Non-uniform pressurizing device of square shell type lithium battery

Abstract

The utility model relates to a non-uniform pressurizing device of a square shell type lithium battery. The non-uniform pressurizing device of the square shell type lithium battery comprises a mounting part and a non-uniform pressurizing part, the mounting part comprises a first mounting plate and a second mounting plate which are oppositely arranged, and the second mounting plate is used for placing a lithium battery. The non-uniform pressurizing component comprises a moving mechanism and a pressurizing mechanism, the moving mechanism is movably arranged between the first mounting plate and the second mounting plate, the pressurizing mechanism is arranged on the moving mechanism, the moving mechanism is used for driving the pressurizing mechanism to move in a plane parallel to the second mounting plate, and the pressurizing mechanism comprises a pressurizing plate; the pressurizing plate is used for pressurizing the local position of the lithium battery. And the moving mechanism drives the pressurizing mechanism to move in a plane parallel to the second mounting plate, so that the pressurizing mechanism can pressurize different positions of the lithium battery on the second mounting plate, and non-uniform pressurizing on the different positions of the lithium battery is realized.

Description

Technical Field

[0001] The present application relates to the technical field of battery quality control and safety, and in particular to a non-uniform pressurizing device for square-shell lithium batteries. Background Art

[0002] Faced with the global challenges of increasingly depleted fossil energy and worsening air pollution, the research and development and application of new energy technologies have become the key to promoting the development of mobile energy. The popularity and development of electric vehicles depends to a large extent on the progress of battery technology. Prismatic lithium batteries have been widely used in various power tools, electric vehicles and portable devices due to their significant advantages such as simple structure, light weight, high energy density, high power density and low self-discharge rate.

[0003] In actual use, square-shell lithium batteries are often affected by uneven external pressure, which may cause damage to the internal structure of the battery and performance degradation, thereby affecting its safety and performance. In order to ensure the reliability of battery energy storage, it is very important to conduct pre-delivery testing on square-shell lithium batteries.

[0004] However, the related art can only implement the testing of square shell batteries under uniform pressure, and cannot implement the testing of square shell lithium batteries under different pressures applied to different positions. Utility Model Content

[0005] Based on this, it is necessary to provide a non-uniform pressurizing device for square-shell lithium batteries to address the problem in the related art that it is impossible to test different positions of square-shell lithium batteries under different pressures.

[0006] A non-uniform pressurizing device for a square-shell lithium battery, the non-uniform pressurizing device for a square-shell lithium battery comprising:

[0007] The mounting component comprises a first mounting plate and a second mounting plate which are arranged opposite to each other and connected to each other, wherein the second mounting plate is used for placing a lithium battery;

[0008] The uneven pressure component includes a moving mechanism and a pressure mechanism, wherein the moving mechanism is movably arranged between the first mounting plate and the second mounting plate, and the pressure mechanism is arranged on the moving mechanism. The moving mechanism is used to move the pressure mechanism in a plane parallel to the second mounting plate, and the pressure mechanism includes a pressure plate, which is used to pressurize a local position of the lithium battery.

[0009] In one embodiment, the pressurizing mechanism includes a telescopic assembly, and the telescopic assembly is used to drive the pressurizing plate to move closer to or away from the second mounting plate.

[0010] In one embodiment, the pressure mechanism includes: a first fixed plate, at least one pair of support arms and an angle adjustment assembly, each pair of support arms includes a first support arm and a second support arm, the first support arm and the second support arm are rotatably connected, the end of the first support arm away from the second support arm is rotatably connected to the first fixed plate, the end of the second support arm away from the first support arm is rotatably connected to the pressure plate, the first fixed plate is fixedly connected to the moving mechanism, and the angle adjustment assembly is used to adjust the angle between the first support arm and the second support arm.

[0011] In one embodiment, the pressurizing mechanism includes two pairs of support arms, each pair of the support arms further includes a sleeve, and the first support arm and the second support arm are rotatably connected to the sleeve respectively;

[0012] The angle adjustment assembly comprises a screw rod, and the sleeves of the two pairs of support arms are respectively threadedly connected to the screw rod, and the thread directions of the two sleeves are opposite.

[0013] In one embodiment, the pressurizing mechanism further includes a buffer assembly, and the second support arm is connected to the pressurizing plate via the buffer assembly.

[0014] In one embodiment, the uneven pressurizing device for the square-shell lithium battery further includes a fixing component, and the fixing component is disposed between the first mounting plate and the second mounting plate;

[0015] The fixing component includes a first fixing plate and a second fixing plate arranged opposite to each other, the second fixing plate can be close to or away from the first fixing plate, the moving mechanism is fixed on the first fixing plate, the lithium battery is arranged between the second fixing plate and the second mounting plate, a through hole is opened on the second fixing plate, and the pressure plate can extend into the through hole to pressurize the lithium battery.

[0016] In one embodiment, the moving mechanism includes a first moving component arranged along a first direction and a second moving component arranged along a second direction, the first moving component is fixed on the first fixed plate, the second moving component is arranged on the first moving component, the first moving component is used to drive the second moving component to move along the first direction, the pressing mechanism is arranged on the second moving component, the second moving component is used to drive the pressing mechanism to move along the second direction, and the first direction and the second direction are arranged at an angle.

[0017] In one embodiment, the first movable component includes two oppositely arranged guide rails and first sliders respectively arranged in the guide rails, the second movable component includes a slide rod and a second slider cooperating with the slide rod, the two ends of the slide rod are respectively connected to the first slider, the guide rails are arranged along the first direction, and the slide rod is arranged along the second direction.

[0018] In one embodiment, the moving mechanism includes a first adsorption head, and the first adsorption head is used to selectively adsorb on any position of the first fixed plate.

[0019] In one embodiment, the first fixing plate is an iron plate, a cobalt plate or a nickel plate;

[0020] The moving mechanism comprises a magnetic block, and the magnetic block can be selectively adsorbed on any position of the first fixing plate.

[0021] The uneven pressurizing device for the above-mentioned square-shell lithium battery, the uneven pressurizing component includes a moving mechanism and a pressurizing mechanism, the moving mechanism can drive the pressurizing mechanism to move in a plane parallel to the second mounting plate, so that the pressurizing mechanism can pressurize different positions of the lithium battery located on the second mounting plate, thereby achieving uneven pressurization of different positions of the lithium battery. When the square-shell lithium battery is placed on the second mounting plate, it can be tested under different pressures applied to different positions of the square-shell lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of a non-uniform pressurizing device for a square shell type lithium battery in one embodiment.

[0023] Figure 2 Schematic diagram of the structure of the uneven pressure component in one embodiment.

[0024] Figure 3 Schematic diagram of the connection structure between the fixing component and the mounting component in one embodiment.

[0025] Figure 4 Schematic diagram of the structure of a lithium battery performance testing system in one embodiment.

[0026] Figure numerals: 100, mounting component; 110, first mounting plate; 120, second mounting plate; 130, second guide rod; 140, locking nut; 201, pressure sensor; 202, amplifier circuit; 203, A / D converter; 204, microprocessor; 205, read-only memory; 206, detection device; 206a, charging and discharging machine; 206b, electrochemical workstation; 207, first interface; 208, external device; 209, second interface; 210, LCD display; 211, bus; 212, PC terminal; 300, fixing component; 310, first fixing Plate; 320, second fixed plate; 330, first guide rod; 340, pressure nut; 350, first elastic member; 400, moving mechanism; 410, first moving assembly; 411, guide rail; 412, first slider; 420, second moving assembly; 421, slide rod; 422, second slider; 500, pressure mechanism; 510, first connecting plate; 520, first support arm; 530, second support arm; 540, sleeve; 550, angle adjustment assembly; 551, screw; 552, handle; 560, second connecting plate; 570, second elastic member; 580, pressure plate. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if 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. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; 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 this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] See also Figure 1-Figure 3, an uneven pressurizing device for a square-shell lithium battery provided in one embodiment of the present application, the uneven pressurizing device for a square-shell lithium battery includes a mounting component 100 and an uneven pressurizing component. The mounting component 100 includes a first mounting plate 110 and a second mounting plate 120 that are relatively arranged and connected to each other, and the second mounting plate 120 is used to place the lithium battery. The uneven pressurizing component includes a moving mechanism 400 and a pressurizing mechanism 500, the moving mechanism 400 is movably arranged between the first mounting plate 110 and the second mounting plate 120, the pressurizing mechanism 500 is arranged on the moving mechanism 400, the moving mechanism 400 is used to drive the pressurizing mechanism 500 to move in a plane parallel to the second mounting plate 120, and the pressurizing mechanism 500 includes a pressurizing plate 580, and the pressurizing plate 580 is used to pressurize a local position of the lithium battery.

[0034] In this embodiment, the uneven pressure component includes a moving mechanism 400 and a pressure mechanism 500. The moving mechanism 400 can drive the pressure mechanism 500 to move in a plane parallel to the second mounting plate 120, so that the pressure mechanism 500 can pressurize different positions of the lithium battery on the second mounting plate 120, thereby achieving uneven pressure on different positions of the lithium battery. When the square shell lithium battery is placed on the second mounting plate 120, it can be tested under different pressures applied to different positions of the square shell lithium battery.

[0035] In some embodiments, in combination Figure 3 The mounting component 100 includes a second guide rod 130 and a locking nut 140 matched with the second guide rod 130. The second guide rod 130 passes through the first mounting plate 110 and the second mounting plate 120 in sequence. The locking nut 140 is provided at one end of the first mounting plate 110 away from the second mounting plate 120 and at one end of the second mounting plate 120 away from the first mounting plate 110. By adjusting the locking nut 140 on the first mounting plate 110 or the locking nut 140 on the second mounting plate 120, the relative position of the first mounting plate 110 and the second mounting plate 120 can be adjusted, so as to facilitate the adaptation to lithium batteries of different sizes.

[0036] In some embodiments, the pressurizing mechanism 500 includes a telescopic component, which is used to drive the pressurizing plate 580 to move closer to or away from the second mounting plate 120 .

[0037] Further, combined with Figure 2The pressurizing mechanism 500 includes: a first connecting plate 510, at least one pair of support arms and an angle adjustment assembly 550, each pair of support arms includes a first support arm 520 and a second support arm 530, the first support arm 520 and the second support arm 530 are rotatably connected, one end of the first support arm 520 away from the second support arm 530 is rotatably connected to the first connecting plate 510, one end of the second support arm 530 away from the first support arm 520 is rotatably connected to the pressurizing plate 580, the first connecting plate 510 is fixedly connected to the moving mechanism 400, and the angle adjustment assembly 550 is used to adjust the angle between the first support arm 520 and the second support arm 530.

[0038] In this embodiment, the first support arm 520 and the second support arm 530 are rotatably connected, that is, the two can be rotated to form any angle. When the first support arm 520 and the second support arm 530 are rotated to the same straight line, the pressure applied to the pressure plate 580 is the largest, that is, the pressure on the lithium battery is the largest; when the angle between the first support arm 520 and the second support arm 530 is reduced to the point where the two overlap, the pressure applied to the pressure plate 580 is the smallest, that is, the pressure on the lithium battery is the smallest. Therefore, when the angle between the first support arm 520 and the second support arm 530 is adjusted by the angle adjustment assembly 550, the pressure applied by the pressure plate 580 on the lithium battery can be changed, thereby achieving the application of uneven pressure to different positions of the lithium battery.

[0039] Specifically, the pressurizing mechanism 500 includes two pairs of support arms, each pair of support arms further includes a sleeve 540, and the first support arm 520 and the corresponding second support arm 530 are respectively rotatably connected to the sleeve 540. The angle adjustment assembly 550 includes a screw 551, and the sleeves 540 of the two pairs of support arms are respectively threadedly connected to the screw 551, and the thread directions of the two sleeves 540 are opposite.

[0040] The thread directions of the two sleeves 540 are opposite, so when the screw rod 551 is rotated, the two sleeves 540 move closer to each other and farther away from each other. Specifically, taking the clockwise rotation of the screw rod 551 as an example, the two sleeves 540 move closer to each other, and the angles between the two pairs of first support arms 520 and second support arms 530 increase at the same time, thereby increasing the pressure applied by the pressure plate 580 on the battery. Of course, the two sleeves 540 can also move away from each other when the screw rod 551 is rotated counterclockwise.

[0041] Among them, one end of the screw rod 551 is threadedly connected to a handle 552 perpendicular to the screw rod 551. When the handle 552 is driven to rotate around the screw rod 551, the two pairs of first support arms 520 and second support arms 530 can be moved closer to or away from each other, thereby adjusting the pressure applied by the pressure plate 580 on the battery.

[0042] In some embodiments, the pressurizing mechanism 500 further includes a buffer assembly, and the second support arm 530 is connected to the pressurizing plate 580 via the buffer assembly.

[0043] Specifically, the buffer assembly includes a second connecting plate 560 and a second elastic member 570, the second supporting arm 530 is rotatably connected to the second connecting plate 560, and the second connecting plate 560 is connected to the pressure plate 580 through the second elastic member 570. That is, by adding the second connecting plate 560 and the second elastic member 570, it is used to prevent the pressure mechanism 500 from damaging the lithium battery when the pressure is too high. The pressure plate 580 can be made of rubber.

[0044] In some embodiments, in combination Figure 3 The uneven pressurizing device for the square-shell lithium battery also includes a fixing component 300, which is arranged between the first mounting plate 110 and the second mounting plate 120; the fixing component 300 includes a first fixing plate 310 and a second fixing plate 320 which are arranged opposite to each other, and the second fixing plate 320 can be close to or away from the first fixing plate 310, and the moving mechanism 400 is fixed on the first fixing plate 310, and the lithium battery is arranged between the second fixing plate 320 and the second mounting plate 120, and a through hole is opened on the second fixing plate 320, and the pressurizing plate 580 can extend into the through hole to pressurize the lithium battery.

[0045] The second fixing plate 320 can be close to or away from the first fixing plate 310. When the second fixing plate 320 is away from the first fixing plate 310, that is, the second fixing plate 320 is close to the second mounting plate 120, the lithium battery on the second mounting plate 120 can be pressurized by the second fixing plate 320, so as to fix the lithium battery. In addition, the second fixing plate 320 can be close to or away from the first fixing plate 310, that is, it can adapt to the measurement of lithium batteries of different sizes, further improving the versatility of the uneven pressurization device for lithium square shell lithium batteries.

[0046] Specifically, the fixing component 300 includes a first guide rod 330, a pressure nut 340 threadedly connected to the first guide rod 330, and a first elastic member 350 sleeved outside the first guide rod 330. The first guide rod 330 passes through the first fixing plate 310 and the second fixing plate 320 in sequence. The pressure nut 340 is located on the side of the first fixing plate 310 away from the second fixing plate 320. The two ends of the first elastic member 350 are respectively connected to the first fixing plate 310 and the second fixing plate 320.

[0047] In actual use, when the pressure nut 340 is tightened, the pressure nut 340 can push the second fixing plate 320 downward through the first fixing plate 310 and the first elastic member 350 in sequence until the second fixing plate 320 contacts the lithium battery. When the pressure nut 340 is further tightened, the first elastic member 350 is compressed, thereby pressurizing the lithium battery through the first pressure plate 580 and fixing the lithium battery on the second mounting plate 120. By adjusting the compression length of the first elastic member 350, the magnitude of the force applied to the lithium battery can be controlled.

[0048] The battery is pressurized and fixed by the fixing component 300, and a through hole is opened on the second fixing plate 320. The pressure plate 580 can extend into the through hole to pressurize the lithium battery, which can ensure that the position of the uneven pressure application area is fixed in each experiment, with high repeatability and no errors caused by position offset.

[0049] In some embodiments, the moving mechanism 400 includes a first moving component 410 arranged along a first direction and a second moving component 420 arranged along a second direction, the first moving component 410 is fixed on the first fixed plate 310, the second moving component 420 is arranged on the first moving component 410, the first moving component 410 is used to drive the second moving component 420 to move along the first direction, the pressurizing mechanism 500 is arranged on the second moving component 420, the second moving component 420 is used to drive the pressurizing mechanism 500 to move along the second direction, and the first direction and the second direction are arranged at an angle.

[0050] Furthermore, the angle between the first direction and the second direction can be 0°-90°, and specifically, the first direction is perpendicular to the second direction. The first moving component 410 and the second moving component 420 can drive the pressurizing mechanism 500 to move to any position on the lithium battery and in the through hole, so as to pressurize different positions of the lithium battery.

[0051] Specifically, the first movable component 410 includes two relatively arranged guide rails 411 and first sliders 412 respectively arranged in the guide rails 411, and the second movable component 420 includes a slide rod 421 and a second slider 422 cooperating with the slide rod 421, and the two ends of the slide rod 421 are respectively connected to the first slider 412, the guide rail 411 is set along the first direction, and the slide rod 421 is set along the second direction.

[0052] When the first slider 412 moves along the first direction in the guide rail 411, it is used to drive the pressurizing mechanism 500 to move along the first direction. When the second slider 422 moves along the second direction on the slide bar 421, it is used to drive the pressurizing mechanism 500 to move along the second direction. The first moving assembly 410 and the second moving assembly 420 have simple structures and convenient and flexible adjustment methods, which can greatly reduce the experimental test cycle and the preparation of the experimental mold.

[0053] In some embodiments, a coordinate system and a grid pattern are provided at the bottom of the first fixing plate 310. In multiple experiments, the position of the pressure application area of ​​the pressurizing mechanism 500 is guaranteed to be the same in each experiment, thereby improving repeatability and preventing errors caused by position offset.

[0054] In some other embodiments, the moving mechanism 400 includes a first adsorption head, and the first adsorption head is used to selectively adsorb on any position of the first fixed plate 310.

[0055] Furthermore, the first fixing plate 310 is an iron plate, a cobalt plate or a nickel plate. The moving mechanism 400 includes a magnetic block, which can be selectively adsorbed on any position of the first fixing plate 310 .

[0056] Of course, the first adsorption head can also be adsorbed on the first fixed plate 310 through negative pressure.

[0057] The uneven pressurizing device for the square-shell lithium battery of the present application applies different pressure values ​​to local areas of the lithium battery through the uneven pressurizing component on the basis of overall pressurizing the lithium battery through the fixing component 300, thereby being able to simulate uneven pressure conditions; by adjusting the position of the opening on the second fixing plate 320 and moving the pressurizing mechanism 500 through the moving mechanism 400, it is possible to achieve the effect of applying uneven pressure to different areas of the lithium battery.

[0058] The heights of the upper and lower plates of the fixing component 300 can be adjusted to accommodate the measurement of square-shell batteries of different sizes, further improving the versatility of the square-shell lithium battery clamp; the above-mentioned slide rail-type square-shell lithium battery clamp that applies non-fixed-point uneven pressure adjusts the positions of the openings on the fixing block and the lower plate of the fixing component 300 to achieve the effect of applying uneven pressure to different areas of the square-shell lithium battery.

[0059] The lithium battery is fixed by the uneven pressurizing device of the square shell lithium battery, and after pressurization, when the pressure sensor 201 shows that the pressure value of each part area on the lithium battery reaches the set working condition, the microprocessor 204 controls the charging and discharging machine 206a and the electrochemical workstation 206b to start at the same time to perform a cycle test on the square shell lithium battery.

[0060] Among them, combined Figure 4The performance detection system includes a pressure sensor 201, an amplifier circuit 202, an A / D converter 203, a microprocessor 204, a read-only memory 205, a detection device 206, a first interface 207, an external device 208, a second interface 209, an LCD display 210, a bus 211 and a PC terminal 212. The detection device 206 includes a charger and a discharger 206a and an electrochemical workstation 206b. The pressure sensor 201 detects the stress changes in the lithium battery and converts the non-electrical pressure signal into a voltage signal; the amplifier circuit 202 is electrically connected to the pressure sensor 201, and amplifies the voltage signal converted by the pressure sensor 201 to make the analog signal suitable for the voltage conversion range of the A / D converter 203; the A / D converter 203 is electrically connected to the amplifier circuit 202, and is used to convert the analog signal into a digital signal; the microprocessor 204 is electrically connected to the A / D converter 203, and collects the digital signal output by the A / D converter 203, and then performs analysis, judgment, calculation and other processing to obtain the measurement result. The read-only memory 205 is electrically connected to the microprocessor 204 for expanding the storage capacity of the microprocessor 204; the external device 208 is electrically connected to the microprocessor 204 via the first interface 207, and the performance detection system is controlled through the external device input; the LCD display screen 210 is electrically connected to the microprocessor 204 via the second interface 209, and the measurement result of the microprocessor 204 is displayed; the signal output by the microprocessor 204 is electrically connected to the PC terminal 212 via the bus 211 after level conversion, and the PC terminal 212 can perform subsequent processing on the data and realize the control of the performance detection system.

[0061] When the pressure sensor 201 shows that the pressure value of each part of the lithium battery reaches the set working condition, the microprocessor 204 controls the detection device 206 to start, that is, the charger 206a and the electrochemical workstation 206b are turned on at the same time to perform a cycle test on the square shell type lithium battery. The charger 206a is electrically connected to the microprocessor 204, and has a constant current and constant voltage charging and discharging function, which is used to perform a cycle test under the set working condition; the electrochemical workstation 206b is electrically connected to the microprocessor 204, and is used to detect and record the current value, capacitance value, voltage value, energy value and other related test data inside the square shell type lithium battery in real time. The PC terminal 212 performs subsequent analysis and processing on the output test data and draws a change curve chart. According to the curve chart, it can be judged that the uneven pressure has an impact on the safety and performance of the square shell type lithium battery.

[0062] In addition, based on the test data, it is also possible to verify the impact of replacing the positive and negative electrode materials, replacing the diaphragm, replacing the electrolyte, adjusting the production process and other parameters on the battery; and on this basis, verify the impact of different charging strategies and different cycle systems on the safety and performance of square shell lithium batteries, providing a reliable experimental basis and reference basis for subsequent research, which will help promote the further development of battery technology and improve the safety and performance of lithium batteries.

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A non-uniform pressurizing device for a square-shell lithium battery, characterized in that: The non-uniform pressurizing device of the square shell lithium battery comprises: The mounting component (100) comprises a first mounting plate (110) and a second mounting plate (120) which are arranged opposite to each other and connected to each other, wherein the second mounting plate (120) is used for placing a lithium battery; The uneven pressure component comprises a moving mechanism (400) and a pressure mechanism (500), wherein the moving mechanism (400) is movably arranged between the first mounting plate (110) and the second mounting plate (120), and the pressure mechanism (500) is arranged on the moving mechanism (400), and the moving mechanism (400) is used to make the pressure mechanism (500) move in a plane parallel to the second mounting plate (120), and the pressure mechanism (500) comprises a pressure plate (580), and the pressure plate (580) is used to pressurize a local position of the lithium battery.

2. The non-uniform pressurizing device for a square-shell lithium battery according to claim 1, characterized in that: The pressurizing mechanism (500) comprises a telescopic assembly, and the telescopic assembly is used to drive the pressurizing plate (580) to move closer to or away from the second mounting plate (120).

3. The non-uniform pressurizing device for a square-shell lithium battery according to claim 2, characterized in that: The pressurizing mechanism (500) comprises: a first connecting plate (510), at least one pair of support arms and an angle adjustment assembly (550), each pair of support arms comprises a first support arm (520) and a second support arm (530), the first support arm (520) and the second support arm (530) are rotatably connected, one end of the first support arm (520) away from the second support arm (530) is rotatably connected to the first connecting plate (510), one end of the second support arm (530) away from the first support arm (520) is used for being rotatably connected to the pressurizing plate (580), the first connecting plate (510) is fixedly connected to the moving mechanism (400), and the angle adjustment assembly (550) is used for adjusting the angle between the first support arm (520) and the second support arm (530).

4. The non-uniform pressurizing device for a square-shell lithium battery according to claim 3, characterized in that: The pressurizing mechanism (500) comprises two pairs of support arms, each pair of the support arms further comprises a sleeve (540), and the first support arm (520) and the corresponding second support arm (530) are respectively rotatably connected to the sleeve (540); The angle adjustment assembly (550) comprises a screw rod (551), and the two pairs of sleeves (540) of the support arms are respectively threadedly connected to the screw rod (551), and the thread directions of the two sleeves (540) are opposite.

5. The non-uniform pressurizing device for a square-shell lithium battery according to claim 3, characterized in that: The pressurizing mechanism (500) further comprises a buffer assembly, and the second support arm (530) is connected to the pressurizing plate (580) via the buffer assembly.

6. The non-uniform pressurizing device for a square-shell lithium battery according to claim 1, characterized in that: The non-uniform pressurizing device for a square-shell lithium battery further comprises a fixing component (300), wherein the fixing component (300) is arranged between the first mounting plate (110) and the second mounting plate (120); The fixing component (300) includes a first fixing plate (310) and a second fixing plate (320) which are arranged opposite to each other, the second fixing plate (320) can be close to or away from the first fixing plate (310), the moving mechanism (400) is fixed to the first fixing plate (310), the lithium battery is arranged between the second fixing plate (320) and the second mounting plate (120), a through hole is provided on the second fixing plate (320), and the pressurizing plate (580) can extend into the through hole to pressurize the lithium battery.

7. The non-uniform pressurizing device for a square-shell lithium battery according to claim 6, characterized in that: The moving mechanism (400) comprises a first moving component (410) arranged along a first direction and a second moving component (420) arranged along a second direction, wherein the first moving component (410) is fixed on the first fixed plate (310), the second moving component (420) is arranged on the first moving component (410), the first moving component (410) is used to drive the second moving component (420) to move along the first direction, the pressing mechanism (500) is arranged on the second moving component (420), the second moving component (420) is used to drive the pressing mechanism (500) to move along the second direction, and the first direction and the second direction are arranged at an angle.

8. The non-uniform pressurizing device for a square-shell lithium battery according to claim 7, characterized in that: The first moving component (410) includes two guide rails (411) arranged opposite to each other and first sliders (412) respectively arranged in the guide rails (411); the second moving component (420) includes a slide bar (421) and a second slider (422) matched with the slide bar (421); both ends of the slide bar (421) are respectively connected to the first slider (412); the guide rails (411) are arranged along a first direction, and the slide bar (421) is arranged along a second direction.

9. The non-uniform pressurizing device for a square-shell lithium battery according to claim 6, characterized in that: The moving mechanism (400) comprises a first adsorption head, and the first adsorption head is used to selectively adsorb on any position of the first fixed plate (310).

10. The non-uniform pressurizing device for a square-shell lithium battery according to claim 9, characterized in that: The first fixing plate (310) is an iron plate, a cobalt plate or a nickel plate; The moving mechanism (400) comprises a magnetic block, and the magnetic block can be selectively adsorbed on any position of the first fixing plate (310).

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