Battery tray constant pressure equipment

Abstract

A battery tray constant pressure device comprises a battery tray, and the rear end of the battery tray is connected with a tray constant pressure mechanism. The battery tray comprises a tray bottom frame; a front fixing plate and a rear fixing plate are respectively arranged at the front and rear ends of the tray bottom frame; a plurality of tray inner lining plates capable of sliding front and back are arranged between the front fixing plate and the rear fixing plate, batteries are clamped between the front and back adjacent tray inner lining plates, and the batteries are connected with an external charging and discharging mechanism; a push plate is arranged on the tray lining plate at the rearmost end, and a trapezoid nut and a restraining hole are arranged on the rear fixing plate. A lead screw penetrates through the trapezoidal nut and abuts against the push disc, and four restraining guide shafts penetrate through the restraining holes. The front end of the restraint guide shaft is connected with the push plate, the rear end of the restraint guide shaft is connected with an electric cylinder through a pressure sensor capable of feeding back pressure to the upper computer, the electric cylinder can stretch back and forth through feedback of the upper computer, force applied to the push plate by the restraint guide shaft is changed, and then the pressure borne by the battery during charging and discharging expansion is constant.

Description

Technical Field

[0001] The invention relates to the field of battery manufacturing, and in particular to a battery tray constant pressure device used for battery formation. Background Art

[0002] During the battery charging and discharging process, the battery needs to be charged and discharged to adjust and test the battery performance. This process is also called battery charging and discharging. In the charging and discharging process, a constant pressure mechanism is generally used to separate the battery through multiple partitions. Before placing the battery, the partitions are separated by a certain distance. After the battery is placed between adjacent partitions, pressure is applied to bring the partitions closer to each other, thereby constraining the battery and implementing charging and discharging. However, the applied pressure is usually large, for example, several tons of pressure is required. However, during the high-power and high-energy charging and discharging process, the internal electrolyte of the battery will react chemically under the influence of the current, and the battery shell will expand or contract under the influence of the internal temperature rise environment. Once the pressure is set or the expansion is huge, the battery quality will be damaged and feedback cannot be given in time.

[0003] In order to ensure the safety of lithium batteries during charging and discharging and improve production line efficiency and output value, it is necessary not only to keep the pressure on the battery surface of the restraint tray uniform, but also to control the pressure value on the battery surface to be constant in real time according to the expansion or contraction deformation of the battery. Through servo control and PID control, the pressure can be displayed on the central control screen and real-time feedback alarm can be given. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a battery tray constant pressure device, whose design concept is to provide real-time feedback of the pressure exerted on the battery through a restraint guide shaft and a pressure sensor that indirectly contacts the battery, and to move the restraint guide shaft according to the feedback through an electric cylinder, so as to keep the pressure exerted on the battery constant.

[0005] The battery tray constant pressure device of the present invention comprises a battery tray 6, the rear end of the battery tray 6 is connected to a tray constant pressure mechanism 5; the tray constant pressure mechanism 5 applies a constant pressure to the batteries in the battery tray 6;

[0006] The battery tray 6 comprises 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; the front fixing plate 600 is parallel to the rear fixing plate 607, and is connected by a longitudinal lining guide shaft 608; a plurality of tray lining plates 611 are longitudinally slidably provided on the lining guide shaft 608 through a card slot 609; a station for clamping batteries is reserved between adjacent tray lining plates 611;

[0007] A push plate 604 is provided at the rear end of the tray inner lining plate 611 closest to the rear fixing plate 604, and a trapezoidal nut 605 and a restraining hole 610 are provided on the rear fixing plate 607; a longitudinal screw rod 606 passes through the trapezoidal nut 605 and contacts the push plate 604, and the screw rod 606 can move longitudinally and push the push plate 604 by rotating in the trapezoidal nut 605; a tray clamp 602 that can be laterally docked with an external probe mechanism is provided at the top of the card slot, and battery poles 601 are provided at both ends of the battery in the horizontal direction;

[0008] The restraint holes 610 are respectively penetrated with longitudinal restraints 500 belonging to the tray constant pressure mechanism 5, and the restraints 500 include a restraint guide shaft 5001, the front end of the restraint guide shaft 5001 is connected to the push plate 604, and the rear end is sequentially connected to a slider fixing plate 502 through a reinforcing plate 5002, a pressure sensor 5004 and a connecting block 5003, the slider fixing plate 502 is connected to an electric cylinder 501 that can be pushed forward and backward, and the electric cylinder 501 is connected to an external mechanism; the slider fixing plate 502 is connected to the external mechanism through the electric cylinder fixing plate 503;

[0009] The pressure sensor 5004 and the electric cylinder 501 are connected to an external host computer. The electric cylinder 501 can expand and contract according to the pressure feedback from the pressure sensor 5004 to adjust the force applied by the restraint guide shaft 5001 to the push plate 604 .

[0010] More specifically, the number of the restraining holes 610 and the number of the restraining guide shafts 5001 are both four.

[0011] When the battery tray 6 is docked with the restraint 500 during the charging and discharging process: the electric cylinder 501 evenly distributes the thrust to the four restraint guide shafts 5001 through the connecting block 5003, and the four restraint guide shafts 5001 then disperse the force to the push plate 604. The pressure sensor 5004 monitors the pressure on the battery in real time, and then uses the electric cylinder 501 to adjust the pressure applied to the push plate 604 to ensure that the battery remains stable after charging and expansion.

[0012] The technical effect of the present invention is that it solves the defect that the common charging and discharging separators apply uneven pressure to the battery, causing battery deformation. On the other hand, it performs real-time adjustment control and feedback on the pressure changes caused by the expansion and contraction of the battery during charging and discharging, realizes a digital closed loop and controllable, greatly improves the safety of the battery, and greatly improves the production capacity and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a battery tray constant pressure device of the present invention.

[0014] Figure 2 It is a structural diagram of the battery tray of the present invention.

[0015] Figure 3It is a structural schematic diagram of the constant pressure mechanism assembly of the present invention.

[0016] Figure 4 It is a schematic diagram of the structure of the restraint guide shaft component of the present invention. DETAILED DESCRIPTION

[0017] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0018] In the description of the present invention, it is to be understood that the 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., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention 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 limiting the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "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 one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0023] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0024] The tray bottom frame 603 comprises 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 is connected by a longitudinal lining guide shaft 608; a plurality of tray lining plates 611 are longitudinally slidably arranged on the lining guide shaft 608 through a card slot 609; a station for clamping batteries is reserved between adjacent tray lining plates 611;

[0025] A push plate 604 is provided on the tray inner lining 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 longitudinal screw rod 606 passes through the trapezoidal nut 605 and contacts the push plate 604, and the screw rod 606 can move longitudinally and push the push plate 604 by rotating in the trapezoidal nut 605; a tray clamp 602 that can be laterally connected to an external probe mechanism is provided on the top of the clamping slot 609, and battery poles 601 are provided at both ends of the battery in the horizontal direction;

[0026] The rear end of the battery tray 6 is connected to the tray constant pressure mechanism 5. The function of the tray constant pressure mechanism 5 is to use constant pressure to press the battery clamped between the tray inner lining plates 611, so as to ensure the stability of the charging and discharging process. The tray constant pressure mechanism 5 includes a restrainer 500. The restrainer 500 includes a restraint guide shaft 5001. The front end of the restraint guide shaft 5001 is connected to the push plate 604, and the rear end is connected to a slider fixing plate 502 through a reinforcing plate 5002, a pressure sensor 5004 and a connecting block 5003 in sequence. The slider fixing plate 502 is connected to an electric cylinder 501, and the electric cylinder 501 is connected to an external mechanism; the slider fixing plate 502 is connected to an external mechanism through the electric cylinder fixing plate 503;

[0027] The pressure sensor 5004 and the electric cylinder 501 are connected to an external host computer. The electric cylinder 501 can expand and contract according to the pressure feedback from the pressure sensor 5004 to adjust the force applied by the restraint guide shaft 5001 to the push plate 604 .

[0028] When the battery tray 6 is docked with the restraint 500 during the charging and discharging process: the electric cylinder 501 evenly distributes the thrust to the four restraint guide shafts 5001 through the connecting block 5003, and the four restraint guide shafts 5001 then disperse the force to the push plate 604; the pressure condition of the battery is monitored in real time through the pressure sensor 5004, and then the pressure applied to the push plate 604 is adjusted by the electric cylinder 501 to ensure that the battery remains stable under pressure after charging and expansion.

[0029] The combination of the battery tray 6 and the restraint guide shaft 5001 realizes the expansion of the battery in the restrained state, so that the probe connected to the battery pole 601 moves along with the expansion of the battery; the electric cylinder 501 pushes the restraint guide shaft 5001 to adjust the pressure of the battery in real time according to the feedback of the pressure sensor 5004, thereby preventing the battery from being damaged and affecting the battery charging and discharging performance due to the expansion of the battery thickness during the charging and discharging process, and preventing indentations on the battery appearance.

[0030] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A battery tray constant pressure device, characterized in that: It comprises a battery tray (6), the rear end of the battery tray (6) is connected to a tray constant pressure mechanism (5); the tray constant pressure mechanism (5) applies a constant pressure to the batteries in the battery tray (6); The battery tray (6) comprises a rectangular tray bottom frame (603), wherein 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; the front fixing plate (600) is parallel to the rear fixing plate (607), and is connected via a longitudinal lining guide shaft (608); a plurality of tray lining plates (611) are longitudinally slidably arranged on the lining guide shaft (608) via a card slot (609); a station for clamping batteries is reserved between adjacent tray lining plates (611); A push plate (604) is provided at the rear end of the tray inner lining 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 longitudinal screw rod (606) passes through the trapezoidal nut (605) and contacts the push plate (604); a tray clamp (611) capable of docking with an external probe mechanism in a horizontal direction is provided at the top of the clamping slot (609), and battery poles (601) are provided at both ends of the battery in a horizontal direction; The restraint holes (610) are respectively provided with longitudinal restraints (500) belonging to the tray constant pressure mechanism (5), the restraints (500) comprising a restraint guide shaft (5001), the front end of the restraint guide shaft (5001) being connected to a push plate (604), and the rear end being connected to a slider fixing plate (502) through a reinforcing plate (5002), a pressure sensor (5004) and a connecting block (5003) in sequence, the slider fixing plate (502) being connected to an electric cylinder (501) that can be pushed forward and backward, and the electric cylinder (501) being connected to an external mechanism; the slider fixing plate (502) is connected to an external mechanism through the electric cylinder fixing plate (503); The pressure sensor (5004) and the electric cylinder (501) are connected to an external host computer. The electric cylinder (501) can adjust the force applied by the restraining guide shaft (5001) to the push plate (604) by means of pressure expansion and contraction fed back by the pressure sensor (5004).

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

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