CN214845664U

CN214845664U - Battery test auxiliary device and battery test device

Info

Publication number: CN214845664U
Application number: CN202120638443.9U
Authority: CN
Inventors: 王磊; 黄海强; 李瑞杰; 陈少杰
Original assignee: Svolt Energy Technology Wuxi Co Ltd
Current assignee: Svolt Energy Technology Wuxi Co Ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-11-23
Anticipated expiration: 2031-03-29

Abstract

The utility model provides a battery test auxiliary device and a battery test device, wherein the battery test auxiliary device comprises a support body, a lower insulator, an upper insulator, a pressure device and two leading-out ends; the lower insulator is positioned on the support body; a lower accommodating cavity matched with the negative pole piece is formed on the lower insulator so as to accommodate the stacked negative pole piece and the electrolyte membrane; the upper insulator is positioned above the lower insulator and is provided with an upper accommodating cavity matched with the positive plate, and the positive plate is kept to be in contact with the electrolyte membrane above the electrolyte membrane; a pressing device acting on the test body to press and hold the test body in a thickness direction; the two leading-out ends are insulated and isolated from each other, form electric contact with the negative plate and the positive plate respectively, and are led out from the negative plate and the positive plate. Battery test auxiliary device, can be convenient for test full solid-state battery to can effectively prevent the emergence of short circuit problem in the test that leads to because of the contact of positive plate and negative pole piece.

Description

Battery test auxiliary device and battery test device

Technical Field

The utility model relates to the technical field of power battery testing, in particular to a battery testing auxiliary device; and simultaneously, the utility model discloses still relate to a battery test device who has this battery test auxiliary device.

Background

The solid-state battery adopts non-flammable solid electrolyte to replace flammable organic liquid electrolyte, so that the safety of a battery system is greatly improved, and the synchronous improvement of energy density is realized. Among various new battery systems, solid-state batteries are the next-generation technology closest to the industry, which has become a consensus of the industry and the scientific community.

The sulfide electrolyte has higher lithium ion conductivity, and the ion conductivity is close to or even exceeds that of the organic electrolyte at room temperature. Meanwhile, the battery has the characteristics of high thermal stability, good safety performance and wide electrochemical stability window, and has outstanding advantages in the aspects of high power and high and low temperature solid batteries.

However, when the sulfide solid electrolyte is used for preparing the all-solid-state battery, the sulfide electrolyte belongs to ceramic materials, and the inside of the prepared soft package battery is in solid-solid contact. Therefore, impedance is generated between the electrolytes themselves, between the electrolyte and the conductive agent, between the electrolyte and the active material, between the conductive agent and the active material, or between the electrode and the electrolyte membrane due to poor interface contact. Based on this, in the test or use of the all-solid-state battery, in order to ensure the performance of the battery, a certain pressure is usually applied to the outside of the battery.

At present, before the soft package battery is assembled, a battery mould is used for assembling a half battery to test the positive electrode or the negative electrode, and the battery performance is tested by assembling a full battery, wherein the tests are all tested under the condition that the battery mould keeps a certain pressure.

When the performance of the die battery is tested by simulating the soft package battery by using each part of the soft package battery, an independent electrolyte membrane is prepared by wet coating or dry rolling, and a positive plate and a negative plate are respectively placed on two sides of the electrolyte membrane. Due to the fact that the structural design of the testing device is unreasonable, and the electrolyte membrane is thin, under the conditions of medium pressure and high pressure, the positive current collector and the negative current collector are irregularly stretched and contacted, and therefore the battery is short-circuited. In addition, under high shear force, the edges of the electrolyte membrane and the negative plate are easy to lift, and the short circuit of the battery can also be caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a battery test auxiliary device to test full solid-state battery, and effectively prevent the emergence of short circuit problem.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a battery test assisting apparatus for stacking a negative electrode tab, an electrolyte membrane, and a positive electrode tab of an all-solid battery into a test body and holding them for testing, the assisting apparatus comprising:

a support body;

a lower insulator positioned on the support body; a lower accommodating cavity matched with the negative pole piece is formed on the lower insulator so as to accommodate the stacked negative pole piece and the electrolyte membrane;

an upper insulator located above the lower insulator; an upper accommodating cavity matched with the positive plate is formed on the upper insulator to accommodate the positive plate and keep the positive plate to be in contact with the electrolyte membrane above the electrolyte membrane;

a pressing device that acts on the test body to press and hold the test body in a thickness direction;

the two leading-out ends are insulated and isolated from each other, respectively form electric contact with the negative plate and the positive plate, and are led out from the negative plate and the positive plate for testing.

Further, the upper insulator is inserted into the lower receiving chamber from the top of the lower insulator in a form of insertion and is pressed against the upper surface of the electrolyte membrane stacked above the negative electrode tab.

Further, the upper accommodating cavity is a through hole formed in the upper insulator along the vertical direction; the pressure device comprises a top plate which is positioned above the upper insulator and is adjustable in height, and an upper top column which is fixedly connected below the top plate and is inserted into the upper accommodating cavity from the upper part of the upper insulator; and the height of the top plate is adjusted to adjust the downward pressure of the upper top column for pressing the positive plate.

Furthermore, a spring is sleeved on the upper top column, one end of the spring is arranged on the lower surface of the top plate in an overhead mode, and the other end of the spring is arranged on the upper surface of the upper insulator in an overhead mode.

Furthermore, the upper top column is made of conductive materials so as to form the leading-out end matched with the positive plate.

Furthermore, a plurality of screw rods are arranged on the circumference of the upper insulator, each screw rod penetrates through the support body and the top plate in the vertical direction, and the height of the top plate is adjusted based on the screwing depth of a nut matched with the screw rod.

Furthermore, the screw rod is connected with the support body in an insulating fit mode.

Further, the lower accommodating cavity is a through hole formed in the lower insulator along the vertical direction; and the support body is provided with a lower top column which is inserted into the lower accommodating cavity from the bottom of the lower insulator and is supported at the bottom of the negative plate.

Further, the lower top pillar is made of a conductive material to form the leading-out end matched with the negative plate.

Compared with the prior art, the utility model discloses following advantage has:

(1) the battery test auxiliary device of the utility model can effectively prevent the short circuit problem caused by the contact of the positive plate and the negative plate in the test process while being convenient for accommodating the stacked negative plate, the electrolyte membrane and the positive plate by arranging the lower accommodating cavity matched with the negative plate on the lower insulator and the upper accommodating cavity matched with the positive plate on the upper insulator; the test body and the two leading-out ends are compressed by arranging the pressing device, so that the all-solid-state battery can be tested conveniently; the auxiliary device for testing the battery is beneficial to improving the testing precision and the testing efficiency of the all-solid-state battery.

(2) Through the insertion of the upper insulator in the lower accommodating cavity and the pressing and releasing of the upper surface of the electrolyte membrane, the assembly of a test body with the negative plate larger than the positive plate can be realized, and the assembly is closer to a soft package battery; meanwhile, the tilting of the edges of the electrolyte membrane and the negative plate can be effectively prevented, and the short circuit problem of the battery can be further avoided.

(3) The upper insulator is provided with the through hole as the upper accommodating cavity, so that the structure is simple, the design and implementation are convenient, and the use effect is good; and the arrangement of the upper top column in the pressure applying device is beneficial to applying pressure to the positive plate.

(4) Through setting up the spring, can push down the insulator when last fore-set applys down pressure to the positive plate to keep the insulator cartridge state of holding the intracavity under, and do benefit to the stability that improves the test body in the test.

(5) The upper top column and the lower top column are made of conductive materials respectively, so that the arrangement of leading-out ends is facilitated, and the utilization rate of the structure can be improved.

(6) The screw and the nut are simple in structure, are convenient to set on the supporting body and the top plate, and are beneficial to adjusting the height of the top plate.

(7) The screw rod and the support body are in an insulated matching mode, so that the short circuit problem can be effectively prevented. The lower accommodating cavity adopts a structural form of a through hole, so that the lower accommodating cavity is convenient to machine and form on the lower insulator; the arrangement of the upper and lower support columns of the support body is beneficial to improving the supporting effect on the negative plate and the electrolyte membrane.

Another object of the utility model is to provide a battery testing arrangement for test all solid-state battery, including the electric connection in two test circuit of drawing forth between the end, still include as above battery test auxiliary device.

Battery testing arrangement, draw forth the test circuit between the end through setting up electric connection in two, and as above battery test auxiliary device, can do benefit to the test that realizes all solid-state batteries to better test effect has.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a battery test assisting apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a support body and a lower insulator according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a pressing device and an upper insulator according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the pressing device, the upper insulator and the spring according to the embodiment of the present invention;

description of reference numerals:

1. a support body; 101. a lower top pillar; 102. a first mounting hole; 103. an insulating sleeve;

2. a top plate; 201. an upper top pillar; 202. a second mounting hole;

3. a spring;

4. an upper insulator; 401. an upper receiving cavity;

5. a lower insulator; 501. a lower receiving chamber;

6. a screw;

7. and a nut.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are to be construed as indicating or implying any particular importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present embodiment relates to a battery test assisting apparatus for stacking and holding a negative electrode sheet, an electrolyte membrane, and a positive electrode sheet of an all-solid battery into a test body for testing. The auxiliary device comprises a supporting body, a lower insulator, an upper insulator, a pressure applying device and two leading-out ends.

Wherein, the lower insulator is positioned on the support body; and a lower accommodating cavity matched with the negative pole piece is formed on the lower insulator so as to accommodate the stacked negative pole piece and the electrolyte membrane. The upper insulator is positioned above the lower insulator; an upper receiving cavity matched with the positive plate is formed on the upper insulator to receive the positive plate and keep the positive plate to be in contact with the electrolyte membrane above the electrolyte membrane. And a pressing device acts on the test body to press and hold the test body in the thickness direction. Meanwhile, the two leading-out ends are insulated and isolated from each other, form electric contact with the negative plate and the positive plate respectively, and are led out from the negative plate and the positive plate for testing.

Based on the above design concept, an exemplary structure of the battery test assistance apparatus described in the present embodiment is shown in fig. 1. The structure of the lower insulator 5 and the support body 1 is shown with reference to fig. 2, in which the lower receiving cavity 501 on the lower insulator 5 is a through hole formed in the lower insulator 5 in the vertical direction. Here, the simple structure of through-hole, the machine-shaping of being convenient for, and when negative pole piece and electrolyte membrane received the holding down force, can also play certain restraint effect to negative pole piece and electrolyte membrane.

It should be noted that the electrolyte membrane in this embodiment is prepared by wet coating or dry rolling, which is beneficial to saving the assembly cost of the test body and reducing the generation of pollutants during the test compared with the solution of using sulfide electrolyte.

Preferably, the radial cross section of the lower receiving cavity 501 in this embodiment is circular, and the shape and area thereof are the same as those of the negative electrode sheet and the electrolyte membrane to match the negative electrode sheet. For the convenience of processing, the outer wall of the lower insulator 5 is also cylindrical in this embodiment.

It is understood that the cross-sectional shape of the lower receiving cavity 501 in this embodiment may be square, rectangular, oval, polygonal, etc. besides the circular shape, however, the shapes of the negative electrode sheet and the electrolyte membrane should be changed adaptively as long as it is ensured that the lower receiving cavity 501 and the negative electrode sheet are kept matched. Of course, the outer wall of the lower insulator 5 may have a rectangular parallelepiped shape, a square shape, or the like, in addition to the columnar shape. In addition, the lower insulator 5 may be made of any one of polyether ketone, ceramic, teflon, acryl, etc. to have a good insulating effect.

With continued reference to fig. 2, the support body 1 in this embodiment, as a load-bearing base body of the lower insulator 5, is circular in shape as a whole. In a preferred embodiment, the support body 1 is provided with a lower top pillar 101 inserted into the lower accommodating cavity 501 from the bottom of the lower insulator 5 and supported on the bottom of the negative electrode sheet.

Wherein the lower top pillar 101 is located at the center of the support body 1. In order to improve the supporting effect of the lower top pillar 101 on the negative plate, the diameter of the lower top pillar 101 is the same as that of the lower accommodating cavity 501. In this way, the lower insulator 5 can abut on the upper surface of the support body 1 by the insertion of the lower stem 101 into the lower receiving cavity 501, and positioning on the support body 1 is achieved. In the above-described stacked negative electrode sheet and electrolyte membrane, the lower surface of the negative electrode sheet is in contact with the top end surface of the lower knock-out post 101, and the electrolyte membrane is placed on the upper surface of the negative electrode sheet.

The upper insulator 4 in this embodiment is inserted in the lower receiving chamber 501 from the top of the lower insulator 5 in the form of a cartridge, and is pressed against the upper surface of the electrolyte membrane stacked above the negative electrode tab. Here, by the insertion of the upper insulator 4 in the lower receiving chamber 501 and the pressure release on the upper surface of the electrolyte membrane, the assembly and testing of the test body having the negative electrode tab larger than the positive electrode tab can be achieved, so that the test body is structurally closer to the pouch cell. In specific implementation, the upper insulator 4 may be made of any one of polyether ketone, ceramic, teflon, acrylic, and the like, so as to have a good insulating effect.

The upper insulator 4 of this embodiment is structured as shown in fig. 3, and the upper receiving chamber 401 is a through hole formed in the upper insulator 4 in the vertical direction. The guide device is simple in structure, convenient to design and implement and capable of guiding the placement of the positive plate. In addition, the edges of the negative plate and the electrolyte membrane are pressed by the bottom end of the upper insulator 4, so that the electrolyte membrane and the edges of the negative plate can be effectively prevented from tilting, and the short circuit problem of the test body is further avoided.

Preferably, in the embodiment, the corresponding diameter of the outer wall of the upper insulator 4 is matched with the diameter of the lower accommodating cavity 501, so as to ensure the insertion effect of the upper insulator 4 in the lower accommodating cavity 501, and thus, the consistency and stability of the positive pole pieces in the assembling process are improved.

It should be noted that the upper insulator 4 in the present embodiment may be disposed to protrude from the lower insulator 5 as shown in fig. 1, or may be entirely housed in the lower housing chamber 501. As long as the requirement for assembling the positive electrode tab can be satisfied, and the bottom end of the spring 3 described below can abut against the upper surface of the upper insulator 4.

The pressing device in this embodiment comprises a top plate 2 which is positioned above the upper insulator 4 and is adjustable in height, and an upper top column 201 which is fixedly connected below the top plate 2 and is inserted into the upper accommodating cavity 401 from above the upper insulator 4; the height of the top plate 2 is adjusted to adjust the downward pressure of the upper top column 201 for pressing the positive plate.

As shown in fig. 3, the top plate 2 in the present embodiment has a circular shape, and the upper stem 201 is located at the center of the top plate 2. The diameter of going up fore-set 201 is unanimous with the diameter that holds chamber 401 on, and when last fore-set 201 pushed down positive plate like this, the overdraft can be used whole positive plate uniformly on, and does benefit to the precision that improves the test, meanwhile, still is convenient for place the middle part at the negative pole piece with positive plate to do benefit to the uniformity of guaranteeing the test body in the equipment.

To facilitate adjustment of the height of the top plate 2, as shown in fig. 1 to 3, four bolts are provided in the circumferential direction of the upper insulator 4, a screw 6 of each bolt penetrates the support body 1 and the top plate 2 in the vertical direction, and the height of the top plate 2 is adjusted based on the screwing depth of a nut 7 matched with the screw 6. In specific implementation, the four screws 6 are arranged around the upper insulator 4 at equal intervals in the circumferential direction, so that the uniformity and stability in the force application process are improved. Of course, the number of bolts in the present embodiment can be adjusted according to specific use requirements.

In the present embodiment, four first mounting holes 102 are provided in the support body 1 and four second mounting holes 202 are provided in the top plate 2 corresponding to the respective screws 6. The screw 6 passes through the first mounting hole 102 and the second mounting hole 202 in sequence and then is connected with the nut 7 in a threaded manner. The head of the bottom end of each bolt is ensured to be abutted against the support body 1, and the nut 7 is abutted against the top plate 2.

It can be understood that the pressing force applied during the assembling process of the testing body can be adjusted adaptively according to specific use requirements, and the pressure maintaining machine can be used for maintaining pressure after the assembling is completed, so that the testing body can be tested conveniently.

As shown in fig. 1 and 4, in the present embodiment, the spring 3 is fitted over the upper top pillar 201, and one end of the spring 3 is placed on the lower surface of the top plate 2 and the other end is placed on the upper surface of the upper insulator 4. So configured, when the height of the top plate 2 is adjusted to apply downward pressure to the positive plate, the spring 3 can be compressed by force and apply downward pushing force to the upper insulator 4, so as to facilitate the maintenance of the upper insulator 4 in the inserted state in the lower receiving cavity 501, and have better stability in use.

In addition, the inner diameter of the spring 3 is larger than or equal to the diameter of the upper support pillar 201, so that the spring 3 can be conveniently compressed and reset by being sleeved on the upper support pillar 201. In this embodiment, the length of the spring 3 is preferably 1.1 to 1.2 times the length of the upper support pillar 201, so as to apply a pushing force to the upper insulator 4.

The upper top pillar 201 in this embodiment is made of a conductive material to form the above-mentioned terminal matching with the positive electrode tab. The lower top pillar 101 is made of a conductive material to form the above-mentioned terminal matching the negative electrode tab. For the sake of distinction, in the present embodiment, the terminal in electrical contact with the positive electrode sheet is referred to as a positive electrode terminal, and the terminal in electrical contact with the negative electrode sheet is referred to as a negative electrode terminal.

In order to facilitate the arrangement of the positive lead-out terminal and the negative lead-out terminal, the top plate 2 and the support body 1 in this embodiment are also made of conductive materials, at this time, the positive lead-out terminal is the top plate 2, and the negative lead-out terminal is on the support body 1. The support body 1 and the top plate 2 have large areas, and are easier to be connected with an external conducting wire. It is understood that the positive terminal in this embodiment may also be a protrusion disposed on the top plate 2, and the negative terminal is a protrusion disposed on the supporting plate, so that the two terminals are respectively connected to the conductive wire.

In the specific embodiment, the top plate 2 and the upper top pillar 201 are made of the same material, and the support body 1 and the lower top pillar 101 are made of the same material, and both are preferably integrally formed. The positive leading-out end and the negative leading-out end can be clamped on the supporting body 1 and the top plate 2 by adopting an alligator clip in the prior art, and can also be connected on the supporting body 1 and the top plate 2 in an adhesive tape bonding mode.

In order to further improve the using effect of the auxiliary device for testing the battery, in the embodiment, the supporting body 1 and the lower top pillar 101, the top plate 2 and the upper top pillar 201 are all made of high-strength alloy steel, so that the structure is not deformed, collapsed and bent during the using process, and has better using stability.

Considering that the support body 1 and the top plate 2 are both made of conductive materials, in this embodiment, the screw 6 and the support body 1 are connected in an insulating fit manner. In particular, with continued reference to the illustration in fig. 1, an insulating sleeve 103 is respectively fitted inside each first mounting hole 102, the insulating sleeve 103 constituting, in the assembled state, an insulating separation between the outer wall of the screw 6 and the first mounting hole 102, and between the support body 1 and the head of the bolt.

It should be noted that the top plate 2 and the supporting body 1 in this embodiment may also be made of insulating materials, and in this case, in order to facilitate the connection between the negative terminal and the positive terminal and the external conductive wire, a first annular protrusion is disposed at the top of the top pillar 201, and the top end of the spring 3 abuts against the lower surface of the first annular protrusion, and in this case, the first annular protrusion constitutes the positive terminal. In addition, a second annular projection circumferentially arranged is provided on the outer periphery of the bottom of the lower top pillar 101, and the bottom surface of the lower insulator 5 inserted into the lower top pillar 101 abuts on the second annular projection. At this time, the second annular protrusion is the negative electrode leading-out terminal.

When the battery test auxiliary device in the embodiment is used, the following steps are executed:

firstly, sleeving a lower insulator 5 on a lower top column 101 of a support body 1, and then sequentially placing a negative plate and an electrolyte membrane in a lower accommodating cavity 501 of the lower insulator 5;

step two, inserting an upper insulator 4 into a lower accommodating cavity of a lower insulator 5, and then placing a positive plate into an upper accommodating cavity 401;

step three, inserting the upper support pillar 201 into the upper accommodating cavity 401, then installing the insulating sleeve 103 in the first installation hole 102, screwing the screw 6 through the first installation hole 102 and the second installation hole 202 by the nut 7, applying a screwing force according to actual requirements, and then maintaining pressure by a pressure maintaining machine;

and step four, connecting the positive electrode conducting wire to the positive electrode leading-out end, and connecting the negative electrode conducting wire to the negative electrode leading-out end.

According to the auxiliary device for testing the battery, the lower accommodating cavity 501 matched with the negative plate and the upper accommodating cavity 401 matched with the positive plate on the upper insulator 4 are arranged on the lower insulator 5, so that stacked test bodies can be accommodated conveniently, and meanwhile, the short circuit problem caused by the contact of the positive plate and the negative plate in the testing process can be effectively prevented; the test body and the two leading-out ends are compressed by arranging the pressing device, so that the all-solid-state battery can be tested conveniently; the auxiliary device for testing the battery is beneficial to improving the testing precision and the testing efficiency of the all-solid-state battery.

In addition, the test body assembled by the auxiliary device for testing the battery has the test performance closer to that of a soft package battery, can realize the representation of the performance of the all-solid battery, and has higher reference value for the design of the all-solid battery.

In addition, the embodiment also relates to a battery testing device which is used for testing the all-solid-state battery. In overall structure, the battery testing device comprises a testing circuit electrically connected between two leading-out terminals and also comprises the battery testing auxiliary device. The test circuit can adopt a circuit which is mature in the prior art and used for testing the battery according to specific test requirements, and the structure of the test battery is not repeated herein.

The battery testing device of the embodiment can be used for testing the all-solid-state battery by setting the testing circuit electrically connected between the two leading-out ends and the battery testing auxiliary device, and has a better testing effect.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery test assisting apparatus for stacking a negative electrode plate, an electrolyte membrane, and a positive electrode plate of an all-solid battery into a test body and holding them for testing, characterized by comprising:

a support body (1);

a lower insulator (5) positioned on the support body (1); a lower accommodating cavity (501) matched with the negative pole piece is formed on the lower insulator (5) so as to accommodate the stacked negative pole piece and the electrolyte membrane;

an upper insulator (4) located above the lower insulator (5); an upper accommodating cavity (401) matched with the positive plate is formed on the upper insulator (4) to accommodate the positive plate and keep the positive plate to be in contact with the electrolyte membrane above the electrolyte membrane;

2. The battery test aid of claim 1, wherein: the upper insulator (4) is inserted into the lower accommodating cavity (501) from the top of the lower insulator (5) in a plug-in manner and is pressed on the upper surface of the electrolyte membrane stacked above the negative electrode plate.

3. The battery test aid of claim 2, wherein: the upper receiving cavity (401) is a through hole formed in the upper insulator (4) in a vertical direction; the pressing device comprises a top plate (2) which is positioned above the upper insulator (4) and is adjustable in height, and an upper top column (201) which is fixedly connected below the top plate (2) and is inserted into the upper accommodating cavity (401) from above the upper insulator (4); the height of the top plate (2) is adjusted to adjust the downward pressure of the upper top column (201) for pressing the positive plate.

4. The battery test aid of claim 3, wherein: the upper top column (201) is sleeved with a spring (3), one end of the spring (3) is arranged on the lower surface of the top plate (2) in an overhead mode, and the other end of the spring (3) is arranged on the upper surface of the upper insulator (4) in an overhead mode.

5. The battery test aid of claim 3, wherein: the upper top column (201) is made of conductive materials so as to form the leading-out end matched with the positive plate.

6. The battery test aid of claim 3, wherein: a plurality of screw rods (6) are arranged in the circumferential direction of the upper insulator (4), each screw rod (6) penetrates through the support body (1) and the top plate (2) in the vertical direction, and the height of the top plate (2) is adjusted based on the screwing depth of a nut (7) matched with the screw rod (6).

7. The battery test aid of claim 6, wherein: the screw rod (6) is connected with the support body (1) in an insulating matching mode.

8. The battery test aid according to any one of claims 1 to 7, wherein: the lower accommodating cavity (501) is a through hole formed in the lower insulator (5) along the vertical direction; and a lower top column (101) which is inserted into the lower accommodating cavity (501) from the bottom of the lower insulator (5) and is supported at the bottom of the negative pole piece is arranged on the support body (1).

9. The battery test aid of claim 8, wherein: the lower top pillar (101) is made of a conductive material to form the leading-out end matched with the negative plate.

10. The utility model provides a battery testing arrangement for test all solid state battery, includes the test circuit of electric connection between two terminals of drawing forth, its characterized in that: further comprising the battery test aid of any one of claims 1 to 9.