All-solid-state battery detection device and detection method thereof

Abstract

The invention discloses an all-solid-state battery detection device and a detection method thereof, and belongs to the technical field of capacitance testing, and the all-solid-state battery detection method comprises the steps: S100, in the charging process of an all-solid-state battery, obtaining first height data H1 of a movable hold-down clamp relative to a base according to charging pressure data F1; the laser unit measures first actual distance data L1 between the laser unit and the movable pressing tool; evaluating the charging state of the all-solid-state battery according to the first height data H1 and the first actual distance data L1; in the discharging process of the all-solid-state battery, according to the discharging pressure data F2, second height data H2 of the movable pressing tool relative to the base are obtained; the laser unit measures second actual distance data L2 between the laser unit and the movable pressing tool; and evaluating the discharge state of the all-solid-state battery according to the second height data H2 and the second actual distance data L2. According to the invention, the safety and stability of all-solid-state battery detection can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of all-solid-state batteries, and specifically relates to an all-solid-state battery detection device and a detection method thereof. Background Art

[0002] like Figure 1 As shown, an all-solid-state battery is an advanced battery technology consisting of a positive electrode layer 101, a solid electrolyte layer 102, and a negative electrode layer 103. Compared to traditional liquid electrolyte batteries, it has higher safety and energy density. During use, all-solid-state batteries typically undergo charging and discharging states. These repeated charge and discharge cycles cause the battery volume to expand and contract periodically, as well as the battery thickness T to increase and decrease repeatedly. This repeated volume change can damage the electrodes and solid electrolyte, leading to structural degradation of the battery and reduced cycle life and performance.

[0003] To address these issues, existing technologies typically use a pressurizing fixture to apply external pressure to all-solid-state batteries to mitigate the impact of volume changes during charge and discharge on their structural integrity. Specifically, by monitoring the battery's real-time state of charge (SOC), the pressurizing fixture dynamically adjusts the pressure applied to the battery based on changes in SOC, ensuring that the pressure changes linearly with SOC. This, to a certain extent, mitigates damage to the electrodes and electrolyte, maintaining the quality of the all-solid-state battery.

[0004] However, existing technologies have significant limitations. During the actual charge and discharge process of all-solid-state batteries, relying solely on the SOC value to adjust the pressure of the pressurizing fixture may not fully adapt to the complexity of battery volume changes and thickness changes. In particular, in certain specific SOC ranges or under rapid charge and discharge conditions, the volume expansion or contraction of the battery may show nonlinear or sudden changes, which may also cause the degradation of the electrodes and solid electrolyte, thereby affecting the long-term performance and quality stability of the all-solid-state battery.

[0005] Therefore, there is an urgent need to develop an all-solid-state battery detection technology that comprehensively considers the multi-dimensional parameter characteristics of all-solid-state batteries during the charging and discharging process (such as SOC, pressure, thickness, etc.) to achieve more comprehensive all-solid-state battery detection, which can further inhibit the degradation of the all-solid-state battery structure and improve the cycle life, safety and overall performance of the all-solid-state battery. Summary of the Invention

[0006] The application provides a kind of full solid battery detection device and its detection method, to solve the technical problems that single dependence SOC value in prior art may not fully adapt to the complexity of battery volume change, thickness change, battery volume expansion or shrinkage may present nonlinear or sudden change, may also cause electrode and solid electrolyte deterioration, etc.Partly or entirely.In order to achieve the above purpose, the technical scheme is as follows: The first aspect is a kind of full solid battery detection device, comprising: Movable press, movable press contacts full solid battery; Laser unit, laser unit is installed on base; First acquisition unit, in the charging process of full solid battery, obtain charging pressure data F1, charging pressure data F1 is used to adjust movable press to move to change the pressure applied on full solid battery;According to charging pressure data F1, obtain the first height data H1 between movable press relative to base;In the charging process of full solid battery, laser unit measures the first actual distance data L1 between itself and movable press;Controller, according to first height data H1, first actual distance data L1, assess full solid battery charging state; Second acquisition unit, in the discharging process of full solid battery, obtain discharge pressure data F2, discharge pressure data F2 is used to adjust movable press to move to change the pressure applied on full solid battery;According to discharge pressure data F2, obtain the second height data H2 between movable press relative to base;In the discharging process of full solid battery, laser unit measures the second actual distance data L2 between itself and movable press;Controller, according to second height data H2, second actual distance data L2, assess full solid battery discharge state.

[0007] Optionally, assess full solid battery charging state includes: calculate full solid battery charging deformation data T1, judge whether full solid battery charging is qualified;Assess full solid battery discharge state includes: calculate full solid battery discharge deformation data T2, judge whether full solid battery discharge is qualified.

[0008] Optionally, full solid battery charging deformation data T1 includes: the i full solid battery SOC value when the i full solid battery charging deformation value T1i, full solid battery discharge deformation data T2 includes: the j full solid battery SOC value when the j full solid battery discharge deformation value T2j, satisfy: T1i=2(H1i-L1i) / (H1i+L1i) T2j=2(H2j-L2j) / (H2j+L2j) H1i is the height of the movable press relative to the base at the i-th full solid-state battery SOC value during the charging process, L1i is the actual distance measured by the laser unit between itself and the movable press at the i-th full solid-state battery SOC value during the charging process; H2j is the height of the movable press relative to the base at the j-th full solid-state battery SOC value during the discharging process, L2j is the actual distance measured by the laser unit between itself and the movable press at the j-th full solid-state battery SOC value during the discharging process, i = 1, 2, … n, j = 1, 2, … m, i, j are positive integers.

[0009] Optionally, the laser unit comprises a first laser, a second laser, the actual distance L1i measured by the laser unit between itself and the movable press at the i-th full solid-state battery SOC value, and the actual distance L2j measured by the laser unit between itself and the movable press at the j-th full solid-state battery SOC value are respectively: L1i = Max[L11i, L21i], L2j = Min[L11j, L21j] L11i is the actual distance measured by the first laser between itself and the movable press at the i-th full solid-state battery SOC value during the charging process of the full solid-state battery, and L21i is the actual distance measured by the second laser between itself and the movable press at the i-th full solid-state battery SOC value during the charging process of the full solid-state battery; L11j is the actual distance measured by the first laser between itself and the movable press at the j-th full solid-state battery SOC value during the discharging process of the full solid-state battery, and L21j is the actual distance measured by the second laser between itself and the movable press at the j-th full solid-state battery SOC value during the discharging process of the full solid-state battery.

[0010] Optionally, the charging pressure data F1 is obtained in advance, and the discharging pressure data F2 is obtained in advance, F1 = F01 + K1 * SOC, F2 = F02 + K2 * SOC, wherein F01 and F02 are constants, and K1 and K2 are coefficients.

[0011] The second aspect is a full solid-state battery detection method, which adopts the full solid-state battery detection device of any one of the first aspect, and comprises: Step S100: in the charging process of the full solid-state battery, charging pressure data F1 is obtained, the charging pressure data F1 is used to adjust the movable press to move to change the pressure applied on the full solid-state battery; according to the charging pressure data F1, the first height data H1 between the movable press and the base is obtained; in the charging process of the full solid-state battery, the laser unit measures the first actual distance data L1 between itself and the movable press; according to the first height data H1 and the first actual distance data L1, the charging state of the full solid-state battery is evaluated. Step S200: In the discharging process of the all-solid-state battery, the discharging pressure data F2 is obtained, which is used to adjust the movement of the movable press to change the pressure applied on the all-solid-state battery; according to the discharging pressure data F2, the second height data H2 between the movable press and the base is obtained; in the discharging process of the all-solid-state battery, the laser unit measures the second actual distance data L2 between itself and the movable press; according to the second height data H2 and the second actual distance data L2, the discharging state of the all-solid-state battery is evaluated.

[0012] Optionally, in step S100, evaluating the charging state of the all-solid-state battery comprises: calculating the charging deformation data T1 of the all-solid-state battery to determine whether the charging of the all-solid-state battery is qualified. In step S200, evaluating the discharging state of the all-solid-state battery comprises: calculating the discharging deformation data T2 of the all-solid-state battery to determine whether the discharging of the all-solid-state battery is qualified.

[0013] Optionally, in step S100, calculating the charging deformation data T1 of the all-solid-state battery comprises: According to the first height data H1 and the first actual distance data L1, the charging deformation data T1 of the all-solid-state battery is calculated, which comprises: the i-th all-solid-state battery charging deformation value T1i at the i-th all-solid-state battery SOC value, T1i=2(H1i-L1i) / (H1i+L1i); wherein H1i is the height of the movable press relative to the base at the i-th all-solid-state battery SOC value in the charging process, L1i is the actual distance between the laser unit and the movable press measured by the laser unit at the i-th all-solid-state battery SOC value in the charging process, i=1, 2,...n, i is a positive integer.

[0014] Optionally, in step S200, calculating the discharging deformation data T2 of the all-solid-state battery comprises: According to the second height data H2 and the second actual distance data L2, the discharging deformation data T2 of the all-solid-state battery is calculated, which comprises: the j-th all-solid-state battery discharging deformation value T2j at the j-th all-solid-state battery SOC value, T2j=2(H2j-L2j) / (H2j+L2j); wherein H2j is the height of the movable press relative to the base at the j-th all-solid-state battery SOC value in the discharging process, L2j is the actual distance between the laser unit and the movable press measured by the laser unit at the i-th all-solid-state battery SOC value in the discharging process, j=1, 2,...m, j is a positive integer.

[0015] Optionally, in step S100, the laser unit measures the actual distance L1i between itself and the movable press at the i-th full solid-state battery SOC value, L1i=Max[L11i, L21i], wherein L11i is the actual distance between the first laser and the movable press at the i-th full solid-state battery SOC value during the charging process of the full solid-state battery, and L21i is the actual distance between the second laser and the movable press at the i-th full solid-state battery SOC value during the charging process of the full solid-state battery; And / or, in step S200, the laser unit measures the actual distance L2j between itself and the movable press at the j-th full solid-state battery SOC value, L2j=Min[L11j, L21j], wherein L11j is the actual distance between the first laser and the movable press at the j-th full solid-state battery SOC value during the discharging process of the full solid-state battery, and L21j is the actual distance between the second laser and the movable press at the j-th full solid-state battery SOC value during the discharging process of the full solid-state battery; And / or, after step S200, step S300 is further included: generating a full solid-state battery detection result according to the result of judging whether the full solid-state battery charging is qualified, the result of judging whether the full solid-state battery discharging is qualified, when the full solid-state battery detection result is qualified, returning to step S100; and when the full solid-state battery detection result is unqualified, recycling the unqualified full solid-state battery.

[0016] Compared with the prior art, the present application has the following beneficial effects: (1) In the present application, first, the height data H1, H2 measured by the laser unit and the distance data L1, L2 obtained capture the thickness change of the full solid-state battery caused by volume expansion or shrinkage during the charging and discharging process, which can dynamically reflect the complex nonlinear change of the battery under different state of charge (SOC), and improve the reliability of the full solid-state battery charging and discharging state evaluation; in addition, the variable pressure regulation and thickness monitoring synergistically optimize the pressure applied to the full solid-state battery, reduce the damage to the electrode and solid-state electrolyte caused by volume change, reduce the structural degradation of the full solid-state battery, and through the synergy of dynamic control and high reliability detection, improve the safety and stability of the full solid-state battery detection, and provide technical support for the commercialization of full solid-state batteries.

[0017] (2) In the present application, firstly, through steps S100 and S200, charge pressure data F1 and discharge pressure data F2 are collected respectively, combined with the first actual distance data, the second actual distance data L2, the first height data H1 and the second height data H2 measured by the laser unit, the thickness change of the battery in the charging and discharging process is captured; in addition, the first actual distance data, the second actual distance data L2, the first height data H1 and the second height data H2 are comprehensively analyzed, the deformation data of the battery under different state of charge (SOC) is accurately evaluated, the structural degradation of the all-solid-state battery is reduced, and the reliability of the all-solid-state battery detection is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 For the background technology of the thickness change of the all-solid-state battery in charging and discharging; Figure 2 For the structural schematic diagram of the driving mechanism, the movable press, the all-solid-state battery and the base of the present application; Figure 3 For the structural schematic diagram of the all-solid-state battery detection device of the present application; Figure 4 For the partial component schematic diagram of the all-solid-state battery detection device of the present application; Figure 5 For the flowchart of step S100 and step S200 in the all-solid-state battery detection method of the present application; Figure 6 For the flowchart of the all-solid-state battery detection method of the present application; The drawings are used to provide further understanding of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application, and do not constitute a limitation on the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Hereinafter, some exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that, when adding reference numerals to the constituent elements of each drawing, the same constituent elements are designated by the same reference numerals even though they are illustrated on different drawings. In describing the exemplary embodiments, a detailed description of a well-known configuration or function associated with the exemplary embodiments will be omitted when it is determined that the detailed description can obscure the gist of the present disclosure.

[0022] In describing the constituent elements according to the exemplary embodiments, terms such as first, second, etc. can be used. These terms are used only to distinguish the constituent elements from other constituent elements, and the nature, order or sequence of the constituent elements is not limited by these terms; the terms "first", "second" are used for descriptive purposes only and cannot be construed to indicate or imply relative importance or imply a specified number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In addition, all terms used herein, including technical scientific terms, have the same meaning as commonly understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong (those skilled in the art), unless otherwise defined differently. Terms defined in a general dictionary should be interpreted to have a meaning matching the context in the relevant field, and should not be interpreted to have an idealized or overly formal meaning, unless clearly defined in the specification.

[0023] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. These terms are only intended to distinguish one component from another component, and these terms do not limit the nature, order or sequence of the constituent components. It will also be understood that the terms "include" and / or "comprise" used in the specification designate the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any one and all combinations of one or more of the associated listed items. Throughout the specification, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises an" or "comprising" will be understood to imply the inclusion of the stated elements but not the exclusion of any other elements. In addition, the terms "unit", "-er", "-piece", and "module" described in the specification mean a unit for processing at least one function and operation, and can be implemented by a hardware component or a software component and combinations thereof.

[0024] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments; based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] As shown in Figures 2 to 4 the first aspect, a solid-state battery detection device comprises: a movable press 200, the movable press contacts the solid-state battery; a laser unit 300, the laser unit is installed on the base 100; a first acquisition unit, during the charging process of the solid-state battery, the charging pressure data F1 is acquired, the charging pressure data F1 is used to adjust the movement of the movable press 200 to change the pressure applied on the solid-state battery; according to the charging pressure data F1, the first height data H1 between the movable press 200 and the base 100 is acquired; during the charging process of the solid-state battery, the laser unit measures the first actual distance data L1 between itself and the movable press; a controller, according to the first height data H1 and the first actual distance data L1, evaluates the charging state of the solid-state battery BS; a second acquisition unit, during the discharging process of the solid-state battery, the discharging pressure data F2 is acquired, the discharging pressure data F2 is used to adjust the movement of the movable press 200 to change the pressure applied on the solid-state battery; according to the discharging pressure data F2, the second height data H2 between the movable press 200 and the base 100 is acquired; during the discharging process of the solid-state battery, the laser unit measures the second actual distance data L2 between itself and the movable press; a controller, according to the second height data H2 and the second actual distance data L2, evaluates the discharging state of the solid-state battery BS.

[0026] In some embodiments, the laser unit can measure at sub-micron resolution, the solid-state battery BS is placed on the base, and the movable press 200 contacts the solid-state battery BS.

[0027] In some embodiments, the movable press 200 moves, for example, up and down, which can be achieved by a driving device, the driving mechanism D can include a cylinder DP with a piston, the piston realizes telescopic movement according to the supply and discharge of fluid, when the piston is elongated, the movable press 200 presses the solid-state battery BS, when the piston is retracted, the movable press 200 releases the solid-state battery BS, which belongs to the prior art in the prior art of variable pressurization of the solid-state battery, and the present application will not be described again.

[0028] In some embodiments, a controller (e.g., PLC, MCU, CPU, service, etc.) can control the action of the driving mechanism D, a pressure gauge or pressure sensor can measure the real-time pressure, the input can obtain the charging pressure data F1, the discharging pressure data F2, the charging pressure data F1 is used to adjust the movement of the movable pressing device 200 to change the pressure applied to the all-solid-state battery, that is, at least means that after obtaining the charging pressure data F1, according to the charging pressure data F1, the controller can control the adjustment of the movement of the movable pressing device 200, and in turn can change the pressure applied to the all-solid-state battery; the discharging pressure data F2 is used to adjust the movement of the movable pressing device 200 to change the pressure applied to the all-solid-state battery, that is, at least means that after obtaining the discharging pressure data F2, according to the discharging pressure data F2, the controller can control the adjustment of the movement of the movable pressing device 200, and in turn can change the pressure applied to the all-solid-state battery. The charging pressure data F1 and the discharging pressure data F2 can be linearly related to the state of charge (SOC) of the all-solid-state battery BS. These may or may not belong to the existing technology in the existing variable pressure of the all-solid-state battery, and the present application will not be repeated here.

[0029] In some embodiments, F1=F01+K1*SOC, F2=F02+K2*SOC, where F01 and F02 are constants, K1 and K2 are coefficients, and SOC is the state of charge value of the all-solid-state battery BS. SOC can be 0%, 50%, 100%, etc. These may or may not belong to the existing technology in the existing variable pressure of the all-solid-state battery, and the present application will not be repeated here.

[0030] In the present application, first, the height data H1 and H2 measured by the laser unit and the distance data L1 and L2 obtained capture the thickness change of the all-solid-state battery caused by volume expansion or shrinkage during charging and discharging, and can dynamically reflect the complex nonlinear change of the battery under different states of charge (SOC), thereby improving the reliability of the state of charge evaluation of the all-solid-state battery. In addition, the variable pressure adjustment and thickness monitoring work together to optimize the pressure applied to the all-solid-state battery, reduce the damage to the electrode and solid electrolyte caused by volume change, reduce the structural degradation of the all-solid-state battery, and through the cooperation of dynamic control and high reliability detection, improve the safety and stability of the all-solid-state battery detection, and provide technical support for the commercialization of all-solid-state batteries.

[0031] Optionally, evaluating the charging state of the all-solid-state battery BS includes calculating the charging deformation data T1 of the all-solid-state battery and determining whether the charging of the all-solid-state battery is qualified; evaluating the discharging state of the all-solid-state battery BS includes calculating the discharging deformation data T2 of the all-solid-state battery and determining whether the discharging of the all-solid-state battery is qualified.

[0032] In some embodiments, during the charging process of the all-solid-state battery, the pressure gauge or pressure sensor can be used to collect the charging pressure data F1 in real time; or the charging pressure data F1 can also be preset or stored in advance (F1=F01+K1*SOC, where F01 is a constant, K1 is a coefficient, and SOC is the state of charge), and the controller controls the driving mechanism according to the charging pressure data F1 to adjust the movement of the movable press, and optimizes the pressure applied to the all-solid-state battery. According to the piston displacement, the first height data H1 of the movable press relative to the base can be calculated.

[0033] In some embodiments, according to the known charging pressure data F1, the piston displacement can be determined, and the first acquisition unit can obtain the first height data H1 of the movable press relative to the base in advance. The charging pressure data F1 and the first height data H1 can be linearly changed or stored in the known test database.

[0034] In some embodiments, during the discharging process of the all-solid-state battery, similarly, the pressure gauge or pressure sensor can be used to collect the discharging pressure data F2 (F2=F02+K2*SOC, where F02 is a constant, K2 is a coefficient, and SOC is the state of charge) in real time, and the controller controls the driving mechanism according to the discharging pressure F2 data to adjust the movement of the movable press and optimizes the pressure applied to the all-solid-state battery. According to the piston displacement, the second height data H2 of the movable press relative to the base can be calculated.

[0035] In some embodiments, according to the known discharging pressure data F2, the piston displacement can be determined, and the second acquisition unit can obtain the second height data H2 of the movable press relative to the base in advance. The discharging pressure data F2 and the second height data H2 can be linearly changed or stored in the known test database.

[0036] In some embodiments, the laser unit measures the first actual distance data L1 between the movable press, and according to the first height data H1 and the first actual distance data L1, the charging deformation data T1 of the all-solid-state battery can be calculated. For example, the charging deformation data T1 can be obtained by the difference between the first height data H1 and the first actual distance data L1, which reflects the change of the battery thickness of the all-solid-state battery during the charging process. According to the comparison between the charging deformation data T1 and the first preset threshold, it is judged whether the battery charging state is qualified (for example, whether the charging deformation data is within the first preset threshold range).

[0037] In some embodiments, the laser unit measures second actual distance data L2 between itself and the movable press, and according to the second height data H2 and the second actual distance data L2, discharge deformation data T2 of the all-solid-state battery can be calculated. For example, the discharge deformation data T2 can be obtained by subtracting the second height data H2 from the second actual distance data L2, and reflects the thickness change of the all-solid-state battery during discharging. According to the comparison between the discharge deformation data T2 and the second preset threshold, it is determined whether the battery charging state is qualified (for example, whether the charging deformation data is within the second preset threshold range).

[0038] In the present application, the height (H1, H2) and distance (L1, L2) data measured by the laser unit are used to calculate the deformation data (T1, T2), which can capture the thickness change during the charging and discharging process of the battery with sub-micron accuracy. Based on the threshold comparison of the charging deformation data T1 and the discharging deformation data T2, it can be accurately determined whether the state of the battery during charging and discharging is qualified, and potential structural degradation risks can be identified in a timely manner, thereby improving the accuracy of the all-solid-state battery charging and discharging state evaluation, overcoming the limitations of single SOC adjustment under rapid charging and discharging or nonlinear volume change, and being suitable for diversified all-solid-state battery test scenarios.

[0039] Optionally, the all-solid-state battery charging deformation data T1 includes: the i-th all-solid-state battery charging deformation value T1i at the i-th all-solid-state battery SOC value, and the all-solid-state battery discharging deformation data T2 includes: the j-th all-solid-state battery discharging deformation value T2j at the j-th all-solid-state battery SOC value, which satisfies: T1i=2(H1i-L1i) / (H1i+L1i) T2j=2(H2j-L2j) / (H2j+L2j) Wherein, H1i is the height of the movable press relative to the base at the i-th all-solid-state battery SOC value during charging, L1i is the actual distance between the laser unit and the movable press measured by the laser unit at the i-th all-solid-state battery SOC value during charging; H2j is the height of the movable press relative to the base at the j-th all-solid-state battery SOC value during discharging, L2j is the actual distance between the laser unit and the movable press measured by the laser unit at the i-th all-solid-state battery SOC value during discharging, i=1, 2,...n, j=1, 2,...m, i, j are positive integers.

[0040] In some embodiments, the all-solid-state battery charging deformation data T1 includes: the first all-solid-state battery charging deformation value T11 at the first all-solid-state battery SOC value, the second all-solid-state battery charging deformation value T12 at the second all-solid-state battery SOC value,..., the i-th all-solid-state battery charging deformation value T1i at the i-th all-solid-state battery SOC value,..., and the n-th all-solid-state battery charging deformation value T1n at the n-th all-solid-state battery SOC value. In some embodiments, during the charging process of the all-solid-state battery, the first charging pressure data F1 includes: a first charging pressure value F11 at a first all-solid-state battery SOC value, a second charging pressure value F12 at a second all-solid-state battery SOC value,..., an i-th charging pressure value F1i at an i-th all-solid-state battery SOC value,..., and an n-th charging pressure value F1n at an n-th all-solid-state battery SOC value. In some embodiments, during the charging process of the all-solid-state battery, the first height data H1 includes: a height H11 of the movable press relative to the base at a first all-solid-state battery SOC value, a height H12 of the movable press relative to the base at a second all-solid-state battery SOC value,..., a height H1i of the movable press relative to the base at an i-th all-solid-state battery SOC value,..., and a height H1n of the movable press relative to the base at an n-th all-solid-state battery SOC value. In some embodiments, during the charging process of the all-solid-state battery, the first actual distance data L1 includes: an actual distance L11 between the laser unit and the movable press measured by the laser unit at a first all-solid-state battery SOC value, an actual distance L12 between the laser unit and the movable press measured by the laser unit at a second all-solid-state battery SOC value,..., an actual distance L1i between the laser unit and the movable press measured by the laser unit at an i-th all-solid-state battery SOC value,..., and an actual distance L1n between the laser unit and the movable press measured by the laser unit at an n-th all-solid-state battery SOC value. In some embodiments, the all-solid-state battery discharge deformation data T2 includes: a first all-solid-state battery discharge deformation value T21 at a first all-solid-state battery SOC value, a second all-solid-state battery discharge deformation value T22 at a second all-solid-state battery SOC value,..., a j-th all-solid-state battery discharge deformation value T2j at a j-th all-solid-state battery SOC value,..., and an m-th all-solid-state battery discharge deformation value T2m at an m-th all-solid-state battery SOC value. In some embodiments, during the discharging process of the all-solid-state battery, the discharging pressure data F2 includes: a first discharging pressure value F21 at a first all-solid-state battery SOC value, a second discharging pressure value F22 at a second all-solid-state battery SOC value,..., a j-th discharging pressure value F2j at a j-th all-solid-state battery SOC value,..., and an m-th discharging pressure value F2m at an m-th all-solid-state battery SOC value. In some embodiments, during the discharging process of the all-solid-state battery, the second height data H2 includes: a height H21 of the movable press relative to the base at a first all-solid-state battery SOC value, a height H22 of the movable press relative to the base at a second all-solid-state battery SOC value,..., a height H2j of the movable press relative to the base at a j-th all-solid-state battery SOC value,..., and a height H2m of the movable press relative to the base at an m-th all-solid-state battery SOC value. In some embodiments, during discharging of the all-solid-state battery, the second actual distance data L2 includes: an actual distance L21 between the laser unit and the movable press measured by the laser unit at the 1st all-solid-state battery SOC value; an actual distance L22 between the laser unit and the movable press measured by the laser unit at the 2nd all-solid-state battery SOC value; an actual distance L2j between the laser unit and the movable press measured by the laser unit at the jth all-solid-state battery SOC value; and an actual distance L2m between the laser unit and the movable press measured by the laser unit at the mth all-solid-state battery SOC value. In some embodiments, the charging deformation data T1i and (H1i-L1i) / H1i can be compared in difference or absolute difference value, and it is determined whether the battery charging state is qualified according to whether the difference or absolute difference value is within a first set threshold range (i.e., (T1i-(H1i-L1i) / H1i)≤e1 or |T1i-(H1i-L1i) / H1i|≤e1, e1 being the first set threshold).

[0041] In some embodiments, the charging deformation data T2j and (H2j-L2j) / H2j can be compared in difference or absolute difference value, and it is determined whether the battery charging state is qualified according to whether the difference or absolute difference value is within a second set threshold range (i.e., (T2j-(H2j-L2j) / H2j)≤e2 or |T2j-(H2j-L2j) / H2j|≤e2, e2 being the second set threshold).

[0042] In the present application, the controller can calculate the charging deformation data T1i and the discharging deformation data T2j of the all-solid-state battery at each SOC value, which is superior to the traditional single SOC monitoring, integrates the multiple SOC values, calculates the deformation data of the all-solid-state battery, and determines the charging and discharging state qualification, comprehensively reflects the dynamic changes of the battery at different states of charge, and improves the detection reliability of the all-solid-state battery.

[0043] Optionally, the first acquisition unit acquires the charging pressure data F1 in advance, and the second acquisition unit acquires the discharging pressure data F2 in advance; the laser unit includes a first laser 301 and a second laser 302, the actual distance L1i between the laser unit and the movable press measured by the laser unit at the i th all-solid-state battery SOC value, and the actual distance L2j between the laser unit and the movable press measured by the laser unit at the jth all-solid-state battery SOC value are respectively: L1i=Max[L11i, L21i], L2j=Min[L11j, L21j] Wherein, L11i is the actual distance between the first laser and the movable press measured by the first laser itself at the i-th full solid-state battery SOC value during the charging process of the full solid-state battery, L21i is the actual distance between the second laser and the movable press measured by the second laser itself at the i-th full solid-state battery SOC value during the charging process of the full solid-state battery; L11j is the actual distance between the first laser and the movable press measured by the first laser itself at the j-th full solid-state battery SOC value during the discharging process of the full solid-state battery, L21j is the actual distance between the second laser and the movable press measured by the second laser itself at the j-th full solid-state battery SOC value during the discharging process of the full solid-state battery.

[0044] In some embodiments, preferably, the first acquisition unit acquires the charging pressure data F1 in advance, and the second acquisition unit acquires the discharging pressure data F2 in advance, so that the piston movement displacement can be directly determined, and the first height data H1 of the movable press relative to the base and the second height data H2 of the movable press relative to the base can be obtained in advance, simplifying the acquisition process of the first height data and the second height data, and improving the efficiency of the full solid-state battery detection.

[0045] In some embodiments, the first laser measures the actual distance L11i between itself and the movable press during the charging process of the full solid-state battery, and the second laser measures the actual distance L21i between itself and the movable press. In order to capture the thickness change of the full solid-state battery during the charging process of the full solid-state battery, the full solid-state battery is usually expanded, and the maximum of L11i and L21i can be taken as the actual distance L1i between the laser unit and the movable press measured by the laser unit at the i-th full solid-state battery SOC value. Of course, the minimum of the distances measured by the first laser 301 and the second laser 302 can also be taken as L1i, which is not limited by those skilled in the art.

[0046] In some embodiments, the first laser measures the actual distance L11j between itself and the movable press during the discharging process of the full solid-state battery, and the second laser measures the actual distance L21j between itself and the movable press. In order to capture the thickness change of the full solid-state battery during the discharging process of the full solid-state battery, the full solid-state battery is usually contracted, and the minimum of L11j and L21j can be taken as the actual distance L2j between the laser unit and the movable press measured by the laser unit at the i-th full solid-state battery SOC value.

[0047] In some embodiments, during the charging process of the all-solid-state battery, the all-solid-state battery expands in volume due to lithium ions being embedded into the electrode material (such as silicon or lithium metal of the negative electrode), resulting in an increase in thickness. Taking the maximum value L1i of the actual distance measured by the first laser 301 and the second laser 302, the maximum increment of the thickness of the battery can be more accurately reflected, the peak value of the deformation caused by the expansion can be captured, and the maximum value can avoid underestimation caused by local uneven deformation or measurement point differences, so that the thickness change of the all-solid-state battery can be more conservatively evaluated, and the evaluated deformation data T1i can be ensured to represent the battery expansion state of the all-solid-state battery as much as possible.

[0048] In some embodiments, during the discharging process of the all-solid-state battery, lithium ions are removed from the electrode material, resulting in a volume contraction of the battery and a decrease in thickness. Taking the minimum value L2j of the distance measured by the first laser 301 and the second laser 302, the minimum value of the thickness of the battery can be more accurately reflected, the valley value of the deformation caused by the contraction can be captured, and the minimum value can timely detect the limit case of the thickness decrease, so as to ensure that the deformation data T2j sufficiently represents the battery contraction state as much as possible. Of course, the maximum value of the distance measured by the first laser 301 and the second laser 302 can also be taken as L2j, which is not limited by those skilled in the art.

[0049] In other embodiments, the laser unit can include a plurality of lasers (for example, 3, 4, 5, such as the first laser 301, the second laser 302, …, the kth laser 30k, k is greater than or equal to 3), which are arranged in a ring shape and fixed on the base 100. Based on the working principle of taking the maximum value during the charging process and taking the minimum value during the discharging process described above, the plurality of lasers arranged in a ring shape can realize multi-point synchronous measurement, thereby improving the dimension of the thickness change monitoring of the all-solid-state battery, but also increasing the cost of the laser unit.

[0050] Optionally, the controller further generates the all-solid-state battery detection result according to the result of judging whether the all-solid-state battery charging is qualified and the result of judging whether the all-solid-state battery discharging is qualified.

[0051] In some embodiments, the result of judging whether the all-solid-state battery charging is qualified includes: the all-solid-state battery charging is qualified or the all-solid-state battery charging is unqualified. In some embodiments, the result of judging whether the all-solid-state battery discharging is qualified includes: the all-solid-state battery discharging is qualified or the all-solid-state battery discharging is unqualified.

[0052] In some embodiments, when the all-solid-state battery charging is qualified and the all-solid-state battery discharging is qualified, the all-solid-state battery detection result is generated as: qualified; when the all-solid-state battery charging is unqualified and / or the all-solid-state battery discharging is unqualified, the all-solid-state battery detection result is generated as: unqualified.

[0053] As Figure 5 ,Figure 6 As shown in the second aspect, a full solid-state battery detection method, with or without the full solid-state battery detection device of any one of the first aspect, comprises: It should be noted that the full solid-state battery detection method of the present application, with or without the full solid-state battery detection device of any one of the first aspect, when the full solid-state battery detection device of any one of the first aspect is used, the corresponding technical problems, technical solutions and technical effects of the full solid-state battery detection device of any one of the first aspect are also included, and the present application will not be repeated here.

[0054] Step S100: In the charging process of the full solid-state battery, the charging pressure data F1 is obtained, which is used to adjust the movement of the movable pressing tool 200 to change the pressure applied to the full solid-state battery; according to the charging pressure data F1, the first height data H1 between the movable pressing tool 200 and the base 100 is obtained; in the charging process of the full solid-state battery, the laser unit measures the first actual distance data L1 between itself and the movable pressing tool; according to the first height data H1 and the first actual distance data L1, the charging state of the full solid-state battery BS is evaluated; Step S200: In the discharging process of the full solid-state battery, the discharging pressure data F2 is obtained, which is used to adjust the movement of the movable pressing tool 200 to change the pressure applied to the full solid-state battery; according to the discharging pressure data F2, the second height data H2 between the movable pressing tool 200 and the base 100 is obtained; in the discharging process of the full solid-state battery, the laser unit measures the second actual distance data L2 between itself and the movable pressing tool; according to the second height data H2 and the second actual distance data L2, the discharging state of the full solid-state battery BS is evaluated.

[0055] In some embodiments, in the charging process of the all-solid-state battery, the charging pressure data F1 is obtained, which is used to adjust the movement of the movable pressing device 200 to change the pressure applied to the all-solid-state battery; according to the charging pressure data F1, the first height data H1 between the movable pressing device 200 and the base 100 is obtained; in the charging process of the all-solid-state battery, the laser unit measures the first actual distance data L1 between itself and the movable pressing device; according to the first height data H1 and the first actual distance data L1, the technical problems, technical solutions and technical effects of the charging state of the all-solid-state battery BS can be evaluated, which are the same as those in the first aspect. The application will not be repeated here.

[0056] In some embodiments, in the discharging process of the all-solid-state battery, the discharging pressure data F2 is obtained, which is used to adjust the movement of the movable pressing device 200 to change the pressure applied to the all-solid-state battery; according to the discharging pressure data F2, the second height data H2 between the movable pressing device 200 and the base 100 is obtained; in the discharging process of the all-solid-state battery, the laser unit measures the second actual distance data L2 between itself and the movable pressing device; according to the second height data H2 and the second actual distance data L2, the technical problems, technical solutions and technical effects of the discharging state of the all-solid-state battery BS can be evaluated, which are the same as those in the first aspect. The application will not be repeated here.

[0057] Optionally, in step S100, the evaluating the charging state of the all-solid-state battery comprises: calculating charging deformation data T1 of the all-solid-state battery, and judging whether the charging of the all-solid-state battery is qualified; and in step S200, the evaluating the discharging state of the all-solid-state battery comprises: calculating discharging deformation data T2 of the all-solid-state battery, and judging whether the discharging of the all-solid-state battery is qualified.

[0058] In some embodiments, the technical problems, technical solutions and technical effects of the evaluating the charging state of the all-solid-state battery in step S100 and the evaluating the discharging state of the all-solid-state battery in step S200 can be completely same as those of the evaluating the charging state of the all-solid-state battery and the evaluating the discharging state of the all-solid-state battery in the first aspect, and the present application will not be repeated here.

[0059] Optionally, in step S100, the calculating the charging deformation data T1 of the all-solid-state battery comprises: According to the first height data H1 and the first actual distance data L1, the charging deformation data T1 of the all-solid-state battery is calculated, and the charging deformation data T1 of the all-solid-state battery comprises: an i-th all-solid-state battery charging deformation value T1i at an i-th all-solid-state battery SOC value, T1i=2(H1i-L1i) / (H1i+L1i). Wherein, H1i is the height of the movable press relative to the base at the i-th all-solid-state battery SOC value in the charging process, L1i is the actual distance between the laser unit and the movable press measured by the laser unit at the i-th all-solid-state battery SOC value in the charging process, and i=1, 2,...n, i is a positive integer.

[0060] In some embodiments, the technical problems, technical solutions and technical effects of the calculating the charging deformation data T1 of the all-solid-state battery in step S100 can be completely same as those of the calculating the charging deformation data T1 of the all-solid-state battery in the first aspect, and the present application will not be repeated here.

[0061] Optionally, in step S200, the calculating the discharging deformation data T2 of the all-solid-state battery comprises: According to the second height data H2 and the second actual distance data L2, the discharging deformation data T2 of the all-solid-state battery is calculated, and the discharging deformation data T2 of the all-solid-state battery comprises: a j-th all-solid-state battery discharging deformation value T2j at a j-th all-solid-state battery SOC value, T2j=2(H2j-L2j) / (H2j+L2j). Wherein, H2j is the height of the movable press relative to the base at the j-th all-solid-state battery SOC value in the discharging process, L2j is the actual distance between the laser unit and the movable press measured by the laser unit at the i-th all-solid-state battery SOC value in the discharging process, and j=1, 2,...m, j is a positive integer.

[0062] In some embodiments, the charging deformation data T1i can be compared with (H1i-L1i) / H1i in difference or absolute value difference, and whether the difference or absolute value difference is within a first set threshold range (i.e. (T1i-(H1i-L1i) / H1i)≤e1 or |T1i-(H1i-L1i) / H1i|≤e1, e1 is the first set threshold) is calculated to determine whether the battery charging state is qualified.

[0063] In some embodiments, the charging deformation data T2j can be compared with (H2j-L2j) / H2j in difference or absolute value difference, and whether the difference or absolute value difference is within a second set threshold range (i.e. (T2j-(H2j-L2j) / H2j)≤e2 or |T2j-(H2j-L2j) / H2j|≤e2, e2 is the second set threshold) is calculated to determine whether the battery charging state is qualified.

[0064] In some embodiments, the technical problems, technical solutions and technical effects of calculating the full solid-state battery discharge deformation data T2 in step S200 can be exactly the same as all the technical problems, technical solutions and technical effects of the full solid-state battery discharge deformation data T2 recorded in the first aspect, and the present application will not repeat them here.

[0065] Optionally, in step S100, the actual distance L1i between the laser unit and the movable press at the i-th full solid-state battery SOC value is measured, L1i=Max[L11i, L21i], wherein L11i is the actual distance L11i between the first laser and the movable press at the i-th full solid-state battery SOC value during the full solid-state battery charging process, and L21i is the actual distance L21i between the second laser and the movable press at the i-th full solid-state battery SOC value during the full solid-state battery charging process. In some embodiments, the technical problems, technical solutions and technical effects of measuring the actual distance L1i between the laser unit and the movable press at the i-th full solid-state battery SOC value in step S100 can be exactly the same as all the technical problems, technical solutions and technical effects of the actual distance L1i between the laser unit and the movable press at the i-th full solid-state battery SOC value recorded in the first aspect, and the present application will not repeat them here.

[0066] Optionally, in step S200, the actual distance L2j between the laser unit and the movable press at the jth full solid-state battery SOC value is measured, and is: L2j = Min[L11j, L21j], wherein L11j is the actual distance between the first laser and the movable press at the jth full solid-state battery SOC value during discharging of the full solid-state battery, and L21j is the actual distance between the second laser and the movable press at the jth full solid-state battery SOC value during discharging of the full solid-state battery.

[0067] In some embodiments, the technical problems, technical solutions and technical effects of measuring the actual distance L2j between the laser unit and the movable press at the jth full solid-state battery SOC value in step S200 can be the same as those of measuring the actual distance L2j between the laser unit and the movable press at the jth full solid-state battery SOC value in the first aspect, and the present application will not be repeated here.

[0068] Optionally, after step S200, step S300 of generating a full solid-state battery detection result according to the result of judging whether the full solid-state battery charging is qualified, the result of judging whether the full solid-state battery discharging is qualified, returning to step S100 when the full solid-state detection result is qualified, and recycling the unqualified full solid-state battery when the full solid-state detection result is unqualified is further included.

[0069] In some embodiments, in step S300, the result of judging whether the full solid-state battery charging is qualified includes that the full solid-state battery charging is qualified or the full solid-state battery charging is unqualified. In some embodiments, in step S300, the result of judging whether the full solid-state battery discharging is qualified includes that the full solid-state battery discharging is qualified or the full solid-state battery discharging is unqualified.

[0070] In some embodiments, in step S300, when the full solid-state battery charging is qualified and the full solid-state battery discharging is qualified, a full solid-state battery detection result of qualified is generated; and when the full solid-state battery charging is unqualified and / or the full solid-state battery discharging is unqualified, a full solid-state battery detection result of unqualified is generated.

[0071] In some embodiments, when the full solid-state detection result is qualified, the next full solid-state battery can be detected by returning to step S100; and when the full solid-state detection result is unqualified, the unqualified full solid-state battery is recycled.

[0072] In the all-solid-state battery detection method of the application, first, through steps S100 and S200, charge voltage stress data F and discharge voltage stress data F2 are collected respectively, and the first actual distance data, the second actual distance data L2, the first height data H1 and the second height data H2 measured by the laser unit are combined to capture the thickness change of the battery during the charging and discharging process; in addition, the first actual distance data, the second actual distance data L2, the first height data H1 and the second height data H2 are comprehensively analyzed to accurately evaluate the deformation data of the battery under different states of charge (SOC), reduce the structural degradation of the all-solid-state battery, and enhance the reliability of the all-solid-state battery detection.

[0073] It should be noted that the technical content not mentioned in the application (such as control mode, etc.) can belong to the prior art, and the above prior art has been realized through the applicant's own research and development technical materials and process verification before the application date, which does not constitute an understanding or implementation obstacle of the technical problems, technical solutions and technical effects of the application, and it belongs to the technical knowledge range known to those skilled in the art, and the application will not be described here. The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application. Those skilled in the art can understand that the steps, measures, schemes in various operations, methods and processes discussed in the application can be alternated, changed, combined or deleted; further, other steps, measures, schemes in various operations, methods and processes discussed in the application can be alternated, changed, rearranged, decomposed, combined or deleted; further, the steps, measures, schemes in various operations, methods and processes in the prior art can be alternated, changed, rearranged, decomposed, combined or deleted; The above-described embodiments only express several implementation manners of the present disclosure, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present disclosure. It should be noted that for those skilled in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the scope of the present disclosure; therefore, the protection scope of the present disclosure should be subject to the appended claims.

Claims

1. An all-solid-state battery detection device, characterized in that: include: A movable press, wherein the movable press contacts the all-solid-state battery; Laser unit, the laser unit is installed on the base; A first acquisition unit acquires charging pressure data F1 during the charging process of the all-solid-state battery, the charging pressure data F1 being used to adjust the movement of the movable press to change the pressure applied to the all-solid-state battery; and acquires first height data H1 of the movable press relative to the base based on the charging pressure data F1. During the charging process of the all-solid-state battery, the laser unit measures first actual distance data L1 between itself and the movable press; and a controller evaluates the charging state of the all-solid-state battery based on the first height data H1 and the first actual distance data L1. The second acquisition unit acquires discharge pressure data F2 during the discharge process of the all-solid-state battery. The discharge pressure data F2 is used to adjust the movement of the movable press to change the pressure applied to the all-solid-state battery; based on the discharge pressure data F2, the second height data H2 of the movable press relative to the base is acquired; during the discharge process of the all-solid-state battery, the laser unit measures the second actual distance data L2 between itself and the movable press; the controller evaluates the discharge state of the all-solid-state battery based on the second height data H2 and the second actual distance data L2.

2. The all-solid-state battery detection device according to claim 1, characterized in that: Evaluating the charging state of the all-solid-state battery includes: calculating the charging deformation data T1 of the all-solid-state battery to determine whether the charging of the all-solid-state battery is qualified; evaluating the discharging state of the all-solid-state battery includes: calculating the discharge deformation data T2 of the all-solid-state battery to determine whether the discharge of the all-solid-state battery is qualified.

3. The all-solid-state battery detection device according to claim 2, characterized in that: The all-solid-state battery charging deformation data T1 includes: the i-th all-solid-state battery charging deformation value T1i at the i-th all-solid-state battery SOC value, and the all-solid-state battery discharge deformation data T2 includes: the j-th all-solid-state battery discharge deformation value T2j at the j-th all-solid-state battery SOC value, satisfying: T1i=2(H1i-L1i) / (H1i+L1i) T2j=2(H2j-L2j) / (H2j+L2j) Wherein, H1i is the height of the movable press relative to the base at the i-th all-solid-state battery SOC value during the charging process, and L1i is the actual distance between the laser unit and the movable press measured at the i-th all-solid-state battery SOC value during the charging process; H2j is the height of the movable press relative to the base at the j-th all-solid-state battery SOC value during the discharging process, and L2j is the actual distance between the laser unit and the movable press measured at the j-th all-solid-state battery SOC value during the discharging process, i=1,2,...n,j=1,2,...m,i, and j is a positive integer.

4. The all-solid-state battery detection device according to claim 3, characterized in that: The laser unit includes a first laser and a second laser. When the SOC value of the i-th all-solid-state battery is reached, the actual distance L1i measured by the laser unit from itself to the movable press is measured. When the SOC value of the j-th all-solid-state battery is reached, the actual distance L2j measured by the laser unit from itself to the movable press is measured. L1i=Max[L11i, L21i], L2j=Min[L11j, L21j] Among them, L11i is the actual distance between the first laser and the movable press measured by the first laser at the i-th all-solid-state battery SOC value during the all-solid-state battery charging process, and L21i is the actual distance between the second laser and the movable press measured by the second laser at the i-th all-solid-state battery SOC value during the all-solid-state battery charging process; L11j is the actual distance between the first laser and the movable press measured by the first laser at the j-th all-solid-state battery SOC value during the all-solid-state battery discharging process, and L21j is the actual distance between the second laser and the movable press measured by the second laser at the j-th all-solid-state battery SOC value during the all-solid-state battery discharging process.

5. The all-solid-state battery detection device according to claim 2, characterized in that: The charging pressure data F1 is obtained in advance, and the discharging pressure data F2 is obtained in advance. F1=F01+K1*SOC, and F2=F02+K2*SOC, wherein F01 and F02 are constants, and K1 and K2 are coefficients.

6. A method for detecting an all-solid-state battery, using the all-solid-state battery detection device according to any one of claims 1 to 5, characterized in that: include: Step S100: During the charging process of the all-solid-state battery, charging pressure data F1 is obtained, and the charging pressure data F1 is used to adjust the movement of the movable press to change the pressure applied to the all-solid-state battery; based on the charging pressure data F1, first height data H1 of the movable press relative to the base is obtained; during the charging process of the all-solid-state battery, the laser unit measures first actual distance data L1 between itself and the movable press; based on the first height data H1 and the first actual distance data L1, the charging state of the all-solid-state battery is evaluated; Step S200: During the discharge process of the all-solid-state battery, the discharge pressure data F2 is obtained, and the discharge pressure data F2 is used to adjust the movement of the movable press to change the pressure applied to the all-solid-state battery; based on the discharge pressure data F2, the second height data H2 of the movable press relative to the base is obtained; during the discharge process of the all-solid-state battery, the laser unit measures the second actual distance data L2 between itself and the movable press; based on the second height data H2 and the second actual distance data L2, the discharge state of the all-solid-state battery is evaluated.

7. The all-solid-state battery detection method according to claim 6, characterized in that: In step S100, evaluating the charging state of the all-solid-state battery includes: calculating the charging deformation data T1 of the all-solid-state battery and determining whether the charging of the all-solid-state battery is qualified; In step S200, evaluating the discharge state of the all-solid-state battery includes calculating the discharge deformation data T2 of the all-solid-state battery and determining whether the discharge of the all-solid-state battery is qualified.

8. The all-solid-state battery detection method according to claim 7, characterized in that: In step S100, calculating the charging deformation data T1 of the all-solid-state battery includes: According to the first height data H1 and the first actual distance data L1, the all-solid-state battery charging deformation data T1 is calculated, and the all-solid-state battery charging deformation data T1 includes: the i-th all-solid-state battery charging deformation value T1i at the i-th all-solid-state battery SOC value, T1i=2(H1i-L1i) / (H1i+L1i); wherein H1i is the height of the movable press relative to the base at the i-th all-solid-state battery SOC value during the charging process, L1i is the actual distance between the laser unit itself and the movable press measured at the i-th all-solid-state battery SOC value during the charging process, i=1,2,...n, i is a positive integer.

9. The all-solid-state battery detection method according to claim 8, characterized in that: In step S200, calculating the all-solid-state battery discharge deformation data T2 includes: According to the second height data H2 and the second actual distance data L2, the all-solid-state battery discharge deformation data T2 is calculated, and the all-solid-state battery discharge deformation data T2 includes: the j-th all-solid-state battery discharge deformation value T2j at the j-th all-solid-state battery SOC value, T2j=2(H2j-L2j) / (H2j+L2j); wherein, H2j is the height of the movable press relative to the base at the j-th all-solid-state battery SOC value during the discharge process, L2j is the actual distance between the laser unit measured by itself and the movable press at the i-th all-solid-state battery SOC value during the discharge process, and j=1,2,...m, j is a positive integer.

10. The all-solid-state battery detection method according to claim 9, characterized in that: In step S100, at the i-th all-solid-state battery SOC value, the laser unit measures the actual distance L1i between itself and the movable press, where L1i=Max[L11i, L21i], wherein L11i is the actual distance between the first laser measured by itself and the movable press at the i-th all-solid-state battery SOC value during the all-solid-state battery charging process, and L21i is the actual distance between the second laser measured by itself and the movable press at the i-th all-solid-state battery SOC value during the all-solid-state battery charging process; And / or, in step S200, the actual distance L2j between the laser unit itself and the movable press at the j-th all-solid-state battery SOC value is: L2j=Min[L11j, L21j], wherein L11j is the actual distance between the first laser unit itself and the movable press at the j-th all-solid-state battery SOC value during the discharge process of the all-solid-state battery, and L21j is the actual distance between the second laser unit itself and the movable press at the j-th all-solid-state battery SOC value during the discharge process of the all-solid-state battery; And / or, step S200 also includes step S300: based on the result of judging whether the all-solid-state battery is qualified for charging, judging whether the all-solid-state battery is qualified for discharging, generating an all-solid-state battery detection result, when the all-solid-state detection result is qualified, returning to step S100; when the all-solid-state detection result is unqualified, recycling the unqualified all-solid-state battery.

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