Battery production equipment and battery production system

Abstract

The utility model discloses battery production equipment and a battery production system. The battery production equipment comprises an equipment box body and a tray assembly, the equipment box body is provided with an accommodating cavity for providing a specific temperature environment; the tray assembly is arranged in the containing cavity and comprises a tray and a clamping assembly, the clamping assembly is arranged in the tray and comprises at least two vertically-arranged heat transfer clamping plates which are arranged side by side, and a clamping space is formed between every two adjacent heat transfer clamping plates; a convection channel is arranged in the heat transfer clamping plate, the thickness direction of the heat transfer clamping plate is defined as a first direction, a second direction is defined to intersect with the first direction, and the convection channel is arranged in the second direction and penetrates through the two opposite ends of the heat transfer clamping plate. According to the scheme, the heat transfer efficiency and uniformity can be improved, so that the temperature rise speed and consistency of the battery monomers are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and in particular to battery production equipment and battery production systems. Background Art

[0002] During the manufacturing process of battery cells, the aging process of battery cells is a process method to accelerate the chemical self-discharge of the battery and eliminate internal polarization. This process is designed to quickly stabilize the interface between the electrode and the electrolyte, forming a uniform and stable SEI film (Solid Electrolyte Interface membrane), while being able to expose and eliminate manufacturing defects and improve the consistency and long-term stability of the battery cells.

[0003] The aging process of battery cells usually involves placing the battery cells in an aging device, leaving them for a period of time under certain temperature conditions, and using the hot air flow in the aging device to heat the battery cells. However, this heating method transfers heat directly between the hot air flow and the battery cells, and the battery cell heats up slowly. Utility Model Content

[0004] The present application provides a battery production device and a battery production system to improve the heat transfer efficiency, thereby improving the temperature rise rate of battery cells.

[0005] To achieve the above-mentioned purpose, the first technical solution provided in the present application is: a battery production equipment, including an equipment case and a tray assembly; the equipment case has a accommodating cavity for providing a specific temperature environment; the tray assembly is arranged in the accommodating cavity, the tray assembly includes a tray and a clamping assembly, the clamping assembly is arranged in the tray, the clamping assembly includes at least two vertically placed heat transfer clamps arranged side by side, and a clamping space is formed between adjacent heat transfer clamps; wherein, a convection channel is provided in the heat transfer clamp, the thickness direction of the heat transfer clamp is defined as a first direction, a second direction is defined to intersect with the first direction, and the convection channel is arranged along the second direction and passes through the opposite ends of the heat transfer clamp.

[0006] The battery production equipment provided by the present application clamps and fixes the battery cell by means of a heat transfer clamp in a tray. The heat transfer clamp can fit the battery cell to exchange heat with the battery cell to achieve heating of the battery cell. The heat transfer between the heat transfer clamp and the battery cell is heat transfer between solids and solids. Compared with the direct heat exchange between the airflow in the accommodating cavity and the battery cell, the heat transfer efficiency and uniformity of the battery cell are higher, which is conducive to achieving rapid and uniform heating of the battery cell. Moreover, since the heat transfer clamp has a convection channel inside, and the convection channel is arranged in a direction intersecting with the thickness direction of the heat transfer clamp, the hot air flow in the accommodating cavity can flow through the convection channel inside the heat transfer clamp. The convection channel can increase the heat exchange area between the heat transfer clamp and the hot air flow in the accommodating cavity, so that the hot air flow in the accommodating cavity can achieve rapid heat exchange with the heat transfer clamp, thereby achieving rapid heating of the battery cell. Moreover, the heat can be more evenly distributed to the entire heat transfer clamp through the convection channel inside the heat transfer clamp, so that the temperature of the battery cell is more uniform everywhere.

[0007] In some embodiments, the heat transfer clamp has a first side and a second side opposite to each other in a first direction, and the heat transfer clamp has a third side and a fourth side opposite to each other in a second direction, the third side and the fourth side are both adjacent to the first side, the third side and the fourth side are both adjacent to the second side, and both ends of the convection channel pass through the third side and the fourth side respectively.

[0008] In the embodiment of the present application, the first side surface and the second side surface of the heat transfer clamp are both used to fit the plate surface of the battery cell. The convection channel in the heat transfer clamp is set to have two ends respectively passing through the two side surfaces of the heat transfer clamp in the second direction, which can reduce the interference and influence of the battery cell on the hot air flow in the accommodating cavity entering the convection channel.

[0009] In some embodiments, a third direction is defined to intersect both the first direction and the second direction, and a plurality of convection channels are arranged side by side along the third direction.

[0010] In the embodiment of the present application, the convection channel extends along the second direction, and there are multiple convection channels arranged side by side along the third direction, which can further increase the inner surface area of ​​the heat transfer clamp, thereby further increasing the heat exchange area and improving the heat exchange efficiency. At the same time, the arrangement of multiple convection channels in the heat transfer clamp allows heat to be more evenly distributed to the surface of the entire heat transfer clamp. The uniform heat distribution can reduce the thermal stress inside the battery cell and reduce the risk of deformation or damage of the battery cell during the aging process.

[0011] In some embodiments, the volume of the plurality of convection channels in the heat transfer clamp accounts for 10% to 80%.

[0012] The embodiment of the present application limits the volume proportion of the multiple convection channels in the heat transfer splint to a specific range of 10% to 80%, which can enable the heat transfer splint to have a larger heat exchange area and higher heat exchange efficiency, while the heat transfer splint can also meet its stiffness and strength requirements.

[0013] In some embodiments, the surface of the heat transfer clamp includes an outer surface and an inner surface, the walls of the plurality of convection channels form the inner surface, and the ratio of the area of ​​the inner surface to the total area of ​​the surface is 20% to 90%.

[0014] In the embodiment of the present application, the ratio of the area of ​​the inner surface of the heat transfer clamp to the total surface area is limited to a specific range of 20% to 90%, which can achieve higher heat exchange efficiency while meeting the stiffness and strength requirements of the heat transfer clamp.

[0015] In some embodiments, the cross-section of the convection channel is circular, triangular, rectangular or star-shaped; wherein the cross-section is a cross-section perpendicular to the extension direction of the convection channel.

[0016] In the embodiment of the present application, the cross-section of the convection channel can be in various shapes. The cross-section of the convection channel is limited to a circle, a triangle, a rectangle or a star, which can make the cross-section area of ​​the convection channel larger and the processing of the convection channel relatively simple.

[0017] In some embodiments, the convection channel extends in a straight line, a broken line, and a curved line, or a combination of at least two thereof.

[0018] In the embodiments of the present application, there are many ways to extend the convection channel. When the convection channel extends in a straight line, the processing is simple and the hot air flow is easier to flow through. When the convection channel extends in a curve or a broken line, the cross-sectional area of ​​the convection channel is larger and the heat exchange effect is better.

[0019] In some embodiments, the second direction is the height direction of the heat transfer clamp, the convection channel extends in a straight line, and the extension direction of the convection channel is parallel to the second direction.

[0020] In the embodiment of the present application, since the density of the hot air flow in the accommodating cavity is lower than that of the air at normal temperature, the natural flow direction of the hot air flow is usually from bottom to top. The convection channel is set to extend in a vertical direction, which can enable the hot air flow in the accommodating cavity to quickly enter the convection channel from the bottom end of the convection channel and then flow out from the top end of the convection channel, thereby realizing rapid heat exchange between the hot air flow and the heat transfer splint.

[0021] In some embodiments, a heat conducting layer is provided on a surface of the heat transfer clamp at least in the first direction facing the clamping space.

[0022] In the embodiment of the present application, by providing a heat-conducting layer on the surface of the heat transfer clamp, the thermal resistance can be effectively reduced and the heat conduction efficiency between the heat transfer clamp and the battery cell can be improved.

[0023] In some embodiments, at least a portion of the bottom of the tray is a hollow structure.

[0024] In this way, the hollow structure can make the temperature inside the tray consistent with the temperature outside the tray as much as possible, and because the hot air flow also needs to enter the convection channel through the bottom end of the convection channel in the heat transfer clamp, the hollow structure at the bottom of the tray can reduce the interference and influence of the air flow in the convection channel in the heat transfer clamp to the outside of the tray.

[0025] In some embodiments, the battery production equipment further includes a heat exchange device, which is connected to the equipment housing and is used to input a hot air flow into the containing cavity, thereby providing a specific temperature environment.

[0026] In the embodiment of the present application, the heat exchange device can input a hot air flow into the accommodating cavity, actively promote the air flow in the accommodating cavity, form strong convection, and thus accelerate the transfer of heat. This forced convection heating method can significantly increase the heating rate of the battery cell.

[0027] In some embodiments, the heat exchange device includes a hot air blower, which is disposed outside the equipment box, and an output end of the hot air blower is connected to the accommodating cavity through the bottom of the equipment box.

[0028] In the embodiment of the present application, the hot air blower serves as a heat source and directly outputs a hot air flow. The hot air flow output by the hot air blower enters the accommodating cavity through the bottom of the equipment case, thereby heating the battery cells in each tray in the accommodating cavity. Since the density of the hot air flow is lower than that of the air at normal temperature, the natural flow direction of the hot air flow is usually from bottom to top. By arranging the output end of the hot air blower at the bottom of the equipment case, a hot air flow from bottom to top can be formed in the entire area in the height direction of the accommodating cavity, thereby improving the heating uniformity and consistency at various locations in the accommodating cavity.

[0029] In some embodiments, the battery production equipment also includes a temperature sensor and a controller; the temperature sensor is used to detect the temperature in the accommodation cavity; the controller connects the temperature sensor and the heat exchange device, and the controller is used to adjust the heat exchange power of the heat exchange device according to the temperature value detected by the temperature sensor.

[0030] In the embodiment of the present application, temperature monitoring is performed by a temperature sensor, and the heat exchange power of the heat exchange device is regulated by a controller, so that the temperature in the accommodating cavity can be maintained within a certain appropriate range, thereby making the heating of the battery cell more stable and the aging process of the battery cell more stable, which is beneficial to improving the consistency and long-term stability of the battery cell.

[0031] In some embodiments, multiple tray assemblies are arranged along the second direction, and the second direction is the height direction of the heat transfer clamp; the equipment box includes multiple side walls, at least one side wall is provided with a temperature sensor, and multiple temperature sensors are arranged along the second direction, and one temperature sensor corresponds to at least one tray assembly; the heat exchange device includes multiple hot air blowers arranged along the second direction, the output end of the hot air blower is connected to the accommodating cavity, and the output end of a hot air blower corresponds to a temperature sensor.

[0032] In the embodiment of the present application, a plurality of tray assemblies are arranged in the accommodating cavity along the height direction of the heat transfer splint, which are used to perform aging treatment on the plurality of battery cells in the plurality of tray assemblies. There may be local low or high temperatures in the accommodating cavity along the height direction of the heat transfer splint. Corresponding to the layout of the plurality of tray assemblies, the temperature sensor and the hot air blower are also arranged to be distributed along the second direction (i.e., the height direction of the heat transfer splint). When the temperature sensor detects that the regional temperature of the corresponding tray assembly exceeds or is lower than the preset temperature value, the controller reduces or decreases the temperature in the area by controlling the power of the corresponding hot air blower, thereby realizing precise control of the local temperature and increasing the overall heat exchange uniformity and consistency.

[0033] In order to achieve the above-mentioned purpose, the second technical solution provided in this application is: a battery production system, including the battery production equipment of any of the above solutions.

[0034] The beneficial effects of the battery production system provided in the present application are the same as those of the battery production equipment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0036] Figure 1 is a front view of a battery production device according to one or more embodiments provided in the present application;

[0037] Figure 2 is a side view of a battery production device according to one or more embodiments provided in the present application;

[0038] Figure 3 is a top view of a battery production device according to one or more embodiments of the present application;

[0039] Figure 4 is a bottom view of a battery production device according to one or more embodiments provided in the present application;

[0040] Figure 5 is a three-dimensional diagram of a battery production device according to one or more embodiments provided in the present application;

[0041] Figure 6 yes Figure 5 A vertical cross-sectional view of

[0042] Figure 7 yes Figure 6 A top view of the battery cells after being assembled in the middle tray assembly;

[0043] Fig. 8A yes Figure 7 A front view of an embodiment of a middle heat transfer clamp;

[0044] Figure 8B yes Figure 7 A side view of an embodiment of a middle heat transfer clamp;

[0045] Figure 8C yes Figure 7 A top view of an embodiment of a middle heat transfer clamp;

[0046] Fig. 9A yes Figure 7 A front view of another embodiment of the middle heat transfer clamp;

[0047] Fig. 9B yes Figure 7 A side view of another embodiment of the middle heat transfer clamp;

[0048] Fig. 9C yes Figure 7 A top view of another embodiment of the middle heat transfer clamp;

[0049] Fig.10 yes Figure 7 A top view of various different structures of another embodiment of the heat transfer clamping plate;

[0050] Fig.11 yes Figure 7 A front view of another embodiment of the middle heat transfer clamping plate;

[0051] Fig.12 yes Figure 7 A front view of another embodiment of the heat transfer clamping plate.

[0052] Description of reference numerals:

[0053] Battery cell 10; battery production equipment 100; equipment box 110; accommodating cavity 1100; box body 111; box top wall 1111; box left side wall 1112; box right side wall 1113; box bottom wall 1114; box rear wall 1115; movable door 112; pulley 113; slide rail 114; tray assembly 120; tray 121; bottom 1211; side 1212; clamping assembly 122; heat transfer clamp 1220; first side 12201; second side 12202; third side 12203; fourth side 12204; clamping space 1221; convection channel 1222; heat conductive layer 1223; heat exchange device 130; controller 140; thickness direction X; height direction Y; width direction Z. DETAILED DESCRIPTION

[0054] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0056] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0057] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0060] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] The production of battery cells is a process that is closely linked to each other. Generally speaking, the production of battery cells includes the manufacturing process of pole pieces, the battery assembly process, and the final filling, sealing, formation, and aging processes. In these three stages of the process, each process can be divided into several key processes, and each step will have a great impact on the final performance of the battery cell.

[0063] In the pole piece manufacturing process stage, it can be subdivided into five processes: slurry preparation, slurry coating, pole piece rolling, pole piece slitting, and pole piece drying. In the battery assembly process, it is roughly divided into winding, shelling, welding and other processes according to the different specifications and models of the battery. The injection process after assembly includes injection and sealing. Finally, there are three steps of battery formation, aging, and capacity separation. After the battery is manufactured, the battery needs to be pre-activated and stabilized for the first time, which is the final formation-aging-capacity separation process.

[0064] The concept of pre-formation is to charge the manufactured battery cells with a small current. After the battery cells are made, the battery needs to be charged with a small current. There are two main purposes of pre-charging: 1. After the battery is made, the electrode material is not in the best applicable state, or the physical properties are not suitable (for example, the particles are too large, the contact is not tight, etc.), or the physical phase itself is not right (for example, some metal oxide negative electrodes with alloy mechanisms), and the first charge is required to activate it; 2. During the first charging of the battery cell, Li+ is separated from the positive electrode active material, and after passing through the electrolyte-diaphragm-electrolyte, it is embedded in the negative electrode graphite material layer. In this process, electrons migrate from the positive electrode to the negative electrode along the peripheral circuit. At this time, because the potential of lithium ions embedded in the graphite negative electrode is low, the electrons will first react with the electrolyte to form a solid electrolyte interface (SEI) film and some gas.

[0065] Regarding the concept of aging, aging generally refers to the placement of the battery after the first charge and formation after the battery is assembled and filled. There can be room temperature aging or high temperature aging. Both of them are used to make the properties and composition of the SEI film formed after the initial charge and formation more stable, and improve the stability of the battery's electrochemical performance. There are three main purposes of aging: 1. After the battery undergoes the pre-formation process, a certain amount of SEI film will form on the graphite negative electrode inside the battery, but this film structure is tight and has small pores. Aging the battery at high temperature will help the SEI structure to reorganize and form a loose and porous film; 2. After formation, the voltage of the battery is in an unstable stage, and its voltage is slightly higher than the actual voltage. The purpose of aging is to make its voltage more accurate and stable; 3. Placing the battery at high temperature or room temperature for a period of time allows the electrolyte to more fully infiltrate the electrode, which is conducive to the stability of battery performance.

[0066] The battery formation-aging process is essential. In actual production, the battery charging and discharging process is selected according to the battery material system and structural system, but the battery formation must be charged under low current conditions. After these two key processes, the stabilized battery is divided into different capacities and can be shipped after packaging and other processes.

[0067] In order to accelerate the aging process and improve the production efficiency of battery cells, high-temperature aging processes are mostly adopted. In the high-temperature aging process, battery production equipment such as aging boxes are usually used to simulate a specific temperature environment. For example, the temperature is between 38 degrees and 45 degrees. The battery cells are placed in the battery production equipment for 48 to 72 hours.

[0068] Battery production equipment usually contains multiple battery cells arranged side by side and in parallel. The battery cells are heated by the hot air flow in the battery production equipment. However, the direct heat exchange between the hot air flow and the battery cells is a process of heat transfer between gas and solid. The heat exchange speed is slow and the battery cells heat up slowly.

[0069] Through research, it is found that a heat transfer clamp is provided in the battery production equipment to clamp and fit the battery cell, so as to heat the battery cell. This scheme of improving the heating method of the battery cell can increase the heating rate of the battery cell, and further improve the structure of the heat transfer clamp. By providing a convection channel in the heat transfer clamp, and the convection channel is provided in a direction intersecting with the thickness direction of the heat transfer clamp, the heat exchange area of ​​the heat transfer clamp can be increased, thereby further improving the heating rate of the battery cell by the heat transfer clamp.

[0070] Therefore, in order to improve the heat transfer efficiency and increase the heating rate of battery cells, an embodiment of the present application provides a battery production equipment, which includes an equipment case and a tray assembly; the equipment case has a accommodating cavity for providing a specific temperature environment; the tray assembly is arranged in the accommodating cavity, the tray assembly includes a tray and a clamping assembly, the clamping assembly is arranged in the tray, and the clamping assembly includes at least two vertically placed heat transfer clamps arranged side by side, and a clamping space is formed between adjacent heat transfer clamps; wherein a convection channel is provided in the heat transfer clamp, the thickness direction of the heat transfer clamp is defined as a first direction, and a second direction is defined to intersect with the first direction, and the convection channel is arranged along the second direction and passes through the opposite ends of the heat transfer clamp.

[0071] The battery cell is clamped and fixed by the heat transfer clamp in the tray, and the heat transfer clamp can fit the battery cell to exchange heat with the battery cell to achieve heating of the battery cell. The heat transfer between the heat transfer clamp and the battery cell is heat transfer between solid and solid. Compared with the direct heat exchange between the airflow in the accommodating cavity and the battery cell, the heat transfer efficiency to the battery cell is higher and the heat transfer uniformity is better, which is conducive to achieving rapid and uniform heating of the battery cell. Moreover, since the heat transfer clamp has a convection channel inside, the hot air flow in the accommodating cavity can flow through the convection channel inside the heat transfer clamp, and the convection channel can increase the heat exchange area between the heat transfer clamp and the hot air flow in the accommodating cavity. Therefore, the hot air flow in the accommodating cavity can achieve rapid heat exchange with the heat transfer clamp, thereby achieving rapid heating of the battery cell. Moreover, the heat can be more evenly distributed to the entire heat transfer clamp through the convection channel inside the heat transfer clamp, so that the temperature of the battery cell is more uniform everywhere.

[0072] The battery production equipment provided in the embodiment of the present application is mainly used to provide a specific temperature environment to heat the battery cells and accelerate the aging process of the battery cells.

[0073] The tray assembly is mainly used to place materials. The materials may include but are not limited to battery cells, battery modules, battery devices, etc., and may also include other types of materials. In the embodiments of the present application, the tray assembly is used to place battery cells as an example to illustrate the beneficial effects, which is not a limitation on the type of materials.

[0074] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0075] The battery cells may include, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel metal hydride batteries, nickel cadmium batteries, lead storage batteries, and the like.

[0076] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0077] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0078] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0079] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0080] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0081] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0082] A battery cell refers to the smallest unit that makes up a battery. A battery cell usually includes an end cap, a shell, a cell assembly, and other functional components.

[0083] The end cap and the shell together form the internal environment of the battery cell, which can be used to accommodate the battery cell assembly, electrolyte and other components. Usually, the shell has an opening, and the end cap covers the opening. The shell and the end cap can be independent components or integrated. Specifically, the shape of the shell can be determined according to the specific shape and size of the battery cell assembly, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, etc. Functional components such as electrode terminals can be provided on the end cap. The electrode terminal can be used to electrically connect to the battery cell assembly for outputting or inputting electrical energy of the battery cell. The battery cell assembly is the component in the battery cell where electrochemical reactions occur. One or more battery cell assemblies may be contained in the shell.

[0084] The battery cell assembly is mainly formed by winding or stacking the positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute the tabs. The positive tab and the negative tab can be located together at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0085] The battery production equipment provided in the embodiment of the present application is mainly used to provide a specific temperature environment for battery cells, can be applied to high-temperature aging processes in battery production, etc., and can also be used in battery testing links, such as battery temperature resistance performance testing.

[0086] The battery production system provided in the embodiment of the present application is used for the production and manufacturing of battery cells. The battery production system includes the above-mentioned battery production equipment, and may also include, but is not limited to, assembly equipment for assembling battery cells, winding equipment for winding pole pieces, lamination equipment for laminating pole pieces, die-cutting equipment / slitting equipment for cutting pole pieces, etc.

[0087] The battery production equipment provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0088] Please refer to Figures 1 to 5 , Figure 1 is a front view of a battery production device according to one or more embodiments of the present application, Figure 2 is a side view of a battery production device according to one or more embodiments of the present application, Figure 3 is a top view of a battery production device according to one or more embodiments of the present application, Figure 4 is a bottom view of a battery production device according to one or more embodiments of the present application, Figure 5 is a three-dimensional diagram of a battery production device according to one or more embodiments of the present application. Figure 6 yes Figure 5 The vertical cross-sectional view of the battery production equipment 100 includes an equipment box 110 and a tray assembly 120; the equipment box 110 has a receiving cavity 1100 for providing a specific temperature environment; the tray assembly 120 is disposed in the receiving cavity 1100, please refer to Figure 7 , Figure 7 yes Figure 6 A top view of a battery cell 10 after being assembled in a tray assembly 120, wherein the tray assembly 120 includes a tray 121 and a clamping assembly 122, wherein the clamping assembly 122 is disposed in the tray 121, and the clamping assembly 122 includes at least two vertically arranged heat transfer clamping plates 1220 arranged side by side, and a clamping space 1221 is formed between adjacent heat transfer clamping plates 1220; please refer to FIG. 8A to FIG. 8C , Fig. 8A yes Figure 7 A front view of an embodiment of the middle heat transfer clamping plate 1220, Figure 8B yes Figure 7 A side view of an embodiment of the middle heat transfer clamping plate 1220, Figure 8C yes Figure 7 A top view of an embodiment of a middle heat transfer splint 1220, wherein a convection channel 1222 is provided in the heat transfer splint 1220, a thickness direction X of the heat transfer splint 1220 is defined as a first direction, a second direction is defined to intersect with the first direction, and the convection channel 1222 is provided along the second direction and passes through opposite ends of the heat transfer splint 1220.

[0089] Among them, the equipment box 110 is used to provide a specific temperature environment for the aging process of the battery cell 10. For example, a hot air flow can be formed in the accommodating cavity 1100 of the equipment box 110. When the battery cell 10 at room temperature is placed in the accommodating cavity 1100 of the equipment box 110, the battery cell 10 is gradually heated. After the battery cell 10 is placed in the specific temperature environment in the accommodating cavity 1100 for a period of time, for example, after 48 to 72 hours, the aging treatment of the battery cell 10 is completed. The battery cell 10 after aging treatment has good consistency and long-term stability.

[0090] Exemplarily, the equipment case 110 includes a case body 111 and a movable door 112. The case body 111 is a shell structure surrounded by multiple walls. The internal space of the case body 111 forms a accommodating cavity 1100. One of the walls of the case body 111 is provided with a door opening for the tray assembly 120 and the battery cells 10 contained therein to enter and exit. The movable door 112 is movably connected to the case body 111 and can cover the door opening of the case body 111 to close the door opening of the case body 111, so that a closed space is formed inside the equipment case 110, thereby facilitating providing a specific temperature environment.

[0091] The specific temperature environment refers to the temperature environment used to implement the aging process of the battery cell 10. For example, in the high-temperature aging process, the specific temperature environment can be a temperature between 38 degrees and 45 degrees. Under this temperature environment, the aging process of the battery cell 10 is accelerated, and the time required for the aging process of the battery cell 10 can be shortened, thereby improving the production efficiency of the battery cell 10.

[0092] The tray assembly 120 is used to accommodate and carry the battery cell 10 , so that the battery cell 10 can be placed in a certain state, such as an upright state, in the accommodating cavity 1100 of the equipment box 110 .

[0093] In the tray assembly 120, the tray 121 is used as a component for accommodating and supporting the battery cell 10, and is also used as a component for installing the clamping assembly 122. The tray 121 can be connected to the device box 110, and the tray 121 is supported by the device box 110. As an example, the tray 121 can be connected to the inner wall of the box body 111 in a slidable manner, but not limited to, so that the battery cell 10 can be conveniently taken in and out by pushing and pulling the tray 121. In order to push and pull the tray 121 relative to the inner wall of the box body 111, a slide rail 114 can be installed on the inner wall of the box body 111, and correspondingly, a slider that cooperates with the slide rail 114 is installed on the outer wall of the tray 121. In this way, through the sliding cooperation between the slide rail 114 and the slider, the tray 121 is supported on the inner wall of the box body 111, and the tray 121 is conveniently pushed in and pulled out relative to the inner wall of the box body 111.

[0094] In the tray assembly 120, the clamping assembly 122 is used as a component for clamping and fixing the battery cell 10. The clamping assembly 122 includes at least two vertically placed heat transfer clamps 1220 arranged side by side. The meaning of side by side arrangement is that a plurality of heat transfer clamps 1220 are arranged at intervals along the thickness direction of the heat transfer clamps 1220. The heat transfer clamps 1220 are used to clamp and fix the battery cell 10 to limit the position of the battery cell 10, and to accelerate the temperature rise process of the battery cell 10 and improve the temperature rise uniformity of the battery cell 10.

[0095] Specifically, a clamping space 1221 is formed between adjacent heat transfer clamps 1220, and the battery cell 10 is placed in the clamping space 1221. The battery cell 10 is clamped and fixed by two adjacent heat transfer clamps 1220, so that the battery cell 10 remains in an upright state, and the heat transfer clamps 1220 can also apply pressure to the plate surface of the battery cell 10, so that the plate surface of the battery cell 10 is more evenly stressed, which is conducive to maintaining the thickness and shape of the battery cell 10 during the aging process. After the battery cell 10 is placed in the clamping space 1221, the battery cell 10 is attached to the heat transfer clamps 1220, and the hot air flow in the accommodating cavity 1100 exchanges heat with the heat transfer clamps 1220 to increase the temperature of the heat transfer clamps 1220, and the heat transfer clamps 1220 and the battery cell 10 exchange heat to increase the temperature of the battery cell 10, thereby achieving heating of the battery cell 10. The heat transfer splint 1220 achieves heat transfer by clamping the battery cell 10 and being in close contact with the battery cell 10. The heat transfer splint 1220 can be made of a metal material with a high thermal conductivity. Considering the heat transfer effect, rigidity and cost of the heat transfer splint 1220, the material of the heat transfer splint 1220 can be stainless steel, iron, copper, etc.

[0096] The specific principle of the heat transfer splint 1220 accelerating the heating process of the battery cell 10 and the uniformity of the heating process can be understood as follows: the hot air flow in the accommodating cavity 1100 is used as a heat source for heating the battery cell 10. In the related art, the battery cell 10 is heated directly by the hot air flow in the accommodating cavity 1100, which is a gas-to-solid heat transfer method. The heat transfer process is slow, and the hot air flow does not heat the battery cell 10 uniformly. In the embodiment of the present application, the battery cell 10 is heated by the heat transfer splint 1220, and the hot air flow first transfers heat. The heat transfer splint 1220 is transferred to the heat transfer splint 1220 so that the heat transfer splint 1220 heats up quickly, and the heat transfer splint 1220 then transfers heat to the battery cell 10 so that the battery cell 10 heats up. The method of heating the battery cell 10 by the heat transfer splint 1220 is a heat transfer method fixed to a solid. The solid heat transfer splint 1220 usually has better thermal conductivity, so it can increase the heating rate of the battery cell 10, and the temperature distribution inside the solid heat transfer splint 1220 is more uniform, so it can improve the uniformity and consistency of the heating of various parts of the battery cell 10.

[0097] The convection channel 1222 provided in the heat transfer clamp 1220 is used for the hot air flow in the accommodating cavity 1100 to flow through. For example, the hot air flow in the accommodating cavity 1100 can enter the convection channel 1222 from one end of the convection channel 1222 and flow out of the convection channel 1222 from the other end of the convection channel 1222, so as to increase the heat exchange area between the heat transfer clamp 1220 and the hot air flow in the accommodating cavity 1100, thereby accelerating the heating process of the heat transfer clamp 1220 by the hot air flow, and then accelerating the heating process of the battery cell 10. It is also used to improve the uniformity and consistency of the heat distribution of the heat transfer clamp 1220, thereby increasing the uniformity and consistency of the temperature rise at various locations of the battery cell 10.

[0098] In the related art, the heat transfer splint 1220 adopts a solid plate structure. Then, when the hot air flow in the accommodating cavity 1100 exchanges heat with the heat transfer splint 1220, heat is transferred only through the outer surface of the heat transfer splint 1220. In the embodiment of the present application, a convection channel 1222 is set in the heat transfer splint 1220, so that the heat transfer splint 1220 has an inner surface, and the total surface area of ​​the heat transfer splint 1220 is increased. Heat is exchanged with the hot air flow in the accommodating cavity 1100 through the outer surface and the inner surface of the heat transfer splint 1220. The heat exchange area between the hot air flow in the accommodating cavity 1100 and the heat transfer splint 1220 is larger, the hot air flow heats the heat transfer splint 1220 faster, and the heat can be more evenly distributed to the entire heat transfer splint 1220 through the convection channel 1222 inside the heat transfer splint 1220, so that the temperature of each part of the battery cell 10 is more uniform.

[0099] See also FIG. 8A to FIG. 8C as well as 9A to 9C , Fig. 9A yes Figure 7 A front view of another embodiment of the middle heat transfer clamping plate 1220, Fig. 9B yes Figure 7 A side view of another embodiment of the heat transfer clamping plate, Fig. 9C yes Figure 7The top view of another embodiment of the heat transfer splint in the middle, the convection channel 1222 is arranged along the second direction and passes through the opposite ends of the heat transfer splint 1220, and the second direction is the extension direction of the convection channel 1222. Generally speaking, the heat transfer splint 1220 has a thickness direction X, a height direction Y and a width direction Z, and the thickness direction X, the height direction Y and the width direction Z are perpendicular to each other. The first direction is the thickness direction X of the heat transfer splint 1220, and the second direction is the direction intersecting with the thickness direction X of the heat transfer splint 1220. Therefore, the heat transfer splint 1220 can have a larger inner surface area. The second direction can be perpendicular to the thickness direction X, then the extension direction of the convection channel 1222 can be along the height direction Y of the heat transfer splint 1220 or the width direction Z of the heat transfer splint 1220. Specifically, the convection channel 1222 can extend along a direction parallel to the height direction Y of the heat transfer splint 1220 ( FIG. 8A to FIG. 8C As shown in FIG. 1 ), the convection channel 1222 may also extend in a direction parallel to the width direction Z of the heat transfer clamping plate 1220 ( 9A to 9C As shown in FIG. 1 ), the convection channel 1222 may also extend in a direction inclined relative to the height direction Y of the heat transfer clamping plate 1220 or in a direction inclined relative to the width direction Z of the heat transfer clamping plate 1220. Regardless of the direction in which the convection channel 1222 extends, as long as the extension direction of the convection channel 1222 intersects with the thickness direction of the heat transfer clamping plate 1220, the heat transfer clamping plate 1220 can have a larger inner surface area.

[0100] It can be seen that in the battery production equipment provided in the embodiment of the present application, the equipment box 110 is used to provide a specific temperature environment for the aging process of the battery cell 10, the tray 121 is used as a component for accommodating and supporting the battery cell 10, and the clamping assembly 122 is used as a component for clamping and fixing the battery cell 10. The clamping assembly 122 includes at least two vertically placed heat transfer clamps 1220 arranged side by side, and a clamping space 1221 is formed between adjacent heat transfer clamps 1220. The battery cell 10 is placed in the clamping space 1221, and the battery cell 10 is clamped and fixed by two adjacent heat transfer clamps 1220, so that the battery cell 10 remains in an upright state, and after the battery cell 10 is placed in the clamping space 1221, the battery cell 10 is attached to the heat transfer clamp 1220. The hot air flow in the accommodating cavity 1100 exchanges heat with the heat transfer clamp 1220 to increase the temperature of the heat transfer clamp 1220, and the heat transfer clamp 1220 exchanges heat with the battery cell 10 to increase the temperature of the battery cell 10, thereby achieving heating of the battery cell 10. The convection channel 1222 provided in the heat transfer clamp 1220 is used for the hot air flow in the accommodating cavity 1100 to flow through, thereby increasing the heat exchange area between the heat transfer clamp 1220 and the hot air flow in the accommodating cavity 1100, thereby accelerating the heating process of the hot air flow on the heat transfer clamp 1220, and further accelerating the heating speed of the battery cell 10, and the heat can be more evenly distributed to the entire heat transfer clamp 1220 through the convection channel 1222 inside the heat transfer clamp 1220, thereby making the temperature of the battery cell 10 more uniform.

[0101] In some embodiments, the heat transfer clamp 1220 has a first side 12201 and a second side 12202 that are opposite to each other in a first direction, and the heat transfer clamp 1220 has a third side 12203 and a fourth side 12204 that are opposite to each other in a second direction, the third side 12203 and the fourth side 12204 are both adjacent to the first side 12201, the third side 12203 and the fourth side 12204 are both adjacent to the second side 12202, and both ends of the convection channel 1222 pass through the third side 12203 and the fourth side 12204 respectively.

[0102] The first side surface 12201 and the second side surface 12202 are two side surfaces of the heat transfer clamping plate 1220 in the thickness direction X. Figures 8A to 8C When the height direction Y of the heat transfer clamping plate 1220 is shown, the third side surface 12203 and the fourth side surface 12204 are two side surfaces of the heat transfer clamping plate 1220 in the height direction Y; when the second direction is 9A to 9C In the width direction Z of the heat transfer clamping plate 1220 shown in FIG. 1 , the third side surface 12203 and the fourth side surface 12204 are two side surfaces of the heat transfer clamping plate 1220 in the width direction Z respectively.

[0103] In the embodiment of the present application, the first side surface 12201 and the second side surface 12202 of the heat transfer clamp 1220 are both used to fit the plate surface of the battery cell 10, and the convection channel 1222 in the heat transfer clamp 1220 is set to have two ends respectively passing through the two side surfaces of the heat transfer clamp 1220 in the second direction, which can reduce the interference and influence of the battery cell 10 on the hot air flow in the accommodating cavity 1100 entering the convection channel 1222.

[0104] In other embodiments of the present application, it is not excluded that the two ends of the convection channel 1222 respectively penetrate the first side 12201 and the second side 12202 of the heat transfer splint 1220, for example, one end of the convection channel 1222 penetrates the first side 12201 close to the bottom of the heat transfer splint 1220, and the other end of the convection channel 1222 penetrates the second side 12202 close to the top of the heat transfer splint 1220. However, in this case, when the battery cell 10 is attached to the first side 12201 and the second side 12202, the two ends of the convection channel 1222 need to be exposed without being blocked by the battery cell 10, so as to facilitate the hot air flow through the convection channel 1222. This scheme can also achieve the effect that the hot air flow in the accommodating cavity 1100 enters from one end of the convection channel 1222 and flows out from the other end of the convection channel 1222.

[0105] However, in order to ensure that the two ends of the convection channel 1222 are not partially or completely blocked by the battery cell 10 after the battery cell 10 is attached to the first side 12201 / second side 12202 of the heat transfer clamp 1220, the two ends of the convection channel 1222 should be set as much as possible not to penetrate the first side 12201 and the second side 12202 of the heat transfer clamp 1220, but to penetrate the third side 12203 and the fourth side 12204 of the heat transfer clamp 1220.

[0106] In some embodiments, a third direction is defined to intersect both the first direction and the second direction, and a plurality of convection channels 1222 are arranged side by side along the third direction.

[0107] The third direction intersects with both the first direction and the second direction, and the first direction, the second direction and the third direction may be perpendicular to each other.

[0108] When the second direction is FIG. 8A to FIG. 8C When the height direction Y of the heat transfer clamp plate 1220 is shown, the third direction may be the width direction Z of the heat transfer clamp plate 1220 . In this case, the convection channels 1222 are multiple and arranged side by side along the width direction Z of the heat transfer clamp plate 1220 . FIG. 8A to FIG. 8C The example shows a case where four convection channels 1222 are arranged along the width direction Z of the heat transfer clamp plate 1220 . In other embodiments, the number of convection channels 1222 arranged along the width direction Z of the heat transfer clamp plate 1220 may be other numbers.

[0109] When the second direction is 9A to 9C When the width direction Z of the heat transfer clamp plate 1220 is shown, the third direction may be the height direction Y of the heat transfer clamp plate 1220 . In this case, the convection channels 1222 are multiple and arranged side by side along the height direction Y of the heat transfer clamp plate 1220 . 9A to 9C The example shows a situation where seven convection channels 1222 are arranged along the height direction Y of the heat transfer clamp plate 1220 . In other embodiments, the number of convection channels 1222 arranged along the height direction Y of the heat transfer clamp plate 1220 may be other numbers.

[0110] In the embodiment of the present application, the convection channel 1222 extends along the second direction, and the convection channels 1222 are multiple and arranged side by side along the third direction, which can further increase the inner surface area of ​​the heat transfer clamp 1220, thereby further increasing the heat exchange area of ​​the heat transfer clamp 1220, and the heat exchange efficiency is higher. At the same time, the provision of multiple convection channels 1222 in the heat transfer clamp 1220 allows heat to be more evenly distributed to the surface of the entire heat transfer clamp 1220. The uniform heat distribution can reduce the thermal stress inside the battery cell 10 and reduce the risk of deformation or damage of the battery cell 10 during the aging process.

[0111] In some embodiments, the convection channels 1222 are arranged in a first direction (ie, a thickness direction X of the heat transfer clamping plate 1220 ). FIG. 8A to FIG. 8C as well as 9A to 9C The figures all show the case where one convection channel 1222 is arranged along the first direction (i.e., the thickness direction X of the heat transfer clamping plate 1220). In other embodiments, a plurality of convection channels 1222 are arranged along the first direction (i.e., the thickness direction X of the heat transfer clamping plate 1220) (not shown in the figures), so that the number of convection channels 1222 in the heat transfer clamping plate 1220 is greater, the inner surface area of ​​the heat transfer clamping plate 1220 is increased, the heat exchange area of ​​the heat transfer clamping plate 1220 is increased, and the heat exchange efficiency is higher.

[0112] In some embodiments, the volume of the plurality of convection channels 1222 in the heat transfer clamp plate 1220 accounts for 10% to 80%. For example, the volume of the plurality of convection channels 1222 in the heat transfer clamp plate 1220 may account for 10%, 20%, 30%, 40%, 50%, 60%, 70% or 80%.

[0113] The volume of the plurality of convection channels 1222 is set to V1, the total volume of the heat transfer clamp 1220 is set to V, and the total volume V of the heat transfer clamp 1220 is the sum of the volume of the solid part of the heat transfer clamp 1220 and the volume of the plurality of convection channels 1222 (cavity). Then, the calculation formula for the volume proportion of the plurality of convection channels 1222 in the heat transfer clamp 1220 is: .

[0114] The volume ratio of the multiple convection channels 1222 in the heat transfer clamp 1220 is related to the heat exchange efficiency, stiffness and strength of the heat transfer clamp 1220. Specifically, the larger the volume ratio of the multiple convection channels 1222 in the heat transfer clamp 1220, the larger the heat exchange area, and the higher the heat exchange efficiency, but the stiffness and strength of the heat transfer clamp 1220 are also lower, and the heat transfer clamp 1220 is more likely to deform; the smaller the volume ratio of the multiple convection channels 1222 in the heat transfer clamp 1220, the smaller the heat exchange area, the lower the heat exchange efficiency, and it is difficult to achieve rapid heating of the battery cell 10, but the stiffness and strength of the heat transfer clamp 1220 are also higher. Therefore, the volume proportion of the multiple convection channels 1222 in the heat transfer clamp 1220 should not be too small, otherwise the heat exchange efficiency will be too low. The volume proportion of the multiple convection channels 1222 in the heat transfer clamp 1220 should not be too large, otherwise the stiffness and strength of the heat transfer clamp 1220 will be too low.

[0115] The embodiment of the present application limits the volume proportion of the multiple convection channels 1222 in the heat transfer clamp 1220 to a specific range of 10% to 80%, which can enable the heat transfer clamp 1220 to have a larger heat exchange area and a higher heat exchange efficiency. At the same time, the heat transfer clamp 1220 can also meet its stiffness and strength requirements.

[0116] Furthermore, the volume proportion of the plurality of convection channels 1222 in the heat transfer clamping plate 1220 is preferably 30% to 80%. Further limiting the volume proportion of the plurality of convection channels 1222 in the heat transfer clamping plate 1220 to a specific range of 30% to 80% can achieve higher heat exchange efficiency while meeting its rigidity and strength requirements.

[0117] Furthermore, the volume proportion of the plurality of convection channels 1222 in the heat transfer clamping plate 1220 is preferably 40% to 60%. Further limiting the volume proportion of the plurality of convection channels 1222 in the heat transfer clamping plate 1220 to a specific range of 40% to 60% can achieve higher heat exchange efficiency while meeting its rigidity and strength requirements.

[0118] In some embodiments, the surface of the heat transfer clamp 1220 includes an outer surface and an inner surface, and the walls of the plurality of convection channels 1222 form the inner surface of the heat transfer clamp 1220, and the ratio of the area of ​​the inner surface to the total area of ​​the surface is 20% to 90%. For example, the ratio of the area of ​​the inner surface to the total area of ​​the surface may be 20%, 30%, 40%, 50%, 60%, 70%, 80% or 90%.

[0119] In the embodiment of the present application, the ratio of the inner surface area of ​​the heat transfer splint 1220 to the total surface area is limited to a specific range of 20% to 90%, which can achieve higher heat exchange efficiency while meeting the stiffness and strength requirements of the heat transfer splint 1220.

[0120] In some embodiments, the cross-section of the convection channel 1222 is circular, triangular, rectangular, or star-shaped; wherein the cross-section of the convection channel 1222 is a cross-section perpendicular to the extension direction of the convection channel 1222 .

[0121] FIG. 8A to FIG. 8C as well as 9A to 9C Both show the case where the cross section of the convection channel 1222 is circular.

[0122] See also Fig.10 , Fig.10 yes Figure 7 A top view of various different structures of another embodiment of the heat transfer clamping plate 1220, wherein: Fig.10 (a) shows the case where the cross section of the convection channel 1222 is triangular. Fig.10 (b) shows the case where the cross section of the convection channel 1222 is rectangular. Fig.10 (c) shows a case where the cross section of the convection channel 1222 is star-shaped. The cross section of the convection channel 1222 is not limited to the above-mentioned circular, triangular, rectangular or star-shaped shapes, but can also be any other shape, which is not specifically limited in the present application.

[0123] In the embodiment of the present application, the cross-section of the convection channel 1222 can be a variety of shapes. The cross-section of the convection channel 1222 is limited to a circle, a triangle, a rectangle or a star, which can make the cross-section area of ​​the convection channel 1222 larger and the processing of the convection channel 1222 relatively simple.

[0124] In some embodiments, the convection channel 1222 extends in a straight line, a broken line, or a curved line, or a combination of at least two of them.

[0125] The convection channel 1222 extends in a straight line, a broken line or a curve, or in a combination of at least two of the two. The convection channel 1222 can be extended in the following ways:

[0126] The first extension manner of the convection channel 1222: the convection channel 1222 extends in one of a straight line, a folded line, and a curve. For example, the convection channel 1222 may extend only in a straight line, only in a folded line, or only in a curve.

[0127] FIG. 8A to FIG. 8C as well as 9A to 9CBoth show the situation where the convection channel 1222 extends in a straight line.

[0128] See also Fig.11 , Fig.11 yes Figure 7 A front view of another embodiment of the middle heat transfer clamping plate 1220, Fig.11 The case where the convection channel 1222 extends in a curved line is shown.

[0129] See also Fig.12 , Fig.12 yes Figure 7 A front view of another embodiment of the middle heat transfer clamping plate 1220, Fig.12 The situation where the convection channel 1222 extends in a broken line is shown.

[0130] The second extension manner of the convection channel 1222 (not shown in the figure): the convection channel 1222 extends in a straight line, a broken line or a combination of two of them. For example, along the extension direction of the convection channel 1222, a part of the convection channel 1222 extends in a straight line and another part extends in a broken line, or a part of the convection channel 1222 extends in a straight line and another part extends in a curve, or a part of the convection channel 1222 extends in a broken line and another part extends in a curve.

[0131] The third extension method of the convection channel 1222 (not shown in the figure): the convection channel 1222 extends in a combination of a straight line, a broken line and a curve. For example, along the extension direction of the convection channel 1222, a part of the convection channel 1222 extends in a straight line, a part extends in a broken line, and another part extends in a curve.

[0132] In the embodiment of the present application, the convection channel 1222 can be extended in a variety of ways. When the convection channel 1222 extends in a straight line, the processing is simple and the hot air flow is easier to flow through. When the convection channel 1222 extends in a curve or a broken line, the cross-sectional area of ​​the convection channel 1222 is larger and the heat exchange effect is better.

[0133] In some embodiments, refer again to FIG. 8A to FIG. 8C The second direction is the height direction Y of the heat transfer clamping plate 1220 , the convection channel 1222 extends in a straight line, and the extension direction of the convection channel 1222 is parallel to the second direction.

[0134] In the embodiment of the present application, the extension direction of the convection channel 1222 is parallel to the height direction Y of the heat transfer splint 1220. Since the density of the hot air flow in the accommodating cavity 1100 is lower than that of the air at normal temperature, the natural flow direction of the hot air flow is usually from bottom to top. The convection channel 1222 is set to extend in a vertical direction, which can enable the hot air flow in the accommodating cavity 1100 to quickly enter the convection channel 1222 from the bottom end of the convection channel 1222 and then flow out from the top end of the convection channel 1222, thereby realizing rapid heat exchange between the hot air flow and the heat transfer splint 1220.

[0135] In some embodiments, the thickness L1 of the heat transfer splint 1220 is 35 mm to 40 mm. For example, the thickness L1 of the heat transfer splint 1220 may be 35 mm, 36 mm, 37 mm, 38 mm, 39 mm or 40 mm. The thickness L1 of the heat transfer splint 1220 is the dimension of the heat transfer splint 1220 in the thickness direction X.

[0136] In some embodiments, the width L2 of the heat transfer clamping plate 1220 is 200 mm to 230 mm. For example, the width L2 of the heat transfer clamping plate 1220 can be 200 mm, 210 mm, 215 mm, 220 mm, 225 mm or 230 mm. The width L2 of the heat transfer clamping plate 1220 is the size of the heat transfer clamping plate 1220 in the width direction Z.

[0137] In some embodiments, the height L3 of the heat transfer clamp 1220 is 310 mm to 340 mm. For example, the height L3 of the heat transfer clamp 1220 can be 310 mm, 316 mm, 321 mm, 328 mm, 334 mm or 340 mm. The height L3 of the heat transfer clamp 1220 is the size of the heat transfer clamp 1220 in the height direction Y.

[0138] In some embodiments, the cross section of the convection channel 1222 is circular, and the radial dimension D of the convection channel 1222 is 20 mm to 25 mm. For example, the radial dimension D of the convection channel 1222 can be 20 mm, 20 mm, 20 mm, 20 mm, 20 mm, or 25 mm.

[0139] In a preferred embodiment, FIG. 8A to FIG. 8CAs shown, the thickness L1 of the heat transfer splint 1220 is 37 mm, the width L2 is 215 mm, and the height L3 is 321 mm. There are four convection channels 1222 in the heat transfer splint 1220. The four convection channels 1222 are spaced apart along the width direction Z of the heat transfer splint 1220. The convection channels 1222 extend in a straight line, and the extension direction of the convection channels 1222 is parallel to the height direction Y of the heat transfer splint 1220. The radial dimension D of the convection channels 1222 is 22 mm. Then, in this preferred embodiment, the volume of the four convection channels 1222 in the heat transfer splint 1220 accounts for 12.8%, and the ratio of the inner surface area of ​​the heat transfer splint 1220 to the total surface area is 26.3%.

[0140] It can be understood that the heat transfer splint 1220 having multiple convection channels 1222 inside is a porous plate structure. The more the convection channels 1222 in the heat transfer splint 1220 are and the larger their volume share is, the larger the inner surface area of ​​the heat transfer splint 1220 is. The larger the ratio of the inner surface area of ​​the heat transfer splint 1220 to the total surface area is, the larger the total surface area is, that is, the larger the heat exchange area between the heat transfer splint 1220 and the hot air flow in the accommodating cavity 1100 is, which helps to improve the heat transfer efficiency and uniformity, thereby improving the speed and consistency of heating of the battery cell 10.

[0141] In some embodiments, refer again to Figure 7 A heat conducting layer 1223 is provided on a surface of the heat transfer clamping plate 1220 facing the clamping space 1221 at least in a first direction (ie, a thickness direction X of the heat transfer clamping plate 1220 ). The heat conductive layer 1223 is used to increase the heat transfer efficiency between the heat transfer clamp 1220 and the battery cell 10 in the clamping space 1221. Generally speaking, the heat conductive layer 1223 is soft. When the battery cell 10 is clamped between two adjacent heat transfer clamps 1220, the battery cell 10 can squeeze the heat conductive layer 1223, so that the heat conductive layer 1223 fills the local gap between the battery cell 10 and the heat transfer clamp 1220, especially the edges of the battery cell 10 and other parts that are not easy to fit with the heat transfer clamp 1220. The heat conductive layer 1223 can fill the gap between the heat transfer clamp 1220 and the battery cell 10, and the heat transfer effect is better, so that heat can be transferred from the heat transfer clamp 1220 to the battery cell 10 more quickly, thereby increasing the heating rate of the battery cell 10.

[0142] In the embodiment of the present application, by providing a heat-conducting layer 1223 on the surface of the heat transfer clamping plate 1220 , the thermal resistance can be effectively reduced and the heat conduction efficiency between the heat transfer clamping plate 1220 and the battery cell 10 can be improved.

[0143] The meaning of thermal resistance is the resistance to heat transfer of an object during the heat transfer process. When heat is transferred from the heat transfer clamp 1220 to the battery cell 10, since the heat transfer clamp 1220 and the battery cell 10 are not completely attached, there is a local gap between the attached surfaces of the heat transfer clamp 1220 and the battery cell 10, and the air in the gap will hinder the heat transfer, so there is thermal resistance when heat is transferred between the heat transfer clamp 1220 and the battery cell 10.

[0144] It should be noted that heat is transferred between the heat transfer clamp 1220 and the battery cell 10 through the heat conductive layer 1223 to increase the heat conduction efficiency. The thickness of the heat conductive layer 1223 itself should not be too large, and the thermal resistance of the heat conductive layer 1223 itself should be as small as possible, otherwise it will hinder the heat transfer between the heat transfer clamp 1220 and the battery cell 10.

[0145] In some embodiments, the heat-conducting layer 1223 includes a heat-conducting silicone oil layer. The heat-conducting silicone oil layer has good thermal conductivity and good high and low temperature resistance. The heat-conducting silicone oil layer can usually be used for heat conduction in a high temperature environment. The heat-conducting silicone oil layer can be formed by coating or applying heat-conducting silicone oil on the surface of the heat transfer clamp 1220.

[0146] In some embodiments, the heat-conducting layer 1223 may also be a thermally conductive silicone grease layer. The thermally conductive silicone grease layer has good thermal conductivity and extremely low thermal resistance. The thermally conductive silicone grease layer may be formed by coating or applying thermally conductive silicone grease on the surface of the heat transfer clamp 1220.

[0147] In some embodiments, the heat transfer splint 1220 is a stainless steel heat transfer splint 1220, an aluminum heat transfer splint 1220, an iron heat transfer splint 1220, or a copper heat transfer splint 1220. Stainless steel has good heat transfer effect, good rigidity and strength; aluminum has good heat transfer effect, low cost, light weight, and not too low rigidity and strength; iron has good heat transfer effect, and lower cost than aluminum, but lower rigidity and strength than aluminum; copper has the best heat transfer effect, but high cost. Therefore, the required heat transfer splint 1220 material can be selected by comprehensively considering factors such as material rigidity, heat transfer effect, and cost.

[0148] In some embodiments, refer again to Figure 6 and Figure 7 , at least part of the bottom 1211 of the tray 121 is a hollow structure ( Figure 7 The hollow structure is not shown).

[0149] In some embodiments, the tray 121 is a shell structure with an open top, which includes a plurality of walls, and the plurality of walls enclose a space for accommodating the battery cells 10. The wall opposite to the opening at the top of the tray 121 is the bottom 1211 of the tray 121, and the wall adjacent to the opening of the tray 121 is the side 1212 of the tray. The bottom 1211 of the tray 121 is used to carry the battery cells 10. The battery cells 10 can be loaded into the tray 121 through the opening at the top of the tray 121 and carried on the bottom 1211 of the tray 121, and clamped by the adjacent heat transfer clamping plates 1220 of the clamping assembly 122. In other embodiments, the tray 121 is a plate-like structure, that is, the tray 121 only has the bottom 1211 but no side 1212, and the plate-like structure is the bottom 1211 of the tray 121.

[0150] In some embodiments, the bottom 1211 of the tray 121 can also be used to carry the heat transfer clamp 1220, and the bottom of the heat transfer clamp 1220 can be attached to and carried on the bottom 1211 of the tray 121. In other embodiments, the bottom of the heat transfer clamp 1220 can also have a certain distance from the bottom 1211 of the tray 121, and the bottom 1211 of the tray 121 only serves as a bearing component for the battery cell 10, and the heat transfer clamp 1220 can be fixed to the side 1212 of the tray 121.

[0151] Since the flow direction of the hot air flow is usually from bottom to top, at least a portion of the bottom 1211 of the tray 121 is set as a hollow structure. The hot air flow outside the tray 121 can enter the tray 121 through the hollow structure of the bottom 1211 of the tray, and then enter the convection channel 1222 in the heat transfer clamp 1220.

[0152] In this way, the hollow structure can make the internal temperature of the tray 121 as consistent as possible with the external temperature of the tray 121, and because the hot air flow also needs to enter the convection channel 1222 through the bottom end of the convection channel 1222 in the heat transfer clamp 1220, the hollow structure of the bottom 1211 of the tray 121 can reduce the obstruction and interference of the hot air flow when entering the convection channel 1222 in the heat transfer clamp 1220.

[0153] The meaning that at least part of the bottom 1211 of the tray 121 is a hollow structure is that, when the tray 121 only has the bottom 1211, part or all of the bottom 1211 of the tray 121 is a hollow structure; when the tray 121 has a side 1212 in addition to the bottom 1211, part or all of the bottom 1211 of the tray 121 is a hollow structure, part of the side 1212 of the tray 121 is a hollow structure, or all of the side 1212 of the tray 121 is a hollow structure.

[0154] It can be understood that the tray 121 is provided with a hollow structure to make the internal temperature of the tray 121 and the external temperature of the tray 121 as consistent as possible, so as to reduce the temperature difference between the inside and outside of the tray 121. Therefore, the tray 121 can be set to have a hollow structure everywhere, that is, the bottom 1211 and the side 1212 of the tray 121 are both hollow structures, so as to improve the consistency between the internal temperature of the tray 121 and the external temperature of the tray 121.

[0155] It can also be understood that the hollow structure of the bottom 1211 of the tray 121 is used to allow the hot air flow outside the tray 121 to enter the convection channel 1222 in the heat transfer splint 1220. Therefore, the pore portion of the hollow structure of the bottom 1211 of the tray 121 should be aligned with the convection channel 1222 in the heat transfer splint 1220, and the solid portion of the hollow structure should avoid the convection channel 1222 in the heat transfer splint 1220 as much as possible to reduce the obstruction of the bottom 1211 of the tray 121 to the hot air flow outside the tray 121 entering the convection channel 1222 in the heat transfer splint 1220.

[0156] In some embodiments, a battery cell 10 (such as Figure 7 ), so as to better limit the position of a single battery cell 10 and improve the heat transfer efficiency between the heat transfer clamp 1220 and the single battery cell 10. In other embodiments, multiple battery cells 10 are clamped in two adjacent heat transfer clamps 1220 (not shown in the figure), and the arrangement direction of the multiple battery cells 10 can be the thickness direction of the battery cell 10, or a direction intersecting the thickness direction of the battery cell 10, such as the width direction Z or the height direction Y of the heat transfer clamp 1220. It can be understood that in order to improve the heat transfer efficiency of the multiple battery cells 10 and improve the uniformity and consistency of the temperature rise of the multiple battery cells 10, the heat transfer clamp 1220 should be attached to the plate surface of each battery cell 10.

[0157] The arrangement of the plurality of heat transfer clamps 1220 may be set according to the arrangement of the plurality of battery cells 10 in the tray 121 . The following is an example in which one battery cell 10 is clamped between two adjacent heat transfer clamps 1220 .

[0158] In some embodiments, when the plurality of battery cells 10 in the tray 121 are arranged in a plurality of rows and columns along the width direction Z and the thickness direction X of the heat transfer clamping plate 1220 (eg Figure 7As shown in FIG. 1 ), correspondingly, the plurality of heat transfer clamps 1220 are also arranged in a plurality of rows and columns along the width direction Z and the thickness direction X of the heat transfer clamps 1220. In the thickness direction X of the heat transfer clamps 1220, a battery cell 10 is clamped between two adjacent heat transfer clamps 1220 in each column. In this solution, the plurality of heat transfer clamps 1220 in the same row in the width direction Z of the heat transfer clamps 1220 can be arranged at intervals or connected as a large integral heat transfer clamp 1220, so as to reduce the number of heat transfer clamps 1220 and facilitate the installation of the battery cells 10.

[0159] In some embodiments, when multiple battery cells 10 in the tray 121 are arranged in a single row along the thickness direction X of the heat transfer clamp 1220 (not shown in the figure), correspondingly, multiple heat transfer clamps 1220 are also arranged in a single row along the thickness direction X of the heat transfer clamp 1220. In the thickness direction X of the heat transfer clamp 1220, a battery cell 10 is clamped between two adjacent heat transfer clamps 1220 in the single row.

[0160] In some embodiments, when multiple battery cells 10 in the tray 121 are arranged in a single row along the width direction Z of the heat transfer clamp 1220, correspondingly, multiple heat transfer clamps 1220 are arranged in two rows along the width direction Z of the heat transfer clamp 1220, and in the thickness direction X of the heat transfer clamp 1220, a battery cell 10 is clamped between two adjacent heat transfer clamps 1220.

[0161] In some embodiments, each heat transfer clamp 1220 can be connected to the tray 121. In other embodiments, each heat transfer clamp 1220 can be connected to form a whole structure, and then the whole structure is connected to the tray 121.

[0162] There may be multiple ways to connect the heat transfer clamp 1220 to the tray 121. In some embodiments, the heat transfer clamp 1220 is detachably fixed to the tray 121, which is conducive to adjusting the spacing between adjacent heat transfer clamps 1220 according to the thickness of the battery cell 10, and when placing the battery cell 10, the heat transfer clamp 1220 can be loosened first, and the battery cell 10 is placed in the clamping space 1221 between the adjacent heat transfer clamps 1220, and then the heat transfer clamp 1220 is locked to the tray 121. Therefore, the heat transfer clamp 1220 is detachably fixed to the tray 121, which can also facilitate the placement of the battery cell 10 in the clamping space 1221 between the adjacent heat transfer clamps 1220, and facilitate the heat transfer clamp 1220 to clamp the battery cell 10. It can be understood that under this scheme, the heat transfer clamp 1220 and the battery cell 10 are more closely attached, so the heat transfer effect is better. In other embodiments, it is not excluded that the heat transfer clamps 1220 are fixed in the tray 121 in a non-detachable manner. In this solution, when placing the battery cells 10, the battery cells 10 can be directly inserted into the clamping spaces 1221 between adjacent heat transfer clamps 1220.

[0163] In some embodiments, a plurality of tray assemblies 120 are arranged along the height direction Y of the heat transfer clamp 1220, that is, the height direction of the device box 110. In this way, the device box 110 can be used to simultaneously perform aging treatment on multiple battery cells 10 in multiple tray assemblies 120, thereby improving the space utilization of the device box 110 and facilitating batch aging treatment of multiple battery cells 10.

[0164] In some embodiments, refer again to Figure 4 and Figure 6 The battery production equipment 100 also includes a heat exchange device 130, which is connected to the equipment box 110 and is used to input hot air flow into the accommodating chamber 1100, thereby providing the above-mentioned specific temperature environment.

[0165] In the embodiment of the present application, the heat exchange device 130 can input hot air flow into the accommodating cavity 1100, actively promote the air flow in the accommodating cavity 1100, form strong convection, and thus accelerate the transfer of heat. This forced convection heating method can significantly increase the heating rate of the battery cell 10.

[0166] In the related art, the heating of the battery cell 10 in the accommodating cavity 1100 is a natural convection heat transfer method. Specifically, only a heater for heating the air in the accommodating cavity 1100 is provided in the accommodating cavity 1100. The air temperature in the area closer to the heater is higher, and the air temperature in the area farther from the heater is lower. There is a temperature difference in the air in the accommodating cavity 1100. Due to the thermal expansion and contraction effect, the cold air with higher density sinks and the hot air with lower density rises, thereby forming natural convection. This flow will form convection heat transfer in the accommodating cavity 1100, but the hot air in the accommodating cavity 1100 flows slowly, and the heating rate of the battery cell 10 is slow and the heating consistency is poor. The method of heating the battery cell 10 by the heat exchange device 130 in the embodiment of the present application is a forced convection heat transfer method. The flow rate of the hot air flow in the accommodating cavity 1100 is increased, thereby increasing the heat transfer efficiency and heat transfer uniformity.

[0167] In some embodiments, the heat exchange device 130 includes a hot air blower, which is disposed outside the equipment case 110 , and an output end of the hot air blower is connected to the accommodating cavity 1100 through the bottom of the equipment case 110 .

[0168] In the embodiment of the present application, the hot air blower serves as a heat source and directly outputs a hot air flow. The hot air flow output by the hot air blower passes through the bottom of the equipment case 110 and enters the accommodating cavity 1100, thereby heating the battery cells 10 in each tray 121 in the accommodating cavity 1100. Since the density of the hot air flow is lower than that of the air at normal temperature, the natural flow direction of the hot air flow is usually from bottom to top. By setting the output end of the hot air blower at the bottom of the equipment case 110, a hot air flow from bottom to top can be formed in the entire area in the height direction of the accommodating cavity 1100, thereby improving the heating uniformity and consistency of various places in the accommodating cavity 1100.

[0169] In other embodiments, the heat exchange device 130 includes a heater and a blower. The heater can be disposed in the accommodating chamber 1100, and the blower can be disposed outside the accommodating chamber 1100. The heater serves as a heat source to heat the air in the accommodating chamber 1100, and the blower is used to drive the hot air in the accommodating chamber 1100 to produce rapid flow. The blower can also be equivalently replaced by a fan, agitator or pump, etc.

[0170] In some embodiments, the battery production equipment 100 also includes a temperature sensor (not shown in the figure) and a controller 140. The temperature sensor is used to detect the temperature inside the accommodating cavity 1100. The controller 140 connects the temperature sensor and the heat exchange device 130. The controller 140 is used to adjust the heat exchange power of the heat exchange device 130 according to the temperature value detected by the temperature sensor.

[0171] In the embodiment of the present application, temperature monitoring is performed by a temperature sensor, and the heat exchange power of the heat exchange device 130 is regulated by the controller 140, so that the temperature in the accommodating cavity 1100 can be maintained within a certain appropriate range, thereby making the heating of the battery cell 10 more stable, and the internal thermal stress of the battery cell 10 is maintained in a relatively stable range, which is beneficial to improving the consistency and long-term stability of the battery cell 10.

[0172] In some embodiments, multiple tray assemblies 120 are arranged along the second direction, and the second direction is the height direction Y of the heat transfer clamp 1220. The equipment box 110 includes multiple side walls, at least one side wall is provided with a temperature sensor, and multiple temperature sensors are arranged along the second direction (i.e., the height direction Y of the heat transfer clamp 1220), and one temperature sensor corresponds to at least one tray assembly 120; the heat exchange device 130 includes multiple hot air blowers arranged along the second direction (i.e., the height direction Y of the heat transfer clamp 1220), the output end of the hot air blower is connected to the accommodating cavity 1100, and the output end of a hot air blower corresponds to a temperature sensor.

[0173] The box body 111 may include a box top wall 1111, a box left side wall 1112, a box right side wall 1113, a box bottom wall 1114, and a box rear wall 1115. The box rear wall 1115 is arranged opposite to the movable door 112, and the box left side wall 1112 is arranged opposite to the box right side wall 1113. The multiple side walls of the device box 110 of the embodiment of the present application may include the box left side wall 1112, the box right side wall 1113, the box rear wall 1115, and the movable door 112 of the box body 111. The temperature sensor is at least arranged on at least one of the box left side wall 1112, the box right side wall 1113, the box rear wall 1115, and the movable door 112 to monitor the temperature in the accommodating cavity 1100.

[0174] In the embodiment of the present application, a plurality of tray assemblies 120 are arranged in the accommodating cavity 1100 along the height direction Y of the heat transfer clamp 1220, which are used to perform aging treatment on the plurality of battery cells 10 in the plurality of tray assemblies 120. There may be local low or high temperatures in the accommodating cavity 1100 along the height direction Y of the heat transfer clamp 1220. Corresponding to the layout of the plurality of tray assemblies 120, the temperature sensor and the hot air blower are also arranged to be distributed along the second direction (i.e., the height direction Y of the heat transfer clamp 1220). When the temperature sensor detects that the regional temperature of the corresponding tray assembly 120 exceeds or is lower than the preset temperature value, the controller 140 reduces or increases the temperature in the region by controlling the power of the corresponding hot air blower, thereby realizing precise control of the local temperature and increasing the overall heat exchange uniformity and consistency.

[0175] In addition, the present application also provides a battery production system, which includes the above-mentioned battery production equipment. The introduction of the battery production system can be referred to the above records, and will not be repeated here.

[0176] Finally, in a specific application scenario, for existing battery production equipment, the battery cells are directly heated by the hot air flow in the battery production equipment, which has the problem of slow heat exchange speed and slow heating speed of the battery cells. In view of this, the battery production equipment 100 of the present application includes an equipment box 110 and a tray assembly 120; the equipment box 110 has a accommodating cavity 1100 for providing a specific temperature environment; the tray assembly 120 is arranged in the accommodating cavity 1100, the tray assembly 120 includes a tray 121 and a clamping assembly 122, the clamping assembly 122 is arranged in the tray 121, the clamping assembly 122 includes at least two vertically placed heat transfer clamps 1220 arranged side by side, and a clamping space 1221 is formed between adjacent heat transfer clamps 1220; a convection channel 1222 is provided in the heat transfer clamp 1220, the thickness direction X of the heat transfer clamp 1220 is defined as a first direction, and a second direction is defined to intersect with the first direction, and the convection channel 1222 is arranged along the second direction and passes through the opposite ends of the heat transfer clamp 1220. The second direction is the height direction Y of the heat transfer clamp 1220, the convection channel 1222 extends in a straight line, and the extension direction of the convection channel 1222 is parallel to the second direction. The heat transfer clamp 1220 has a first side surface 12201 and a second side surface 12202 that are opposite to each other in the first direction, and the heat transfer clamp 1220 has a third side surface 12203 and a fourth side surface 12204 that are opposite to each other in the second direction, the third side surface 12203 and the fourth side surface 12204 are both adjacent to the first side surface 12201, the third side surface 12203 and the fourth side surface 12204 are both adjacent to the second side surface 12202, and the two ends of the convection channel 1222 pass through the third side surface 12203 and the fourth side surface 12204 respectively. The third direction is defined to intersect with both the first direction and the second direction, the third direction is the width direction Z of the heat transfer clamp 1220, and the convection channels 1222 are multiple and arranged side by side along the third direction. The volume of the plurality of convection channels 1222 in the heat transfer splint 1220 accounts for 10% to 80%. The surface of the heat transfer splint 1220 includes an outer surface and an inner surface, and the wall surface of the plurality of convection channels forms the inner surface of the heat transfer splint 1220, and the ratio of the area of ​​the inner surface to the total area of ​​the surface is 20% to 90%. The cross section of the convection channel 1222 is circular, triangular, rectangular or star-shaped; wherein the cross section of the convection channel 1222 is a cross section perpendicular to the extension direction of the convection channel 1222. The heat transfer splint 1220 is provided with a heat conductive layer 1223 on the surface facing the clamping space 1221 at least in the first direction. At least part of the bottom 1211 of the tray 121 is a hollow structure. The battery production equipment 100 also includes a heat exchange device 130, which is connected to the equipment box 110 and is used to input a hot air flow into the accommodating cavity 1100, thereby providing the above-mentioned specific temperature environment. The heat exchange device 130 includes a hot air blower, which is disposed outside the equipment box 110 , and an output end of the hot air blower is connected to the accommodating chamber 1100 through the bottom of the equipment box 110 .The battery production equipment 100 also includes a temperature sensor and a controller 140. The temperature sensor is used to detect the temperature in the accommodating chamber 1100. The controller 140 connects the temperature sensor and the heat exchange device 130. The controller 140 is used to adjust the heat exchange power of the heat exchange device 130 according to the temperature value detected by the temperature sensor.

[0177] In the above manner, the heat transfer clamp 1220 clamps and transfers heat to the battery cell 10, and a convection channel 1222 is provided inside the heat transfer clamp 1220, which can increase the heat exchange area of ​​the heat transfer clamp 1220, thereby improving the speed and consistency of the temperature rise of the battery cell 10.

[0178] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0179] 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 production equipment, characterized in that: include: The equipment box has a containing cavity for providing a specific temperature environment; A tray assembly is arranged in the accommodating cavity, the tray assembly comprises a tray and a clamping assembly, the clamping assembly is arranged in the tray, the clamping assembly comprises at least two vertically placed heat transfer clamping plates arranged side by side, and a clamping space is formed between adjacent heat transfer clamping plates; The heat transfer plate is provided with a convection channel, the thickness direction of the heat transfer plate is defined as a first direction, a second direction is defined to intersect with the first direction, and the convection channel is provided along the second direction and passes through opposite ends of the heat transfer plate.

2. The battery production equipment according to claim 1, characterized in that: The heat transfer clamp has a first side surface and a second side surface opposite to each other in the first direction, and the heat transfer clamp has a third side surface and a fourth side surface opposite to each other in the second direction, the third side surface and the fourth side surface are both adjacent to the first side surface, the third side surface and the fourth side surface are both adjacent to the second side surface, and both ends of the convection channel pass through the third side surface and the fourth side surface respectively.

3. The battery production equipment according to claim 1 or 2, characterized in that: A third direction is defined to intersect both the first direction and the second direction, and a plurality of convection channels are arranged side by side along the third direction.

4. The battery production equipment according to claim 3, characterized in that: The volume of the plurality of convection channels in the heat transfer clamping plate accounts for 10% to 80%.

5. The battery production equipment according to claim 4, characterized in that: The surface of the heat transfer clamp includes an outer surface and an inner surface, the walls of the plurality of convection channels form the inner surface, and the ratio of the area of ​​the inner surface to the total area of ​​the surface is 20% to 90%.

6. The battery production equipment according to claim 4, characterized in that: The cross section of the convection channel is circular, triangular, rectangular or star-shaped; wherein the cross section is a cross section perpendicular to the extension direction of the convection channel.

7. The battery production equipment according to claim 4, characterized in that: The convection channel extends in a straight line, a broken line and a curved line, or in a combination of at least two of the two.

8. The battery production equipment according to claim 3, characterized in that: The second direction is the height direction of the heat transfer clamping plate, the convection channel extends in a straight line, and the extension direction of the convection channel is parallel to the second direction.

9. The battery production equipment according to claim 1, characterized in that: The surface of the heat transfer clamping plate facing the clamping space at least in the first direction is provided with a heat conducting layer.

10. The battery production equipment according to claim 2, characterized in that: At least a portion of the bottom of the tray is a hollow structure.

11. The battery production equipment according to claim 1, characterized in that: The battery production equipment also includes: A heat exchange device is connected to the equipment box and is used to input hot air flow into the accommodating cavity to provide the specific temperature environment.

12. The battery production equipment according to claim 11, characterized in that: The heat exchange device comprises a hot air blower, which is arranged outside the equipment box, and the output end of the hot air blower is connected to the accommodating cavity through the bottom of the equipment box.

13. The battery production equipment according to claim 11, characterized in that: The battery production equipment also includes: A temperature sensor, used to detect the temperature in the accommodating cavity; A controller is connected to the temperature sensor and the heat exchange device, and the controller is used to adjust the heat exchange power of the heat exchange device according to the temperature value detected by the temperature sensor.

14. The battery production equipment according to claim 13, characterized in that: The tray assembly is provided in plurality along the second direction, and the second direction is the height direction of the heat transfer clamping plate; The equipment box includes a plurality of side walls, at least one of the side walls is provided with the temperature sensor, and a plurality of the temperature sensors are provided along the second direction, and one temperature sensor is provided corresponding to at least one tray assembly; The heat exchange device includes a plurality of hot air blowers arranged along the second direction, the output ends of the hot air blowers are connected to the accommodating cavity, and one output end of the hot air blower is arranged corresponding to one temperature sensor.

15. A battery production system, characterized in that: The battery production system comprises the battery production equipment according to any one of claims 1-14.

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