Failure cell pretreatment device and battery production line

Abstract

The utility model relates to the technical field of battery production, in particular to a failed battery cell pretreatment device and a battery production line. The failure cell pretreatment device comprises a clamp assembly and a power supply assembly, the clamp assembly comprises a first pressing plate and a second pressing plate, an accommodating space for placing a failure cell is arranged between the first pressing plate and the second pressing plate, and the distance between the first pressing plate and the second pressing plate is adjustable; and the power supply assembly is electrically connected with a failure battery cell which is placed in the accommodating space and is subjected to the insulation test, and the power supply assembly is configured to electrify the failure battery cell, so that a failure point of the failure battery cell is ablated and increased. According to the failure battery cell pretreatment device, the clamp assembly and the power supply assembly are arranged, and the failure battery cell is electrified through the power supply assembly, so that the failure point of the failure battery cell is ablated and increased, the failure point of the failure battery cell is conveniently and accurately identified, the disassembly difficulty of the failure battery cell can be reduced, and the disassembly efficiency of the failure battery cell is improved. And subsequent disassembly of the failed battery cell is facilitated.

Description

Technical Field

[0001] This application relates to the field of battery production technology, and in particular to a pretreatment device for failed battery cells and a battery production line. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] With the increasing maturity of new energy technologies, new energy vehicles and other electrical equipment are gradually entering the public eye. The core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the entire vehicle.

[0004] During the battery manufacturing process, high-voltage testing is required to assess the insulation performance of failed battery cells, accurately identify separator defects and foreign matter, and ensure the battery device is free from short-circuit risks. After the failed cells have been tested, failure analysis is needed to pinpoint their failure points. However, this analysis often fails to accurately identify the specific failure points; therefore, a pre-treatment device is required to process the tested failed cells. Utility Model Content

[0005] In view of the above problems, this application provides a pretreatment device for failed battery cells and a battery production line, which solves the problem that the failure points of failed battery cells cannot be accurately identified in the failure analysis process of the prior art.

[0006] A first aspect of the embodiments of this application provides a failed battery cell pretreatment device, which includes a clamping assembly and a power supply assembly. The clamping assembly includes a first pressure plate and a second pressure plate, and a receiving space for placing the failed battery cell is provided between the first pressure plate and the second pressure plate. The distance between the first pressure plate and the second pressure plate is adjustable. The power supply assembly is electrically connected to the failed battery cell placed in the receiving space and after insulation testing. The power supply assembly is configured to energize the failed battery cell so that the failure point of the failed battery cell is ablated and enlarged.

[0007] The failed battery cell pretreatment device of this application includes a clamp assembly and a power supply assembly. The clamp assembly includes a first pressure plate and a second pressure plate, with a space for placing the failed battery cell between the first and second pressure plates. The distance between the first and second pressure plates is adjustable. The power supply assembly is configured to energize the failed battery cell, thereby increasing the ablation value of the failure point. This allows the failed battery cell after insulation testing to be fixed in the space between the first and second pressure plates. The power supply assembly heats the failed battery cell after insulation testing, further increasing the ablation value of the failure point, facilitating accurate identification of the failure point and reducing the difficulty of disassembling the failed battery cell, thus simplifying subsequent disassembly.

[0008] In some embodiments of this application, the failed battery cell pretreatment device further includes a temperature measuring component, which includes a temperature sensor for detecting the surface temperature and / or internal temperature of the failed battery cell.

[0009] The embodiments of this application include a temperature measuring component, which includes a temperature sensor. The temperature sensor is used to detect the surface temperature and / or internal temperature of the failed battery cell. The temperature change of the failed battery cell can be recorded based on the surface temperature and / or internal temperature of the failed battery cell, thereby facilitating the identification of the specific location of the failure point on the failed battery cell and facilitating the subsequent disassembly of the failed battery cell.

[0010] In some embodiments of this application, the temperature sensor includes an infrared sensor disposed within the accommodating space for detecting the surface temperature of the failed battery cell.

[0011] The embodiments of this application include an infrared sensor located within an accommodating space to detect the surface temperature of a failed battery cell. This allows for the detection of the surface temperature of the failed battery cell, facilitating the identification of the specific location of the failure point on the surface of the failed battery cell.

[0012] In some embodiments of this application, the temperature sensor includes a thermistor, and the thermistor is provided on the surface and / or inside the failed battery cell.

[0013] The embodiments of this application provide a thermistor on the surface and / or inside the failed battery cell, which enables temperature detection of the surface or inside the failed battery cell, thereby facilitating the identification of the specific location of the failure point on the surface or inside the failed battery cell.

[0014] In some embodiments of this application, the failed battery cell pretreatment device further includes a pressure application component, which is connected to a first pressure plate and drives the first pressure plate to move closer to or away from the second pressure plate.

[0015] The embodiments of this application include an application component, wherein the pressure application component is connected to the first pressure plate and drives the first pressure plate to move closer to or away from the second pressure plate. This allows the first pressure plate to move closer to the second pressure plate, thereby clamping the failed battery cell. This facilitates the conduction of the cathode and anode of the failed battery cell at the failure location, improving the success rate of stable current output.

[0016] In some embodiments of this application, the pressure application assembly includes a pressure application component and a pressure adjustment component, wherein the pressure application component is connected to a first pressure plate, and the pressure adjustment component is connected to the pressure application component.

[0017] The embodiments of this application include a pressure application component and a pressure adjustment component. The pressure application component is connected to the first pressure plate, and the pressure adjustment component is connected to the pressure application component. The pressure applied to the failed battery cell by the pressure application component can be controlled by the pressure adjustment component, thereby making the failed battery cell more compact.

[0018] In some embodiments of this application, the clamp assembly further includes a mounting base, a second pressure plate disposed on the mounting base, and a first pressure plate disposed on the side of the second pressure plate opposite to the mounting base.

[0019] The embodiments of this application provide a mounting base, wherein a second pressure plate is disposed on the mounting base and a first pressure plate is disposed on the side of the second pressure plate away from the mounting base. The second pressure plate can be installed through the mounting base, which facilitates the fixing of the second pressure plate and enhances the stability of the second pressure plate after it is fixed.

[0020] In some embodiments of this application, at least one of the surfaces of the first pressure plate facing the second pressure plate and the surfaces of the second pressure plate facing the first pressure plate is provided with a cushioning pad.

[0021] In the embodiments of this application, a buffer pad is provided on at least one of the surfaces of the first pressure plate facing the second pressure plate and the surfaces of the second pressure plate facing the first pressure plate, so that the buffer pad can contact the failed battery cell and protect the failed battery cell.

[0022] In some embodiments of this application, the number of buffer pads is two, including a first buffer pad and a second buffer pad, wherein the first buffer pad is provided in the central area of ​​the first pressure plate and the second buffer pad is provided in the central area of ​​the second pressure plate.

[0023] The embodiments of this application set the number of buffer pads to two, wherein the two buffer pads include a first buffer pad and a second buffer pad. The first buffer pad is provided in the central area of ​​the first pressure plate and the second buffer pad is provided in the central area of ​​the second pressure plate. This allows the failed battery cell to be placed in the accommodating space and come into contact with the first buffer pad and the second buffer pad respectively, thereby forming protection for the failed battery cell.

[0024] In some embodiments of this application, the orthographic projection of the failed battery cell toward the first buffer pad is located on the first buffer pad, and the orthographic projection of the failed battery cell toward the second buffer pad is located on the second buffer pad.

[0025] The embodiments of this application, by placing the orthographic projection of the failed battery cell toward the first buffer pad on the first buffer pad and the orthographic projection of the failed battery cell toward the second buffer pad on the second buffer pad, ensure that after the failed battery cell is placed in the receiving space, it only contacts the first and second buffer pads, thus protecting the failed battery cell. In addition, when the pressure-applying component applies pressure to the failed battery cell, the pressure can be applied evenly to the failed battery cell, reducing the probability of the failed battery cell tilting or rotating.

[0026] In some embodiments of this application, an infrared sensor is disposed on the surface of the second pressure plate facing the first pressure plate, and the infrared sensor is located on the circumferential outer side of the second buffer pad.

[0027] In the embodiments of this application, by placing an infrared sensor on the surface of the second pressure plate facing the first pressure plate, and with the infrared sensor located on the circumferential outer side of the second buffer pad, the surface temperature of the failed battery cell can be detected by the infrared sensor.

[0028] In some embodiments of this application, the power supply assembly includes a power supply component and an electrical connector. The electrical connector is provided on the second buffer pad and / or the second pressure plate, and the power supply component is electrically connected to the failed battery cell through the electrical connector.

[0029] The embodiments of this application provide a power supply component and an electrical connector. The second buffer pad and / or the second pressure plate are provided with an electrical connector. The power supply component is electrically connected to the failed battery cell through the electrical connector. Thus, the electrical connection between the power supply component and the failed battery cell can be achieved through the electrical connector, which facilitates the electrical connection between the power supply component and the failed battery cell.

[0030] A second aspect of the embodiments of this application provides a battery production line, including the failed cell pretreatment device mentioned in the above embodiments.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of a failed battery cell pretreatment device in use, provided for some embodiments of this application;

[0034] Figure 2 for Figure 1 The diagram shows a partially enlarged structural schematic of the failed battery cell pretreatment device at point A.

[0035] Figure 3 for Figure 1 Another schematic diagram of the failed battery cell pretreatment device shown in the diagram in use;

[0036] Figure 4 for Figure 3 The diagram shows a partially enlarged view of the failed battery cell pretreatment device at point B.

[0037] The attached figures are labeled as follows:

[0038] 100. Failed battery cell pretreatment device;

[0039] 10. Fixture assembly; 11. First pressure plate; 12. Second pressure plate; 13. Accommodation space; 14. Mounting base;

[0040] 20. Power supply assembly; 21. Power supply component; 22. Electrical connector; 23. Wire;

[0041] 30. Temperature measurement component; 31. Temperature sensor; 311. Infrared sensor; 312. Thermistor; 32. Signal processing module;

[0042] 40. Pressure application component; 41. Pressure application part; 42. Pressure regulating part;

[0043] 50. Cushioning pad; 51. First cushioning pad; 52. Second cushioning pad;

[0044] 200. Failed battery cells;

[0045] XX, the length direction of the failed battery cell pretreatment device;

[0046] YY, the width direction of the failed battery cell pretreatment device;

[0047] ZZ, the height direction of the failed battery cell pretreatment device. Detailed Implementation

[0048] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0056] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0057] The battery devices described in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. Such electrical equipment can be composed of battery cells and battery devices as described in this application.

[0058] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0059] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all batteries including housings and electrical equipment using batteries.

[0060] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0061] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0062] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0063] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0064] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0065] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0066] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0067] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0068] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0069] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. Current collectors without the positive active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. Current collectors without the negative active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0070] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0071] During the battery manufacturing process, high-voltage testing is required to assess the insulation performance of failed battery cells, accurately identify separator defects and foreign matter, and ensure the battery device is free from short-circuit risks. After the failed cells have been tested, failure analysis is needed to pinpoint their failure points. However, this analysis often fails to accurately identify the specific failure points; therefore, a pre-treatment device is required to process the tested failed cells.

[0072] To address this problem, embodiments of this application propose a failed battery cell pretreatment device. The device includes a clamp assembly and a power supply assembly. The clamp assembly includes a first pressure plate and a second pressure plate, with a space for placing the failed battery cell between the first and second pressure plates. The distance between the first and second pressure plates is adjustable. The power supply assembly is electrically connected to the failed battery cell after insulation testing to expand the size of the failure point of the failed battery cell by heating. The failed battery cell pretreatment device of this application includes a clamp assembly and a power supply assembly. The clamp assembly includes a first pressure plate and a second pressure plate, with a space for placing the failed battery cell between the first and second pressure plates. The distance between the first and second pressure plates is adjustable. The power supply assembly is electrically connected to the failed battery cell placed in the space after insulation testing. The power supply assembly is configured to energize the failed battery cell to ablate and enlarge the failure point of the failed battery cell. This allows the failed battery cell after insulation testing to be fixed in the space between the first and second pressure plates. The power supply assembly heats the failed battery cell after insulation testing, further ablates and enlarges the failure point of the failed battery cell, facilitating accurate identification of the failure point of the failed battery cell, reducing the difficulty of disassembling the failed battery cell, and facilitating subsequent disassembly.

[0073] The failed battery cell pretreatment device in the embodiments of this application can be used in the production process of battery devices, or in other scenarios where failed battery cells need to be pretreated.

[0074] The structures in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0075] The first aspect of the embodiments of this application provides a failed battery cell pretreatment device 100, such as... Figures 1 to 4 As shown, the failed battery cell pretreatment device 100 includes a clamp assembly 10 and a power supply assembly 20. The clamp assembly 10 includes a first pressure plate 11 and a second pressure plate 12. A receiving space 13 for placing the failed battery cell 200 is provided between the first pressure plate 11 and the second pressure plate 12. The distance between the first pressure plate 11 and the second pressure plate 12 is adjustable. The power supply assembly 20 is electrically connected to the failed battery cell 200 placed in the receiving space 13 and after insulation testing. The power supply assembly 20 is configured to energize the failed battery cell 200 so that the failure point of the failed battery cell 200 is ablated and enlarged.

[0076] It should be noted that insulation testing refers to hi-pot testing, which uses high voltage to detect the insulation performance of the battery cell. It can accurately identify defects and foreign objects in the cell's separator, reduce the risk of short circuits in the battery device, and is a key quality inspection link to improve the safety of the battery device. Among them, the failed cell 200 refers to the unqualified cell obtained after performing insulation testing.

[0077] The clamping assembly 10 here is a component capable of clamping the failed battery cell 200. It can clamp the failed battery cell 200 by adjusting the distance between the first pressure plate 11 and the second pressure plate 12. The power supply assembly 20 here refers to a component that can be electrically connected to the failed battery cell 200 and heat it. This allows for localized heat generation in the failed battery cell 200, raising its temperature and thus ablating the failure point and enlarging its size.

[0078] The failed battery cell pretreatment device 100 of this application embodiment is provided with a clamp assembly 10 and a power supply assembly 20. The clamp assembly 10 includes a first pressure plate 11 and a second pressure plate 12. A receiving space 13 for placing the failed battery cell 200 is provided between the first pressure plate 11 and the second pressure plate 12, and the distance between the first pressure plate 11 and the second pressure plate 12 is adjustable. The power supply assembly 20 is configured to energize the failed battery cell 200 so that the failure point of the failed battery cell 200 is ablated and enlarged. This allows the failed battery cell 200 after insulation testing to be fixed in the receiving space 13 between the first pressure plate 11 and the second pressure plate 12. The power supply assembly 20 heats the failed battery cell 200 after insulation testing to enlarge the size of the failure point of the failed battery cell 200, which facilitates accurate identification of the failure point of the failed battery cell 200, reduces the difficulty of disassembling the failed battery cell 200, and facilitates subsequent disassembly of the failed battery cell 200.

[0079] It should be noted that the power supply component 20 here can be a direct current application device, and both the voltage and current of the power supply component 20 are adjustable, enabling stable current output. It is important to note that when setting the output voltage and current of the power supply component 20, the probability of secondary breakdown of the failed battery cell 200 needs to be reduced. Therefore, the output voltage can be less than or equal to 50 volts, such as 40 volts, 35 volts, or 30 volts, the output current range is between 0.1 amps and 0.5 amps, and the ablation time is between 2 seconds and 5 seconds. This achieves ablation of the failure point and reduces the probability of secondary breakdown of the failed battery cell 200, thus lowering the likelihood of severe damage to the failed battery cell 200.

[0080] In some embodiments of this application, such as Figure 2 and Figure 4 As shown, the failed battery cell pretreatment device 100 also includes a temperature measuring component 30, which includes a temperature sensor 31. The temperature sensor 31 is used to detect the surface temperature and / or internal temperature of the failed battery cell 200.

[0081] The temperature sensor 31 here refers to a sensor that can sense temperature and convert it into a usable output signal. The temperature sensor 31 can measure temperature in both contact and non-contact ways, and can detect the surface temperature and / or internal temperature of the failed battery cell 200.

[0082] Specifically, the temperature sensor 31 here can be a thermocouple, a thermistor 312, a platinum resistance thermometer, or an infrared sensor 311, all of which can detect the temperature of the failed battery cell 200.

[0083] The embodiments of this application include a temperature measuring component 30, which includes a temperature sensor 31. The temperature sensor 31 is used to detect the surface temperature and / or internal temperature of the failed battery cell 200. The temperature change of the failed battery cell 200 can be recorded based on the surface temperature and / or internal temperature of the failed battery cell 200, thereby facilitating the identification of the specific location of the failure point on the failed battery cell 200 and facilitating the subsequent disassembly of the failed battery cell 200.

[0084] It should be added that the temperature sensing component 30 here can record the temperature changes of the failed battery cell 200. When the temperature at a certain location of the failed battery cell 200 rises sharply, it indicates that that location of the failed battery cell 200 has been ablated, signifying that the pretreatment has achieved the expected results. After the failed battery cell pretreatment device 100 has finished processing the failed battery cell 200, it can be more convenient to disassemble it, shortening the disassembly time.

[0085] Optionally, such as Figure 2 As shown, the temperature sensor 31 includes an infrared sensor 311, which is disposed in the accommodating space 13 and is used to detect the surface temperature of the failed battery cell 200.

[0086] The infrared sensor 311 here uses a non-contact temperature measurement method. There can be at least one infrared sensor 311. Two infrared sensors 311 are respectively positioned on two adjacent sides of the failed battery cell 200. That is, one infrared sensor 311 is located on the right or left side of the failed battery cell 200 along the length direction of the failed battery cell pretreatment device 100, and the other infrared sensor 311 is located on the front or rear side of the failed battery cell pretreatment device 100 along the width direction. The length direction of the failed battery cell pretreatment device 100 is... Figure 1 In the XX direction, the width direction of the failed cell pretreatment device 100 is... Figure 1 In the YY direction, the height direction of the failed cell pretreatment device 100 is... Figure 1 In the ZZ direction, the first pressure plate 11 and the second pressure plate 12 are spaced apart along the ZZ direction.

[0087] In this embodiment of the application, an infrared sensor 311 is provided. The infrared sensor 311 is located in the accommodating space 13 and is used to detect the surface temperature of the failed battery cell 200. The surface temperature of the failed battery cell 200 can be detected by the infrared sensor 311, thereby realizing the temperature detection of the surface of the failed battery cell 200 and making it convenient to identify the specific location of the failure point on the surface of the failed battery cell 200.

[0088] Optionally, such as Figure 4 As shown, the temperature sensor 31 includes a thermistor 312, and the thermistor 312 is provided on the surface and / or inside the failed battery cell 200.

[0089] The thermistor 312 here is a semiconductor sensor device whose resistance changes significantly with temperature. The resistance exhibits an exponential response to temperature changes, with the positive temperature coefficient resistance increasing as temperature rises and the negative temperature coefficient resistance increasing in the opposite direction. The thermistor 312 can be placed inside the failed battery cell 200 to detect the temperature inside the cell. Alternatively, it can be placed on the surface of the failed battery cell 200 to detect the surface temperature.

[0090] The embodiments of this application provide a thermistor 312 on the surface and / or inside the failed battery cell 200, which can be used to detect the temperature on the surface or inside of the failed battery cell 200, thereby facilitating the identification of the specific location of the failure point on the surface or inside the failed battery cell 200.

[0091] It should be noted that the temperature sensor 31 here can include both thermistor 312 and infrared sensor 311, which can reduce the failure of a single temperature detection method and enable the temperature sensor 31 to still perform the temperature detection function after one detection method fails.

[0092] Optionally, such as Figure 3 and Figure 4 As shown, the temperature measuring component 30 also includes a signal processing module 32, which is electrically connected to the temperature sensor 31 and can process the signal collected by the temperature sensor 31 to obtain specific temperature data.

[0093] Optionally, the temperature measuring component 30 also includes a temperature display module, which can be a display screen electrically connected to the signal processing module 32, enabling the operator to easily observe the specific temperature value.

[0094] Optionally, such as Figure 1 and Figure 3As shown, the failed battery cell pretreatment device 100 also includes a pressure application component 40, which is connected to the first pressure plate 11 and drives the first pressure plate 11 to move closer to or away from the second pressure plate 12.

[0095] Specifically, the pressure application component 40 can cause the first pressure plate 11 to move upward along the ZZ direction, away from the second pressure plate 12, or it can cause the first pressure plate 11 to move downward along the ZZ direction, closer to the second pressure plate 12. The clamping of the failed battery cell 200 is achieved through the synchronous action of the first pressure plate 11 and the second pressure plate 12.

[0096] The embodiments of this application include an application component, wherein the pressure application component 40 is connected to the first pressure plate 11 and drives the first pressure plate 11 to move closer to or away from the second pressure plate 12. The pressure application component 40 can cause the first pressure plate 11 to move closer to the second pressure plate 12, thereby clamping the failed battery cell 200. This is beneficial for the cathode and anode of the failed battery cell 200 to conduct at the failed position, thereby improving the success rate of stable current output.

[0097] Optionally, such as Figure 1 and Figure 3 As shown, the pressure assembly includes a pressure applying component 41 and a pressure adjusting component 42. The pressure applying component 41 is connected to the first pressure plate 11, and the pressure adjusting component 42 is connected to the pressure applying component 41.

[0098] The pressure applying component 41 can be a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder, etc., and the pressure regulating component 42 can be a pressure regulating valve. The pressure regulating valve is located on the air supply pipe or liquid supply pipe of the pressure applying component 41. The pressure regulating valve is used to regulate the amount of gas or liquid supplied into the air supply pipe or liquid supply pipe, thereby adjusting the pressure applied to the failed battery cell 200.

[0099] The embodiments of this application provide a pressure application component 41 and a pressure adjustment component 42. The pressure application component 41 is connected to the first pressure plate 11, and the pressure adjustment component 42 is connected to the pressure application component 41. The pressure applied to the failed battery cell 200 by the pressure application component 41 can be controlled by the pressure adjustment component 42, thereby making the failed battery cell 200 more compact.

[0100] Optionally, the clamp assembly 10 further includes a mounting base 14, a second pressure plate 12 disposed on the mounting base 14, and a first pressure plate 11 disposed on the side of the second pressure plate 12 opposite to the mounting base 14.

[0101] The mounting base 14 here can realize the installation of the second pressure plate 12. In use, the mounting base 14 can be placed directly on the work platform to fix the failed battery cell pretreatment device 100.

[0102] In the embodiments of this application, a mounting base 14 is provided, wherein a second pressure plate 12 is provided on the mounting base 14, and a first pressure plate 11 is provided on the side of the second pressure plate 12 away from the mounting base 14. The second pressure plate 12 can be installed through the mounting base 14, which facilitates the fixing of the second pressure plate 12 and enhances the stability of the second pressure plate 12 after fixing.

[0103] Optionally, such as Figure 1 and Figure 2 As shown, at least one of the surfaces of the first pressure plate 11 facing the second pressure plate 12 and the second pressure plate 12 facing the first pressure plate 11 is provided with a cushioning pad 50.

[0104] Specifically, the surface of the first pressure plate 11 facing the second pressure plate 12 is the lower surface of the first pressure plate 11, and the surface of the second pressure plate 12 facing the first pressure plate 11 is the upper surface of the second pressure plate 12. At least one of the lower surface of the first pressure plate 11 and the upper surface of the second pressure plate 12 is provided with a cushioning pad 50. The cushioning pad 50 can be made of silicone or rubber, and its shape can be a rectangular plate structure or a circular plate structure.

[0105] In the embodiments of this application, a buffer pad 50 is provided on at least one of the surfaces of the first pressure plate 11 facing the second pressure plate 12 and the second pressure plate 12 facing the first pressure plate 11, so that the buffer pad 50 can contact the failed battery cell 200 and protect the failed battery cell 200.

[0106] Optionally, such as Figure 1 As shown, there are two buffer pads 50. The two buffer pads 50 include a first buffer pad 51 and a second buffer pad 52. The first buffer pad 51 is provided in the central area of ​​the first pressure plate 11, and the second buffer pad 52 is provided in the central area of ​​the second pressure plate 12.

[0107] It should be noted that both the first pressure plate 11 and the second pressure plate 12 can be rectangular plate structures. The first buffer pad 51 being located in the central region of the first pressure plate 11 means that the first buffer pad 51 is located at the center of the first pressure plate 11 along its length and at its width. The first buffer pad 51 can be adhered to the lower surface of the first pressure plate 11. Correspondingly, the second buffer pad 52 being located in the central region of the second pressure plate 12 means that the second buffer pad 52 is located at the center of the second pressure plate 12 along its length and at its width. The second buffer pad 52 can be adhered to the upper surface of the second pressure plate 12.

[0108] In this embodiment of the application, by setting the number of buffer pads 50 to two, wherein the two buffer pads 50 include a first buffer pad 51 and a second buffer pad 52, the first buffer pad 51 is provided in the central area of ​​the first pressure plate 11 and the second buffer pad 52 is provided in the central area of ​​the second pressure plate 12, so that after the failed battery cell 200 is placed in the accommodating space 13, it will contact the first buffer pad 51 and the second buffer pad 52 respectively, thereby forming protection for the failed battery cell 200.

[0109] Optionally, such as Figure 2 As shown, the orthographic projection of the failed battery cell 200 toward the first buffer pad 51 is located on the first buffer pad 51, and the orthographic projection of the failed battery cell 200 toward the second buffer pad 52 is located on the second buffer pad 52.

[0110] The area of ​​the first buffer pad 51 is greater than or equal to the area of ​​the upper surface of the failed battery cell 200, so that the first buffer pad 51 can completely cover the upper surface of the failed battery cell 200. Correspondingly, the area of ​​the second buffer pad 52 is greater than or equal to the area of ​​the lower surface of the failed battery cell 200, so that the second buffer pad 52 can completely cover the lower surface of the failed battery cell 200. After the failed battery cell 200 is placed in the receiving space 13, the upper surface of the failed battery cell 200 can be fully in contact with the first buffer pad 51, and the lower surface of the failed battery cell 200 can be fully in contact with the second buffer pad 52, thereby forming protection for the failed battery cell 200.

[0111] In this embodiment, by placing the orthographic projection of the failed battery cell 200 toward the first buffer pad 51 onto the first buffer pad 51, and the orthographic projection of the failed battery cell 200 toward the second buffer pad 52 onto the second buffer pad 52, the failed battery cell 200, after being placed in the receiving space 13, only contacts the first buffer pad 51 and the second buffer pad 52, and does not directly contact the first pressure plate 11 and the second pressure plate 12, thereby protecting the failed battery cell 200. Furthermore, when the pressure-applying component 40 applies pressure to the failed battery cell 200, the pressure is evenly distributed across the failed battery cell 200, reducing the probability of the failed battery cell 200 tilting or rotating.

[0112] Optionally, such as Figure 3 As shown, the infrared sensor 311 is disposed on the surface of the second pressure plate 12 facing the first pressure plate 11, and the infrared sensor 311 is located on the circumferential outer side of the second buffer pad 52.

[0113] Considering that the first pressure plate 11 needs to move while the second pressure plate 12 is fixed, the infrared sensor 311 is placed on the second pressure plate 12 to ensure its stability. In addition, to reduce the impact of the infrared sensor 311 on the failed battery cell 200, the infrared sensor 311 can be placed on the outer circumferential side of the second buffer pad 52 so that the infrared sensor 311 will not directly contact the failed battery cell 200.

[0114] In the embodiments of this application, by placing an infrared sensor 311 on the surface of the second pressure plate 12 facing the first pressure plate 11, and with the infrared sensor 311 located on the circumferential outer side of the second buffer pad 52, the surface temperature of the failed battery cell 200 can be detected by the infrared sensor 311.

[0115] Optionally, the power supply assembly 20 includes a power supply component 21 and an electrical connector 22. The electrical connector 22 is provided on the second buffer pad 52 and / or the second pressure plate 12. The power supply component 21 is electrically connected to the failed battery cell 200 through the electrical connector 22.

[0116] It should be noted that the power supply device 21 here can be a DC current application device. Since the anode and cathode of the failed cell 200's diaphragm are connected at the failure location, forming an electronic short circuit, when DC current is applied after voltage is applied to the failed cell 200, electrons directly pass through the holes to form a short circuit path. The resistance of the short circuit path is low, and the current is large, resulting in localized heat generation and a rapid temperature increase, thereby ablating the failure location of the diaphragm. Typically, the size of the failure point in the failed cell 200 is less than 100 micrometers. After processing by the failed cell pretreatment device 100, the size of the failure point can be expanded to about 300 micrometers, making it easier to identify with the naked eye. This allows operators to clearly observe the location of the failure point, facilitating the disassembly of the failed cell 200 and improving the accuracy and precision of disassembly.

[0117] Additionally, the electrical connector 22 here can be removed. Figure 1 In this configuration, the power supply unit 21 can be directly electrically connected to the failed battery cell 200. Figure 3 In the middle, the electrical connector 22 is set on the second pressure plate 12, and the power supply component 21 can be connected to the electrical connector 22. The electrical connector 22 is electrically connected to the failed battery cell 200.

[0118] The embodiments of this application provide a power supply component 21 and an electrical connector 22. The second buffer pad 52 and / or the second pressure plate 12 are provided with the electrical connector 22. The power supply component 21 is electrically connected to the failed battery cell 200 through the electrical connector 22. Thus, the electrical connection between the power supply component 21 and the failed battery cell 200 can be achieved through the electrical connector 22, which facilitates the electrical connection between the power supply component 21 and the failed battery cell 200.

[0119] Optionally, the power supply assembly 20 also includes a wire 23, wherein the power supply component 21 and the electrical connector 22 are connected by the wire 23, which may be an electric wire or other conductive component.

[0120] It should be noted that main material particles or metallic foreign objects may become embedded in the separator. The failed cell pretreatment device 100 can ablate discernible holes around the failure point of the failed cell 200. The size of the holes will be larger than the original size of the failure point, and the embedded foreign objects will remain in the holes. In addition, the failed cell pretreatment device 100 can also ablate the edges of the separator of the failed cell 200, making it easier to observe the overlap between the cathode and anode edges and pinpoint the overlap location.

[0121] A second aspect of the embodiments of this application provides a battery production line, including the failed cell pretreatment device 100 mentioned in the above embodiments.

[0122] The battery production line here also includes winding equipment, welding equipment and other equipment used in the battery production process, which will not be listed here.

[0123] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0124] A first aspect of this application provides a failed battery cell pretreatment apparatus 100, comprising a clamping assembly 10 and a power supply assembly 20. The clamping assembly 10 includes a first pressure plate 11 and a second pressure plate 12, with a receiving space 13 between the first pressure plate 11 and the second pressure plate 12 for placing a failed battery cell 200. The distance between the first pressure plate 11 and the second pressure plate 12 is adjustable. The power supply assembly 20 is electrically connected to the failed battery cell 200 placed in the receiving space 13 and after insulation testing. The power supply assembly 20 is configured to energize the failed battery cell 200 to ablate and enlarge the failure points of the failed battery cell 200. Further, the clamping assembly 10 also includes a temperature measuring assembly 30, which includes a temperature sensor 31 for detecting the surface temperature and / or internal temperature of the failed battery cell 200. Further, the temperature sensor 31 includes an infrared sensor 311, which is disposed within the accommodating space 13 and is used to detect the surface temperature of the failed battery cell 200. Further, the temperature sensor 31 includes a thermistor 312, which is provided on the surface and / or inside the failed battery cell 200. Further, it also includes a pressure application assembly 40, which is connected to the first pressure plate 11 and drives the first pressure plate 11 to move closer to or away from the second pressure plate 12. Further, the pressure application assembly 40 includes a pressure applying component 41 and a pressure adjusting component 42, whereby the pressure applying component 41 is connected to the first pressure plate 11 and the pressure adjusting component 42 is connected to the pressure applying component 41. Further, the clamp assembly 10 also includes a mounting base 14, where the second pressure plate 12 is disposed on the mounting base 14, and the first pressure plate 11 is disposed on the side of the second pressure plate 12 opposite to the mounting base 14. Further, at least one of the surfaces of the first pressure plate 11 facing the second pressure plate 12 and the second pressure plate 12 facing the first pressure plate 11 is provided with a buffer pad 50. Further, there are two buffer pads 50, including a first buffer pad 51 and a second buffer pad 52, wherein the first buffer pad 51 is located in the central region of the first pressure plate 11, and the second buffer pad 52 is located in the central region of the second pressure plate 12. Further, the orthographic projection of the failed battery cell 200 toward the first buffer pad 51 is located on the first buffer pad 51, and the orthographic projection of the failed battery cell 200 toward the second buffer pad 52 is located on the second buffer pad 52. Further, an infrared sensor 311 is disposed on the surface of the second pressure plate 12 facing the first pressure plate 11, and the infrared sensor 311 is located circumferentially outside the second buffer pad 52. Furthermore, the power supply assembly 20 includes a power supply component 21 and an electrical connector 22. The second buffer pad 52 and / or the second pressure plate 12 are provided with the electrical connector 22, and the power supply component 21 is electrically connected to the failed battery cell 200 through the electrical connector 22.

[0125] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pretreatment device for failed battery cells, characterized in that, include: A clamping assembly, comprising a first pressure plate and a second pressure plate, wherein a space for placing a failed battery cell is provided between the first pressure plate and the second pressure plate, and the distance between the first pressure plate and the second pressure plate is adjustable; as well as A power supply assembly is electrically connected to the failed battery cell, which is placed within the accommodating space and has undergone an insulation test. The power supply assembly is configured to energize the failed battery cell, thereby increasing the ablation rate of the failure point of the failed battery cell.

2. The failed battery cell pretreatment device as described in claim 1, characterized in that, Also includes: A temperature measuring component, comprising a temperature sensor, wherein the temperature sensor is used to detect the surface temperature of the failed battery cell and / or the internal temperature of the failed battery cell.

3. The failed battery cell pretreatment device as described in claim 2, characterized in that, The temperature sensor includes an infrared sensor, which is located within the accommodating space and is used to detect the surface temperature of the failed battery cell.

4. The failed battery cell pretreatment device as described in claim 2, characterized in that, The temperature sensor includes a thermistor, which is provided on the surface and / or inside the failed battery cell.

5. The failed battery cell pretreatment device as described in claim 3, characterized in that, It also includes a pressure-applying component, which is connected to the first pressure plate and drives the first pressure plate to move closer to or away from the second pressure plate.

6. The failed battery cell pretreatment device as described in claim 5, characterized in that, The pressure application assembly includes a pressure application component and a pressure adjustment component. The pressure application component is connected to the first pressure plate, and the pressure adjustment component is connected to the pressure application component.

7. The failed battery cell pretreatment device as described in claim 6, characterized in that, The clamp assembly further includes a mounting base, the second pressure plate is disposed on the mounting base, and the first pressure plate is disposed on the side of the second pressure plate opposite to the mounting base.

8. The failed battery cell pretreatment device as described in claim 7, characterized in that, At least one of the surfaces of the first pressure plate facing the second pressure plate and the second pressure plate facing the first pressure plate is provided with a cushioning pad.

9. The failed battery cell pretreatment device as described in claim 8, characterized in that, The number of buffer pads is two, and the two buffer pads include a first buffer pad and a second buffer pad. The first buffer pad is provided in the central area of ​​the first pressure plate, and the second buffer pad is provided in the central area of ​​the second pressure plate.

10. The failed battery cell pretreatment device as described in claim 9, characterized in that, The orthographic projection of the failed battery cell toward the first buffer pad is located on the first buffer pad, and the orthographic projection of the failed battery cell toward the second buffer pad is located on the second buffer pad.

11. The failed battery cell pretreatment device as described in claim 9, characterized in that, The infrared sensor is disposed on the surface of the second pressure plate facing the first pressure plate, and the infrared sensor is located on the circumferential outer side of the second buffer pad.

12. The failed battery cell pretreatment apparatus according to any one of claims 9 to 11, characterized in that, The power supply assembly includes a power supply component and an electrical connector. The electrical connector is provided on the second buffer pad and / or the second pressure plate. The power supply component is electrically connected to the failed battery cell through the electrical connector.

13. A battery production line, characterized in that, Includes the failed cell pretreatment device as described in any one of claims 1 to 12.

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