CTP battery glue state verification method, device, equipment and storage medium

Abstract

A method, device, equipment, and storage medium for verifying the CTP battery glue pressing state. The CTP battery glue pressing state verification method includes: obtaining multiple state parameters of the CTP battery block during the process of being pressed into the battery box; determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and pressing distance; obtaining the thickness of the structural adhesive between the battery box bottom plate and the battery block and the coverage area of ​​the structural adhesive based on the multiple state parameters and the extrusion overflow coefficient; and determining whether to stop glue pressing based on the thickness and coverage area of ​​the structural adhesive. By obtaining multiple state parameters of the battery block during the process of being pressed into the battery box, the thickness and coverage area of ​​the structural adhesive between the current battery block and the battery box bottom plate can be obtained. Finally, based on these two pieces of information, the current CTP battery glue pressing state can be determined, and it can be determined whether glue pressing needs to be stopped.

Description

Technical Field

[0001] The present application relates to the technical field of CTP battery production, and in particular to a method, device, equipment and storage medium for verifying the glue pressing status of a CTP battery. Background Art

[0002] The battery cells of existing CTP batteries are directly pressed into the battery box and bonded to the box through thermally conductive structural adhesive at the bottom. The thickness and area of ​​the adhesive layer have a great impact on the performance of the battery cells.

[0003] Currently, the glue pressing force of battery cells is determined by dissecting the battery to determine the quality of the glue coating, which is costly and poses safety risks. Summary of the Invention

[0004] The present application provides a CTP battery glue state verification method, device, equipment and storage medium, which can solve the related problems existing in the above-mentioned technology.

[0005] In a first aspect, the present invention provides a method for verifying the glue pressing status of a CTP battery, which adopts the following technical solutions:

[0006] A method for verifying the glue pressing state of a CTP battery, the method comprising:

[0007] Obtaining various state parameters of the CTP battery block during the process of being pressed into the battery box; wherein the state parameters include the pressing distance of the battery block, the measured downward pressure on the battery block in the pressing direction, the weight of the battery block, the friction coefficient between the battery box and the battery block periphery, the extrusion force between the battery block periphery and the battery box, and the pressure required for glue flattening;

[0008] Determining an extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate according to the measured downward pressure and the pressing distance;

[0009] Obtaining the thickness of the structural adhesive between the battery box bottom plate and the battery block and the coverage area of ​​the structural adhesive based on the multiple state parameters and the extrusion overflow coefficient;

[0010] Whether to stop adhesive pressing is determined according to the thickness of the structural adhesive and the coverage area of ​​the structural adhesive.

[0011] In conjunction with the first aspect, in one embodiment, determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance includes the following steps:

[0012] According to the measured downward pressure and the pressing distance, a corresponding extrusion overflow coefficient is determined from a plurality of extrusion overflow coefficients related to the measured downward pressure and the pressing distance measured in advance based on the bottom plate of the battery box.

[0013] In conjunction with the first aspect, in one embodiment, determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance includes the following steps:

[0014] Determining a corresponding calibration overflow coefficient based on the measured downforce and the press-in distance from a plurality of extrusion overflow coefficients related to the measured downforce and the press-in distance measured in advance based on a calibration base plate;

[0015] The extrusion overflow coefficient of the structural adhesive between the battery block and the battery box bottom plate is obtained according to the calibrated overflow coefficient, the elastic modulus coefficient of the calibrated bottom plate, and the elastic modulus coefficient of the battery box bottom plate.

[0016] In combination with the first aspect, in one embodiment, the extrusion overflow coefficient of the structural adhesive between the battery block and the battery box bottom plate is obtained according to the calibration overflow coefficient, the elastic modulus coefficient of the calibration bottom plate, and the elastic modulus coefficient of the battery box bottom plate.

[0017] The ratio of the measured downward pressure to the elastic modulus coefficient of the battery box bottom plate is equal to the ratio of the calculated extrusion force to the elastic modulus coefficient of the calibrated bottom plate.

[0018] In conjunction with the first aspect, in one embodiment, the method for determining the calibration spillover coefficient includes:

[0019] Obtaining the thickness and coverage area of ​​the structural adhesive between the battery block and a calibration base plate at the bottom of the calibration battery box when the battery block is pressed into the pressing distance under the measured downward pressure; wherein the calibration base plate is a transparent plate, the coverage area of ​​the structural adhesive is obtained by direct observation, and the thickness of the structural adhesive is obtained by ultrasonic detection;

[0020] Obtaining the total amount of the structural adhesive squeezed out based on the thickness of the structural adhesive and the coverage area of ​​the structural adhesive;

[0021] The calibrated overflow coefficient is obtained according to the total amount of the structural adhesive.

[0022] In combination with the first aspect, in one embodiment, the calibration base plate is divided into a plurality of calculation grids of the same size, and the coverage area of ​​the structural adhesive is obtained according to the number of calculation grids covered by the structural adhesive.

[0023] In combination with the first aspect, in one embodiment, obtaining the thickness and coverage area of ​​the structural adhesive between the battery box bottom plate and the battery block based on the multiple state parameters and the extrusion overflow coefficient includes the following steps:

[0024] The coverage area of ​​the structural adhesive between the battery box bottom plate and the battery block is obtained based on the measured downward pressure, the deadweight of the battery block, the friction coefficient between the battery box and the peripheral side of the battery block, the extrusion force between the peripheral side of the battery block and the battery box, and the pressure required for adhesive flattening;

[0025] The thickness of the structural adhesive between the cell box bottom plate and the battery block is obtained based on the extrusion overflow coefficient, the coverage area of ​​the structural adhesive, the measured downward pressure, the weight of the battery block and the total amount of glue applied.

[0026] In a second aspect, the embodiment of the present application provides a CTP battery glue state verification device, which adopts the following technical solution:

[0027] A CTP battery glue pressing state verification device, the CTP battery glue pressing state verification device comprising:

[0028] an acquisition module configured to acquire various state parameters of the CTP battery block during the process of being pressed into the battery box; wherein the state parameters include the pressing distance of the battery block, the measured downward pressure on the battery block in the pressing direction, the weight of the battery block, the friction coefficient between the battery box and the battery block periphery, the squeezing force between the battery block periphery and the battery box, and the pressure required for glue flattening;

[0029] a calculation module configured to determine an extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance; and to obtain a thickness of the structural adhesive between the battery box bottom plate and the battery block and a coverage area of ​​the structural adhesive based on the plurality of state parameters and the extrusion overflow coefficient;

[0030] The judgment module is configured to judge whether to stop the glue pressing according to the thickness of the structural glue and the coverage area of ​​the structural glue.

[0031] In a third aspect, the present application provides a CTP battery glue state verification device, which adopts the following technical solutions:

[0032] A CTP battery glue state verification device, comprising a processor, a memory, and a CTP battery glue state verification program stored in the memory and executable by the processor, wherein when the CTP battery glue state verification program is executed by the processor, the steps of the CTP battery glue state verification method described above are implemented.

[0033] In a fourth aspect, an embodiment of the present application provides a storage medium, which adopts the following technical solution:

[0034] A storage medium stores a CTP battery glue state verification program, wherein when the CTP battery glue state verification program is executed by a processor, the steps of the CTP battery glue state verification method described above are implemented.

[0035] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0036] By obtaining multiple state parameters of the battery block during the process of being pressed into the battery box, the extrusion overflow coefficient of the structural adhesive between the battery block and the bottom plate of the battery box under the measured pressure and pressing distance is first obtained, and then the thickness and coverage area of ​​the structural adhesive between the current battery block and the bottom plate of the battery box can be obtained by further combining the extrusion overflow coefficient. Finally, based on these two pieces of information, the current CTP battery glue pressing state can be judged to determine whether the glue pressing needs to be stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of an embodiment of a method for verifying the glue pressing status of a CTP battery according to the present application;

[0038] Figure 2 This is a functional module diagram of an embodiment of a CTP battery glue state verification device of the present application;

[0039] Figure 3 This is a schematic diagram of the hardware structure of the CTP battery glue state verification device involved in the embodiment of this application. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] Existing CTP battery cells are directly pressed into the battery case and bonded to the case with a thermally conductive structural adhesive at the bottom. The thickness and surface area of ​​the adhesive layer significantly impact the performance of the battery cell. Currently, the adhesive pressure of the battery cell is determined by sectioning the battery to determine the quality of the adhesive, which is costly and poses safety risks.

[0042] Based on the above problems, the present application provides a CTP battery glue pressing status verification method, device, equipment and storage medium. The key point of the invention is that by obtaining multiple state parameters of the battery block during the process of being pressed into the battery box, the extrusion overflow coefficient of the structural adhesive between the battery block and the bottom plate of the battery box under the measured pressure and pressing distance is first obtained, and the thickness and coverage area of ​​the structural adhesive between the current battery block and the bottom plate of the battery box can be obtained by further combining the extrusion overflow coefficient. Finally, based on these two pieces of information, the current CTP battery glue pressing status can be judged to determine whether the glue pressing needs to be stopped.

[0043] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0044] In a first aspect, an embodiment of the present application provides a method for verifying the glue pressing status of a CTP battery.

[0045] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the CTP battery glue state verification method of this application. Figure 1 As shown, the CTP battery glue status verification method includes:

[0046] S100, obtaining various state parameters of the battery block of the CTP during the process of being pressed into the battery box; wherein the state parameters include the pressing distance of the battery block, the measured downward pressure on the battery block in the pressing direction, the deadweight of the battery block, the friction coefficient between the battery box and the peripheral side of the battery block, the extrusion force between the peripheral side of the battery block and the battery box, and the pressure required for glue flattening;

[0047] S200, determining an extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance;

[0048] S300, obtaining the thickness of the structural adhesive between the battery box bottom plate and the battery block and the coverage area of ​​the structural adhesive based on the multiple state parameters and the extrusion overflow coefficient;

[0049] S400: Determine whether to stop adhesive pressing according to the thickness of the structural adhesive and the coverage area of ​​the structural adhesive.

[0050] In this embodiment, by obtaining various state parameters of the battery block during the process of being pressed into the battery box, the extrusion overflow coefficient of the structural adhesive between the battery block and the bottom plate of the battery box under the measured pressure and pressing distance is first obtained, and then the thickness and coverage area of ​​the structural adhesive between the current battery block and the bottom plate of the battery box can be obtained by further combining the extrusion overflow coefficient. Finally, based on these two pieces of information, the current CTP battery glue pressing state can be judged to determine whether the glue pressing needs to be stopped.

[0051] Furthermore, step S400, obtaining the thickness and coverage area of ​​the structural adhesive between the battery box bottom plate and the battery block based on the multiple state parameters and the extrusion overflow coefficient, includes the following steps:

[0052] S410, obtaining the coverage area of ​​the structural adhesive between the battery box bottom plate and the battery block based on the measured downward pressure, the deadweight of the battery block, the friction coefficient between the battery box and the battery block periphery, the extrusion force between the battery block periphery and the battery box, and the pressure required for adhesive flattening;

[0053] S420. Calculate the thickness of the structural adhesive between the cell box bottom plate and the battery block based on the extrusion overflow coefficient, the coverage area of ​​the structural adhesive, the measured downward pressure, the deadweight of the battery block, and the total amount of adhesive applied.

[0054] Specifically, because the structural adhesive is uniformly and horizontally pressed between the battery block and the battery case floor, a force analysis of the stationary battery block in the stopped state shows that the measured downward pressure and gravity acting on the battery block are equal to the sum of the support provided by the structural adhesive below it and the friction between the inner wall of the battery case and the surrounding sides of the battery block. The friction between the inner wall of the battery case and the surrounding sides of the battery block is specifically derived from the extrusion force between the surrounding sides of the battery block and the battery case, as well as the friction coefficient between the battery case and the surrounding sides of the battery block. The support provided by the structural adhesive and the area of ​​the structural adhesive are related to the pressure required to flatten the adhesive. Therefore, based on the above relationship, the coverage area of ​​the structural adhesive between the battery block and the battery case floor can be calculated based on the various acquired state parameters.

[0055] Once the coverage area of ​​the structural adhesive is known, the thickness of the structural adhesive can be determined based on the total amount of structural adhesive between the battery block and the battery box bottom plate. This requires knowing the extrusion coefficient of the structural adhesive between the battery block and the battery box bottom plate under the measured pressure and insertion distance. This allows the volume of the extruded structural adhesive to be calculated, and the total amount of structural adhesive between the battery block and the battery box bottom plate to be determined based on the total amount of adhesive applied. Once the total amount of structural adhesive between the battery block and the battery box bottom plate is determined, the thickness of the structural adhesive can be calculated based on the coverage area, ultimately allowing the current adhesive pressing status to be determined.

[0056] It can be seen that one of the key points of implementing the above method is to obtain the extrusion overflow coefficient of the structural adhesive under the current measured downward pressure and the pressing distance. Therefore, further, in one embodiment, the step S200 of determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance includes the following steps:

[0057] S210. According to the measured downward pressure and the pressing distance, determine a corresponding extrusion overflow coefficient from a plurality of extrusion overflow coefficients related to the measured downward pressure and the pressing distance pre-measured based on the bottom plate of the battery box.

[0058] Specifically, by pre-testing the battery pack adhesive bonding based on the battery base plate and measuring the total amount of structural adhesive squeezed out of the area between the battery pack base plate and the battery pack under the target state, the extrusion coefficient under that state can be determined. Regarding how to measure the amount of structural adhesive squeezed out of the area between the battery pack base plate and the battery pack, different technical solutions can be adopted in different embodiments, and this application does not impose any further restrictions.

[0059] At the same time, considering that in the process of pre-pressing glue test based on the battery box, the technical solution of obtaining the total amount of structural adhesive currently squeezed out of the area between the battery box bottom plate and the battery block may be relatively difficult and costly, therefore, in other embodiments of the present application, step S200 will specifically include the following steps:

[0060] S210, determining a corresponding calibration overflow coefficient from a plurality of extrusion overflow coefficients related to the measured downforce and the press-in distance, which are pre-measured based on a calibration base plate;

[0061] S220. Obtain an extrusion overflow coefficient of the structural adhesive between the battery block and the battery box bottom plate according to the calibrated overflow coefficient, the elastic modulus coefficient of the calibrated bottom plate, and the elastic modulus coefficient of the battery box bottom plate.

[0062] Specifically, in some embodiments, the calibration base plate will be a base plate that can facilitate the determination of the total amount of structural adhesive currently squeezed out of the area between the battery box base plate and the battery pack. For example, in this embodiment, a transparent base plate capable of ultrasonic detection is used, so that the structural adhesive coverage area between the battery box base plate and the battery pack can be directly observed from the other side, and the thickness of the structural adhesive in the area between the battery box base plate and the battery pack can be further determined by ultrasonic detection or other methods. In other embodiments, other types of calibration base plates may be used for preliminary testing, and this application does not impose any restrictions on this.

[0063] In this embodiment, the method for determining the spillover coefficient in the preliminary test includes the following steps:

[0064] F100. Obtaining the thickness and coverage area of ​​the structural adhesive between the battery block and the calibration base plate at the bottom of the calibration battery box when the battery block is pressed into the insertion distance under the measured downward pressure; wherein the calibration base plate is a transparent plate, the coverage area of ​​the structural adhesive is obtained by direct observation, and the thickness of the structural adhesive is obtained by ultrasonic detection;

[0065] F200, obtaining the total amount of the structural adhesive squeezed out based on the thickness of the structural adhesive and the coverage area of ​​the structural adhesive;

[0066] F300: Obtain the calibration overflow coefficient according to the total amount of the structural adhesive.

[0067] In addition, due to the material differences between the calibration plate and the battery box bottom plate, there are differences in the states of the structural adhesive when being pressed on the two. Therefore, this application needs to further convert the calibration overflow coefficient obtained on the calibration plate into the extrusion overflow coefficient of the corresponding battery box bottom plate in step S220. The specific conversion logic is: the ratio of the measured downward pressure to the elastic modulus coefficient of the battery box bottom plate is equal to the ratio of the calculated extrusion force to the elastic modulus coefficient of the calibration bottom plate.

[0068] At the same time, in this embodiment, in order to facilitate the grasp of the coverage area of ​​the structural adhesive in the preliminary test, a plurality of calculation grids of the same size are divided on the calibration base plate. The coverage area of ​​the structural adhesive can be obtained based on the number of calculation grids covered by the structural adhesive and the area of ​​a single calculation grid. Furthermore, the coverage area of ​​the structural adhesive can be obtained by only observing the number of calculation grids involved in the structural adhesive, thereby effectively improving the calculation speed.

[0069] In combination with the solutions provided in the above embodiments, in this embodiment, a preliminary test is first completed on the calibration base plate before executing the CTP battery glue state verification method. During the preliminary test, the battery pack is pressed into the verification box and relevant data is collected to obtain the calibration overflow coefficient corresponding to the calibration base plate, which serves as the verification box bottom plate, under different pressures and pressing distances. It should be noted that except for the difference between the base plate and the battery box bottom plate, the other parts of the verification box are consistent with the battery box.

[0070] In preliminary testing, this embodiment will use a glue pressing tool to press the battery block downward. The bottom surface of the glue pressing tool is equipped with movable clamps that press against the side walls of the battery block from the circumference. Each movable clamp is connected to a pressure indicator to enable the glue pressing tool to obtain the clamping force applied to the battery block when clamping and shrinking the battery block. Furthermore, after the glue pressing tool is used to clamp the battery block and place it in the verification box, the reading of the pressure indicator during placement can be used to determine the clamping force applied to the battery block within the verification box, thereby facilitating the calculation of the friction force applied to the battery block in the downward pressing direction.

[0071] After obtaining the calibrated overflow coefficient of the calibration base plate at various pressures and insertion distances through preliminary testing, the corresponding extrusion overflow coefficient of the battery box base plate at various pressures and insertion distances in the actual battery box can be further determined. Furthermore, when executing the CTP battery adhesive state verification method, the thickness and coverage area of ​​the structural adhesive can be calculated based on the state parameters of the battery block during the battery box insertion process and the extrusion overflow coefficient.

[0072] In a second aspect, an embodiment of the present application also provides a CTP battery glue state verification device.

[0073] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the CTP battery glue state verification device of this application. Figure 2 As shown, the CTP battery glue state verification device includes:

[0074] The CTP battery glue pressing state verification device includes:

[0075] an acquisition module configured to acquire various state parameters of the CTP battery block during the process of being pressed into the battery box; wherein the state parameters include the pressing distance of the battery block, the measured downward pressure on the battery block in the pressing direction, the weight of the battery block, the friction coefficient between the battery box and the battery block periphery, the squeezing force between the battery block periphery and the battery box, and the pressure required for glue flattening;

[0076] a calculation module configured to determine an extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance; and to obtain a thickness of the structural adhesive between the battery box bottom plate and the battery block and a coverage area of ​​the structural adhesive based on the plurality of state parameters and the extrusion overflow coefficient;

[0077] The judgment module is configured to judge whether to stop the glue pressing according to the thickness of the structural glue and the coverage area of ​​the structural glue.

[0078] Among them, the functional implementation of each module in the above-mentioned CTP battery glue pressing state verification device corresponds to the various steps in the above-mentioned CTP battery glue pressing state verification method embodiment, and their functions and implementation processes are no longer repeated here.

[0079] In a third aspect, an embodiment of the present application provides a CTP battery glue state verification device, which can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0080] Reference Figure 3 , Figure 3Schematic diagram of the hardware structure of the CTP battery glue state verification device involved in the embodiment of the present application. In the embodiment of the present application, the CTP battery glue state verification device may include a processor, a memory, a communication interface and a communication bus.

[0081] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0082] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, which are used to interconnect components within the CTP battery glue status verification device, as well as interfaces used to interconnect the CTP battery glue status verification device with other devices (such as other computing devices or user devices). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user devices can be displays, keyboards, etc.

[0083] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0084] The processor may be a general-purpose processor that can call a CTP battery glue state verification program stored in a memory and execute the CTP battery glue state verification method provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the CTP battery glue state verification program is called can refer to the various embodiments of the CTP battery glue state verification method of the present application and will not be repeated here.

[0085] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0086] In a fourth aspect, an embodiment of the present application also provides a storage medium.

[0087] The storage medium of the present application stores a CTP battery glue state verification program, wherein when the CTP battery glue state verification program is executed by the processor, the steps of the CTP battery glue state verification method as described above are implemented.

[0088] Among them, the method implemented when the CTP battery glue state verification program is executed can refer to the various embodiments of the CTP battery glue state verification method of this application, and will not be repeated here.

[0089] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0090] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0091] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0092] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0093] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0094] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0095] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A CTP battery glue state verification method, characterized in that: The CTP battery glue pressing state verification method includes: Obtaining various state parameters of the CTP battery block during the process of being pressed into the battery box; wherein the state parameters include the total amount of glue applied, the pressing distance of the battery block, the measured downward pressure on the battery block in the pressing direction, the weight of the battery block, the friction coefficient between the battery box and the battery block periphery, the extrusion force between the battery block periphery and the battery box, and the pressure required for glue flattening; Determining an extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate according to the measured downward pressure and the pressing distance; Obtaining the thickness of the structural adhesive between the battery box bottom plate and the battery block and the coverage area of ​​the structural adhesive based on the multiple state parameters and the extrusion overflow coefficient; Determining whether to stop adhesive pressing according to the thickness of the structural adhesive and the coverage area of ​​the structural adhesive; Determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance includes the following steps: Determining a corresponding calibration overflow coefficient based on the measured downforce and the press-in distance from a plurality of extrusion overflow coefficients related to the measured downforce and the press-in distance measured in advance based on a calibration base plate; The extrusion overflow coefficient of the structural adhesive between the battery block and the battery box bottom plate is obtained according to the calibrated overflow coefficient, the elastic modulus coefficient of the calibrated bottom plate, and the elastic modulus coefficient of the battery box bottom plate.

2. The CTP battery glue state verification method according to claim 1, characterized in that: Determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance includes the following steps: According to the measured downward pressure and the pressing distance, a corresponding extrusion overflow coefficient is determined from a plurality of extrusion overflow coefficients related to the measured downward pressure and the pressing distance measured in advance based on the bottom plate of the battery box.

3. The CTP battery glue state verification method according to claim 1, characterized in that: The determination method of the calibration overflow coefficient comprises: Obtaining the thickness and coverage area of ​​the structural adhesive between the battery block and a calibration base plate at the bottom of the calibration battery box when the battery block is pressed into the pressing distance under the measured downward pressure; wherein the calibration base plate is a transparent plate, the coverage area of ​​the structural adhesive is obtained by direct observation, and the thickness of the structural adhesive is obtained by ultrasonic detection; Obtaining the total amount of the structural adhesive squeezed out based on the thickness of the structural adhesive and the coverage area of ​​the structural adhesive; The calibrated overflow coefficient is obtained according to the total amount of the structural adhesive.

4. The CTP battery glue state verification method according to claim 3, characterized in that: The extrusion overflow coefficient of the structural adhesive between the battery block and the battery box bottom plate is obtained according to the calibration overflow coefficient, the elastic modulus coefficient of the calibration bottom plate, and the elastic modulus coefficient of the battery box bottom plate. The ratio of the measured downward pressure to the elastic modulus coefficient of the battery box bottom plate is equal to the ratio of the calculated extrusion force to the elastic modulus coefficient of the calibrated bottom plate.

5. The CTP battery glue pressing state verification method according to claim 3, characterized in that: The calibration base plate is divided into a plurality of calculation grids of the same size, and the coverage area of ​​the structural adhesive is obtained according to the number of calculation grids covered by the structural adhesive.

6. The CTP battery glue pressing state verification method according to claim 5, characterized in that: The method of obtaining the thickness of the structural adhesive between the battery box bottom plate and the battery block and the coverage area of ​​the structural adhesive based on the multiple state parameters and the extrusion overflow coefficient includes the following steps: The coverage area of ​​the structural adhesive between the battery box bottom plate and the battery block is obtained based on the measured downward pressure, the deadweight of the battery block, the friction coefficient between the battery box and the peripheral side of the battery block, the extrusion force between the peripheral side of the battery block and the battery box, and the pressure required for adhesive flattening; The thickness of the structural adhesive between the cell box bottom plate and the battery block is obtained based on the extrusion overflow coefficient, the coverage area of ​​the structural adhesive, the measured downward pressure, the weight of the battery block and the total amount of glue applied.

7. A CTP battery glue state verification device, characterized in that: The CTP battery glue pressing state verification device includes: an acquisition module configured to acquire various state parameters of the CTP battery block during the process of being pressed into the battery box; wherein the state parameters include the pressing distance of the battery block, the measured downward pressure on the battery block in the pressing direction, the weight of the battery block, the friction coefficient between the battery box and the battery block periphery, the squeezing force between the battery block periphery and the battery box, and the pressure required for glue flattening; a calculation module configured to determine an extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance; and to obtain a thickness of the structural adhesive between the battery box bottom plate and the battery block and a coverage area of ​​the structural adhesive based on the plurality of state parameters and the extrusion overflow coefficient; a judgment module, configured to judge whether to stop the adhesive pressing according to the thickness of the structural adhesive and the coverage area of ​​the structural adhesive; Determining the extrusion overflow coefficient of the structural adhesive between the corresponding battery block and the battery box bottom plate based on the measured downward pressure and the pressing distance includes the following steps: Determining a corresponding calibration overflow coefficient based on the measured downforce and the press-in distance from a plurality of extrusion overflow coefficients related to the measured downforce and the press-in distance measured in advance based on a calibration base plate; The extrusion overflow coefficient of the structural adhesive between the battery block and the battery box bottom plate is obtained according to the calibrated overflow coefficient, the elastic modulus coefficient of the calibrated bottom plate, and the elastic modulus coefficient of the battery box bottom plate.

8. A CTP battery glue state verification device, characterized in that: The CTP battery glue state verification device includes a processor, a memory, and a CTP battery glue state verification program stored on the memory and executable by the processor, wherein when the CTP battery glue state verification program is executed by the processor, the steps of the CTP battery glue state verification method as described in any one of claims 1 to 6 are implemented.

9. A storage medium, characterized in that: The storage medium stores a CTP battery glue state verification program, wherein when the CTP battery glue state verification program is executed by the processor, the steps of the CTP battery glue state verification method according to any one of claims 1 to 6 are implemented.

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