High-voltage test fixture and high-voltage test equipment for solid-state battery

Abstract

The utility model relates to the technical field of solid-state batteries, in particular to a solid-state battery high-voltage test fixture and test device.The solid-state battery high-voltage test fixture comprises a spring, a pressure applying part, a bearing part and a supporting drive part, one end of the spring is fixed, and the other end of the spring is connected with the pressure applying part; and at least part of the pressure applying part is opposite to the bearing part along the first direction. And when the pressure applying part and the bearing part are in a contact state, the spring is in a natural extension state or a compression state. The bearing part extends in the first direction, the supporting driving part and the bearing part can be arranged side by side, and at least part of the supporting driving part can stretch out and retract in the first direction. According to the solid-state battery high-voltage test fixture and the test equipment provided by the invention, the energy consumption of the solid-state battery high-voltage test fixture in a solid-state battery pre-pressing process is saved, and the pressure applying upper limit of the solid-state battery high-voltage test fixture on the solid-state battery is improved.

Description

Technical Field

[0001] This application relates to the field of solid-state battery technology, and in particular to a high-voltage test fixture and test equipment for solid-state batteries. Background Technology

[0002] Solid-state batteries are a battery technology that uses a solid electrolyte instead of a traditional liquid or polymer electrolyte. Compared to traditional lithium-ion batteries, solid-state batteries have potential advantages in terms of safety, energy density, cycle life, and charging speed. Solid-state batteries have a wide range of applications, including electric vehicles, portable electronic devices, and energy storage systems.

[0003] The pre-pressing process is a process of continuously applying a predetermined pressure to a solid-state battery using a pressure clamp. This pre-pressing process is an important step in the manufacturing and testing of solid-state batteries. Its purpose is to apply constant pressure to the battery using a pressure clamp to improve and maintain the contact tightness between the solid electrolyte and electrode materials, thereby improving the overall performance of the battery and enhancing its performance and stability.

[0004] However, current pressure clamps typically include two types: active pressure clamps and passive pressure clamps. Active pressure clamps usually apply pressure directly to the solid-state battery using cylinders or hydraulic cylinders. This requires continuous power output to maintain a constant pressure output during the continuous pressure application process, resulting in high energy consumption. Passive pressure clamps, on the other hand, typically use a structure that involves bundling and pressurizing the solid-state battery, along with a gear bearing and torque wrench to tighten and pressurize it. However, due to the limitations of the gear bearing and torque wrench structure, this method has a relatively low pressure limit for solid-state batteries, making it difficult to meet the pressure requirements of some solid-state batteries. Utility Model Content

[0005] The purpose of this application is to provide a high-voltage test fixture and testing equipment for solid-state batteries, so as to solve to some extent the problems existing in the prior art. Active pressure fixtures require continuous power output to ensure constant pressure output, resulting in high energy consumption. Passive pressure fixtures usually use a structure of binding and pressurizing solid-state batteries, and use gear bearings and torque wrenches to tighten and pressurize solid-state batteries. However, due to the limitations of the structure of gear bearings and torque wrenches, the upper limit of pressure applied to solid-state batteries is relatively low, which makes it difficult to meet the pressure requirements of some solid-state batteries.

[0006] According to a first aspect of this application, a high-voltage test fixture for a solid-state battery is provided, comprising a spring, a pressure-applying part, a support part, and a support drive part. One end of the spring is fixed, and the other end of the spring is connected to the pressure-applying part. At least a portion of the pressure-applying part and the support part are disposed opposite to each other along a first direction.

[0007] The support portion is used to place the battery to be tested. When the pressure application portion and the support portion are in contact with each other, the spring is in a naturally extended state or in a compressed state.

[0008] The supporting portion extends along the first direction, the supporting driving portion can be arranged side by side with the supporting portion, and at least a portion of the supporting driving portion can extend and retract along the first direction;

[0009] When the support drive part is in the shortened state, the dimension of the support drive part in the first direction is less than or equal to the dimension of the support part in the first direction;

[0010] When the support drive is in an extended state, the support drive can support the pressure application part away from the support part.

[0011] Preferably, the device further includes a housing, which has a placement space extending along the first direction, wherein the spring and the support portion are both disposed in the placement space and are respectively fixedly connected to the housing.

[0012] Preferably, the housing includes a top wall, a bottom wall, and two connecting walls. The top wall and the bottom wall are arranged opposite each other along the first direction, and the two connecting walls are spaced apart along the second direction. The two ends of the connecting walls in the first direction are respectively connected to the top wall and the bottom wall, and the second direction intersects the first direction.

[0013] Preferably, it further includes a pressure sensor disposed between the spring and the housing.

[0014] Preferably, it further includes a guide portion extending along the first direction, the guide portion being disposed on the side of the pressure-applying portion opposite to the support portion, and being fixedly connected to the pressure-applying portion;

[0015] The side wall of the housing where the spring is located is provided with a guide hole that penetrates the side wall, and the guide portion penetrates the guide hole.

[0016] Preferably, the support drive unit is detachably connected to the housing.

[0017] Preferably, the supporting part is capable of moving up and down along the first direction.

[0018] Preferably, the spring is a nitrogen spring;

[0019] Alternatively, the spring may be a pressure disc spring.

[0020] Preferably, the pressure-applying part includes a pressure-applying block and a pressure-applying plate connected to each other, the pressure-applying block and the supporting part are arranged opposite to each other, and the pressure-applying part is connected to the spring via the pressure-applying plate;

[0021] The shape of the pressure plate is adapted to the placement space so that the pressure plate can be slidably connected along the housing.

[0022] According to a second aspect of this application, a testing device is provided, including the solid-state battery high-voltage test fixture described in any of the above technical solutions, and thus possesses all the beneficial technical effects of the solid-state battery high-voltage test fixture, which will not be repeated here.

[0023] Compared with the prior art, the beneficial effects of this application are as follows:

[0024] The solid-state battery high-voltage test fixture provided in this application, on the one hand, provides continuous power for the pressure application part through a compression spring, which not only effectively avoids the continuous power output of existing active pressure fixtures and saves energy consumption in the solid-state battery pre-pressurization process, but also avoids the limitations of current passive pressure fixtures that are restricted by the structure of gear bearings and torque wrenches, thus increasing the upper limit of pressure that the solid-state battery high-voltage test fixture can apply to the solid-state battery. On the other hand, through a support drive part that can be arranged side by side with the support part extending in the first direction, the solid-state battery high-voltage test fixture can load and unload the battery under test. That is, by extending the support drive part, the support drive part can support the pressure application part away from the support part, so as to place the battery under test on the support part. After the battery under test is placed, the support drive part can be shortened to be less than or equal to the size of the support part in the first direction, effectively preventing the support drive part from hindering the solid-state battery high-voltage test fixture from applying pressure to the battery under test.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a front view of the solid-state battery high-voltage test fixture provided in an embodiment of this application.

[0028] Figure 2This is a front view of the solid-state battery high-voltage test fixture provided in the embodiment of this application, showing the battery under test being held in the clamping state.

[0029] Figure 3 This is an isometric structural diagram of another solid-state battery high-voltage test fixture provided in an embodiment of this application.

[0030] Figure label:

[0031] 1-Spring; 2-Pressure application part; 21-Pressure application block; 22-Pressure application plate; 23-Guide part; 3-Support part; 4-Support drive part; 5-House; 51-Top wall; 52-Connecting wall; 53-Bottom wall; 6-Pressure sensor; 7-Battery under test.

[0032] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0033] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0034] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0035] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] The following reference Figures 1 to 3 This application describes a solid-state battery high-voltage test fixture and test equipment according to some embodiments.

[0039] See Figures 1 to 3 As shown, an embodiment of the first aspect of this application provides a high-voltage test fixture for a solid-state battery, comprising a spring 1, a pressure-applying part 2, a support part 3, and a support drive part 4. One end of the spring 1 is fixed, and the other end of the spring 1 is connected to the pressure-applying part 2. At least a portion of the pressure-applying part 2 and the support part 3 are arranged opposite each other along a first direction F1. The support part 3 is used to place the battery 7 to be tested. When the pressure-applying part 2 and the support part 3 are in contact with each other, the spring 1 is in a naturally extended state or a compressed state. The support part 3 extends along the first direction F1, and the support drive part 4 can be arranged side by side with the support part 3, and at least a portion of the support drive part 4 can extend and retract along the first direction F1. When the support drive part 4 is in a retracted state, the dimension of the support drive part 4 in the first direction F1 is less than or equal to the dimension of the support part 3 in the first direction F1; when the support drive part 4 is in an extended state, the support drive part 4 can support the pressure part 2 away from the support part 3.

[0040] According to the above-mentioned technical features, the solid-state battery high-voltage test fixture provides continuous power for the pressure application part 2 through the compression spring 1. This not only effectively avoids the continuous power output of existing active pressure fixtures and saves energy consumption in the solid-state battery pre-pressurization process, but also avoids the limitations of the current passive pressure fixtures which are restricted by the structure of gear bearings and torque wrenches, thus increasing the upper limit of pressure that the solid-state battery high-voltage test fixture can apply to the solid-state battery. On the other hand, the solid-state battery high-voltage test fixture can load and unload the battery under test 7 by means of a support drive part that can be arranged side by side with the support part 3 that extends along the first direction F1. That is, by extending the support drive part 4, the support drive part 4 can support the pressure application part 2 away from the support part 3, so that the battery under test 7 can be placed on the support part. After the battery under test 7 is placed, the support drive part 4 can be shortened to be less than or equal to the size of the support part 3 in the first direction F1, thus effectively preventing the support drive part 4 from hindering the solid-state battery high-voltage test fixture from applying pressure to the battery under test 7.

[0041] like Figures 1 to 3 As shown in the figure, F1 can be an example of the first direction F1 described above, and F2 can be an example of the second direction F2 described below, wherein the first direction F1 may intersect with the second direction F2. Preferably, the second direction F2 may be perpendicular to the first direction F1 to ensure the pressure stability of the solid-state battery high-voltage test fixture. For ease of description, the direction perpendicular to both the first direction F1 and the second direction F2 is defined as the third direction F3. Preferably, when the solid-state battery high-voltage test fixture is in use, the first direction F1 may be parallel to the direction of gravity to utilize the weight of the pressure application part 2 to apply pressure to the battery 7 under test, further saving the energy consumption of the solid-state battery high-voltage test fixture.

[0042] Preferably, such as Figures 1 to 3 As shown, the solid-state battery high-voltage test fixture may also include a housing 5, which may be provided with a placement space extending along the first direction F1. The spring 1 and the support portion 3 are both disposed in the placement space and are respectively fixedly connected to the housing 5.

[0043] Optionally, such as Figure 3 As shown, the aforementioned placement space is open at at least one end of the housing 5 in the third direction F3 to facilitate the installation and removal of the battery 7 under test.

[0044] Preferably, such as Figures 1 to 3 As shown, the housing 5 may include a top wall 51, a bottom wall 53 and two connecting walls 52. The top wall 51 and the bottom wall 53 are arranged opposite each other along a first direction F1, and the two connecting walls 52 are spaced apart along a second direction F2. The two ends of the connecting walls 52 in the first direction F1 are respectively connected to the top wall 51 and the bottom wall 53 to enclose and form the aforementioned placement space.

[0045] Optionally, such as Figures 1 to 3 As shown, the top wall 51, bottom wall 53 and two connecting walls 52 can be integrally formed to ensure the tensile strength of the shell 5.

[0046] Preferably, the tensile force that the shell 5 can withstand is greater than or equal to 150T, so as to ensure the tensile strength of the shell 5.

[0047] Preferably, such as Figures 1 to 3 As shown, the pressure-applying part 2 may include a pressure-applying block 21 and a pressure-applying plate 22 connected to each other. The pressure-applying block 21 and the supporting part 3 are arranged opposite each other, and the pressure-applying part 2 is connected to the spring 1 via the pressure-applying plate 22. The shape of the pressure-applying plate 22 can be adapted to the above-mentioned placement space so that the pressure-applying plate 22 can slide along the housing 5, thereby ensuring the stability of the pressure applied by the pressure-applying part 2.

[0048] Further, such as Figure 1 and Figure 2As shown, the aforementioned solid-state battery high-voltage test fixture may further include a guide portion 23 extending along the first direction F1. The guide portion 23 is disposed on the side of the pressure-applying portion 2 opposite to the support portion 3 and is fixedly connected to the pressure-applying portion 2. A guide hole penetrating the side wall of the housing 5 where the spring 1 is located is provided, and the guide portion 23 penetrates the guide hole. Thus, through the sliding connection between the guide portion 23 and the guide hole, the movement of the pressure-applying portion 2 along the first direction F1 can be effectively guided, thereby further improving the pressure application stability and smoothness of the pressure-applying portion 2.

[0049] Preferably, such as Figure 1 and Figure 2 As shown, the solid-state battery high-voltage test fixture may also include a pressure sensor 6, which may be disposed between the spring 1 and the housing 5 to enable quantitative control of the pressure applied by the solid-state battery high-voltage test fixture to the battery 7 under test.

[0050] Preferably, the support part 3 can be raised and lowered along the first direction F1. On the one hand, this facilitates the adjustment of the height of the support part 3 according to the position of the pressure part 2 and the size of the battery under test 7, thereby improving the adaptability of the solid-state battery high-voltage test fixture. On the other hand, it facilitates the loading and unloading of the battery under test 7.

[0051] Alternatively, the support 3 can be a lifting platform.

[0052] Preferably, the support drive unit 4 can be detachably connected to the housing 5 so that the support drive unit 4 can be removed during the test. This not only avoids the support drive unit from interfering with the test of the battery 7, but also avoids the support drive unit 4 from being occupied, so that the support drive unit 4 can support multiple solid-state battery high-voltage test fixtures for testing at the same time.

[0053] Optionally, the aforementioned support drive unit 4 can be other linear drive devices such as jacks, cylinders, and hydraulic cylinders.

[0054] Preferably, such as Figures 1 to 3 As shown, there can be multiple support drive units 4, and multiple support drive units 4 can be evenly arranged on both sides of the support unit 3 to ensure the smooth lifting of the pressure plate 22.

[0055] Optionally, the spring 1 described above can be a nitrogen spring.

[0056] Alternatively, the spring 1 described above can also be a pressure disc spring.

[0057] Preferably, such as Figure 3 As shown, there can be multiple springs 1, and multiple springs 1 can be evenly distributed on the upper surface of the pressure plate 22 to ensure the uniformity of the force applied to the pressure part 2.

[0058] Based on the features described above, Figures 1 to 3 The following description uses the solid-state battery high-voltage test fixture as an example. The working principle of the solid-state battery high-voltage test fixture will be described in detail below.

[0059] Install the battery under test 7: Extend the drive support 4 until the pressure value detected by the pressure sensor 6 reaches the test pressure value, place the battery under test 7 on the support 3, adjust the height of the support 3 so that the upper surface of the battery under test 7 contacts the pressure application part 2, shorten the drive support 4, record the pressure start time, and remove the drive support 4.

[0060] Remove the battery under test 7, set the support drive part 4 and the support part 3 side by side, drive the support drive part 4 to extend until it abuts against the pressure plate 22 of the pressure part 2, drive the support part 3 to descend so that the battery under test 7 separates from the pressure block 21, remove the battery under test 7, drive the support drive part 4 to shorten until the support part 3 abuts against the pressure block 21, and remove the support drive part 4.

[0061] The second aspect of this application also provides a testing device, including the solid-state battery high-voltage test fixture described in any of the above embodiments, and thus possesses all the beneficial technical effects of the solid-state battery high-voltage test fixture, which will not be repeated here.

[0062] Preferably, the testing device may further include a display unit, and the pressure sensor 6 may be communicatively connected to the display unit to display the pressure value detected by the pressure sensor.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-voltage test fixture for solid-state batteries, characterized in that, It includes a spring, a pressure-applying part, a support part, and a support drive part. One end of the spring is fixed, and the other end of the spring is connected to the pressure-applying part. At least a portion of the pressure-applying part and the support part are arranged opposite each other along a first direction. The support portion is used to place the battery to be tested. When the pressure application portion and the support portion are in contact with each other, the spring is in a naturally extended state or in a compressed state. The supporting portion extends along the first direction, the supporting driving portion can be arranged side by side with the supporting portion, and at least a portion of the supporting driving portion can extend and retract along the first direction; When the support drive part is in the shortened state, the dimension of the support drive part in the first direction is less than or equal to the dimension of the support part in the first direction; When the support drive is in an extended state, the support drive can support the pressure application part away from the support part.

2. The solid-state battery high-voltage test fixture according to claim 1, characterized in that, It also includes a housing, which has a placement space extending along the first direction, and the spring and the support portion are both disposed in the placement space and are respectively fixedly connected to the housing.

3. The solid-state battery high-voltage test fixture according to claim 2, characterized in that, The housing includes a top wall, a bottom wall, and two connecting walls. The top wall and the bottom wall are arranged opposite each other along a first direction, and the two connecting walls are spaced apart along a second direction. The two ends of the connecting walls in the first direction are respectively connected to the top wall and the bottom wall. The second direction intersects the first direction.

4. The solid-state battery high-voltage test fixture according to claim 2, characterized in that, It also includes a pressure sensor disposed between the spring and the housing.

5. The solid-state battery high-voltage test fixture according to claim 2, characterized in that, It also includes a guide portion extending along the first direction, the guide portion being disposed on the side of the pressure-applying portion opposite to the support portion, and being fixedly connected to the pressure-applying portion; The side wall of the housing where the spring is located is provided with a guide hole that penetrates the side wall, and the guide portion penetrates the guide hole.

6. The solid-state battery high-voltage test fixture according to claim 2, characterized in that, The support drive unit is detachably connected to the housing.

7. The solid-state battery high-voltage test fixture according to claim 1, characterized in that, The supporting part can move up and down along the first direction.

8. The solid-state battery high-voltage test fixture according to any one of claims 1 to 7, characterized in that, The spring is a nitrogen spring; Alternatively, the spring may be a pressure disc spring.

9. The solid-state battery high-voltage test fixture according to claim 2, characterized in that, The pressure-applying part includes a pressure-applying block and a pressure-applying plate connected to each other. The pressure-applying block and the supporting part are arranged opposite each other. The pressure-applying part is connected to the spring via the pressure-applying plate. The shape of the pressure plate is adapted to the placement space so that the pressure plate can be slidably connected along the housing.

10. A testing device, characterized in that, The solid-state battery high-voltage test fixture includes any one of claims 1 to 9.

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