A battery pack restraining device

Abstract

This invention discloses a battery pack restraint device, including a work platform and two main restraint mechanisms slidably disposed on opposite sides of the work platform, with their sliding strokes facing each other. Each main restraint mechanism includes a frame assembly, with a pressing component at the upper end and a first elastic element at the lower end. One end of the first elastic element has a main force measuring element that detects and obtains a main pressure F0. The pressing component includes a main plate and n pressing blocks evenly arranged on the main plate. Each pressing block has a micro-pressure adjusting component between itself and the main plate, and a partial force measuring element on the pressing end face of the pressing block obtains a partial pressure F1. During operation, if F1 exceeds a preset threshold of F0 / n, the micro-pressure adjusting component operates; if F1 does not exceed the preset threshold of F0 / n, the current state of the micro-pressure adjusting component is maintained. Based on overall restraint, the device achieves local pressure state control, completing the restraint operation.

Description

Technical Field

[0001] This invention relates to the field of battery pack technology, and more particularly to a device for adding or removing restraints on a battery pack. Background Technology

[0002] With the rapid development of the new energy industry, battery packs, as the core unit of power batteries, energy storage batteries, and other systems, face higher requirements for structural stability and consistency in their manufacturing process. After the battery cells are assembled and filled with electrolyte, they typically undergo key processes such as formation and settling. During this process, complex electrochemical reactions occur inside the battery, accompanied by a certain degree of gas generation. Especially for high-energy-density batteries and battery packs using aluminum-plastic film soft-pack or aluminum shell structures, the lack of effective external constraints can easily lead to problems such as shell expansion and deformation, which in turn affects the alignment of the electrode plates, the internal resistance and capacity stability of the cells, and may even pose safety hazards. Therefore, in relevant production processes, it is usually necessary to use restraint devices to apply continuous and stable external constraints to the battery pack to ensure that it completes the formation and settling processes under controlled conditions.

[0003] Existing battery pack clamping and unclamping devices typically employ paired clamping or pressing mechanisms to apply an overall clamping force to the battery pack from opposite directions, thereby limiting and constraining it. These devices generally control the clamping stroke through a drive mechanism and manage the overall clamping force using a single force measuring unit or a preset stroke method. However, because the expansion of the battery pack during formation and settling processes is often localized and uneven, relying solely on overall clamping force control is insufficient to reflect local pressure changes in a timely manner. This can easily lead to excessive or insufficient stress in certain areas, resulting in problems such as localized bulging and stress concentration, affecting the consistency and reliability of the battery pack.

[0004] Therefore, how to effectively sense and regulate the local pressure state of the battery pack while ensuring the overall restraint effect has become a technical problem that urgently needs to be solved in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a battery pack restraint device to solve the above-mentioned technical problems.

[0006] To achieve this objective, the present invention adopts the following technical solution: A battery pack restraint device includes: a work platform, and a main restraint mechanism slidably disposed on both sides of the work platform, wherein the sliding strokes of the two main restraint mechanisms are arranged facing each other; The main clamping mechanism includes a frame assembly, the upper end of which is provided with a pressing assembly, and the lower end of which is provided with a first elastic element. One end of the first elastic element is provided with a main force measuring element, and the main force measuring element detects and obtains the main pressure F0. The pressing assembly includes a main plate and n pressing blocks evenly arranged on the main plate. Each pressing block is provided with a micro-pressure adjustment component between itself and the main plate. The pressing end face of the pressing block is provided with a force measuring element, and the force measuring element obtains a partial pressure F1. During operation, if F1 exceeds the preset threshold of F0 / n, the micro-pressure regulator will operate; if F1 does not exceed the preset threshold of F0 / n, the current state of the micro-pressure regulator will be maintained.

[0007] Optionally, the micro-pressure adjusting component is a micro-airbag, which is disposed between the pressure block and the main body plate; The micro airbag is connected to an air tube, and a pressure control valve is provided on the air tube to adjust the gas pressure inside the micro airbag, thereby changing the local pressure applied by the pressure block to the battery pack.

[0008] Optionally, the main body plate is provided with mounting grooves that correspond one-to-one with the pressure blocks. One end of the pressure block is housed in the mounting groove and can slide slightly along the extension direction of the mounting groove. The mounting groove is provided with a limiting part at the groove opening to limit the sliding stroke of the pressure block; The main body plate is provided with elastic support arms on both sides. The elastic support arms abut against the limiting part and are used to reset the pressure block and maintain its initial working position when the micro pressure adjustment component is not activated.

[0009] Optionally, the n pressure blocks are arranged side by side evenly along the vertical or horizontal direction of the main body plate; Alternatively, the n pressure blocks are arranged in an array on the main body plate to perform multi-point pressure adjustment according to the regional distribution of the pressure surface of the battery pack.

[0010] Optionally, the pressure block has a receiving groove on one end face away from the main body plate, and the force measuring element is installed in the receiving groove; The force measuring element is a button-type pressure sensor, which transmits signals via leads.

[0011] Optionally, the first elastic element is a corrugated elastic component, which is arranged along the force direction of the main clamping mechanism. One end of the elastic component is fixedly connected to the lower end of the frame component, and the other end is connected to the main force measuring element; The corrugated elastic components are configured in one or more parallel connections to generate elastic deformation when the main restraining mechanism applies a restraining force.

[0012] Optionally, the main force measuring element is disposed between the first elastic element and the frame assembly, and the main force measuring element is arranged along the force direction of the main clamping mechanism; The main force measuring element includes a force sensor body and a signal output terminal connected thereto. The force-receiving end of the force sensor body is abutted or fixedly connected to the first elastic element, and the other end is fixedly connected to the frame assembly.

[0013] Optionally, the restraint device further includes two sets of side restraint mechanisms disposed on the work platform, and the two sets of side restraint mechanisms and the two sets of main restraint mechanisms form a restraint space for restraining the battery pack. The side clamping mechanism includes a side support frame and a side pressure plate disposed on the side support frame. The side pressure plate is adjustable in a direction perpendicular to the sliding direction of the main clamping mechanism. The side pressure plate is used to limit or assist in clamping the side of the battery pack, so as to form a four-way clamping structure in conjunction with the main clamping mechanism.

[0014] Optionally, the restraint device further includes a drive mechanism disposed below the work platform. The drive mechanism includes a drive motor, and transmission shafts are respectively disposed at both ends of the output shaft of the drive motor. One end of the transmission shaft is connected to a lead screw through a coupling assembly, wherein the threads of the two sets of lead screws are arranged in opposite directions. The lower end face of the frame assembly is provided with a nut seat, and the lead screw passes through the nut seat to push the two sets of main clamping mechanisms to move towards each other.

[0015] Optionally, a slide rail is provided on each side of the work platform, and the frame assembly is slidably connected to the corresponding slide rail; The frame assembly is equipped with a sensor plate, and a number of sensors are correspondingly arranged on one side of the slide rail. The sensor plate and the sensors work together to detect the sliding position of the main clamping mechanism.

[0016] Compared with the prior art, the present invention has the following beneficial effects: During the operation, the battery pack is placed on the working platform, and the two main clamping mechanisms located on both sides of the working platform move synchronously along opposite sliding strokes under the driving action to clamp the battery pack in a close manner; as the main clamping mechanisms move, the pressing components gradually contact the corresponding pressure surfaces of the battery pack and apply an overall restraining force; during the application of the restraining force, the main force measuring element set at the lower end of the main clamping mechanism detects and obtains the overall main pressure F in real time, and at the same time, the partial force measuring elements set on the pressing end face of each pressing block detect the partial pressure F applied by the corresponding pressing block respectively; the system compares and judges the detected partial pressure F with the theoretical pressure value F / n after the main pressure F is distributed according to the number of pressing blocks n. When the partial pressure F corresponding to a certain pressure block exceeds the preset threshold of F / n, the micro pressure regulating component corresponding to that pressure block is driven to operate, and the local pressure applied to that pressure block is adjusted; when the partial pressure F does not exceed the preset threshold, the current state of the micro pressure regulating component is maintained, thereby realizing the control of the local pressure state on the basis of overall restraint, and completing the battery pack restraint operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the battery pack restraint device in this embodiment. Figure 2 This is a front view schematic diagram of the battery pack restraint device in Embodiment 1. Figure 3 This is a schematic diagram of the overall structure of the main restraint mechanism of the battery pack restraint device in Embodiment 1. Figure 4 This is a cross-sectional schematic diagram of the pressing assembly of the battery pack's adding and unbinding restraint device in this embodiment. Figure 5This is a schematic diagram of the side restraint mechanism of the battery pack's restraint-releasing device in Embodiment 1. Figure 6 This is a schematic diagram of the drive mechanism of the battery pack restraint device in this embodiment.

[0020] Illustration: Work platform 100, main clamping mechanism 200, frame assembly 210, pressing assembly 220, first elastic element 230, main force measuring element 240, main plate 221, pressure block 222, micro pressure adjusting element 223, partial force measuring element 224, pressure control valve 225, mounting groove 226, limiting part 227, elastic support arm 228, side clamping mechanism 300, side support frame 310, side pressure plate 320, drive mechanism 400, drive motor 410, transmission shaft 420, lead screw 430, nut seat 440, slide rail 110, sensing plate 211, sensor 111. Detailed Implementation

[0021] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Combination Figures 1 to 6As shown, this embodiment of the invention provides a battery pack restraint device, including a work platform 100 and a main restraint mechanism 200 slidably disposed on both sides of the work platform 100. The sliding strokes of the two main restraint mechanisms 200 are arranged facing each other. The main restraint mechanism 200 includes a frame assembly 210. The upper end of the frame assembly 210 is provided with a pressing assembly 220, and the lower end of the frame assembly 210 is provided with a first elastic element 230. One end of the first elastic element 230 is provided with a main force measuring element 240, and the main force measuring element 240 detects and obtains the main pressure F0.

[0025] Combination Figures 3 to 4 As shown, the pressing assembly 220 includes a main plate 221 and n pressing blocks 222 evenly arranged on the main plate 221. Each pressing block 222 is provided with a micro pressure adjustment component 223 between itself and the main plate 221. The pressing end face of the pressing block 222 is provided with a force measuring element 224, and the force measuring element 224 obtains a partial pressure F1.

[0026] During operation, if F1 exceeds the preset threshold of F0 / n, the micro-pressure regulator 223 will operate; if F1 does not exceed the preset threshold of F0 / n, the current state of the micro-pressure regulator 223 will be maintained.

[0027] The working principle of this invention is as follows: During operation, the battery pack is placed on the work platform 100. Two main clamping mechanisms 200 located on both sides of the work platform 100 move synchronously along opposite sliding strokes under driving action to clamp the battery pack in a close-up manner. As the main clamping mechanisms 200 move, the pressing assembly 220 gradually contacts the corresponding pressure-bearing surface of the battery pack and applies an overall restraining force. During the application of the restraining force, the main force measuring element 240 located at the lower end of the main clamping mechanism 200 detects and obtains the overall main pressure F0 in real time. At the same time, the partial force measuring elements 224 located on the pressing end face of each pressing block 222 detect the partial pressure F1 applied by the corresponding pressing block 222. The system compares and judges the detected partial pressure F1 with the theoretical pressure value F0 / n after the main pressure F0 is distributed according to the number of pressing blocks 222 n.

[0028] When the partial pressure F1 corresponding to a certain pressure block 222 exceeds the preset threshold of F0 / n, the micro pressure regulating component 223 corresponding to the pressure block 222 is driven to operate, and the local pressure applied to the pressure block 222 is adjusted; when the partial pressure F1 does not exceed the preset threshold, the current state of the micro pressure regulating component 223 is maintained, thereby realizing the regulation of the local pressure state on the basis of overall restraint, and completing the battery pack restraint operation.

[0029] Combination Figure 4As shown in this embodiment, the micro-pressure regulating component 223 is a micro-airbag, which is disposed between the pressure block 222 and the main body plate 221. The micro-airbag is connected to an air tube, and a pressure control valve 225 is provided on the air tube to adjust the gas pressure inside the micro-airbag so as to change the local pressure applied by the pressure block 222 to the battery pack.

[0030] It should be noted that the micro-pressure regulating component 223 is configured as a miniature airbag not simply as a buffer, but as a controllable flexible actuator participating in local pressure regulation. The output force of the airbag comes from the product of its internal gas pressure and its effective pressure-bearing area, satisfying the relationship F=P×A, where P is the internal pressure of the airbag and A is the effective pressure-bearing area of ​​the airbag. Therefore, provided that the strength of the airbag material and the structural dimensions meet the design requirements, the output force of the pressure block 222 can be continuously and adjustablely controlled by adjusting the gas pressure. Compared to rigid spring elements, the output force of the airbag can be dynamically adjusted by the external pressure control valve 225, rather than relying on a fixed elastic stiffness, thus possessing higher adjustment accuracy and adaptability.

[0031] Meanwhile, the overall restraining force applied by the main restraining mechanism 200 in this device is mainly borne by the frame assembly 210 and the first elastic element 230. The micro airbag only performs fine-tuning compensation for the local pressure of a single pressure block 222 and does not bear the entire main restraining load. Therefore, the airbag in this design is subjected to a local pressure regulating load, and its load-bearing requirement is much smaller than the main load requirement of the overall restraining structure, enabling it to operate stably within a reasonably designed working pressure range.

[0032] Furthermore, the gas inside the airbag has a certain degree of compressibility, enabling it to exhibit equivalent elastic properties when subjected to changes in force, thus forming a compliant support layer between the pressure block 222 and the battery pack. When bulges or stress concentrations occur in localized areas, the airbag can absorb instantaneous pressure peaks and compensate or release them through a pressure regulating valve, thereby preventing the rigid structure from directly acting on the battery pack surface and causing localized overpressure.

[0033] Combination Figure 4 As shown, in this embodiment, the main body plate 221 is provided with mounting grooves 226 that correspond one-to-one with the pressure block 222. One end of the pressure block 222 is housed in the mounting groove 226 and can slide slightly along the extension direction of the mounting groove 226. A limiting part 227 is provided at the groove opening of the mounting groove 226 to limit the sliding stroke of the pressure block 222.

[0034] The main body plate 221 is provided with elastic support arms 228 on both sides. The elastic support arms 228 abut against the limiting part 227 and are used to reset the pressure block 222 and maintain its initial working position when the micro pressure adjustment part 223 is not activated.

[0035] It should be noted that, on the one hand, this structure provides a guide path for the micro-displacement of the pressure block 222, ensuring that the pressure block 222 moves stably in a predetermined direction when the force is adjusted, avoiding deviation or tilting; on the other hand, a limiting part 227 is provided at the slot opening of the mounting groove 226 to limit the maximum sliding stroke of the pressure block 222, thereby preventing the pressure block 222 from detaching from the main body plate 221 or from generating excessive displacement.

[0036] The elastic support arms 228 on both sides of the main body plate 221 abut against the limiting part 227. When the micro-pressure adjusting component 223 is not activated or the pressure is released, they provide a return elastic force to the pressure block 222, causing the pressure block 222 to automatically return to its initial working position and maintain its basic stress state. Through the cooperation of the above-mentioned guiding, limiting and resetting structures, the pressure block 222 has both adjustability and stability and reliability during micro-pressure adjustment.

[0037] As an optional solution in this embodiment, n pressure blocks 222 are evenly arranged side by side along the vertical or horizontal direction of the main body plate 221; Alternatively, n pressure blocks 222 are arranged in an array on the main plate 221 to perform multi-point pressure adjustment according to the area distribution of the pressure surface of the battery pack.

[0038] It should be noted that the n pressure blocks 222 can be evenly arranged side by side along the vertical or horizontal direction of the main body plate 221 to adapt to the structural form of the battery pack where the force distribution is relatively concentrated in a single direction; or, the n pressure blocks 222 can be arranged in an array on the main body plate 221, so that the pressure blocks 222 cover multiple areas of the pressure surface of the battery pack, thereby realizing multi-point distributed pressure control. By selecting different arrangement methods, targeted design can be made according to the size, shape, internal structure and bulging-prone areas of the battery pack, so that the force measuring element 224 can more accurately reflect the force situation of each area, and cooperate with the micro-pressure adjustment element 223 for local adjustment.

[0039] Combination Figure 4 As shown, in this embodiment, the pressure block 222 has a receiving groove on one end face away from the main body plate 221, and the force measuring element 224 is installed in the receiving groove; wherein, the force measuring element 224 is a button-type pressure sensor, and the button-type pressure sensor transmits signals through leads.

[0040] By embedding the force-measuring element 224 within the receiving groove, the sensor's exposure to external impacts or lateral shear forces can be effectively prevented. The button-type pressure sensor is small and thin, suitable for embedded installation. Its force-bearing surface aligns with the force direction of the pressure block 222's end face, allowing the localized pressure applied by the battery pack to the pressure block 222 to be directly transmitted axially to the sensor. Signal transmission via leads allows the corresponding partial pressure F1 of each pressure block 222 to be transmitted to the control system in real time, enabling independent monitoring of the force state in different areas and providing a reliable data basis for the dynamic adjustment of the micro-pressure regulator 223.

[0041] Combination Figure 3 As shown in this embodiment, the first elastic element 230 is a corrugated elastic component, which is arranged along the force direction of the main clamping mechanism 200; one end of the elastic component is fixedly connected to the lower end of the frame component 210, and the other end is connected to the main force measuring element 240. The corrugated elastic components are configured in one or more parallel arrangements to generate elastic deformation when the main clamping mechanism 200 applies a clamping force, so as to buffer the loading impact of the main clamping mechanism 200 and transmit the main pressure to the main force measuring element 240.

[0042] It should be noted that, compared to ordinary straight rod elastic components or simple rubber pads, the corrugated structure has a more significant axial elastic deformation capacity and buffering characteristics, which can absorb impact energy in the early stages of loading and reduce the impact of instantaneous impact on the battery pack and force measuring element. At the same time, the corrugated structure has a relatively stable force-displacement response curve under axial force, which is conducive to the smooth transmission of the overall clamping force to the main force measuring element 240.

[0043] When configured as multiple parallel structures, the overall load-bearing capacity can be improved and the equivalent stiffness can be adjusted to adapt to the restraint requirements of battery packs of different specifications. Therefore, this corrugated elastic component not only serves as a buffer and shock absorber but also ensures the stability and reliability of the main pressure detection.

[0044] In this embodiment, the main force measuring element 240 is specifically disposed between the first elastic member 230 and the frame assembly 210, and the main force measuring element 240 is arranged along the force direction of the main clamping mechanism 200. The main force measuring element 240 includes a force sensor body and a signal output terminal connected thereto. The force-bearing end of the force sensor body abuts against or is fixedly connected to the first elastic member 230, and the other end is fixedly connected to the frame assembly 210. The main force measuring element 240 is used to detect the overall main pressure F0 applied by the main clamping mechanism 200 to the battery pack and outputs the detection signal to the control system.

[0045] Combination Figure 5As shown, in this embodiment, the restraint device further includes two sets of side restraint mechanisms 300 disposed on the work platform 100, and the two sets of side restraint mechanisms 300 and the two sets of main restraint mechanisms 200 form a restraint space for restraining the battery pack. The side clamping mechanism 300 includes a side support frame 310 and a side pressure plate 320 disposed on the side support frame 310. The side pressure plate 320 is adjustable in a direction perpendicular to the sliding direction of the main clamping mechanism 200. The side pressure plate 320 is used to limit or assist in clamping the side of the battery pack to form a four-way clamping structure in conjunction with the main clamping mechanism 200.

[0046] By connecting or fixing the force-receiving end of the force sensor body to the first elastic element 230, and fixing the other end to the frame assembly 210, the overall clamping force is ensured to pass through the main force-measuring element 240 during transmission, thus guaranteeing the accuracy of the main pressure F0 detection. This linear force arrangement reduces the interference of lateral forces or off-center loads on the measurement results and improves detection stability. Simultaneously, the detection signal is transmitted to the control system via the signal output terminal, allowing the overall main pressure to be used as reference data and compared with the partial pressure F1 detected by each pressure block 222, achieving overall-local coordinated control.

[0047] Combination Figure 6 As shown, in this embodiment, the restraint device further includes a drive mechanism 400 disposed below the work platform 100. The drive mechanism 400 includes a drive motor 410. The output shaft of the drive motor 410 is provided with transmission shafts 420 at both ends. One end of the transmission shaft 420 is connected to a lead screw 430 through a coupling assembly. The threads of the two sets of lead screws 430 are arranged in opposite directions. The lower end face of the frame assembly 210 is provided with a nut seat 440, and the lead screw 430 passes through the nut seat 440 to push the two sets of main clamping mechanisms 200 to move towards each other.

[0048] The main clamping mechanism 200 applies overall clamping force primarily in opposite directions, while the side clamping mechanism 300 limits or assists in clamping the sides of the battery pack in a direction perpendicular to the sliding direction of the main clamping mechanism 200. The side support frame 310 in the side clamping mechanism 300 provides structural support, and the side pressure plate 320 can be adjusted vertically to accommodate battery packs of different widths. By stably limiting the sides of the battery pack through the side pressure plate 320, lateral displacement or tilting during the main clamping loading process can be prevented, thus ensuring overall force symmetry.

[0049] In this embodiment, a slide rail 110 is provided on each side of the work platform 100, and the frame assembly 210 is slidably connected to the corresponding slide rail 110. The frame assembly 210 is provided with a sensor plate 211, and a number of sensors 111 are provided on one side of the slide rail 110. The sensor plate 211 and the sensors 111 cooperate to detect the sliding position of the main clamping mechanism 200.

[0050] The slide rail 110 structure restricts the frame assembly 210 to move only in a predetermined direction, preventing swaying or tilting and improving the smoothness of the clamping movement. Simultaneously, a sensing plate 211 is installed on the frame assembly 210, and several sensors 111 are correspondingly installed on one side of the slide rail 110. Through the cooperation of the sensing plate 211 and the sensors 111, the sliding position of the main clamping mechanism 200 is detected. This position detection structure can provide real-time feedback on the travel distance and current position of the main clamping mechanism 200, providing precise position information for the control system, thereby achieving controllable management of the clamping travel, and can be used in conjunction with the detection data from the main force measuring element 240.

[0051] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for adding and releasing restraints on a battery pack, characterized in that, Includes: a work platform, and a main clamping mechanism slidably disposed on both sides of the work platform, wherein the sliding strokes of the two main clamping mechanisms are arranged facing each other; The main clamping mechanism includes a frame assembly, the upper end of which is provided with a pressing assembly, and the lower end of which is provided with a first elastic element. One end of the first elastic element is provided with a main force measuring element, and the main force measuring element detects and obtains the main pressure F0. The pressing assembly includes a main plate and n pressing blocks evenly arranged on the main plate. Each pressing block is provided with a micro-pressure adjustment component between itself and the main plate. The pressing end face of the pressing block is provided with a force measuring element, and the force measuring element obtains a partial pressure F1. During operation, if F1 exceeds the preset threshold of F0 / n, the micro-pressure regulating component will operate; If F1 does not exceed the preset threshold of F0 / n, the current state of the micro-pressure regulator is maintained.

2. The battery pack restraint device according to claim 1, characterized in that, The micro-pressure regulating component is a micro-airbag, which is disposed between the pressure block and the main body plate; The micro airbag is connected to an air tube, and a pressure control valve is provided on the air tube to adjust the gas pressure inside the micro airbag, thereby changing the local pressure applied by the pressure block to the battery pack.

3. The battery pack restraint device according to claim 1, characterized in that, The main body plate has mounting grooves that correspond one-to-one with the pressure blocks. One end of each pressure block is housed in the mounting groove and can slide slightly along the extension direction of the mounting groove. The mounting groove is provided with a limiting part at the groove opening to limit the sliding stroke of the pressure block; The main body plate is provided with elastic support arms on both sides. The elastic support arms abut against the limiting part and are used to reset the pressure block and maintain its initial working position when the micro pressure adjustment component is not activated.

4. The battery pack restraint device according to claim 1, characterized in that, The n pressure blocks are evenly arranged side by side along the vertical or horizontal direction of the main body plate; Alternatively, the n pressure blocks are arranged in an array on the main body plate to perform multi-point pressure adjustment according to the regional distribution of the pressure surface of the battery pack.

5. The battery pack restraint device according to claim 1, characterized in that, The pressure block has a receiving groove on one end face away from the main body plate, and the force measuring element is installed in the receiving groove; The force measuring element is a button-type pressure sensor, which transmits signals via leads.

6. The battery pack restraint device according to claim 1, characterized in that, The first elastic element is a corrugated elastic component, which is arranged along the force direction of the main clamping mechanism; One end of the elastic component is fixedly connected to the lower end of the frame component, and the other end is connected to the main force measuring element; The corrugated elastic components are configured in one or more parallel connections to generate elastic deformation when the main restraining mechanism applies a restraining force.

7. The battery pack restraint device according to claim 6, characterized in that, The main force measuring element is disposed between the first elastic element and the frame assembly, and the main force measuring element is arranged along the force direction of the main clamping mechanism; The main force measuring element includes a force sensor body and a signal output terminal connected thereto. The force-receiving end of the force sensor body is abutted or fixedly connected to the first elastic element, and the other end is fixedly connected to the frame assembly.

8. The battery pack restraint device according to claim 1, characterized in that, It also includes two sets of side clamping mechanisms disposed on the work platform, and the two sets of side clamping mechanisms and the two sets of main clamping mechanisms form a clamping space for clamping the battery pack. The side clamping mechanism includes a side support frame and a side pressure plate disposed on the side support frame. The side pressure plate is adjustable in a direction perpendicular to the sliding direction of the main clamping mechanism. The side pressure plate is used to limit or assist in clamping the side of the battery pack, so as to form a four-way clamping structure in conjunction with the main clamping mechanism.

9. The battery pack restraint device according to claim 1, characterized in that, It also includes a drive mechanism disposed below the work platform. The drive mechanism includes a drive motor. The output shaft of the drive motor is provided with transmission shafts at both ends. One end of the transmission shaft is connected to a lead screw through a coupling assembly. The threads of the two sets of lead screws are arranged in opposite directions. The lower end face of the frame assembly is provided with a nut seat, and the lead screw passes through the nut seat to push the two sets of main clamping mechanisms to move towards each other.

10. The battery pack restraint device according to claim 1, characterized in that, A slide rail is provided on each side of the work platform, and the frame assembly is slidably connected to the corresponding slide rail; The frame assembly is equipped with a sensor plate, and a number of sensors are correspondingly arranged on one side of the slide rail. The sensor plate and the sensors work together to detect the sliding position of the main clamping mechanism.

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