Automatic adjustment device in response to battery expansion in constant pressure mechanism

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 battery expansion of 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. However, in the high-power and high-energy charge and discharge process of the battery, the internal electrolyte is affected by the current to generate 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 be 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 the battery expansion of a constant pressure mechanism, which solves the problem of uneven pressure and battery deformation, while performing real-time adjustment control and feedback on the pressure changes caused by the expansion and contraction in the charging and discharging process of the battery, realizing digital closed-loop and controllability, greatly improving the safety of the battery, and significantly improving the production capacity and efficiency. In the present invention, in order to solve its technical problems, the following technical methods are adopted. An automatic adjustment device for the battery expansion of a constant pressure mechanism, characterized as follows. It includes a constant pressure tray assembly (1) and a constant pressure mechanism assembly (2), among which,

[0005] The constant-pressure tray assembly (1) includes a horizontally installed tray bottom frame (103). The extending direction of the long side of the tray bottom frame (103) is defined as the front-back direction, and the extending direction of the short side of the tray bottom frame (103) is defined as the left-right direction. A front fixing plate (100) and a rear fixing plate (107) are installed respectively in the front and back of the tray bottom frame (103). A number of liner guide shafts (108) are installed at intervals from top to bottom between both ends of the front fixing plate (100) and the rear fixing plate (107). The front fixing plate (100), the rear fixing plate (107), and a number of liner guide shafts (108) jointly form a tray frame so as to surround. Inside the tray frame, a number of tray liner plates (102) are horizontally installed at intervals along the left-right direction. The tray liner plates (102) can move back and forth along the liner guide shafts (108). A tray pressing plate (104) is installed inside the tray liner plates (102) near the rear fixing plate (107). Batteries (101) are placed inside the other tray liner plates (102). A trapezoidal nut (105) is horizontally attached to the center position of the rear fixing plate (107). One end of a screw (106) is connected to the tray pressing plate (104), and the other end penetrates through the trapezoidal nut (105) and is exposed outside the tray frame and can rotate inside the trapezoidal nut (105). By rotating the screw (106), the initial interval between the tray liner plates (102) is adjusted. When expansion occurs during the charging process of the battery (101), the tray liner plates (102) can move back and forth along the liner guide shafts (108). The screw (106) horizontally presses the tray pressing plate (104) to apply a horizontally forward force and rotates inside the trapezoidal nut (105).

[0006] The constant pressure mechanism assembly (2) includes a mounting and fixing base (20) horizontally installed on the ground. The long side of the mounting and fixing base (20) is defined as the left - right direction, and the short side of the mounting and fixing base (20) is defined as the front - back direction. Four support columns (21) are vertically installed on the mounting and fixing base (20). An electric cylinder mounting base (22) is horizontally installed at the upper end of the support column (21). A servo electric cylinder (26) is installed on the electric cylinder mounting base (22). 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) far from the servo electric cylinder (26). The installation positions of the second electric cylinder output shafts (27) correspond one - to - one with the restraint holes (110). One end of the second electric cylinder output shaft (27) is fixedly installed on the connecting plate (25), and the other end passes through the restraint hole (110) and is connected to a tray pressing 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 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 is constant after the battery (101) expands.

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

[0008] Furthermore, locking grooves are installed at both ends of the tray liner plate (102). The locking grooves are engaged on a liner guide shaft (108), and the tray liner plate (102) can move back and forth along the liner guide shaft (108). Compared with the prior art, the beneficial effects of the present invention are as follows.

[0009] 1. The present invention can provide a certain pressure to the battery during the charging and discharging process of the battery. Specifically, after the battery is placed in the tray, it is transported to the charging and discharging position, and pressure is applied based on a predetermined pressure of the process. By the pressure sensor monitoring the pressure in real time, it is ensured that during the expansion and contraction of the battery in the charging and discharging process, the pressure is adjusted in real time so that it reaches the set value, preventing the applied pressure from becoming unstable due to the lack of pressure feedback during the charging and discharging process of the battery, and preventing the occurrence of inconsistencies in the gaps of the separators of the tray on which the battery is placed due to thermal expansion or cold contraction during the charging and discharging process of the battery, resulting in non-uniform charging and discharging capacity of the battery and variations in the battery life. This device ensures the consistency and stability of the battery pressure, and by monitoring and adjusting the pressure in real time, stabilizes and aligns the batteries.

[0010] 2. While having the advantage of solving the problem that the pressure is non-uniform and causes deformation of the battery, the present invention performs real-time adjustment control and feedback on the pressure changes caused by the expansion and contraction of the battery during the charging and discharging process, realizes digital closed-loop and controllability, greatly improves the safety of the battery, and significantly improves the production capacity and efficiency.

[0011] 3. In the present invention, after the battery expands, due to the feedback of the pressure sensor, the servo electric cylinder automatically adjusts the elongation of the pressure output shaft to ensure that the pressure received by the battery remains unchanged during the charging process of the battery.

Brief Description of the Drawings

[0012]

Figure 1

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Description of Reference Numerals

[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 are not for limiting the embodiments of the present invention.

[0015] It should be noted that, under a non - contradictory situation, the embodiments and the features in the embodiments in 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", "longitudinal direction", "lateral 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 device or element 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 purposes, 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 otherwise clearly and specifically limited.

[0018] In the present invention, unless otherwise clearly defined and limited, terms such as "mounting", "connecting", "connecting", "fixing", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one. It may be a mechanical connection, an electrical connection, or mutual communication. It may be a direct connection, an indirect connection through an intermediate medium, or the communication inside two elements or the interaction relationship between two elements, except when there are otherwise clear limitations. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0019] In the present invention, unless otherwise clearly defined and limited, when the first feature is "above" or "below" the second feature, the first and second features may be in direct contact, or the first and second features may be in indirect contact through an intermediate medium. Also, when the first feature is "above", "above", "upper surface" of the second feature, the first feature may be directly above or obliquely above the second feature, or it may only indicate that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "below", "below", "lower surface" of the second feature, the first feature may be directly below or obliquely below the second feature, or it may only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0020] In the description of this specification, descriptions such as referring to "one embodiment", "several embodiments", "illustration", "specific illustration" or "several illustrations" of terms mean that they are combined with the specific features, structures, materials or features described in the embodiment or illustration and are included in at least one embodiment or illustration of the present invention. In this specification, the schematic expressions of the above terms do not necessarily have to be for the same embodiment or illustration. Also, the specific features, structures, materials or features described can be combined in an appropriate form in one or more embodiments or illustrations. Also, in situations where there is no contradiction, a person skilled in the art can combine or combine different embodiments or illustrations described in this specification and the features of different embodiments or illustrations.

[0021] Hereinafter, with reference to the drawings and in conjunction with exemplary embodiments, the present invention will be described in detail. As shown in FIGS. 1 to 5, the automatic adjustment device associated with the 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. Among them,

[0022] The constant pressure tray assembly 1 includes a horizontally installed tray bottom frame 103. The extending direction of the long side of the tray bottom frame 103 is defined as the front-rear direction, and the extending direction of the short side of the tray bottom frame 103 is defined as the left-right direction. A front fixing plate 100 and a rear fixing plate 107 are respectively installed in the front and rear of the tray bottom frame 103. Between both ends of the front fixing plate 100 and the rear fixing plate 107, several liner guide shafts 108 are installed at intervals from top to bottom. The front fixing plate 100, the rear fixing plate 107, and several liner guide shafts 108 jointly form a tray frame so as to surround. Inside the tray frame, several tray liner plates 102 are horizontally arranged at intervals along the left-right direction. The tray liner plate 102 can move back and forth along the liner guide shaft 108. A tray pressing plate 104 is installed in the tray liner plate 102 near the rear fixing plate 107. Batteries 101 are placed in the other tray liner plates 102. A trapezoidal nut 105 is horizontally attached to the center position of the rear fixing plate 107. One end of a screw 106 is connected to the tray pressing plate 104, and the other end penetrates 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 interval between the tray liner plates 102 is adjusted. When 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 presses the tray pressing plate 104 to apply a horizontally forward force and rotates within the trapezoidal nut 105.

[0023] The constant-pressure mechanism assembly 2 includes a mounting and fixing base 20 horizontally installed on the ground. The long side of the mounting and fixing base 20 is defined as the left-right direction, and the short side of the mounting and fixing base 20 is defined as the front-back direction. Four support columns 21 are vertically installed on the mounting and fixing base 20. An electric cylinder mounting base 22 is horizontally installed at the upper end of the support column 21. A servo electric cylinder 26 is installed on the electric cylinder mounting base 22. The servo electric cylinder 26 is connected to a connection plate 25 by a first electric cylinder output shaft 23. Four second electric cylinder output shafts 27 are installed on the side of the connection plate 25 far from the servo electric cylinder 26. The installation positions of the second electric cylinder output shafts 27 correspond one-to-one with the restraint holes 110. One end of the second electric cylinder output shaft 27 is fixedly installed on the connection plate 25, and the other end passes through the restraint hole 110 and is connected to a tray pressing plate 104. A pressure sensor 24 is installed between the first electric cylinder output shaft 23 and the connection plate 25. The pressure sensor 24 is used to monitor in real time the pressure received by the battery 101. By automatically adjusting the extension length of the first electric cylinder output shaft through the servo electric cylinder 26 and adjusting in real time the pressure received by the battery 101, it is ensured that after the battery 101 expands, the pressure received by the battery is constant.

[0024] In an embodiment, four restraint holes 110 are installed around the trapezoidal nut 105.

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

[0026] In the present invention, after the battery expands, the pressure sensor feeds back to automatically adjust the elongation of the pressure output shaft of the servo electric cylinder, ensuring that the pressure received by the battery remains constant during the charging process of the battery. Specifically, after placing the battery in the tray, it is transported to the charge-discharge position and pressure is applied based on a predetermined pressure of the process. The pressure sensor monitors the pressure in real time, ensuring real-time adjustment so that the pressure reaches the set value during the expansion and contraction of the battery during the charge-discharge process. Without pressure feedback during the charge-discharge process of the battery, the applied pressure becomes unstable, resulting in a mismatch in the gap of the separator of the tray on which the battery is placed regardless of thermal expansion or cold contraction during the charge-discharge process of the battery, uneven charge-discharge capacity of the battery, and variation in the battery life. This device guarantees the consistency and stability of the battery pressure, monitors the pressure in real time, and adjusts it in real time to stabilize and align the batteries.

[0027] As described above, the embodiments of the present invention have been shown and described. However, the above embodiments are exemplary and should not be construed as limitations on the present invention. It is 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 automatic adjustment device for a constant pressure mechanism in response to battery expansion 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), and the direction in which the long side of the tray bottom frame (103) extends is defined as the front-rear direction, and the direction in which the short side of the tray bottom frame (103) extends is defined as the left-right direction. A front fixed plate (100) and a rear fixed plate (107) are installed at the front and rear of the tray bottom frame (103), respectively. A number of liner guide shafts (108) are installed at intervals from top to bottom between both ends of the front fixed plate (100) and the rear fixed plate (107). The front fixed plate (100), the rear fixed plate (107) and the number of liner guide shafts (108) together surround the tray frame. Within the tray frame, a number of tray liner plates (102) are installed horizontally at intervals along the left-right direction. The tray liner plates (102) can move back and forth along the liner guide shafts (108). The tray liner plates (102) in the vicinity of the rear fixed plate (107) can be moved forward and backward along the liner guide shafts (108). A tray push plate (104) is installed in the tray liner plate (102), and the battery (101) is placed in the other tray liner plate (102). A trapezoidal nut (105) is horizontally installed at the center of the rear fixing plate (107). One end of the 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). The initial gap between the tray liner plates (102) is adjusted by rotating the screw (106). When the battery (101) expands during charging, the tray liner plate (102) can move back and forth along the liner guide shaft (108). The screw (106) horizontally pushes the tray push plate (104) to apply a horizontal forward force, and rotates within the trapezoidal nut (105). The constant pressure mechanism assembly (2) includes a mounting base (20) horizontally installed on the ground, the long side of the mounting base (20) being defined as the left-right direction, and the short side of the mounting base (20) being defined as the front-rear direction. Four support pillars (21) are vertically installed on the mounting base (20), an electric cylinder mounting base (22) is horizontally installed at the upper end of the support pillars (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 connection plate (25) by a first electric cylinder output shaft (23), and four second electric cylinder output shafts (27) are installed on the side of the connection plate (25) farther from the servo electric cylinder (26). the second electric cylinder output shaft (27) is fixed on the connecting plate (25) at one end and passes through the restraining hole (110) to connect with 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 the pressure received by the battery (101) is adjusted in real time through the servo electric cylinder (26) to ensure that the pressure received by the battery is constant after the battery (101) expands. Automatic adjustment device for constant pressure mechanism in response to battery expansion.

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

3. 2. The automatic adjustment device for a constant pressure mechanism accompanying battery expansion as described in claim 1, characterized in that the tray liner plate (102) has locking grooves at both ends, the locking grooves are engaged with a 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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