Battery tray constant pressure equipment

Abstract

To provide a battery tray constant pressure facility that ensures safety of a lithium battery in a charging and discharging process and increases efficiency and production amount of a production line.SOLUTION: A battery tray constant pressure facility includes one battery tray 6, and a rear end of the battery tray is connected to a tray constant pressure mechanism 5. The battery tray includes a tray bottom frame 603, a front fixing plate 600 and a rear fixing plate are provided at both front and rear ends of the tray bottom frame, and some tray liner plates slidable in front and rear directions are arranged between the front fixing plate and the rear fixing plate. A battery is sandwiched between the tray liner plates adjacent in the front and rear directions. The battery is connected to an external charging / discharging mechanism, a pusher is provided on the tray liner plate at the rearmost end, and one electric cylinder is connected to the rear end via a pressure sensor. The electric cylinder expands and contracts forward and backward by feedback of a host machine, and a force applied to the pusher by a restraining guide shaft is changed, so that the pressure received when the battery expands due to charging / discharging can be made constant.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the field of battery manufacturing, and particularly to a battery tray constant pressure device used for battery formation.

Background Art

[0002] In the charging and discharging process of a battery, it is necessary to charge and discharge the battery to adjust and test the battery performance, and this process is also called the capacity charging and discharging of the battery. In the capacity charging and discharging process, the commonly used constant pressure mechanism partitions the batteries by a plurality of separators. Before the batteries are inserted, the separators are separated from each other by a certain distance. After the batteries are inserted between adjacent separators, by applying pressure, the separators are brought closer to each other, thereby restraining the batteries to perform charging and discharging. However, the pressure to be applied is usually quite large, for example, it requires a pressure of several tons. However, in the high-power and high-energy charging and discharging process of the battery, the internal electrolyte undergoes a chemical reaction under the influence of the current, and due to the influence of the internal temperature rise environment, expansion or contraction may occur in the battery case. If the pressure is fixed or the expansion amount is huge, the quality of the battery will be damaged and it cannot be timely feedback.

[0003] In order to ensure the safety of the lithium battery during the charging and discharging process and improve the efficiency and production value of the production line, not only must the pressure on the battery surface of the restraint tray be uniform, but also in response to the expansion or contraction deformation of the battery, the pressure value on the battery surface is controlled in real time to be constant, and by adding PID to the servo control for control, the pressure can be displayed on the central control panel and an alarm must be fed back in real time.

Summary of the Invention

[0004] To solve the above problems, the present invention presents a battery tray constant pressure device. Its design concept involves indirectly contacting the battery's restraint guide shaft with a pressure sensor to provide real-time feedback on the pressure the battery receives, and then moving the restraint guide shaft based on the feedback via an electric cylinder to maintain a constant pressure on the battery.

[0005] The battery tray constant pressure system of the present invention includes one battery tray 6, and a tray constant pressure mechanism 5 is connected to the rear end of the battery tray 6, and the tray constant pressure mechanism 5 applies a constant pressure to the batteries in the battery tray 6. The battery tray 6 includes a rectangular tray bottom frame 603, the front end of which is provided with a vertical front fixing plate 600, and the rear end of which is provided with a vertical rear fixing plate 607. The front fixing plate 600 is parallel to the rear fixing plate 607 and connected via a vertical liner guide shaft 608. Several tray liner plates 611 are provided so as to be slidable vertically on the liner guide shaft 608 via slots 609, and working positions for holding batteries are left between adjacent tray liner plates 611. A pusher 604 is provided at the rear end of the tray liner plate 611 closest to the rear fixing plate 607, a trapezoidal nut 605 and a restraining hole 610 are provided on the rear fixing plate 607, a vertical screw 606 passes through the trapezoidal nut 605 and contacts the pusher 604, the screw 606 moves vertically by rotating within the trapezoidal nut 605 and can push the pusher 604, a tray head 602 which can dock with an external probe mechanism in the lateral direction is provided at the top of the slot, and battery poles 601 are provided at both ends of the battery in the lateral direction. A vertical restraint device 500 belonging to the tray constant pressure mechanism 5 is installed through each restraint hole 610. The restraint device 500 includes a restraint guide shaft 5001, the front end of which is connected to a pusher 604, and the rear end of which is connected to a slider fixing plate 502, passing through a reinforcing plate 5002, a pressure sensor 5004, and a connecting block 5003 in that order. The slider fixing plate 502 is connected to an electric cylinder 501 that can be propelled forward and backward, the electric cylinder 501 is connected to an external mechanism, and the slider fixing plate 502 is connected to the external mechanism via an electric cylinder fixing plate 503. The pressure sensor 5004 and the electric cylinder 501 are connected to an external higher-level machine, and the electric cylinder 501 expands and contracts in response to the pressure feedback from the pressure sensor 5004, allowing the restraining guide shaft 5001 to adjust the force applied to the pusher 604.

[0006] More specifically, the number of restraint holes 610 and restraint guide shafts 5001 are both four.

[0007] When the battery tray 6 docks with the restraint 500 during the charging and discharging process, the electric cylinder 501 evenly distributes the thrust across the four restraint guide shafts 5001 via the connecting block 5003, and the four restraint guide shafts 5001 then distribute the force across the pusher 604. The pressure sensor 5004 monitors the battery's pressure status in real time, and the electric cylinder 501 adjusts the pressure applied to the pusher 604, ensuring that the pressure remains stable even if the battery expands due to charging.

[0008] The technical advantages of this invention are that it solves a common defect in batteries where the charge / discharge separator applies uneven pressure, causing deformation, while simultaneously achieving digital closed-loop and controllable operation by providing real-time adjustment control and feedback to pressure changes caused by expansion and contraction during the battery's charging and discharging process. This significantly improves battery safety and greatly enhances production capacity and efficiency. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic diagram of the structure of the battery tray constant pressure equipment of the present invention. [Figure 2] Figure 2 is a structural diagram of the battery tray of the present invention. [Figure 3] Figure 3 is a schematic diagram of the structure of the constant pressure mechanism assembly of the present invention. [Figure 4] Figure 4 is a schematic diagram of the structure of the restraining guide shaft member of the present invention. [Modes for carrying out the invention]

[0010] The following sections provide a detailed description of specific embodiments of the present invention, accompanied by the drawings. It should be understood that these specific embodiments are intended solely to illustrate and interpret the embodiments of the present invention, and are not intended to limit them.

[0011] It is important to understand in describing the present invention that the directions or positional relationships indicated by terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "perpendicular," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the directions or positional relationships shown in the figures and are merely used to make the description of the present invention easier to understand and to simplify the description. They do not indicate or imply that the devices or elements being referred to must necessarily have a specific direction or must be configured and operated in a specific direction, and therefore cannot be understood as limitations on the present invention.

[0012] Furthermore, the terms "first" and "second" are used solely to describe the purpose and should not be understood as indicating or suggesting relative importance, or implicitly indicating the number of technical features being referred to. Thus, features designated as "first" and "second" may, explicitly or implicitly, include at least one such feature. In the description of this invention, "multiple" means at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0013] In this invention, unless otherwise explicitly defined and limited, terms such as "attachment," "connection," "bonding," and "fixing" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integrated connection, a mechanical connection, an electrical connection, mutual communication, and unless otherwise explicitly limited, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction relationship between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in this invention depending on the specific situation.

[0014] In the present invention, unless otherwise explicitly stated and limited, when the first feature is "above" or "below" the second feature, the first and second features may be in direct contact, or they may be indirectly in contact via an intermediate medium. Furthermore, when the first feature is "above," "above," or "on the top surface" of the second feature, the first feature may be directly above or diagonally above the second feature, or it may simply indicate that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "below," "below," or "on the bottom surface" of the second feature, the first feature may be directly below or diagonally below the second feature, or it may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0015] In this specification, any reference to the terms “one example,” “several examples,” “illustration,” “specific example,” or “several examples” means that the specific features, structures, materials, or characteristics described in the example or example are included in at least one example or example of the present invention. In this specification, the general expressions of the above terms do not necessarily have to refer to the same example or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in an appropriate manner within one or more examples or examples. Also, in non-contradictory circumstances, a person skilled in the art can combine or link different examples or examples and features of different examples or examples described herein.

[0016] The present invention will be described in detail below with reference to the drawings and in conjunction with exemplary embodiments.

[0017] The tray includes a rectangular tray bottom frame 603, the front end of which is provided with a vertical front fixing plate 600, and the rear end of which is provided with a vertical rear fixing plate 607, the front fixing plate 600 being parallel to the rear fixing plate 607 and connected via a vertical liner guide shaft 608, and several tray liner plates 611 being provided so as to be slidable vertically on the liner guide shaft 608 via slots 609, with working positions remaining between adjacent tray liner plates 611 for holding batteries. A pusher 604 is provided on the tray liner plate 611 closest to the rear fixing plate 607, and a trapezoidal nut 605 and a restraining hole 610 are provided on the rear fixing plate 607. A vertical screw 606 passes through the trapezoidal nut 605 and contacts the pusher 604, and the screw 606 moves vertically by rotating within the trapezoidal nut 605, allowing it to push the pusher 604. A tray head 602 is provided at the top of the slot 609, which can dock with an external probe mechanism in the lateral direction, and battery poles 601 are provided at both ends of the battery in the lateral direction. A tray constant pressure mechanism 5 is connected to the rear end of the battery tray 6. The role of the tray constant pressure mechanism 5 is to ensure stability during the charging and discharging process by applying constant pressure to compress the batteries sandwiched between the tray liner plates 611. The tray constant pressure mechanism 5 includes a restrainer 500, which includes a restrainer guide shaft 5001. The front end of the restrainer guide shaft 5001 is connected to a pusher 604, and its rear end is connected to a slider fixing plate 502, passing through a reinforcing plate 5002, a pressure sensor 5004, and a connecting block 5003 in that order. The slider fixing plate 502 is connected to an electric cylinder 501, which is connected to an external mechanism, and the slider fixing plate 502 is connected to the external mechanism via an electric cylinder fixing plate 503. The pressure sensor 5004 and the electric cylinder 501 are connected to an external higher-level machine, and the electric cylinder 501 expands and contracts in response to the pressure feedback from the pressure sensor 5004, allowing the restraining guide shaft 5001 to adjust the force applied to the pusher 604.

[0018] When the battery tray 6 docks with the restraint 500 during the charging and discharging process, the electric cylinder 501 evenly distributes the thrust across the four restraint guide shafts 5001 via the connecting block 5003, and then the four restraint guide shafts 5001 distribute the force onto the pusher 604. The pressure sensor 5004 monitors the battery's pressure status in real time, and the electric cylinder 501 adjusts the pressure applied to the pusher 604, ensuring that the pressure remains stable even if the battery expands due to charging.

[0019] By combining the battery tray 6 and the restraint guide shaft 5001, in a restrained state, the probe connected to the battery electrode column 601 is made to follow the expansion of the battery due to the expansion of the battery. The electric cylinder 501 pushes the restraint guide shaft 5001 in response to feedback from the pressure sensor 5004 to adjust the battery pressure in real time, thereby preventing damage to the battery due to expansion of the battery's thickness during the charging and discharging process, which would affect the battery's charging and discharging performance, and preventing indentations from appearing on the battery's exterior.

[0020] As described above, examples of the present invention have been shown and explained. However, these examples are illustrative and should not be understood as limitations on the present invention. Those skilled in the art will understand that changes, modifications, substitutions, and variations can be made to the above examples within the scope of the present invention.

Claims

1. In a battery tray constant pressure system, one battery tray (6) is included, and a tray constant pressure mechanism (5) is connected to the rear end of the battery tray (6). The tray constant pressure mechanism (5) applies a constant pressure to the batteries in the battery tray (6). The battery tray (6) includes a rectangular tray bottom frame (603), the front end of which is provided with a vertical front fixing plate (600), and the rear end of which is provided with a vertical rear fixing plate (607), the front fixing plate (600) and the rear fixing plate (607) being parallel and connected via a vertical liner guide shaft (608), and some tray liner plates (611) being provided so as to be slidable vertically on the liner guide shaft (608) via slots (609), with working positions remaining between adjacent tray liner plates (611) for holding batteries. A pusher (604) is provided at the rear end of the tray liner plate (611) closest to the rear fixing plate (607), a trapezoidal nut (605) and a restraining hole (610) are provided on the rear fixing plate (607), a vertical screw (606) passes through the trapezoidal nut (605) and contacts the pusher (604), a tray head (602) that can dock with an external probe mechanism in the lateral direction is provided at the top of the slot (609), and battery poles (601) are provided at both ends of the battery in the lateral direction. A vertical restraint (500) belonging to the tray constant pressure mechanism (5) is installed through each of the restraint holes (610), and each restraint (500) includes a restraint guide shaft (5001), the front end of which is connected to a pusher (604), and the rear end of which is connected to a slider fixing plate (502) passing through a reinforcing plate (5002), a pressure sensor (5004), and a connecting block (5003) in that order, the slider fixing plate (502) is connected to an electric cylinder (501) that is connected to an external mechanism and can be propelled back and forth, and the slider fixing plate (502) is connected to the external mechanism via an electric cylinder fixing plate (503). The pressure sensor (5004) and the electric cylinder (501) are connected to an external higher-level machine, and the electric cylinder (501) expands and contracts in response to the pressure feedback from the pressure sensor (5004), and the force applied by the restraining guide shaft (5001) to the pusher (604) can be adjusted. Battery tray constant pressure equipment.

2. The battery tray constant pressure device according to claim 1, characterized in that the number of restraint holes (610) and restraint guide shafts (5001) are both four.

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