Battery tray constant pressure facility

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 more particularly to a battery tray constant pressure equipment used in battery chemical formation. [Background technology]

[0002] During the charge and discharge process of a battery, the battery must be charged and discharged to adjust and test its performance. This process is also known as capacity charging and discharging. In the capacity charging and discharging process, a commonly used constant pressure mechanism separates the battery using multiple separators. Before the battery is inserted, the separators are spaced a certain distance from each other. After the battery is inserted between adjacent separators, pressure is applied to bring the separators closer together, thereby constraining the battery for charging and discharging. However, the applied pressure is usually quite large, e.g., several tons. During high-power and high-energy charging and discharging, the internal electrolyte undergoes chemical reactions under the influence of current, and the battery case may expand or contract due to the internal temperature rise. If the pressure is fixed or the expansion amount is large, the battery quality will be damaged and timely feedback will be impossible.

[0003] To ensure safety during the charging and discharging process of lithium batteries and to increase the efficiency and output of the production line, not only must the pressure of the restraining tray on the battery surface be uniform, but the pressure on the battery surface must be controlled in real time to maintain a constant value according to the expansion or contraction deformation of the battery, and PID must be added to servo control to display the pressure on the central control panel and provide real-time alarm feedback. Summary of the Invention

[0004] To solve the above problems, the present invention proposes a battery tray constant pressure device. The design concept is to provide real-time feedback on the pressure experienced by the battery by indirectly contacting the battery restraint guide shaft with a pressure sensor, and to move the restraint guide shaft based on the feedback via an electric cylinder, thereby maintaining a constant pressure experienced by the battery.

[0005] The battery tray constant pressure device 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, a vertical front fixing plate 600 is provided at the front end of the tray bottom frame 603, and a vertical rear fixing plate 607 is provided at the rear end thereof. The front fixing plate 600 is parallel to the rear fixing plate 607 and is connected to the rear fixing plate 607 via a vertical liner guide shaft 608. A number of tray liner plates 611 are provided on the liner guide shaft 608 via slots 609 so as to be slidable in the vertical direction. Working positions for clamping 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 that can be docked with an external probe mechanism is provided at the top of the slot in the horizontal direction, and battery poles 601 are provided at both ends of the battery in the horizontal direction. The restraining holes 610 are respectively provided with longitudinal restraining devices 500 belonging to the tray constant pressure mechanism 5, each of which includes a restraining guide shaft 5001. The front end of the restraining guide shaft 5001 is connected to the pusher 604, and the rear end thereof is connected to a slider fixing plate 502 via a reinforcing plate 5002, a pressure sensor 5004, and a connection block 5003 in this order. The slider fixing plate 502 is connected to an electric cylinder 501 that can move back and forth. 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 host machine, and the electric cylinder 501 expands and contracts according to the pressure fed back by the pressure sensor 5004, thereby adjusting the force that the restraining guide shaft 5001 applies to the pusher 604.

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

[0007] When the battery tray 6 is docked with the restraint device 500 during charging or discharging, the electric cylinder 501 divides the thrust force equally among the four restraint guide shafts 5001 through the connection block 5003, and the four restraint guide shafts 5001 then distribute the force among the pushers 604. The pressure sensor 5004 monitors the pressure-receiving status of the battery in real time, and the electric cylinder 501 is further used to adjust the pressure applied to the pushers 604, ensuring that the pressure received remains stable even when the battery expands due to charging.

[0008] The technical effect of the present invention is to solve the common defect of battery deformation due to uneven pressure applied by the separator during charging and discharging, while real-time adjustment control and feedback is performed for pressure changes caused by expansion and contraction during the battery charging and discharging process, thereby realizing digital closed-loop and controllability, greatly improving battery safety and greatly improving production capacity and efficiency. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a structural schematic diagram of the battery tray constant pressure equipment of the present invention. [Figure 2] FIG. 2 is a structural diagram of a battery tray according to the present invention. [Figure 3] FIG. 3 is a structural schematic diagram of the constant pressure mechanism assembly of the present invention. [Figure 4] FIG. 4 is a structural schematic diagram of the restraint guide shaft member of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] In the following, specific embodiments of the present invention will be described in detail in conjunction with the drawings. It should be understood that the specific embodiments described herein are merely for the purpose of explaining and interpreting the present invention, and are not intended to limit the present invention.

[0011] In describing the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of the present invention, and do not represent or imply that the devices or elements referred to necessarily have a particular orientation or must be constructed or operated in a particular orientation, and therefore should not be understood as limitations on the present invention.

[0012] Furthermore, the terms "first" and "second" are used for descriptive purposes only and cannot be understood to indicate or imply relative importance or the number of technical features being referred to. Thus, a feature qualified as "first" or "second" can explicitly or implicitly include at least one of that feature. In describing the present invention, "plurality" means at least two, e.g., two, three, etc., unless otherwise clearly and specifically limited.

[0013] In the present invention, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, or mutual communication, and, unless otherwise clearly limited, may refer to a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0014] In the present invention, unless otherwise clearly specified or limited, when a first feature is "above" or "below" a second feature, the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate medium. Furthermore, when a first feature is "above," "upper," or "on the upper surface" of a second feature, the first feature may be directly above or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. When a first feature is "below," "below," or "on the lower surface" of a second feature, the first feature may be directly below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0015] In the description herein, references to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in the embodiment or example are included in at least one embodiment or example of the present invention in association with the specific features, structures, materials, or characteristics described in the embodiment or example. In the description herein, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in an appropriate manner in one or more embodiments or examples. Furthermore, in situations where they are not mutually inconsistent, those skilled in the art may combine or combine different embodiments or examples described herein and features of different embodiments or examples.

[0016] The invention will now be described in detail in connection with exemplary embodiments with reference to the drawings.

[0017] The tray bottom frame 603 has a rectangular shape, a vertical front fixing plate 600 at the front end thereof, and a vertical rear fixing plate 607 at the rear end thereof. The front fixing plate 600 is parallel to the rear fixing plate 607 and is connected to the rear fixing plate 607 via a vertical liner guide shaft 608. A number of tray liner plates 611 are provided on the liner guide shaft 608 via slots 609 so as to be vertically slidable, and working positions for clamping batteries are left between adjacent tray liner plates 611. A pusher 604 is provided on 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 that can be docked with an external probe mechanism in the horizontal direction is provided at the top of the slot 609, and battery poles 601 are provided at both ends of the battery in the horizontal direction, A tray constant pressure mechanism 5 is connected to the rear end of the battery tray 6, and the role of the tray constant pressure mechanism 5 is to apply a constant pressure to the batteries sandwiched between the tray liner plates 611, thereby ensuring stability during the charging and discharging process. The tray constant pressure mechanism 5 includes a restraint 500, which 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 via a reinforcing plate 5002, a pressure sensor 5004, and a connection block 5003 in this order. The slider fixing plate 502 is connected to an electric cylinder 501, 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 host machine, and the electric cylinder 501 expands and contracts according to the pressure fed back by the pressure sensor 5004, thereby adjusting the force that the restraining guide shaft 5001 applies to the pusher 604.

[0018] When the battery tray 6 is docked with the restraint device 500 during charging or discharging, the electric cylinder 501 divides the thrust force equally among the four restraint guide shafts 5001 through the connection block 5003, and the four restraint guide shafts 5001 then distribute the force among the pushers 604. The pressure sensor 5004 monitors the pressure-receiving status of the battery in real time, and the electric cylinder 501 adjusts the pressure applied to the pushers 604, ensuring that the pressure received remains stable even if the battery expands due to charging.

[0019] By combining the battery tray 6 with the restraining guide shaft 5001, when the battery expands in the restrained state, the probe connected to the battery pole 601 can follow the expansion of the battery. The electric cylinder 501 pushes and moves the restraining guide shaft 5001 based on feedback from the pressure sensor 5004, adjusting the battery pressure in real time. This prevents the battery from being damaged due to expansion of the battery thickness during the charging and discharging process, which would affect the battery's charging and discharging performance, and prevents indentations from appearing on the battery's exterior.

[0020] As mentioned above, although the embodiments of the present invention have been shown and described, the above embodiments are illustrative and should not be understood as limitations on the present invention, and it will be understood that those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. The battery tray constant pressure device 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 battery in the battery tray (6); The battery tray (6) includes a rectangular tray bottom frame (603), a vertical front fixing plate (600) is provided at the front end of the tray bottom frame (603), and a vertical rear fixing plate (607) is provided at the rear end thereof, the front fixing plate (600) and the rear fixing plate (607) are parallel to each other and connected via a vertical liner guide shaft (608), some tray liner plates (611) are provided on the liner guide shaft (608) via slots (609) so as to be vertically slidable, and working positions for clamping 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), a tray head (602) that can be docked with an external probe mechanism in the horizontal direction is provided at the top of the slot (609), and battery poles (601) are provided at both ends of the battery in the horizontal direction. The restraining holes (610) are respectively provided with vertical restraining devices (500) belonging to the tray constant pressure mechanism (5), and the restraining devices (500) include a restraining guide shaft (5001), the front end of which is connected to the pusher (604), and the rear end of which is connected to a slider fixing plate (502) through a reinforcing plate (5002), a pressure sensor (5004) and a connection block (5003) in this order, and the slider fixing plate (502) is connected to an electric cylinder (501) which can move back and forth and is connected to an external mechanism, and the slider fixing plate (502) is connected to the external mechanism through an electric cylinder fixing plate (503). The pressure sensor (5004) and the electric cylinder (501) are connected to an external host machine, and the electric cylinder (501) expands and contracts according to the pressure fed back by the pressure sensor (5004), thereby adjusting the force applied by the restraining guide shaft (5001) to the pusher (604). Battery tray constant pressure equipment.

2. 2. The battery tray constant pressure device according to claim 1, wherein the number of the restraining holes (610) and the number of the restraining guide shafts (5001) are four.

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