Battery negative electrode adhesive distribution detection device and method and storage medium

Abstract

The invention relates to a battery negative electrode adhesive distribution detection device and method and a storage medium, in the device, a supporting frame and a reaction substance are arranged in a reaction container, the supporting surface of the supporting frame and the reaction substance are arranged at an interval, and the supporting surface supports a negative electrode plate to be detected; the temperature adjusting equipment is used for adjusting the temperature of the reaction substance, so that the reaction substance reacts with the adhesive in the negative plate to be detected, and a reaction pole plate is obtained; cutting the reaction pole piece by cutting equipment to obtain a pole piece cutting surface; the scanning equipment scans the cutting surface of the pole piece based on the tracer element to obtain scanning data, and determines an adhesive distribution result of the to-be-detected negative pole piece according to the scanning data, so as to characterize the distribution of the adhesive in the battery negative pole piece. Therefore, non-uniform reaction or complete reaction between the substrate and the reaction substance caused by direct contact between the reaction substance and the to-be-detected negative plate is avoided, the reaction uniformity is improved, the original structure of the to-be-detected negative plate is ensured not to be damaged, and the accuracy of the detection result is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery negative electrode adhesive distribution detection device, method and storage medium. Background Art

[0002] The rational use of binders in battery negative electrode sheets is an important part of the battery manufacturing process. The negative electrode sheet adhesive is mainly responsible for firmly bonding the negative electrode material to the battery substrate. It can not only fix the negative electrode material, improve battery performance and heat and corrosion resistance, but also improve battery performance under low temperature conditions.

[0003] At present, in the existing battery negative electrode adhesive distribution detection method, the electrode to be tested is usually stirred, rinsed with water and other operations, which can easily cause changes and damage to the electrode structure, resulting in reduced accuracy of the detection results. Summary of the invention

[0004] Based on this, a battery negative electrode adhesive distribution detection device, method and storage medium are provided.

[0005] In a first aspect, the present application provides a battery negative electrode adhesive distribution detection device, comprising:

[0006] A reaction container, wherein a support frame and a reaction substance having a tracer element are arranged in the reaction container, a support surface of the support frame is arranged at a distance from the reaction substance, and the support surface is used to support the negative electrode sheet to be tested, so that the reaction substance is isolated from the negative electrode sheet to be tested;

[0007] A temperature regulating device is used to regulate the temperature of the reaction material so that the reaction material reacts with the adhesive in the negative electrode sheet to be tested to obtain a reaction electrode sheet with a tracer element;

[0008] Cutting equipment, the cutting equipment is used to cut the reaction pole piece to obtain the pole piece cutting surface;

[0009] The scanning device scans the cut surface of the electrode sheet based on the tracer element to obtain scanning data, and determines the adhesive distribution result of the negative electrode sheet to be tested based on the scanning data.

[0010] In one embodiment, the reaction container includes a receiving chamber and a cover, wherein the receiving chamber has an opening;

[0011] The containing cavity is used to contain the reaction material and the supporting frame; the cover body is sealed at the opening.

[0012] In one of the embodiments, the battery negative electrode adhesive distribution detection device further includes an absorption cover plate;

[0013] The absorption cover plate is used to cover the opening based on a first preset time after the cover body is opened and before the reaction electrode is taken out, so as to absorb the remaining reaction material in the accommodating cavity.

[0014] In one embodiment, in a single negative electrode sheet to be tested, the content of the reaction material used per 1 square centimeter of the negative electrode sheet to be tested is 0.1 to 0.5 mL;

[0015] And / or, corresponding to the plurality of negative electrode sheets to be tested, for each additional negative electrode sheet to be tested, the content of the reaction material used for each additional 1 square centimeter of the negative electrode sheet to be tested is 0.05 to 0.2 mL.

[0016] In one embodiment, the reaction site is liquid bromine; and the tracer element is bromine.

[0017] In one embodiment, the cutting device is an ion beam cutting device.

[0018] In a second aspect, the present application provides a method for detecting the distribution of a negative electrode adhesive of a battery, which is applied to a negative electrode adhesive distribution detection device of a battery as described above, and the method for detecting the distribution of a negative electrode adhesive of a battery comprises the following steps:

[0019] Injecting a preset amount of reaction material into the reaction container, placing the negative electrode sheet to be tested on the support surface of the support frame to isolate the reaction material from the negative electrode sheet to be tested;

[0020] Controlling the temperature regulating device to regulate the temperature of the reaction substance so that the reaction substance reacts with the binder in the negative electrode sheet to be tested to obtain a reaction electrode sheet with a tracer element;

[0021] Controlling the cutting equipment to cut the reaction electrode to obtain the electrode cutting surface;

[0022] The electrode cut surface is scanned by a scanning device based on the tracer element to obtain scanning data, and the adhesive distribution result of the negative electrode to be tested is determined based on the scanning data.

[0023] In one embodiment, the step of injecting a predetermined amount of reaction material into the reaction container includes:

[0024] Obtaining the electrode area of ​​the negative electrode to be tested;

[0025] According to the electrode area, the preset area and content mapping relationship is queried to obtain the preset content corresponding to the electrode area.

[0026] In one embodiment, the step of scanning the cut surface of the pole piece based on the tracer element by a scanning device to obtain the scanning data includes:

[0027] Controlling the scanning device to perform surface scanning on the cut surface of the pole piece based on the SEM mode to obtain a scanning image;

[0028] The control scanning device performs tracer element distribution scanning on the electrode cutting surface based on the EDS mode to obtain an element distribution map.

[0029] In one embodiment, the step of controlling the temperature regulating device to regulate the temperature of the reaction material so that the reaction material reacts with the binder in the negative electrode sheet to be tested to obtain the reaction electrode sheet with the tracer element includes:

[0030] Controlling the temperature adjustment device to adjust the temperature of the reaction material based on the second preset time and the first preset temperature so that the reaction material reacts with the binder in the negative electrode sheet to be tested;

[0031] When the temperature in the reaction container reaches a second preset temperature, the reaction electrode in the reaction container is obtained.

[0032] In one embodiment, when the temperature in the reaction container reaches a second preset temperature, the step of obtaining the reaction electrode in the reaction container includes:

[0033] When the temperature in the reaction container reaches a second preset temperature, the reaction container is opened, and the absorption cover plate is placed on the opening of the reaction container;

[0034] When the covering time of the absorption cover plate reaches a first preset time, the reaction electrode in the reaction container is obtained.

[0035] In one embodiment, the step of controlling the cutting device to cut the reaction electrode to obtain the electrode cutting surface includes:

[0036] When the substrate and the coating area in the reaction electrode are separated, the substrate and the coating area are fixed by conductive glue to obtain a fixed reaction electrode;

[0037] The steps of controlling the cutting device to cut the reaction electrode to obtain the electrode cutting surface include:

[0038] Control the cutting equipment to cut the fixed reaction pole piece to obtain the pole piece cutting surface.

[0039] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for detecting the distribution of a negative electrode adhesive of a battery.

[0040] One of the above technical solutions has the following advantages and beneficial effects:

[0041] The above-mentioned battery negative electrode adhesive distribution detection device includes a reaction container, a temperature adjustment device, a cutting device and a scanning device. A support frame and a reaction material with a tracer element are arranged in the reaction container. The support surface of the support frame is arranged at an interval from the reaction material, and the support surface is used to support the negative electrode sheet to be tested so as to isolate the reaction material from the negative electrode sheet to be tested; the temperature adjustment device is used to adjust the temperature of the reaction material so that the reaction material reacts with the adhesive in the negative electrode sheet to be tested to obtain a reaction electrode sheet with a tracer element; the cutting device is used to cut the reaction electrode sheet to obtain an electrode sheet cutting surface; the scanning device scans the electrode sheet cutting surface based on the tracer element to obtain scanning data, and determines the adhesive distribution result of the negative electrode sheet to be tested based on the scanning data, thereby realizing the characterization of the distribution of the adhesive in the battery negative electrode sheet. The present application isolates the reaction material from the negative electrode sheet to be tested by arranging a support frame in the reaction container; and by adjusting the temperature, the reaction material gradually reacts with the adhesive in the negative electrode sheet to be tested in an evaporation manner, thereby avoiding direct contact between the reaction material and the negative electrode sheet to be tested, which may cause uneven reaction or complete reaction between the substrate and the reaction material, thereby improving the uniformity of the reaction. At the same time, it avoids damage to the negative electrode sheet to be tested by operations such as stirring and washing with clean water, thereby ensuring that the original structure of the negative electrode sheet to be tested is not destroyed, thereby improving the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the first state structure of the battery negative electrode adhesive distribution detection device in an embodiment of the present application;

[0043] Figure 2 This is a schematic diagram of the second state structure of the battery negative electrode adhesive distribution detection device in the embodiment of the present application;

[0044] Figure 3 This is a schematic diagram of a first partial structure of a battery negative electrode adhesive distribution detection device in an embodiment of the present application;

[0045] Figure 4 This is a schematic diagram of a second partial structure of the battery negative electrode adhesive distribution detection device in an embodiment of the present application;

[0046] Figure 5 This is a SEM image based on metallographic cutting in a traditional detection device;

[0047] Figure 6 This is the EDS curve diagram based on metallographic cutting in the traditional detection device;

[0048] Figure 7 This is a SEM image of a battery negative electrode adhesive distribution detection device in an embodiment of the present application;

[0049] Figure 8 This is an EDS curve diagram of the battery negative electrode adhesive distribution detection method in the embodiment of the present application;

[0050] Fig. 9 It is an EDS curve diagram of the first sampling point of the battery negative electrode adhesive distribution detection method in the embodiment of the present application;

[0051] Fig.10 It is an EDS curve diagram of the second sampling point of the battery negative electrode adhesive distribution detection method in the embodiment of the present application;

[0052] Fig.11 This is a schematic diagram of a first process of a method for detecting the distribution of a negative electrode adhesive of a battery in an embodiment of the present application;

[0053] Fig.12 This is a second flow chart of the method for detecting the distribution of the negative electrode adhesive of a battery in an embodiment of the present application;

[0054] Fig.13 This is a first flow chart of the step of obtaining a reaction electrode in an embodiment of the present application;

[0055] Fig.14 This is a second flow chart of the reaction electrode acquisition step in the embodiment of the present application.

[0056] Reference numerals:

[0057] 10. Reaction container; 102. Support frame; 104. Reaction substance; 106. Accommodation chamber; 108. Cover; 20. Temperature regulating device; 30. Cutting device; 40. Scanning device; 50. Absorption cover plate; 60. Negative electrode to be tested; 70. Reaction electrode. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0059] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0060] In addition, the term "plurality" shall mean two or more.

[0061] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0062] In a traditional negative electrode adhesive distribution detection device, deionized water is usually used to clean the negative electrode sheet. However, water is usually used as a solvent for battery negative electrode ingredients. Using water for cleaning will inevitably lead to changes and damage to the membrane area structure, resulting in a significant reduction in the accuracy of the final detection result. In addition, it will also damage the negative electrode sheet, causing the surface of the negative electrode sheet cross section to be rough, further resulting in a reduction in the accuracy of the detection result. In another traditional negative electrode adhesive distribution detection device, it is usually necessary to use specific reactants and initiators to react the negative electrode sheet under stirring conditions. There are problems such as the use of mechanical stirring to cause the negative electrode sheet to break and the reaction time to be long, which will cause irreversible damage to the negative electrode sheet membrane area, thereby affecting the accuracy of the detection result.

[0063] The battery negative electrode adhesive distribution detection device of the present application can characterize the distribution of the adhesive on the battery negative electrode sheet, can avoid damage to the negative electrode sheet caused by operations such as stirring and rinsing the negative electrode sheet with clean water, ensure that the structure of the electrode film area is not damaged during the reaction process, and ensure that the negative electrode sheet reacts uniformly and completely, thereby improving the accuracy of the detection results. It is of great significance for guiding the parameter setting of the coating equipment, the setting of the coating speed, serving as a reference for the adhesive content in the battery negative electrode formula, and solving the low peeling force of the negative electrode formula.

[0064] In one embodiment, Figure 1 , Figure 3 and Figure 4As shown, a battery negative electrode adhesive distribution detection device is provided, including a reaction container 10, a temperature regulating device 20, a cutting device 30 and a scanning device 40, wherein a support frame 102 and a reaction substance 104 having a tracer element are arranged in the reaction container 10, and a support surface of the support frame 102 is spaced apart from the reaction substance 104, and the support surface is used to support a negative electrode sheet 60 to be tested, so that the reaction substance 104 is isolated from the negative electrode sheet 60 to be tested; the temperature regulating device 20 is used to regulate the temperature of the reaction substance 104, so that the reaction substance 104 reacts with the adhesive in the negative electrode sheet 60 to be tested, and obtains a reaction electrode sheet 70 having a tracer element; the cutting device 30 is used to cut the reaction electrode sheet 70 to obtain an electrode sheet cut surface; the scanning device 40 scans the electrode sheet cut surface based on the tracer element to obtain scanning data, and determines the adhesive distribution result of the negative electrode sheet 60 to be tested according to the scanning data.

[0065] Among them, the battery can be a lithium-ion battery, for example, the battery can be a lithium iron phosphate battery cell, a ternary battery cell or a manganese iron lithium battery cell. The shape of the battery can be, but is not limited to, square or cylindrical; the battery can be a laminated or wound battery, for example, the battery can include a negative electrode sheet, a diaphragm and a positive electrode sheet, the diaphragm is arranged between the negative electrode sheet and the positive electrode sheet, and the negative electrode sheet, the diaphragm and the positive electrode sheet are wound or stacked to obtain a corresponding battery. The negative electrode sheet 60 to be tested may include a substrate, a coating area is provided on the substrate, and an adhesive is provided on the coating area to be fixed to the base of the battery through the adhesive. The adhesive can be styrene-butadiene rubber (SBR), and the adhesive can be used to fix the negative electrode sheet, and can also be used to improve the battery performance and temperature resistance and corrosion resistance. Exemplarily, the negative electrode sheet of the battery can be cut to obtain a negative electrode sheet 60 of a preset area to be tested.

[0066] The reaction vessel 10 may be a closed reactor. A support frame 102 is provided in the reaction vessel 10, and the support frame 102 has a support surface, and the support surface is used to support the negative electrode sheet 60 to be tested. The support surface is spaced apart from the bottom surface of the reaction vessel 10, and the distance between the exemplary support surface and the bottom surface of the reaction vessel 10 is the spacing distance, which is greater than the depth of the reaction substance 104. The reaction substance 104 refers to the reaction substance 104 with a tracer element, and the reaction substance 104 can present a corresponding form according to the temperature, for example, the reaction substance 104 is in a liquid state at room temperature; when the temperature of the reaction substance 104 rises to a preset temperature threshold, it presents a gas state. The reaction substance 104 can react with the adhesive, so that the surface of the negative electrode sheet 60 to be tested has the tracer element, so that the surface distribution of the adhesive on the negative electrode sheet 60 to be tested can be determined according to the distribution of the tracer element.

[0067] Exemplarily, when the adhesive distribution test is performed on the negative electrode sheet 60 to be tested, the reaction substance 104 is first injected into the bottom of the reaction container 10, and then the negative electrode sheet 60 to be tested is placed on the support surface of the support frame 102, and the reaction container 10 is sealed, so that the negative electrode sheet 60 to be tested is isolated from the reaction substance 104 in the reaction container 10, so as to avoid the reaction substance 104 directly contacting the negative electrode sheet 60 to be tested and causing uneven reaction, and to avoid the substrate of the negative electrode sheet 60 to be tested from completely reacting with the reaction substance 104 and causing damage to the negative electrode sheet 60 to be tested.

[0068] The reaction electrode 70 refers to an electrode having tracer elements distributed on the negative electrode after the adhesive of the negative electrode 60 to be tested reacts with the reaction material 104. The temperature regulating device 20 can be used to heat or cool the reaction material 104 so that the reaction temperature of the reaction material 104 is maintained at a first preset temperature, so that the reaction material 104 reacts with the adhesive of the negative electrode 60 to be tested, thereby obtaining the reaction electrode 70. For example, the first preset temperature can be between 63°C and 67°C. The temperature regulating device 20 can be arranged outside the reaction container 10. The reaction container 10 is heated by the temperature regulating device 20 so that the reaction temperature of the reaction material 104 reaches the first preset temperature, and then the reaction material 104 gradually contacts with the adhesive of the negative electrode 60 to be tested in an evaporation manner, so that the reaction material 104 gradually reacts with the adhesive in the negative electrode 60 to be tested from the outside to the inside, thereby improving the uniformity of the reaction and ensuring that the original structure of the negative electrode 60 to be tested is not destroyed.

[0069] The cutting device 30 is used to cut the corresponding side of the reaction electrode 70, thereby obtaining a reaction electrode 70 with a cross section, and the cut interface is the electrode cutting surface. It should be noted that the cutting device 30 is used to cut the cross section of the coating area of ​​the reaction electrode 70, thereby facilitating the scanning device 40 to scan the tracer elements separately.

[0070] The scanning device 40 is used to scan the tracer element distribution on the electrode cutting surface, and then obtain corresponding scanning data, and then determine the adhesive distribution result of the negative electrode sheet 60 to be tested according to the scanning data. Exemplarily, the scanning setting can use the area on the electrode cutting surface where there is no void as the scanning area, and then scan the scanning area and then scan the data, so as to improve the accuracy of the scanning result.

[0071] In one example, the tracer element content is scanned on the electrode cut surface by the scanning device 40 to obtain a tracer element content distribution curve, so that the distribution of the adhesive in the negative electrode sheet 60 to be tested can be determined according to the corresponding tracer element content distribution curve.

[0072] In the above-mentioned embodiment, a support frame 102 and a reaction material 104 having a tracer element are arranged in the reaction container 10, and the support surface of the support frame 102 is arranged at an interval from the reaction material 104, and the support surface is used to support the negative electrode sheet 60 to be tested, so that the reaction material 104 is isolated from the negative electrode sheet 60 to be tested; the temperature regulating device 20 is used to regulate the temperature of the reaction material 104, so that the reaction material 104 reacts with the adhesive in the negative electrode sheet 60 to be tested to obtain a reaction electrode sheet 70 having a tracer element; the cutting device 30 is used to cut the reaction electrode sheet 70 to obtain an electrode sheet cutting surface; the scanning device 40 scans the electrode sheet cutting surface based on the tracer element to obtain scanning data, and determines the adhesive distribution result of the negative electrode sheet 60 to be tested according to the scanning data, so as to characterize the distribution of the adhesive in the negative electrode sheet of the battery. The present application sets a support frame 102 in the reaction container 10 to isolate the reaction substance 104 from the negative electrode sheet 60 to be tested; through the temperature adjustment method, the reaction substance 104 is gradually reacted with the adhesive in the negative electrode sheet 60 to be tested in an evaporation manner, thereby avoiding the reaction substance 104 from directly contacting the negative electrode sheet 60 to be tested to cause uneven reaction or causing the substrate and the reaction substance 104 to completely react, thereby improving the uniformity of the reaction, and at the same time avoiding the damage to the negative electrode sheet 60 to be tested caused by stirring, rinsing with clean water, etc., thereby ensuring that the original structure of the negative electrode sheet 60 to be tested is not destroyed, thereby improving the accuracy of the detection result.

[0073] In one embodiment, Figure 2 As shown, the reaction container 10 includes a receiving chamber 106 and a cover 108 . The receiving chamber 106 has an opening. The receiving chamber 106 is used to receive the reaction material 104 and the support frame 102 . The cover 108 is sealed at the opening.

[0074] The shape of the reaction container 10 may be, but is not limited to, a square or cylindrical shape, etc. The reaction container 10 has a accommodating chamber 106, and the interior of the accommodating chamber 106 has an anti-corrosion effect. For example, the reaction container 10 may be a container made of a metal or non-metal material having an anti-corrosion effect. The top surface of the reaction container 10 may be provided with an opening, which is the opening of the accommodating chamber 106. The reaction container 10 also includes a cover 108, which may be detachably arranged on the opening by means of threaded connection or clamping, etc. When the cover 108 is fastened to the opening of the accommodating chamber 106, the reaction container 10 is sealed.

[0075] Exemplarily, when the adhesive distribution test is performed on the negative electrode sheet 60 to be tested, the cover 108 of the reaction container 10 is first opened, and then the reaction substance 104 is injected into the bottom of the reaction container 10; the negative electrode sheet 60 to be tested is placed on the supporting surface of the support frame 102 to ensure that the negative electrode sheet 60 to be tested is isolated from the reaction substance 104 in the reaction container 10, and then the cover 108 is tightened on the opening of the reaction container 10 to seal the reaction container 10 to prevent the reaction substance 104 from directly contacting the negative electrode sheet 60 to be tested and causing uneven reaction, and to prevent the substrate of the negative electrode sheet 60 to be tested from completely reacting with the reaction substance 104 and causing damage to the negative electrode sheet 60 to be tested. Furthermore, the temperature of the reaction material 104 in the reaction container 10 is adjusted by the temperature regulating device 20, so that the reaction temperature of the reaction material 104 reaches a first preset temperature, and then the reaction material 104 reacts with the adhesive in the negative electrode sheet 60 to be tested to obtain the reaction electrode sheet 70, thereby improving the uniformity of the reaction and avoiding the damage to the negative electrode sheet 60 to be tested caused by stirring, rinsing with clean water and other operations, thereby ensuring that the original structure of the negative electrode sheet 60 to be tested is not destroyed; the film area cross-section of the taken out reaction electrode sheet 70 is cut by the cutting device 30 to obtain the electrode sheet cutting surface; the electrode sheet cutting surface is scanned by the scanning device 40 to obtain a scanning result that can reflect the distribution of the tracer element, and then the distribution result of the adhesive of the negative electrode sheet 60 to be tested is determined according to the scanning result, thereby improving the accuracy of the detection result.

[0076] In one embodiment, Figure 2 As shown, the battery negative electrode adhesive distribution detection device also includes an absorption cover plate 50; the absorption cover plate 50 is used to cover the opening based on a first preset time after the cover body 108 is opened and before the reaction electrode 70 is taken out, so as to absorb the remaining reaction material 104 in the accommodating cavity 106.

[0077] The absorption cover 50 may be a dust-free paper cover having a material for absorbing the reaction substance 104. For example, the absorption cover 50 may be obtained by wetting the dust-free paper cover with a sodium thiosulfate solution. The first preset time may be obtained according to the system preset, for example, the first preset time may be set to 5 to 10 minutes.

[0078] Exemplarily, the temperature of the reaction material 104 in the reaction container 10 is adjusted by the temperature adjustment device 20. After the reaction electrode 70 is obtained, the cover 108 of the reaction container 10 is opened, and the absorption cover 50 is set to cover the opening of the reaction container 10. After a first preset time, the absorption cover 50 is opened, and then the reaction electrode 70 in the reaction container 10 is taken out, thereby avoiding the residual reaction material 104 in the accommodating cavity 106 from emitting and causing harm to the human body after the cover 108 of the reaction container 10 is opened, thereby improving the detection safety.

[0079] In one embodiment, corresponding to a single negative electrode sheet 60 to be tested, the content of the reaction substance 104 used per 1 square centimeter of the negative electrode sheet 60 to be tested is 0.1 to 0.5 mL; and / or, corresponding to a plurality of negative electrode sheets 60 to be tested, for each additional negative electrode sheet 60 to be tested, the content of the reaction substance 104 used per 1 square centimeter of the additional negative electrode sheet 60 to be tested is 0.05 to 0.2 mL.

[0080] The usage content of the reaction material 104 can be determined according to the area of ​​the negative electrode sheet 60 to be tested.

[0081] For example, in a accommodating cavity 106 with a volume of 0.1L, the content of the reaction substance 104 used for 1 square centimeter of the electrode piece is 0.1 to 0.5mL; when multiple negative electrode sheets 60 to be tested react at the same time, the reaction substance 104 content is increased by 0.05 to 0.2mL / cm2.

[0082] Exemplarily, a mapping relationship table between the electrode area and the content of the reaction substance 104 can be established in advance, and then the electrode area can be obtained by measuring the area of ​​the negative electrode 60 to be tested, and the corresponding mapping relationship table can be queried based on the electrode to obtain the content of the reaction substance 104 corresponding to the electrode area, so that the corresponding content of the reaction substance 104 can be accurately injected into the reaction container 10 to avoid excessive reaction of the reaction substance 104 and causing a large amount of reaction with the substrate of the negative electrode 60 to be tested, and to avoid the emission of a large amount of reaction substance 104 when the reaction container 10 is opened, causing harm to the environment and personnel, thereby improving the safety and reliability of the adhesive distribution detection of the negative electrode 60 to be tested.

[0083] In one embodiment, the reaction site is liquid bromine; and the tracer element is bromine (Br).

[0084] For example, when the adhesive distribution of the negative electrode sheet 60 to be tested is detected, the cover 108 of the reaction container 10 is first opened, and then a preset content of liquid bromine is injected into the bottom of the reaction container 10; the negative electrode sheet 60 to be tested is placed on the supporting surface of the support frame 102 to ensure that the negative electrode sheet 60 to be tested is isolated from the liquid bromine in the reaction container 10, and then the cover 108 is tightened on the opening of the reaction container 10 to seal the reaction container 10 to prevent the liquid bromine from directly contacting the negative electrode sheet 60 to be tested and causing uneven reaction, and to prevent the substrate of the negative electrode sheet 60 to be tested from completely reacting with the liquid bromine and causing damage to the negative electrode sheet 60 to be tested. The temperature of the liquid bromine in the reaction container 10 is adjusted by the temperature regulating device 20, so that the reaction temperature of the liquid bromine reaches the first preset temperature and then evaporates, and then the liquid bromine reacts with the adhesive in the negative electrode sheet 60 to be tested to obtain a reaction electrode sheet 70 with bromine elements, thereby improving the uniformity of the reaction and avoiding damage to the negative electrode sheet 60 to be tested due to operations such as stirring and rinsing the negative electrode sheet 60 to be tested, thereby ensuring that the original structure of the negative electrode sheet 60 to be tested is not damaged; the film area cross-section of the taken out reaction electrode sheet 70 is cut by the cutting device 30 to obtain the electrode sheet cutting surface; the electrode sheet cutting surface is scanned by the scanning device 40 to obtain a scanning result that can reflect the distribution of the bromine element, and then the distribution result of the adhesive of the negative electrode sheet 60 to be tested is determined based on the scanning result, thereby improving the accuracy of the detection result.

[0085] In one embodiment, the cutting device 30 is an ion beam cutting device.

[0086] Among them, the ion beam cutting equipment can be a triple ion beam cutting instrument.

[0087] For example, the film section of the taken out reaction electrode 70 is cut based on the ion beam cutting equipment to obtain the electrode cutting surface, thereby avoiding the damage to the electrode film section caused by traditional mechanical cutting methods such as resin curing cutting or blade cutting, thereby improving the accuracy of scanning and judging the electrode cutting surface.

[0088] Exemplarily, the process of performing adhesive distribution detection on the negative electrode sheet to be tested is:

[0089] The negative electrode sheet is cut by a cutter to obtain a negative electrode sheet to be tested, and the size of the negative electrode sheet to be tested is measured to obtain the area of ​​the corresponding negative electrode sheet to be tested; according to the area of ​​the negative electrode sheet to be tested, a preset mapping relationship table is queried to obtain the corresponding liquid bromine content; the corresponding content of liquid bromine is injected into the bottom of the receiving cavity of the reaction container by a pipette gun, and then the support frame is placed in the receiving cavity of the reaction container, and then the negative electrode sheet to be tested is placed on the support surface of the support frame. Since the support surface of the support frame is suspended on the bottom surface of the receiving cavity, it is ensured that the negative electrode sheet to be tested is not in direct contact with the liquid bromine; after the placement is completed, the cover of the reaction container is tightened and placed on a temperature regulating device for temperature regulation (such as adjusting the temperature to 65°C) so that the negative electrode sheet to be tested React with the evaporated bromine, and after the second preset time (such as 4 hours), cool the reaction container naturally. After the reaction container is naturally cooled to room temperature, open the cover of the reaction container. After the cover is opened, use a dust-free paper cover moistened with sodium thiosulfate solution to cover the opening of the reaction container. After the first preset time (such as 5 to 10 minutes), remove the dust-free paper cover, and then take out the reaction electrode, thereby avoiding the harm of residual liquid bromine to the human body. It should be noted that during the removal of the reaction electrode, the coating area may be naturally separated from the substrate. If it is naturally separated, the remaining coating area of ​​the substrate is fixed by conductive glue; in addition, the front and back sides of the coating area are recorded to facilitate cutting of the cross-section of the coating area of ​​the reaction electrode.

[0090] The cross section of the coating area of ​​the reaction electrode is cut by an ion beam cutting device to obtain the electrode cut surface; the electrode cut surface is scanned by a scanning device using a SEM (scanning electron microscope) and an EDS (energy dispersive spectrometer) based on bromine as a tracer element to obtain a SEM image and an EDS curve graph, and then the distribution of the adhesive in the negative electrode to be tested is determined based on the SEM image and the EDS curve graph. For example, Figure 5 and Figure 6 As shown in the figure, the cross-section SEM image and the corresponding EDS line scan curve of the metallographic cutting after the resin curing reaction in the traditional method are shown. Due to the irreversible damage to the cross section caused by mechanical cutting, the line scan result of this method has low signal intensity and mixed distribution. Figure 7 and Figure 8 As shown in FIG. 1 , it is a SEM image and EDS curve diagram of the electrode cut surface using an ion beam cutting device, which can better reflect the distribution of the adhesive in the negative electrode to be tested; Figure 7 and Figure 8 It can be seen that the floating of the adhesive still exists after coating. This result can be used as an important reference for setting parameters such as the travel speed, oven temperature of the coating equipment, and wind frequency during the adhesive coating process of the negative electrode sheet, so as to optimize the battery negative electrode coating process.

[0091] For example, Fig. 9 and Fig.10As shown in the figure, EDS line scans can be performed on different sampling points on the same electrode cutting surface to obtain the corresponding EDS curves. Fig. 9 and Fig.10 It can be seen that similar results were obtained at different sampling points, that is, the slurry in the coating area close to the substrate direction of the negative electrode sheet to be tested gathered more binder. It should be noted that the EDS curve diagram obtained by the SEM scanning image and the EDS line scan can be used to investigate the cause of powder loss during the preparation of the corresponding negative electrode sheet to be tested.

[0092] In one embodiment, Fig.11 As shown, a method for detecting the distribution of a negative electrode adhesive of a battery is also provided, which is applied to any one of the above-mentioned devices for detecting the distribution of a negative electrode adhesive of a battery, and the method for detecting the distribution of a negative electrode adhesive of a battery comprises the following steps:

[0093] Step S110, injecting a preset content of reaction material into the reaction container, placing the negative electrode sheet to be tested on the support surface of the support frame, so that the reaction material is isolated from the negative electrode sheet to be tested.

[0094] For example, when performing adhesive distribution detection on the negative electrode sheet to be tested, a preset content of reaction material is first injected into the bottom of the reaction container, and then the negative electrode sheet to be tested is placed on the supporting surface of the support frame, and the reaction container is sealed to isolate the negative electrode sheet to be tested from the reaction material in the reaction container, thereby avoiding direct contact between the reaction material and the negative electrode sheet to be tested to cause uneven reaction, and avoiding complete reaction between the substrate of the negative electrode sheet to be tested and the reaction material to cause damage to the negative electrode sheet to be tested.

[0095] Step S120, controlling the temperature regulating device to regulate the temperature of the reaction material, so that the reaction material reacts with the adhesive in the negative electrode sheet to be tested, and obtains a reaction electrode sheet with a tracer element.

[0096] For example, the reaction container is heated by a temperature regulating device so that the reaction temperature of the reaction substance reaches a first preset temperature, and then the reaction substance gradually contacts the adhesive of the negative electrode sheet to be tested in an evaporation manner, so that the reaction substance gradually reacts with the adhesive in the negative electrode sheet to be tested from the outside to the inside, and then a reaction electrode sheet with a tracer element is obtained, thereby improving the uniformity of the reaction and ensuring that the original structure of the negative electrode sheet to be tested is not destroyed.

[0097] Step S130, controlling the cutting equipment to cut the reaction electrode to obtain the electrode cutting surface.

[0098] For example, the cutting device is an ion beam cutting device, and the cross section of the coating area of ​​the reaction electrode is cut by the ion beam cutting device to obtain a reaction electrode with a cross section. The cutting interface is the electrode cutting surface.

[0099] Step S140, scanning the cut surface of the electrode sheet based on the tracer element by means of a scanning device to obtain scanning data, and determining the adhesive distribution result of the negative electrode sheet to be tested according to the scanning data.

[0100] The tracer element distribution is scanned on the cut surface of the electrode piece by a scanning device to obtain corresponding scanning data, and then the adhesive distribution result of the negative electrode piece to be tested can be determined based on the scanning data.

[0101] In the above-mentioned embodiment, the reaction substance is isolated from the negative electrode sheet to be tested, and the temperature is adjusted so that the reaction substance gradually reacts with the adhesive in the negative electrode sheet to be tested in an evaporation manner, thereby avoiding direct contact between the reaction substance and the negative electrode sheet to be tested, which may cause uneven reaction or complete reaction between the substrate and the reaction substance, thereby improving the uniformity of the reaction. At the same time, it is avoided that the negative electrode sheet to be tested is stirred, rinsed with clean water, etc., which may cause damage to the negative electrode sheet to be tested, thereby ensuring that the original structure of the negative electrode sheet to be tested is not destroyed. The reaction electrode sheet is cut by a cutting device, and the cut surface of the electrode sheet after cutting is scanned by a scanning device, and then the distribution of the adhesive of the negative electrode sheet to be tested is accurately characterized according to the scanning result, thereby improving the accuracy of the detection result.

[0102] In one embodiment, Fig.12 As shown, a method for detecting the distribution of a negative electrode adhesive of a battery is also provided, which is applied to any one of the above-mentioned devices for detecting the distribution of a negative electrode adhesive of a battery, and the method for detecting the distribution of a negative electrode adhesive of a battery comprises the following steps:

[0103] Step S200, obtaining the electrode area of ​​the negative electrode to be tested.

[0104] The negative electrode sheet to be tested can be obtained by cutting the negative electrode sheet of the battery. The shape of the negative electrode sheet to be tested can be, but is not limited to, a square.

[0105] For example, the size of the negative electrode sheet to be measured can be measured by a measuring instrument, and then the electrode sheet area corresponding to the negative electrode sheet to be measured can be obtained based on the measured size data.

[0106] Step S210, according to the electrode area, query the mapping relationship between the preset area and the content to obtain the preset content corresponding to the electrode area.

[0107] For example, a mapping relationship table between the electrode area and the content of the reaction substance can be established in advance based on historical test data. According to the measured electrode area of ​​the corresponding negative electrode to be tested, the preset content of the reaction substance corresponding to the electrode area is obtained by querying the corresponding preset area and content mapping relationship, so that the corresponding content of the reaction substance can be accurately injected into the reaction container, avoiding excessive reaction substances causing a large amount of reaction with the substrate of the negative electrode to be tested, and also avoiding the emission of a large amount of reaction substances when opening the reaction container to cause harm to the environment and personnel, thereby improving the safety and reliability of the adhesive distribution detection of the negative electrode to be tested.

[0108] Step S220, injecting a preset content of reaction material into the reaction container, placing the negative electrode sheet to be tested on the support surface of the support frame, so that the reaction material is isolated from the negative electrode sheet to be tested.

[0109] For the specific description of the above step S220, please refer to the description of the above embodiment, which will not be repeated here.

[0110] Step S230, controlling the temperature regulating device to regulate the temperature of the reaction material, so that the reaction material reacts with the adhesive in the negative electrode sheet to be tested, and obtains a reaction electrode sheet with a tracer element.

[0111] For the specific description of the above step S230, please refer to the description of the above embodiment, which will not be repeated here.

[0112] Step S240, controlling the cutting equipment to cut the reaction electrode to obtain the electrode cutting surface.

[0113] For the specific description of the above step S240, please refer to the description of the above embodiment, which will not be repeated here.

[0114] Step S250, scanning the cut surface of the electrode sheet based on the tracer element by means of a scanning device to obtain scanning data, and determining the adhesive distribution result of the negative electrode sheet to be tested according to the scanning data.

[0115] For the specific description of the above step S250, please refer to the description of the above embodiment, which will not be repeated here.

[0116] In the above-mentioned embodiment, the reaction substance is isolated from the negative electrode sheet to be tested to avoid the reaction substance from directly contacting the negative electrode sheet to be tested, thereby preventing the reaction substance from causing uneven reaction or causing complete reaction between the substrate and the reaction substance; the use content of the reaction substance is determined according to the area of ​​the negative electrode sheet to be tested, and the temperature is adjusted so that the reaction substance gradually reacts with the adhesive in the negative electrode sheet to be tested in an evaporation manner, ensuring that the reaction substance has a suitable content, so that the reaction substance and the adhesive react completely, and at the same time ensuring the integrity of the coating area of ​​the negative electrode sheet to be tested after the reaction, avoiding excessive reaction substances and the adhesive. The substrate of the negative electrode sheet to be tested undergoes a large number of reactions, which also avoids the escaping of a large amount of reaction materials after temperature adjustment when the reaction container is opened, causing harm to the environment or personnel, thereby improving the uniformity of the reaction. At the same time, it avoids the damage to the negative electrode sheet to be tested caused by operations such as stirring and washing with clean water, thereby ensuring that the original structure of the negative electrode sheet to be tested is not destroyed. The reaction electrode sheet is cut by a cutting device, and the cutting surface of the electrode sheet after cutting is scanned by a scanning device, thereby accurately characterizing the distribution of the adhesive of the negative electrode sheet to be tested according to the scanning result, thereby improving the accuracy of the detection result.

[0117] In one embodiment, the step of scanning the electrode cutting surface based on the tracer element by a scanning device to obtain scanning data includes:

[0118] The control scanning device performs surface scanning on the pole piece cutting surface based on the SEM mode to obtain a scanning image; the control scanning device performs tracer element distribution scanning on the pole piece cutting surface based on the EDS mode to obtain an element distribution map.

[0119] For example, the scanning device may integrate a scanning electron microscope and an energy spectrometer; the scanning device may scan the cut surface of the electrode piece by SEM to obtain a SEM image; the scanning device may scan the cut surface of the electrode piece by EDS based on a tracer element (such as bromine) to obtain an EDS curve graph, and then determine the distribution of the adhesive in the negative electrode piece to be tested based on the SEM image and the EDS curve graph, so as to accurately retrieve the distribution of the negative electrode adhesive of the battery. It should be noted that the EDS curve graph can be used to illustrate the signal intensity of the tracer element at different positions.

[0120] In one embodiment, Fig.13 As shown, the steps of controlling the temperature regulating device to regulate the temperature of the reaction material so that the reaction material reacts with the binder in the negative electrode sheet to be tested to obtain the reaction electrode sheet with the tracer element include:

[0121] Step S232, controlling the temperature adjustment device to adjust the temperature of the reaction material based on the second preset time and the first preset temperature, so that the reaction material reacts with the binder in the negative electrode sheet to be tested.

[0122] The second preset time can be obtained according to system presets, for example, the second preset time can be set to 4 hours. The first preset temperature can be obtained according to system presets, for example, the first preset temperature can be set to 63°C, 65°C or 67°C.

[0123] After injecting a preset content of reaction material into the reaction container and placing the negative electrode sheet to be tested, the cover of the reaction container is tightened and placed on a temperature regulating device for temperature regulation, so that the reaction temperature of the reaction container reaches a first preset temperature, and based on a second preset time (such as 4 hours), the negative electrode sheet to be tested reacts with the reaction material after heating and evaporation.

[0124] Step S234, when the temperature in the reaction container reaches the second preset temperature, obtaining the reaction electrode in the reaction container.

[0125] After the reaction time of the negative electrode adhesive to be tested reaches the second preset time, the reaction container is naturally cooled. After the reaction container is naturally cooled to the second preset temperature (such as room temperature), the cover of the reaction container is opened, and the reaction electrode is taken out after the cover is opened, thereby obtaining the reaction electrode in the reaction container.

[0126] In the above-mentioned embodiment, through the temperature adjustment method and the combination of the preset reaction time and reaction temperature, the reaction substance is allowed to gradually react with the adhesive in the negative electrode sheet to be tested in an evaporation manner, thereby avoiding the reaction substance directly contacting the negative electrode sheet to be tested to cause uneven reaction or causing complete reaction between the substrate and the reaction substance, thereby improving the uniformity of the reaction and facilitating improving the accuracy of subsequent detection.

[0127] In one embodiment, Fig.14 As shown, when the temperature in the reaction container reaches the second preset temperature, the step of obtaining the reaction electrode in the reaction container includes:

[0128] Step S236, when the temperature in the reaction container reaches the second preset temperature, the reaction container is opened, and the absorption cover plate is placed on the opening of the reaction container.

[0129] For example, after the reaction time of the negative electrode sheet adhesive to be tested reaches the second preset time, the reaction container is naturally cooled. After the reaction container is naturally cooled to the second preset temperature (such as room temperature), the cover of the reaction container is opened, and an absorption cover plate moistened with sodium thiosulfate solution is used to cover the opening of the reaction container.

[0130] Step S238, when the covering time of the absorption cover plate reaches the first preset time, the reaction electrode in the reaction container is obtained.

[0131] After the absorption cover has been on for a first preset time (such as 5 to 10 minutes), the absorption cover is removed, and then the reaction electrode is taken out, thereby avoiding the harm of the residual liquid bromine to the human body and improving the safety of the detection.

[0132] In one embodiment, the step of controlling the cutting device to cut the reaction electrode piece to obtain the electrode piece cutting surface includes:

[0133] When the substrate and the coating area in the reaction electrode are separated, the substrate and the coating area are fixed by means of a conductive adhesive to obtain a fixed reaction electrode.

[0134] Since the coating area may be naturally separated from the substrate during the removal of the reaction electrode, in order to improve the reliability of the detection, when the reaction electrode is taken out, the separation of the substrate and the coating area in the reaction electrode is detected. If the substrate and the coating area in the reaction electrode are not separated, the removed reaction electrode is directly cut; if the substrate and the coating area in the reaction electrode are separated, the substrate and the coating area are fixed by conductive glue to obtain a fixed reaction electrode, thereby improving the reliability of the negative electrode adhesive distribution detection in the subsequent steps. It should be noted that the substrate can be copper foil.

[0135] In one example, the step of controlling the cutting device to cut the reaction electrode to obtain the electrode cutting surface includes:

[0136] Control the cutting equipment to cut the fixed reaction pole piece to obtain the pole piece cutting surface.

[0137] For example, the cross section of the coating area of ​​the fixed reaction electrode can be cut by an ion beam cutting device to obtain the electrode cutting surface; further, the electrode cutting surface after cutting can be scanned by a scanning device, and the adhesive distribution of the negative electrode to be tested can be accurately characterized based on the scanning results, thereby improving the accuracy of the test results.

[0138] It should be understood that although Figures 11 to 14 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figures 11 to 14 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0139] In one embodiment, a computer-readable storage medium is further provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the above-mentioned methods for detecting the distribution of the negative electrode adhesive of a battery are implemented.

[0140] For example, when the computer program is executed by the processor, the following steps of the battery negative electrode adhesive distribution detection method are implemented:

[0141] A preset content of reaction material is injected into the reaction container, and the negative electrode sheet to be tested is placed on the support surface of the support frame to isolate the reaction material from the negative electrode sheet to be tested; the temperature regulating device is controlled to regulate the temperature of the reaction material so that the reaction material reacts with the adhesive in the negative electrode sheet to be tested to obtain a reaction electrode sheet with a tracer element; the cutting device is controlled to cut the reaction electrode sheet to obtain a electrode sheet cutting surface; the electrode sheet cutting surface is scanned by a scanning device based on the tracer element to obtain scanning data, and the adhesive distribution result of the negative electrode sheet to be tested is determined based on the scanning data.

[0142] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned division operation methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0143] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery negative electrode adhesive distribution detection device, characterized in that: include: A reaction container, wherein a support frame and a reaction substance having a tracer element are arranged in the reaction container, a support surface of the support frame is arranged at a distance from the reaction substance, and the support surface is used to support the negative electrode sheet to be tested, so that the reaction substance is isolated from the negative electrode sheet to be tested; A temperature regulating device, wherein the temperature regulating device is used to regulate the temperature of the reaction substance so that the reaction substance reacts with the binder in the negative electrode sheet to be tested to obtain a reaction electrode sheet having the tracer element; A cutting device, wherein the cutting device is used to cut the reaction electrode to obtain a cutting surface of the electrode; A scanning device is used to scan the cut surface of the electrode sheet based on the tracer element to obtain scanning data, and determine the adhesive distribution result of the negative electrode sheet to be tested according to the scanning data.

2. The battery negative electrode adhesive distribution detection device according to claim 1, characterized in that: The reaction container comprises a containing cavity and a cover, wherein the containing cavity has an opening; The containing cavity is used to contain the reaction material and the supporting frame; the cover body is sealed at the opening.

3. The battery negative electrode adhesive distribution detection device according to claim 2, characterized in that: Also included is an absorbent cover; The absorption cover plate is used to cover the opening based on a first preset time after the cover body is opened and before the reaction electrode is taken out, so as to absorb the remaining reaction material in the accommodating cavity.

4. The battery negative electrode adhesive distribution detection device according to claim 1, characterized in that: Corresponding to a single negative electrode sheet to be tested, the content of the reaction material used per 1 square centimeter of the negative electrode sheet to be tested is 0.1 to 0.5 mL; And / or, corresponding to the plurality of negative electrode sheets to be tested, for each additional negative electrode sheet to be tested, the content of the reaction material used for each additional 1 square centimeter of the negative electrode sheet to be tested is 0.05 to 0.2 mL.

5. The battery negative electrode adhesive distribution detection device according to any one of claims 1 to 4, characterized in that: The reaction site is liquid bromine; the tracer element is bromine.

6. The battery negative electrode adhesive distribution detection device according to any one of claims 1 to 4, characterized in that: The cutting device is an ion beam cutting device.

7. A method for detecting the distribution of a negative electrode adhesive of a battery, characterized in that: Applied to the battery negative electrode adhesive distribution detection device according to any one of claims 1 to 11, the battery negative electrode adhesive distribution detection method comprises the following steps: Injecting a preset amount of reaction material into the reaction container, and placing the negative electrode sheet to be tested on the support surface of the support frame so that the reaction material is isolated from the negative electrode sheet to be tested; Controlling the temperature regulating device to regulate the temperature of the reaction substance, so that the reaction substance reacts with the binder in the negative electrode sheet to be tested to obtain a reaction electrode sheet with a tracer element; Controlling the cutting equipment to cut the reaction electrode to obtain a cutting surface of the electrode; The electrode sheet cut surface is scanned by a scanning device based on the tracer element to obtain scanning data, and the adhesive distribution result of the negative electrode sheet to be tested is determined according to the scanning data.

8. The method for detecting the distribution of the negative electrode adhesive of a battery according to claim 7, characterized in that: The step of injecting a preset amount of reaction material into the reaction container includes: Obtaining the electrode area of ​​the negative electrode to be tested; According to the electrode area, a mapping relationship between a preset area and a content is queried to obtain a preset content corresponding to the electrode area.

9. The method for detecting the distribution of the negative electrode adhesive of a battery according to claim 7, characterized in that: The step of scanning the electrode cut surface based on the tracer element by a scanning device to obtain scanning data comprises: Controlling the scanning device to perform surface scanning on the pole piece cutting surface based on the SEM mode to obtain a scanning image; The scanning device is controlled to perform a tracer element distribution scan on the pole piece cutting surface based on the EDS mode to obtain an element distribution map.

10. The method for detecting the distribution of the negative electrode adhesive of a battery according to claim 7, characterized in that: The step of controlling the temperature regulating device to regulate the temperature of the reaction material so that the reaction material reacts with the binder in the negative electrode sheet to be tested to obtain the reaction electrode sheet with the tracer element comprises: Controlling the temperature adjustment device to adjust the temperature of the reaction material based on the second preset time and the first preset temperature, so that the reaction material reacts with the binder in the negative electrode sheet to be tested; When the temperature in the reaction container reaches a second preset temperature, the reaction electrode in the reaction container is obtained.

11. The method for detecting the distribution of the negative electrode adhesive of a battery according to claim 10, characterized in that: When the temperature in the reaction container reaches a second preset temperature, the step of obtaining the reaction electrode in the reaction container includes: When the temperature in the reaction container reaches a second preset temperature, the reaction container is opened, and an absorption cover plate is placed on the opening of the reaction container; When the covering time of the absorption cover plate reaches a first preset time, the reaction electrode in the reaction container is obtained.

12. The method for detecting the distribution of the negative electrode adhesive of a battery according to claim 7, characterized in that: The step of controlling the cutting device to cut the reaction electrode to obtain the electrode cutting surface comprises: When the substrate and the coating area in the reaction electrode are separated, the substrate and the coating area are fixed by a conductive adhesive to obtain a fixed reaction electrode; The step of controlling the cutting device to cut the reaction electrode to obtain the electrode cutting surface comprises: The control cutting device cuts the fixed rear reaction pole piece to obtain a pole piece cutting surface.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the battery negative electrode adhesive distribution detection method according to any one of claims 7 to 12 are implemented.

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