light source is suitable for various observation requirements.
The utility model discloses an optimize slot structure, realize the growth condition of recording battery lithium dendrite in the practical application process, can measure its electrochemistry relevant information to the interact between battery pole piece and the electrolyte simultaneously.
The above description is only for the embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims (10)
1. The device for observing and measuring electrochemistry in situ is characterized by comprising a device main body (1), an upper window assembly, a lower window assembly and two elastic test probes (8);
the device main body (1) is provided with a slot structure (102), and the slot structure (102) is used for inserting a battery pole piece or a metal sheet;
the upper window assembly and the lower window assembly are respectively arranged at the upper end and the lower end of the slot structure (102) and are in sealing connection with the device main body (1);
the two elastic test probes (8) are respectively arranged on two sides of the device main body (1) and are in contact with a battery pole piece or a metal sheet in the slot structure (102).
2. The device for in-situ observation and measurement of electrochemistry according to claim 1, wherein the slot structure (102) is a through slot of an I-shaped structure, and comprises a slot I (1021), a slot II (1023) and a communication slot (1022), wherein the communication slot (1022) is located between the slot I (1021) and the slot II (1023), and two ends of the communication slot are respectively communicated with the slot I (1021) and the slot II (1023).
3. The device for in situ observation and measurement of electrochemistry of claim 2, wherein said insert grooves i (1021) and ii (1023) are parallel and of equal length; the length of the communication groove (1022) is less than one fourth of the lengths of the insertion groove I (1021) and the insertion groove II (1023).
4. The device for in situ observation and measurement of electrochemistry according to claim 2, wherein the depth of the slot structure (102) is more than twice the length of the communication groove (1022).
5. The apparatus for in-situ observation and measurement of electrochemistry according to claim 2, wherein two detection holes (105) respectively communicating with the insertion groove i (1021) and the insertion groove ii (1023) are formed at opposite sides of the apparatus body (1), and the two elastic test probes (8) are respectively inserted into the two detection holes (105).
6. The device for in-situ observation and measurement of electrochemistry according to claim 5, wherein one end of the elastic test probe (8) is an elastic telescopic probe head part extending into the device body (1), and the other end is a wire connecting part extending out of the device body (1);
the device is characterized in that the detection holes (105) on the two sides of the device body (1) are of a stepped hole structure, and the lead connecting part of the elastic test probe (8) is in threaded connection with the detection holes (105) through a stud (9).
7. The device for in-situ observation and measurement of electrochemistry according to claim 2, wherein the upper end face of the device body (1) is provided with a groove (101), and the slot structure (102) is arranged at the bottom of the groove (101); the upper window assembly is disposed within the recess (101).
8. The device for in situ observation and measurement of electrochemistry according to claim 7, wherein the upper window assembly comprises an upper glass sheet (4) and an upper pressing sheet (6), wherein the upper glass sheet (4) is arranged above the slot structure (102), and an upper sealing ring (2) is arranged between the upper glass sheet (4) and the bottom of the groove (101); the upper pressing sheet (6) is arranged in the groove (101) and is fixedly connected with the device main body (1), and the upper pressing sheet (6) is used for pressing the upper glass sheet (4).
9. The device for in-situ observation and measurement of electrochemistry according to claim 8, wherein the upper pressing plate (6) comprises a connecting part (601) with a hollow structure and a limit end plate (602) arranged at one end of the connecting part (601), the connecting part (601) is in threaded connection with the groove (101), and the limit end plate (602) is connected with the upper end surface of the device body (1) through an upper fixing screw (10).
10. The device for in-situ observation and measurement of electrochemistry according to claim 1, wherein the lower window assembly comprises a lower glass sheet (5) and a lower pressing sheet (7), wherein the lower glass sheet (5) is arranged at the lower end of the slot structure (102) and is pressed by the lower pressing sheet (7), and the lower pressing sheet (7) is fixedly connected with the device body (1) through a lower fixing screw (11); a lower sealing ring (3) is arranged between the lower glass sheet (5) and the device main body (1).
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| CN202020540597.XU CN212275654U (en) | 2020-04-14 | 2020-04-14 | Device for in-situ observation and measurement of electrochemistry |
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| CN202020540597.XU CN212275654U (en) | 2020-04-14 | 2020-04-14 | Device for in-situ observation and measurement of electrochemistry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588645A (en) * | 2021-08-05 | 2021-11-02 | 南京航空航天大学 | In-situ microscopic imaging device for metal negative electrode battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588645A (en) * | 2021-08-05 | 2021-11-02 | 南京航空航天大学 | In-situ microscopic imaging device for metal negative electrode battery |
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