Automatic adjustment device for battery expansion in constant pressure mechanisms

Abstract

To provide an automatic adjustment device that controls a pressure value on the surface of a battery to be constant in real time in order to guarantee the safety during a charging and discharging process of a lithium battery and enhance the efficiency and output of a production line.SOLUTION: An automatic adjustment device in response to battery expansion in a constant pressure mechanism includes a constant pressure tray assembly 1 and a constant pressure mechanism assembly 2. The constant pressure tray assembly mainly consists of a front fixing plate, a tray liner plate, a tray push plate, a trapezoid nut, a screw, a rear fixing plate, and a liner guide shaft, and the constant pressure mechanism assembly mainly consists of a first electric cylinder output shaft, a pressure sensor, a connection plate, a servo electric cylinder, and a second electric cylinder output shaft. The pressure sensor is used to monitor the pressure received by the battery in real time, and adjusts the pressure received by the battery through the servo electric cylinder in real time to ensure that the pressure received by the battery is constant after the battery expands.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention belongs to the technical field of battery manufacturing, and specifically relates to an automatic adjustment device for the expansion of a battery with a constant pressure mechanism.

Background Art

[0002] The charge and discharge of lithium batteries is an important process in lithium battery processing. In the charge and discharge process, a general constant pressure mechanism partitions the battery with a plurality of separators. Before inserting the battery, the separators are separated from each other by a certain distance, and then the battery is inserted between adjacent separators, and pressure is applied to make the separators approach each other and restrain the battery. However, the pressure applied in such a manner is usually quite large, for example, several tons of pressure is required. In the high-power and high-energy charge and discharge process of the battery, the internal electrolyte is affected by the current and generates a chemical reaction, and the outer surface battery case expands or contracts under the influence of the internal temperature rise environment, which may cause the charge and discharge of the battery to become uneven. Once the pressure drops or the expansion amount becomes huge, a situation where the safety performance of the battery cannot be controlled and feedback cannot be provided may occur.

[0003] In order to ensure the safety of the lithium battery during the charge and discharge process and improve the efficiency and production value of the production line, not only the surface pressure of the battery on the restraint tray needs to be uniform, but also based on the expansion or contraction deformation of the battery, it is necessary to control the pressure value on the battery surface to be constant in real time. An automatic adjustment device that realizes displaying the pressure on the central control panel and feeding back an alert in real time by performing control through servo control and PID is urgently needed.

Summary of the Invention

[0004] To solve the above technical problems, the present invention presents an automatic adjustment device for battery expansion in a constant-pressure mechanism. This solves the problem of battery deformation due to uneven pressure, while simultaneously performing real-time adjustment control and feedback in response to pressure changes caused by expansion and contraction during the battery charging and discharging process. This achieves a digital closed-loop and controllable system, significantly improving battery safety and greatly increasing production capacity and efficiency. In order to solve the technical problems, the present invention employs the following technical methods. An automatic adjustment device for battery expansion in a constant pressure mechanism, the features of which are as follows: It includes a constant pressure tray assembly (1) and a constant pressure mechanism assembly (2), of which,

[0005] The constant pressure tray assembly (1) includes a horizontally installed tray bottom frame (103), the extension direction of the long side of the tray bottom frame (103) is defined as the front-to-back direction, and the extension direction of the short side of the tray bottom frame (103) is defined as the left-to-right direction. A front fixing plate (100) and a rear fixing plate (107) are installed on the front and rear of the tray bottom frame (103), respectively. A few liner guide shafts (108) are installed between the ends of the front fixing plate (100) and the rear fixing plate (107) at intervals from top to bottom. The front fixing plate (100), the rear fixing plate (107), and the few liner guide shafts (108) jointly surround and form a tray frame. Inside the tray frame, a few tray liner plates (102) are installed horizontally at intervals along the left-to-right direction. The tray liner plates (102) can move back and forth along the liner guide shafts (108), and the part adjacent to the rear fixing plate (107) A tray press plate (104) is installed inside the tray liner plate (102), and a battery (101) is placed inside the other tray liner plate (102). A trapezoidal nut (105) is horizontally mounted at the center of the rear fixing plate (107). One end of a screw (106) is connected to the tray press plate (104), and the other end passes through the trapezoidal nut (105) and is exposed outside the tray frame, and can rotate within the trapezoidal nut (105). By rotating the screw (106), the initial spacing between the tray liner plates (102) is adjusted. If expansion occurs during the charging process of the battery (101), the tray liner plate (102) can move back and forth along the liner guide shaft (108). The screw (106) horizontally pushes the tray press plate (104) and applies a horizontal forward force, and rotates within the trapezoidal nut (105).

[0006] The constant pressure mechanism assembly (2) includes a mounting base (20) installed horizontally on the ground, with the longer side of the mounting base (20) defined as the left-right direction and the shorter side of the mounting base (20) defined as the front-back direction. Four support columns (21) are installed vertically on the mounting base (20), and an electric cylinder mounting base (22) is installed horizontally at the upper end of the support columns (21). A servo electric cylinder (26) is installed on the electric cylinder mounting base (22), and the servo electric cylinder (26) is connected to a connecting plate (25) by a first electric cylinder output shaft (23). On the side of the connecting plate (25) furthest from the servo electric cylinder (26) are four second electric cylinder output shafts (27 A servo electric cylinder (26) is installed, and the installation position of the second electric cylinder output shaft (27) corresponds one-to-one with the restraint hole (110). One end of the second electric cylinder output shaft (27) is fixed on the connecting plate (25), and the other end passes through the restraint hole (110) and is connected to the tray push plate (104). A pressure sensor (24) is installed between the first electric cylinder output shaft (23) and the connecting plate (25). The pressure sensor (24) is used to monitor the pressure received by the battery (101) in real time, and by adjusting the pressure received by the battery (101) in real time through the servo electric cylinder (26), it is ensured that the pressure received by the battery (101) remains constant after the battery (101) expands.

[0007] Furthermore, four restraining holes (110) are provided around the trapezoidal nut (105).

[0008] Furthermore, locking grooves are provided at both ends of the tray liner plate (102), and these locking grooves are engaged with the liner guide shaft (108), and the tray liner plate (102) can move back and forth along the liner guide shaft (108). Compared to conventional technology, the beneficial effects of the present invention are as follows:

[0009] 1. The present invention can provide a constant pressure to a battery during the charging and discharging process. Specifically, after placing the battery in a tray, it is transported to the charging and discharging position, and pressure is applied based on a predetermined pressure for the process. A pressure sensor monitors the pressure in real time, ensuring that the pressure is adjusted in real time to reach a set value during the expansion and contraction of the battery during the charging and discharging process. This prevents inconsistencies in the gaps of the separators on the tray on which the battery is placed, which can occur due to the lack of pressure feedback during the charging and discharging process, resulting in uneven battery charge and discharge capacity and variations in battery life. This device ensures the consistency and stability of the battery pressure, and stabilizes and matches the battery by monitoring and adjusting the pressure in real time.

[0010] 2. While the present invention has the advantage of solving the problem of uneven pressure causing battery deformation, it also provides real-time adjustment control and feedback to the pressure changes caused by expansion and contraction during the battery charging and discharging process, achieving digital closed-loop and controllable operation, thereby greatly improving battery safety and significantly increasing production capacity and efficiency.

[0011] 3. In this invention, after the battery expands, the servo electric cylinder automatically adjusts the degree of extension of the pressure output shaft based on feedback from the pressure sensor, ensuring that the pressure received by the battery remains constant during the battery charging process. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a schematic diagram of the overall structure of the automatic adjustment device for battery expansion in the constant pressure mechanism of the present invention. [Figure 2a] Figure 2a is a side view 1 of the structure of the constant pressure mechanism assembly of the present invention. [Figure 2b] Figure 2b is a side view 2 of the structure of the constant pressure mechanism assembly of the present invention. [Figure 2c] Figure 2c is a side view 3 of the structure of the constant pressure mechanism assembly of the present invention. [Figure 2d] Figure 2d is a top view of the structure of the constant pressure mechanism assembly of the present invention. [Figure 2e] Figure 2e is a detailed view of the structure of the constant pressure mechanism assembly of the present invention. [Figure 3] Figure 3 is a schematic view of the structure of the constant pressure tray of the present invention. [Figure 4a] Figure 4a is a projection view of one surface of the constant pressure tray of the present invention. [Figure 4b] Figure 4b is a projection view of one surface of the constant pressure tray of the present invention. [Figure 4c] Figure 4c is a projection view of one surface of the constant pressure tray of the present invention. [Figure 4d] Figure 4d is a projection view of one surface of the constant pressure tray of the present invention. [Figure 4e] Figure 4e is a projection view of one surface of the constant pressure tray of the present invention. [Figure 5] Figure 5 is a schematic view of the structure of the tray liner plate of the present invention.

Explanation of Reference Signs

[0013] 1 Constant pressure tray assembly 100 Front fixing plate 101 Battery 102 Tray liner plate 103 Tray bottom frame 104 Tray pressing plate 105 Trapezoidal nut 106 Screw 107 Rear fixing plate 108 Liner guide shaft 109 Engagement groove 110 Restraint hole 2 Constant pressure mechanism assembly 20 Mounting and fixing base 21 Support column 22 Electric cylinder mounting base 23 First electric cylinder output shaft 24 Pressure sensor 25 Connection plate 26 Servo electric cylinder 27 Second Electric Cylinder Output Shaft

Embodiments for Carrying out the Invention

[0014] Hereinafter, with reference to the drawings, specific embodiments in the embodiments of the present invention will be described in detail. It should be understood that the specific embodiments described herein are only for explaining and interpreting the embodiments of the present invention, and not for limiting the embodiments of the present invention.

[0015] It should be noted that, under a non - contradictory situation, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0016] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present invention and simplifying the description, and does not indicate or imply that the indicated devices or elements must have a specific orientation and be configured and operated in a specific orientation, and should not be understood as a limitation to the present invention.

[0017] Also, the terms "first" and "second" are only used for describing the purpose, and should not be understood as indicating relative importance, implying, or implicitly indicating the number of technical features. Therefore, the features limited by "first" and "second" can clearly or implicitly include at least one of the features. In the description of the present invention, "a plurality" means at least two, for example, two, three, etc., unless there is a clear and specific limitation otherwise.

[0018] In this invention, unless otherwise clearly defined and limited, terms such as "attachment," "connection," "bonding," and "fixing" should be understood in a broad sense. For example, it may refer to a fixed connection, a detachable connection, or a connection that forms an integral part of the device. It may refer to a mechanical connection, an electrical connection, or mutual communication. It may refer to a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction relationship between two elements, unless otherwise clearly defined. 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.

[0019] 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.

[0020] 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.

[0021] The present invention will be described in detail below with reference to the drawings and in conjunction with exemplary embodiments. As shown in Figures 1 to 5, the automatic adjustment device for battery expansion of the constant pressure mechanism of the present invention includes a constant pressure tray assembly 1 and a constant pressure mechanism assembly 2, of which,

[0022] The constant-pressure tray assembly 1 includes a horizontally installed tray bottom frame 103, the extension direction of the long side of the tray bottom frame 103 is defined as the front-to-back direction, and the extension direction of the short side of the tray bottom frame 103 is defined as the left-to-right direction. A front fixing plate 100 and a rear fixing plate 107 are installed at the front and rear of the tray bottom frame 103, respectively. A few liner guide shafts 108 are installed between the ends of the front fixing plate 100 and the rear fixing plate 107, spaced apart from top to bottom. The front fixing plate 100, the rear fixing plate 107, and the few liner guide shafts 108 jointly surround and form a tray frame. Inside the tray frame, a few tray liner plates 102 are arranged horizontally at intervals along the left-to-right direction. The tray liner plates 102 can move back and forth along the liner guide shafts 108, and the portion close to the rear fixing plate 107 A tray push plate 104 is installed inside one of the tray liner plates 102, and a battery 101 is placed inside the other tray liner plates 102. A trapezoidal nut 105 is horizontally mounted at the center of the rear fixing plate 107. One end of a screw 106 is connected to the tray push plate 104, and the other end passes through the trapezoidal nut 105 and is exposed outside the tray frame, and can rotate within the trapezoidal nut 105. By rotating the screw 106, the initial spacing between the tray liner plates 102 is adjusted. If expansion occurs during the charging process of the battery 101, the tray liner plates 102 can move back and forth along the liner guide shaft 108. The screw 106 horizontally pushes the tray push plate 104, applying a horizontal forward force, and rotates within the trapezoidal nut 105.

[0023] The constant pressure mechanism assembly 2 includes a mounting base 20 installed horizontally on the ground, with the longer side of the mounting base 20 defined as the left-right direction and the shorter side of the mounting base 20 defined as the front-back direction. Four support columns 21 are installed vertically on the mounting base 20, and an electric cylinder mounting base 22 is installed horizontally at the upper end of the support columns 21. A servo electric cylinder 26 is installed on the electric cylinder mounting base 22, and the servo electric cylinder 26 is connected to a connecting plate 25 by a first electric cylinder output shaft 23. Four second electric cylinder output shafts 27 are installed on the side of the connecting plate 25 furthest from the servo electric cylinder 26, and the second electric cylinder The installation position of the Linda output shaft 27 corresponds one-to-one with the restraint hole 110, and one end of the second electric cylinder output shaft 27 is fixed on the connecting plate 25, while the other end passes through the restraint hole 110 and is connected to the tray push plate 104. A pressure sensor 24 is installed between the first electric cylinder output shaft 23 and the connecting plate 25. The pressure sensor 24 is used to monitor the pressure received by the battery 101 in real time. By automatically adjusting the extension of the first electric cylinder output shaft through the servo electric cylinder 26 and adjusting the pressure received by the battery 101 in real time, it is ensured that the pressure received by the battery 101 remains constant after it expands.

[0024] In one embodiment, four restraining holes 110 are provided around the trapezoidal nut 105.

[0025] In one embodiment, locking grooves are provided at both ends of the tray liner plate 102, the locking grooves are engaged on the liner guide shaft 108, and the tray liner plate 102 can move back and forth along the liner guide shaft 108.

[0026] In this invention, after the battery expands, the servo electric cylinder automatically adjusts the degree of extension of the pressure output shaft based on feedback from the pressure sensor, ensuring that the pressure applied to the battery remains constant during the charging process. Specifically, after placing the battery in a tray, it is transported to the charge / discharge position, and pressure is applied based on a predetermined pressure for the process. The pressure sensor monitors the pressure in real time, ensuring that the pressure is adjusted in real time to reach the set value during the expansion and contraction of the battery during the charging and discharging process. This prevents instability in the applied pressure due to the lack of pressure feedback during the charging and discharging process, which can lead to inconsistencies in the gaps of the separators on the tray on which the battery is placed, regardless of thermal expansion or cold contraction, resulting in uneven battery charge and discharge capacity and variations in battery life. This device ensures the consistency and stability of the battery pressure, and stabilizes and matches the battery by monitoring and adjusting the pressure in real time.

[0027] 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. An automatic adjustment device for battery expansion in a constant pressure mechanism includes a constant pressure tray assembly (1) and a constant pressure mechanism assembly (2), The constant-pressure tray assembly (1) includes a horizontally installed tray bottom frame (103), the extension direction of the long side of the tray bottom frame (103) is defined as the front-to-back direction, and the extension direction of the short side of the tray bottom frame (103) is defined as the left-to-right direction. A front fixing plate (100) and a rear fixing plate (107) are installed on the front and rear of the tray bottom frame (103), respectively. A liner guide shaft (108) is installed between the ends of the front fixing plate (100) and the rear fixing plate (107) with a gap from top to bottom. The front fixing plate (100), the rear fixing plate (107), and the liner guide shaft (108) jointly surround and form a tray frame. Inside the tray frame, tray liner plates (102) are installed horizontally with gaps along the left-to-right direction. The tray liner plates (102) can move back and forth along the liner guide shaft (108), and the portion of the tray liner adjacent to the rear fixing plate (107) A tray press plate (104) is installed inside the plate (102), and a battery (101) is placed inside the other tray liner plates (102). A trapezoidal nut (105) is horizontally mounted at the center of the rear fixing plate (107). One end of the screw (106) is connected to the tray press plate (104), and the other end passes through the trapezoidal nut (105) and is exposed outside the tray frame, and can rotate within the trapezoidal nut (105). By rotating the screw (106), the initial spacing between the tray liner plates (102) is adjusted. If expansion occurs during the charging process of the battery (101), the tray liner plates (102) can move back and forth along the liner guide shaft (108). The screw (106) horizontally pushes the tray press plate (104) and applies a horizontal forward force, and rotates within the trapezoidal nut (105). The constant pressure mechanism assembly (2) includes a mounting base (20) installed horizontally on the ground, with the longer side of the mounting base (20) defined as the left-right direction and the shorter side of the mounting base (20) defined as the front-back direction. Four support columns (21) are installed vertically on the mounting base (20), and an electric cylinder mounting base (22) is installed horizontally at the upper end of the support columns (21). A servo electric cylinder (26) is installed on the electric cylinder mounting base (22), and the servo electric cylinder (26) is connected to a connecting plate (25) by a first electric cylinder output shaft (23). Four second electric cylinder output shafts (27) are installed on the side of the connecting plate (25) furthest from the servo electric cylinder (26). The second electric cylinder output shaft (27) is positioned such that its installation location corresponds one-to-one with the restraint hole (110), one end of the second electric cylinder output shaft (27) is fixed to the connecting plate (25), and the other end is connected to the tray push plate (104) by passing through the restraint hole (110). A pressure sensor (24) is installed between the first electric cylinder output shaft (23) and the connecting plate (25), and the pressure sensor (24) is used to monitor the pressure received by the battery (101) in real time. By adjusting the pressure received by the battery (101) in real time through the servo electric cylinder (26), it is ensured that the pressure received by the battery (101) remains constant after the battery (101) expands. An automatic adjustment device for battery expansion in a constant pressure mechanism.

2. The automatic adjustment device for battery expansion of a constant pressure mechanism according to claim 1, characterized in that four restraining holes (110) are provided around the trapezoidal nut (105).

3. Automatic adjustment device for battery expansion of a constant pressure mechanism according to claim 1, characterized in that locking grooves are provided at both ends of the tray liner plate (102), the locking grooves are engaged on the liner guide shaft (108), and the tray liner plate (102) can move back and forth along the liner guide shaft (108).

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