CN220399610U

CN220399610U - Solid-state battery acupuncture heat generation testing arrangement

Info

Publication number: CN220399610U
Application number: CN202321901544.6U
Authority: CN
Inventors: 赵慧春; 刘延超; 乐波; 朱小毅; 周旭艳; 郭永奇; 毕然; 王勉
Original assignee: China Three Gorges Corp
Current assignee: China Three Gorges Corp
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2024-01-26
Anticipated expiration: 2033-07-18

Abstract

The utility model provides a solid-state battery needling heat generation testing device, which belongs to the technical field of battery detection and comprises a testing box, a needling assembly, a temperature measuring piece, a heating assembly and a controller, wherein a testing cavity is arranged in the testing box, the testing cavity is of a closed structure, and the testing cavity is suitable for placing a battery to be tested; the needling assembly is provided with a needling piece extending into the testing cavity, and the needling piece can move towards the direction of the battery to be tested; the temperature measuring piece is connected with the battery to be tested and is used for detecting the temperature of the battery to be tested; the heating component is used for heating the temperature in the test cavity; the controller is respectively and electrically connected with the temperature measuring piece and the heating component. The solid-state battery needling heat generation testing device provided by the utility model can accurately monitor the heat generation amount of the solid-state battery in the short circuit, has strong needling heat generation testing feasibility due to the slower heat generation rate of the solid-state battery, and can accurately evaluate the design and safety performance of the battery.

Description

Solid-state battery acupuncture heat generation testing arrangement

Technical Field

The utility model relates to the technical field of battery detection, in particular to a solid-state battery needling heat generation testing device.

Background

The development and industrialization of solid state lithium/sodium ion batteries is at a critical opportunity and is also facing unprecedented global competition. The solid-state battery adopts the nonflammable solid electrolyte to replace flammable and explosive organic electrolyte, is hopeful to realize high safety and long cycle under the condition of high energy density, but also faces the safety problem similar to the traditional lithium ion battery.

Firstly, the internal resistance of the solid-state battery is obviously larger than that of the traditional lithium ion battery, and the solid-state lithium ion battery still generates larger heat during high-power discharging or charging, so that the temperature of the battery is increased. Second, solid-state batteries do not mean absolute safety, and even solid-state electrolytes of high mechanical strength are still difficult to suppress the growth of lithium metal dendrites, resulting in rapid capacity fade and potential safety hazards for all-solid-state batteries. Finally, battery safety is a comprehensive index, and is closely related to battery design and battery production, and the problem of industrialization of the solid-state battery also causes hidden danger of the safety.

The needling test is a safety test for testing the internal short circuit bearing capacity of a battery, and the needling test of a solid-state battery at the present stage does not synchronously monitor the heat generated by the battery and cannot evaluate the battery performance and the battery design of the solid-state battery more accurately and comprehensively.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects that the heat generated by the battery is not synchronously monitored and the battery performance and the battery design of the solid-state battery cannot be more accurately and comprehensively evaluated when the solid-state battery in the prior art is subjected to the needling test, so that the solid-state battery needling heat generation testing device is provided.

In order to solve the above technical problems, the present utility model provides a solid-state battery needling heat generation testing device, comprising:

the test box is internally provided with a test cavity, the test cavity is of a closed structure, and the test cavity is internally suitable for placing a battery to be tested;

a needling assembly having a needling member extending into the test cavity, the needling member being movable in a direction toward the battery to be tested;

the temperature measuring piece is connected with the battery to be tested and is used for detecting the temperature of the battery to be tested;

a heating assembly for heating a temperature within the test cavity;

and the controller is respectively and electrically connected with the temperature measuring piece and the heating component.

Optionally, a bearing table is arranged in the testing cavity and used for bearing the battery to be tested, and a clamping piece used for fixing the battery to be tested is arranged on the bearing table.

Optionally, the bearing table is provided with a plane and an inward concave cambered surface, the plane is used for placing square batteries to be tested, and the cambered surface is used for placing cylindrical batteries to be tested.

Optionally, the bearing table is connected with a first driving device, and the bearing table is driven to move by the first driving device.

Optionally, the heating assembly includes:

the first heating piece is arranged inside the bearing table and is used for heating the bearing table;

the second heating piece is arranged on the test box and used for heating the temperature in the test cavity.

Optionally, the test box is one side and has open-ended structure, the opening part of test box is provided with sealed lid, the test box includes:

a housing;

the inner shell is arranged inside the outer shell, a heating cavity is formed between the inner shell and the outer shell, a heat preservation piece is arranged in the heating cavity, a second heating piece is arranged in the heating cavity, and the inner shell is made of a heat transfer material.

Optionally, the test box is of a cylindrical structure, the second heating element is arranged around the inner shell, and the second heating element is of a spiral or annular structure.

Optionally, the needling member is connected with a second driving device, and the needling member is driven to move towards the battery to be tested by the second driving device.

Optionally, an exhaust hole is arranged on the test box and is used for exhausting harmful gas in the test cavity.

Optionally, the method further comprises:

the fire-fighting assembly is connected with the testing cavity and is used for introducing fire-fighting gas into the testing cavity;

and the camera shooting assembly is arranged in the test cavity.

The technical scheme of the utility model has the following advantages:

1. according to the solid-state battery needling heat generation testing device provided by the utility model, the battery to be tested is placed in the testing cavity of the closed structure, the needling test is carried out by moving the needling member towards the battery to be tested, a short circuit occurs in the battery in the needling test process, a large amount of heat is generated, the temperature measuring member measures the temperature of the battery and transmits the measured temperature to the controller, the controller controls the heating assembly to work, and heats the testing cavity, so that the temperature rise of the battery to be tested and the temperature rise of the testing cavity are synchronous, the heat insulation environment is constructed by the arrangement of the heating assembly, inaccurate temperature monitoring caused by heat transfer is avoided, the heat generation amount of the solid-state battery in the short circuit can be accurately monitored, and the needling heat generation testing device has strong feasibility due to the slow heat generation rate of the solid-state battery, and can accurately evaluate the design and safety performance of the battery.

2. According to the solid-state battery needling heat generation testing device provided by the utility model, the bearing table for bearing the battery to be tested is arranged in the testing cavity, and the clamping piece for fixing the battery to be tested is arranged on the bearing table, so that the stability of the battery to be tested is ensured and the testing accuracy is improved in the testing process.

3. The solid-state battery needling heat generation testing device provided by the utility model has the advantages that the bearing table is provided with the plane and the concave cambered surface, the plane is used for placing square batteries to be tested, the cambered surface is used for placing cylindrical batteries to be tested, the universality is strong, and the solid-state battery needling heat generation testing device is suitable for testing batteries without shapes.

4. According to the solid-state battery needling heat generation testing device, the bearing table is connected with the first driving device, the first driving device drives the bearing table to move, batteries with different sizes are adapted to through driving of the bearing table, universality is high, more testing devices are not required to be arranged according to different models, and cost is reduced.

5. The utility model provides a solid-state battery needling heat generation testing device, which comprises a first heating component and a second heating component, wherein the first heating component is arranged in a bearing table and is used for heating the bearing table, the second heating component is arranged on a testing box and is used for heating a testing cavity, and the first heating component and the second heating component are arranged for constructing a heat insulation environment so as to avoid inaccurate temperature monitoring caused by heat transfer.

6. The utility model provides a solid-state battery needling heat generation testing device, wherein a testing box is of a structure with an opening at one side, a battery to be tested is placed into a testing cavity from the opening, the testing cavity is of a sealing structure due to the arrangement of a sealing cover, leakage of harmful gas generated in the testing process is avoided, the testing box comprises an outer shell and an inner shell arranged in the outer shell, a heating cavity is arranged between the inner shell and the outer shell, a heat preservation part and a second heating part are arranged in the heating cavity, the heat preservation part is arranged to avoid heat loss to the outside, the inner shell is made of a heat transfer material, the heat can be transferred into the testing cavity, the temperature in the testing cavity is uniformly improved through the inner shell, and the built environment can be used for more accurately measuring the generated heat of the battery.

7. According to the solid-state battery needling heat generation testing device provided by the utility model, the testing box is of a cylindrical structure, the second heating piece is arranged around the inner shell, the second heating piece is of a spiral or annular structure, and the arrangement of the cylindrical structure improves the temperature rising uniformity degree in the testing cavity.

8. According to the solid-state battery needling heat generation testing device provided by the utility model, the needling member is connected with the second driving device, the needling member is driven to move towards the battery to be tested through the second driving device, the needling test is automatically completed through the driving of the second driving device, manual operation is not needed, the danger is reduced, and the needling member can move different distances according to the batteries to be tested with different sizes, so that the universality is strong.

9. According to the solid-state battery needling heat generation testing device provided by the utility model, the exhaust hole is arranged on the testing box, and after the testing is finished, the harmful gas in the testing cavity is exhausted through the exhaust hole, so that pollution caused by the fact that the harmful gas overflows into the environment when the battery to be tested is taken out is avoided.

10. The solid-state battery needling heat generation testing device provided by the utility model further comprises a fire-fighting component and a camera shooting component, wherein the fire-fighting component is used for introducing fire-fighting gas into the testing cavity, so that rapid fire extinguishment can be realized, and the camera shooting component can monitor the battery behavior in the testing process.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a specific embodiment of a solid-state battery needling heat generation testing apparatus provided in an embodiment of the present utility model;

FIG. 2 is a side view of the seal cap of FIG. 1 after opening;

fig. 3 is a schematic structural diagram of a cylindrical battery to be tested placed on the carrying platform in fig. 1;

fig. 4 is a schematic structural diagram of a square battery to be tested placed on the carrying platform in fig. 1.

Reference numerals illustrate:

1. a test box; 2. a test cavity; 3. a battery to be tested; 4. a needling assembly; 5. a needling member; 6. a temperature measuring member; 7. a heating assembly; 8. a carrying platform; 9. a clamping piece; 10. a plane; 11. a cambered surface; 12. a first driving device; 13. a first heating member; 14. a second heating member; 15. a housing; 16. an inner case; 17. a heating chamber; 18. an exhaust hole; 19. a fire fighting assembly; 20. a camera assembly; 21. a second driving device; 22. sealing cover.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

According to the solid-state battery needling heat generation testing device, when the solid-state battery is subjected to needling test, heat generated by the solid-state battery is monitored, and due to the fact that the solid-state battery heating rate is low, needling heat generation testing feasibility is high, and battery design and safety performance can be accurately evaluated.

As shown in fig. 1 and fig. 2, a specific implementation manner of the solid-state battery needling heat-generating testing device provided in this embodiment includes a testing box 1, a needling assembly 4, a temperature measuring member 6, a heating assembly 7 and a controller, wherein a testing cavity 2 is provided in the testing box 1, the testing cavity 2 is a closed structure, and a battery 3 to be tested is suitable for being placed in the testing cavity 2; the needling assembly 4 has a needling member 5 extending into the test cavity 2, said needling member 5 being movable in the direction of the battery 3 to be tested; the temperature measuring piece 6 is connected with the battery 3 to be tested and is used for detecting the temperature of the battery 3 to be tested; a heating assembly 7 for heating the temperature inside the test chamber 2; the controller is respectively and electrically connected with the temperature measuring piece 6 and the heating component 7. Specifically, the needling member 5 may be a stainless steel needle, the length of which may penetrate through the battery 3 to be tested, the temperature measuring member 6 may be a thermocouple or other temperature sensor, the thermocouple is stuck to the surface of the battery 3 to be tested by a high-temperature adhesive tape in the testing process, a via hole for a wire passing through the thermocouple is provided on the test box 1, and the test box 1 is fixed by a bracket provided below the test box.

The needling test is carried out by moving the needling member 5 towards the battery 3 to be tested, short circuit occurs in the battery in the needling test process, a large amount of heat is generated, the temperature measuring member 6 measures the temperature of the battery and transmits the measured temperature to the controller, the controller controls the heating assembly 7 to work, the temperature in the test cavity 2 is heated and raised, the temperature rise of the battery 3 to be tested and the temperature rise of the test cavity 2 are synchronous, the heat insulation environment is constructed by the setting of the heating assembly 7, the inaccuracy of temperature monitoring caused by heat transfer is avoided, the heat generation quantity of the solid-state battery in short circuit can be accurately monitored, and the design and the safety performance of the battery can be accurately evaluated.

As shown in fig. 2 to 4, in the solid-state battery needling heat-generating testing device provided in this embodiment, a carrying table 8 is disposed in the testing cavity 2 and is used for carrying the battery 3 to be tested, and a clamping member 9 for fixing the battery 3 to be tested is disposed on the carrying table 8. In the testing process, the stability of the battery 3 to be tested is ensured, and the testing accuracy is improved, wherein the clamping piece 9 and the bearing table 8 are both provided with through holes for penetrating the needling piece 5.

The clamping piece 9 is made of stainless steel, is bent according to the sizes of different batteries, and is provided with a hollow for the penetration of the needling piece 5; screw holes are formed in two sides of the bearing table 8, connecting holes are formed in two sides of the clamping piece 9, the clamping piece 9 and the bearing table 8 are fixed through the connecting holes and the screw holes by bolts, multiple groups of clamping pieces 9 can be arranged, and stability is improved. The plummer 8 can divide into the three-layer, upper steel sheet, intermediate level aluminum plate and lower floor's steel sheet, can evenly distributed have multiunit first heating element 13 in the intermediate level, and aluminum plate's setting is convenient for thermal transfer, carries out heat transfer through aluminum plate to its upper and lower steel sheet, and it is more even to transfer heat, when directly placing first heating element 13 in the steel sheet, its temperature that is close to first heating element 13 and keeps away from first heating element 13 department is different, causes the temperature hysteresis that heat transfer leads to easily, influences the monitoring effect.

As shown in fig. 3 and 4, the solid-state battery needling heat-generating testing device provided in this embodiment has a plane 10 and an indent cambered surface 11 on the carrying platform 8, where the plane 10 is used for placing a square battery 3 to be tested, and the cambered surface 11 is used for placing a cylindrical battery 3 to be tested. The versatility is strong, and the arc surface 11 is generally arranged at the center of the bearing table 8, and is suitable for testing batteries without shapes.

As shown in fig. 1, in the solid-state battery needling heat generation testing device provided in this embodiment, the carrying platform 8 is connected to the first driving device 12, and the carrying platform 8 is driven to move by the first driving device 12. Through the drive to plummer 8 to adapt to the battery of equidimension, the commonality is strong, need not to set up more testing arrangement according to the difference of model, reduce cost. The first driving device 12 is arranged below the test box 1, the output end of the first driving device passes through the side wall of the test box 1 and stretches into the test cavity 2, and is connected with the bottom of the bearing table 8, and the first driving device 12 can be driven by a hydraulic cylinder, an air cylinder or an electric cylinder and the like.

As shown in fig. 1 and 2, the solid-state battery needling heat generation testing device provided in this embodiment includes a heating assembly 7 including a first heating element 13 and a second heating element 14, where the first heating element 13 is disposed inside the carrying table 8 and is used for heating the carrying table 8; the second heating element 14 is disposed on the test chamber 1 and is used for heating the temperature in the test chamber 2. The arrangement of the first heating element 13 and the second heating element 14 is used for constructing an adiabatic environment, avoiding inaccurate temperature monitoring due to heat transfer, and the first heating element 13 and the second heating element 14 may be resistance wires.

As shown in fig. 1 and 2, the solid-state battery needling heat-generating test device provided in this embodiment is characterized in that the test box 1 has an open structure at one side, a sealing cover 22 is disposed at the opening of the test box 1, the test box 1 includes an outer shell 15 and an inner shell 16, the inner shell 16 is disposed inside the outer shell 15, a heating cavity 17 is disposed between the inner shell 16 and the outer shell 15, a heat-insulating member is disposed in the heating cavity 17, and the second heating member 14 is disposed in the heating cavity 17, and the inner shell 16 is made of a heat-transferring material. The inner shell 16 may be aluminum and the insulating member may be insulating cotton.

The battery 3 to be tested is placed in the test cavity 2 from the opening, the test cavity 2 is of a sealing structure due to the arrangement of the sealing cover 22, leakage of harmful gas generated in the test process is avoided, the sealing cover 22 is connected with the test box 1 through the lock catch, the sealing ring is arranged between the sealing cover 22 and the test box 1, heat loss to the outside is avoided due to the arrangement of the heat preservation part, the inner shell 16 is made of a heat transfer material, heat can be transferred into the test cavity 2, heat is transferred through the inner shell 16, the temperature in the test cavity 2 is uniformly increased, and the built environment can be used for accurately measuring the generated heat of the battery.

As shown in fig. 1 and 2, in the solid-state battery needling heat generating test apparatus provided in this embodiment, the test box 1 has a cylindrical structure, the second heating member 14 is disposed around the inner casing 16, and the second heating member 14 has a spiral or ring structure. The provision of a cylindrical structure improves the uniformity of the temperature rise in the test cavity 2, and the provision of a spiral or annular structure for the second heating element 14 makes the heating temperature rise more uniform.

As shown in fig. 1 and 2, in the solid-state battery needling heat generating testing device provided in this embodiment, the needling member 5 is connected to the second driving device 21, and the needling member 5 is driven by the second driving device 21 to move toward the battery 3 to be tested. The needling test is automatically completed through the driving of the second driving device 21, manual operation is not needed, the danger is reduced, and the batteries 3 to be tested with different sizes can be moved for different distances, so that the universality is strong. The second driving device 21 is arranged above the test box 1, the output end of the second driving device is connected with the needling member 5, the needling member 5 penetrates through the side wall of the test box 1 and stretches into the test cavity 2, and the second driving device 21 can be driven by a hydraulic cylinder, an air cylinder or an electric cylinder and the like.

As shown in fig. 1, in the solid-state battery needling heat-generating testing device provided in this embodiment, the testing box 1 is provided with an exhaust hole 18 for exhausting the harmful gas in the testing cavity 2. After the test is finished, the harmful gas in the test cavity 2 is discharged through the exhaust hole 18, so that pollution caused by the fact that the harmful gas overflows into the environment when the battery 3 to be tested is taken out is avoided, and the exhaust hole 18 is used for being connected with exhaust equipment.

As shown in fig. 1, the solid-state battery needling heat-generating testing device provided in this embodiment further includes a fire-fighting assembly 19 and a camera assembly 20, where the fire-fighting assembly 19 is connected to the testing cavity 2 and is used for introducing fire-fighting gas into the testing cavity 2; a camera assembly 20 is arranged in the test cavity 2. The fire control subassembly 19 is arranged in letting in fire control gas to the test cavity 2, can realize putting out a fire fast, and the battery behavior in the testing process can be monitored to the subassembly 20 of making a video recording, and wherein, the camera in the subassembly 20 of making a video recording is explosion-proof camera.

The testing process comprises the following steps: during testing, the battery 3 to be tested is fixed on the bearing table 8 through the clamping piece 9, the temperature measuring piece 6 is fixed on the battery 3 to be tested, the bearing table 8 is moved to a proper position through the first driving device 12, the sealing cover 22 is closed, then the second driving device 21 is started, the needling piece 5 pierces the battery 3 to be tested at a set speed, a short circuit occurs in the battery to generate a large amount of heat, the battery temperature is raised, the temperature measuring piece 6 feeds back temperature data to the controller, the controller controls the heating component 7 to heat and raise the temperature, the short circuit phenomenon of the battery can be monitored through the camera shooting component 20, the fire fighting component 19 can spray carbon dioxide and the like when the battery is exploded, after testing is completed, the gas is discharged through the gas discharging hole 18, the needling piece 5 is separated from the battery 3 to be tested, the battery to be tested is taken out, an instrument is cleaned, and the test is completed.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. A solid-state battery needling heat generation testing apparatus, comprising:

the testing box (1) is internally provided with a testing cavity (2), the testing cavity (2) is of a closed structure, and a battery (3) to be tested is suitable for being placed in the testing cavity (2);

a needling assembly (4) having a needling member (5) extending into the test cavity (2), the needling member (5) being movable in the direction of the battery (3) to be tested;

the temperature measuring piece (6) is connected with the battery (3) to be tested and is used for detecting the temperature of the battery (3) to be tested;

a heating assembly (7) for heating the temperature inside the test cavity (2);

and the controller is respectively and electrically connected with the temperature measuring piece (6) and the heating component (7).

2. The solid-state battery needling heat generation testing device according to claim 1, wherein a bearing table (8) is arranged in the testing cavity (2) and is used for bearing the battery (3) to be tested, and a clamping piece (9) used for fixing the battery (3) to be tested is arranged on the bearing table (8).

3. The solid-state battery needling heat generation testing device according to claim 2, characterized in that the bearing table (8) is provided with a plane (10) and an inward concave cambered surface (11), the plane (10) is used for placing square batteries (3) to be tested, and the cambered surface (11) is used for placing cylindrical batteries (3) to be tested.

4. The solid-state battery needling heat generation test apparatus of claim 2 wherein the carrier table (8) is connected to a first drive means (12), the carrier table (8) being driven to move by the first drive means (12).

5. The solid-state battery needling heat generation test apparatus of claim 2 wherein the heating assembly (7) comprises:

the first heating piece (13) is arranged inside the bearing table (8) and is used for heating the bearing table (8);

and the second heating piece (14) is arranged on the test box (1) and is used for heating the temperature in the test cavity (2).

6. The solid-state battery needling heat generation test apparatus as claimed in claim 5, wherein the test case (1) has an open structure on one side, a sealing cover (22) is provided at an opening of the test case (1), and the test case (1) includes:

a housing (15);

the inner shell (16) is arranged inside the outer shell (15), a heating cavity (17) is formed between the inner shell (16) and the outer shell (15), a heat preservation piece is arranged in the heating cavity (17), the second heating piece (14) is arranged in the heating cavity (17), and the inner shell (16) is made of a heat transfer material.

7. The solid state battery needling heat generation test apparatus of claim 6 wherein the test box (1) is of cylindrical configuration, the second heating member (14) is disposed about the inner housing (16), the second heating member (14) being of helical or annular configuration.

8. The solid-state battery needling heat generation test apparatus of claim 1, wherein the needling member (5) is connected to a second driving means (21), and the needling member (5) is driven by the second driving means (21) to move toward the battery (3) to be tested.

9. The solid-state battery needling heat generation test apparatus of any of claims 1-8, wherein the test box (1) is provided with a vent hole (18) for venting harmful gases within the test cavity (2).

10. The solid state battery needling heat generation test apparatus of any of claims 1-8, further comprising:

the fire-fighting assembly (19) is connected with the test cavity (2) and is used for introducing fire-fighting gas into the test cavity (2);

the camera shooting assembly (20) is arranged in the test cavity (2).