Solid-state battery testing device
By using multiple heating rings and housing structures with different power in the solid-state battery testing device, the required temperature can be directly achieved, solving the problem of inaccurate testing caused by battery temperature changes, simplifying device design and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUPERIONIC SOLID ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-03-14
- Publication Date
- 2026-04-21
AI Technical Summary
Existing solid-state battery testing equipment suffers from large fluctuations in cycle performance due to temperature changes when testing at different temperatures, resulting in inaccurate test results. Furthermore, the setup of temperature sensors and temperature control devices is complex and costly.
By employing multiple heating rings and housing structures with different power ratings, the desired temperature can be directly achieved by selecting heating rings with different power ratings, eliminating the need for temperature sensors and temperature adjustment structures, thus simplifying device design and reducing costs.
Temperature stability was achieved during testing at different temperatures, simplifying the device structure, reducing costs, and improving the accuracy of test results.
Smart Images
Figure CN224152618U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solid-state battery technology, and more specifically to a solid-state battery testing device. Background Technology
[0002] When testing solid-state batteries, the pressed batteries need to be tested at different temperatures. The mold relies on high-temperature or low-temperature ovens for different temperature tests during the testing phase. During testing, the pressed batteries and the mold battery sleeve are placed in the oven to reach the preset temperature and then taken out for testing. However, the battery temperature will change after being taken out, resulting in large fluctuations in battery cycle performance and inaccurate test results.
[0003] To address the aforementioned issues, existing technologies typically employ heating elements in the testing apparatus to heat the battery, along with temperature sensors and temperature control devices to regulate the heating temperature of the heating elements. This approach is complex and costly. Utility Model Content
[0004] The purpose of this invention is to overcome the limitations of existing technologies that require temperature sensors and temperature control devices to regulate the heating temperature of the heating element, resulting in complex structures and high costs.
[0005] To achieve the above objectives, this utility model provides a solid-state battery testing device, comprising:
[0006] The pressing unit includes an upper pressing head and a lower pressing head, forming a pressing space between the upper and lower pressing heads to accommodate and press a solid-state battery; and a heating unit includes multiple heating rings with different power, leads for connecting the heating rings, and a housing, the housing surrounding the pressing space and having an opening that allows the leads to pass through, the test apparatus being configured to selectively set one of the heating rings to surround the pressing space and be located in the housing to heat the solid-state battery in the pressing space.
[0007] In some embodiments, the pressing unit further includes an insulating sleeve, with the ends of the upper pressing head and the lower pressing head respectively passing through the insulating sleeve in the vertical direction, and the gap formed by the upper pressing head, the lower pressing head and the insulating sleeve forming a pressing space.
[0008] In some embodiments, a heating ring surrounds the insulating sleeve, and a space for accommodating the heating ring is formed between the housing and the insulating sleeve.
[0009] In some embodiments, the housing includes an upper housing and a lower housing, which are detachably connected.
[0010] In some embodiments, multiple heating rings with different power ratings are of the same size and made of materials with different resistance values.
[0011] In some embodiments, the inner side of the wall of the lower housing is recessed inward to form an annular stepped surface, the heating ring is located between the stepped surface and the insulating sleeve, the lower end of the upper housing extends into the gap between the lower housing and the insulating sleeve and abuts against the upper part of the heating ring, the contact surfaces of the upper housing and the lower housing are provided with mutually mating threads, and an opening is provided on the lower housing at a position corresponding to the lead wire, the opening extending vertically upward along the wall of the lower housing to the upper edge of the lower housing.
[0012] In some embodiments, a thermal insulation component is installed on the housing.
[0013] In some embodiments, the pressing space is used to place solid-state battery materials, and the upper and lower pressing heads can approach each other to press the solid-state battery materials and form a solid-state battery.
[0014] In some embodiments, the upper and lower pressure heads are provided with horizontal support portions at their ends away from the pressing space, and fasteners are provided on the support portions. The fasteners can adjust the distance between the upper and lower pressure heads to maintain pressure on the solid-state battery.
[0015] In some embodiments, the upper pressure head and the lower pressure head are conductive and are respectively provided with test lead sockets for electrical connection to an external power supply.
[0016] In some embodiments, the fastener includes a fastening bolt and a fastening nut, and the support portions of the upper and lower pressure heads are respectively provided with through holes for the fastening bolt to pass through, and the spacing is adjusted by the fastening nut.
[0017] In some embodiments, the upper and lower pressure heads have grooves formed by circumferential inward recesses on their contact surfaces with the insulating sleeve, and a sealing ring is provided in the grooves.
[0018] With the above technical solution, heating rings of different power can be selected according to the test temperature requirements. When the required test temperature changes, the heating ring with the corresponding power for the required temperature can be directly replaced. There is no need to set up a temperature sensor and a temperature adjustment structure. The structure is simple and the cost is low. Attached Figure Description
[0019] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;
[0020] Figure 2 This is a side view of the upper housing according to an embodiment of the present utility model;
[0021] Figure 3 This is a side view of the lower housing according to an embodiment of the present invention;
[0022] Figure 4 This is a top view of the heating ring according to an embodiment of the present invention.
[0023] Explanation of reference numerals in the attached figures
[0024] 1. Solid-state batteries;
[0025] 2. Heating unit; 21. Heating ring; 22. Housing; 221. Upper housing; 222. Lower housing; 23. Lead wire;
[0026] 3. Pressing unit; 31. Upper press head; 32. Lower press head; 33. Insulating sleeve; 34. Sealing ring; 35. Test lead socket; 36. Fastening bolt; 37. Fastening nut; 38. Insulating gasket. Detailed Implementation
[0027] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," "right," "inner," and "outer" are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0028] To address the problems of complex structures and high costs associated with existing technologies that rely on temperature sensors and control devices to regulate the heating temperature of heating elements, this invention provides a solid-state battery testing device, such as... Figure 1 As shown, the solid-state battery testing device includes: a pressing unit 3, which includes an upper pressing head 31 and a lower pressing head 32 arranged at different heights, with a pressing space formed between the upper pressing head 31 and the lower pressing head 32 to accommodate and press the solid-state battery 1; and a heating unit 2, which includes multiple heating rings 21 with different power, leads 23, and a housing 22, as shown. Figure 4As shown, the heating ring 21 is made of a ring-shaped metal sheet. A lead 23 is connected to the heating ring 21, which is used to electrically connect to an external power source, energizing the heating ring 21 and providing a specific temperature environment for the testing device. The heating ring 21 and the housing 22 are sequentially arranged around the pressing space. The housing 22 is used to fix the heating ring 21 outside the pressing space. The housing 22 also has an opening allowing the lead 23 to pass through, enabling the lead 23 to pass through the wall of the housing 22 and connect to the external power source. The testing device is configured to selectively arrange one of the heating rings 21 around the pressing space and located within the housing 22 to heat the solid-state battery 1 within the pressing space. Since the heating ring 21 can reach a stable temperature within a certain time after being energized, and the stable temperature varies depending on the power of the heating ring 21, different power heating rings 21 can be selected according to the required test temperature. A stable temperature can be obtained after heating for a certain time, eliminating the need for a temperature sensor and temperature adjustment structure, thus ensuring that the required test temperature is reached. With the above technical solution, heating rings 21 with different power can be selected according to the test temperature requirements. When the required test temperature changes, the heating ring 21 with the corresponding power for the required temperature can be directly replaced. There is no need to set up a temperature sensor and temperature adjustment structure. The structure is simple and the cost is low.
[0029] In some embodiments, the pressing unit 3 further includes an insulating sleeve 33, the ends of the upper pressing head 31 and the lower pressing head 32 are respectively inserted into the insulating sleeve 33 in the vertical direction, and the gap formed by the upper pressing head 31, the lower pressing head 32 and the insulating sleeve 33 forms a pressing space. The insulating sleeve 33, the upper pressing head 31 and the lower pressing head 32 are used to define the shape of the solid battery 1 when pressing the solid battery material into the solid battery 1.
[0030] In some embodiments, such as Figure 1 As shown, the heating ring 21 surrounds the insulating sleeve 33, and the heating ring 21 transfers heat to the solid-state battery 1 through the insulating sleeve 33. The insulating sleeve 33 is made of a thermally conductive insulating material, such as polyetheretherketone (PEEK) or polytetrafluoroethylene (PTFE). A space is formed between the housing 22 and the insulating sleeve 33 to accommodate the heating ring 21. The housing 22 surrounds the insulating sleeve 33 and extends to surround the upper pressure head 31 and the lower pressure head 32, facilitating the support and fixation of the housing 22. It can be understood that the heating ring 21 surrounds the insulating sleeve 33 at a position corresponding to the pressing space, or the heating ring 21 can be entirely surrounded by the insulating sleeve 33; the housing 22 can also be configured to surround the insulating sleeve 33 without extending to the upper pressure head 31 and the lower pressure head 32, as long as the heating ring 21 can be fixed outside the pressing space.
[0031] In some embodiments, the housing 22 includes an upper housing 221 and a lower housing 222, which are detachably connected to each other, facilitating the replacement of heating rings 21 with different power ratings. Alternatively, the housing 22 can be configured to be split vertically, i.e., the housing 22 can be configured as two detachably connected semicircular rings, facilitating the replacement of heating rings 21 with different power ratings.
[0032] In some embodiments, multiple heating rings 21 with different power ratings are of the same size and made of materials with different resistance values, thereby fixing the size and position of the space between the housing 22 and the insulating sleeve 33 that accommodates the heating rings 21. Alternatively, heating rings 21 with different power ratings can be made of the same material but with different sizes, and the space between the housing 22 and the insulating sleeve 33 that accommodates the heating rings 21 can be made adjustable.
[0033] In some embodiments, such as Figure 1-3 As shown, the inner side of the lower housing 222 is recessed inward to form an annular stepped surface. The heating ring 21 is located between the stepped surface and the insulating sleeve 33. The lower end of the upper housing 221 extends into the gap between the lower housing 222 and the insulating sleeve 33 and abuts against the top of the heating ring 21. The contact surfaces of the upper housing 221 and the lower housing 222 are provided with mating threads. An opening is provided on the lower housing 222 at a position corresponding to the lead wire 23, such as... Figure 3 As shown, the opening extends vertically upwards along the wall of the lower housing 222 to its upper edge. The threaded connection ensures that the housing 22 maintains its shape and does not deform during pressure holding. Alternatively, the upper housing 221 and lower housing 222 can be positioned at different heights of the housing 22 and connected together by snap-fit. The inner sides of the walls of the upper housing 221 and lower housing 222 are recessed inwards to form a space for accommodating the heating ring 21. The heating ring 21 is placed in the recess, and the lead wire 23 passes through the gap at the connection between the upper housing 221 and lower housing 222, facilitating the replacement of heating rings 21 with different power ratings.
[0034] In some embodiments, to achieve better thermal insulation, a thermal insulation component is installed on the housing 22. The thermal insulation component can be a thermal insulation material layer, such as a boron carbide coating on the housing 22. In the previous embodiment, although the opening on the lower housing 222 is relatively long, this opening is blocked by the upper housing 221, so the housing 22 as a whole can still maintain a good thermal insulation effect.
[0035] In some embodiments, the pressing space is used to place solid-state battery raw materials. A certain pressure is applied using a tablet press to bring the upper pressing head 31 and the lower pressing head 32 close to each other, thereby pressing the solid-state battery raw materials into a solid-state battery 1. The solid-state battery raw materials mainly include positive electrode active material powder (or electrode sheet), negative electrode active material powder (or electrode sheet), and electrolyte powder, and may also include other auxiliary materials such as conductive agents, binders, etc.
[0036] In some embodiments, such as Figure 1 As shown, the upper pressure head 31 and the lower pressure head 32 have horizontal support sections at their ends away from the pressing space. The vertical ends of the upper pressure head 31 and the lower pressure head 32 are connected to the center of the support section. During pressing, the tablet press acts on the support section to bring the upper pressure head 31 and the lower pressure head 32 closer together, pressing the solid-state battery material into a solid-state battery 1. The support section is also equipped with fasteners, which can adjust and fix the distance between the upper pressure head 31 and the lower pressure head 32, and maintain pressure on the solid-state battery 1 after pressing.
[0037] In some embodiments, such as Figure 1 As shown, the fasteners include a fastening bolt 36 and a fastening nut 37. The support portions of the upper pressure head 31 and the lower pressure head 32 are respectively provided with through holes through which the fastening bolt 36 passes. The distance between the upper pressure head 31 and the lower pressure head 32 is adjusted by using the fastening nut 37. The tightness of the fastening nut 37 can be adjusted using a wrench to maintain the pressure of the solid-state battery 1. Alternatively, the fastening nut 37 can be omitted, and threads adapted to the fastening bolt 36 can be provided in the through holes of the upper pressure head 31 or the lower pressure head 32 to adjust and fix the distance between them.
[0038] In some embodiments, the upper pressure head 31 and the lower pressure head 32 are conductive and are each provided with a test lead socket 35 for electrical connection to an external power supply. After pressing, the solid-state battery 1 can be tested by directly energizing the upper pressure head 31 and the lower pressure head 32.
[0039] It should be noted that if the fastening bolt 36 and the fastening nut 37 are conductive, an insulating gasket 38 needs to be provided between the contact surfaces of the fastening bolt 36 and the fastening nut 37 and the upper pressure head 31 and / or the lower pressure head 32. Figure 1 An embodiment is shown in which an insulating gasket 38 is provided between the contact surfaces of the fastening bolt 36 and the fastening nut 37 and the upper pressure head 31.
[0040] In some embodiments, the upper pressure head 31 and the lower pressure head 32 are recessed inward along the circumferential direction on the contact surface with the insulating sleeve 33, and a sealing ring 34 is provided in the groove to further improve the sealing performance. Vacuum sealing grease can also be applied to the sealing ring 34.
[0041] The following details the operation of one embodiment of the solid-state battery testing device: First, the solid-state battery is assembled in a glove box with a water and oxygen content of less than 0.1 ppm. The solid-state battery 1 is pressed using the pressing unit 3. The components of the heating unit 2 are removed, and the end of the lower pressing head 32 is inserted into the insulating sleeve 33. A certain amount of electrolyte powder is placed in the sleeve and spread out using the upper pressing head 31. Then, a tablet press is used to apply pressure to the support to form an electrolyte sheet. After removing the upper pressing head 31, a certain amount of positive electrode active material powder (or electrode sheet) is placed on top of the electrolyte sheet. After spreading out using the upper pressing head 31, the tablet press is used to press the electrolyte sheet. Then, the entire mold is inverted, the lower pressing head 32 is removed, and a certain amount of negative electrode active material powder (or electrode sheet) is placed on top of the electrolyte sheet. After spreading out using the lower pressing head 32, the tablet press is used to press the electrolyte sheet to form the solid-state battery 1. Next, install heating unit 2. Remove the lower pressure head 32, wrap the lower housing 222 around the insulating sleeve 33, and reinstall the lower pressure head 32. Then, remove the upper pressure head 31. Place the heating ring 21, which requires the power for this test, into the gap between the lower housing 222 and the insulating sleeve 33. Insert the lead wire 23 connected to the heating ring 21 into the corresponding opening on the lower housing 222. Insert the lower end of the upper housing 221 into the gap between the lower housing 222 and the insulating sleeve 33. Rotate the upper housing 221 by the thread until it abuts against the heating ring 21. Then, install the upper pressure head 31 to complete the installation of heating unit 2. Finally, install the fastening bolts 36 and fastening nuts 37 into the through holes of the upper pressure head 31 and the support of the lower pressure head 32. Use a wrench to adjust the tightness of the fastening nuts 37 to maintain pressure, thus completing the assembly and allowing testing. After the test, disassemble the entire solid-state battery testing device, repress the solid-state battery 1 according to the above steps, and replace the heating ring 21 required for the next test.
[0042] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.
Claims
1. A solid state battery testing device, characterized by, include: A pressing unit (3) comprising an upper pressing head (31) and a lower pressing head (32), wherein a pressing space is formed between the upper pressing head (31) and the lower pressing head (32) to accommodate and press the solid-state battery (1); and, A heating unit (2) includes multiple heating rings (21) with different power, leads (23) for connecting the heating rings (21) and a housing (22), the housing (22) surrounding the compression space and having an opening that allows the leads (23) to pass through, the test device being configured to selectively set one of the heating rings (21) to surround the compression space and be located in the housing (22) to heat the solid-state battery (1) in the compression space.
2. The solid state battery testing device of claim 1, wherein, The pressing unit (3) further includes an insulating sleeve (33), the ends of the upper pressing head (31) and the lower pressing head (32) are respectively inserted into the insulating sleeve (33) in the vertical direction, and the gap formed by the upper pressing head (31), the lower pressing head (32) and the insulating sleeve (33) forms the pressing space.
3. The solid-state battery testing device of claim 2, wherein, The heating ring (21) surrounds the insulating sleeve (33), and a space is formed between the housing (22) and the insulating sleeve (33) to accommodate the heating ring (21).
4. The solid state battery testing device of claim 3, wherein, The housing (22) includes an upper housing (221) and a lower housing (222), wherein the upper housing (221) and the lower housing (222) are detachably connected; and / or, The multiple heating rings (21) with different power ratings are the same size and made of materials with different resistance values.
5. The solid state battery testing device of claim 4, wherein, The inner side of the wall of the lower housing (222) is recessed inward to form an annular stepped surface. The heating ring (21) is located between the stepped surface and the insulating sleeve (33). The lower end of the upper housing (221) extends into the gap between the lower housing (222) and the insulating sleeve (33) and abuts against the upper part of the heating ring (21). The contact surfaces of the upper housing (221) and the lower housing (222) are provided with mutually mating threads. An opening is provided on the lower housing (222) at a position corresponding to the lead wire (23). The opening extends vertically upward along the wall of the lower housing (222) to the upper edge of the lower housing (222).
6. The solid-state battery testing device of claim 1, wherein, The housing (22) is equipped with heat-insulating components.
7. The solid-state battery testing device of claim 2, wherein, The pressing space is used to place solid battery raw materials, and the upper pressing head (31) and the lower pressing head (32) can approach each other to press the solid battery raw materials and form the solid battery (1).
8. The solid state battery testing device of claim 7, wherein, The upper pressure head (31) and the lower pressure head (32) are provided with horizontal support portions at their ends away from the pressing space. Fasteners are provided on these support portions, and the fasteners can adjust the distance between the upper pressure head (31) and the lower pressure head (32) to maintain pressure on the solid-state battery (1); and / or, The upper pressure head (31) and the lower pressure head (32) are conductive and are respectively provided with test lead sockets (35) for electrical connection to an external power supply.
9. The solid state battery testing device of claim 8, wherein, The fasteners include fastening bolts (36) and fastening nuts (37). The support portions of the upper pressure head (31) and the lower pressure head (32) are respectively provided with through holes for the fastening bolts (36) to pass through, and the spacing is adjusted by the fastening nuts (37).
10. The solid-state battery testing device of claim 2, wherein, The upper pressure head (31) and the lower pressure head (32) have grooves formed inwardly along the circumferential direction on the contact surface with the insulating sleeve (33), and a sealing ring (34) is provided in the groove.